PATENT DOCUMENT

Publication Number: US-11490017-B2
Application Number: US-202117409598-A
Country: US
Kind Code: B2

Title: Digital viewfinder user interface for multiple cameras

Abstract:
An electronic device has multiple cameras and displays a digital viewfinder user interface for previewing visual information provided by the cameras. The multiple cameras may have different properties such as focal lengths. When a single digital viewfinder is provided, the user interface allows zooming over a zoom range that includes the respective zoom ranges of both cameras. The zoom setting to determine which camera provides visual information to the viewfinder and which camera is used to capture visual information. The user interface also allows the simultaneous display of content provided by different cameras at the same time. When two digital viewfinders are provided, the user interface allows zooming, freezing, and panning of one digital viewfinder independently of the other. The device allows storing of a composite images and/or videos using both digital viewfinders and corresponding cameras.

Claims:
What is claimed is: 
     
       1. A computer system comprising:
 a display device; 
 a first camera, and a second camera, wherein the second camera has a field of view that is wider than a field of view of the first camera and the field of view of the first camera overlaps with the field of view of the second camera; 
 one or more processors; 
 memory storing one or more programs configured to be executed by the one or more processors, the one or more programs including instructions for:
 displaying, via the display device, a camera user interface for capturing media that includes concurrently displaying:
 a live camera preview; and 
 a zoom indicator, wherein the zoom indicator includes:
 a first portion that corresponds to the field of view of the first camera, 
 a second portion that corresponds to the field of view of the second camera, 
 a graphical indicator of a boundary between the first portion of the zoom indicator and the second portion of the zoom indicator, and 
 a graphical indicator of a current zoom level; 
 
 
 while concurrently displaying the live camera preview and the zoom indicator, detecting a zoom input; and 
 in response to detecting the zoom input, moving the graphical indicator of the current zoom level in the camera user interface, wherein the graphical indicator of the current zoom level moves relative to the graphical indicator of the boundary between the first portion of the zoom indicator and the second portion of the zoom indicator. 
 
 
     
     
       2. The computer system of  claim 1 , wherein the zoom input includes an input directed to the zoom indicator. 
     
     
       3. The computer system of  claim 1 , wherein the zoom input includes a touch input at an area on the display corresponding to the zoom indicator. 
     
     
       4. The computer system of  claim 1 , wherein the zoom input includes a depinch input directed to the live camera preview. 
     
     
       5. The computer system of  claim 1 , wherein the zoom input includes a multi-finger touch input at an area on the display corresponding to the live camera preview. 
     
     
       6. The computer system of  claim 1 , the one or more programs further including instructions for:
 while the graphical indicator of the current zoom level is within a predetermined distance threshold of a location corresponding to the graphical indicator of the boundary between the first portion of the zoom indicator and the second portion of the zoom indicator, detecting a second zoom input; 
 in response to detecting the second zoom input:
 in accordance with a determination that the second zoom input exceeds a predetermined input magnitude, moving the graphical indicator of the current zoom level away from the location corresponding to the graphical indicator of the boundary between the first portion of the zoom indicator and the second portion of the zoom indicator; and 
 in accordance with a determination that the second zoom input does not exceed the predetermined input magnitude, forgoing moving the graphical indicator of the current zoom level away from the location corresponding to the graphical indicator of the boundary between the first portion of the zoom indicator and the second portion of the zoom indicator. 
 
 
     
     
       7. The computer system of  claim 1 , the one or more programs further including instructions for:
 while the graphical indicator of the current zoom level is at a location corresponding to the second portion of the zoom indicator:
 detecting a third zoom input corresponding to movement away from the first portion of the zoom indicator; and 
 in response to detecting the third zoom input, performing a digital zoom operation on the live camera preview. 
 
 
     
     
       8. The computer system of  claim 1 , wherein the live camera preview includes content corresponding to the field of view of the first camera or the field of view of the second camera. 
     
     
       9. A method comprising,
 at an electronic device with a display device, a first camera, and a second camera, wherein the second camera has a field of view that is wider than a field of view of the first camera and the field of view of the first camera overlaps with the field of view of the second camera:
 displaying, via the display device, a camera user interface for capturing media that includes concurrently displaying:
 a live camera preview; and 
 a zoom indicator, wherein the zoom indicator includes:
 a first portion that corresponds to the field of view of the first camera, 
 a second portion that corresponds to the field of view of the second camera, 
 a graphical indicator of a boundary between the first portion of the zoom indicator and the second portion of the zoom indicator, and 
 a graphical indicator of a current zoom level; 
 
 
 while concurrently displaying the live camera preview and the zoom indicator, detecting a zoom input; and 
 in response to detecting the zoom input, moving the graphical indicator of the current zoom level in the camera user interface, wherein the graphical indicator of the current zoom level moves relative to the graphical indicator of the boundary between the first portion of the zoom indicator and the second portion of the zoom indicator. 
 
 
     
     
       10. A non-transitory computer-readable storage medium storing one or more programs configured to be executed by one or more processors of a computer system that is in communication with a display device, a first camera, and a second camera, wherein the second camera has a field of view that is wider than a field of view of the first camera and the field of view of the first camera overlaps with the field of view of the second camera, the one or more programs including instructions for:
 displaying, via the display device, a camera user interface for capturing media that includes concurrently displaying:
 a live camera preview; and 
 a zoom indicator, wherein the zoom indicator includes:
 a first portion that corresponds to the field of view of the first camera, 
 a second portion that corresponds to the field of view of the second camera, 
 a graphical indicator of a boundary between the first portion of the zoom indicator and the second portion of the zoom indicator, and 
 a graphical indicator of a current zoom level; 
 
 
 while concurrently displaying the live camera preview and the zoom indicator, detecting a zoom input; and 
 in response to detecting the zoom input, moving the graphical indicator of the current zoom level in the camera user interface, wherein the graphical indicator of the current zoom level moves relative to the graphical indicator of the boundary between the first portion of the zoom indicator and the second portion of the zoom indicator. 
 
     
     
       11. The method of  claim 9 , wherein the zoom input includes an input directed to the zoom indicator. 
     
     
       12. The method of  claim 9 , wherein the zoom input includes a touch input at an area on the display corresponding to the zoom indicator. 
     
     
       13. The method of  claim 9 , wherein the zoom input includes a depinch input directed to the live camera preview. 
     
     
       14. The method of  claim 9 , wherein the zoom input includes a multi-finger touch input at an area on the display corresponding to the live camera preview. 
     
     
       15. The method of  claim 9 , the method further comprising:
 while the graphical indicator of the current zoom level is within a predetermined distance threshold of a location corresponding to the graphical indicator of the boundary between the first portion of the zoom indicator and the second portion of the zoom indicator, detecting a second zoom input; 
 in response to detecting the second zoom input:
 in accordance with a determination that the second zoom input exceeds a predetermined input magnitude, moving the graphical indicator of the current zoom level away from the location corresponding to the graphical indicator of the boundary between the first portion of the zoom indicator and the second portion of the zoom indicator; and 
 in accordance with a determination that the second zoom input does not exceed the predetermined input magnitude, forgoing moving the graphical indicator of the current zoom level away from the location corresponding to the graphical indicator of the boundary between the first portion of the zoom indicator and the second portion of the zoom indicator. 
 
 
     
     
       16. The method of  claim 9 , the method further comprising:
 while the graphical indicator of the current zoom level is at a location corresponding to the second portion of the zoom indicator: 
 detecting a third zoom input corresponding to movement away from the first portion of the zoom indicator; and 
 in response to detecting the third zoom input, performing a digital zoom operation on the live camera preview. 
 
     
     
       17. The method of  claim 9 , wherein the live camera preview includes content corresponding to the field of view of the first camera or the field of view of the second camera. 
     
     
       18. The non-transitory computer-readable storage medium of  claim 10 , wherein the zoom input includes an input directed to the zoom indicator. 
     
     
       19. The non-transitory computer-readable storage medium of  claim 10 , wherein the zoom input includes a touch input at an area on the display corresponding to the zoom indicator. 
     
     
       20. The non-transitory computer-readable storage medium of  claim 10 , wherein the zoom input includes a depinch input directed to the live camera preview. 
     
     
       21. The non-transitory computer-readable storage medium of  claim 10 , wherein the zoom input includes a multi-finger touch input at an area on the display corresponding to the live camera preview. 
     
     
       22. The non-transitory computer-readable storage medium of  claim 10 , the one or more programs further including instructions for:
 while the graphical indicator of the current zoom level is within a predetermined distance threshold of a location corresponding to the graphical indicator of the boundary between the first portion of the zoom indicator and the second portion of the zoom indicator, detecting a second zoom input; 
 in response to detecting the second zoom input:
 in accordance with a determination that the second zoom input exceeds a predetermined input magnitude, moving the graphical indicator of the current zoom level away from the location corresponding to the graphical indicator of the boundary between the first portion of the zoom indicator and the second portion of the zoom indicator; and 
 in accordance with a determination that the second zoom input does not exceed the predetermined input magnitude, forgoing moving the graphical indicator of the current zoom level away from the location corresponding to the graphical indicator of the boundary between the first portion of the zoom indicator and the second portion of the zoom indicator. 
 
 
     
     
       23. The non-transitory computer-readable storage medium of  claim 10 , the one or more programs further including instructions for:
 while the graphical indicator of the current zoom level is at a location corresponding to the second portion of the zoom indicator:
 detecting a third zoom input corresponding to movement away from the first portion of the zoom indicator; and 
 in response to detecting the third zoom input, performing a digital zoom operation on the live camera preview. 
 
 
     
     
       24. The non-transitory computer-readable storage medium of  claim 10 , wherein the live camera preview includes content corresponding to the field of view of the first camera or the field of view of the second camera.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This Application is a continuation of U.S. application Ser. No. 16/840,719, entitled “DIGITAL VIEWFINDER USER INTERFACE FOR MULTIPLE CAMERAS,” filed Apr. 6, 2020, which is a continuation of U.S. application Ser. No. 16/143,396, entitled “DIGITAL VIEWFINDER USER INTERFACE FOR MULTIPLE CAMERAS,” filed Sep. 26, 2018, which is a continuation of U.S. application Ser. No. 15/863,369, entitled “DIGITAL VIEWFINDER USER INTERFACE FOR MULTIPLE CAMERAS,” filed Jan. 5, 2018, which is a continuation of U.S. application Ser. No. 15/136,323, entitled “DIGITAL VIEWFINDER USER INTERFACE FOR MULTIPLE CAMERAS,” filed Apr. 22, 2016, which claims the benefit of U.S. Provisional Application No. 62/151,955, entitled “DIGITAL VIEWFINDER USER INTERFACE FOR MULTIPLE CAMERAS,” filed on Apr. 23, 2015, which are hereby incorporated by reference in their entirety. 
    
    
     FIELD 
     The disclosed examples relate generally to user interfaces of electronic devices, particularly devices having built-in cameras. 
     BACKGROUND 
     Some portable electronic devices have built-in cameras. These devices may provide digital viewfinders for user-interaction with the cameras. The digital viewfinders may allow variable image zooming through the use of optical and/or digital magnification. Optical magnification provides better visual quality but introduces complexities in the device&#39;s optical train, as optical zooming is achieved by moving physical components (e.g., lenses) along a physical, optical train. Digital magnification avoids these complexities, thereby permitting more efficient device packaging, but may suffer in visual quality. 
     SUMMARY 
     In some embodiments, at an electronic device with a first camera, a second camera, and a display, performing a method comprising: displaying a digital viewfinder comprising content from one of the first and second cameras displayed at a zoom setting; detecting input representing an instruction to store visual media; in response to detecting the input representing the instruction to store visual media: in accordance with a determination that the zoom setting is below a threshold zoom value, storing visual media using content from the first camera; and in accordance with a determination that the zoom setting is above the threshold zoom value, storing visual media using content from the second camera. 
     In some embodiments, at an electronic device with a first camera, a second camera, and a display, performing a method comprising: displaying, in a first portion of the display, a first digital viewfinder, the first digital viewfinder displaying content from the first camera; displaying, in a second portion of the display, a second digital viewfinder, the second digital viewfinder displaying content from the second camera; detecting a first input representing an instruction to zoom the first digital viewfinder; in response to detecting the first input, zooming the first digital viewfinder independently of the second digital viewfinder; detecting a second input representing an instruction to freeze the first digital viewfinder; and in response to detecting the second input, freezing the first digital viewfinder independently of the second digital viewfinder. 
     In some embodiments, at an electronic device with a first camera, a second camera, and a display, performing a method comprising: displaying in a first portion of the display a first digital viewfinder, the first digital viewfinder displaying content from the first camera; displaying in a second portion of the display a second digital viewfinder, the second digital viewfinder displaying content from the second camera; detecting a first input; and in response to detecting the first input, concurrently storing first visual media using content from the first camera and storing second visual media using content from the second camera, wherein the first and the second cameras have overlapping fields of view, and wherein the first visual media and the second visual media have different visual characteristics. 
     In some embodiments, a non-transitory computer readable storage medium stores computer-executable instructions, the computer-executable instructions comprising instructions, which when executed by a device, cause the device to: display a digital viewfinder comprising content from one of a first and a second camera displayed at a zoom setting; detect input representing an instruction to store visual media; in response to detecting the input representing the instruction to store visual media: in accordance with a determination that the zoom setting is below a threshold zoom value, store visual media using content from the first camera; and in accordance with a determination that the zoom setting is above the threshold zoom value, store visual media using content from the second camera. 
     In some embodiments, a non-transitory computer readable storage medium stores computer-executable instructions, the computer-executable instructions comprising instructions, which when executed by a device, cause the device to: display, in a first portion of a display, a first digital viewfinder, the first digital viewfinder displaying content from a first camera; display, in a second portion of the display, a second digital viewfinder, the second digital viewfinder displaying content from a second camera; detect a first input representing an instruction to zoom the first digital viewfinder; in response to detecting the first input, zooming the first digital viewfinder independently of the second digital viewfinder; detect a second input representing an instruction to freeze the first digital viewfinder; and in response to detecting the second input, freezing the first digital viewfinder independently of the second digital viewfinder. 
     In some embodiments, a non-transitory computer readable storage medium stores computer-executable instructions, the computer-executable instructions comprising instructions, which when executed by a device, cause the device to: display in a first portion of the display a first digital viewfinder, the first digital viewfinder displaying content from the first camera; display in a second portion of the display a second digital viewfinder, the second digital viewfinder displaying content from the second camera; detect a first input; and in response to detecting the first input, concurrently store first visual media using content from the first camera and store second visual media using content from the second camera, wherein the first and the second cameras have overlapping fields of view, and wherein the first visual media and the second visual media have different visual characteristics. 
     In some embodiments, a transitory computer readable storage medium stores computer-executable instructions, the computer-executable instructions comprising instructions, which when executed by a device, cause the device to: display a digital viewfinder comprising content from one of a first and a second camera displayed at a zoom setting; detect input representing an instruction to store visual media; in response to detecting the input representing the instruction to store visual media: in accordance with a determination that the zoom setting is below a threshold zoom value, store visual media using content from the first camera; and in accordance with a determination that the zoom setting is above the threshold zoom value, store visual media using content from the second camera. 
     In some embodiments, a transitory computer readable storage medium stores computer-executable instructions, the computer-executable instructions comprising instructions, which when executed by a device, cause the device to: display, in a first portion of a display, a first digital viewfinder, the first digital viewfinder displaying content from a first camera; display, in a second portion of the display, a second digital viewfinder, the second digital viewfinder displaying content from a second camera; detect a first input representing an instruction to zoom the first digital viewfinder; in response to detecting the first input, zooming the first digital viewfinder independently of the second digital viewfinder; detect a second input representing an instruction to freeze the first digital viewfinder; and in response to detecting the second input, freezing the first digital viewfinder independently of the second digital viewfinder. 
     In some embodiments, a transitory computer readable storage medium stores computer-executable instructions, the computer-executable instructions comprising instructions, which when executed by a device, cause the device to: display in a first portion of the display a first digital viewfinder, the first digital viewfinder displaying content from the first camera; display in a second portion of the display a second digital viewfinder, the second digital viewfinder displaying content from the second camera; detect a first input; and in response to detecting the first input, concurrently store first visual media using content from the first camera and store second visual media using content from the second camera, wherein the first and the second cameras have overlapping fields of view, and wherein the first visual media and the second visual media have different visual characteristics. 
     In some embodiments, a device comprises: one or more processors; a memory; and computer-executable instructions, wherein the computer-executable instructions are stored in the memory and configured to be executed by the one or more processors, the computer-executable instructions including instructions for: display a digital viewfinder comprising content from one of a first and a second camera displayed at a zoom setting; detect input representing an instruction to store visual media; in response to detecting the input representing the instruction to store visual media: in accordance with a determination that the zoom setting is below a threshold zoom value, store visual media using content from the first camera; and in accordance with a determination that the zoom setting is above the threshold zoom value, store visual media using content from the second camera. 
     In some embodiments, a device comprises: one or more processors; a memory; and computer-executable instructions, wherein the computer-executable instructions are stored in the memory and configured to be executed by the one or more processors, the computer-executable instructions including instructions for: display, in a first portion of a display, a first digital viewfinder, the first digital viewfinder displaying content from a first camera; display, in a second portion of the display, a second digital viewfinder, the second digital viewfinder displaying content from a second camera; detect a first input representing an instruction to zoom the first digital viewfinder; in response to detecting the first input, zooming the first digital viewfinder independently of the second digital viewfinder; detect a second input representing an instruction to freeze the first digital viewfinder; and in response to detecting the second input, freezing the first digital viewfinder independently of the second digital viewfinder. 
     In some embodiments, a device comprises: one or more processors; a memory; and computer-executable instructions, wherein the computer-executable instructions are stored in the memory and configured to be executed by the one or more processors, the computer-executable instructions including instructions for: display in a first portion of the display a first digital viewfinder, the first digital viewfinder displaying content from the first camera; display in a second portion of the display a second digital viewfinder, the second digital viewfinder displaying content from the second camera; detect a first input; and in response to detecting the first input, concurrently store first visual media using content from the first camera and store second visual media using content from the second camera, wherein the first and the second cameras have overlapping fields of view, and wherein the first visual media and the second visual media have different visual characteristics. 
     In some embodiments, a device, comprises: means for displaying a digital viewfinder comprising content from one of a first and a second camera displayed at a zoom setting; means for detecting input representing an instruction to store visual media; means for, in response to detecting the input representing the instruction to store: in accordance with a determination that the zoom setting is below a threshold zoom value, storing visual media using content from the first camera; and in accordance with a determination that the zoom setting is above the threshold zoom value, storing visual media using content from the second camera. 
     In some embodiments, a device, comprises: means for displaying, in a first portion of the display, a first digital viewfinder, the first digital viewfinder displaying content from the first camera; means for displaying, in a second portion of the display, a second digital viewfinder, the second digital viewfinder displaying content from the second camera; means for detecting a first input representing an instruction to zoom the first digital viewfinder; means for, in response to detecting the first input, zooming the first digital viewfinder independently of the second digital viewfinder; means for detecting a second input representing an instruction to freeze the first digital viewfinder; and means for, in response to detecting the second input, freezing the first digital viewfinder independently of the second digital viewfinder. 
     In some embodiments, a device, comprises: means for displaying in a first portion of the display a first digital viewfinder, the first digital viewfinder displaying content from a first camera; means for displaying in a second portion of the display a second digital viewfinder, the second digital viewfinder displaying content from a second camera; means for detecting a first input; and means for, in response to detecting the first input, concurrently storing first visual media using content from the first camera and storing second visual media using content from the second camera, wherein the first and the second cameras have overlapping fields of view, and wherein the first visual media and the second visual media have different visual characteristics. 
     In some embodiments, a device, comprises: a display unit configured to displaying one or more digital viewfinders; an input detection unit configured to detect input representing an instruction to store visual media; a processing unit operatively coupled to the display unit and the input detection unit, configured to enable display, via the display unit, of a digital viewfinder comprising content from one of a first and a second camera displayed at a zoom setting; and a visual media storing unit configured to: store visual media using content from the first camera, in response to detecting the input representing the instruction to store visual media, and in accordance with a determination that the zoom setting is below a threshold zoom value; and store visual media using content from the second camera, in response to detecting the input representing the instruction to store visual media, and in accordance with a determination that the zoom setting is above the threshold zoom value. 
     In some embodiments, a device, comprises: a display unit configured to displaying two or more digital viewfinders; an input detection unit; and a processing unit operatively coupled to the display unit and the input detection unit, configured to: enable display, via a first portion of the display unit, of a first digital viewfinder, the first digital viewfinder displaying content from a first camera, and enable display, via a second portion of the display unit, of a second digital viewfinder, the second digital viewfinder displaying content from a second camera; detect, via the input detection unit, a first input representing an instruction to zoom the first digital viewfinder; in response to detecting the first input, zoom the first digital viewfinder independently of the second digital viewfinder; detect, via the input detection unit, a second input representing an instruction to freeze the first digital viewfinder; and in response to detecting the second input, freeze the first digital viewfinder independently of the second digital viewfinder. 
     In some embodiments, a device comprises: a display unit configured to displaying two or more digital viewfinders; an input detection unit; a processing unit operatively coupled to the display unit and the input detection unit, configured to: enable display, via a first portion of the display unit, of a first digital viewfinder, the first digital viewfinder displaying content from a first camera; enable display, via a second portion of the display unit, of a second digital viewfinder, the second digital viewfinder displaying content from a second camera; detect, via the input detection unit, a first input; and a visual media storing unit configured to, in response to detecting the first input, concurrently store first visual media using content from the first camera and store second visual media using content from the second camera, wherein the first and the second cameras have overlapping fields of view, and wherein the first visual media and the second visual media have different visual characteristics. 
     Executable instructions for performing these functions are, optionally, included in a non-transitory computer-readable storage medium or other computer program product configured for execution by one or more processors. Executable instructions for performing these functions are, optionally, included in a transitory computer-readable storage medium or other computer program product configured for execution by one or more processors. 
    
    
     
       DESCRIPTION OF THE FIGURES 
       For a better understanding of the various described embodiments, reference should be made to the Description of Embodiments below, in conjunction with the following drawings in which like reference numerals refer to corresponding parts throughout the figures. 
         FIG. 1A  is a block diagram illustrating a portable multifunction device with a touch-sensitive display in accordance with some embodiments. 
         FIG. 1B  is a block diagram illustrating exemplary components for event handling in accordance with some embodiments. 
         FIG. 2A  illustrates a portable multifunction device having a touch-sensitive display in accordance with some embodiments. 
         FIG. 2B  illustrates a portable multifunction device having multiple cameras in accordance with some embodiments. 
         FIG. 3  is a block diagram of an exemplary multifunction device with a display and a touch-sensitive surface in accordance with some embodiments. 
         FIGS. 4A and 4B  illustrate an exemplary user interface for a menu of applications on a portable multifunction device in accordance with some embodiments. 
         FIGS. 5A-5T  illustrate exemplary user interfaces for providing viewfinder zoom capabilities using multiple cameras in accordance with some embodiments. 
         FIGS. 6A-6G  illustrate exemplary user interfaces for storing visual content using multiple cameras in accordance with some embodiments. 
         FIG. 7  illustrates an exemplary user interface for storing visual content using multiple cameras in accordance with some embodiments. 
         FIGS. 8A-8C  are flow diagrams illustrating an exemplary process for providing viewfinder zoom capabilities using multiple cameras in accordance with some embodiments. 
         FIG. 9  is a flow diagram illustrating an exemplary process for storing visual content using multiple cameras in accordance with some embodiments. 
         FIG. 10  is a flow diagram illustrating an exemplary process for storing visual content using multiple cameras in accordance with some embodiments. 
         FIG. 11  is a functional block diagram of an electronic device configured to utilize multiple cameras to capture images and/or videos in accordance with some embodiments. 
         FIG. 12  is a functional block diagram of an electronic device configured to utilize multiple cameras to capture images and/or videos in accordance with some embodiments. 
         FIG. 13  is a functional block diagram of an electronic device configured to utilize multiple cameras to capture images and/or videos in accordance with some embodiments. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The following description sets forth exemplary methods, parameters, and the like. It should be recognized, however, that such description is not intended as a limitation on the scope of the present disclosure but is instead provided as a description of exemplary embodiments. 
     Efficient device packaging allows desirable, highly-portable electronic devices to be designed and manufactured. But, some electronic device components complicate the design of smaller devices, particularly thinner ones. Camera sensors and related components constitute an example: they involve physical components organized along optical trains that lend to thicker designs. Consider, for instance, the ability of a camera (e.g., CCD sensor and related lenses) to perform variable optical zooming depends on the arrangement of moveable (e.g., motorized) lens(es) among an optical train. When incorporated into cellular phones, the usual orientation of camera components is at odds with the form-factor of the overall phone: the camera&#39;s optical train typically runs along the thickness of the device. The use of cameras of thinner design—such as fixed focal length cameras—introduces other issues. Namely, fixed focal length cameras do not have variable, optical zoom capabilities. While it is still possible to perform digital zooming, digital zooming impacts image quality. 
     The embodiments described herein include electronic devices that utilize multiple cameras to provide improved camera capabilities. In some embodiments, multiple cameras of fixed focal length are used with variable digital magnification to mimic optical zooming capabilities. The described embodiments also include complementary user interfaces that enable these improved camera capabilities. 
     Together, the described embodiments permit efficient packaging and production of thin and light devices, while improving the performance of the device&#39;s camera optical capabilities. The use of fixed focal length cameras is beneficial as they are thinner than their variable focal length counterparts. The use of multiple cameras permit an approximation of optical zoom even if the underlying cameras are not capable of variable optical magnification. Intuitive user interfaces allow users to leverage the benefits of multiple on-board cameras without placing undue cognitive burdens on the user, thereby producing a more efficient human-machine interface. In battery-operated embodiments, the described embodiments also conserve power and increase run-time between battery charges, as the use of fixed focal length cameras to simulate optical zooming avoids battery consumption by motorized lenses used in conventional variable, optical zooming cameras. 
     Below,  FIGS. 1A-1B, 2A-2B, 3, 4A-4B, and 11  provide a description of exemplary devices that utilize multiple cameras to provide camera zooming, and other related capabilities.  FIGS. 5A-5T, 6A-6G, and 7  illustrate exemplary user interfaces supporting these capabilities. These figures are also used to illustrate the processes described below, including those described in  FIGS. 8A-8C, 9, and 10 . 
     Although the following description uses terms “first,” “second,” etc. to describe various elements, these elements should not be limited by the terms. These terms are only used to distinguish one element from another. For example, a first touch could be termed a second touch, and, similarly, a second touch could be termed a first touch, without departing from the scope of the various described embodiments. The first touch and the second touch are both touches, but they are not the same touch. 
     The terminology used in the description of the various described embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various described embodiments and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the term “and/or” as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. It will be further understood that the terms “includes,” “including,” “comprises,” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. 
     The term “if” is, optionally, construed to mean “when” or “upon” or “in response to determining” or “in response to detecting,” depending on the context. Similarly, the phrase “if it is determined” or “if [a stated condition or event] is detected” is, optionally, construed to mean “upon determining” or “in response to determining” or “upon detecting [the stated condition or event]” or “in response to detecting [the stated condition or event],” depending on the context. 
     Embodiments of electronic devices, user interfaces for such devices, and associated processes for using such devices are described. In some embodiments, the device is a portable communications device, such as a mobile telephone, that also contains other functions, such as PDA and/or music player functions. Exemplary embodiments of portable multifunction devices include, without limitation, the iPhone®, iPod Touch®, and iPad® devices from Apple Inc. of Cupertino, Calif. Other portable electronic devices, such as laptops or tablet computers with touch-sensitive surfaces (e.g., touch screen displays and/or touchpads), are, optionally, used. It should also be understood that, in some embodiments, the device is not a portable communications device, but is a desktop computer with a touch-sensitive surface (e.g., a touch screen display and/or a touchpad). 
     In the discussion that follows, an electronic device that includes a display and a touch-sensitive surface is described. It should be understood, however, that the electronic device optionally includes one or more other physical user-interface devices, such as button(s), a physical keyboard, a mouse, and/or a joystick. 
     The device typically supports a variety of applications, such as one or more of the following: a drawing application, a presentation application, a word processing application, a website creation application, a disk authoring application, a spreadsheet application, a gaming application, a telephone application, a video conferencing application, an e-mail application, an instant messaging application, a workout support application, a photo management application, a digital camera application, a digital video camera application, a web browsing application, a digital music player application, and/or a digital video player application. 
     The various applications that are executed on the device optionally use at least one common physical user-interface device, such as the touch-sensitive surface. One or more functions of the touch-sensitive surface as well as corresponding information displayed on the device are, optionally, adjusted and/or varied from one application to the next and/or within a respective application. In this way, a common physical architecture (such as the touch-sensitive surface) of the device optionally supports the variety of applications with user interfaces that are intuitive and transparent to the user. 
     Attention is now directed toward embodiments of portable devices with touch-sensitive displays.  FIG. 1A  is a block diagram illustrating portable multifunction device  100  with touch-sensitive display system  112  in accordance with some embodiments. Touch-sensitive display  112  is sometimes called a “touch screen” for convenience, and is sometimes known as or called a “touch-sensitive display system.” Device  100  includes memory  102  (which optionally includes one or more computer-readable storage mediums), memory controller  122 , one or more processing units (CPUs)  120 , peripherals interface  118 , RF circuitry  108 , audio circuitry  110 , speaker  111 , microphone  113 , input/output (I/O) subsystem  106 , other input or control devices  116 , and external port  124 . In some embodiments, microphone  113  has at least two microphones to support the performance of certain DSP functions. Device  100  optionally includes one or more optical sensors  164 . Device  100  optionally includes one or more contact intensity sensors  165  for detecting intensity of contacts on device  100  (e.g., a touch-sensitive surface such as touch-sensitive display system  112  of device  100 ). Device  100  optionally includes one or more tactile output generators  167  for generating tactile outputs on device  100  (e.g., generating tactile outputs on a touch-sensitive surface such as touch-sensitive display system  112  of device  100  or touchpad  355  of device  300 ). These components optionally communicate over one or more communication buses or signal lines  103 . 
     As used in the specification and claims, the term “intensity” of a contact on a touch-sensitive surface refers to the force or pressure (force per unit area) of a contact (e.g., a finger contact) on the touch-sensitive surface, or to a substitute (proxy) for the force or pressure of a contact on the touch-sensitive surface. The intensity of a contact has a range of values that includes at least four distinct values and more typically includes hundreds of distinct values (e.g., at least 256). Intensity of a contact is, optionally, determined (or measured) using various approaches and various sensors or combinations of sensors. For example, one or more force sensors underneath or adjacent to the touch-sensitive surface are, optionally, used to measure force at various points on the touch-sensitive surface. In some implementations, force measurements from multiple force sensors are combined (e.g., a weighted average) to determine an estimated force of a contact. Similarly, a pressure-sensitive tip of a stylus is, optionally, used to determine a pressure of the stylus on the touch-sensitive surface. Alternatively, the size of the contact area detected on the touch-sensitive surface and/or changes thereto, the capacitance of the touch-sensitive surface proximate to the contact and/or changes thereto, and/or the resistance of the touch-sensitive surface proximate to the contact and/or changes thereto are, optionally, used as a substitute for the force or pressure of the contact on the touch-sensitive surface. In some implementations, the substitute measurements for contact force or pressure are used directly to determine whether an intensity threshold has been exceeded (e.g., the intensity threshold is described in units corresponding to the substitute measurements). In some implementations, the substitute measurements for contact force or pressure are converted to an estimated force or pressure and the estimated force or pressure is used to determine whether an intensity threshold has been exceeded (e.g., the intensity threshold is a pressure threshold measured in units of pressure). Using the intensity of a contact as an attribute of a user input allows for user access to additional device functionality that may otherwise not be accessible by the user on a reduced-size device with limited real estate for displaying affordances (e.g., on a touch-sensitive display) and/or receiving user input (e.g., via a touch-sensitive display, a touch-sensitive surface, or a physical/mechanical control such as a knob or a button). 
     As used in the specification and claims, the term “tactile output” refers to physical displacement of a device relative to a previous position of the device, physical displacement of a component (e.g., a touch-sensitive surface) of a device relative to another component (e.g., housing) of the device, or displacement of the component relative to a center of mass of the device that will be detected by a user with the user&#39;s sense of touch. For example, in situations where the device or the component of the device is in contact with a surface of a user that is sensitive to touch (e.g., a finger, palm, or other part of a user&#39;s hand), the tactile output generated by the physical displacement will be interpreted by the user as a tactile sensation corresponding to a perceived change in physical characteristics of the device or the component of the device. For example, movement of a touch-sensitive surface (e.g., a touch-sensitive display or trackpad) is, optionally, interpreted by the user as a “down click” or “up click” of a physical actuator button. In some cases, a user will feel a tactile sensation such as an “down click” or “up click” even when there is no movement of a physical actuator button associated with the touch-sensitive surface that is physically pressed (e.g., displaced) by the user&#39;s movements. As another example, movement of the touch-sensitive surface is, optionally, interpreted or sensed by the user as “roughness” of the touch-sensitive surface, even when there is no change in smoothness of the touch-sensitive surface. While such interpretations of touch by a user will be subject to the individualized sensory perceptions of the user, there are many sensory perceptions of touch that are common to a large majority of users. Thus, when a tactile output is described as corresponding to a particular sensory perception of a user (e.g., an “up click,” a “down click,” “roughness”), unless otherwise stated, the generated tactile output corresponds to physical displacement of the device or a component thereof that will generate the described sensory perception for a typical (or average) user. 
     It should be appreciated that device  100  is only one example of a portable multifunction device, and that device  100  optionally has more or fewer components than shown, optionally combines two or more components, or optionally has a different configuration or arrangement of the components. The various components shown in  FIG. 1A  are implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and/or application-specific integrated circuits. 
     Memory  102  optionally includes high-speed random access memory and optionally also includes non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Memory controller  122  optionally controls access to memory  102  by other components of device  100 . 
     Peripherals interface  118  can be used to couple input and output peripherals of the device to CPU  120  and memory  102 . The one or more processors  120  run or execute various software programs and/or sets of instructions stored in memory  102  to perform various functions for device  100  and to process data. In some embodiments, peripherals interface  118 , CPU  120 , and memory controller  122  are, optionally, implemented on a single chip, such as chip  104 . In some other embodiments, they are, optionally, implemented on separate chips. 
     RF (radio frequency) circuitry  108  receives and sends RF signals, also called electromagnetic signals. RF circuitry  108  converts electrical signals to/from electromagnetic signals and communicates with communications networks and other communications devices via the electromagnetic signals. RF circuitry  108  optionally includes well-known circuitry for performing these functions, including but not limited to an antenna system, an RF transceiver, one or more amplifiers, a tuner, one or more oscillators, a digital signal processor, a CODEC chipset, a subscriber identity module (SIM) card, memory, and so forth. RF circuitry  108  optionally communicates with networks, such as the Internet, also referred to as the World Wide Web (WWW), an intranet and/or a wireless network, such as a cellular telephone network, a wireless local area network (LAN) and/or a metropolitan area network (MAN), and other devices by wireless communication. The RF circuitry  108  optionally includes well-known circuitry for detecting near field communication (NFC) fields, such as by a short-range communication radio. The wireless communication optionally uses any of a plurality of communications standards, protocols, and technologies, including but not limited to Global System for Mobile Communications (GSM), Enhanced Data GSM Environment (EDGE), high-speed downlink packet access (HSDPA), high-speed uplink packet access (HSUPA), Evolution, Data-Only (EV-DO), HSPA, HSPA+, Dual-Cell HSPA (DC-HSPDA), long term evolution (LTE), near field communication (NFC), wideband code division multiple access (W-CDMA), code division multiple access (CDMA), time division multiple access (TDMA), Bluetooth, Bluetooth Low Energy (BTLE), Wireless Fidelity (Wi-Fi) (e.g., IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, and/or IEEE 802.11ac), voice over Internet Protocol (VoIP), Wi-MAX, a protocol for e-mail (e.g., Internet message access protocol (IMAP) and/or post office protocol (POP)), instant messaging (e.g., extensible messaging and presence protocol (XMPP), Session Initiation Protocol for Instant Messaging and Presence Leveraging Extensions (SIMPLE), Instant Messaging and Presence Service (IMPS)), and/or Short Message Service (SMS), or any other suitable communication protocol, including communication protocols not yet developed as of the filing date of this document. 
     Audio circuitry  110 , speaker  111 , and microphone  113  provide an audio interface between a user and device  100 . Audio circuitry  110  receives audio data from peripherals interface  118 , converts the audio data to an electrical signal, and transmits the electrical signal to speaker  111 . Speaker  111  converts the electrical signal to human-audible sound waves. Audio circuitry  110  also receives electrical signals converted by microphone  113  from sound waves. Audio circuitry  110  converts the electrical signal to audio data and transmits the audio data to peripherals interface  118  for processing. Audio data is, optionally, retrieved from and/or transmitted to memory  102  and/or RF circuitry  108  by peripherals interface  118 . In some embodiments, audio circuitry  110  also includes a headset jack (e.g.,  212 ,  FIGS. 2A-2B ). The headset jack provides an interface between audio circuitry  110  and removable audio input/output peripherals, such as output-only headphones or a headset with both output (e.g., a headphone for one or both ears) and input (e.g., a microphone). 
     I/O subsystem  106  couples input/output peripherals on device  100 , such as touch screen  112  and other input control devices  116 , to peripherals interface  118 . I/O subsystem  106  optionally includes display controller  156 , optical sensor(s) controller  158 , intensity sensor controller  159 , haptic feedback controller  161 , and one or more input controllers  160  for other input or control devices. The one or more input controllers  160  receive/send electrical signals from/to other input or control devices  116 . The other input control devices  116  optionally include physical buttons (e.g., push buttons, rocker buttons, etc.), dials, slider switches, joysticks, click wheels, and so forth. In some alternate embodiments, input controller(s)  160  are, optionally, coupled to any (or none) of the following: a keyboard, an infrared port, a USB port, and a pointer device such as a mouse. The one or more buttons (e.g.,  208 ,  FIGS. 2A-2B ) optionally include an up/down button for volume control of speaker  111  and/or microphone  113 . The one or more buttons optionally include a push button (e.g.,  206 ,  FIGS. 2A and 2B ). 
     A quick press of the push button optionally disengages a lock of touch screen  112  or optionally begins a process that uses gestures on the touch screen to unlock the device, as described in U.S. patent application Ser. No. 11/322,549, “Unlocking a Device by Performing Gestures on an Unlock Image,” filed Dec. 23, 2005, U.S. Pat. No. 7,657,849, which is hereby incorporated by reference in its entirety. A longer press of the push button (e.g.,  206 ) optionally turns power to device  100  on or off. The functionality of one or more of the buttons are, optionally, user-customizable. Touch screen  112  is used to implement virtual or soft buttons and one or more soft keyboards. 
     Touch-sensitive display  112  provides an input interface and an output interface between the device and a user. Display controller  156  receives and/or sends electrical signals from/to touch screen  112 . Touch screen  112  displays visual output to the user. The visual output optionally includes graphics, text, icons, video, and any combination thereof (collectively termed “graphics”). In some embodiments, some or all of the visual output optionally corresponds to user-interface objects. 
     Touch screen  112  has a touch-sensitive surface, sensor, or set of sensors that accepts input from the user based on haptic and/or tactile contact. Touch screen  112  and display controller  156  (along with any associated modules and/or sets of instructions in memory  102 ) detect contact (and any movement or breaking of the contact) on touch screen  112  and convert the detected contact into interaction with user-interface objects (e.g., one or more soft keys, icons, web pages, or images) that are displayed on touch screen  112 . In an exemplary embodiment, a point of contact between touch screen  112  and the user corresponds to a finger of the user. 
     Touch screen  112  optionally uses LCD (liquid crystal display) technology, LPD (light emitting polymer display) technology, or LED (light emitting diode) technology, although other display technologies are used in other embodiments. Touch screen  112  and display controller  156  optionally detect contact and any movement or breaking thereof using any of a plurality of touch sensing technologies now known or later developed, including but not limited to capacitive, resistive, infrared, and surface acoustic wave technologies, as well as other proximity sensor arrays or other elements for determining one or more points of contact with touch screen  112 . In an exemplary embodiment, projected mutual capacitance sensing technology is used, such as that found in the iPhone® and iPod Touch® from Apple Inc. of Cupertino, Calif. 
     A touch-sensitive display in some embodiments of touch screen  112  is, optionally, analogous to the multi-touch sensitive touchpads described in the following U.S. Pat. No. 6,323,846 (Westerman et al.), U.S. Pat. No. 6,570,557 (Westerman et al.), and/or U.S. Pat. No. 6,677,932 (Westerman), and/or U.S. Patent Publication 2002/0015024A1, each of which is hereby incorporated by reference in its entirety. However, touch screen  112  displays visual output from device  100 , whereas touch-sensitive touchpads do not provide visual output. 
     A touch-sensitive display in some embodiments of touch screen  112  is described in the following applications: (1) U.S. patent application Ser. No. 11/381,313, “Multipoint Touch Surface Controller,” filed May 2, 2006; (2) U.S. patent application Ser. No. 10/840,862, “Multipoint Touchscreen,” filed May 6, 2004; (3) U.S. patent application Ser. No. 10/903,964, “Gestures For Touch Sensitive Input Devices,” filed Jul. 30, 2004; (4) U.S. patent application Ser. No. 11/048,264, “Gestures For Touch Sensitive Input Devices,” filed Jan. 31, 2005; (5) U.S. patent application Ser. No. 11/038,590, “Mode-Based Graphical User Interfaces For Touch Sensitive Input Devices,” filed Jan. 18, 2005; (6) U.S. patent application Ser. No. 11/228,758, “Virtual Input Device Placement On A Touch Screen User Interface,” filed Sep. 16, 2005; (7) U.S. patent application Ser. No. 11/228,700, “Operation Of A Computer With A Touch Screen Interface,” filed Sep. 16, 2005; (8) U.S. patent application Ser. No. 11/228,737, “Activating Virtual Keys Of A Touch-Screen Virtual Keyboard,” filed Sep. 16, 2005; and (9) U.S. patent application Ser. No. 11/367,749, “Multi-Functional Hand-Held Device,” filed Mar. 3, 2006. All of these applications are incorporated by reference herein in their entirety. 
     Touch screen  112  optionally has a video resolution in excess of 100 dpi. In some embodiments, the touch screen has a video resolution of approximately 160 dpi. The user optionally makes contact with touch screen  112  using any suitable object or appendage, such as a stylus, a finger, and so forth. In some embodiments, the user interface is designed to work primarily with finger-based contacts and gestures, which can be less precise than stylus-based input due to the larger area of contact of a finger on the touch screen. In some embodiments, the device translates the rough finger-based input into a precise pointer/cursor position or command for performing the actions desired by the user. 
     In some embodiments, in addition to the touch screen, device  100  optionally includes a touchpad (not shown) for activating or deactivating particular functions. In some embodiments, the touchpad is a touch-sensitive area of the device that, unlike the touch screen, does not display visual output. The touchpad is, optionally, a touch-sensitive surface that is separate from touch screen  112  or an extension of the touch-sensitive surface formed by the touch screen. 
     Device  100  also includes power system  162  for powering the various components. Power system  162  optionally includes a power management system, one or more power sources (e.g., battery, alternating current (AC)), a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator (e.g., a light-emitting diode (LED)) and any other components associated with the generation, management and distribution of power in portable devices. 
     Device  100  optionally also includes one or more optical sensors  164 .  FIGS. 1A and 1B  show an optical sensor coupled to optical sensor controller  158  in I/O subsystem  106 . Optical sensor  164  optionally includes charge-coupled device (CCD) or complementary metal-oxide semiconductor (CMOS) phototransistors. Optical sensor  164  receives light from the environment, projected through one or more lenses, and converts the light to data representing an image. In conjunction with imaging module  143  (also called a camera module), optical sensor  164  optionally captures still images or video. 
     The term “camera” is used herein as encompassing an optical system that is formed by an optical sensor (e.g.,  164 ) and one or more lenses through which light is projected to reach the optical sensor (and optionally, other related components). Such an optical system—a camera—can have a fixed focal length, meaning that the focal length, field of view, and optical magnification properties (if any) of the optical system is fixed, among other things. Cameras having a fixed focus length may also be described as having a prime lens. Or, a camera can have a variable focal length, meaning that the optical magnification properties of the optical system can change, such as by changing the position of one or more lenses with respect to the optical sensor within an optical train of the optical system. In some embodiments, device  100  has an optical sensor and corresponding lens(es) that form a camera of fixed focal length. In some embodiments, device  100  has an optical sensor and corresponding lens(es) that form a camera of variable focal length. 
     Moreover, device  100  can have one or more cameras of either design. In some embodiments, device  100  has two or more cameras located on a surface, for example, on its back, opposite touch screen display  112  on the front of the device, so that the touch screen display is enabled for use as a viewfinder for still and/or video image acquisition. In some embodiments, device  100  has two or more cameras located on its front, so that the user&#39;s image is, optionally, obtained for video conferencing while the user views the other video conference participants on the touch screen display. In some embodiments, the position of optical sensor  164  can be changed by the user (e.g., by rotating the lens and the sensor in the device housing) so that a single optical sensor  164  is used along with the touch screen display for both video conferencing and still and/or video image acquisition. 
     When two or more cameras are located on a surface of device  100 , the optical axes of the cameras is, optionally, arranged such that they are parallel. Put another way, the cameras capture overlapping fields of view, for example, at least 50%, at least 90%, or more, in various embodiments. The cameras preferably have different focal lengths, meaning that one camera is of a wider-angle design—has a wider field of view but lower optical magnification—while another camera is of a higher-magnification design—has a narrower field of view but higher native optical magnification. 
     Device  100  optionally also includes one or more contact intensity sensors  165 .  FIG. 1A  shows a contact intensity sensor coupled to intensity sensor controller  159  in I/O subsystem  106 . Contact intensity sensor  165  optionally includes one or more piezoresistive strain gauges, capacitive force sensors, electric force sensors, piezoelectric force sensors, optical force sensors, capacitive touch-sensitive surfaces, or other intensity sensors (e.g., sensors used to measure the force (or pressure) of a contact on a touch-sensitive surface). Contact intensity sensor  165  receives contact intensity information (e.g., pressure information or a proxy for pressure information) from the environment. In some embodiments, at least one contact intensity sensor is collocated with, or proximate to, a touch-sensitive surface (e.g., touch-sensitive display system  112 ). In some embodiments, at least one contact intensity sensor is located on the back of device  100 , opposite touch screen display  112 , which is located on the front of device  100 . 
     Device  100  optionally also includes one or more proximity sensors  166 .  FIGS. 1A and 1B  show proximity sensor  166  coupled to peripherals interface  118 . Alternately, proximity sensor  166  is, optionally, coupled to input controller  160  in I/O subsystem  106 . Proximity sensor  166  optionally performs as described in U.S. patent application Ser. No. 11/241,839, “Proximity Detector In Handheld Device”; Ser. No. 11/240,788, “Proximity Detector In Handheld Device”; Ser. No. 11/620,702, “Using Ambient Light Sensor To Augment Proximity Sensor Output”; Ser. No. 11/586,862, “Automated Response To And Sensing Of User Activity In Portable Devices”; and Ser. No. 11/638,251, “Methods And Systems For Automatic Configuration Of Peripherals,” which are hereby incorporated by reference in their entirety. In some embodiments, the proximity sensor turns off and disables touch screen  112  when the multifunction device is placed near the user&#39;s ear (e.g., when the user is making a phone call). 
     Device  100  optionally also includes one or more tactile output generators  167 .  FIG. 1A  shows a tactile output generator coupled to haptic feedback controller  161  in I/O subsystem  106 . Tactile output generator  167  optionally includes one or more electroacoustic devices such as speakers or other audio components and/or electromechanical devices that convert energy into linear motion, such as a motor, solenoid, electroactive polymer, piezoelectric actuator, electrostatic actuator, or other tactile output generating component (e.g., a component that converts electrical signals into tactile outputs on the device). Contact intensity sensor  165  receives tactile feedback generation instructions from haptic feedback module  133  and generates tactile outputs on device  100  that are capable of being sensed by a user of device  100 . In some embodiments, at least one tactile output generator is collocated with, or proximate to, a touch-sensitive surface (e.g., touch-sensitive display system  112 ) and, optionally, generates a tactile output by moving the touch-sensitive surface vertically (e.g., in/out of a surface of device  100 ) or laterally (e.g., back and forth in the same plane as a surface of device  100 ). In some embodiments, at least one tactile output generator sensor is located on the back of device  100 , opposite touch screen display  112 , which is located on the front of device  100 . 
     Device  100  optionally also includes one or more accelerometers  168 .  FIGS. 1A and 1B  show accelerometer  168  coupled to peripherals interface  118 . Alternately, accelerometer  168  is, optionally, coupled to an input controller  160  in I/O subsystem  106 . Accelerometer  168  optionally performs as described in U.S. Patent Publication No. 20050190059, “Acceleration-based Theft Detection System for Portable Electronic Devices,” and U.S. Patent Publication No. 20060017692, “Methods And Apparatuses For Operating A Portable Device Based On An Accelerometer,” both of which are incorporated by reference herein in their entirety. In some embodiments, information is displayed on the touch screen display in a portrait view or a landscape view based on an analysis of data received from the one or more accelerometers. Device  100  optionally includes, in addition to accelerometer(s)  168 , a magnetometer (not shown) and a GPS (or GLONASS or other global navigation system) receiver (not shown) for obtaining information concerning the location and orientation (e.g., portrait or landscape) of device  100 . 
     In some embodiments, the software components stored in memory  102  include operating system  126 , communication module (or set of instructions)  128 , contact/motion module (or set of instructions)  130 , graphics module (or set of instructions)  132 , text input module (or set of instructions)  134 , Global Positioning System (GPS) module (or set of instructions)  135 , and applications (or sets of instructions)  136 . Furthermore, in some embodiments, memory  102  ( FIG. 1A ) or  370  ( FIG. 3 ) stores device/global internal state  157 , as shown in  FIGS. 1A, 1B and 3 . Device/global internal state  157  includes one or more of: active application state, indicating which applications, if any, are currently active; display state, indicating what applications, views or other information occupy various regions of touch screen display  112 ; sensor state, including information obtained from the device&#39;s various sensors and input control devices  116 ; and location information concerning the device&#39;s location and/or attitude. 
     Operating system  126  (e.g., Darwin, RTXC, LINUX, UNIX, OS X, iOS, WINDOWS, or an embedded operating system such as VxWorks) includes various software components and/or drivers for controlling and managing general system tasks (e.g., memory management, storage device control, power management, etc.) and facilitates communication between various hardware and software components. 
     Communication module  128  facilitates communication with other devices over one or more external ports  124  and also includes various software components for handling data received by RF circuitry  108  and/or external port  124 . External port  124  (e.g., Universal Serial Bus (USB), FIREWIRE, etc.) is adapted for coupling directly to other devices or indirectly over a network (e.g., the Internet, wireless LAN, etc.). In some embodiments, the external port is a multi-pin (e.g., 8-pin, 30-pin) connector that is the same as, or similar to and/or compatible with, the 30-pin connector used on iPod® (trademark of Apple Inc.) devices. 
     Contact/motion module  130  optionally detects contact with touch screen  112  (in conjunction with display controller  156 ) and other touch-sensitive devices (e.g., a touchpad or physical click wheel). Contact/motion module  130  includes various software components for performing various operations related to detection of contact, such as determining if contact has occurred (e.g., detecting a finger-down event), determining an intensity of the contact (e.g., the force or pressure of the contact or a substitute for the force or pressure of the contact), determining if there is movement of the contact and tracking the movement across the touch-sensitive surface (e.g., detecting one or more finger-dragging events), and determining if the contact has ceased (e.g., detecting a finger-up event or a break in contact). Contact/motion module  130  receives contact data from the touch-sensitive surface. Determining movement of the point of contact, which is represented by a series of contact data, optionally includes determining speed (magnitude), velocity (magnitude and direction), and/or an acceleration (a change in magnitude and/or direction) of the point of contact. These operations are, optionally, applied to single contacts (e.g., one finger contacts) or to multiple simultaneous contacts (e.g., “multitouch”/multiple finger contacts). In some embodiments, contact/motion module  130  and display controller  156  detect contact on a touchpad. 
     In some embodiments, contact/motion module  130  uses a set of one or more intensity thresholds to determine whether an operation has been performed by a user (e.g., to determine whether a user has “clicked” on an icon). In some embodiments, at least a subset of the intensity thresholds are determined in accordance with software parameters (e.g., the intensity thresholds are not determined by the activation thresholds of particular physical actuators and can be adjusted without changing the physical hardware of device  100 ). For example, a mouse “click” threshold of a trackpad or touch screen display can be set to any of a large range of predefined threshold values without changing the trackpad or touch screen display hardware. Additionally, in some implementations, a user of the device is provided with software settings for adjusting one or more of the set of intensity thresholds (e.g., by adjusting individual intensity thresholds and/or by adjusting a plurality of intensity thresholds at once with a system-level click “intensity” parameter). 
     Contact/motion module  130  optionally detects a gesture input by a user. Different gestures on the touch-sensitive surface have different contact patterns (e.g., different motions, timings, and/or intensities of detected contacts). Thus, a gesture is, optionally, detected by detecting a particular contact pattern. For example, detecting a finger tap gesture includes detecting a finger-down event followed by detecting a finger-up (liftoff) event at the same position (or substantially the same position) as the finger-down event (e.g., at the position of an icon). As another example, detecting a finger swipe gesture on the touch-sensitive surface includes detecting a finger-down event followed by detecting one or more finger-dragging events, and subsequently followed by detecting a finger-up (liftoff) event. 
     Graphics module  132  includes various known software components for rendering and displaying graphics on touch screen  112  or other display, including components for changing the visual impact (e.g., brightness, transparency, saturation, contrast or other visual property) of graphics that are displayed. As used herein, the term “graphics” includes any object that can be displayed to a user, including, without limitation text, web pages, icons (such as user-interface objects including soft keys), digital images, videos, animations, and the like. 
     In some embodiments, graphics module  132  stores data representing graphics to be used. Each graphic is, optionally, assigned a corresponding code. Graphics module  132  receives, from applications etc., one or more codes specifying graphics to be displayed along with, if necessary, coordinate data and other graphic property data, and then generates screen image data to output to display controller  156 . 
     Haptic feedback module  133  includes various software components for generating instructions used by tactile output generator(s)  167  to produce tactile outputs at one or more locations on device  100  in response to user interactions with device  100 . 
     Text input module  134 , which is, optionally, a component of graphics module  132 , provides soft keyboards for entering text in various applications (e.g., contacts  137 , e-mail  140 , IM  141 , browser  147 , and any other application that needs text input). 
     GPS module  135  determines the location of the device and provides this information for use in various applications (e.g., to telephone  138  for use in location-based dialing; to camera  143  as picture/video metadata; and to applications that provide location-based services such as weather widgets, local yellow page widgets, and map/navigation widgets). 
     Applications  136  optionally include the following modules (or sets of instructions), or a subset or superset thereof:
         Contacts module  137  (sometimes called an address book or contact list);   Telephone module  138 ;   Video conference module  139 ;   E-mail client module  140 ;   Instant messaging (IM) module  141 ;   Workout support module  142 ;   Camera module  143  for still and/or video images;   Image management module  144 ;   Video player module;   Music player module;   Browser module  147 ;   Calendar module  148 ;   Widget modules  149 , which optionally include one or more of: weather widget  149 - 1 , stocks widget  149 - 2 , calculator widget  149 - 3 , alarm clock widget  149 - 4 , dictionary widget  149 - 5 , and other widgets obtained by the user, as well as user-created widgets  149 - 6 ;   Widget creator module  150  for making user-created widgets  149 - 6 ;   Search module  151 ;   Video and music player module  152 , which merges video player module and music player module;   Notes module  153 ;   Map module  154 ; and/or   Online video module  155 .       

     Examples of other applications  136  that are, optionally, stored in memory  102  include other word processing applications, other image editing applications, drawing applications, presentation applications, JAVA-enabled applications, encryption, digital rights management, voice recognition, and voice replication. 
     In conjunction with touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , contacts module  137  are, optionally, used to manage an address book or contact list (e.g., stored in application internal state  192  of contacts module  137  in memory  102  or memory  370 ), including: adding name(s) to the address book; deleting name(s) from the address book; associating telephone number(s), e-mail address(es), physical address(es) or other information with a name; associating an image with a name; categorizing and sorting names; providing telephone numbers or e-mail addresses to initiate and/or facilitate communications by telephone  138 , video conference module  139 , e-mail  140 , or IM  141 ; and so forth. 
     In conjunction with RF circuitry  108 , audio circuitry  110 , speaker  111 , microphone  113 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , telephone module  138  are, optionally, used to enter a sequence of characters corresponding to a telephone number, access one or more telephone numbers in contacts module  137 , modify a telephone number that has been entered, dial a respective telephone number, conduct a conversation, and disconnect or hang up when the conversation is completed. As noted above, the wireless communication optionally uses any of a plurality of communications standards, protocols, and technologies. 
     In conjunction with RF circuitry  108 , audio circuitry  110 , speaker  111 , microphone  113 , touch screen  112 , display controller  156 , optical sensor  164 , optical sensor controller  158 , contact/motion module  130 , graphics module  132 , text input module  134 , contacts module  137 , and telephone module  138 , video conference module  139  includes executable instructions to initiate, conduct, and terminate a video conference between a user and one or more other participants in accordance with user instructions. 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , e-mail client module  140  includes executable instructions to create, send, receive, and manage e-mail in response to user instructions. In conjunction with image management module  144 , e-mail client module  140  makes it very easy to create and send e-mails with still or video images taken with camera module  143 . 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , the instant messaging module  141  includes executable instructions to enter a sequence of characters corresponding to an instant message, to modify previously entered characters, to transmit a respective instant message (for example, using a Short Message Service (SMS) or Multimedia Message Service (MMS) protocol for telephony-based instant messages or using XMPP, SIMPLE, or IMPS for Internet-based instant messages), to receive instant messages, and to view received instant messages. In some embodiments, transmitted and/or received instant messages optionally include graphics, photos, audio files, video files and/or other attachments as are supported in an MMS and/or an Enhanced Messaging Service (EMS). As used herein, “instant messaging” refers to both telephony-based messages (e.g., messages sent using SMS or MMS) and Internet-based messages (e.g., messages sent using XMPP, SIMPLE, or IMPS). 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , text input module  134 , GPS module  135 , map module  154 , and music player module, workout support module  142  includes executable instructions to create workouts (e.g., with time, distance, and/or calorie burning goals); communicate with workout sensors (sports devices); receive workout sensor data; calibrate sensors used to monitor a workout; select and play music for a workout; and display, store, and transmit workout data. 
     In conjunction with touch screen  112 , display controller  156 , optical sensor(s)  164 , optical sensor controller  158 , contact/motion module  130 , graphics module  132 , and image management module  144 , camera module  143  includes executable instructions to capture still images or video (including a video stream) and store them into memory  102 , modify characteristics of a still image or video, or delete a still image or video from memory  102 . 
     In conjunction with touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , text input module  134 , and camera module  143 , image management module  144  includes executable instructions to arrange, modify (e.g., edit), or otherwise manipulate, label, delete, present (e.g., in a digital slide show or album), and store still and/or video images. 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , browser module  147  includes executable instructions to browse the Internet in accordance with user instructions, including searching, linking to, receiving, and displaying web pages or portions thereof, as well as attachments and other files linked to web pages. 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , text input module  134 , e-mail client module  140 , and browser module  147 , calendar module  148  includes executable instructions to create, display, modify, and store calendars and data associated with calendars (e.g., calendar entries, to-do lists, etc.) in accordance with user instructions. 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , text input module  134 , and browser module  147 , widget modules  149  are mini-applications that are, optionally, downloaded and used by a user (e.g., weather widget  149 - 1 , stocks widget  149 - 2 , calculator widget  149 - 3 , alarm clock widget  149 - 4 , and dictionary widget  149 - 5 ) or created by the user (e.g., user-created widget  149 - 6 ). In some embodiments, a widget includes an HTML (Hypertext Markup Language) file, a CSS (Cascading Style Sheets) file, and a JavaScript file. In some embodiments, a widget includes an XML (Extensible Markup Language) file and a JavaScript file (e.g., Yahoo! Widgets). 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , text input module  134 , and browser module  147 , the widget creator module  150  are, optionally, used by a user to create widgets (e.g., turning a user-specified portion of a web page into a widget). 
     In conjunction with touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , search module  151  includes executable instructions to search for text, music, sound, image, video, and/or other files in memory  102  that match one or more search criteria (e.g., one or more user-specified search terms) in accordance with user instructions. 
     In conjunction with touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , audio circuitry  110 , speaker  111 , RF circuitry  108 , and browser module  147 , video and music player module  152  includes executable instructions that allow the user to download and play back recorded music and other sound files stored in one or more file formats, such as MP3 or AAC files, and executable instructions to display, present, or otherwise play back videos (e.g., on touch screen  112  or on an external, connected display via external port  124 ). In some embodiments, device  100  optionally includes the functionality of an MP3 player, such as an iPod (trademark of Apple Inc.). 
     In conjunction with touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , notes module  153  includes executable instructions to create and manage notes, to-do lists, and the like in accordance with user instructions. 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , text input module  134 , GPS module  135 , and browser module  147 , map module  154  are, optionally, used to receive, display, modify, and store maps and data associated with maps (e.g., driving directions, data on stores and other points of interest at or near a particular location, and other location-based data) in accordance with user instructions. 
     In conjunction with touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , audio circuitry  110 , speaker  111 , RF circuitry  108 , text input module  134 , e-mail client module  140 , and browser module  147 , online video module  155  includes instructions that allow the user to access, browse, receive (e.g., by streaming and/or download), play back (e.g., on the touch screen or on an external, connected display via external port  124 ), send an e-mail with a link to a particular online video, and otherwise manage online videos in one or more file formats, such as H.264. In some embodiments, instant messaging module  141 , rather than e-mail client module  140 , is used to send a link to a particular online video. Additional description of the online video application can be found in U.S. Provisional Patent Application No. 60/936,562, “Portable Multifunction Device, Method, and Graphical User Interface for Playing Online Videos,” filed Jun. 20, 2007, and U.S. patent application Ser. No. 11/968,067, “Portable Multifunction Device, Method, and Graphical User Interface for Playing Online Videos,” filed Dec. 31, 2007, the contents of which are hereby incorporated by reference in their entirety. 
     Each of the above-identified modules and applications corresponds to a set of executable instructions for performing one or more functions described above and the methods described in this application (e.g., the computer-implemented methods and other information processing methods described herein). These modules (e.g., sets of instructions) need not be implemented as separate software programs, procedures, or modules, and thus various subsets of these modules are, optionally, combined or otherwise rearranged in various embodiments. For example, video player module is, optionally, combined with music player module into a single module (e.g., video and music player module  152 ,  FIG. 1A ). In some embodiments, memory  102  optionally stores a subset of the modules and data structures identified above. Furthermore, memory  102  optionally stores additional modules and data structures not described above. 
     In some embodiments, device  100  is a device where operation of a predefined set of functions on the device is performed exclusively through a touch screen and/or a touchpad. By using a touch screen and/or a touchpad as the primary input control device for operation of device  100 , the number of physical input control devices (such as push buttons, dials, and the like) on device  100  is, optionally, reduced. 
     The predefined set of functions that are performed exclusively through a touch screen and/or a touchpad optionally include navigation between user interfaces. In some embodiments, the touchpad, when touched by the user, navigates device  100  to a main, home, or root menu from any user interface that is displayed on device  100 . In such embodiments, a “menu button” is implemented using a touchpad. In some other embodiments, the menu button is a physical push button or other physical input control device instead of a touchpad. 
       FIG. 1B  is a block diagram illustrating exemplary components for event handling in accordance with some embodiments. In some embodiments, memory  102  ( FIG. 1A ) or  370  ( FIG. 3 ) includes event sorter  170  (e.g., in operating system  126 ) and a respective application  136 - 1  (e.g., any of the aforementioned applications  137 - 151 ,  155 ,  380 - 390 ). 
     Event sorter  170  receives event information and determines the application  136 - 1  and application view  191  of application  136 - 1  to which to deliver the event information. Event sorter  170  includes event monitor  171  and event dispatcher module  174 . In some embodiments, application  136 - 1  includes application internal state  192 , which indicates the current application view(s) displayed on touch-sensitive display  112  when the application is active or executing. In some embodiments, device/global internal state  157  is used by event sorter  170  to determine which application(s) is (are) currently active, and application internal state  192  is used by event sorter  170  to determine application views  191  to which to deliver event information. 
     In some embodiments, application internal state  192  includes additional information, such as one or more of: resume information to be used when application  136 - 1  resumes execution, user interface state information that indicates information being displayed or that is ready for display by application  136 - 1 , a state queue for enabling the user to go back to a prior state or view of application  136 - 1 , and a redo/undo queue of previous actions taken by the user. 
     Event monitor  171  receives event information from peripherals interface  118 . Event information includes information about a sub-event (e.g., a user touch on touch-sensitive display  112 , as part of a multi-touch gesture). Peripherals interface  118  transmits information it receives from I/O subsystem  106  or a sensor, such as proximity sensor  166 , accelerometer(s)  168 , and/or microphone  113  (through audio circuitry  110 ). Information that peripherals interface  118  receives from I/O subsystem  106  includes information from touch-sensitive display  112  or a touch-sensitive surface. 
     In some embodiments, event monitor  171  sends requests to the peripherals interface  118  at predetermined intervals. In response, peripherals interface  118  transmits event information. In other embodiments, peripherals interface  118  transmits event information only when there is a significant event (e.g., receiving an input above a predetermined noise threshold and/or for more than a predetermined duration). 
     In some embodiments, event sorter  170  also includes a hit view determination module  172  and/or an active event recognizer determination module  173 . 
     Hit view determination module  172  provides software procedures for determining where a sub-event has taken place within one or more views when touch-sensitive display  112  displays more than one view. Views are made up of controls and other elements that a user can see on the display. 
     Another aspect of the user interface associated with an application is a set of views, sometimes herein called application views or user interface windows, in which information is displayed and touch-based gestures occur. The application views (of a respective application) in which a touch is detected optionally correspond to programmatic levels within a programmatic or view hierarchy of the application. For example, the lowest level view in which a touch is detected is, optionally, called the hit view, and the set of events that are recognized as proper inputs are, optionally, determined based, at least in part, on the hit view of the initial touch that begins a touch-based gesture. 
     Hit view determination module  172  receives information related to sub-events of a touch-based gesture. When an application has multiple views organized in a hierarchy, hit view determination module  172  identifies a hit view as the lowest view in the hierarchy which should handle the sub-event. In most circumstances, the hit view is the lowest level view in which an initiating sub-event occurs (e.g., the first sub-event in the sequence of sub-events that form an event or potential event). Once the hit view is identified by the hit view determination module  172 , the hit view typically receives all sub-events related to the same touch or input source for which it was identified as the hit view. 
     Active event recognizer determination module  173  determines which view or views within a view hierarchy should receive a particular sequence of sub-events. In some embodiments, active event recognizer determination module  173  determines that only the hit view should receive a particular sequence of sub-events. In other embodiments, active event recognizer determination module  173  determines that all views that include the physical location of a sub-event are actively involved views, and therefore determines that all actively involved views should receive a particular sequence of sub-events. In other embodiments, even if touch sub-events were entirely confined to the area associated with one particular view, views higher in the hierarchy would still remain as actively involved views. 
     Event dispatcher module  174  dispatches the event information to an event recognizer (e.g., event recognizer  180 ). In embodiments including active event recognizer determination module  173 , event dispatcher module  174  delivers the event information to an event recognizer determined by active event recognizer determination module  173 . In some embodiments, event dispatcher module  174  stores in an event queue the event information, which is retrieved by a respective event receiver  182 . 
     In some embodiments, operating system  126  includes event sorter  170 . Alternatively, application  136 - 1  includes event sorter  170 . In yet other embodiments, event sorter  170  is a stand-alone module, or a part of another module stored in memory  102 , such as contact/motion module  130 . 
     In some embodiments, application  136 - 1  includes a plurality of event handlers  190  and one or more application views  191 , each of which includes instructions for handling touch events that occur within a respective view of the application&#39;s user interface. Each application view  191  of the application  136 - 1  includes one or more event recognizers  180 . Typically, a respective application view  191  includes a plurality of event recognizers  180 . In other embodiments, one or more of event recognizers  180  are part of a separate module, such as a user interface kit (not shown) or a higher level object from which application  136 - 1  inherits methods and other properties. In some embodiments, a respective event handler  190  includes one or more of: data updater  176 , object updater  177 , GUI updater  178 , and/or event data  179  received from event sorter  170 . Event handler  190  optionally utilizes or calls data updater  176 , object updater  177 , or GUI updater  178  to update the application internal state  192 . Alternatively, one or more of the application views  191  include one or more respective event handlers  190 . Also, in some embodiments, one or more of data updater  176 , object updater  177 , and GUI updater  178  are included in a respective application view  191 . 
     A respective event recognizer  180  receives event information (e.g., event data  179 ) from event sorter  170  and identifies an event from the event information. Event recognizer  180  includes event receiver  182  and event comparator  184 . In some embodiments, event recognizer  180  also includes at least a subset of: metadata  183 , and event delivery instructions  188  (which optionally include sub-event delivery instructions). 
     Event receiver  182  receives event information from event sorter  170 . The event information includes information about a sub-event, for example, a touch or a touch movement. Depending on the sub-event, the event information also includes additional information, such as location of the sub-event. When the sub-event concerns motion of a touch, the event information optionally also includes speed and direction of the sub-event. In some embodiments, events include rotation of the device from one orientation to another (e.g., from a portrait orientation to a landscape orientation, or vice versa), and the event information includes corresponding information about the current orientation (also called device attitude) of the device. 
     Event comparator  184  compares the event information to predefined event or sub-event definitions and, based on the comparison, determines an event or sub-event, or determines or updates the state of an event or sub-event. In some embodiments, event comparator  184  includes event definitions  186 . Event definitions  186  contain definitions of events (e.g., predefined sequences of sub-events), for example, event  1  ( 187 - 1 ), event  2  ( 187 - 2 ), and others. In some embodiments, sub-events in an event ( 187 ) include, for example, touch begin, touch end, touch movement, touch cancellation, and multiple touching. In one example, the definition for event  1  ( 187 - 1 ) is a double tap on a displayed object. The double tap, for example, comprises a first touch (touch begin) on the displayed object for a predetermined phase, a first liftoff (touch end) for a predetermined phase, a second touch (touch begin) on the displayed object for a predetermined phase, and a second liftoff (touch end) for a predetermined phase. In another example, the definition for event  2  ( 187 - 2 ) is a dragging on a displayed object. The dragging, for example, comprises a touch (or contact) on the displayed object for a predetermined phase, a movement of the touch across touch-sensitive display  112 , and liftoff of the touch (touch end). In some embodiments, the event also includes information for one or more associated event handlers  190 . 
     In some embodiments, event definition  187  includes a definition of an event for a respective user-interface object. In some embodiments, event comparator  184  performs a hit test to determine which user-interface object is associated with a sub-event. For example, in an application view in which three user-interface objects are displayed on touch-sensitive display  112 , when a touch is detected on touch-sensitive display  112 , event comparator  184  performs a hit test to determine which of the three user-interface objects is associated with the touch (sub-event). If each displayed object is associated with a respective event handler  190 , the event comparator uses the result of the hit test to determine which event handler  190  should be activated. For example, event comparator  184  selects an event handler associated with the sub-event and the object triggering the hit test. 
     In some embodiments, the definition for a respective event ( 187 ) also includes delayed actions that delay delivery of the event information until after it has been determined whether the sequence of sub-events does or does not correspond to the event recognizer&#39;s event type. 
     When a respective event recognizer  180  determines that the series of sub-events do not match any of the events in event definitions  186 , the respective event recognizer  180  enters an event impossible, event failed, or event ended state, after which it disregards subsequent sub-events of the touch-based gesture. In this situation, other event recognizers, if any, that remain active for the hit view continue to track and process sub-events of an ongoing touch-based gesture. 
     In some embodiments, a respective event recognizer  180  includes metadata  183  with configurable properties, flags, and/or lists that indicate how the event delivery system should perform sub-event delivery to actively involved event recognizers. In some embodiments, metadata  183  includes configurable properties, flags, and/or lists that indicate how event recognizers interact, or are enabled to interact, with one another. In some embodiments, metadata  183  includes configurable properties, flags, and/or lists that indicate whether sub-events are delivered to varying levels in the view or programmatic hierarchy. 
     In some embodiments, a respective event recognizer  180  activates event handler  190  associated with an event when one or more particular sub-events of an event are recognized. In some embodiments, a respective event recognizer  180  delivers event information associated with the event to event handler  190 . Activating an event handler  190  is distinct from sending (and deferred sending) sub-events to a respective hit view. In some embodiments, event recognizer  180  throws a flag associated with the recognized event, and event handler  190  associated with the flag catches the flag and performs a predefined process. 
     In some embodiments, event delivery instructions  188  include sub-event delivery instructions that deliver event information about a sub-event without activating an event handler. Instead, the sub-event delivery instructions deliver event information to event handlers associated with the series of sub-events or to actively involved views. Event handlers associated with the series of sub-events or with actively involved views receive the event information and perform a predetermined process. 
     In some embodiments, data updater  176  creates and updates data used in application  136 - 1 . For example, data updater  176  updates the telephone number used in contacts module  137 , or stores a video file used in video player module. In some embodiments, object updater  177  creates and updates objects used in application  136 - 1 . For example, object updater  177  creates a new user-interface object or updates the position of a user-interface object. GUI updater  178  updates the GUI. For example, GUI updater  178  prepares display information and sends it to graphics module  132  for display on a touch-sensitive display. 
     In some embodiments, event handler(s)  190  includes or has access to data updater  176 , object updater  177 , and GUI updater  178 . In some embodiments, data updater  176 , object updater  177 , and GUI updater  178  are included in a single module of a respective application  136 - 1  or application view  191 . In other embodiments, they are included in two or more software modules. 
     It shall be understood that the foregoing discussion regarding event handling of user touches on touch-sensitive displays also applies to other forms of user inputs to operate multifunction devices  100  with input devices, not all of which are initiated on touch screens. For example, mouse movement and mouse button presses, optionally coordinated with single or multiple keyboard presses or holds; contact movements such as taps, drags, scrolls, etc. on touchpads; pen stylus inputs; movement of the device; oral instructions; detected eye movements; biometric inputs; and/or any combination thereof are optionally utilized as inputs corresponding to sub-events which define an event to be recognized. 
       FIG. 2A  illustrates a portable multifunction device  100  having a touch screen  112  in accordance with some embodiments. The touch screen optionally displays one or more graphics within user interface (UI)  200 . In this embodiment, as well as others described below, a user is enabled to select one or more of the graphics by making a gesture on the graphics, for example, with one or more fingers  202  (not drawn to scale in the figure) or one or more styluses  203  (not drawn to scale in the figure). In some embodiments, selection of one or more graphics occurs when the user breaks contact with the one or more graphics. In some embodiments, the gesture optionally includes one or more taps, one or more swipes (from left to right, right to left, upward and/or downward), and/or a rolling of a finger (from right to left, left to right, upward and/or downward) that has made contact with device  100 . In some implementations or circumstances, inadvertent contact with a graphic does not select the graphic. For example, a swipe gesture that sweeps over an application icon optionally does not select the corresponding application when the gesture corresponding to selection is a tap. 
     Device  100  optionally also include one or more physical buttons, such as “home” or menu button  204 . As described previously, menu button  204  is, optionally, used to navigate to any application  136  in a set of applications that are, optionally, executed on device  100 . Alternatively, in some embodiments, the menu button is implemented as a soft key in a GUI displayed on touch screen  112 . 
     In some embodiments, device  100  includes touch screen  112 , menu button  204 , push button  206  for powering the device on/off and locking the device, volume adjustment button(s)  208 , subscriber identity module (SIM) card slot  210 , headset jack  212 , and docking/charging external port  124 . Push button  206  is, optionally, used to turn the power on/off on the device by depressing the button and holding the button in the depressed state for a predefined time interval; to lock the device by depressing the button and releasing the button before the predefined time interval has elapsed; and/or to unlock the device or initiate an unlock process. In an alternative embodiment, device  100  also accepts verbal input for activation or deactivation of some functions through microphone  113 . Device  100  also, optionally, includes one or more contact intensity sensors  165  for detecting intensity of contacts on touch screen  112  and/or one or more tactile output generators  167  for generating tactile outputs for a user of device  100 . 
       FIG. 2B  illustrates the side of portable multifunction device  100  opposite touch screen  112  in accordance with some embodiments. As can be seen, device  100  includes cameras  214  and  216 . Camera  214  is a wider-angle camera and camera  216  is a higher-magnification camera in some embodiments. While the cameras in  FIG. 2B  are shown on a side of portable multifunction device  100  that is opposite touch screen  112 , it should be understood that in principle, the cameras could be positioned on any side of the device (e.g., a same side as touch screen  112 ), or an edge of device  100 . 
       FIG. 3  is a block diagram of an exemplary multifunction device with a display and a touch-sensitive surface in accordance with some embodiments. Device  300  need not be portable. In some embodiments, device  300  is a laptop computer, a desktop computer, a tablet computer, a multimedia player device, a navigation device, an educational device (such as a child&#39;s learning toy), a gaming system, or a control device (e.g., a home or industrial controller). Device  300  typically includes one or more processing units (CPUs)  310 , one or more network or other communications interfaces  360 , memory  370 , and one or more communication buses  320  for interconnecting these components. Communication buses  320  optionally include circuitry (sometimes called a chipset) that interconnects and controls communications between system components. Device  300  includes input/output (I/O) interface  330  comprising display  340 , which is typically a touch screen display. I/O interface  330  also optionally includes a keyboard and/or mouse (or other pointing device)  350  and touchpad  355 , tactile output generator  357  for generating tactile outputs on device  300  (e.g., similar to tactile output generator(s)  167  described above with reference to  FIG. 1A ), sensors  359  (e.g., optical, acceleration, proximity, touch-sensitive, and/or contact intensity sensors similar to contact intensity sensor(s)  165  described above with reference to  FIG. 1A ). Memory  370  includes high-speed random access memory, such as DRAM, SRAM, DDR RAM, or other random access solid state memory devices; and optionally includes non-volatile memory, such as one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or other non-volatile solid state storage devices. Memory  370  optionally includes one or more storage devices remotely located from CPU(s)  310 . In some embodiments, memory  370  stores programs, modules, and data structures analogous to the programs, modules, and data structures stored in memory  102  of portable multifunction device  100  ( FIG. 1A ), or a subset thereof. Furthermore, memory  370  optionally stores additional programs, modules, and data structures not present in memory  102  of portable multifunction device  100 . For example, memory  370  of device  300  optionally stores drawing module  380 , presentation module  382 , word processing module  384 , website creation module  386 , disk authoring module  388 , and/or spreadsheet module  390 , while memory  102  of portable multifunction device  100  ( FIG. 1A ) optionally does not store these modules. 
     Each of the above-identified elements in  FIG. 3  is, optionally, stored in one or more of the previously mentioned memory devices. Each of the above-identified modules corresponds to a set of instructions for performing a function described above. The above-identified modules or programs (e.g., sets of instructions) need not be implemented as separate software programs, procedures, or modules, and thus various subsets of these modules are, optionally, combined or otherwise rearranged in various embodiments. In some embodiments, memory  370  optionally stores a subset of the modules and data structures identified above. Furthermore, memory  370  optionally stores additional modules and data structures not described above. 
     Attention is now directed towards embodiments of user interfaces that are, optionally, implemented on, for example, portable multifunction device  100 . 
       FIG. 4A  illustrates an exemplary user interface for a menu of applications on portable multifunction device  100  in accordance with some embodiments. Similar user interfaces are, optionally, implemented on device  300 . In some embodiments, user interface  400  includes the following elements, or a subset or superset thereof:
         Signal strength indicator(s)  402  for wireless communication(s), such as cellular and Wi-Fi signals;   Time  404 ;   Bluetooth indicator  405 ;   Battery status indicator  406 ;   Tray  408  with icons for frequently used applications, such as:
           Icon  416  for telephone module  138 , labeled “Phone,” which optionally includes an indicator  414  of the number of missed calls or voicemail messages;   Icon  418  for e-mail client module  140 , labeled “Mail,” which optionally includes an indicator  410  of the number of unread e-mails;   Icon  420  for browser module  147 , labeled “Browser;” and   Icon  422  for video and music player module  152 , also referred to as iPod (trademark of Apple Inc.) module  152 , labeled “iPod;” and   
           Icons for other applications, such as:
           Icon  424  for IM module  141 , labeled “Messages;”   Icon  426  for calendar module  148 , labeled “Calendar;”   Icon  428  for image management module  144 , labeled “Photos;”   Icon  430  for camera module  143 , labeled “Camera;”   Icon  432  for online video module  155 , labeled “Online Video;”   Icon  434  for stocks widget  149 - 2 , labeled “Stocks;”   Icon  436  for map module  154 , labeled “Maps;”   Icon  438  for weather widget  149 - 1 , labeled “Weather;”   Icon  440  for alarm clock widget  149 - 4 , labeled “Clock;”   Icon  442  for workout support module  142 , labeled “Workout Support;”   Icon  444  for notes module  153 , labeled “Notes;” and   Icon  446  for a settings application or module, labeled “Settings,” which provides access to settings for device  100  and its various applications  136 .   
               

     It should be noted that the icon labels illustrated in  FIG. 4A  are merely exemplary. For example, icon  422  for video and music player module  152  are labeled “Music” or “Music Player.” Other labels are, optionally, used for various application icons. In some embodiments, a label for a respective application icon includes a name of an application corresponding to the respective application icon. In some embodiments, a label for a particular application icon is distinct from a name of an application corresponding to the particular application icon. 
       FIG. 4B  illustrates an exemplary user interface on a device (e.g., device  300 ,  FIG. 3 ) with a touch-sensitive surface  451  (e.g., a tablet or touchpad  355 ,  FIG. 3 ) that is separate from the display  450  (e.g., touch screen display  112 ). Device  300  also, optionally, includes one or more contact intensity sensors (e.g., one or more of sensors  359 ) for detecting intensity of contacts on touch-sensitive surface  451  and/or one or more tactile output generators  357  for generating tactile outputs for a user of device  300 . 
     Although some of the examples that follow will be given with reference to inputs on touch screen display  112  (where the touch-sensitive surface and the display are combined), in some embodiments, the device detects inputs on a touch-sensitive surface that is separate from the display, as shown in  FIG. 4B . In some embodiments, the touch-sensitive surface (e.g.,  451  in  FIG. 4B ) has a primary axis (e.g.,  452  in  FIG. 4B ) that corresponds to a primary axis (e.g.,  453  in  FIG. 4B ) on the display (e.g.,  450 ). In accordance with these embodiments, the device detects contacts (e.g.,  460  and  462  in  FIG. 4B ) with the touch-sensitive surface  451  at locations that correspond to respective locations on the display (e.g., in  FIG. 4B, 460  corresponds to  468  and  462  corresponds to  470 ). In this way, user inputs (e.g., contacts  460  and  462 , and movements thereof) detected by the device on the touch-sensitive surface (e.g.,  451  in  FIG. 4B ) are used by the device to manipulate the user interface on the display (e.g.,  450  in  FIG. 4B ) of the multifunction device when the touch-sensitive surface is separate from the display. It should be understood that similar methods are, optionally, used for other user interfaces described herein. 
     Additionally, while the following examples are given primarily with reference to finger inputs (e.g., finger contacts, finger tap gestures, finger swipe gestures), it should be understood that, in some embodiments, one or more of the finger inputs are replaced with input from another input device (e.g., a mouse-based input or stylus input). For example, a swipe gesture is, optionally, replaced with a mouse click (e.g., instead of a contact) followed by movement of the cursor along the path of the swipe (e.g., instead of movement of the contact). As another example, a tap gesture is, optionally, replaced with a mouse click while the cursor is located over the location of the tap gesture (e.g., instead of detection of the contact followed by ceasing to detect the contact). Similarly, when multiple user inputs are simultaneously detected, it should be understood that multiple computer mice are, optionally, used simultaneously, or a mouse and finger contacts are, optionally, used simultaneously. 
     As used here, the term “affordance” refers to a user-interactive graphical user interface object that is, optionally, displayed on the display screen of device such as device  100  or  300  ( FIGS. 1A, 1B, and 3 ). For example, an image (e.g., icon), a button, and text (e.g., hyperlink) may each constitute an affordance. 
     1. Dual-Camera Zoom Capabilities 
     Attention is now directed to devices and user interfaces that enable zooming of a digital viewfinder using content received from multiple cameras, with reference to  FIGS. 5A-5T .  FIG. 5A  depicts exemplary device  500 , which is device  100  or  300  ( FIGS. 1A, 1B, and 3 ) in some embodiments. Device  500  has two cameras  502 - a  and  502 - b  located on a surface opposite display  504 . Cameras  502 - a  and  502 - b  are positioned such that they face the same direction and have overlapping fields of view. Cameras  502 - a  and  502 - b  have fixed, but different, focal lengths in the exemplary device  500 , meaning that the cameras do not provide variable optical zooming capabilities, natively (e.g., zooming accomplished by the movement of one or more optical elements relative to each other so as to change the focusing of incoming light on the camera sensor behind the one or more optical elements). In some examples, the focal length of camera  502 - b  is twice as long as the focal length of camera  502 - a , resulting in camera  502 - a  having a wider field of view but lower optical magnification, and camera  502 - b  having a narrow field of view but higher optical magnification. Camera  502 - a  is also referred to as a “wider-angle camera,” while camera  502 - b  is referred to as a “higher-magnification camera.” 
     Display  504  is touch screen  112  ( FIG. 1A ) or display  340  ( FIG. 3 ) in some embodiments. Display  504  shows camera user interface  506  provided by a camera application of the device. Digital user interface  506  has digital viewfinder  508  for displaying visual content received from one or more of wider-angle camera  502 - a  and/or higher-magnification camera  502 - b . Viewfinder  508  updates dynamically, meaning that its content changes as objects within the field of view of the viewfinder move with respect to device  500 . 
     In some embodiments, viewfinder  508  displays content from wider-angle camera  502 - a  or higher-magnification camera  502 - b  depending on the viewfinder&#39;s zoom setting: when the zoom setting of viewfinder  508  is less than a threshold zoom value, viewfinder  508  displays content from one camera (e.g., wider-angle camera  502 - a ) of device  500 . When the zoom setting of viewfinder  508  exceeds the threshold zoom value, digital viewfinder  508  displays content from the other camera of device  500  (e.g., higher-magnification camera  502 - b ). Because higher-magnification camera  502 - b  enjoys a greater amount of optical magnification natively, switching from camera  502 - a  to camera  502 - b  has the effect of magnifying (e.g., zooming) viewfinder content using the native optical properties of camera  502 - b.    
     In addition to switching between the display of content from different cameras in response to whether a zoom setting exceeds a threshold zoom value, viewfinder  508  provides digital zooming of content, meaning that, for example, while viewfinder  508  is displaying content from wider-angle camera  502 - a , viewfinder  508  can perform digital magnification on the content, responsive to changes in zoom setting, proportionately. 
     Notably, by using fixed camera  502 - a  to capture wider-angle (but lower-magnification) content and using fixed camera  502 - b  to capture higher-magnification (but narrower) content, device  500  provides the benefit of higher-quality, optical zooming with the thinner packaging advantages of cameras with fixed focal-length lenses (e.g., “fixed focal length cameras”). As used here, the term “capturing” visual content from a camera refers to using the light that enters the camera to obtain, with an optical sensor(s) (e.g.,  164 ), visual information that can be displayed on a display screen such as display  504 . 
     Camera user interface  506  has affordance  516  for storing visual content into visual media such as an image file or video file. As used here, “storing” captured visual content refers to saving the content into a long-term memory storage, such as by creating an image or video file having data representing the captured content in a non-volatile memory area of device  500 . In the depicted example, when the zoom setting of viewfinder  508  is less than a threshold zoom value, responsive to activation of affordance  516 , device  500  stores content from wider-angle camera  502 - a  into an image file, consistent with the composition shown in viewfinder  508 . When the zoom setting of viewfinder  508  exceeds the threshold zoom value, the device stores visual content from higher-magnification camera  502 - b  as an image file instead. Thus, device  500  stores visual content from a wider-angle camera when the user desires a wider-angled composition, and stores content from a higher-magnification camera when the user desires emphasis of an object of interest, such as house  520 . 
     Also, viewfinder  508  has zoom setting slider bar  510  and current zoom setting indicator  512 . The term “zoom setting” refers to a value reflective of the overall magnification that is applied to viewfinder content. This overall magnification can account for optical and/or digital magnification. “Optical magnification” refers to the magnification arising from the physical properties of a camera (e.g., CCD and lens(es)) and is sometimes referred to as base magnification. A camera of fixed focal length design provides a fixed optical magnification, if any. A camera of variable focal length design can provide variable optical magnification. In contrast, “digital magnification” refers to digital enlargement of content received from a camera that may (but need not) have already experienced optical magnification. 
     The length of slider bar  510  represents the range over which digital viewfinder  508  can be zoomed (through digital and/or optical magnification). The position of current zoom setting indicator  512  indicates the current level of zoom. In the illustrated example, when indictor  512  is located at the left end of slider bar  510 , digital viewfinder  508  displays content from wider-angle camera  502 - a  at its native level of optical magnification, without digital magnification. When indicator  512  is located at the right end of slider bar  510 , viewfinder  508  displays content from higher-magnification camera  502 - b  at a maximum level of digital magnification. In-between, viewfinder  508  displays content from one of cameras  502  with an amount of digital magnification (corresponding to the position of indicator  512 ) in addition to the native optical magnification of the camera being used. 
     Slider bar  510  includes optional threshold zoom setting indicator  514  representing the value of zoom at which viewfinder  508  switches between the use of content from wider-angle camera  502 - a  to higher-magnification camera  502 - b . As used here, the term “source camera” refers to the camera that is providing the content being displayed in a digital viewfinder such as viewfinder  508 . Viewfinder  508  includes optional source camera indicator  518 , which displays a value indicative of the source camera. Source camera indicator  518  in  FIG. 5A  shows the verbiage “1×” to indicate that a lower-magnification, for example, wider-angle camera  502 - a , is currently providing content to the viewfinder. Source camera indicator  518  can show alternative verbiage (e.g., “2×”) when a higher-magnification camera, for example, camera  502 - b , is providing content to the viewfinder. 
     Turning to  FIG. 5B , when device  500  detects movement of current zoom setting indicator  512  from its position in  FIG. 5A  in a rightward direction, viewfinder  508  enlarges its content. In embodiments utilizing fixed focal length cameras, this enlargement is provided by digital magnification of content (e.g., from wider-angle camera  502 - a ). Also, the change in zoom setting corresponds to the magnitude of the user input, meaning that content in viewfinder  508  zooms continuously as the user continues to move indicator  512 . In some embodiments, the change in zoom setting is proportional to the magnitude of input movement. 
     When continued movement of indicator  512  results in the indicator being moved across threshold zoom setting indicator  514 , viewfinder  508  switches from displaying content from wider-angle camera  502 - a  to displaying content from higher-magnification camera  502 - b . Because higher-magnification camera  502 - b  provides higher (native) optical magnification, a lesser amount of digital magnification (if any) is needed to maintain the overall size of the viewfinder&#39;s content. 
     As the user continues to move indicator  512  rightward of threshold zoom setting indicator  514 , viewfinder  508  applies digital magnification to the content from higher-magnification camera  502 - b  correspondingly and, optionally, proportionately with the magnitude of input movement. In this way, zoom setting slider bar  510  and current zoom setting indicator  512  constitute a “slider” control that governs the zoom setting of viewfinder  508  over the functional ranges of multiple cameras. 
     This zooming capability is beneficial in at least two ways. First, because camera  502 - a  has a wider field of view than camera  502 - b , viewfinder  508  can leverage wider-angle camera  502 - a  to provide more expansive visual compositions, allowing for more objects of interest to be included in an image taken with device  500  for example. Conversely, because camera  502 - b  has higher native optical magnification, viewfinder  508  can leverage higher-magnification camera  502 - b  to provide a targeted composition, allowing for a crisper, magnified view of one object of interest among multiple nearby objects. When implemented using cameras of fixed focal lengths, as is the case in the depicted embodiment, device  500  leverages the relatively simpler designs of fixed focal length cameras to impart higher-quality variable zoom functionality in thin form-factor devices. Second, viewfinder  508  does not require the user&#39;s active management of source camera selection, even as the user zooms through the useful ranges though of multiple source cameras, thereby reducing the cognitive burden on the user. 
     Attention is now directed to more techniques for controlling zoom settings, in addition to the use of a slider control, provided by viewfinder  508  in some embodiments.  FIGS. 5C and 5D  depict the use of touch input such as tapping input and de-pinching and/or pinching input to change the zoom setting of viewfinder  508 . As depicted in  FIG. 5C , user instruction to zoom viewfinder  508  can be a tap input such as single-finger tap input  522  and/or two-finger tap input  524 . As seen in  FIG. 5D , responsive to either input  522  or  524 , viewfinder  508  zooms into the displayed content (e.g., house  520 ) by switching to the use of content from higher-magnification camera  502 - b  (optionally applying digital magnification onto the received content). Viewfinder  508  also re-positions current zoom level indicator  512  to reflect the updated zoom setting. Further, viewfinder  508  updates source camera indicator  518  to indicate that viewfinder  508  is in a higher-magnification setting, for example, by displaying the verbiage of “2×” to indicate that viewfinder  508  is displaying content from a higher-magnification camera of the device. Although not shown, it is noted that finger taps  522  and  524  can each involve a single tap or multiple taps. In some embodiments, input  522  is a single-finger, double-tap touch input on display  504  or a touch-sensitive surface associated with display  504 . 
     Attention is now directed to additional techniques for controlling viewfinder zoom settings, particularly those related to the behavior of viewfinder  508  as its zoom setting is adjusted at or near the threshold value represented by threshold zoom setting indicator  514 , with reference to  FIGS. 5E-5K .  FIG. 5E  depicts viewfinder  508  displaying an object of interest—house  520 —at relatively zoomed-out setting using a low amount of digital magnification on content obtained from camera wider-angle  502 - a . This zoom setting is confirmed by the position of current zoom setting indicator  512  towards the left end of zoom setting slider bar  510 , as well as the indication of “1×” in source camera indicator  518 . While displaying house  520 , device  500  receives a de-pinching input represented by touches  526 . 
     Turning to  FIG. 5F , de-pinching input  526  causes viewfinder  508  to zoom-in, through digital magnification, onto the content from wider-angle camera  502 - a . As the touch contacts of touches  526  move apart, the viewfinder zooms correspondingly. This change in zoom setting results in an enlargement of the displayed house  520  and a corresponding movement of current zoom level indicator  512  in the rightward direction towards threshold indicator  514 . In the depicted example, the magnitude of content enlargement and movement of indicator  512  are proportional to the magnitude of de-pinching input  526   
       FIG. 5G  depicts the behavior of viewfinder  508  responsive to continued de-pinching input  526 , which is now of sufficient magnitude to move the zoom setting of the viewfinder beyond the threshold zoom setting represented by indicator  514 . But, viewfinder  508  ceases to zoom beyond the threshold zoom setting, despite the continued de-pinching movement of input  526 . In this way, threshold zoom setting indicator  514  provides a “detent” feature, emphasizing to the user that the end of the useful zoom range of one camera (e.g., wider-angle camera  502 - a ) has been reached and that further zooming operations will cause the device to switch from using the wider-angle camera to using the higher-magnification camera. 
     The detent can be overcome. In some embodiments, the detent is overcome if a user continues de-pinching input  526  by a sufficient magnitude after the viewfinder&#39;s zoom setting has reached the threshold value of indicator  514 .  FIGS. 5H and 5I  depict this aspect. As seen in  FIG. 5H , device  500  receives continued movement of de-pinching input  526  after the viewfinder&#39;s zoom setting has reached the threshold represented by indicator  514 . Viewfinder  508  determines whether this continued input has a magnitude exceeding a threshold magnitude, for example, a predetermined threshold distance. If the continued movement is below the threshold magnitude, the zoom setting of viewfinder  508  remains stationary, as seen in  FIG. 5J . If the continued movement of de-pinching input  526  exceeds the threshold magnitude, viewfinder  508  switches source camera to higher-magnification camera  502 - b , meaning that zooming resumes, as seen in  FIG. 5I . 
     When viewfinder  508  resumes zooming, the change in overall zoom setting is proportional to the overall movement of de-pinching input  526 , in some embodiments. That is, once the continued movement of de-pinching input  526  overcomes the detent, viewfinder  508  reacts as though the detent had not occurred: the zoom setting of the viewfinder catches up with the overall magnitude of the de-pinching input. In some embodiments, when viewfinder  508  resumes zooming, the change in zoom setting is proportional to only the post-detent movement of de-pinching input  526 . Put another way, in these embodiments, a portion of the movement of de-pinching input  526  is consumed to overcome the detent. 
     In some embodiments, the detent is overcome when a user provides a second, separate de-pinching input after releasing input  526 .  FIGS. 5J and 5K  illustrate this aspect. As seen in  FIG. 5J , device  500  receives separate de-pinching input  528 , after previous de-pinching input  526  is removed (e.g., after detecting liftoff of one or more of the contacts of de-pinching input  526 ). In response to this additional input  528 , viewfinder  508  zooms beyond the zoom value of threshold indicator  514 , meaning that viewfinder  508  switches from displaying content from wider-angle camera  502 - a  to displaying content from higher-magnification camera  502 - b . As seen in  FIG. 5K , house  520  is enlarged as compared with  FIG. 5J . The higher level of zoom is also confirmed by the corresponding movement of current zoom setting indicator  512  and by the use of the verbiage “2×” in source camera indicator  518 . 
     It is noted that while the “detent” features described using  FIGS. 5E-5K  are based on de-pinching and/or pinching touch inputs, the described features can function with other forms of user input. For example, the “detent” feature would also function with user input in the form of a touch movement of current zoom setting indicator  512  across threshold indicator  514  and/or depression of a mechanical zoom button or movement of zoom setting indicator  512  using a cursor and input device such as a mouse/trackpad. 
     Attention is now directed to still additional zoom-related features with reference to  FIGS. 5L-5N . Turning to  FIG. 5L , while viewfinder  508  is displaying content from wider-angle camera  502 - a , device  500  detects input  530  at a location of display  504 . Input  530  is a single-finger tap input in the depicted example. As seen in  FIG. 5M , responsive to input  530 , viewfinder  508  displays boundary box  532  indicating the area that viewfinder  508  is to zoom into. After displaying boundary box  532  momentarily, viewfinder  508  zooms into the indicated area, as seen in  FIG. 5N . Although not shown, boundary box  532  has a dotted perimeter in some embodiments. Although not shown, boundary box  532  flashes when it is displayed in some embodiments. 
     In the foregoing examples of  FIGS. 5A-5N , viewfinder  508  includes a zoom setting slider bar  510  that represents the useful zoom ranges of multiple cameras. Attention is now directed to other exemplary implementations of slider bars, particularly embodiments where a slider bar represents the range of only the source camera of a viewfinder, meaning that the slider acts an indicator of digital magnification (on content from a source camera), but not overall zoom (e.g., digital together with optical magnification). 
     This aspect is illustrated in  FIGS. 5O-5Q . As seen in  FIG. 5O , source camera indicator  518  indicates that the current source camera is wider-angle camera  502 - a . The width of zoom setting slider bar  550  thus depicts the zoom range of wider-angle camera  502 - a . Slider bar  550  need not include a discontinuity (e.g., a threshold value indicator) to signal the boundary between separate source cameras. 
     Responsive to input  538  representing user instructions to increase zoom, viewfinder  508  shows boundary box  540  identifying the area to be zoomed-into, as seen in  FIG. 5P . After displaying boundary box  540  momentarily, viewfinder  508  zooms into the identified area by switching to the display of content from higher-magnification camera  502 - b , as seen in  FIG. 5Q  (and, optionally, applies a digital magnification to content received from camera  502 - b ). 
     Furthermore, in the depicted embodiment, the amount of digital magnification that is applied to content from a source camera remains constant before and after the switch in source cameras. Device  500  accounts for the amount of digital magnification being applied onto content from wider-angle camera  502 - a  before the switch (e.g.,  FIG. 5O ), and applies the same amount of digital magnification onto content from higher-magnification camera  502 - b  after the switch (e.g.,  FIG. 5Q ). The positioning of current zoom setting indicator  552  thus remains stationary during source camera switches, even though viewfinder content becomes enlarged due to the higher native optical magnification of the new source camera. This treatment of indicator  552  beneficially reduces jitter in the zoom slider control during source camera switches. 
     Attention is now directed to techniques for directly selecting a source camera to be used as source for viewfinder  508 , in some embodiments, with reference to  FIGS. 5R-5T . As seen in  FIG. 5R , while viewfinder  508  is displaying content from one camera (e.g., wider-angle camera  502 - a ), the viewfinder shows camera selection affordance  546 . Camera selection affordance  546  provides a preview of content from another camera (e.g., higher-magnification camera  502 - b ). That is, affordance  546  acts as a miniature viewfinder by showing a dynamic thumbnail image sourced from an alternate camera of device  500 . 
     Camera selection affordance  546  is particularly useful where a user wishes to explore the impact of digital magnification versus optical magnification for artistic effect, for example. In these examples, viewfinder  508  permits the user to enlarge the content of a wider-angle camera to the degree where the digitally magnified content appears grainy.  FIG. 5S  depicts the digital magnification of house  520  to this extent (as depicted by the use of dotted lines). Simultaneous with this display of house  520 , viewfinder  508  provides affordance  546  a preview from higher-magnification camera  502 - b , suggesting to the user that an alternate source of content is available. 
     When device  500  detects input  548  on affordance  546 , viewfinder  508  switches from the display of content from wider-angle camera  502 - a  to the display of content from higher-magnification camera  502 - b . Leveraging the higher native optical magnification properties of camera  502 - b , viewfinder  508  provides a crisper version of house  520  as compared with camera  502 - a  at equivalent levels of overall (e.g., digital and optical) magnification. While viewfinder  508  displays content from higher-magnification camera  502 - b , affordance  546  updates to display content from wider-angle camera  502 - a  dynamically. 
     In the depicted embodiment, the amount of overall magnification due to digital and optical magnification that is applied to content from a source camera remains constant before and after the switch in source cameras. For example, device  500  accounts for the amount of digital magnification that is applied to the base optical magnification of wider-angle camera  502 - a  before the switch in source cameras, and determines a corresponding (e.g., lower) amount of digital magnification that should be applied to content from higher-magnification camera  502 - b  after the switch, so that the combined effects of digital and native optical magnification with respect to viewfinder objects remain the same before and after switching source cameras. As can be seen by comparing  FIGS. 5S and 5T , house  520  appears at approximately the same size before and after the switch in source cameras. This treatment of viewfinder content beneficially reduces jitter in the viewfinder display area during source camera switches. 
     In some embodiments, camera selection affordance  546  is displayed only after a user zooms viewfinder  508  beyond a threshold zoom setting. This withholding of the display of affordance  546  reduces on-screen clutter and increases the amount of display area that is available for previewing content from an active source camera. 
     In some embodiments, camera selection affordance  546  does not provide a dynamic preview of content, but is instead fashioned as an “enhance” button, such as by displaying affordance  546  as a button labeled “enhance”. In these embodiments, when the “enhance” button is selected, viewfinder  508  switches source cameras, and performs the necessary calculations to maintain the on-screen size of viewfinder content. By switching source cameras to provide a crisper showing of viewfinder content at the same size, affordance  546  provides the visual effect of enhancing the displayed viewfinder content. 
     In the examples of  FIGS. 5A-5T , device  500  switches between displaying content from multiple cameras responsive to user interaction with viewfinder  508 . The on-screen switching of source cameras can, however, introduce visual artifacts into viewfinder  508  that distract from the overall user experience. For example, viewfinder  508  may appear jittery if content from one camera is not aligned with content from another camera during a switch of source cameras. This effect, due to parallax, increases as the distance between the cameras increases and decreases as the distance between the cameras and the subject increases. 
     Attention is now directed to other features that mitigate negative visual impacts while zooming the viewfinder. In some embodiments, viewfinder  508  provides a transition effect during the switching of source cameras. In some examples, the transition effect is a cross-fade effect in which content from both cameras are blended and displayed momentarily. In some examples, the transition effect is a cross-fade effect in which content from both cameras are simultaneously displayed atop one another as translucent overlays, momentarily. In some examples, the transition effect is a blur effect in which content from one or both cameras is blurred momentarily. The level of blending, translucency, and/or blur is adjusted dynamically as the zoom setting changes in some embodiments. These transition effects mask minor misalignments in viewfinder content positioning and/or changes in viewfinder object sizes resulting from the switch in source camera, thereby improving the perceived quality of device  500 . 
     In some embodiments, viewfinder  508  reduces parallax associated with switching source cameras. As the cameras of device  500  may not be concentric, but are rather placed side by side, switching between source cameras can produce minor parallax caused by the different positions (or vantage points) of the cameras relative to the subject. To reduce the appearance of parallax within viewfinder  508  in these embodiments, device  500  identifies a portion of viewfinder content that is to survive the switch (e.g., a point of interest such as a portion of house  520 ), and performs calculations necessary to maintain the portion of interest at the same location of display  504 . More specifically, viewfinder  508  shifts as necessary the visual content received from the new source camera and/or the old source camera so that the point of interest is displayed at the same pixel(s) of display  504  before and after the switch in source cameras. If the point of interest is selected so that it include the region of the visual content that the user is interested in and likely looking at (e.g., by selecting a focus point selected by the user or a centroid of a pinch input), the shift caused by parallax when switching between the two cameras is reduced for the region of the visual content that the user is interested in (even though a greater shift caused by parallax will occur in other regions of the visual content). 
     In some embodiments, the point of interest is specified by the user, such as the location of a tap or the centroid of a de-pinching input. In some embodiments, the point of interest is specified by the device, such as by identifying a portion of viewfinder content that exhibits pixel-to-pixel variations indicative of a foreground object (as opposed to background), and that to survive the camera switch operation. In this way, device  500  reduces the appearance of parallax caused by differences in camera vantage points. 
     In some embodiments, visual artifacts in the viewfinder that can be caused by switching source cameras is avoided altogether by confining viewfinder  508  to the display of content from a preferred camera, regardless of zoom setting. For instance, because wider-angle camera  502 - a  has a field-of-view that subsumes the field of view of the higher-magnification camera  502 - b , viewfinder  508  can rely on digital magnification of content from wider-angle camera  502 - a  to mimic the display of content from higher-magnification camera  502 - b , without resorting to the use of higher-magnification camera  502 - b.    
     In some embodiments, when a user elects to store a captured picture, for example by activating affordance  516 , device  500  identifies and uses the camera most optimal for capturing content at the overall zoom setting to create the output media. For example, if viewfinder  508  is at a zoom setting below the threshold value represented by indicator  514  ( FIG. 5A ), device  500  stores visual information from wider-angle camera  502 - a , as the same image composition cannot be obtained from camera  502 - b , which has a narrower field of view. Conversely, if viewfinder is  508  at a zoom setting above the threshold value, device  500  stores visual information from the higher optical-magnification camera  502 - b , as the higher-magnification camera enjoys greater clarity using native optical magnification. 
     2. Dual Digital Viewfinder 
     Attention is now directed to embodiments featuring dual, simultaneously displayed digital viewfinders for creating still images, with reference to  FIGS. 6A-6E . As seen in  FIG. 6A , device  600  has cameras  602 - a  and  602 - b  located on a side opposite of display  604 . Display  604  provides camera user interface  606  having dual digital viewfinders  608 - a  and  608 - b . Viewfinder  608 - a  displays content from one camera (e.g., camera  602 - a ) while viewfinder  608 - b  displays content from the other camera (e.g., camera  602 - b ), simultaneously. Camera  602 - a  is a wider-angle camera and camera  602 - b  is a higher-magnification camera, in some embodiments. 
     User interface  606  allows a user to manage the compositions of digital viewfinders  608 - a  and  608 - b  independently, such as by zooming, panning, and freezing viewfinder content. User interface  606  also allows a user to store visual information from both cameras simultaneously. In some embodiments, visual information from both cameras are stored or otherwise associated with one another, forming what is referred to as a “diptych” image. 
     As seen in  FIG. 6A , viewfinder  608 - a , which displays content from wider-angle camera  602 - a , allows viewfinder objects including house  612 , tree  614 , and car  616  to be previewed together. In contrast, viewfinder  608 - b , which displays content from higher-magnification camera  602 - b , allows house  612  and tree  614  to be previewed at a larger size, but is unable to capture car  616  within its narrower field of view. 
     Turning to  FIG. 6B  while referring back to  FIG. 6A , in response to exemplary user input  620 , which is a touch movement within the display area of viewfinder  608 - a , viewfinder  608 - a  pans rightward, effectively removing tree  614  from view. Viewfinder  608 - b  does not pan in response to user input  620 , as the input falls outside (or, optionally because the input starts outside) of the display area of viewfinder  608 - b.    
     Turning to  FIG. 6C  while referring back to  FIG. 6B , in response to exemplary user input  622 , which is a de-pinching touch input within the display area of viewfinder  608 - a , viewfinder  608 - a  zooms into displayed objects  612  and  616 . Viewfinder  608 - b  does not zoom in response to user input  622 , as the input falls outside (or, optionally because the input starts outside) of the display area of viewfinder  608 - b.    
     Turning to  FIG. 6D  while referring back to  FIG. 6C , in response to exemplary user input  624 , which is tap within the display area of viewfinder  608 - a , viewfinder  608 - a  freezes its displayed content, meaning that the displayed content becomes static and no longer updates dynamically based on movement of objects with respect to camera  602 - a . Viewfinder  608 - b  does not freeze in response to user input  624 , as the input falls outside the display area of viewfinder  608 - b . Thus, as device  600  pans to the left, the content of viewfinder  608 - b  updates dynamically by panning to the left. Meanwhile, viewfinder  608 - a , which is frozen, remains fixed despite the movement of device  600 . 
     In some embodiments, the content of a frozen digital viewfinder can still be manipulated by a user, such that the image is, optionally, zoomed in or out, panned, rotated, or subject to digital filters and other editing effects. To support these types of image manipulation, particularly zooming out and panning, the freezing of viewfinder  608 - a  in some embodiments involves capturing camera content beyond what is immediately needed (e.g., in terms of image size and resolution) for display in a frozen viewfinder. The extra content can be later revealed responsive to zooming and panning of the frozen viewfinder as appropriate. 
     In some embodiments, a frozen viewfinder unfreezes in response to an additional user input within its display area. Exemplary user inputs for unfreezing a frozen viewfinder include a single-finger tap, a double-finger tap, and a de-pinching/pinching input. In some embodiments, upon unfreezing, a viewfinder immediately resumes displaying source camera content dynamically. In some embodiments, upon unfreezing, a viewfinder continues to display information statically (e.g., with the composition that the device had displayed while frozen) until an additional input (e.g., to zoom or pan the viewfinder) is detected, at which time the unfrozen viewfinder begins to display camera content dynamically again. 
     Turning to  FIGS. 6E and 6F , in response to exemplary user input  620 , which is a two-finger touch movement  628  in a horizontal direction, device  600  creates diptych image  630  using content as seen in frozen viewfinder  608 - a  and the content as seen in viewfinder  608 - b  sourced from camera  602 - b . In some embodiments, diptych image  630  is stored into the non-volatile storage of device  600  as one or more associated files such that diptych image  630  be later retrieved from a library collection of visual media content. 
     For brevity, it is noted that viewfinder  608 - b  can be zoomed, panned, and/or frozen in the same manner as described with reference to viewfinder  608 - a . Further, although not shown, each of viewfinders  608 - a  and  608 - b  can display one or more affordances for controlling and/or indicating the zoom setting of respective viewfinder, such as the zoom “slider” controls described with respect to  FIGS. 5A-5T . Further still, although the discussion of  FIGS. 6D and 6E  relies on exemplary input  694  for freezing a viewfinder, in some embodiments, the release of an existing input is taken as an instruction to freeze a viewfinder. For example, a viewfinder can freeze as a user releases the touch input that was used to pan the viewfinder&#39;s displayed content (e.g., release of panning input  620  in  FIG. 6B ), meaning that the release of an input can itself be recognized as an input for freezing a viewfinder, in these embodiments. 
     Also, although the discussion of  FIGS. 6A-6F  involve the use of certain exemplary inputs for triggering specific viewfinder effects (e.g., single-finger single-tap to freeze a viewfinder), one of ordinary skill in the art would appreciate that other types of input can be used to affect viewfinder behavior. For example, panning can be performed using multi-finger inputs, zooming can be performed using a hardware button of device  600 , freezing can be performed using multiple taps, and the storing of viewfinder content into a diptych image can be invoked using touch inputs other than a two-finger horizontal swipe, without departing from the principal capabilities of device  600 . Further, device  600  can interpret parts of a continuous touch gesture as containing multiple inputs for controlling viewfinders, in some embodiments. For example, device  600  can interpret a touch gesture that includes a two-finger de-pinching component, followed by a lateral movement of the two fingers, and followed by a release of one of the two fingers, as containing three inputs: the initial de-pinching input zooms a relevant viewfinder, the later two-finger lateral movement pans the viewfinder, and the subsequent single-finger release freezes the viewfinder. 
     Attention is now directed to embodiments featuring dual, simultaneously displayed digital viewfinders for creating videos, with reference to  FIG. 7 . As seen in  FIG. 7 , device  700  has cameras  702 - a  and  702 - b  located on a side opposite of display  704 . Display  704  provides camera user interface  706  having dual digital viewfinders  708 - a  and  708 - b . Viewfinder  708 - a  displays content from one camera (e.g., camera  702 - a ) while viewfinder  708 - b  displays content from the other camera (e.g., camera  702 - b ). Camera  702 - a  is a wider-angle camera and camera  702 - b  is a higher-magnification camera in some embodiments. 
     User interface  706  allows a user to manage the compositions of digital viewfinders  708 - a  and  708 - b  independently, such as by zooming and panning viewfinder content separately. User interface  706  also allows a user to initiate simultaneous recording (e.g., storing) of visual information from both cameras. As seen in the example of  FIG. 7 , device  700  can simultaneously store a wider-angle video based on the composition of viewfinder  708 - a , as well as a more zoomed-in video based on the composition of higher-magnification viewfinder  708 - b . In the illustrated example, device  700  is storing a court-side view of a volleyball serve using the wider-angle composition of viewfinder  708 - a , as well as an enlarged view of a single volleyball player based on the higher-magnification composition of viewfinder  708 - b.    
     In some embodiments, user interface  706  permits user control of the frame rate at which “video” is stored. For example, user interface  706  can store visual information from camera  702 - a  (as shown in viewfinder  708 - a ) at 24 frames per second (fps), which is accepted in filmography as sufficient for producing content perceived by human users as video. Simultaneously, visual information from camera  702 - b  (as shown in viewfinder  708 - b ) can be stored at a higher frame rate, such as 48 fps, to enable slow motion playback of the volleyball player&#39;s serve in detail. Conversely, visual information from camera  702 - b  can be stored at the typical 24 fps while visual information from camera  702 - a  is stored at a lower rate of three fps so as to impart a snapshot quality to the “video” taken from camera  702 - a.    
     In some embodiments, user interface  706  permits user control of other visual characteristics that are applied to a stored video. In some examples, content from the first and second cameras are stored at different resolutions. In some examples, content from the first and second cameras are stored using different image enhancement techniques, including image processing techniques that alter the appearance of an image or video, such as its brightness, contrast, saturation, hue, color intensity, exposure, color scheme, and/or the application of filters. 
     In some embodiments, content stored from one camera and used as an identifier for content stored from another camera. For example, a still image obtained from wider-angle camera  702 - a  is used as a thumbnail image to represent a video file created based on content from higher-magnification camera  702 - b . Device  700  can display the thumbnail image (or other graphical representation) of the stored video among a library of videos for later playback selection. 
     In some embodiments, non-visual media is captured and stored with the visual content from the first and second cameras. For example, non-visual media includes audio media captured by a microphone of device,  100 ,  300 , or  500 , such as microphone  113  ( FIG. 1A ). In some embodiments, a user can trigger audio playback while device  700  is displaying a library collection of stored videos, ahead of a user&#39;s selection of a stored video for visual playback. In this way, the audio component can assist the user&#39;s selection of a video for playback. In some embodiments the enhanced-zoom mode of camera operation described with reference to  FIGS. 5A-5T , the dyptich mode of camera operation described with reference to  FIGS. 6A-6G , and the multimedia-capture mode of camera operation described with reference to  FIG. 7  are all modes of operation of the same set of cameras, and a user can switch between these modes depending on the situation and the user&#39;s preferences and save media captured in the different modes of operation to a same camera roll or other media gallery. 
     3. Exemplary Processes 
       FIGS. 8A-8C  are flow diagrams illustrating exemplary process  800  for providing viewfinder zoom capabilities using multiple cameras in accordance with some embodiments, such as those described above with reference to  FIGS. 5A-5T . Process  800  is carried out by device  500  ( FIGS. 5A-5T ), which is, optionally, electronic device  100  or  300  ( FIGS. 1A and 3 ), in some embodiments. 
     At block  802 , the electronic device displays a digital viewfinder showing content from one of at least two cameras. An exemplary digital viewfinder is viewfinder  508  ( FIGS. 5A-5T ). Exemplary cameras include wider-angle camera  502 - a  and higher-magnification camera  502 - b  ( FIGS. 5A-5T ). Viewfinder content is displayed at a certain zoom setting. 
     At block  804 , the electronic device detects user input representing a user instruction to store visual media. An exemplary user instruction to store visual media is the activation of affordance  516  in camera user interface  506  ( FIGS. 5A-5T ). 
     At block  806 , responsive to the user input, a determination is made as to whether the zoom setting is above or below a threshold zoom value. If the zoom setting is below the zoom threshold value, then processing proceeds to block  808  where content from a first camera (e.g., wider-angle camera  502 - a ) is stored. If the setting is above the zoom threshold value, then processing proceeds to block  810  where content from a second camera (e.g., higher-magnification camera  502 - b ) is stored. Storing content from a camera includes creating an image or video file, in a non-volatile memory of the electronic device, in some embodiments. 
     Block  802  optionally includes sub-block  802 - a . As depicted in  FIG. 8B , during sub-block  802 - a , the selection of camera content for display in the viewfinder is made by determining whether the zoom setting is above or below a threshold zoom value. If the zoom setting is below the threshold zoom value, then content is displayed from a first camera (e.g., wider-angle camera  502 - a ). If the setting is above the threshold zoom value, then content is displayed from a second camera (e.g., higher-magnification camera  502 - b ). 
     Block  802  optionally includes sub-block  802 - a . As depicted in  FIG. 8B , during sub-block  802 - b , the electronic device switches the source camera of its viewfinder responsive to user input representing an instruction to change viewfinder source camera. The user input is an activation of an on-screen camera selection affordance (e.g., affordance  546  in  FIG. 5S ) in some examples. The user input is a tap on the viewfinder (e.g., tap  522  or  524  in  FIG. 5C , tap  530  in  FIG. 5L , or tap  538  in  FIG. 5O ) in some examples. 
     Block  802  optionally includes sub-block  802 - c . As depicted in  FIG. 8C , during sub-block  802 - c , the electronic device detects user input representing a request to change the zoom setting from a value below to a value greater than the threshold zoom value. Exemplary user input to change the zoom setting include a pinching touch input, a de-pinching touch input, a touch movement, one or more taps, depression of a hardware button, so forth. Responsive to the user input, the electronic device zooms the viewfinder by displaying content from the first camera (e.g., wider-angle camera  502 - a ) and then switching to displaying content from the second camera (e.g., higher-magnification camera  502 - b ). In addition, before switching to the second camera, content from the first camera (e.g., wider-angle camera  502 - a ) is digitally magnified responsive to the user input. 
     Block  802  optionally includes sub-block  802 - d . As depicted in  FIG. 8C , during sub-block  802 - d , the electronic device detects user input representing a request to change the zoom setting to a value greater than the threshold zoom value. Responsive to the user input, the electronic device zooms the viewfinder by digitally magnifying content from the first camera (e.g., wider-angle camera  502 - a  in  FIG. 5A ), but does not switch to displaying content from the second camera (e.g., higher-magnification camera  502 - b  in  FIG. 5B ). Rather, the viewfinder ceases to zoom beyond the maximum zoom level of the first camera (e.g., wider-angle camera  502 - a ). Upon pausing at the maximum zoom level of the first camera, the viewfinder switches to displaying content from the second camera (e.g., higher-magnification camera  502 - b ) under some conditions. For example, the viewfinder switches source camera when the continued movement of the detected user input exceeds a threshold magnitude. As another example, the viewfinder switches source camera when a separate, second user input representing a request to change the zoom setting to a value greater than the threshold zoom value is detected. 
       FIG. 9  is a flow diagram illustrating exemplary process  900  for storing visual content using multiple cameras in accordance with some embodiments, such as those described above with reference to  FIGS. 6A-6F . Process  900  is carried out by device  600  ( FIGS. 6A-6F ), which is, optionally, electronic device  100  or  300  ( FIGS. 1A and 3 ), in some embodiments. 
     At block  902 , the electronic device displays two digital viewfinders. A first displayed viewfinder (e.g., viewfinder  608 - a  in  FIGS. 6A-6F ) shows content from a first camera (e.g., wider-angle camera  602 - a  in  FIGS. 6A-6F ). A second displayed viewfinder (e.g., viewfinder  608 - b  in  FIGS. 6A-6F ) shows content from a second camera (e.g., higher-magnification camera  602 - b  in  FIGS. 6A-6F ). 
     At block  904 , user input representing manipulation of the first viewfinder is detected. The input is instruction to pan, zoom, and/or freeze the viewfinder, for example. The input is provided on an area of display  604  or a touch-sensitive surface corresponding to the display area of the first viewfinder. Responsive to this input, the first viewfinder performs the requested operation. The second viewfinder need not be affected by this input. 
     At block  906 , user input representing manipulation of the second viewfinder is detected. The input is instruction to pan, zoom, and/or freeze the viewfinder, for example. The input is provided on an area of display  604  or a touch-sensitive surface corresponding to the display area of the second viewfinder. Responsive to this input, the second viewfinder performs the requested operation. The first viewfinder need not be affected by this input. 
     Optionally, at block  908 , user input representing an instruction to unfreeze a frozen viewfinder is detected. Responsive to the instruction, the relevant viewfinder is unfrozen and begins to dynamically display visual information received from a corresponding source camera. 
     At block  910 , user input representing an instruction to store visual content from the first and second cameras, consistent with the composition as presented in the first and second viewfinders, is detected. Responsive to this user input, the electronic device creates a still image containing content from the first and second cameras and stores the still image into long-term storage such as a non-volatile memory. In some embodiments, content from the first and second cameras are stored side-by-side to provide the appearance of a “diptych.” In some embodiments, the still image is stored into a library of visual content, such as into a library of images and videos. 
       FIG. 10  is a flow diagram illustrating exemplary process  1000  for providing viewfinder zoom capabilities using multiple cameras in accordance with some embodiments, such as those described above with reference to  FIG. 7 . In some embodiments, process  1000  is carried out by device  700  ( FIG. 7 ), which is, optionally, electronic device  100  or  300  ( FIGS. 1A and 3 ). 
     At block  1002 , the electronic device displays two digital viewfinders. A first displayed viewfinder (e.g., viewfinder  708 - a  in  FIG. 7 ) shows content from a first camera (e.g., wider-angle camera  702 - a  in  FIG. 7 ). A second displayed viewfinder (e.g., viewfinder  708 - b  in  FIG. 7 ) shows content from a second camera (e.g., higher-magnification camera  702 - b  in FIG.  7 ). Optionally, at block  1004 , user input representing manipulation of the first and/or second viewfinder is detected. The input is instruction to pan and/or zoom a viewfinder, for example. The user input may result in viewfinders  708 - a  and  708 - b  having different visual characteristics. 
     At block  1006 , user input representing an instruction begin recording (e.g., storing) content from the first and second cameras as seen in viewfinders  708 - a  and  708 - b , respectively, is detected. At block  1008 , responsive to the user input, the electronic begins to store a first and a second visual media using content from the first and second camera based on the composition of the first and second viewfinders, concurrently. 
     In some embodiments, concurrently storing a first and second visual media includes concurrently recording two videos, concurrently storing two still images, or concurrently recording a digital video and storing one or more still images. In some embodiments, concurrently storing a first and second visual media includes storing the first and second visual media in a memory such as a non-volatile memory. In some embodiments, the first and second visual media components are stored as a single file or are other associated with one another. At block  1010 , the stored visual media is displayed among a collection of media objects. 
     At block  1012 , upon user selection of a graphical user interface element representing the stored visual media, the stored visual media is played-back on a display of the electronic device. 
     In accordance with some embodiments,  FIG. 11  shows a functional block diagram of an electronic device  1100  configured in accordance with the principles of the various described embodiments. The functional blocks of the device are, optionally, implemented by hardware, software, or a combination of hardware and software to carry out the principles of the various described embodiments, including those described with reference to the user interfaces of  FIGS. 5A-5T . 
     As seen in  FIG. 11 , exemplary electronic device  1100  includes display unit  1102  configured to display graphical objects including the digital viewfinders described above; input interface unit  1104  configured to detect user input. Optionally, device  1100  includes touch-sensitive surface unit  1106  either as part of or operatively coupled to input interface unit  1104  configured to detect touch input. In some embodiments, touch-sensitive surface unit  1106 , when present, is separate from display unit  1102 . In some embodiments, touch-sensitive surface unit  1106 , when present, forms a touch screen with display unit  1102 . Device  1100  also includes camera units  1106  and  1108  configured to capture visual content; memory unit  1110  configured to store content captured by one or more of the cameras; and non-visual media capturing unit  1112  configured to capture non-visual media such as audio. Device  1100  also includes processing unit  1114 . In some embodiments processing unit  1114  supports an input detection unit  1116  that is configured to detect input via input interface unit  1106 ; viewfinder  1118  zooming unit configured to provide zooming features for digital viewfinder(s) displayed via display unit  1102 ; viewfinder panning unit configured to pan the contents of digital viewfinder(s) displayed via display unit  1102 ; parallax adjustment unit  1122  for reducing the effects of parallax caused by the different locations of camera units  1108  and  1110  with respect a point of interest; and display enabling unit  1124  to enable the display of content on display unit  1102 . 
     As display unit  1102  is displaying (e.g., with display enabling unit  1124 ) a digital viewfinder having content from one of a first and a second camera (e.g., camera units  1108  or  1110 ) displayed at a zoom setting, processing unit  1114  is configured to: detect (e.g., with input detection unit  1116 ) user input representing an instruction to store visual media; in response to detecting the input representing the instruction to store visual media and in accordance with a determination that the zoom setting is below a threshold zoom value; store visual media using content from the first camera (e.g., into visual media storing unit  1112 ); and in response to detecting the input representing the instruction to store visual media and in accordance with a determination that the zoom setting is above the threshold zoom value, store visual media using content from the second camera (e.g., into visual media storing unit  1112 ). 
     In some embodiments, first camera unit  1108  has a first focal length and the second camera unit  1110  has a second focal length different than the first focal length. In some embodiments, first camera unit  1108  has a fixed focal length and second camera unit  1110  has a fixed focal length. In some embodiments, second camera  1110  has a longer focal length than first camera  1108 . In some embodiments, the fields of view of the first camera  1108  and the second camera  1110  overlap by at least fifty percent. 
     In some embodiments, processing unit  1114  is configured to enable display (e.g., with display enabling unit  1124 ) the digital viewfinder via display unit  1102  by enabling display of content from first camera unit  1108  (e.g., a wider-angle camera) in the digital viewfinder, in accordance with a determination (e.g., by viewfinder zooming unit  1118 ) that the zoom setting is below the threshold zoom value. In some embodiments, processing unit  1114  is configured to enable display (e.g., with display enabling unit  1124 ) the digital viewfinder via display unit  1102  by enabling display of content from second camera  1110  (e.g., a higher-magnification camera) in the digital viewfinder, in accordance with a determination (e.g., by viewfinder zooming unit  1118 ) that the zoom setting is above the threshold zoom value. 
     In some embodiments, processing unit  1114  is configured to: enable display (e.g., with display enabling unit  1124 ), via display unit  1102 , of the digital viewfinder by enabling display of content from first camera  1108  (e.g., a wider-angle camera) at a zoom setting lower than the threshold zoom value; detect (e.g., through input detection unit  1116 ) input representing a request to set the zoom setting to a value greater than the threshold zoom value; and zoom (e.g., with viewfinder zooming unit  1118 ) the digital viewfinder displayed on display unit  1102  by displaying content from first camera  1108  (e.g., a wider-angle camera) and then switching to displaying content from second camera  1110  (e.g., a higher-magnification camera) in response to detecting the input representing the request to set the zoom setting to a value greater than the threshold zoom value. 
     In some embodiments, processing unit  1114  is configured to zoom (e.g., with viewfinder zooming unit  1118 ) the digital viewfinder by performing a digital zoom operation on content from first camera  1108  (e.g., a wider-angle camera), where the first camera has a wider field of view than second camera  1110  (e.g., a higher-magnification camera), before switching (e.g., with viewfinder zooming unit  1118 ) to displaying content from second camera  1110 . 
     In some embodiments, processing unit  1114  is configured to: detect (e.g., with input detection unit  1116 ) a user&#39;s specification of a point of interest in the digital viewfinder, when switching (e.g., with viewfinder zooming unit  1118 ) from displaying content from first camera  1108  (e.g., a wider-angle camera) to displaying content from second camera  1110  (e.g., a higher-magnification camera), adjust the relative positions of the displayed content from first camera  1108  and the displayed content from second camera  1110  (e.g., a higher-magnification camera) to reduce the appearance of parallax at the point of interest (e.g., with viewfinder zooming unit  1118 ). 
     In some embodiments, processing unit  1114  is configured to: enable display (e.g., with display enabling unit  1124 ) the digital viewfinder on display unit  1102  by enabling display of content from first camera  1108  (e.g., wider-angle camera) at a zoom setting lower than the threshold zoom value; and detect (e.g., with input detection unit  1116 ) input representing a request to set the zoom setting to a value greater than the threshold zoom value. In some embodiments, processing unit  1114  is configured to: in response to detecting the input representing the request to set the zoom setting to a value greater than the threshold zoom value, zoom (e.g., with viewfinder zooming unit  1118 ) the digital viewfinder to display content from first camera  1108  (e.g., a wider-angle camera) at the threshold zoom value. 
     In some embodiments, the input representing the request to set the zoom setting to a value greater than the threshold zoom value is a first input, and processing unit  1114  is configured to: after detecting the first input and while the zoom setting is set to the threshold zoom value, detect (e.g., with input detection unit  1116 ) a second input representing a second request to set the zoom setting to a second value greater than the threshold zoom value. In some embodiments, processing unit  1114  is configured to: in response to detecting the second input, zoom (e.g., with viewfinder zooming unit  1118 ) the digital viewfinder to display content from second camera  1110  (e.g., a higher-magnification camera) at the second value of zoom setting. 
     In some embodiments, processing unit  1114  is configured to enable display (e.g., with display enabling unit  1124 ), via display unit  1102 , in the digital viewfinder a visual indication of the zoom setting. In some embodiments, processing unit  1114  is configured to enable display (e.g., with display enabling unit  1124 ), via display unit  1102 , in the digital viewfinder a visual indication of the threshold zoom value. 
     In some embodiments, processing unit  1114  is configured to zoom (e.g., with viewfinder zooming unit  1118 ) the digital viewfinder to display content from second camera  1110  (e.g., a higher-magnification camera) at the requested zoom setting value by displaying, via display unit  1102 , a transition effect in the digital viewfinder indicative of the zoom setting changing from a value at the threshold to a value above the threshold. The transition effect transitions between an image captured by first camera  1108  (e.g., a wider-angle camera) and an image captured by second camera  1110  (e.g., a higher-magnification camera), for example. 
     In some embodiments, first camera  1108  has a wider field of view than second  1110  camera and the digital viewfinder displayed on display unit  1102  comprises content from first camera  1108 , regardless of the zoom setting. 
     In some embodiments, first camera  1108  and second camera  1110  have overlapping fields of view, and processing unit  1114  is configured to, while display unit  1102  is displaying content from one of the first and second cameras  1108  and  1110  in the digital viewfinder (e.g., with display enabling unit  1124 ), detect (e.g., with input detection unit  1116 ) one or more taps on the touch-sensitive surface unit. In some embodiments, processing unit  1114  is configured to, in response to detecting the one or more taps, switch (e.g., with viewfinder zooming unit  1118 ) the displayed content of the digital viewfinder to content from the other of the first and second cameras. 
     In some embodiments, processing unit  1114  is configured to, while display unit  1102  is displaying (e.g., with display enabling unit  1124 ) content from one of the first and second cameras  1108  and  1110  in the digital viewfinder, enable display via the display unit a camera selection affordance, the camera selection affordance displaying content from the other camera of the first and second cameras. The one or more taps is detected at a location of the touch-sensitive surface unit corresponding to the camera selection affordance in some examples. 
     In some embodiments, processing unit  1114  is configured to apply digital zooming (e.g., with viewfinder zooming unit  1118 ) to content from first camera  1108  and/or second camera  1110 . In some embodiments, processing unit  1114  is configured to pan (e.g., with viewfinder panning unit  1118 ) content from first camera  1108  and/or second camera  1110  responsive to user input detected through input detection unit  1116 . 
     The operations described above with respect to  FIGS. 8A-8C  are, optionally, implemented by components depicted in  FIGS. 1A-1B, 3 , or  FIG. 11 . For example, detecting operation  804  is, optionally, implemented by event sorter  170 , event recognizer  180 , and event handler  190 . Event monitor  171  in event sorter  170  detects user input on an input device, and event dispatcher module  174  delivers the event information to application  143 . A respective event recognizer  180  of application  143  compares the event information to respective event definitions  186 , and determines whether the input represents an instruction to store viewfinder content. When a respective event or sub-event is detected, event recognizer  180  activates an event handler  190 , which may use or call data updater  176 , object updater  177 , or GUI updater  178  to perform corresponding application updates. It would be clear to a person of ordinary skill in the art how other processes can be implemented based on the components depicted in  FIGS. 1A-1B  and/or  FIG. 3 . 
     It is understood by persons of skill in the art that the functional blocks described in  FIG. 11  are, optionally, combined or separated into sub-blocks to implement the principles of the various described embodiments. Therefore, the description herein optionally supports any possible combination or separation or further definition of the functional blocks described herein. For example, units  1102 - 1112  can have associated “controller” units that are operatively coupled with the respective unit and processing unit  1114  to enable operation. These controller units are not separately illustrated in  FIG. 11  but are understood to be within the grasp of one of ordinary skill in the art who is designing a device having units  1102 - 1112  such as device  1100 . The description herein thus optionally supports combination, separation, and/or further definition of the functional blocks described herein. 
     In accordance with some embodiments,  FIG. 12  shows a functional block diagram of an electronic device  1200  configured in accordance with the principles of the various described embodiments. The functional blocks of the device are, optionally, implemented by hardware, software, or a combination of hardware and software to carry out the principles of the various described embodiments, including those described with reference to the user interfaces of  FIGS. 6A-6G . 
     As seen in  FIG. 12 , exemplary electronic device  1200  includes display unit  1202  configured to display graphical objects including the digital viewfinders described above; input interface unit  1204  configured to detect user input. Optionally, device  1200  includes touch-sensitive surface unit  1206  either as part of or operatively coupled to input interface unit  1204  configured to detect touch input. In some embodiments, touch-sensitive surface unit  1206 , when present, is separate from display unit  1202 . In some embodiments, touch-sensitive surface unit  1206 , when present, forms a touch screen with display unit  1202 . Device  1200  also includes camera units  1206  and  1208  configured to capture visual content; memory unit  1210  configured to store content captured by one or more of the cameras; and visual media capturing unit  1212  configured to capture visual media such as videos and/or images (and optionally, non-visual media such as audio). Device  1200  also includes processing unit  1214 . In some embodiments processing unit  1214  supports an input detection unit  1216  that is configured to detect input via input interface unit  1206 ; viewfinder zooming unit  1218  configured to provide zooming features for digital viewfinder(s) displayed via display unit  1202 ; viewfinder panning unit configured to pan the contents of digital viewfinder(s) displayed via display unit  1202 ; viewfinder freezing unit  1222  for freezing the content of one or more digital viewfinders displayed on display unit  1202 ; and display enabling unit  1224  for enabling the display of content on display unit  1204 . 
     In some embodiments, processing unit  1214  is configured to: enable display (e.g., with display enabling unit  1224 ) via a first portion of display unit  1202 , of a first digital viewfinder showing content from first camera  1208 , and enable display (e.g., with display enabling unit  1224 ) via a second portion of display unit  1202 , of a second digital viewfinder, the second digital viewfinder displaying content from second camera  1210 ; detect (e.g., with input detection unit  1216 ), a first input representing an instruction to zoom the first digital viewfinder; in response to detecting the first input, zoom the first digital viewfinder independently of the second digital viewfinder (e.g., with viewfinder zooming unit  1218 ); detect (e.g., with input detection unit  1216 ), a second input representing an instruction to freeze the first digital viewfinder; and in response to detecting the second input, freeze (e.g., with viewfinder freezing unit  1220 ) the first digital viewfinder independently of the second digital viewfinder. 
     In some embodiments, the first input is a de-pinching input located on a portion of touch-sensitive surface unit  1204  corresponding to the first digital viewfinder displayed on display unit  1202 . 
     In some embodiments, processing unit  1214  is configured to: enable display (e.g., with display enabling unit  1224 ), via display unit  1202 , of the first digital viewfinder by enabling a display of an affordance providing visual indication of a zoom setting; and detect (e.g., with input detection unit  1216 ), a touch movement at a location of touch-sensitive surface unit  1204  corresponding to the affordance providing visual indication of the zoom setting. 
     In some embodiments, processing unit  1214  is configured to detect (e.g., with input detection unit  1216 ) a third input at a location of touch-sensitive surface unit  1204  corresponding to the first digital viewfinder; and in response to detecting the third input, pan (e.g., with viewfinder panning unit  1220 ) the first digital viewfinder independently of the second digital viewfinder. 
     In some embodiments, the first input is a touch input on touch-sensitive surface unit  1204  and the second input is a release of the first input. In some embodiments, the second input is a tap at a location of touch-sensitive surface unit  1204  corresponding to the first digital viewfinder. 
     In some embodiments, processing unit  1214  is configured to: freeze (e.g., with viewfinder freezing unit  1222 ) the first digital viewfinder by displaying in the first digital viewfinder a still image received using first camera  1208 ; and detect (e.g., through input detection unit  1216 ) a fourth input, where visual media storing unit  1212  is configured to, in response to detecting the fourth input, add a combined digital image comprising the still image and a second image received from second camera  1210  to a library of images (e.g., using visual media storage unit  1212 ). 
     In some embodiments, the combined digital image is an image comprising the first image and the second image side-by-side. 
     In some embodiments, first camera  1208  has a first focal length and second camera  1210  has a second focal length different from the first focal length. In some embodiments, first camera  1208  has a fixed focal length and second camera  1210  has a fixed focal length. In some embodiments, second camera  1210  has a longer focal length than first camera  1208 . In some embodiments, first camera  1208  and second camera  1210  have overlapping fields of view. In some embodiments, the fields of view of first camera  1208  and second camera  1210  overlap by at least fifty percent. 
     In some embodiments, processing unit  1214  is configured to: detect (e.g., with input detection unit  1216 ) a fifth input at a location of the touch-sensitive surface corresponding to the first digital viewfinder, after freezing (e.g., with viewfinder freezing unit  1222 ) the first digital viewfinder; and in response to detecting the fifth input, unfreeze (e.g., with viewfinder freezing unit  1222 ) the first digital viewfinder and displaying (e.g., with display enabling unit  1224 ) content from first camera  1208  in the first digital viewfinder. 
     The operations described above with respect to  FIG. 9 , optionally, implemented by components depicted in  FIGS. 1A-1B, 3 , or  FIG. 12 . For example, detecting operation  904  and detecting operation  906  are, optionally, implemented by event sorter  170 , event recognizer  180 , and event handler  190 . Event monitor  171  in event sorter  170  detects user input on an input device, and event dispatcher module  174  delivers the event information to application  143 . A respective event recognizer  180  of application  143  compares the event information to respective event definitions  186 , and determines whether the input represents an instruction to manipulate a viewfinder. When a respective event or sub-event is detected, event recognizer  180  activates an event handler  190 , which may use or call data updater  176 , object updater  177 , or GUI updater  178  to perform corresponding application updates. It would be clear to a person of ordinary skill in the art how other processes can be implemented based on the components depicted in  FIGS. 1A-1B  and/or  FIG. 3 . 
     It is understood by persons of skill in the art that the functional blocks described in  FIG. 12  are, optionally, combined or separated into sub-blocks to implement the principles of the various described embodiments. Therefore, the description herein optionally supports any possible combination or separation or further definition of the functional blocks described herein. For example, units  1202 - 1212  can have associated “controller” units that are operatively coupled with the respective unit and processing unit  1214  to enable operation. These controller units are not separately illustrated in  FIG. 12  but are understood to be within the grasp of one of ordinary skill in the art who is designing a device having units  1202 - 1212  such as device  1200 . The description herein thus optionally supports combination, separation, and/or further definition of the functional blocks described herein. 
     In accordance with some embodiments,  FIG. 13  shows a functional block diagram of an electronic device  1300  configured in accordance with the principles of the various described embodiments. The functional blocks of the device are, optionally, implemented by hardware, software, or a combination of hardware and software to carry out the principles of the various described embodiments, including those described with reference to the user interfaces of  FIG. 7 . 
     As seen in  FIG. 13 , exemplary electronic device  1300  includes display unit  1302  configured to display graphical objects including the digital viewfinders described above; input interface unit  1304  configured to detect user input. Optionally, device  1300  includes touch-sensitive surface unit  1306  either as part of or operatively coupled to input interface unit  1304  configured to detect touch input. In some embodiments, touch-sensitive surface unit  1306 , when present, is separate from display unit  1302 . In some embodiments, touch-sensitive surface unit  1306 , when present, forms a touch screen with display unit  1302 . Device  1300  also includes camera units  1306  and  1308  configured to capture visual content; memory unit  1310  configured to store content captured by one or more of the cameras; and visual media capturing unit  1312  configured to capture visual media such as videos and/or images (and optionally, non-visual media such as audio). Device  1300  also includes processing unit  1314 . In some embodiments processing unit  1314  supports an input detection unit  1316  that is configured to detect input via input interface unit  1306 ; viewfinder zooming unit  1318  configured to provide zooming features for digital viewfinder(s) displayed via display unit  1302 ; viewfinder panning unit  1320  configured to pan the contents of digital viewfinder(s) displayed via display unit  1302 ; recording unit  1322  configured to record visual media (and optionally non-visual media) using first camera  1308  and/or second camera  1310 ; playback unit  1324  for playing back recorded media; and display enabling unit  1326  for enabling the display of content in display unit  1302 . 
     In some embodiments, processing unit  1314  is configured to: enable display (e.g., with display enabling unit  1326 ), via a first portion of display unit  1302 , of a first digital viewfinder, the first digital viewfinder displaying content from first camera  1308 ; enable display (e.g., with display enabling unit  1326 ), via a second portion of the display unit, of a second digital viewfinder, the second digital viewfinder displaying content from second camera  1310 ; detect (e.g., with input detection unit  1316 ), a first input. In response to detecting the first input, visual media storing unit  1312  is configured to concurrently store first visual media using content from first camera  1308  and store second visual media using content from second camera  1310 , where first camera  1308  and second camera  1310  have overlapping fields of view, and where the first visual media and the second visual media have different visual characteristics. 
     In some embodiments, the different visual characteristics comprise different frame rates. In some embodiments, the different visual characteristics comprise different resolutions. In some embodiments, the different visual characteristics comprise different digital filters. 
     In some embodiments, the fields of view of first camera  1308  and second camera  1310  overlap by at least fifty percent. In some embodiments, first camera  1308  has a first focal length and second camera  1310  has a second focal length different than the first focal length. In some embodiments, first camera  1308  has a fixed focal length and second camera  1310  has a fixed focal length. In some embodiments, second camera  1310  has a longer focal length than first camera  1308 . 
     In some embodiments, visual media storing unit  1312  is configured to concurrently store the first visual media and the second visual media by: storing a still image using content from first camera  1308 , and storing a video using content from second camera  1310  (e.g., with visual media storage unit  1312 ). 
     In some embodiments, processing unit  1314  is configured to: enable display (e.g., with display enabling unit  1326 ), via display unit  1302 , of a collection of affordances representing stored visual media, the collection comprising an affordance for initiating playback (e.g., with playback unit  1324 ) of the second visual media, where the affordance comprises an image of the first visual media. 
     In some embodiments, processing unit  1314  is configured to: enable display (e.g., with display enabling unit  1326 ), via display unit  1302 , of the first visual media in the first portion of display unit  1302  and simultaneously display the second visual media in the second portion of display unit  1302 . 
     In some embodiments, processing unit  1314  is configured to: while concurrently storing the first visual media and the second visual media, store (e.g., with visual media storing unit  1312 ) non-visual media; and associate the non-visual media with the first visual media and the second visual media (e.g., with visual media storing unit  1312 ). 
     The operations described above with respect to  FIG. 10 , optionally, implemented by components depicted in  FIGS. 1A-1B, 3 , or  FIG. 13 . For example, detecting operation  1006  is, optionally, implemented by event sorter  170 , event recognizer  180 , and event handler  190 . Event monitor  171  in event sorter  170  detects user input on an input device, and event dispatcher module  174  delivers the event information to application  143 . A respective event recognizer  180  of application  143  compares the event information to respective event definitions  186 , and determines whether the input represents an instruction to store viewfinder(s) content. When a respective event or sub-event is detected, event recognizer  180  activates an event handler  190 , which may use or call data updater  176 , object updater  177 , or GUI updater  178  to perform corresponding application updates. It would be clear to a person of ordinary skill in the art how other processes can be implemented based on the components depicted in  FIGS. 1A-1B  and/or  FIG. 3 . 
     It is understood by persons of skill in the art that the functional blocks described in  FIG. 13  are, optionally, combined or separated into sub-blocks to implement the principles of the various described embodiments. Therefore, the description herein optionally supports any possible combination or separation or further definition of the functional blocks described herein. For example, units  1302 - 1312  can have associated “controller” units that are operatively coupled with the respective unit and processing unit  1314  to enable operation. These controller units are not separately illustrated in  FIG. 13  but are understood to be within the grasp of one of ordinary skill in the art who is designing a device having units  1302 - 1312  such as device  1300 . The description herein thus optionally supports combination, separation, and/or further definition of the functional blocks described herein. 
     Although the disclosure and examples have been fully described with reference to the accompanying figures, it is to be noted that various changes and modifications will become apparent to those skilled in the art. Such changes and modifications are to be understood as being included within the scope of the disclosure and examples as defined by the appended claims.

Metadata:
Filing Date: 20210823
Publication Date: 20221101
Grant Date: 20221101
Priority Date: 20150423
Inventors: BERNSTEIN, JEFFREY TRAER
GIRLING, LUKAS ROBERT TOM
DONG, LINDA L.
PENHA, HENRIQUE
LOPEZ, PAULO MICHAELO
MANZARI, Behkish J.
Assignee: APPLE INC
CPC Classifications: [{"code": "H04N23/632", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04N23/633", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N23/633", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N23/632", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N23/69", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04N23/69", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N23/90", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N23/90", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N23/69", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N23/633", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N23/632", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N23/90", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F3/04842", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F2203/04806", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F3/04842", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F3/04883", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F2203/04806", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F3/04842", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N13/25", "inventive": true, "first": true, "tree": "[]"}, {"code": "G06F3/04883", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F2203/04806", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F3/04883", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N13/25", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N13/25", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N5/232939", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F3/04883", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N5/232935", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F2203/04806", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04N5/23296", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04N5/247", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F3/04842", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04N13/25", "inventive": true, "first": false, "tree": "[]"}]
Family ID: 57143588