Abstract:
An application for a device that includes an image sensor, an orientation sensor and image capture capabilities. Operation of the device is based upon a detected orientation of the device by the orientation sensor. In one embodiment, when the device is in a horizontal orientation, the image capture operates as a digital still image camera and when the device is in a vertical orientation, the image capture operates as a digital video camera. Other orientations are anticipated including upside down as well as other operating modes such as flash enabled and flash disabled. Optionally, a control is provided to lock the operation in one of the modes irrespective of changes in the orientation of the device.

Description:
FIELD 
     This invention relates to the field of digital photography and more particularly to a system that utilizes orientation to configure an operating mode of an internal imaging device. 
     BACKGROUND 
     Photography has evolved from the early cameras using film plates, to cut sheets of film and later to standardized rolled film. Each step made photography more available to just about any user. Although still in use, mostly for professional photography, film cameras are quickly becoming a thing of the past. 
     An image sensor called a charge-coupled device was invented in 1969 at AT&amp;T Bell Labs by Willard Boyle and George E. Smith and in shortly afterwards, Bell researchers made a charge-coupled device that could capture an image. These early devices were only capable of capturing images of a few hundred pixels, but these devices were truly the beginning of digital photography. 
     Today, the image sensors are capable of capturing images with resolutions containing over 10 million pixels (megapixels) and each pixel portraying up to 24 bits of color depth (e.g. using color filters and three image sensors). 
     Such image sensing enables current camera technology, but other technology shifts were required to make it as useful as it is today. One such technology is storage. Without compression, an image of 10 megapixels with 24 bit color depth requires 30 megabytes of storage. Fortunately, compression techniques have advanced to reduce this to closer to 3-5 megabytes per image. The compression requires significant processing resources while the storage of multiple images requires large amounts of storage. Improvements in processing, providing the performance needed to capture and compress images along with state memory such as solid state memory (e.g. Flash memory) or miniature rotating memory such as micro-hard disks. These technologies provided sufficient performance and storage for complete digital cameras that have become very affordable. Furthermore, advances in battery technology, such as lithium-ion, provides smaller, long-lasting power for these digital cameras. 
     Today, most digital cameras and many non-camera devices such as cellular phones have at least 4 gigabytes of storage and capture images with resolutions of from 2 megapixels to 16 megapixels. Many cell phones have integrated cameras capable of capturing still images and motion video. 
     There are two basic types of digital capture, still image capture and video capture. Digital still image cameras are usually capable of capturing motion video, but are not optimized for such. Likewise, video cameras are usually capable of capturing still images, but are optimized for motion video. These optimizations include physical features such as the size and shape, placement of the controls, view finders, holding straps, zoom controls, etc. In some examples, the optimizations include memory size, memory type, configuration, processor, battery, etc. 
     In general, to use a digital still image device to capture motion video, the user must set a control, either by a switch or through a menu. A similar operation is performed to use a digital video camera to take still images. When switching back and forth between still images and video, changing the control often becomes difficult due to the menu complexity or vision issues with switch settings, especially at night. For devices such as cellular phones, there is often a button to enter camera mode which, after operation, another button becomes the trigger, but the menu system must be used to change to video capture. 
     Still image cameras are often held differently than video cameras to promote a steady hand, whereas being steady isn&#39;t as important to be steady when taking video. 
     What is needed is a device that has image and video capabilities that detects how it is being held and automatically change between still digital imagery and video digital imagery. 
     SUMMARY 
     A device includes an image sensor and orientation sensor. Operation of the device is based upon a detected orientation of the device by the orientation sensor. In one embodiment, when the device is in a horizontal orientation, the device uses the image sensor to capture digital still images and when the device is in a vertical orientation, the device uses the image sensor to capture digital video. Other orientations are anticipated including upside down as well as other operating modes such as flash enabled and flash disabled. Optionally, a control is provided to lock the operation in one of the modes irrespective of changes in the orientation of the device. 
     In one embodiment, a device is disclosed including an image sensor optically interfaced to a lens and a processor electrically interfaced to the image sensor. The device has an orientation sensor also interfaced to the processor. A program running on the processor reads a value from the orientation sensor and sets a configuration of the device based upon the value. 
     In another embodiment, a method of controlling a configuration of a device is disclosed including reading an orientation sensor. If the orientation sensor indicates a first orientation, the configuration of the device is set to a first configuration; and if the orientation sensor indicates a second orientation, the configuration of the device is set to a second configuration. 
     In another embodiment, a device is disclosed including an image sensor optically interfaced to a lens with a processor electrically interfaced to the image sensor. A display, memory, and a lock control are electrically interfaced to the processor. An orientation sensor is interfaced to the processor and a program running within the processor reads a value from the orientation sensor and sets a configuration of the device based upon the value to either a still image configuration in which the processor captures still images from the image sensor and stores the still images in the memory or a video configuration in which the processor captures a series of frames from the image sensor and stores the frames as video in the memory. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention can be best understood by those having ordinary skill in the art by reference to the following detailed description when considered in conjunction with the accompanying drawings in which: 
         FIG. 1  illustrates a digital video camera of the prior art. 
         FIG. 2  illustrates a digital still image camera of the prior art. 
         FIG. 3  illustrates a combination digital device in a horizontal orientation. 
         FIG. 4  illustrates the combination digital device in a vertical orientation. 
         FIG. 5  illustrates a schematic view of a typical combination digital device. 
         FIG. 6  illustrates a flow chart of the combination digital device. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to the presently preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Throughout the following detailed description, the same reference numerals refer to the same elements in all figures. Any size, shape or configuration of device is anticipated including digital cameras integrated into other devices such as cellular phones. It is anticipated that the orientation sensor is either a discrete sensor such as an accelerometer or mercury-filled switch or integrated into another component of the camera such as using the image sensor to determine orientation. In the latter, image analysis is used to determine orientation, for example, finding a person&#39;s eyes and making assumptions that the eyes are in a vertical plane, etc. 
     Referring to  FIG. 1 , a digital video camera  10  of the prior art will be described. The digital video camera  10  has a lens  15  through which an image is projected internally onto one or more image sensors (e.g. CCDs not shown). Some digital video cameras  10  of the prior art have view finders. This example uses a small display screen  12  to show the image that is visible through the lens  15  on the image sensor. The exemplary digital video camera  10  has a start/stop control  14  for stopping or pausing of the capture of the motion video. 
     Referring to  FIG. 2 , a digital still image camera  16  of the prior art will be described. The digital still image camera  16  has a lens (not visible) through which an image is projected internally onto one or more image sensors (e.g. CCDs not shown). Some digital still image camera  16  of the prior art have view finders  19 . Some use a small display screen  18  to show the image that is visible through the lens on the image sensor. The exemplary digital still image camera  16  has a shutter control  17  for initiating the capture of an image. 
     Referring to  FIGS. 3 and 4 , a combination digital camera or other device  20  in a horizontal orientation ( FIG. 3 ) and a vertical orientation ( FIG. 4 ) will be described. The device  20  has an internal orientation sensor  102  (see  FIG. 5 ) that detects whether the device  20  is being held in the horizontal orientation (as in  FIG. 3 ) or the vertical orientation (as in  FIG. 4 ). When in the horizontal orientation, the device  20  is configured one configuration, for example as a still image camera. When the device  20  is held in the vertical orientation, the device  20  is configured in a different configuration, for example as a motion video camera. 
     In the horizontal orientation ( FIG. 3 ), the shutter control  22  us used to initiate capture of a still image  32  on the display  30 . Other exemplary controls are present such as zoom in/out and menu controls  26 , although there is no limitations as to what controls  26  are present. In the vertical orientation ( FIG. 4 ), an alternate shutter control  24  is used to initiate capture of a video image  33  on the display  30 , although the primary shutter control  22  is used in some embodiments. The same exemplary controls are present such as zoom in/out and menu controls  26 . 
     In some embodiments, a lock control  34  is provided to lock the camera  20  in either the still image configuration of the motion video configuration. For example, when the lock control  34  is unlocked and the camera  20  is held horizontally, the camera  20  is configured to take still images. If then, the lock control  34  is moved to the lock position, then, even if the camera  20  is rotated to the vertical position, the camera  20  continues to take still images  32  instead of taking video images  33 . Any type of lock control  34  is anticipated including slide switches, buttons and on-screen menus. 
     In one embodiment, the device  20  is a cellular phone  20  and, when held in portrait orientation, the device  20  functions as a cellular phone and when held in landscape orientation, the device  20  functions as a camera. In some versions of this embodiment, when rotated in one direction (e.g. right side of the phone  20  is up), the device  20  operates as a still image camera and when rotated in the opposite direction (e.g. left side of the phone  20  is up), the device  20  operates as a video camera. In some embodiments, there are user interface controls to lock out the camera feature and to set which rotation direction corresponds to still imaging and which rotation direction corresponds to video imaging. 
     Referring to  FIG. 5 , a schematic view of a typical combination digital camera  20  or digital camera section of a device  20  such as a cellular phone, etc, will be described. 
     The camera  20  has processor  100  for controlling operation of the camera  20  and for capturing, compressing and storing images and/or video. One or more image sensors  110  (e.g. charge-coupled device) are interfaced to the processor for capturing a still image or a frame of a video movie. The processor  100  captures the image  32  and/or frames  33 , processes them and stores them in a memory  104 . Any type and size of memory  104  is anticipated including, but not limited to, internal or external flash, micro hard drives, other semiconductor memory, rotating memory (e.g., CD-RW), etc. In some embodiments, a display  30  is interfaced to the processor for displaying captured images  32  and/or video  33 , for use as a view finder and/or for displaying menus and status of the camera  20 . 
     An internal orientation sensor  102  is interfaced to the processor  100  and detects whether the camera  20  is being held in the horizontal orientation (as in  FIG. 3 ) or the vertical orientation (as in  FIG. 4 ). When the camera  20  is in the horizontal orientation, the orientation sensor  102  signals the processor of such and the processor configures the camera  20  in a first configuration, for example as a still image camera. When the camera  20  is in the vertical orientation, the orientation sensor  102  signals the processor of such and the processor configures the camera  20  in a second configuration, for example as a motion video camera. 
     Various controls  22 / 24 / 26  are interfaced to the processor  100  including, but not limited to, one or more triggers  22 / 24 . The triggers  22 / 24 , in the first configuration, initiate the capture of a still digital image and, in the second configuration, start and stop (or pause) the capture of a digital video. 
     In some embodiments, some or all of the memory  104  is removable, for example, Compact Flash or SD Flash memory cards. In such, the images and/or video are transferred to a computer system (not shown) by removing the memory card  104  and placing it in a memory card interface of the computer. In some embodiments, an input/output port  106  is provided such as Universal Serial Bus (USB) or Firewire for connecting the camera  20  to a computer to transfer the images and/or video from the camera memory  104  to the computer memory. 
     In some embodiments, a lock control  34  is interfaced to the processor  100 . The lock control  34  locks signals the processor to lock the configuration of the camera  20  in either the still image configuration of the motion video configuration. For example, when the lock control  34  is unlocked and the camera  20  is held horizontally, the processor  100  configures the camera  20  to take still images. Now, if the lock control  34  is moved to the lock position; the processor maintains the current configuration even if the camera  20  is rotated to the vertical position. In this, the camera  20  continues to take still images  32  instead of taking video images  33 . Any type of lock control  34  is anticipated including slide switches, buttons and on-screen menus. 
     Referring to  FIG. 6 , a flow chart of the combination digital camera will be described. This flow is executed in, for example, the processor  100  periodically or based upon an interrupt. First, the lock control  34  is read  200  to determine if the configuration of the camera  20  is locked. If the lock control  34  is not off (e.g. it is locked), the previously saved configuration is loaded  228  and the mode is set to the previous mode  230  (e.g. maintains the previous configuration independent of the orientation sensor  102 ). If the lock control  34  is off (e.g. it is unlocked), the orientation sensor  102  is read  204  to determine the orientation of the camera  20 . If the orientation is horizontal  206 , the configuration is set to, for example, still image mode  218  and saved  220  in case the lock control  34  is set to the lock position. If the orientation is vertical  206 , the configuration is set, for example to motion video mode  208  and saved  210  in case the lock control  34  is set to the lock position. 
     Although the prior explanation maps horizontal orientation to still image photography and vertical orientation to video photography, it is anticipate that in some embodiments, the opposite relationship is maintained. Furthermore, it is also anticipated that other configuration changes occur based upon orientation, not necessarily still or motion capture. For example, in one orientation, the flash is enabled while in the other orientation; the flash is disabled, providing for quickly alternating between flash shots in one orientation and non-flash shots in the other. Other orientations are also anticipated such as rotating 180 degrees (upside down). For example, in one orientation, the flash is enabled and when turned upside down, the flash is disabled. This provides for quickly alternating between flash shots in one orientation and non-flash shots when held upside down while maintaining the same aspect ratio. 
     Equivalent elements can be substituted for the ones set forth above such that they perform in substantially the same manner in substantially the same way for achieving substantially the same result. 
     It is believed that the system and method and many of its attendant advantages will be understood by the foregoing description. It is also believed that it will be apparent that various changes may be made in the form, construction and arrangement of the components thereof without departing from the scope and spirit of the invention or without sacrificing all of its material advantages. The form herein before described being merely exemplary and explanatory embodiment thereof. It is the intention of the following claims to encompass and include such changes.