Patent Publication Number: US-2017357312-A1

Title: Facilitating scanning of protected resources

Description:
BACKGROUND 
     Displays of media devices (e.g., mobile phones, tablets, media players, personal digital assistants (PDA), etc.) may be utilized to present media (e.g., video, images, documents, text, etc.) to a user. For example, a user may watch videos, view images, etc. using a media device. The display may be a touchscreen, a light emitting diode (LED) display, an organic LED (OLED) display, a liquid crystal display (LCD), or any other suitable type of display. The media devices may also include a camera or other sensors, such as depth sensors, accelerometers, etc. The example camera of the media device may adjust settings to exposure of images captured by the camera (e.g., wide angle, straight view, panoramic etc.). 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates an example environment in which a media device including an example virtual display projector may be implemented in accordance with an aspect of this disclosure. 
         FIG. 2  is a block diagram of an example implementation of the example media device of  FIG. 1  that includes an example virtual display projector constructed in accordance with an aspect of this disclosure. 
         FIG. 3  is a block diagram of an example virtual display projector that may be used to implement the virtual display projector of  FIG. 2 . 
         FIGS. 4A, 4B, and 4C  illustrate an example virtual display projection implemented by the example virtual display projector of  FIG. 2 or 3 . 
         FIGS. 5A and 5B  illustrate an example virtual display projection onto a target surface based on a distance between a user and a media device implementing the virtual display projector of  FIG. 2 or 3 . 
         FIG. 6  is a flowchart representative of example machine readable instructions that may be executed to implement the virtual display projector of  FIG. 3 . 
         FIG. 7  is a block diagram of an example processor platform capable of executing the instructions of  FIG. 6  to implement the virtual display projector of  FIG. 3 . 
     
    
    
     Wherever possible, the same reference numbers will be used throughout the drawing(s) and accompanying written description to refer to the same or like parts. As used in this patent, stating that any part (e.g., a layer, film, area, or plate) is in any way positioned on (e.g., positioned on, located on, disposed on, or formed on, etc.) another part, means that the referenced part is either in contact with the other part, or that the referenced part is above the other part with at least one intermediate part located therebetween. Stating that any part is in contact with another part means that there is no intermediate part between the two parts. 
     DETAILED DESCRIPTION 
     Examples disclosed herein involve projecting a virtual display on a display of a media device. In examples disclosed herein, a target surface is identified in an image stream (or video capture) from a camera and media is projected onto the target surface within the image stream and presented on a display of the media device. In examples disclosed herein, the projection of the virtual display may be adjusted based on a position of a user or a position of the media device relative to the identified target surface. In examples disclosed herein, camera settings may be adjusted to project the virtual display on the target surface within the image stream such that the media appears to be projected onto the target surface when viewed on a display of the media device. In some examples, the projected virtual display may appear static such that when a user moves or the media device moves, the projected virtual display on the target surface does not appear to move. In examples disclosed herein, the virtual display projected on the target surface may allow portions of the media to be viewable or not to be viewable on the display of the media device depending on the movement of the user or the movement of the media device relative to the virtual display on, the target surface. 
     Users frequently view media using handheld devices having a relatively small screen (e.g., less than 20 inches). For example, a user may choose to read a book or watch a movie on a mobile device that has less than a five inch display. Examples disclosed herein create an optical illusion of enhancing a size of media presented on a display of a media device (e.g., a smartphone, a media player, a tablet computer, a personal digital assistant (PDA), etc.). An example virtual display projector augments media onto a target surface of an image stream from a camera of the media device. For example, the camera streams an image of a wall or desk top. In such an example, the wall or desktop may serve as a target surface on which the virtual display projector may project the media in accordance with the teachings of this disclosure. Projection of the media on the virtual surface may give the user a perception of an increased size of the display on the media device. In some examples, the virtual projection displayed on the display of the media device may be adjusted based on a position of a user or a position of the media device relative to the identified target surface. 
     An example method includes determining a position of a user viewing a display of a media device; identifying a target surface for a virtual display in an image stream from a camera of the media device; adjusting settings for the camera based on the position of the user; and presenting the image stream to include the virtual display appearing on the target surface based on the position of the user and the position of the media device 
     As used herein, a target surface may be any identifiable surface within an image or image stream (video). An example target surface may have a specified border or boundary or be borderless or have no boundaries. As used herein, a virtual projection of media or virtually projecting media refers to an augmentation or augmenting the media onto a display or within an image stream presented by a display. As used herein, a front-facing camera is a camera on a media device focused toward the same side of the media device as a corresponding display of the media device and a rear-facing camera is a camera on the media device focused on a side of the media device opposite a display. Accordingly, an image stream from a rear-facing camera may give the user the optical illusion of being able to view through the display of the media device such that the media device appears transparent (e.g., similar to a window). 
       FIG. 1  illustrates an example environment  100  in which a media device  110  including an example virtual display projector  120  may be implemented. In  FIG. 1 , the environment  100  includes a room  102  with a wall  104 . In the illustrated example of  FIG. 1 , the virtual display projector  120  of the media device may identify the wall  104  as a target surface for projecting a virtual display on a display  112  of the media device  110 . 
     In the illustrated example of  FIG. 1 , the example media device  110  includes a display  112 , a front-facing camera  114 , and the virtual display projector  120 . The example media device  110  may by any type of media device  110 , such as a smartphone, a tablet computer, a personal digital assistant (PDA), an mp3 player, etc. The media device  110  also includes a rear-facing camera on an opposing side of the media device  110  as the display  112 . Accordingly, the rear-facing camera may capture an image of the wall while the front-facing camera  114  may capture an image of a user or anything on the same side of the media device  110  as the display. The example display  112  of the media device may be any type of display, such as a light emitting diode (LED) display, an organic LED (OLED) display, a liquid crystal display, or the like. Accordingly, the display may include a substrate layer (e.g., glass or plastic), a pixel layer (e.g., including an array of LEDs, an array of liquid crystal etc.), a reflection layer, a back plate, or any layer for implementing the display  112  of the media device  110 . Accordingly, in examples disclosed herein, the display  112  may be a non-transparent display. 
     In the illustrated example of  FIG. 1  a target surface  106  of the wall  104  (or target surface) is indicated as a location for virtual display projection in accordance with the teachings of this disclosure. In examples disclosed herein, the rear-facing camera of the media device  110  may identify the target surface  106  (e.g., a portion of the wall  104 ) to project a virtual display in an image stream to appear in or on the target surface. In some examples, the target surface may include an identifiable border (e.g., a frame of a screen or picture, a perimeter of a wall, etc.). The image stream may come from the rear-facing camera of the media device  110 . Accordingly, the image stream may include media to be virtually projected on the target surface  106 . For example, a user may view a video within or on the target surface  106  in an image stream from the rear-facing camera of the media device  110  on the display  112 . 
     In examples disclosed herein, the virtual display projector  120  may determine a location of a user or a location of the media device  110  to identify a desired (e.g., a preferred or even best) target surface  106  for projection of a virtual display of media in an image stream from a camera of the media device  110 . In some examples, the virtual display projector  120  may adjust camera settings based on a position of the user (e.g., a position relative to the media device  110 ) or a position of the media device  110  (e.g., relative to the target surface). 
     In examples disclosed herein, the example virtual display projector  120  may be implemented by a device located within (a storage medium or processor) or on the media device  110 . In some examples, the virtual display projector  120  may be implemented by an application or other instructions executed by a machine (e.g., a processor) of the media device  110 . Although the virtual display projector  120  is located on or within the media device  110  of  FIG. 1 , additionally or alternatively, the virtual display projector  120  may be partially or entirely located on an external device (e.g., a local server, a cloud server, etc.). In such examples, the virtual display projector  120  may receive information (e.g., user position, device position, an image stream, etc.) from the media device, insert a projected virtual display of media (e.g., a video, an image, a document, etc.) within an image stream of the media device  110 , and return the image stream with the projected virtual display of the media to the user device. An example implementation of the virtual display projector  120  is disclosed below in connection with  FIG. 3 . 
       FIG. 2  is a block diagram of an example media device  110  that may be used to implement the media device  110  of  FIG. 1 . The example media device  110  of  FIG. 2  includes a user interface  210 , a camera controller  220 , a sensor manager  230 , a media manager  240 , a display  112 , and the virtual display projector  120 . In examples disclosed herein, the virtual display projector  120  may receive information from the user interface  210 , camera controller  220 , and sensor manager  230  to generate a virtual display of media from the media manager  230  be projected within an image on the display  112 . An example implementation of the virtual display projector  120  is further disclosed below in connection with  FIG. 3 . 
     The example user interface  210  of  FIG. 2  enables a user to access the media device  110 . For example, a user may activate or initiate the virtual display projector  120  (e.g., by selecting an icon, opening an application, powering on the media device  110 , etc.). The example user interface  210  may include a touchscreen, buttons, a mouse, a track pad, etc. for controlling the media device  110 . In some examples, the user interface  210  and the display  112  may be implemented by or associated with a same device (e.g., a touchscreen). The example user interface  210  may be used to select media to be virtually projected in an image stream as disclosed herein or used to select a target surface to be used to virtually project the selected media. 
     The camera controller  220  in the example of  FIG. 2  controls a camera or a plurality of cameras of the media device  110 . For example, the camera controller  220  may control settings (e.g., zoom, resolution, shutter speed, etc.) of one or a plurality of cameras (e.g., a front-facing camera and a rear-facing camera). In examples disclosed herein, the camera controller  220  may receive instructions or communicate with the virtual display projector  120  to adjust the settings of the camera(s) of the media device  110 . For example, the camera controller  220  may adjust a zoom or view of a rear-facing camera of the media device from a wide angle zoom to a straight view. As another example, the camera controller  220  may receive instructions from the virtual display projector  120  to control a front-facing camera (i.e., a camera on the same side of a media device as a display of the media device) to capture images of a user or an eye gaze of the user. In examples disclosed herein, the camera controller  220  may receive the image(s) or image data from the camera(s) and provide the image(s) or image data to the virtual display projector  120  for analysis in accordance with the teachings of this disclosure. 
     The example sensor manager  230  may control sensors (e.g., a gyroscope, an accelerometer, a depth sensor, etc.) and receive measurement information from the sensors. For example, the sensor manager  230  may receive measurement information corresponding to a position or orientation information of the media device  110 . The example sensor manager  230  may forward such information to the virtual display projector  120  for analysis in accordance with the teachings of this disclosure. In some examples, the sensor manager  230  may receive instructions from the virtual display projector  120  to take certain measurements or provide measurements from a particular sensor of the media device  110 . 
     The example media manager  240  of  FIG. 2  manages media of the media device  110 . For example, the media manager  240  may include a database or storage device. The media manager  240  may facilitate retrieval of media (e.g., video, audio, images, text, documents, files, etc.) from the database or storage device and provide the media to the virtual display projector  120 . For example, a user may request, via the user interface  210 , to view media or stream media using the virtual display projector  120 . In such examples, the virtual display projector  120  may facilitate retrieval of media from the media manager  240  (e.g., by utilizing a graphical user interface of the virtual display projector  120  or the user interface  210 ). For example, the media manager  240  provides media to the virtual display projector  120  to virtually project (or augment) the media within an image stream from a camera of the media device  110 . In some examples, the media manager  240  is located externally from the media device  110  (e.g., on a cloud server). 
     The example display  112  of  FIG. 2  may be used to implement the display  112  of the media device  110  of  FIG. 1 . In some examples, the display  112  may be implemented by or in accordance with the user interface  210  (e.g., as a touchscreen of the user interface). In examples disclosed herein, the display  112  may present media (e.g., a video, an image, a document, text, etc.) that is virtually projected (or augmented) onto a target surface in an image stream from a camera. 
     While an example manner of implementing the media device  110  of  FIG. 1  is illustrated in  FIG. 2 , at least one of the elements, processes and/or devices illustrated in  FIG. 2  may be combined, divided, re-arranged, omitted, eliminated and/or implemented in any other way. Further, the display  112 , the virtual display projector  120 , the user interface  210 , the camera manager  220 , the sensor manager  230 , the media manager  240  or, more generally, the media device  110  of  FIG. 2  may be implemented by hardware and/or any combination of hardware and executable instructions (e.g., software and/or firmware). Thus, for example, any of the display  112 , the virtual display projector  120 , the user interface  210 , the camera manager  220 , the sensor manager  230 , the media manager  240  or, more generally, the media device  110  may be implemented by at least one of an analog or digital circuit, a logic circuit, a programmable processor, an application specific integrated circuit (ASIC), a programmable logic device (PLD) and/or a field programmable logic device (FPLD). When reading any of the apparatus or system claims of this disclosure to cover a software and/or firmware implementation, at least one of the display  112 , the virtual display projector  120 , the user interface  210 , the camera manager  220 , the sensor manager  230 , and the media manager  240  is/are hereby expressly defined to include a non-transitory tangible machine readable medium (e.g., a storage device or storage disk such as a memory, a digital versatile disk (DVD), a compact disk (CD), a Blu-ray disk, etc.) storing the executable instructions. An example machine may include a processor, a computer, etc. Further still, the example media device  110  of  FIG. 2  may include at least one element, process, and/or device in addition to, or instead of, those illustrated in  FIG. 2 , and/or may include more than one of any or all of the illustrated elements, processes and devices. 
       FIG. 3  is a block diagram of an example virtual display projector  120  that may be used to implement the virtual display projector  120  of  FIG. 1 or 2  in accordance with the teachings of this disclosure. The example virtual display projector  120  of  FIG. 3  includes a user position analyzer  310 , a device position analyzer  320 , a camera manager  330 , an image stream analyzer  340  and a virtual display calculator  350 . In examples disclosed herein, the virtual display projector  120  augments media onto a target surface or within a target area of the target surface within an image stream from a camera of a media device. In examples disclosed herein, the virtual display projector  120  may control a display of the media on the display  112  of the media device  110  such that the media appears to be projected onto the target surface. The virtual display projector  120  may control the display or camera settings of a camera (e.g., a rear-facing camera) providing the image stream based on a position of a user (or a user&#39;s eye gaze) or based on a position of the media device  110 . 
     The example user position analyzer  310  analyzes a position of a user. For example, the user position analyzer  310  may determine a position of a user&#39;s face or an eye gaze of the user. In examples disclosed herein, the user position analyzer  310  may analyze images from the camera manager  330  or a camera of the media device  110  to determine a position of the user relative to the display  112  or to an identified target surface for a virtual display. Such a camera may be a front-facing camera that captures images of a user located on a same side of the media device  110  as the display  112 . Accordingly, the user position analyzer  310  may include an image processor capable of recognizing or identifying a face or eyes (e.g., pupils, irises, etc.) of a user. By processing images of the user, the user position analyzer  310  may determine where a user is located relative to the display  112  or a direction of an eye gaze of the user. In examples disclosed herein, the user position analyzer  310  may determine a distance between the user and the display of the media device  112 . In examples disclosed herein, the user position analyzer  310  may provide information corresponding to a position of the user to the virtual display calculator  350  for analysis and calculation of a virtual display in accordance with the teachings of this disclosure. 
     The example device position analyzer  320  analyzes a position or orientation of the media device  110 . For example, the device position analyzer  320  may receive measurement information from sensors (e.g., gyroscopes, accelerometers, depth sensors, etc.) of the media device  110  via the sensor manager  230 . The device position analyzer  320  provides measurement information (e.g., position information, orientation information, location information, etc.) to the virtual display calculator  350  for analysis. In some examples, the device position analyzer  320  may determine position information relative to a user or position information relative to a target surface (e.g., the target surface  106 ). 
     In the illustrated example of  FIG. 3 , the camera manager  330  serves as an interface of the virtual display projector  120  to communicate with a camera controller (e.g., the camera controller  220 ) of the media device  110 . The example camera manager  330  may request an image stream from a camera (e.g. a rear-facing camera or camera on an opposite of the media device  110  as the display  112 ). The example image stream may be a continuous stream of images captured on a rear side of the media device (i.e., the side of the media device opposite the display  112 ). In examples disclosed herein, the image stream received by the virtual display projector  120  is used to virtually project or augment media onto a target surface (e.g., a wall, a desktop, a table, etc.) within the image stream. In examples disclosed herein, the camera manager  330  may monitor or receive measurement data from the user position analyzer  310  and the device position analyzer  320 . In examples disclosed herein, the camera manager  330  may instruct a camera (e.g., a rear-facing camera of the media device  110 ) to adjust settings for capturing an image stream displayed by the display  112 . For example, the closer a user is to the display  112 , the wider a zoom may be up to a threshold. For example, if the user is within 10 inches of the display or closer a wide angle capture setting is be used. On the other hand, the further a user gets from the display, a narrower zoom (e.g., 1× zoom) or narrow capture angle (e.g., straight view) may be used to capture images (or video) for the image stream. 
     The image stream analyzer  340  of the example virtual display projector  120  of  FIG. 3  analyzes an image stream from a camera (e.g., the rear-facing camera) of the media device  110 . The image stream analyzer  340  may identify a target surface or target area to augment a display. Accordingly, the image stream analyzer  340  may include an image processor to measure or detect surfaces (e.g., walls, furniture tops, floors, ceilings, monitors, frames, screens, windows, etc.) that may be target surfaces for a virtual display. In some examples, a user may indicate (e.g., by tapping a touchscreen of the user interface  210  or outlining an area of a target surface, such as a wall or tabletop, etc.) a target surface of the image stream to be used. Example techniques such as edge detection, entropy, or any other suitable image processing technique may be used to identify a target surface. The example image analyzer  340  may provide information corresponding to the target surface to the virtual display calculator  350 . For example the image stream analyzer  340  may provide characteristic information (e.g., coordinate location within the image stream, depth within the image stream, color, etc.) of the identified target surface in the image stream to the virtual display calculator  350 . Accordingly, the image stream analyzer  340  determines information that enables the virtual display calculator  350 , and thus the virtual display projector  120 , to focus a resolution of the virtual display (or of media of the virtual display) such that the virtual display appears at a same depth of the display  112  as the target surface. Thus, from the characteristic information provided by the image stream analyzer  340 , the virtual display projector  120  (e.g., via the virtual display calculator  350 ) may emulate (or simulate) a resolution for media (e.g., a video, an image, a document, an application, etc.) to be virtually displayed on the target surface in the image stream. 
     The example virtual display calculator  350  determines display settings for virtually projecting the media onto the target surface identified by the image analyzer  340 . In examples disclosed herein, the virtual display calculator  350  utilizes information from the user position analyzer  310 , the device position analyzer  320 , the camera manager  330 , and image stream analyzer  340  to calculate characteristics (e.g., position, shape, location, etc.) of a virtual display within the image stream. In examples disclosed herein, the virtual display calculator  350  monitors information from the user position analyzer  310 , the device position analyzer  320 , the camera manager  330 , and image stream analyzer  340  and alters a display output for the display  112  based on a position of the user or a position of the device relative to the determined target surface identified in the image stream. The virtual display calculator  350  continuously monitors information corresponding to movement of the user or the display in order to adjust a display output (e.g., by adjusting a location of the virtual display within the image stream) for the media device  110  to maintain projection of the virtual display on the target surface. In other words, the virtual display calculator  350  adjusts display settings such that the virtual display is rendered within the image stream to appear static on the display  112  relative to movement of the user or the media device  110 . In examples disclosed herein, the virtual display calculator  350  may focus or sharpen the projected virtual display within the image stream on the display  112  of the media device  110  in a similar fashion to a user&#39;s eyes refocusing between an object and a background of the object. Accordingly, in examples disclosed herein, the virtually projected display appears to be positioned on a target surface rather simply overlaying an image stream without any context of the background of the media device  110 . The example virtual display calculator  350  may use any suitable mathematical formulas or algorithms to determine appropriate display settings to render the virtual display on the target surface in accordance with the teachings of this disclosure. 
     While an example manner of implementing the virtual display projector  120  of  FIG. 1 or 2  is illustrated in  FIG. 3 , at least one of the elements, processes and/or devices illustrated in  FIG. 3  may be combined, divided, re-arranged, omitted, eliminated and/or implemented in any other way. Further, the user position analyzer  310 , the device position analyzer  320 , the camera manager  330 , the image stream analyzer  340 , the virtual display calculator  350  and/or, more generally, the example virtual display projector  120  of  FIG. 3  may be implemented by hardware and/or any combination of hardware and executable instructions (e.g., software and/or firmware). Thus, for example, any of the user position analyzer  310 , the device position analyzer  320 , the camera manager  330 , the image stream analyzer  340 , the virtual display calculator  350  and/or, more generally, the example virtual display projector  120  may be implemented by at least one of an analog or digital circuit, a logic circuit, a programmable processor, an application specific integrated circuit (ASIC), a programmable logic device (PLD) and/or a field programmable logic device (FPLD). When reading any of the apparatus or system claims of this disclosure to cover a purely software and/or firmware implementation, at least one of, the user position analyzer  310 , the device position analyzer  320 , the camera manager  330 , the image stream analyzer  340 , and the virtual display calculator  350  is/are hereby expressly defined to include a tangible machine readable storage device or storage disk such as a memory, a digital versatile disk (DVD), a compact disk (CD), a Blu-ray disk, etc. storing the executable instructions. Further still, the example virtual display projector  120  of  FIG. 3  may include at least one element, process, and/or device in addition to, or instead of, those illustrated in FIG. B, and/or may include more than one of any or all of the illustrated elements, processes and devices. 
       FIGS. 4A, 4B, and 4C  illustrate an example virtual display projection  400  implemented by the example virtual display projector of  FIG. 2 or 3 . In the illustrated examples of  FIGS. 4A and 4B , a media device  110  including the virtual display projector  120  is located at two different locations A and B, respectively, relative to the virtual display projection  400 . Additionally, it can be assumed that in the illustrated example of  FIGS. 4A and 4B , the media device  110  is positioned (e.g., held by a user) at the same distances between a user and the target surface  402 . In some examples, the media device  110  of  FIGS. 4A and 4B  may be positioned at different distances between the user and the target surface  402 . In  FIG. 4C , as indicated by the size of the media device  110 , it can be assumed that a user is positioned closer to the media device  110  than in  FIGS. 4A and 4B . Although, in some examples, the media device  110  of  FIG. 4C  may be positioned at a same distance as the media device  110  of  FIG. 4A or 4B . 
     In  FIGS. 4A, 4B, and 4C  the target surface  402  is identified against a background  410 , which may be anything that is captured in an image stream by a rear-facing camera of the media device  110 . For example, the target surface  402  may be a flat surface that is determined to be a particular distance from the media device  110  and the background may be the same flat surface, air, or any area that was not identified as a target surface. In examples disclosure herein, the target area  402  may be calculated or determined by an image stream analyzer (e.g., the image stream analyzer  340  based on characteristics of the target surface (e.g., size, distance from the media device  110 , etc.). In examples disclosed herein, the virtual display projection  400  of  FIGS. 4A-4C  may have a background color such that the user may recognize the virtual display projection  400  on the target surface  402  against the background  410 . In some examples, the virtual display projection may have a clear background such that the background  410  of the media device is visible on the target surface  402  except for the objects  404 ,  406 . 
     In  FIGS. 4A and 4B  the virtual display projector  120  generates the virtual display projection  400  on the target surface  402 . The example virtual display projection  400  in  FIGS. 4A and 4B  includes two objects, a square  404  and a circle  406 . In the illustrated example of  FIG. 4A , with the media device  110  located at position A, the display  112  of the media device  110  presents the circle  406  and but does not present the square  404  based on the position of the media device  110  relative to the target surface  402 . Additionally, in  FIG. 4A , the display  112  of the media device  110  presents a portion of the background  410  of the media device  110  as the media device is positioned over a portion of the target surface  402  that does not include the virtually projected display  400 . 
     In  FIG. 4B , if the media device  110  is moved to position B, the display  112  of the media device may present the square  404  but not the circle  406  as the media device  110  moved relative to the target surface  402 . In other words, the virtual display projector  120  maintains a static virtual display on the target surface  402  such that when a device is moved, different portions of media virtually projected onto the target surface may be viewed. Additionally, the virtual display projection  400  remains static against the background  410  as indicated by a portion of the background  410  of the media device  110  displayed on the display  112 . 
       FIG. 4C  illustrates the media device  110  at location C. In  FIG. 4C , the media device  110  is located closer to a user than in  FIGS. 4A and 4B  (as indicated by the size of the media device  110 ). Accordingly, based on the position of the media device  110  being closer to the user, the display  112  may present both the square  404  and the circle  406  along with a portion of the background  410 , such that the virtual display projection  400  appears augmented over the background  410  of the media device  110 . 
       FIGS. 5A and 5B  illustrate an example virtual display projection onto a target surface based on a distance between a user and a device implementing the virtual display projector of  FIG. 2 or 3 . In the illustrated example of  FIG. 5A , the user is viewing a virtual projection on a display  112  of a media device  110  which may be implemented by the display  112  and the media device  110  of  FIG. 2 , respectively. In  FIG. 5A , the user is located at a distance from the media device such that only a portion A of a virtual display  502  projected onto a target surface  504  can be seen. The example target surface  504  may be a wall. In the illustrated example of  FIG. 5A , an example user position analyzer (e.g., the user position analyzer  310 ) of a virtual display projector  120  may provide user position information (e.g., a distance between the user media device  110  to a virtual display calculator (e.g., the virtual display calculator  350 ) to determine a portion of the virtual display  502  that is to be presented on the display  112 . In some examples, in  FIG. 5A , a camera may adjust image stream settings to capture a narrow angle (e.g., straight view) of the target surface  504  such that the target surface  504  does not appear distorted in the image stream, and the display  112  presents a portion of the virtual display  502  that would appear to be framed by the media device  110  at that distance (e.g., such that the media device  110  appears to be translucent when viewing the display  112 ). 
     However, in the illustrated example of  FIG. 5B , the user is located closer to the media device  110 . Therefore, in such examples, the user may see a greater portion B of the virtual display  502  on the target surface  504  due to adjusting image stream settings by capturing wide angle images of the target surface  504 . The example target surface  504  of  FIG. 5B  may be a furniture top. As an example, in  FIG. 5B , the user may be using the media device  110  to read an article or document projected on the virtual display  502 . In  FIG. 5B , camera settings may be adjusted to widen a camera angle (or zoom out) such that when the user is viewing the virtual display  502 , more of the virtual display  502 , may be included and presented on the display  112  (e.g., so that the user may look “through” the device  112  to see a greater portion of the article or document by viewing the adjusted image stream). 
     A flowchart representative of example machine readable instructions for implementing the virtual display projector  120  of  FIG. 3  is shown in  FIG. 6 . In this example, the machine readable instructions comprise a program/process for execution by a machine, such as a processor (e.g., the processor  712  shown in the example processor platform  700  discussed below in connection with  FIG. 7 ). The program/process may be embodied in executable instructions (e.g., software) stored on a tangible machine readable storage medium such as a CD-ROM, a floppy disk, a hard drive, a digital versatile disk (DVD), a Blu-ray disk, or a memory associated with the processor  712 , but the entire program/process and/or parts thereof may alternatively be executed by a device other than the processor  712  and/or embodied in firmware or dedicated hardware. Further, although the example program is described with reference to the flowchart illustrated in  FIG. 6 , many other methods of implementing the example virtual display projector  120  may alternatively be used. For example, the order of execution of the blocks may be changed, and/or some of the blocks described may be changed, eliminated, or combined. 
     The example process  600  of  FIG. 6  begins with an initiation of the virtual display projector  120  (e.g., upon startup, upon instructions from a user, upon startup of a device implementing the virtual display projector  120  (e.g., the media device  110 ), etc.). At block  610 , the user position analyzer  310  determines a position of a user viewing a media device. For example, the position analyzer  310  may analyze images or sensor data (e.g., depth sensor data) to determine a location of a user or an eye gaze of the user. In some examples, at block  610 , the device position analyzer  320  may determine a position of the media device relative to the user or a target surface identified in an image stream. The image stream analyzer  340 , at block  620 , identifies a target surface for projecting a virtual display in an image stream. For example, at block  620 , the image stream may be from a rear-facing camera of the media device  110 . 
     At block  630  of  FIG. 6 , the camera manager  630  adjusts settings of an image stream (e.g., by adjust camera settings, such as zoom, resolution, etc.) based on the position of the user. For example, if a user is located within a threshold distance of the media device, the zoom for the camera may be set to 1× such that when viewing the display and an image of what is behind the media device (e.g., the target surface), there is minimal (or no) distortion. At block  640 , the virtual display calculator determines display characteristics such to present the image stream on a display to include the virtual display on the target surface. After block  640 , the example process  600  ends. 
     As mentioned above, the example processes of  FIG. 6  may be implemented using coded instructions (e.g., computer and/or machine readable instructions) stored on a tangible machine readable storage medium such as a hard disk drive, a flash memory, a read-only memory (ROM), a compact disk (CD), a digital versatile disk (DVD), a cache, a random-access memory (RAM) and/or any other storage device or storage disk in which information is stored for any duration (e.g., for extended time periods, permanently, for brief instances, for temporarily buffering, and/or for caching of the information). As used herein, the term tangible machine readable storage medium is expressly defined to include any type of machine readable storage device and/or storage disk and to exclude propagating signals and to exclude transmission media. As used herein, “tangible machine readable storage medium” and “tangible machine readable storage medium” are used interchangeably. Additionally or alternatively, the example processes of  FIG. 6  may be implemented using coded instructions (e.g., computer and/or machine readable instructions) stored on a non-transitory computer and/or machine readable medium such as a hard disk drive, a flash memory, a read-only memory, a compact disk, a digital versatile disk, a cache, a random-access memory and/or any other storage device or storage disk in which information is stored for any duration (e.g., for extended time periods, permanently, for brief instances, for temporarily buffering, and/or for caching of the information). As used herein, the term non-transitory machine readable medium is expressly defined to include any type of machine readable storage device and/or storage disk and to exclude propagating signals and to exclude transmission media. As used herein, when the phrase “at least” is used as the transition term in a preamble of a claim, it is open-ended in the same manner as the term “comprising” is open ended. As used herein the term “a” or “an” may mean “at least one,” and therefore, “a” or “an” do not necessarily limit a particular element to a single element when used to describe the element. As used herein, when the term “or” is used in a series, it is not, unless otherwise indicated, considered an “exclusive or.” 
       FIG. 7  is a block diagram of an example processor platform  700  capable of executing the instructions of  FIG. 6  to implement the virtual display projector  120  of  FIG. 3 . The example processor platform  700  may be any type of apparatus or may be included in any type of apparatus, such as a server, a personal computer, a mobile device (e.g., a cell phone, a smart phone, a tablet, etc.), a personal digital assistant (PDA), an Internet appliance, or any other type of computing device. 
     The processor platform  700  of the illustrated example of  FIG. 7  includes a processor  712 . The processor  712  of the illustrated example is hardware. For example, the processor  712  can be implemented by at least one integrated circuit, logic circuit, microprocessor or controller from any desired family or manufacturer. 
     The processor  712  of the illustrated example includes a local memory  713  (e.g., a cache). The processor  712  of the illustrated example is in communication with a main memory including a volatile memory  714  and a non-volatile memory  716  via a bus  718 . The volatile memory  714  may be it by Synchronous Dynamic Random Access Memory (SDRAM), Dynamic Random Access Memory (DRAM), RAMBUS Dynamic Random Access Memory (RDRAM) and/or any other type of random access memory device. The non-volatile memory  716  may be implemented by flash memory and/or any other desired type of memory device. Access to the main memory  714 ,  716  is controlled by a memory controller. 
     The processor platform  700  of the illustrated example also includes an interface circuit  720 . The interface circuit  720  may be implemented by any type of interface standard, such as an Ethernet interface, a universal serial bus (USB), and/or a peripheral component interconnect (PCI) express interface. 
     In the illustrated example, at least one input device  722  is connected to the interface circuit  720 . The input device(s)  722  permit(s) a user to enter data and commands into the processor  712 . The input device(s) can be implemented by, for example, an audio sensor, a microphone, a camera (still or video), a keyboard, a button, a mouse, a touchscreen, a track-pad, a trackball, isopoint and/or a voice recognition system. 
     At least one output device  724  is also connected to the interface circuit  720  of the illustrated example. The output device(s)  724  can be implemented, for example, by display devices (e.g., a light emitting diode (LED), an organic light emitting diode (OLED), a liquid crystal display, a touchscreen, a tactile output device, a light emitting diode (LED), a printer and/or speakers). The interface circuit  720  of the illustrated example, thus, may include a graphics driver card, a graphics driver chip or a graphics driver processor. 
     The interface circuit  720  of the illustrated example also includes a communication device such as a transmitter, a receiver, a transceiver, a modem and/or network interface card to facilitate exchange of data with external machines (e.g., computing devices of any kind) via a network  726  (e.g., an Ethernet connection, a digital subscriber line (DSL), a telephone line, coaxial cable, a cellular telephone system, etc.). 
     The processor platform  700  of the illustrated example also includes at least one mass storage device  728  for storing executable instructions (e.g., software) and/or data. Examples of such mass storage device(s)  728  include floppy disk drives, hard drive disks, compact disk drive, Blu-ray disk drives, RAID systems, and digital versatile disk (DVD) drives. 
     The coded instructions  732  of  FIG. 6  may be stored in the mass storage device  728 , in the local memory  713  in the volatile memory  714 , in the non-volatile memory  716 , and/or on a removable tangible machine readable storage medium such as a CD or DVD. 
     From the foregoing, it will be appreciated that the, above disclosed methods, apparatus and articles of manufacture provide for presenting, on a display of a media device, a virtual display on a target surface in an image stream captured by a camera of the media device. Examples disclosed herein provide for an enhanced viewing experience by enabling a user to view media on a virtual display surface within a display of a media device. Accordingly, the virtual surface may provide for enhance resolution by providing an optical illusion to appear larger or clearer than a standard display. Examples disclosed herein may be implemented on a standard media device, such as a smartphone, tablet computer, PDA, etc. Examples further involve utilizing control of a camera to enable use of a non-transparent display and device. 
     Although certain example methods, apparatus and articles of manufacture have been disclosed herein, the scope of coverage of this disclosure is not limited thereto. On the contrary, this disclosure covers all methods, apparatus and articles of manufacture fairly falling within the scope of the claims of this disclosure.