Abstract:
A mobile terminal includes a communication unit, a display, a camera for obtaining images, and a processor for causing an image to be displayed on the display and for causing images to be communicated via the communication unit. The processor may be further configured to obtain a first image from the camera, obtain a substantial mirror image of the first image to form a second image, display the second image on the display, and communicate the first image to a receiving device via a wireless communication link.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    Pursuant to 35 U.S.C. §119(a), this application claims the benefit of earlier filing date and right of priority to Korean Application No. 10-2007-0039794, filed on Apr. 24, 2007, the contents of which are hereby incorporated by reference herein in their entirety. 
       FIELD OF THE INVENTION 
       [0002]    The present invention generally relates to wireless communications, and in particular, to displaying mirror images on a display of a mobile terminal. 
       DISCUSSION OF THE RELATED ART 
       [0003]    Developments of communication technologies include improvements in the realm of video conferencing. Video conferencing permits two or more parties to communicate with not only audio but with video or images depicting the users or their environment. 
         [0004]    A typical communication includes obtaining an image of a first party which is then communicated to a second party for display. In some cases, an image is obtained from the second party and communicated to the first party to display. To optimize the conference experience, it is desirable to center the subject within the image. Some systems display on the transmitting mobile terminal the image which is being transmitted. Even if this feature is provided, users often find it challenging to center themselves within the image since such action requires the user to move the camera relative to the user in a direction which is opposite to that which is depicted in the display. For instance, if the camera is moved to the user&#39;s left, the result is that the subject moves from the right of the image to the center of the image, and vice versa. Such action requires unnatural movement of the camera relative to the user 
       SUMMARY OF THE INVENTION 
       [0005]    Features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. 
         [0006]    In accordance with an embodiment, a method for displaying an image on a mobile terminal includes obtaining a first image from a first camera configured with a first mobile terminal, obtaining a substantially mirror image of the first image to a form a second image, displaying the second image on a display associated with the first mobile terminal, and communicating the first image via a wireless communication link to a receiving device. 
         [0007]    In one feature, the first camera is user-positionable in a plurality of different positions. 
         [0008]    In another feature, the first camera is fixedly configured with the first mobile terminal. 
         [0009]    In yet another feature, the first camera is located on the mobile terminal in such a manner as to capture images of a user of the first mobile terminal. 
         [0010]    In still yet another feature, the first camera is located on the mobile terminal in such a manner as to capture images of a user of the first mobile terminal while the display is visible to the user. 
         [0011]    In one aspect, the first mobile terminal has a first display mode and a second display mode which is user selectable, such that the first display mode comprises displaying the second image on the display associated with the first mobile terminal, and the second display mode comprises displaying the first image, instead of the second image, on the display associated with the first mobile terminal. 
         [0012]    In another aspect, the method further includes displaying a display mode menu item on the display of the first mobile terminal, and changing an image display mode of the first mobile terminal between the first display mode and the second display mode responsive to user input with regard to the display mode menu item. 
         [0013]    In yet another aspect, the method further includes displaying an icon on the display of the first mobile terminal, and changing an image display mode of the first mobile terminal between the first display mode and the second display mode responsive to user input with regard to the icon. 
         [0014]    In still yet another aspect, the method further includes changing an image display mode of the first mobile terminal between the first display mode and the second display mode responsive to user interaction with a key of the first mobile terminal or user contact with the display of the first mobile terminal. 
         [0015]    In one feature, the method further includes obtaining a third image from a second camera configured with the first mobile terminal, displaying the third image on the display associated with the first mobile terminal, and communicating the third image via a wireless communication link to the receiving device. 
         [0016]    In another feature, the second image and the third image are simultaneously displayed on the display. 
         [0017]    In yet another feature, the method further includes obtaining a third image from a second camera configured with the first mobile terminal, displaying the third image as a background image on the display associated with the first mobile terminal, displaying the second image as a foreground image on the display associated with the first mobile terminal, and communicating a combined image including the third image and the first image via a wireless communication link to the receiving device. 
         [0018]    In still yet another feature, the method further includes providing relative positioning between the second image and the third image responsive to user input. 
         [0019]    In one aspect, the method further includes obtaining a third image from a second camera configured with the first mobile terminal, displaying the third image as a background image on the display associated with the first mobile terminal, displaying the second image as a partially transparent foreground image on the display associated with the first mobile terminal, and communicating a combined image including the third image and the first image via a wireless communication link to the receiving device. 
         [0020]    In another aspect, the method further includes obtaining a third image from a second camera configured with the first mobile terminal, displaying the third image as a partially transparent background image on the display associated with the first mobile terminal, displaying the second image as a foreground image on the display associated with the first mobile terminal, and communicating a combined image including the third image and the first image via a wireless communication link to the receiving device. 
         [0021]    In yet another aspect, the method further includes obtaining a third image from a second camera configured with the first mobile terminal, displaying the third image as a partially transparent background image on the display associated with the first mobile terminal, displaying the second image as a partially transparent foreground image on the display associated with the first mobile terminal, and communicating a combined image including the third image and the first image via a wireless communication link to the receiving device. 
         [0022]    In still yet another aspect, the method further includes receiving a fourth image communicated by a remote device, and displaying the fourth image simultaneously as the second image on the display associated with the first mobile terminal. 
         [0023]    In another feature, the mirror image of the first image represents a right-left reverse of the first image. 
         [0024]    In accordance with an alternative embodiment, a mobile terminal includes a communication unit, a display, a first camera for obtaining images, and a processor for causing an image to be displayed on the display and for causing images to be communicated via the communication unit. The processor may be configured to obtain a first image from the first camera, obtain a substantial mirror image of the first image to form a second image, display the second image on the display, and communicate the first image to a receiving device via a wireless communication link. 
         [0025]    In accordance with yet another alternative embodiment, a mobile terminal includes a communication unit, a display including a first display mode and a second display mode which is user selectable, a first camera for obtaining images and which is located on the mobile terminal in such a manner as to capture images of a user of the mobile terminal while the display is visible to the user, and a processor for causing an image to be displayed on the display and for causing images to be communicated via the communication unit. The processor is configured to obtain a first image from the first camera, obtain a substantial mirror image of the first image to form a second image, display the second image on the display, communicate the first image to a receiving device via a wireless communication link, change display mode of the display responsive to user input, such that the first display mode comprises displaying the second image on the display associated with the mobile terminal, and such that the second display mode comprises displaying the first image, instead of the second image, on the display. 
         [0026]    These and other embodiments will also become readily apparent to those skilled in the art from the following detailed description of the embodiments having reference to the attached figures, the invention not being limited to any particular embodiment disclosed. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0027]    The above and other aspects, features, and advantages of the present invention will become more apparent upon consideration of the following description of preferred embodiments, taken in conjunction with the accompanying drawing figures, wherein: 
           [0028]      FIGS. 1A and 1B  respectively depict front and rear sides of a mobile terminal according to an embodiment of the present invention. 
           [0029]      FIG. 2  is a block diagram depicting the mobile terminal of  FIGS. 1A and 1B . 
           [0030]      FIG. 3  is a flowchart depicting a method for displaying images obtained from a single camera according to an embodiment of the present invention. 
           [0031]      FIG. 4  provides an example in which an image having an original orientation is transmitted to a remote user while a mirror image of the original image is displayed on the mobile terminal of the user. 
           [0032]      FIGS. 5A and 5B  provide examples of obtained images to demonstrate directions for which the mobile terminal is to be positioned relative to a user or other object. 
           [0033]      FIG. 6  depicts a display of a typical mobile terminal in accordance with an embodiment of the present invention. 
           [0034]      FIG. 7  is a flowchart depicting a method for displaying images according to an embodiment of the present invention. 
           [0035]      FIG. 8  provides an example in which an image having an original orientation is transmitted to a remote user while the same original image is displayed on the mobile terminal of the user. 
           [0036]      FIGS. 9A and 9B  provide examples of images which may be obtained from a second camera configured to face the same direction as the user of the mobile terminal. 
           [0037]      FIG. 10  depicts a display of a mobile terminal according to an embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0038]    In the following detailed description, reference is made to the accompanying drawing figures which form a part hereof, and which show by way of illustration specific embodiments of the invention. It is to be understood by those of ordinary skill in this technological field that other embodiments may be utilized, and structural, electrical, as well as procedural changes may be made without departing from the scope of the present invention. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or similar parts. 
         [0039]    Various embodiments will be described in conjunction with a mobile terminal capable of performing video communication. However, such teachings apply also to other types of electronic devices. Examples of such devices include laptop computers, desktop computers, portable devices, digital broadcast receiving terminals, MP3 players, personal digital assistants (PDAs), portable multimedia players (PMPs), and the like. 
         [0040]      FIGS. 1A and 1B  respectively depict front and rear sides of a mobile terminal according to an embodiment of the present invention.  FIG. 2  is a block diagram depicting the mobile terminal of  FIGS. 1A and 1B . 
         [0041]    Communication unit  100  facilitates video communication with other users via a mobile communication network. In particular, while a terminal user performs voice communication with another party, the communication unit further or alternatively permits images and/or video obtained by first and second cameras  300 ,  400 , to be transmitted to other parties. In some cases, the communication unit receives images, video, and other data. Certain embodiments will be described herein with regard to either video or images. However, it is understood that such embodiments are not so limited and may implement capturing and/or transmitting media types such as images, video, combinations thereof, and the like. 
         [0042]    Memory unit  200  may be used to store various types of data and software for implementing various functions provided by mobile terminal  1 . First camera  300  typically includes a lens, and as shown in  FIG. 1 , may be configured to face the same or similar direction of display  500 . In this arrangement, the user may engage in video communication by viewing display  500  while images of the user are captured by first camera  300 . 
         [0043]    First camera  300  may be fixed or adjustable such that either the camera and/or the camera lens may be adjusted or directed to face one or more directions. 
         [0044]    Second camera  400  is typically configured to face a direction which is different from the direction that first camera  300  faces. In an embodiment, such as that which is shown in  FIG. 1B , second camera  400  is located on the rear side of mobile terminal  1 . Thus, the second camera faces a direction which is opposite to the direction faced by first camera  300 , which is located on the front side of the mobile terminal. 
         [0045]    This arrangement permits the user to perform a video communication using first camera  300  which obtains images of the user, while second camera  400  obtains images of another location (e.g., scenery which the user is facing during the video communication). If desired, images from both the first and second cameras may be transmitted to the other party with which the user is engaged in the video communication. In an embodiment, images obtained from either the first camera or the second camera are transmitted to other parties. 
         [0046]    Display  500  is typically configured to display pictures, video, and other types of information relating to a video conference and other operational aspects of mobile terminal  1 . In an embodiment, the display is implemented as a touchscreen which may further permit user input responsive to contact with the touchscreen. 
         [0047]    Input unit  600  includes devices which permit user input. By way of nonlimiting example only, the input unit may be configured to include a various input keys, control keys, navigational keys, and the like. Note that some or all of the functionality of the input unit may be implemented in conjunction with a touchscreen display. In this embodiment, some or all of the keys depicted in  FIG. 1A  may be omitted. 
         [0048]    Control unit  700  is typically implemented to control various components associated with mobile terminal  1 , such as those which are depicted in  FIG. 2 . 
       Single Camera 
       [0049]      FIG. 3  is a flowchart depicting a method for displaying images obtained from a single camera according to an embodiment of the present invention. In this embodiment, first camera  300  is implemented to obtain the desired images, and thus, second camera  400  is not required. 
         [0050]    Block S 31  includes obtaining a first image via first camera  300 . Block S 32  includes transmitting the first image to another party using, for example, the original orientation of the image. That is, the image that is transmitted during this operation does not undergo a right-to-left image reversal, which refers to a mirror image of the orientation of an original image. Block S 33  includes displaying a mirror image of the first image. 
         [0051]    Implementing the mirror image may be accomplished automatically or responsive to user request. For example, the user may select this function by selecting a certain icon that is displayed on display unit  500  (e.g., using input unit  600  or display unit  500  in the case of a touchscreen). Another alternative is to implement this function responsive to a certain function. An example of the forgoing method will be described with regard to  FIG. 4 . 
         [0052]      FIG. 4  provides an example in which an image having an original orientation is transmitted to a remote user while a mirror image of the original image is displayed on the mobile terminal of the user. In particular, the transmitted image is first image  530 A, while image  530 B is displayed on display  500 . Notably, image  530 B is a mirror image of first image  530 A, which has been obtained by first camera  300 . This mirror image is not transmitted to the remote user. 
         [0053]      FIGS. 5A and 5B  provide examples of obtained images to demonstrate directions for which the mobile terminal is to be positioned relative to a user or other object. In  FIG. 5A , the user is located on the left-most side of the image  530 A- 1 . In mirror image, a user is located on the right side of the image, such as that depicted in image  530 B- 1 . 
         [0054]    If the first image  530 A- 1  is not centered in the image, a natural tendency of the user to center the object of the image is to move the terminal to the left (based upon the perspective of the user facing the terminal having the camera). This is similar to movements performed while looking into a mirror. However, such actions will not center the image on the display. To do so, the user will move the terminal to the right to effect centering of the user within the image, such as that which is shown in image  530 A- 2 . Note that various embodiments will be described with regard to moving the terminal or camera relative to the user as a matter of convenience only. However, it is understood that the desired movement may be achieved by effecting relative movement (i.e., moving the terminal, the object being captured, or both) between the terminal and the object being captured. 
         [0055]    In accordance with an embodiment, mirror image  530 B- 1  is presented to a user such that the object of the image (e.g., a user) is located on the right side of the image. When presented with such an image, a user would naturally move the terminal to the right (based upon the perspective of the user facing the terminal having the camera). Consequently, the object of the image is centered within the image, such as that which is depicted in image  530 B- 2 . A notable distinction between techniques used to achieve the centered images of  FIG. 5A  is that image  530 A- 2  requires movement by a user which is unnatural, whereas image  530 B- 2  permits natural movement. 
         [0056]      FIG. 5B  illustrates the situation in which the user is located on the right-most side of originally orientated image  530 A- 1 . In mirror image, a user is shown located on the left-most side of the image, such as that depicted in image  530 B- 1 . Repositioning the object of each of the images may be obtained in a manner similar to that which is described above in conjunction with  FIG. 5A . In particular, centering of the object of image  530 A- 2  is achieved by moving the terminal to the left (based upon the perspective of the user facing the terminal having the camera). Likewise, with mirror image  530 B- 1 , centering the object of this image is achieved by moving the terminal to the left (based upon the perspective of the user facing the terminal having the camera), such as that which is depicted in image  530 B- 2 . 
         [0057]      FIG. 6  depicts a display of a typical mobile terminal in accordance with an embodiment of the present invention. In this figure, display  500  includes image  550  which has been received from a remote user during, for example, a video conference. Simultaneously, the user of the mobile terminal communicates image  530 A to the remote user. Image  530 A includes an original orientation and is an image of the user of the mobile terminal that is obtained by a camera that is associated with the mobile terminal Display  500  further displays image  530 B, which is a mirror image of the original image  530 A. 
       Multiple Cameras 
       [0058]      FIG. 7  is a flowchart depicting a method for displaying images according to an embodiment of the present invention. This embodiment includes obtaining images from first and second cameras  300 ,  400 . 
         [0059]    Operations associated with blocks S 71 , S 72 , S 73 , may be implemented using, for example, techniques disclosed in blocks S 31 , S 32 , S 33  of  FIG. 3 . Block S 74  includes obtaining a second image via second camera  400 . Block S 75  includes transmitting the second image to another party using, for example, the original orientation of the second image. In particular, the transmitted second image does not undergo a right-to-left image reversal. Block S 76  includes displaying the second image. 
         [0060]      FIG. 8  provides an example in which an image having an original orientation is transmitted to a remote user while the same original image is displayed on the mobile terminal of the user. In particular, the transmitted image is first image  570 , which may be obtained via second camera  400 . This same image may also be displayed on the display of the mobile terminal. This example may be implemented in addition to, or as an alternative to, the other embodiments presented herein. 
         [0061]      FIGS. 9A and 9B  provide examples of images which may be obtained from a second camera configured to face the same direction as the user of the mobile terminal In both examples, the depicted images are not mirror images of the images which were originally obtained. In  FIG. 9A , the user scenery is located on the left-most side of image  570 A- 1 . Centering of the scenery within the image may be obtained by moving the terminal having the second camera to the left. An example of this is depicted in image  570 A- 2 . 
         [0062]      FIG. 9B  provides the example in which scenery is located on the right-most side of image  570 A- 1 . Centering of the scenery within this image may be obtained by moving the terminal to the right, thus resulting in image  570 A- 2 . 
         [0063]      FIG. 10  depicts a display of a mobile terminal according to an embodiment of the present invention. The mobile terminal is shown receiving image  550  from a remote user, while transmitting to the remote user first image  530 A and second image  570 A. Image  550  and second image  570 A are depicted on display  500  of the mobile terminal Mirror image  530 B, which is the mirror image of first image  530 A, is also shown on display  500 . 
         [0064]    In this embodiment, the user may position themselves in mirror image  530 B, as well as positioning the scenery in second image  570 A, using natural movements. 
         [0065]    If desired, the first image  530 A and second image  570 A may be overlapped or otherwise combined prior to or after communication to the remote use. This aspect allows the remote user to see the transmitting user in the environment in which they are currently transmitting. A further alternative is to only combine a specific portion of first image  530 A (e.g., user&#39;s head) with second image  570 A. The size and positioning of first image  530 A within second image  570 A may be defined by the user. As a further example, the first and second images may be overlapped or combined in an opaque or semi-transparent fashion. 
         [0066]    Although embodiments of the present invention may be implemented using the exemplary series of operations described herein, additional or fewer operations may be performed. Moreover, it is to be understood that the order of operations shown and described is merely exemplary and that no single order of operation is required. 
         [0067]    The foregoing embodiments and advantages are merely exemplary and are not to be construed as limiting the present invention. The present teaching can be readily applied to other types of apparatuses and processes. The description of the present invention is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art.