Apparatus for displaying a 3D image and controlling method thereof based on display size

A method of controlling an image display device, the method comprising:

• obtaining a first image of an object from a first viewpoint by using a first camera device;
• obtaining a second image of the object from a second viewpoint by using a second camera device, wherein the second camera device includes a multi-step retractable pipe member and a camera attached to the multi-step retractable pipe member, wherein the second viewpoint is based on the pipe member being at a first position;
• obtaining a third image of the object from a third viewpoint by using the second camera device, wherein the third viewpoint is based on the pipe member being at a second position that is extended from the first position;
• displaying a perceived three-dimensional (3D) image on a display unit by using the obtained first, second and third images;
• connecting, via an interface unit, to an external display device for displaying the perceived 3D image;
• and
• controlling the interface unit to display the perceived 3D image via the external display device by using a combination of two images from among the obtained first, second and third images, wherein the combination of two images is based on a size of the external display device.

A method of controlling a three-dimensional (3D) image, the method comprising:

• obtaining a first image of an object from a first viewpoint by using a first camera device;
• obtaining a second image of the object from a second viewpoint by using a second camera device, wherein the second camera device includes a multi-step retractable pipe member and a camera attached to the multi-step retractable pipe member, wherein the second viewpoint is based on the camera being at a first position;
• obtaining a third image of the object from a third viewpoint by using the second camera device, wherein the third viewpoint is based on the camera being at a second position that is extended from the first position;
• displaying, on a display screen, a perceived 3D image by using a first combination of two images from among the obtained first, second and third images;
• receiving, via a user input unit, a user input for changing a combination of images;
• and
• when the user input is received, displaying, on the display screen, the perceived 3D image by using a second combination of two images from among the obtained first, second and third images.