Image processing device and image processing method, display device and display method, computer program, and image display system

1. An image processing device, comprising:

an orientation information acquisition unit configured to acquire orientation information of a head portion of a user that observes a display image of a display device;

an angle of view switching unit configured to switch an angle of view at which the display image is to be cut from an original image at a predetermined angle of view at center position of the display image;

a rendering process unit configured to generate the display image based on the orientation information and the angle of view; and

a transmission unit configured to transmit the generated display image to the display device.

2. The image processing device according to claim 1 , wherein the display device is configured to be fixed to the head portion or a face portion of the user.

3. The image processing device according to claim 1 , wherein the orientation information acquisition unit is configured to receive the orientation information from an orientation detection device which is configured to detect an orientation of the head portion of the user.

4. The image processing device according to claim 1 , wherein the rendering process unit is configured to cut out a region corresponding to the angle of view from a position corresponding to the orientation information of the original image to generate the display image.

5. The image processing device according to claim 1 , further comprising:

a user operation unit configured to be operable by the user, wherein the angle of view switching unit is configured to switch the angle of view based on an operation by the user in relation to the user operation unit.

6. The image processing device according to claim 5 , wherein the user operation unit includes a touch panel, and

wherein the angle of view switching unit is configured to switch the angle of view based on a touch operation by the user in relation to the touch panel.

7. The image processing device according to claim 6 , wherein the angle of view switching unit is configured to switch alternately to one of a first angle of view and a second angle of view every time the user touches the touch panel.

8. The image processing device according to claim 7 , wherein the angle of view switching unit is configured to set the first angle of view and the second angle of view to fixed values.

9. The image processing device according to claim 7 , wherein the angle of view switching unit is configured to determine the first angle of view based on a resolution of the display device, and determine the second angle of view based on the resolution of the display device and a resolution of the original image to be processed by the rendering process unit.

10. The image processing device according to claim 1 , wherein the angle of view switching unit is configured to determine the angle of view based on feature values of the original image.

11. The image processing device according to claim 10 , wherein the angle of view switching unit is configured to determine smallest angle of view at which a total number of objects exceeds a predetermined value.

12. The image processing device according to claim 10 , wherein the angle of view switching unit is configured to determine smallest angle of view at which a weighted sum value of objects exceeds a predetermined value.

13. An image processing method, comprising:

acquiring orientation information of a head portion of a user that observes a display image of a display device;

switching an angle of view at which the display image is to be cut from an original image at a predetermined angle of view at center position of the display image;

generating the display image based on the orientation information and the angle of view; and

transmitting the generated display image to the display device.

14. A display device, comprising:

a display unit;

an orientation information acquisition unit configured to acquire orientation information of a head portion of a user that observes a display image of the display unit;

an angle of view switching unit configured to switch an angle of view at which the display image is to be cut from an original image at a predetermined angle of view at center position of the display image; and

a rendering process unit configured to generate the display image based on the orientation information and the angle of view.

15. The display device according to claim 14 , further comprising:

a user operation unit configured to be operable by the user;

wherein the angle of view switching unit is configured to switch the angle of view based on an operation performed by the user in relation to the user operation unit.

16. The display device according to claim 15 , wherein the angle of view switching unit is configured to switch alternately to one of a first angle of view and a second angle of view every time the user operation is performed.

17. A display method, comprising:

acquiring orientation information of a head portion of a user that observes a display image of a display unit;

switching an angle of view at which the display image is to be cut from an original image at a predetermined angle of view at center position of the display image; and

generating the display image based on the orientation information and the angle of view.

18. A non-transitory computer readable medium having stored thereon, a set of computer-executable instructions for causing a computer to execute operations, comprising:

acquiring orientation information of a head portion of a user that observes a display image of a display device;

switching an angle of view at which the display image is to be cut from an original image at a predetermined angle of view at center position of the display image;

generating the display image based on the orientation information and the angle of view; and

transmitting the generated display image to the display device.

19. A non-transitory computer readable medium having stored thereon, a set of computer-executable instructions for causing a computer to execute operations, comprising:

acquiring orientation information of a head portion of a user that observes a display image of a display unit;

switching an angle at which view of the display image is to be cut from an original image at a predetermined angle of view at center position of the display image; and

generating the display image based on the orientation information and the angle of view.

20. An image display system, comprising:

a display device configured to display an image;

a head portion action tracking device configured to measure an orientation of a head portion of a user that observes a display image of the display device; and

a rendering device configured to switch an angle of view at which the display image displayed on the display device is to be cut from an original image at a predetermined angle of view at center position of the display image, and generate the display image based on the orientation information and the angle of view.