Image processing apparatus and method, and program

1. A method of processing source images having known viewpoints, comprising:

detecting, by a sensor, a position of a viewer;

determining a sight line direction of the viewer based on the detected position;

determining left-eye and right-eye viewpoints of the viewer based on the determined sight line direction, wherein the left-eye and right-eye viewpoints are determined based on tangent points where two tangents parallel to the sight line direction touch a circle with a diameter equal to a distance between eyes of the viewer, and wherein the circle represents a circle virtually drawn along a plane parallel to a plane of a display screen;

selecting data of at least one of the source images, based on the determined left-eye viewpoint, as raw left-eye data;

selecting data of at least one of the source images, based on the determined right-eye viewpoint, as raw right-eye data;

outputting left-eye image data, based on the raw left-eye data; and

outputting right-eye image data, based on the raw right-eye data.

2. The method of claim 1 , wherein the left-eye and right-eye image data are output to the display screen.

3. The method of claim 1 , comprising:

determining the sight line direction of the viewer, along the plane parallel to a plane of the display screen.

4. The method of claim 1 , comprising:

detecting the position of the viewer in the plane parallel to the plane of the display screen.

5. The method of claim 1 , comprising determining the sight line direction based on a center position of the display screen.

6. The method of claim 1 , comprising determining the left-eye and right-eye viewpoints of the viewer based on a disparity representative of the distance between the eyes of the viewer.

7. The method of claim 1 , wherein each of the raw left-eye and raw right-eye data represents four of the source images.

8. The method of claim 7 , wherein the four of the source images have known viewpoints positioned at the corners of a rectangle encompassing one of the determined left-eye viewpoint and right-eye viewpoint present on the circle.

9. The method of claim 8 , comprising interpolating, based on the known viewpoints positioned at the corners of the rectangle, finished image data including at least one of the left-eye or right-eye image data.

10. The method of claim 1 , wherein the raw left-eye data differs from the raw right-eye data.

11. The method of claim 1 , wherein each of the raw left-eye and raw right-eye data represents two of the source images.

12. The method of claim 11 , wherein the two of the source images have known viewpoints positioned along the circle.

13. The method of claim 12 , comprising interpolating, based on the known viewpoints positioned along the circle, finished image data including at least one of the left-eye or right-eye image data.

14. The method of claim 12 , wherein a third source image has a known viewpoint positioned along the circle and directly across the circle from one of the known viewpoints of the two of the source images.

15. The method of claim 14 , comprising extrapolating, based on (i) the one of the known viewpoints of the two of the source images and (ii) the known viewpoint of the third source image, intermediate image data representing an image having an intermediate viewpoint.

16. The method of claim 15 , comprising interpolating, based on (i) another one of the known viewpoints of the two of the source images and (ii) the intermediate viewpoint, finished image data including at least one of the left-eye image data or right-eye image data.

17. The method of claim 1 , comprising:

detecting, by the sensor, whether the position of the viewer has changed.

18. An apparatus for processing source images having known viewpoints, comprising:

a sensor detecting a position of a viewer;

a sightline determining section for determining a sight line direction of the viewer based on the detected position;

a viewpoint determining section for determining left-eye and right-eye viewpoints of the viewer based on the determined sight line direction, wherein the left-eye and right-eye viewpoints are determined based on tangent points where two tangents parallel to the sight line direction touch a circle with diameter equal to a distance between eyes of the viewer, and wherein the circle represents a circle virtually drawn along a plane parallel to a plane of a display screen; and

a disparity image generating section for:

selecting data of at least one of the source images, based on the determined left-eye viewpoint, as raw left-eye data;

selecting data of at least one of the source images, based on the determined right-eye viewpoint, as raw right-eye data;

outputting left-eye image data, based on the raw left-eye data; and

outputting right-eye image data, based on the raw right-eye data.

19. A non-transitory, computer-readable storage medium storing a set of instructions that, when executed by a processor, causes an apparatus to perform a method of processing source images having known viewpoints, the method comprising:

detecting a position of a viewer;

determining a sight line direction of the viewer based on the detected position;

determining left-eye and right-eye viewpoints of the viewer based on the determined sight line direction, wherein the left-eye and right-eye viewpoints are determined based on tangent points where two tangents parallel to the sight line direction touch a circle with diameter equal to a distance between eyes of the viewer, and wherein the circle represents a circle virtually drawn along a plane parallel to a plane of a display screen;

selecting data of at least one of the source images, based on the determined left-eye viewpoint, as raw left-eye data;

selecting data of at least one of the source images, based on the determined right-eye viewpoint, as raw right-eye data;

outputting left-eye image data, based on the raw left-eye data; and

outputting right-eye image data, based on the raw right-eye data.