Apparatus and method for adjusting stereoscopic images in response to head roll

1. A stereoscopic display comprising:

a sensor configured to detect head roll of a viewer; and

an image renderer coupled to the sensor and configured to adjust a 3D image according to the detected head roll,

wherein the image renderer is configured to increasingly decrease magnitudes of disparities between a right image and a left image of the 3D image as an angle of the detected head roll increases,

wherein the image renderer is configured to adjust a direction of the disparities according to the angle by keeping the left image static and by relocating the right image with respect to the left image to form a relocated right image, and

wherein the image renderer is configured to calculate coordinates of pixels of the relocated right image based on warning pixels of the right image when a disparity gain factor is greater than a reference gain factor and based on warping pixels of the left image when the disparity gain factor is less than or equal to the reference gain factor.

2. The stereoscopic display of claim 1 , wherein the sensor is configured to measure the angle of the head roll by measuring a degree of rotation of an interocular axis of the viewer.

3. The stereoscopic display of claim 2 , wherein the image renderer is configured to rotate the direction of the disparities between the right image and the left image to correspond to the degree of rotation of the interocular axis of the viewer.

4. The stereoscopic display of claim 1 , wherein the image renderer is configured to calculate coordinates of pixels of the relocated right image based on warping pixels of the right image when the angle of the head roll is less than a reference head roll angle and based on warping pixels of the left image when the angle of the head roll is greater than or equal to the reference head roll angle.

5. The stereoscopic display of claim 1 , wherein the image renderer is configured to adjust the 3D image when the angle of the detected head roll exceeds a threshold head roll angle.

6. A stereoscopic display comprising:

a sensor configured to detect a first head roll of a first viewer, and to detect a second head roll of a second viewer; and

an image renderer coupled to the sensor and configured to adjust a 3D image according to the first head roll, and to adjust the 3D image according to the second head roll,

wherein one of a left image or a right image of the 3D image is configured to be commonly seen by the first viewer and by the second viewer, and the other one of the left image or the right image is configured to be adjusted according to the first head roll to be seen by the first viewer and adjusted according to the second head roll to be seen by the second viewer, and

wherein the image renderer is configured to adjust a direction of disparities between the right image and the left image of the 3D image according to the first head roll, and to adjust the direction of the disparities between the right image and the left image according to the second head roll.

7. The stereoscopic display of claim 6 , wherein the image renderer is configured to adjust the direction of the disparities by keeping the left image static and by relocating the right image with respect to the left image according to the first head roll to form a first relocated right image, and by relocating the right image with respect to the left image according to the second head roll to form a second relocated right image.

8. The stereoscopic display of claim 7 , wherein the left image is configured to be commonly seen by the first viewer and by the second viewer,

wherein the first relocated right image is configured to be seen by the first viewer, and

wherein the second relocated right image is configured to be seen by the second viewer.

9. A method for adjusting a 3D image in response to head roll of a viewer, the method comprising:

detecting the head roll of the viewer; and

adjusting a 3D image according to the detected head roll,

wherein disparities between a right image and a left image of the 3D image is increasingly decreased as an angle of the detected head roll increases,

wherein the image renderer is configured to adjust a direction of the disparities according to the angle by keeping the left image static and by relocating the right image with respect to the left image to form a relocated right image, and

wherein the image renderer is configured to calculate coordinates of pixels of the relocated right image based on warping pixels of the right image when a disparity gain factor is greater than a reference gain factor and based on warning pixels of the left image when the disparity gain factor is less than or equal to the reference gain factor.

10. The method of claim 9 , wherein the angle of the detected head roll corresponds to a degree of rotation of an interocular axis of the viewer.

11. The method of claim 10 , wherein the adjusting further comprises rotating the direction of the disparities between the right image and the left image to correspond to the degree of rotation of the interocular axis of the viewer.

12. The method of claim 9 , wherein the 3D image is adjusted when the angle of the detected head roll exceeds a threshold head roll angle.