Three-dimensional television calibration

1. A method comprising:

displaying a three dimensional test pattern on a display device associated with a client device, said test pattern comprising a stereoscopic image having first and second images and depth characteristics associated with an offset between said first and second images, wherein said stereoscopic image represents an object;

adjusting said offset between said first and second images in response to inputs received from a user of said client device viewing said stereoscopic image from a viewing position relative to a screen of said display device, wherein said adjusting includes:

adjusting a first offset between said first and second images in response to inputs received from said user viewing said stereoscopic image and positioning said object at a first perceived distance from said screen of said display device, and

adjusting a second offset between said first and second images in response to inputs received from said user viewing said stereoscopic image and positioning said object at a second perceived distance from said screen of said display device;

calculating an adjusted offset, customized at least for when the user is positioned at said viewing position, by averaging at least said first and second adjusted offsets; and

storing said adjusted offset in a storage device, enabling said adjusted offset to be applied to stereoscopic images of a three dimensional image stream, at a time of display to the user.

2. The method of claim 1 , wherein said first perceived distance is a distance for which said object is perceived by said user in front of said screen of said display device, and said second perceived distance is a distance for which said object is perceived by said user behind said screen of said display device.

3. The method of claim 1 , wherein said first perceived distance is a maximum distance for which said object is perceived by said user in front of said screen of said display device without stereoscopic distortions, and said second perceived distance is a maximum distance for which said object is perceived by said user behind said screen of said display device without stereoscopic distortions; or vice versa.

4. The method of claim 1 , further comprising:

displaying a further test pattern comprising a further stereoscopic image having further first and second images and depth characteristics associated with a further offset between said further first and second images, said further stereoscopic image representing a plurality of further objects;

adjusting a third offset between said further first and second images in response to inputs received from a user viewing said further stereoscopic image at a first angular viewing position relative to said screen of said display device and aligning a first further object perceived at a first depth with a second further object perceived at a second depth; and

adjusting a fourth offset between said further first and second images in response to inputs received from a user viewing said further stereoscopic image at a second angular viewing position relative to said screen of said display device and aligning said first further object perceived at said first depth with a third further object perceived at said second depth, wherein said calculating includes:

calculating the adjusted offset, customized for when the user is positioned at any of a plurality of viewing positions, by averaging at least said first, second, third and fourth offsets.

5. The method of claim 4 , wherein said first angular viewing position is a maximum angular viewing position on the left of said screen of said display device from which said object is perceived by said user without stereoscopic distortions, and said second angular viewing position is a maximum angular viewing position on the right of said screen of said display device from which said object is perceived by said user without stereoscopic distortions.

6. A system comprising:

a display device associated to a client device, said display device being operable to display a test pattern comprising a stereoscopic image having first and second images and depth characteristics associated with an offset between said first and second images, wherein said stereoscopic image represents an object;

a client device operable to adjust said offset between said first and second images in response to inputs received from a user of the client device viewing said stereoscopic image from a viewing position relative to a screen of said display device, wherein said operable to adjust includes:

operable to adjust a first offset between said first and second images in response to inputs received from said user viewing said stereoscopic image and positioning said object at a first perceived distance from said screen of said display device, and

operable to adjust a second offset between said first and second images in response to inputs received from said user viewing said stereoscopic image and positioning said object at a second perceived distance from said screen of said display device,

the client device further operable to calculate an adjusted offset, customized at least for when the user is positioned at said viewing position, by averaging at least said first and second adjusted offsets; and

a storage device operable to store said adjusted offset, wherein said client device is further operable to apply said adjusted offset to stereoscopic images of a three dimensional image stream, at a time of display to the user by the display device.

7. One or more non-transitory computer readable tangible storage media encoded with software comprising computer executable instructions and when the software is executed operable to:

display a test pattern comprising a stereoscopic image having first and second images and depth characteristics associated with an offset between said first and second images, wherein said stereoscopic image represents an object;

adjust said offset between said first and second images in response to inputs received from a user viewing said stereoscopic image from a viewing position relative to a screen, wherein said adjust includes:

adjust a first offset between said first and second images in response to inputs received from said user viewing said stereoscopic image and positioning said object at a first perceived distance from said screen, and

adjust a second offset between said first and second images in response to inputs received from said user viewing said stereoscopic image and positioning said object at a second perceived distance from said screen,

calculate an adjusted offset, customized at least for when the user is positioned at said viewing position, by averaging at least said first and second adjusted offsets; and

store said adjusted offset, so that said adjusted offset can be applied to stereoscopic images of a three dimensional image stream, at a time of display to the user.