Method and apparatus for controlling distortion of a projected image
First Claim
1. A method of displaying an image of a subject on a display surface having a display surface shape and a display surface position, for observation from a viewpoint having a viewpoint position at which said display surface subtends a first field of view, said displayed image having a controlled amount of distortion, said method comprising the steps of:
- recording source image visual data for said image by transforming source visual data of said subject through a first distorting transformation process with respect to a recording point at which said subject subtends a second field of view which is at least partially contained within said first field of view at said recording point;
transforming said recorded source image visual data through an intermediate transformation process to produce target image visual data; and
playing back said target image visual data from a playback point having a playback point position at which said display surface subtends a third field of view and such that said subject image subtends at said viewpoint a fourth field of view at least partially contained within said first field of view of said viewpoint, through a second distorting transformation process;
wherein;
said first and second distorting transformation processes, and said intermediate transformation process are selected so that said second and fourth fields of view are substantially identical, thereby causing said controlled amount of distortion.
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Accused Products
Abstract
A method and apparatus for displaying an image that is subject to multiple distortions substantially without distortion is provided. The image is recorded from a first viewpoint and subject to a first distortion and played back from a second viewpoint and subject to a second distortion. The display surface may also be distorted (e.g., curved). By mapping back through the projector to the screen and through the camera (at the viewpoint), the image is transformed so that it can be viewed from the viewpoint with little or no distortion.
108 Citations
152 Claims
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1. A method of displaying an image of a subject on a display surface having a display surface shape and a display surface position, for observation from a viewpoint having a viewpoint position at which said display surface subtends a first field of view, said displayed image having a controlled amount of distortion, said method comprising the steps of:
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recording source image visual data for said image by transforming source visual data of said subject through a first distorting transformation process with respect to a recording point at which said subject subtends a second field of view which is at least partially contained within said first field of view at said recording point; transforming said recorded source image visual data through an intermediate transformation process to produce target image visual data; and playing back said target image visual data from a playback point having a playback point position at which said display surface subtends a third field of view and such that said subject image subtends at said viewpoint a fourth field of view at least partially contained within said first field of view of said viewpoint, through a second distorting transformation process;
wherein;said first and second distorting transformation processes, and said intermediate transformation process are selected so that said second and fourth fields of view are substantially identical, thereby causing said controlled amount of distortion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. Apparatus for displaying an image of a subject on a display surface having a display surface shape and a display surface position, for observation from a viewpoint having a viewpoint position at which said display surface subtends a first field of view, said displayed image having a controlled amount of distortion, said apparatus comprising:
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means for recording source image visual data for said image including means for transforming source visual data of said subject through a first distorting transformation process with respect to a recording point at which said subject subtends a second field of view which is at least partially contained within said first field of view at said recording point; intermediate transforming means for transforming said recorded source image visual data through an intermediate transformation process to produce target image visual data; and means for playing back said target image visual data from a playback point having a playback point position at which said display surface subtends a third field of view and such that said subject image subtends at said viewpoint a fourth field of view at least partially contained within said first field of view at said viewpoint, through a second distorting transformation process;
wherein;said first and second distorting transformation processes, and said intermediate transformation process are selected so that said second and fourth fields of view are substantially identical, thereby causing said controlled amount of distortion. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72)
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73. A method of serially displaying a plurality of images of a subject on a display surface having for each image a respective display surface shape and a respective display surface position, for observation from a corresponding plurality of viewpoints, one for each of said plurality of images, each of said viewpoints having a respective viewpoint position at which said display surface subtends a respective first field of view for its respective image, each of said displayed images having a controlled amount of distortion, said method comprising the steps of:
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serially recording source image visual data for each of said plurality of images with respect to a respective recording point at which said subject subtends at said respective viewpoint a respective second field of view which is at least partially contained within said respective first field of view at said respective recording point; for each of said plurality of images, transforming said respective recorded image visual data through a respective intermediate transformation process to produce respective target image visual data; and serially playing back and respective target image visual data from respective playback points each having a respective playback point position at which said display surface subtends a respective third field of view and such that said subject image subtends at said respective viewpoint a respective fourth field of view at least partially contained within said respective first field of view at said respective viewpoint, through a respective playback distorting transformation process;
wherein;for each of said plurality of images, said respective intermediate transformation process, said respective playback distorting transformation process, and said respective first, second, third and fourth fields of view combine to contribute to said controlled amount of distortion. - View Dependent Claims (74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112)
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113. Apparatus for serially displaying a plurality of images of a subject on a display surface having for each image a respective display surface shape and a respective display surface position, for observation from a corresponding plurality of viewpoints, one for each of said plurality of images, each of said viewpoints having a respective viewpoint position at which said display surface subtends a respective first field of view for its respective image, each of said displayed images having a controlled amount of distortion, said apparatus comprising:
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means for serially recording source image visual data for each of said plurality of images with respect to a respective recording point at which said subject subtends a respective second field of view which is at least partially contained within said respective first field of view at said respective recording point; intermediate transforming means for transforming said respective recorded image visual data for each of said plurality of images through a respective intermediate transformation process to produce respective target image visual data; and means for serially playing back said respective target image visual data from respective playback points each having respective playback point position at which said display surface subtends a respective third field of view and such that said subject image subtends at said respective viewpoint a respective fourth field of view at least partially contained within said respective first field of view at said respective viewpoint, through a respective playback distorting transformation process;
wherein;for each of said plurality of images, said respective intermediate transformation process, said respective playback distorting transformation process, and said respective first, second, third and fourth fields of view combine to contribute to said controlled amount of distortion. - View Dependent Claims (114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152)
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Specification