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US 6,204,854 B1Granted
Method and system for encoding rotations and normals in 3D generated scenes
AssigneeFrance Telecom
InventorsJulien Signes, Olivier Ondet
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Abstract
A method and system for encoding a video stream using a compact representation for rotations and normals. The method and system convert rotations and normals into normalized rotations and normals and then project the normalized versions onto a unit cube. Each rotation and normal is encoded according to on which face it was projected. In addition, motion can be compactly represented by movement across the unit cube.
Claims6
A computer-implemented method of encoding a video stream, the method comprising the steps of:
- (a) calculating an original vector representing one of a normal and a rotation;
- (b) calculating a normalized vector from the original vector;
- (c) projecting the normalized vector onto a unit cube to produce a first point on a first face of the unit cube;
- and
- (d) encoding a video stream using an index of the first face and a location of the first point on the first face.
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