CPC H04N 19/85 (2014.11) [H04N 19/176 (2014.11); H04N 19/527 (2014.11); H04N 19/61 (2014.11)] | 8 Claims |
1. A method of encoding an omnidirectional image in a stream according to a reference direction of an omnidirectional acquisition system in a 3D scene, the method comprising:
obtaining a first omnidirectional image by mapping the 3D scene onto an omnidirectional image plane according to a 3D to 2D mapping operator and a front direction of the omnidirectional acquisition system;
determining rotation parameters according to the 3D to 2D mapping operator and an angle between the front direction and the reference direction of the omnidirectional acquisition system;
applying a global rotation motion compensation according to the rotation parameters to a third omnidirectional image to obtain a second omnidirectional image, wherein the third omnidirectional image is one of (i) the first omnidirectional image and (ii) a reconstructed omnidirectional image obtained by summing a residual image responsive to the first omnidirectional image and a motion predicted image responsive to the first omnidirectional image;
generating the omnidirectional image by inputting the second omnidirectional image into a motion compensation module that uses residual data and motion vectors; and
encoding the omnidirectional image and the rotation parameters in the stream.
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