CPC H04N 19/105 (2014.11) [G06T 5/006 (2013.01); G06T 5/50 (2013.01); G06T 7/248 (2017.01); H04N 19/137 (2014.11); H04N 19/139 (2014.11); H04N 19/159 (2014.11); H04N 19/172 (2014.11); H04N 19/176 (2014.11); H04N 19/51 (2014.11); H04N 19/521 (2014.11); G06T 3/0006 (2013.01); H04N 19/174 (2014.11)] | 8 Claims |
1. A method for decoding an image, the method comprising:
receiving a bitstream including a frame header including a plurality of flag syntax elements, each of the plurality of flag syntax elements being associated with a respective one of a plurality of reference pictures, wherein each of the plurality of flag syntax elements indicates whether the frame header includes global geometric modification information syntax elements for an associated reference picture;
if a flag syntax element indicates that the frame header includes global geometric modification syntax elements for a reference picture associated with the flag syntax element, reading, from the frame header, global geometric modification information syntax elements for the reference picture associated with the flag syntax element;
reconstructing geometric modification information for the reference picture associated with the flag syntax element based on the global geometric modification information syntax elements for the reference picture associated with the flag syntax element;
geometrically modifying the reference picture associated with the flag syntax element based on the reconstructed geometric modification information for the reference picture associated with the flag syntax element to generate a prediction block; and
reconstructing a current picture based on a residual block and the prediction block.
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