CPC H04N 19/521 (2014.11) [H04N 19/577 (2014.11)] | 20 Claims |
1. A method for video processing, comprising:
determining, for a conversion between a current video block of a video and a bitstream of the current video block, an optical flow associated with the current video block in an optical flow-based motion refinement process or prediction process, wherein the optical flow is derived along directions that are different from a horizontal direction and a vertical direction; and
performing the conversion based on the optical flow.
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