EARLY TERMINATION OF OPTICAL FLOW REFINEMENT Russian patent published in 2023 - IPC H04N19/51 H04N19/52 

FIELD: image processing.

SUBSTANCE: invention is related to refinement of optical flow. A video encoding method is claimed, implemented in a decoding device or encoding device, wherein the method comprises: obtaining initial motion vectors for the current block; obtaining first predictions for the sample value in the current block based on the original motion vectors; calculating a first matching value according to the first predictions; determining whether the optical flow refinement process should be performed or not according to at least one preset condition, wherein the at least one preset condition comprises a condition of whether the calculated first matching value is equal to or greater than a threshold value; and performing an optical flow refinement process to obtain a final inter-prediction for the sample value in the current block when it is determined that the optical flow refinement process is to be performed.

EFFECT: increase of accuracy of external prediction of the current block of the picture to be encoded.

17 cl, 11 dwg