Image encoding method and apparatus and image decoding method and apparatus based on motion vector normalization

摘要

Provided are an image encoding method and apparatus, and an image decoding method and apparatus. The image encoding method includes: obtaining a variation of a motion estimation error with respect to a homogeneity degree of a motion vector according to mergence, based on a motion vector of each of merged blocks obtained by merging adjacent blocks, motion vectors of the adjacent blocks included in each of the merged blocks, and motion vectors of neighboring blocks of each of the merged blocks; and determining, based on the obtained variation, a merged block having a smallest variation from among the merged blocks and whether to merge the adjacent blocks included in the determined merged block.

主权项

1. An image encoding method comprising:
obtaining motion vectors of blocks forming an image; obtaining merged blocks by merging adjacent blocks; obtaining a motion vector of each of the merged blocks; obtaining a variation of a motion estimation error with respect to a homogeneity degree of motion vectors according to mergence with respect to each of the merged blocks, based on the motion vector of each of the merged blocks, motion vectors of the adjacent blocks included in each of the merged blocks, motion vectors of neighboring blocks of each of the merged blocks, and motion vectors of neighboring blocks of the adjacent blocks included in each of the merged blocks; and determining a merged block having a smallest variation from among the merged blocks, and determining whether to merge blocks included in the determined merged block, based on the obtained variation.