Method and device of intra-predicting target block of video picture based on template matching, and storage medium

Abstract

A method of intra-predicting a target block of a video picture based on template matching that compares a target template patch with a candidate reference template patch, the method including: determining a candidate reference block neighborhood according to target block neighborhood reconstructed samples availability and according to a geometry transform type; obtaining the candidate reference template patch by applying a geometry transform, identified by the geometry transform type, on the candidate reference block neighborhood; selecting a candidate reference block with a minimum cost obtained by comparing the candidate reference template patch and the target template patch; and generating an intra-prediction block for the target block by applying the geometry transform, identified by the geometry transform type associated with the selected candidate reference block, to the selected candidate reference block.