Method and device for coding a sequence of images

摘要

A method of coding a sequence of images comprises at least one image comprising an image region of interest.;The coding method comprises the following steps implemented for said at least one image of said sequence of images:
determining (S10 to S23) an image portion comprising the image region of interest on the basis of a rate-distortion criterion representing a compromise between the compression efficiency the distortion of the image portion and the compression efficiency the distortion of the whole of said at least one image; andcoding (S24) said at least one image on the basis of the determined image portion.

主权项

1. A method of coding a sequence of images comprising at least one image (Img) comprising an image region of interest, the method being characterized in that it comprises the following steps implemented for the at least one image (Img) of the sequence of images:
determining an image portion comprising the image region of interest on the basis of a rate-distortion criterion representing a compromise between the compression efficiency and distortion of the image portion and the compression efficiency and distortion of the whole of the at least one image (Img); and coding the at least one image (Img) on the basis of the determined image portion, wherein the at least one image (Img) is divided into image blocks and the determining step comprises, for each image block of a sub-group of image blocks of the divided image blocks, determining a set of image blocks belonging to the image portion on the basis of the rate-distortion criterion, wherein the sub-group of image blocks is a group of image blocks within the at least one image that is divided into image blocks.