METHODS AND DEVICES FOR ENCODING AND DECODING DIGITAL IMAGES WHILE TAKING INTO ACCOUNT THE TYPE OF SOURCE BLOCKS, AND CORRESPONDING SIGNAL AND COMPUTER SOFTWARE PRODUCTS

摘要

The invention relates to a method for encoding and decoding digital images that comprises the step of cutting (21) an image into source blocks of image pixels. According to the invention, this method includes the step of modifying (220) the orientation of at least one source block, thus providing a rectified block, that comprises the sub-steps of: determining (22) a set of rectifications to be used based on the type of the source block, applying (23) the rectification(s) of said set, selecting (24) one of the rectifications, called the selected rectification, based on a predetermined performance criterion.