Insertion of alphanumeric data into digitized images that are to be compressed and then decompressed, so that the data remains largely unaltered by the compression and decompression steps

摘要

Method for insertion of an additional image, usually alphanumeric data, into a digitized image on which compression and decompression is to take place involving loss of image detail. The method used is an image block transformation algorithm that enables the image blocks and the base images to be placed in fixed image positions.