METHOD OF INSERT OR EXTRACT WATERMARK FOR EVIDENCE ORIGINAL DIGITAL PICTURE/VIDEO ON JPEG/MPEG

摘要

Insertion/detection method of one watermark, a kind of its reliability for being used to verify digital image is arranged to avoid one supplemental code of addition, a such as scrambled, to a file, it is not configured to a JPEG (joint photographic Coding Experts group)/MPEG (Motion Picture Experts Group) file for fully blocking attack, such as scrambled decryption. One coefficient, by DCT (Discrete cosine Transform) and an inquiry table, the insertion for a watermark. One flat region and a non-planar area are isolated by a threshold value with an original image. Flat region is sequentially attached to non-planar area. Watermark image data, in the data in a connection buffer and the data in inquiry table, the watermark data of digital image data is inserted into original image with each compared with another and therefore.