Color Image Watermarking Algorithm Robust to Image Uniting

Taking into account lossy compression JPEG2000, a strongly robust watermark algorithm is proposed which can resist JPEG2000 and JPEG lossy compression as well as prevent image uniting and cutting. Test results show the algorithm is robust in the case of color image changed to gray image, JPEG2000 1∶50 lossy compression, arbitrary images uniting, image cutting less than 50% and additive noise attack. The extracting watermark can be identified better.