SVD Based Semi-fragile Watermarking Method
Rui Sun · Journal of Circuits and Systems · 2002
With the application of digital images in deferent area., it is becoming easier to modify or forge image information using widely available editing software. Digital watermarking techniques have been recognized as an effective solution to image authentication. A semi-fragile watermarking technique based on block singular value decomposition(SVD)is proposed. Binary watermark image of pseudo-random permutation is embedded into the biggest singular value by quantization process. watermarks can be extracted without the original pattern. Experimental results show that the proposed scheme can be used to prevent malicious attacks but permit JPEG format compression and to locate alteration made on the image.