Abstract:

The embedding algorithm,  based on the property of human visual system(HVS) calculating watermarking intensity factor of carrier image blocks, applied transmitting diversity technique embedding encryption watermarking in 3 color channels of carrier image DCT and the extraction algorithm, which extracted 3 watermarking from 3 color channels, made use of image fusion methods achieving the last watermarking to heighten the resisting attack ability of watermarking was proposed. The algorithm, image capacity experiments, JPEG compression, cutting operation, noise and filter attacking experiments were  achieved in the matlab. Experimental results showed  that the algorithm has larger embedding capacity, lower bit error  rate and stronger invisibility and robustness when images are attacked.

Key words:  human visual system, multi-channel, discrete cosine transform, watermarking algorithm