Adaptive watermarking algorithm based on human visual system

A novel adaptive digital image watermarking algorithm based on the discrete cosine transform (DCT) domain is proposed to classify the original image blocks into several classes based on oil several parameters, with the features of the human visual system (HVS) taken into account during embedding, and different watermarking energies embedded into different blocks to make the algorithm adaptive. Experimental results show that the proposed technique is robust to common digital image processing operations and the quality of the watermarked image is guaranteed.