PERCEPTUAL MASKS IN THE WAVELET DOMAIN FOR COLOR IMAGE WATERMARKING (ThuAmPO3)
Author(s) :
Elisa Sayrol (Technical University of Catalonia, Spain)
Elena Martínez (Technical University of Catalonia, Spain)
Abstract : In this paper, three different perceptual masks in the wavelet domain are investigated for image watermarking systems. Along with an already existing method, we pre-sent two alternative perceptual masks based on visual detection thresholds in Y, Cb and Cr color channels and on the JPEG2000 significance coding step. A procedure to compare the perceptual masks consists on evaluating on one side, the PSNR and the S-CIELAB visual quality measure and on the other side, the detection performance by a blind watermarking scheme. Experimental results proof the better performance of the two alternative masks as well as the insights that can be derived from the com-parison approach.

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