HVS Based Adaptive Digital Image Watermarking

It is known that there is a trade off between the imperceptibility and robustness of a watermark. Trying to deal with this problem, a new adaptive digital image watermarking method is proposed. The new spatial masking is built according to the image features such as the brightness, edges, and region...

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Bibliographic Details
Main Authors: Huiyan Qi, Jiying Zhao
Format: Conference Proceeding
Language:English
Subjects:
DCT domain masking
Digital images
Discrete cosine transforms
Equations
Humans
HVS masking
Information technology
Multimedia communication
PSNR
Robustness
Visual system
Watermarking
watermarking energy
wPSNR
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Summary:It is known that there is a trade off between the imperceptibility and robustness of a watermark. Trying to deal with this problem, a new adaptive digital image watermarking method is proposed. The new spatial masking is built according to the image features such as the brightness, edges, and region activities. With the same watermarking energy, the quality of watermarked image using adaptive masking is much better than the one without using adaptive masking. We analyze that the PSNR cannot distinguish the qualities of two images with the same watermarking energy. We propose to use the wPSNR to evaluate the image quality. The watermark is detected by the key-dependent method without knowing any information of the original image. In addition, we also extend this proposed spatial masking to the DCT domain by searching the extreme value of the quadratic function subject to the bounds on the variables
ISSN:0840-7789
2576-7046
DOI:10.1109/CCECE.2006.277349