A new approach for optimization in image watermarking by using genetic algorithms

Authors:
P. Kumsawat;K. Attakitmongcol;A. Srikaew
Affiliations:
Signal & Image Process. Res. Group, Suranaree Univ. of Technol., Nakhon Ratchasima, Thailand;-;-
Venue:
IEEE Transactions on Signal Processing
Year:
2005

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Abstract

In this paper, the authors propose the spread spectrum image watermarking algorithm using the discrete multiwavelet transform. Performance improvement with respect to existing algorithms is obtained by genetic algorithms optimization. In the proposed optimization process, the authors search for parameters that consist of threshold values and the embedding strength to improve the visual quality of watermarked images and the robustness of the watermark. These parameters are varied to find the most suitable for images with different characteristics. The experimental results show that the proposed algorithm yields a watermark that is invisible to human eyes and robust to various image manipulations. The authors also compare their experimental results with the results of previous work using various test images.