一种优化的小波域图像水印技术

为了满足数字水印的安全性、隐蔽性、鲁棒性等特性,本文提出了小波域图像水印技术。有意义图像通过二维混沌加密算法生成水印,使其具有更好的安全性。水印嵌入过程中,利用遗传算法,选择和修改小波系数,将水印嵌入到宿主图像。实验结果显示,有较好的隐蔽性和鲁棒性效果。

An Optimal Image Watermarking Technology in DWT Domain

A DWT domain image watermarking scheme is proposed in this paper to meet the watermarking properties： security, imperceptibility and robustness. In the scheme, watermark comes from a meaningful binary image encrypted by two-dimensional chaotic stream encryption that has more security. In the procedure of watermark embedding, the watermark is embedded into host image through selecting and modifying the wavelet coefficients using Genetic algorithm with a simple fitness function to improve the imperceptibility of watermarked image. The results of our scheme realization and robust experiments show that this scheme has preferable performance.