提出一种新颖的、鲁棒的隐写系统,采用遗传算法将水印信息嵌入到图像的DCT变换域中,实现水印信息的最优化嵌入。该算法提取出的水印无失真,可以改善水印系统不可感知性和不可统计性。实验结果表明,该方法抵抗噪声较强,但其平滑攻击、锐化攻击的能力较差。 A novel and robust steganography system is proposed. The watermark information is embedded into the DCT domain of the image by genetic algorithm to realize the optimal embedding of watermarking information. The algorithm extracts the watermark without distortion, can improve imperceptibility and non-statistic of watermarking system. The experimental results show that this method is robust against noise but less capable of smooth attack and sharpening attack.