【摘要】 本文提出一种基于纠错编码的图像数字水印算法。针对灰度图像水印的特点 ,文中首先介绍了其灰度值的BCH编码方式和水印信号的生成方法 ,然后在小波变换域内 ,利用多因子量化法实现了水印信号的嵌入、水印信号的提取和图像水印的恢复 ,最后对该方法进行了试验 ,试验结果表明 ,该方法在水印的鲁棒性和不可见性之间实现了很好的折衷 ,具有创新 ,可靠性和实用性都很强更多还原

【Abstract】 An image digital watermarking method based on error correcting coding is presented in this paper. On the basis of the features of gray image watermarking, the BCH code of the image’s gray value and the producing method of the watermarking signals are introduced at first, then it is introduced that the embedment and extraction of the watermarking signals and the rebuild of the image watermarking are realized using the multi-factor quantizing algorithm within the wavelet transform domain. At last, this method is verified by some tests, which prove that the method makes compromise between the robustness and the invisible of watermarking. This method is novel and its credibility and practicality are very well.更多还原