Along with the rapid development of digital technology and internet,image data safety protection is getting more and mote serious and digital watermarking technology has become an effective way to protect the safety of the data. It proposes a blind semi-fragile watermarking algorithm based on Hamming code, which is used in image copyright protection. First of all,it transforms binary watermark signal to Hamming code and modulates it,then embeds the mcdulatec watermarking into the original image. This process uses adaptive partition algorithm. At last,it adopts the correcting algorithm of Hamming code to extract the watermark, which soives the contradiction between watermark invisibility and robustness felicitously. Experimental results show that this algorithm has a bit of toleration to attacks, such as JPEG lossy compression and Gaussian low-pass filter.%随着数字技术和互联网的飞速发展,图像数据的安全保护问题日益严重,而数字水印技术已成为一种保护数据安全的有效途径.文中提出了一种基于汉明码的用于图像版权保护的半脆弱水印盲算法.首先对二值水印信号进行汉明编码并调制,然后将调制后的水印号采用自适应分块算法嵌入到原始图像中,最后利用了汉明码的纠错算法进行了水印的提取.算法较好地解决了水印的不可见性和鲁棒性之间的矛盾.实验结果表明,该算法对JPEG有损压缩和高斯低通滤波等攻击具有一定的容忍性.
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