关键词: 数字水印, 结构化编码, 剪切攻击, 图像定位, structured coding, cropping attack, image orientation

Abstract: A digital watermarking algorithm based on the accessorial information was proposed to resist cropping attack. The algorithm coded watermark with structured coding, and made the digital watermarking possess the identifying function. The embedding and extracting strategies were designed too. Experimental results show that the algorithm has good extracting effect and the fast speed, and can resist cropping attack and some routine attacks effectively.

Key words: digital watermark