【摘要】 介绍了数字水印的分类 ,提出了一种基于模运算的数字水印算法 .该算法具有很好的性能 :水印隐藏的效果好 ,凭借人类的视觉系统无法看出与原图像的差别 ;可以有效地抵抗JPEG等压缩编码的破坏 ;可以依靠部分图像检测水印 ,在图像受到损坏的情况下 ,仍可以检测到水印信息 ;检测水印时受到口令的限制 ,不知道口令的人无法正确恢复水印 ;检测水印时不需要原始图像更多还原

【Abstract】 This paper proposes a new watermark algorithm based on integer modulo.The features of presented method to embed the watermark are:the difference between the watermarked image and the original is perceptually invisible;the watermark is robust against JPEG encode;the watermark can be retrieved from small part of the watermarked image;the embedded watermark can be read only by using a secret key;retrieval of embedded watermark does not need the original image.更多还原