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应用Hash函数增强数字图像半易损性水印的易损性
引用本文:张中月,齐开国.应用Hash函数增强数字图像半易损性水印的易损性[J].计算机辅助设计与图形学学报,2004,16(6):845-849.
作者姓名:张中月  齐开国
作者单位:中国科学技术大学物理系,合肥,230026
摘    要:提出了一种空间域、小波域相结合的数字图像半易损性水印算法,该算法在图像的小波变换域嵌入基于图像内容的Hash值.实验表明,该算法可以抵抗一定程度的JPEG压缩,特别是能够将轻度的JEPG压缩和对图像局部少量像素的修改区分开来.

关 键 词:半易损性水印  图像内容  小波变换

Improving Fragileness of Semi-fragile Digital Watermarking by Using Hash Function
Zhang Zhongyue,Qi Kaiguo.Improving Fragileness of Semi-fragile Digital Watermarking by Using Hash Function[J].Journal of Computer-Aided Design & Computer Graphics,2004,16(6):845-849.
Authors:Zhang Zhongyue  Qi Kaiguo
Abstract:In this paper a novel method of semi-fragile digital watermarking is proposed based on both spatial and discrete wavelet transform domain. In order to improve the fragileness of watermark, the wavelet transform domain of the image is embedded with the Hash value based on the original image. The experimental results show that this algorithm is robust to JPEG compression. It can distinguish low-grade JPEG compression from the tampering of a small amount of pixels the original image especially.
Keywords:semi-fragile watermarking  image content  wavelet transform
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