A Semi-Fragile Wavelet Transform Watermarking Scheme for Content Authentication of Images  

作　　者：宋好好 张艳 邹春明 

机构地区：[1]Ministry of Public Security Quality Supervision and Testing Center of Security Products for Computer Information System

出　　处：《Journal of Shanghai Jiaotong university(Science)》2009年第5期569-573,共5页上海交通大学学报（英文版）

摘　　要：A novel semi-fragile watermarking scheme for the content authentication of images using wavelet transform(WT) is presented in this paper.It is tolerant to the embedded wavelet image compression methods based on WT such as embedded zerotree wavelet(EZW) ,set partitioning in hierarchical trees(SPIHT) and embedded block coding with optimized truncation(EBCOT) in JPEG2000 to a pre-determined bit-plane,but is sensitive to all other malicious attacks.The image features are generated from the lowest-frequency(LF) subband of the original image as the embedded watermark.The watermark is embedded into the pre-determined bit-plane by adjusting the corresponding values in the given subband.In the process of watermarking authentication,we compare the image features generated from the LF subband of the received image with the embedded watermarking information(the image features of the original image) extracted from the pre-determined bit-plane in the given subband of the received image to decide whether the image is attacked maliciously or processed acceptably(the embedded wavelet compression) .The most important advantage of our watermarking scheme is that the watermark information can be extracted from the watermarked image when detecting watermark,so the received image authentication needs no information about the original image or watermark.Experimental results prove the effectiveness of our proposed watermarking scheme.A novel semi-fragile watermarking scheme for the content authentication of images using wavelet transform （WT） is presented in this paper. It is tolerant to the embedded wavelet image compression methods based on WT such as embedded zerotree wavelet （EZW）, set partitioning in hierarchical trees （SPIHT） and embedded block coding with optimized truncation （EBCOT） in JPEG2000 to a pre-determined bit-plane, but is sensitive to all other malicious attacks. The image features are generated from the lowest-frequency （LF） subband of the original image as the embedded watermark. The watermark is embedded into the pre-determined bit-plane by adjusting the corresponding values in the given subband. In the process of watermarking authentication, we compare the image features generated from the LF subband of the received image with the embedded watermarking information （the image features of the original image） extracted from the pre-determined bit-plane in the given subband of the received image to decide whether the image is attacked maliciously or processed acceptably （the embedded wavelet compression）. The most important advantage of our watermarking scheme is that the watermark information can be extracted from the watermarked image when detecting watermark, so the received image authentication needs no information about the original image or watermark. Experimental results prove the effectiveness of our proposed watermarking scheme.

关 键 词：WAVELET image watermarking information security SEMI-FRAGILE 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TN919[自动化与计算机技术—计算机科学与技术]