A Novel Gray Scale Watermarking Algorithm in Wavelet Domain
This paper presents a robust better gray image watermarking algorithm based on the distance in the wavelet transform domain.Firstly,two images will be pretreated:the vector image is transformed into discrete wavelet domain,the level of transform is decided by the size of the watermark image, another pretreatment is that watermark image is scrambled by Arnold transform;Secondly,the edge information which is a binary image is extracted from horizontal and vertical details, and compute the their distance transform matrix which are gray- scale images.After that,the scrambled watermark will be embedded in distance transform matrix using the rule of addition,what is more,the strength parameter of embedding is adaptive,and compute their complements;Finally,The last step is the reconstruction of the watermarked image using inverse wavelet transform according to secret key.The experimental results show that this algorithm has good offensive and security.it has the characteristics of the frequency and spatial,and changes the attitude that the detail coefficients have poor robustness.Distance transform can expand energy of image,so,if the watermark is embedded here,the robustness invisibility are gained at the same time.
Shumei Wang Weidong Zhao Zhicheng Wang
Computer Academy,Xuzhou Normal University,Xuzhou 221116,China CAD Research Center,Tongji University,Shanghai 201804,China
国际会议
2008 IEEE International Conference on Onformation and Automation(IEEE 信息与自动化国际会议)
张家界
英文
470-475
2008-06-20（万方平台首次上网日期，不代表论文的发表时间）