Image Content-based Watermarking Resistant against Geometrical Distortions
作者单位：School of Computer ScienceHuazhong University of Science＆Technology
会议名称：《2006 8th International Conference on Signal Processing》
主办单位：Chinese Institute of Electronics;et al;IEE;IEEE Beijing Section;National Natural Science Foundation of China;URSI
会议日期：2006年
学科分类：0839[工学-网络空间安全] 08[工学] 081201[工学-计算机系统结构] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：supported by the Natural Science Foundation of China under Grant No.60502024 the Natural Science Foundation of Hubei Province under Grant No.2005ABA267 the Electronic Development Fund of Ministry of Information Industry of China the Innovation Fund for Technology Based Firms of Ministry of Science and Technology of China under Grant No.04C26214201284
关 键 词：Digital watermarking
摘 要：正A geometrically robust watermarking scheme was proposed based on image local content,which could resist both image cropping and RST *** first extracts the robust feature points,and then partitions the image into multi circular *** area is transformed into PM sub-images,then 2-D DFT is performed and the magnitudes are used as the watermark-embedding *** the watermark is embedded by modifying the DFT magnitudes using energy *** with Fourier-Mellin transform-based watermarking,its computational cost is reduced as only one 2-D DFT is performed. Moreover,the method can overcome the interpolation problem by using PM in the spatial domain because images have a similar scale between neighboring pixels.