Computer-generated hologram watermarking resilient to rotation and   scaling

doi:10.1117/1.2744330

CORC > 北京大学 > 信息科学技术学院

	Computer-generated hologram watermarking resilient to rotation and scaling
	Liu, Min ; Yang, Guanglin ; Xie, Haiyan ; Xia, Mingyao ; Hu, Jianbin ; Zha, Hongbin
刊名	光学工程
	2007
关键词	computer-generated hologram watermarking rotation and scaling log-polar mapping
DOI	10.1117/1.2744330
英文摘要	We propose a new scheme of computer-generated hologram (CGH) watermarking to resist rotation and scaling. To embed the inverse log-polar mapping of a mark pattern's CGH into a cover image, the twin image of the mark pattern can be directly reconstructed by fast Fourier transformation from the log-polar mapping of the watermarked image after rotation and scaling, not requiring a registration step in the extracting procedure. In an experiment, the information position of the twin image is located in the high-frequency domain and the redundant information of the low-frequency component is properly eliminated, so the contrast of the twin image is appropriately enhanced and the basic information of the mark pattern is effectively preserved to be recognized. The experimental results show that the mark-pattern's information can be effectively reconstructed when the watermarked image is scaled by 0.5 to 2 or rotated by any angle, so this watermarking scheme is effectively verified by experiment. (C) 2007 Society of Photo-Optical Instrumentation Engineers.; Optics; SCI(E); EI; 0; ARTICLE; 6; 46
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/397948]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Liu, Min,Yang, Guanglin,Xie, Haiyan,et al. Computer-generated hologram watermarking resilient to rotation and scaling[J]. 光学工程,2007.
APA	Liu, Min,Yang, Guanglin,Xie, Haiyan,Xia, Mingyao,Hu, Jianbin,&Zha, Hongbin.(2007).Computer-generated hologram watermarking resilient to rotation and scaling.光学工程.
MLA	Liu, Min,et al."Computer-generated hologram watermarking resilient to rotation and scaling".光学工程 (2007).