文章基本信息

标题：CRT再撮映像に耐性を有する電子透かし
本地全文：下载
作者：中村晴幸 ; 合志清一 ; 藤井亮介等
期刊名称：映像情報メディア学会誌
印刷版ISSN：1342-6907
电子版ISSN：1881-6908
出版年度：2006
卷号：60
期号：11
页码：1778-1788
DOI：10.3169/itej.60.1778
出版社：The Institute of Image Information and Television Engineers
摘要：Digital watermark is a technology that protects digital intellectual property from being illegally copied and distributed by embedding it with information such as copyrights. By presenting the copyrights, digital watermarks serve as available technology for protecting the rights governing use of intellectual property. Recently, distribution of images taken from CRTs or other kinds of screens has become a problem. This is because current methods have difficulties detecting digital watermarks in the re-shot images. We present a method that can detect digital watermarks in moving images taken with a consumer camera from a CRT monitor connected to an NTSC signal system. The method can embed information in both temporal and spatial domains. It is embedded for a relatively long time and in low spatial frequencies to avoid degradation of images. The method can also detect digital watermarks in re-shot images that degrade in high frequencies. In addition, it can detect digital watermarks in real time without using the original images. This paper describes the method, presents an experimental system based on it, and verifies its effectiveness with various types of moving images. We also examine various aspects of the robustness needed for watermarks embedded with this method.
关键词：電子透かし;再撮映像;再撮耐性;ディジタルシネマ