A color image watermarking scheme based on ... - Semantic Scholar
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A color image watermarking scheme based on ... - Semantic Scholar
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Signal Processing 84 (2004) 95 – 106
www.elsevier.com/locate/sigpro
A color image watermarking scheme based on color quantization Piyu Tsaia , Yu-Chen Hub;∗ , Chin-Chen Changa a Department
of Computer Science and Information Engineering, National Chung Cheng University, Chiayi, Taiwan 62107, ROC of Computer Science and Information Management, Providence University, Taichung, Taiwan 433, ROC
b Department
Received 1 October 2001; received in revised form 12 November 2002
Abstract Digital watermarking has been widely applied to solve copyright protection problems of digital media relating to illegal use or distribution. In the past few years, several gray-level image watermarking schemes have been proposed, but their application to color image watermarking schemes is scarce and usually works on the luminance or individual color channel. In this paper, a new color image watermarking scheme based on the color quantization technique is proposed. Experimental results are shown to demonstrate the validity of the proposed scheme. Furthermore, the proposed scheme can be applied to other multimedia applications that are based on the color quantization technique. ? 2003 Elsevier B.V. All rights reserved. Keywords: Image watermarking; Color quantization; Pixel mapping; DES
1. Introduction Due to the nature of digital media and the popularity of the Internet, illegal operations such as duplication, modi;cation, forgery, etc. performed on digital media are easy, fast, and di
