Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A New Repeating Color Watermarking Scheme Based on Human Visual Model | EURASIP Journal on Applied Signal Processing 2004 13 1965-1972 2004 Hindawi Publishing Corporation A New Repeating Color Watermarking Scheme Based on Human Visual Model Chwei-Shyong Tsai Department of Management Information System National Chung Hsing University Taichung 402 Taiwan Email tsaics@ Chin-Chen Chang Department of Computer Science and Information Engineering National Chung Cheng University Chiayi 621 Taiwan Email ccc@ Received 26 November 2001 Revised 6 March 2004 Recommended for Publication by Yung-Chang Chen This paper proposes a human-visual-model-based scheme that effectively protects the intellectual copyright of digital images. In the proposed method the theory of the visual secret sharing scheme is used to create a master watermark share and a secret watermark share. The watermark share is kept secret by the owner. The master watermark share is embedded into the host image to generate a watermarked image based on the human visual model. The proposed method conforms to all necessary conditions of an image watermarking technique. After the watermarked image is put under various attacks such as lossy compression rotating sharpening blurring and cropping the experimental results show that the extracted digital watermark from the attacked watermarked images can still be robustly detected using the proposed method. Keywords and phrases secret sharing digital watermark human visual model. 1. INTRODUCTION With the improvement of telecommunications more and more people process transmit and store digital media via Internet. However problems such as illegal use tampering and forgery occur that not only violate copyright laws but also do harm to the monetary profits of the copyright owners. Therefore the protection of the intellectual property for digital media has become an important issue. Recently digital watermarking has successfully provided the methods to guard the intellectual property rights of digital media and some excellent
