Digital Watermarking by Discrete Cosine Transform

• Main Authors: Jen-Jyh Hwang, 黃仁志
• Other Authors: Taoi Hsu
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/99105407359663155102

碩士 === 世新大學 === 資訊管理學研究所(含碩專班) === 98 === With the rapid development and extensive use of multimedia and network technology, multimedia protection such as image, audio, video is an urgent issue. It has been widely concerned to view watermarking technology as a powerful tool for copyright protection and safety certification. The paper is based on watermarks hiding creation by Discrete Cosine Transform (DCT) to analyze the robustness of the watermarked images. By not affecting the visually indistinguishable, this research hopes to provide bigger help for the area of watermarks hiding and digital documents.