Applications of Digital Watermarking Techniques─Case Studies of a Bird Photographer

• Main Authors: Jui-Chen Kuo, 郭睿誠
• Other Authors: Yuan-Liang Tang
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/07607080673206288960

碩士 === 朝陽科技大學 === 資訊管理系碩士班 === 95 === As digital images prevail, traditional film developing techniques have become a history and digitized data have replaced paper documents. Although digital images are very easy to copy and transmit, a third party may maliciously copy, reproduce, or synthesize a copyrighted image using advanced technologies. Such a conduct not only violates the intellectual property rights, but the interests of the original creators also suffer significantly. In the past few years, a large number of digital watermarking techniques emerged to solve the copyright problems of digital media, for example image authentication and recovery, digital watermarking techniques, Internet applications of watermarks, information hiding, and so on. However, these studies were usually restricted in the theoretical or technological aspects, and hence are not mature enough to solve practical problems in the area of photography. In the thesis, studies on the copyright-violation cases of a professional photographer, Mr. Lin Ying-Dian, are performed with the purpose of advancing the technologies of digital watermarking. Mr. Lin Ying-Dian has been working on ecological photography for more than 10 years, with the specialty in photographing wild birds. His photos are verypopular and have been used in calendars, books, magazines, the Internet, and all kinds of publications. Accompanying Mr. Lin’s fame, however, is a considerable amount of plagiarism of his photos, and there have been more than 100 cases undergoing lawsuit so far. In spite of the achievements of watermarking techniques, none of those cases were resolved with the help of information technologies. In stead, most of them are solved by comparing the plagiarized image and the original, which is kept by Mr. Lin. This thesis studies various cases of plagiarism encountered by Mr. Lin Ying-Dian, with the focus on analyzing how the original images are reproduced and finding out what features a watermarking technique should have in order to solve real problems.