【作者】 杨红梅；

【导师】 梁永全；

【作者基本信息】 山东科技大学 ， 计算机应用技术， 2003， 硕士

【摘要】 版权保护在国内外一直是备受关注而又不好解决的一大难题，数字媒体的版权保护问题又尤其严重。这些数字化的图形、文字以及音频、视频作品的易存储加工、易传输复制的优点加快了知识与信息的交流与传播，但同时也为一些非法者提供了恶意篡改、攻击、盗用他人劳动成果的便利条件。随着互联网和多媒体技术、通信技术的迅速发展，数字媒体的版权保护问题日益突出，使得数字水印技术备受人们的关注。数字水印技术是近几年兴起的一门全新技术，为实现有效的知识产权保护提供了一条崭新的思路，近年来已成为多媒体信息安全研究领域的一个热点课题。 本文对数字图象水印技术及其应用作了较为深入的分析与研究。主要在以下几个方面作了做出了努力： 1、从水印的由来、现状、基本原理、特点、分类与主要用途等方面对数字水印技术基本知识作了概括性的总结与分析。 2、对数字水印的嵌入与检测技术进行了总结和探讨，并通过分析各种图象压缩编码方法给出了几种具体水印处理策略。 3、给出了一种利用图象自身特点嵌入水印的小波域数字水印算法，具有很强的不可见性和鲁棒性。 4、给出了一种利用人类视觉纹理、亮度和蓝色通道掩蔽特性嵌入水印的算法，该算法在保证水印不可见性的同时，对常见的图象处理表现出较好的鲁捧性。更多还原

【Abstract】 Copyright protection receives much concern both at home and abroad, and some problems related to it are difficult to solve, especially to the protection of digital media copyright. These digital media including images, characters, audio and video digitalized works are easy to store, design, transmit and duplicate, and accelerate communication and transmission of knowledge and information. While it offered convenience to some illegal persons who can distort, attack and pirate the achievement maliciously at the same time. With the rapid development of internet, multimedia and communication technology, protection of digital media copyright has been paid more and more attention, which makes technology of digital watermark concerned by people extremely. As a novel technology, digital watermark rises in recent years, and offered brand-new thought to realize effective protection of intellectual property. Now it has become a research hotspot in the field of multimedia information security.Watermark technology and its application of digital image is comparativelyanalyzed and studied in this thesis. It mainly includes the following several aspects:1. Recapitulative summary and analysis of basic technology of digital watermark is presented from the origin, state of art, basic principles, characteristics and classifications of watermark.2. Summary and discussion of detection technique of digital watermark embedding is carried out. Several handling strategies of concrete watermarks are put forward through analyzing each image compressing and coding method.3. An algorithm of watermark based on wavelet transform domain is put forward,which embeds watermark into wavelet transform domain according to its owncharacteristic of image and has excellent invisibility and robustness.4. An algorithm of watermark is put forward. It embeds watermark via masking characteristic of human vision texture, luminance and blue channel. This algorithm ensured the invisibility of watermark and demonstrated better robustness in common image processing.更多还原