1、PDF外文:http:/ 3535 字 使用纠错码的基于人类视觉系统的数字水印方案 学 院: 信息科学与工程学院 专 业: 计算机应用技术 5 班  
2、;学生 姓名: 学 号: &n
3、bsp; 日 期: 摘 要 数字水印已经被 提 议作为一种主要的 版权保护的方法。本文我们试图用纠错码技术、小波变换的多种 解决方案、以及人类视觉系统去提高传统的水印技术。基于水印的纠错技术 具有一种自动纠正 提取的 水印的错误的特性。 将用HVS( 人类视觉系统 ) 模型 研究人类感知部分的特征(例如:光(强)度或色调)和如何把水印 嵌 入到原始数据中, 那 里人类的感知 敏感性是相对弱的 。 在每个离散
4、小波变换( DWT)域的频带中选择一种基于小波变换的多种解决方案的水印, 并且 它能 阻止破坏 图像处理。 我们通过实验证明了带有 ECC(纠错码)的水印 比不带 ECC 的传统的水印好得多。 关键词:离散小波变换,人类 视觉系统,纠错码, BCHAbstract Digital watermarking has been proposed as a way to claim protection. In this paper, we try to use the error-correcting code skill, the multiresolution of wavelet
5、 transformation, and the human visual system to improve the traditional watermarking, Error-correcting based watermark will have the property that corrects errors of the extracted watermark automatically. The HVS(Human Visual System)model will be presented to investigate perceptually characteristic
6、parts of human(e.g. intensity or hue) and how to insert the watermark into the original data, where the perceptual sensitivity of human is relatively low. A multiresolution watermarking based on the wavelet transformation is selected in each frequency band of the Discrete Wavelet Transform (DWT) domain and therefore it can resist the destruction of image processing. In our experiments, the results show that the robustness of a watermark with ECC(Error Correct Coding) Is much better than the traditional one without ECC. Key Words:DWT, Watermark, HVS, Error-correcting Code, BCH