现代数字信号处理在数字水印中的应用.pdf

现代数字信号处理在图像处理中的应用 摘要 随着信息时代的到来，特别是Internet 的普及，信息的安全保护问题日益突 出。伴随着互联网和数字多媒体技术的飞速发展，如何保护多媒体作品的版权和 鉴别其真伪成为际上研究的热门课题，数字水印技术是近些年提出的一种信息隐 藏技术，该技术为多媒体信息的版权保护提供了一种新的方法。数字水印作为信 息隐藏技术研究领域的重要分支，是实现版权保护或跟踪侵权行为的有效方法。 本文针对基于小波变换的数字水印技术，提出了一种基于小波域的二值图像 水印算法。该算法选择了检测结果直观、有特殊意义的二值图像作为原始水印， 并在嵌入之前进行图像置乱预处理，以提高安全性和隐蔽性，兼顾了水印的不可 见性和鲁棒性，利用多分辨率分析思想进行水印的嵌入与提取。通过大量的仿真 实验，证明本文算法在保证水印不可见性的同时，对常见的图像处理如JPEG 压 缩、噪声、滤波、剪切等，均有较好的鲁棒性。 关键词：小波变换，数字水印，鲁棒性，不可见性 Abstract With the advent of the era of information, especially the popularity of the Internet, information security problem increasingly prominent. With the rapid development of Internet and digital multimedia technology, how to protect the copyright of multimedia works, and verify its authenticity become on the international research hot topic, digital watermarking technology is put forward a kind of information hiding technology in recent years, the technology of multimedia information copyright protection provides a new method. Digital watermarking technology as an important branch in the field of information hiding technology research, is to realize the effective method of copyright protection or tracking tort. In this paper, based on wavelet transform the digital watermarking technology, a wavelet domain based on the binary image watermarking algorithm. The algorithm chosen the test results intuitive, with special significance in the value of the original image as a watermark and embedded in the image scrambling prior to the pretreatment to enhance the safety and concealment; watermark does not take into account the visibility and robustness, Use of multi-reso