基于多小波变换的彩色数字水印

随着数字多媒体技术的发展，数字水印技术已经成为数字版权保护领域的一个研究热点．多小波所拥有的对称性、正交性、有限支撑等重要特性弥补了单小波的不足．针对传统数字水印技术的有限性，通过对频域数字水印算法进行分析，提出了一种新的数字水印算法．新算法以提升格式小波变换为基础，对原始图像和水印图像进行提升格式小波变换，将水印信息嵌入到中频系数中．实现了二维彩色图像将为水印信息嵌入到二维图像数据中．实验证明，新算法在对彩色图像进行水印处理方面达到较好的效果，具有较好的健壮性．

Color Image Watermark Based on Multi-Wavelet Transform

With the development of digital multimedia technology, digital watermark has becoming a popular topic in the field of digital copyright protection. Multi-wavelet has some very important properties such as orthogonality, symmetry, and short support, which makes up for the shortcoming of scalar wavelet. Aim at the shortcomings of the traditional digital watermark methods, analysis the frequency domain watermark algorithm, propose a new digital watermark method. The new method based on multi-wavelet transform, embedded the watermark information into intermediate frequency. Accomplish embedding 2d true color images as watermark information into the 2d color images. Experimental results show that the new method has an excellent effect in 2d true color images digital watermark processing. The experimental results also demonstrate that the new method has an good.