摘要
利用层间小波系数的关系,并结合新颖的样本选取方法提出了一种多功能彩色图像数字水印嵌入方法,使鲁棒数字水印和易碎数字水印共存于同一图像中.数字水印信号为利用混沌序列生成的二值图像,数字水印嵌入的颜色通道和位置由密钥决定,具有非常好的安全性;数字水印的提取和图像认证不需要原始图像.实验表明,该方法嵌入的数字水印保证了数字水印的不可见性以及相关数字水印的稳健性和易碎性.
A multifunctional watermarking algorithm for color image is presented based on the rapport of wavelet coefficients and the choice swatch method; so robust watermark and fragile watermark exist in an image. The watermark is a binary image based on chaotic sequences, and using key to determine the position of watermark in the image, which can assure very good security for the watermark. The watermark is extracted without the original unmarked image. The experiments show that the algorithm can assure good imperceptibility for watermarked image and the watermark embedded using the algorithm has good robustness and fragility.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2004年第6期97-100,共4页
Engineering Journal of Wuhan University
基金
国家民委重点科研项目资金基金(MZY02004).
关键词
多功能数字水印
小波变换
混沌序列
multifunctional digital watermarking
wavelet transform
chaotic sequence
