摘要
多媒体数字水印可以为媒体提供所有权证明和知识产权保护,或用来验证媒体的内容是否真实可信。该文提出一种基于空间域的彩色图像水印算法,利用不同处理和攻击对YUV彩色空间中亮度通道Y和色度通道UV的破坏力不同的特性,根据图像亮度和纹理的不同,对亮度和色度通道分别嵌入不同强度的水印信息。在水印检测算法中,为提高水印对图像增强处理的稳健性,对待检图像和原始图像进行了归正。实验结果表明该方法能很好地抗击JEPG压缩的攻击,同时对中值滤波等低通滤波器、亮度/对比度等图像增强、锐化、平滑、栅栏及噪声干扰等攻击也具有较好的稳健性。
Digital watermarking can provide copyright protection and authentication to the owner or user of multimedia.In this paper,a new watermarking algorithm of color image in spatial domain is proposed.It embeds watermark in Y channel and UV channels separately,since different attacks destroy watermark in luminance and chrominance with dif-ferent effects.To improve the robustness of watermark against brightness and contrast conversion,the watermarked image and original image are firstly normalized,and then analyzed to extract watermark.The experimental results show that the proposed algorithm is robust to JPEG compression as well as attacks of low-pass filter,brightness /contrast conversion,sharpen,soften,posterize,and noise.
出处
《计算机工程与应用》
CSCD
北大核心
2002年第1期62-64,73,共4页
Computer Engineering and Applications
基金
浙江省自然科学基金资助项目(编号:698064)
浙江省教育厅科技计划项目(编号:20010252)
宁波市重点博士基金项目(编号:01J20300-05)
关键词
数字水印
JPEG压缩
彩色图像
攻击
digital watermarking,JPEG compression,color image,attacks
