摘要
针对彩色图像的版权保护应用,提出一种基于分块三维离散余弦变换的彩色图像水印方案。对彩色图像进行分块的三维离散余弦变换,嵌入水印时,对三维离散余弦变换系数的直流分量和第二分量分别采用量化和关系的方法嵌入水印信号;提取水印时,分别采用量化和关系提取算法提取水印信号并进行比较,选取相似值高的水印作为最终提取的水印信号。仿真结果表明,该算法具有较好不可感知性和抵抗多种攻击的能力,与其它相似的算法相比,具有更优越的性能。
For color image copyright protection applications, a color image watermarking scheme based on three-dimensional dis crete cosine transform （3D-DCT） was proposed. The original color image was subdivided to non-overlapping blocks, and 3D DCT was performed on each block. During the embedded watermarking stage, quantization method and relationship method were used to embed watermarking in the DC component of the three-dimensional discrete cosine transform coefficients and second com- ponents, respectively. During the watermarking extraction stage, the watermarking signal was extracted using quantization method and relationship method separately and they were compared, the final watermarking had higher correlation value. Simu- lation results show that the algorithm has good imperceptibility and resistance ability to a variety of attacks. Compared with other similar algorithms, this algorithm performs better.
出处
《计算机工程与设计》
北大核心
2015年第8期2064-2068,共5页
Computer Engineering and Design
基金
国家自然科学基金项目(61309006)
贵州省科学技术厅
贵州师范大学联合科技基金项目(黔科合LH字[2014]7041号)
关键词
彩色图像水印
三维离散余弦变换
关系
量化
鲁棒性
color image watermarking
three-dimensional discrete cosine transform
relationship
quantization
robustness
