摘要
对数字水印图像加密优化保护版权的研究,可有效提高图像的数字水印效果。数字水印图像加密的研究,需要对数字水印图像信息进行分解,得到低频分量,完成图像数字水印。传统方法根据加密保护版权信号,对彩色图像的亮度及色差进行小波分解,但无法获得图像的低频分量,导致水印效果不理想。提出数字水印图像的加密保护版权算法。利用彩色空间不同通道的信息计算出人眼的视觉临界阈值,结合离散小波变换理论对原始彩色水印图像按视觉临界阈值进行分解,获取数字水印图像的中低频分量,将分解处理后的图像水印信息嵌入,对已嵌入水印的小波系数执行反推转换,对颜色特征属性分量进行叠加,实现对数字水印图像的加密保护版权。实验结果表明,所提方法数字水印图像加密保护版权效率高,水印效果较好。
An algorithm for encryption protection copyright of digital watermark image is propose. Firstly, the in- formation of different channels in color space is used to work out visual critical threshold of human eyes. The original color watermark image is decomposed according to the visual critical threshold integrated with discrete wavelet trans- form to obtain low frequency component in the image. Then, the watermark information is embedded in image ＂after decomposing. Moreover, the back-stepping conversion is executed to wavelet coefficient with embedded watermark and superimposed component of color feature attribute. Finally, the encryption copyright protection is realized. Ex- perimental results show that the method has high efficiency of copyright protection and excellent watermark effect.
出处
《计算机仿真》
北大核心
2017年第7期150-153,共4页
Computer Simulation
基金
贵州省科技厅项目(黔科合J字[2013]2261)
关键词
彩色多尺度
二重数字
数字水印
Color muhi scale
Double digit
Digital watermark
