摘要
首先研究了彩色图像水印认证系统,提出了一种空域的彩色图像认证方案,该方案首先将原始载体彩色图像转换为二值图像,从而生成水印图像;同时通过哈希运算后获取了消息认证码,为认证图像提供了依据;接着将载体彩色图像从RGB空间中提取B分量进行嵌入水印,载体图像B分量每位像素的高四位,用来计算嵌入图像的位置,每位像素的低4位用于嵌入水印图像,从而生成嵌入水印后的图像,此系统具有较良好的不可感知性,包装了原图像质量.
The color image watermark authentication system is studied and a color image authentication system inspatial-domain is proposed. In the system,the original color image is converted into a binary image as the watermarkimage. The watermark image is hashed to generate authentication code. The B component is extracted from RGB ofthe original color image and is embedded by the watermark image. The high four bits of each pixel in B componentis used in calculating the place of embedding watermark image and the low four bits of each pixel in B component isused in embedding the watermark image. The system is made in experiment. The result shows that the system hasgood imperceptibility.
出处
《河南科学》
2016年第2期277-280,共4页
Henan Science
基金
国家自然科学基金项目(61178068)
四川省教育厅项目(14ZB0223)
关键词
空域
哈希函数
认证
不可感知性
spatial-domain
hash function
authentication
imperceptibility
