摘要
以灰度图像为研究对象,对原始载体图像进行3层小波分解;对水印图像预处理,Arnold变换,采用时空混沌模型生成混沌序列对水印进行置乱加密,再将水印图像扩展为原始图像的两倍大小,离散化;把预处理后的水印信息按特定方式嵌入到分解后的载体图像中,再进行相应的变换处理,得到嵌有水印的图像。法旨在研究保护JPEG2000图像作品版权的数字水印方案。
In the algorithm, the original image is transformed by 3--DWT and the watermarking image is processed previously by some means, such as Arnold transform, the watermarking image is encrypted randomly by the chaos sequence generated by the spatiotemporal chaos and expanded for the primitive image two time of sizes. The watermarking image processed previously is embedded the original image decomposed. Then the image embedded by watermarking is gained through the corresponding transform. The purpose of the watermarking algorithm is studying digital watermarking means how to protect the copyright of JPEG2000 image work well in security and robustness.
出处
《计算机与数字工程》
2008年第12期108-110,共3页
Computer & Digital Engineering
