基于三维混沌映射的HSV空间图像加密算法研究

Encryption Algorithm Based on 3D Chaotic Mapping in HSV Space

针对HSV空间上的数字图像,构建了一种基于Feng三维混沌映射的图像加密方法.如果原始图像是RGB格式的,可以先将其转变到HSV空间下.进而,通过Feng映射构建x、y、z三个方向上的截断数据序列.根据这三个序列的索引排序,对数字图像的H、S、V三个通道信息进行置乱.实验结果表明,文件中方法获得了理想的图像加密效果,加密后的图像在3个方向上的相关性都在0.01以下.

According to the digital image in HSV space,an image encryption algorithm has been built based on3 D Feng chaotic mapping. If the original image is the RGB format,it should be converted to HSV space. And then,the truncated data sequence could be constructed in x,y,z three directions by Feng mapping. According to index of these three sequences,information of H,S,V three channels were scrambled. Experimental results show that the proposed method can obtain ideal encryption effect,and three directions relevance of encrypted image are all below 0. 01.