Color image encryption based on the Multiple-order discrete fractional cosine transform and chaos in YCbCr space
Based on the theory that a color image can be decomposed into three primary components and each one can be seen as a gray image,we propose a color image encryption method with multiple-order discrete fractional cosine transform (MODFrCT),which is a kind of encryption with the secrecy of pixel value and pixel position simultaneously.The complex number mode that has a real part and an imaginary one is used in this encryption method to save the transmission channel.Human vision is more sensitive to the Y component than to other two components in YCbCr color space and this color format is used for encrypting the color image.Chaos is introduced to scramble the image phases both in spatial and transformation domains.The numerical simulations demonstrate the validity and efficiency of this scheme and the robustness of the method against occlusion attack is examined.
color image encryption multiple-order discrete fractional cosine transform YCbCr
Xianzhe Luo Nanrun Zhou Qingmin Zhao Jianhua Wu
Department of Electronic Information Engineering,Nanchang University,Nanchang 330031,China
国际会议
沈阳
英文
1839-1843
2012-09-07（万方平台首次上网日期，不代表论文的发表时间）