Chaos Based Image Compression and Encryption Algorithm
Yan Liu · Intelligent Computer and Applications · 2015
Chaos is a kind of complex nonlinear motion. It has many typical properties such as ergodicity,sensitivity to initial conditions,broad spectrum,and random- like behaviors. So chaos is connected with cryptography closely. A Chen chaotic mapping based image compression and encryption algorithm is proposed in the paper. The original image is pretreated and then the image data are compressed by the discrete cosine transform and the entropy coding. The pseudorandom key- stream sequences generated by the Chen mapping are used to scramble and diffuse the image pixels and get the cipher image. Experimental tests and analysis show that the proposed algorithm performs well.