Image Compressing and Encrypting Approach Based on Fractal and Knight Tour
Mou Yufe · Video Engineering · 2014
An image compressing and encrypting approach is proposed.Firstly,the route which the knight tour generated is used as a secret key,and it is expressed with matrix,each element in the matrix corresponds to the range block in the image fractal coding.Then carry out fractal coding acted on the route and start from some element with some step.Quad-tree is used to ensure the decoding image quality.The decoding is the inverse process of coding.Experiments test the scrambling measure and sensitivity of secret key,and show that the compression ration is better than JPEG under some decoding image quality.