关键词: 图像融合, 置乱, 伪随机序列, 混沌序列, 单向函数

Abstract: Encryption is very important in image data transmission on Internet, but most of all encryption algorithms following the principle of dynamics of recession will be degraded into a cyclical algorithm, which leads to the leakage of image information and so on. Based on pseudo-random points, a mixed image fusion algorithm was presented. Firstly the image was divided into 8 × 8 small blocks, and then each block was transformed to create a pseudo-random sequence. The image block pixel values and their related pseudo-random sequence were fused and scrambled, and the image after EZW coding was scrambled again by chaotic sequence. Test results show that the algorithm has good security, and the algorithm is also relatively easy to achieve.

Key words: image fusion, permutation, pseudo-random sequence, chaos sequence, one-way function