基于多混沌映射的水文遥测图像处理技术

Optical image encryption algorithm based on multi chaotic maps

近年来水情遥测技术已成为水文行业中一种新兴的监测技术,鉴于水情遥测图像在商业中的安全性与重要性,提出一种基于多混沌映射的水文遥测图像处理技术。该算法在置乱阶段引入Logistic映射产生Arnold映射的控制参数,先利用Arnold映射对水尺图像进行位置置乱,得到置乱图像;再利用Henon映射与置乱图像进行异或运算,充分打乱图像的像素相关性,达到了良好的加密效果。仿真结果表明,该算法简单且密钥空间大,有效地提高了水情遥测图像的安全性及准确性,且计算复杂度较低、通信成本开销小。

In recent years,hydrological telemetry technology has become a new monitoring technology in the hydrological industry. In view of the safety and importance of hydrological telemetry image in business,a hydrological telemetry image processing technology based on multi-chaotic mapping is proposed. In the scrambling stage,Logistic mapping is introduced to generate the control parameters of Arnold mapping. Firstly,Arnold mapping is used to scramble the position of the ruler image to get the scrambled image. Then,Henon mapping and scrambled image are used for XOR operation,which can fully disturb the pixel correlation of the image and achieve good encryption effect. The simulation results show that the algorithm is simple and has large key space,which effectively improves the security and accuracy of hydrological telemetry images,and has low computational complexity and low communication cost.