一种基于位置变换和灰度变换相结合的数字图像置乱方法

摘要

Digital image scrambling technology has been widely used in image encryption.As an encryption technology,it usually hide image information by change the pixel position in the image or change the gray value of the image.This paper presents a simple image scrambling method based on integrate gray space transform into position space transform.Simulation results and analysis show that the new method obviously improved scrambling degree of traditional image scrambling methods.%图像置乱技术在数字图像加密中有着广泛应用。作为一种图像加密技术,它主要通过改变原图像中各像素位置或改变像素灰度值的方式达到对图像信息进行隐藏的目的。提出一种易于实现的将像素位置变换和像素灰度变换相结合的数字图像置乱方法。实验证明该方法相对传统算法置乱效果得到明显加强。