基于图像表面积的置乱程度评价算法  

An evaluation algorithm of image scrambling degree based on the image area

作　　者：王新新[1] 布挺[2] 

机构地区：[1]洛阳理工学院计算机与信息工程系,河南洛阳471023 [2]洛阳理工学院电气工程与自动化系,河南洛阳471023

出　　处：《安徽大学学报（自然科学版）》2011年第4期48-52,共5页Journal of Anhui University(Natural Science Edition)

摘　　要：数字图像置乱技术是数字图像加密、信息隐蔽、数字水印的常用方法,如何衡量一种置乱变换的好坏是近年来的研究热点.论文根据置乱前后数字图像表面积随像素点位置变化而改变的原理,提出一种基于图像表面积的置乱度评价算法.实验结果表明:该算法能够较好地反映置乱次数与置乱度的关系,与人的视觉基本相符.Digital image scrambling technology is the usual method for the digital image encryption,information hiding,and digital watermarking.And how to evaluate the scrambling degree is a hot subject in recent years.According to the principle that the gray-scale spatial area of the digital image would vary with the changes of the pixel points＇ positions after the scrambling,this thesis proposed an evaluation algorithm of image scrambling degree based on the area of the image.The experimental results indicated that this algorithm could reflect the relations between the scrambling times and the scrambling degree well,which basically was consistent with the vision of the human.

关 键 词：图像表面积 置乱度 评价算法 

分 类 号：TP751.1[自动化与计算机技术—检测技术与自动化装置]