本文介绍了如何使用matlab计算图像中像素的垂直和水平相关性?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 我想计算加密图像的像素相关性(对于垂直和水平像素对)。我知道corr并将其用作 RHO = corr(X) 但它将相关性作为相关矩阵给出(i想想每个像素,它显示出不同的相关性)但我想要整个图像的一个相关性来比较一些加密图像,通过不同的算法加密。 我尝试了什么: i尝试过 - RHO = corr(图片) 和 corr2(图片); 但它不起作用。I want to calculate the correlation of pixels of an encrypted image (for a vertical and horizontal pair of pixels). i know about the corr and used it as RHO = corr(X)but it's giving correlation as a matrix of correlations (i think for each and every pixel, it is showing different correlation) but i want one correlation for the whole image to compare some encrypted images, encrypted by different algorithms.What I have tried:i tried -RHO = corr(image)andcorr2(image);but it's not working.推荐答案我的朋友Ali B.说...这样: 函数r_xy = AdjancyCorrPixel(P) x1 = double(P(:,1:end-) 1)); y1 = double(P(:,2:end)); randIndex1 = randperm(numel(x1)); randIndex1 = randIndex1(1:3000); x = x1(randIndex1); y = y1(randIndex1); r_xy = corrcoef(x,y); scatter(x,y); xlabel('位置上的像素灰度值(x,y)') ylabel('位置上的像素灰度值(x + 1,y)') 结束 ( 复制和粘贴自: MATLAB Central [ ^ ] )My friend Ali B. says ... this way:function r_xy=AdjancyCorrPixel( P ) x1 = double(P(:,1:end-1)); y1 = double(P(:,2:end)); randIndex1 = randperm(numel(x1)); randIndex1 = randIndex1(1:3000); x = x1(randIndex1); y = y1(randIndex1); r_xy = corrcoef(x,y); scatter(x,y); xlabel('Pixel gray value on location (x,y)') ylabel('Pixel gray value on location (x+1,y)') end(copied & pasted from:MATLAB Central[^]) 这篇关于如何使用matlab计算图像中像素的垂直和水平相关性?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!
09-14 23:11