Matlab 如何获取灰度图像中某个区域的像素值？
我想获得标记为红色矩形的区域的像素值。我想在此之后裁剪图像Matlab 如何获取灰度图像中某个区域的像素值？,matlab,image-processing,Matlab,Image Processing,我想获得标记为红色矩形的区域的像素值。我想在此之后裁剪图像 以下代码将解决您的问题。但可以有几个更好的解决方案。下次请不要只是问问题，而是展示你已经尝试过的 % 20151116 % crop image by area clc; clear all; img = imread('xgOFu.png'); subplot(1,5,1); imshow(img); xl1 = xlim; title('Original'); imgr = img(:,:,1); subplot(1,5,2)
以下代码将解决您的问题。但可以有几个更好的解决方案。下次请不要只是问问题，而是展示你已经尝试过的
% 20151116
% crop image by area
clc; clear all;
img = imread('xgOFu.png');
subplot(1,5,1);
imshow(img);
xl1 = xlim;
title('Original');
imgr = img(:,:,1);
subplot(1,5,2);
imshow(imgr);
xlim(xl1);
title('Red channel');
imgb = im2bw(imgr,.9);
subplot(1,5,3);
imshow(imgb);
xlim(xl1);
title('Binary');
s = regionprops(imgb);
c1 = s.BoundingBox(1);
c2 = s.BoundingBox(1)+s.BoundingBox(3)-1;
r1 = s.BoundingBox(2);
r2 = s.BoundingBox(2)+s.BoundingBox(4)-1;
subplot(1,5,4);
imgc = imgb(r1:r2,c1:c2,:);
imshow(imgc);
xlim(xl1);
title('Crop with border');
s2 = regionprops(imcomplement(imgc));
c3 = s2.BoundingBox(1)+c1;
c4 = s2.BoundingBox(1)+s2.BoundingBox(3)-1+c1;
r3 = s2.BoundingBox(2)+r1;
r4 = s2.BoundingBox(2)+s2.BoundingBox(4)-1+r1;
imgc2 = img(r3:r4,c3:c4,:);
subplot(1,5,5);
imshow(imgc2);
xlim(xl1);
title('Crop without border');
regionprops% 20151116
% filter image by area 2
clc; clear all;
img = imread('xgOFu.png');
imgr = img(:,:,1);
imgb = im2bw(imgr,.9);
[r, c] = find(imgb(:,:,1)==1);
r1 = min(r);
r2 = max(r);
c1 = min(c);
c2 = max(c);
img2 = img(r1:r2,c1:c2,:);
img2r = img2(:,:,1);
img2b = im2bw(img2r,.9);
[r, c] = find(img2b(:,:)==0);
r1 = min(r);
r2 = max(r);
c1 = min(c);
c2 = max(c);
img3 = img2(r1:r2,c1:c2,:);
imshow(img3);
你的评论很难理解。您使用哪个版本的Matlab？似乎您的Matlab版本中没有regionprops。我将尝试更新解决方案。“你也要继续努力。”胡德尼说華得尼
regionpropsregionprops