抠图放大 | 汪广鑫の小pò站

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用于从图像中抠出一部分来绘制这种细节对比图

我怕我把代码弄丢，所以记下来。

retanc.m

clear;close all; clc;
file_name = 'zxs2015_120721.jpg';
I = imread(file_name);
I = im2double(I);

set(gcf,'CurrentCharacter','@'); % set to a dummy character
figure(1),imshow(I);
disp('Please select the region on the image.');
[x1,y1] = ginput(2);
% x1 = [286;520];
% y1 = [783;1006];
% set(gcf,'CurrentCharacter','@'); % set to a dummy character
% figure(1),imshow(I);
% disp('Please select the region on the image.');
% [x2,y2] = ginput(2);

I_tmp = insertShape(I, 'Rectangle', [x1(1),y1(1),x1(2)-x1(1),y1(2)-y1(1)], 'LineWidth',5, 'Color', 'red'); 
% I_tmp = insertShape(I_tmp, 'Rectangle', [x2(1),y2(1),x2(2)-x2(1),y2(2)-y2(1)], 'LineWidth', 5, 'Color', 'red'); 
figure(2),imshow(I_tmp);

I_cut1 = I(y1(1):y1(2),x1(1):x1(2),:);
% I_cut2 = I(y2(1):y2(2),x2(1):x2(2),:);
figure(3),imshow(I_cut1);
% figure(4),imshow(I_cut2);

imwrite(I_tmp,[file_name(1:end-4),'_cut.jpg']);
imwrite(I_cut1,[file_name(1:end-4),'_cut1.jpg']);
% imwrite(I_cut2,[file_name(1:end-4),'_cut2.jpg']);
save([file_name(1:end-4),'.mat']);

retanc_load.m

clear;close all; clc;
load('5.mat');
file_name = '5.png';
I = imread(file_name);
I = im2double(I);

I_tmp = insertShape(I, 'Rectangle', [x1(1),y1(1),x1(2)-x1(1),y1(2)-y1(1)], 'LineWidth', 5, 'Color', 'blue'); 
% I_tmp = insertShape(I_tmp, 'Rectangle', [x2(1),y2(1),x2(2)-x2(1),y2(2)-y2(1)], 'LineWidth', 5, 'Color', 'red'); 
figure(2),imshow(I_tmp);

I_cut1 = I(y1(1):y1(2),x1(1):x1(2),:);
% I_cut2 = I(y2(1):y2(2),x2(1):x2(2),:);
figure(3),imshow(I_cut1);
% figure(4),imshow(I_cut2);

imwrite(I_tmp,[file_name(1:end-4),'_cut.jpg']);
imwrite(I_cut1,[file_name(1:end-4),'_cut1.jpg']);
% imwrite(I_cut2,[file_name(1:end-4),'_cut2.jpg']);