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image cropping location problem

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MOHAMED GILANI
MOHAMED GILANI 2021-11-21
回答： yanqi liu 2021-11-22
why i got diffrent location of crop when i change the image im using btw im using the same value of coordinate but the location is diffrent
  7 个评论
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DGM
DGM 2021-11-21
Provide a simplified and concrete example demonstrating the problem.
Matt J
Matt J 2021-11-21
Maybe the images are not all the same size. Therefore, the cropping coordinates don't cover the same spatial region in all cases.

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采纳的回答

yanqi liu
yanqi liu 2021-11-22
Ran in:
sir，may be use the rate，such as
clc; clear all; close all;
im = imread('cameraman.tif');
sz = [size(im, 1) size(im, 2)];
rect = round([sz(2)/2 sz(1)/2 sz(2)*0.2 sz(1)*0.3]);
im2 = imcrop(im, rect);
figure;
subplot(1, 2, 1); imshow(im);
hold on; rectangle('position', rect, 'EdgeColor', 'g', 'LineWidth', 2)
subplot(1, 2, 2); imshow(im2);
im = imread('football.jpg');
sz = [size(im, 1) size(im, 2)];
rect = round([sz(2)/2 sz(1)/2 sz(2)*0.2 sz(1)*0.3]);
im2 = imcrop(im, rect);
figure;
subplot(1, 2, 1); imshow(im);
hold on; rectangle('position', rect, 'EdgeColor', 'g', 'LineWidth', 2)
subplot(1, 2, 2); imshow(im2);

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