Cut a sub-region in image

5 次查看（过去 30 天）
Rooter Boy
Rooter Boy 2021-2-8
评论： Image Analyst 2021-2-10
Question: Read the 1024x1024 image named "sar.jpg" in Matlab and assign it to the "img" variable. It is aimed to cut a sub-region in this image. Using the values given in the table, write the Matlab code that will create this sub-region that will be of (m, n) size starting from (x, y) point. Write the codes that show this area on the screen and save it in the file.
My tried code:
img = imread('sar.jpg');
img2 = imcrop(I,[234 210 191 130]);
subplot(1,2,1)
imshow(img)
title('orginal image')
subplot(1,2,2)
imshow(img2)
title('Cutting image')
I think, my tried code is not true. If someone help me, i will be very happy.
  3 个评论
显示 1更早的评论
Rooter Boy
Rooter Boy 2021-2-8
I don't understand, so i am not sure. Is this what is required in the question?

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Image Analyst
Image Analyst 2021-2-8
You need to pass img into imcrop(), not I, and you need to subtract 1 from the sizes because of the way imcrop works. You can also do it by indexing. Here is the fixed code:
img = imread('peppers.png');
whos img
img2 = imcrop(img,[234 210 190 129]);
whos img2
img3 = img(210: (210 + 129), 234 : (234 + 190), :);
whos img3
subplot(1,2,1)
imshow(img)
title('Original Image')
subplot(1,2,2)
imshow(img2)
title('Cropped Image')
  2 个评论
Rooter Boy
Rooter Boy 2021-2-9
Sir, i need a full code, "Write the codes that show this area on the screen and save it in the file." How to coded in this case.
Image Analyst
Image Analyst 2021-2-10
I'm sure you've solved it by now, but use imwrite():
fileName = 'Cropped Image.png'; % Whatever you want.
imwrite(img2, fileName); % Write to disk.
And obviously the imshow() does the "show this area on the screen" part of your assignment.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Image Processing Toolbox 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by