Crop the irrelevant part of the Image

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Zaheer Abbas 2017-4-28

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https://ww2.mathworks.cn/matlabcentral/answers/337751-crop-the-irrelevant-part-of-the-image

回答： Image Analyst 2017-5-2

I am new to Matlab. I want to crop the highlighted part of the gray image and remove the rest part. How to do that, kindly explain as well. Thanks.

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Zaheer Abbas 2017-5-2

One last help please!

Image Analyst 2017-5-2

You have not attached the original image. Not the cropped one, and not the one with the red box on it, but the original image. So, did you even try stdfilt()?

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Image Analyst 2017-4-28

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https://ww2.mathworks.cn/matlabcentral/answers/337751-crop-the-irrelevant-part-of-the-image#answer_264944

在 MATLAB Online 中打开

If you know the bounding rows and columns, you can do indexing

croppedImage = rgbImage(row1:row2, col1:col2, :);

or use imcrop():

croppedImage = imcrop(rgbImage, [leftCol, topRow, (rightCol-leftCol+1), (bottomRow-topRow+1)]);

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Image Analyst 2017-4-29

Yes, but that was not the original question so I didn't answer that. You could use stdfilt() and threshold and find the bounding box. Search for braille here - I know I've done code for it before.

Zaheer Abbas 2017-5-1

Sir, I tried to find the code, but couldn't find it. If you please help with the code (crop through bounding box). Really sorry, but I am really stuck in this. I have very little time. Thanks in Advance

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更多回答（2 个）

KSSV 2017-4-28

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编辑：KSSV 2017-4-28

在 MATLAB Online 中打开

doc imcrop

When propted, draw a rectangle in your interested area.

I = imread('your image') ;   % Read image
imshow(I) ;
I1 = imcrop(I) ;  % crop the image
imshow(I1)
imwrite(I1,'croppedimage.jpg');   % save the image

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KSSV 2017-4-28

How about picking up half of the matrix after imread?

Zaheer Abbas 2017-4-29

Thanks a lot sir! :) It helped me..

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Image Analyst 2017-5-2

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https://ww2.mathworks.cn/matlabcentral/answers/337751-crop-the-irrelevant-part-of-the-image#answer_265423

test.m

Zaheer, I'm sure by now you've tried to take my suggestion and use stdfilt() to automatically get the bounding box. You can look at how I did it and compare it to your own.