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How can I make automatic crop?

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wisam kh
wisam kh on 24 Jun 2018
Commented: wisam kh on 25 Jun 2018
Hello
How can I make automatic crop around core? like
.
  2 Comments
Rik
Rik on 24 Jun 2018
Have a read here (or here for more general advice) and here. It will greatly improve your chances of getting an answer.

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Accepted Answer

Image Analyst
Image Analyst on 24 Jun 2018
Why do you need to crop it?
Anyway, if you do for some reason, you can just binarize and look for the min and max row and column.
binaryImage = imbinarize(grayImage);
[rows, columns] = find(binaryImage);
row1 = min(rows);
row2 = max(rows);
col1 = min(columns);
col2 = max(columns);
croppedGrayImage = grayImage(row1:row2, col1:col2);
imshow(croppedImage);
  5 Comments
Image Analyst
Image Analyst on 24 Jun 2018
Edited: Image Analyst on 24 Jun 2018
Well there's the problem. You totally ignored my code in my answer, and did it your own (wrong) way. Why?
wisam kh
wisam kh on 25 Jun 2018
I am sorry sir, I did not ignore your answer, but I tried it and did not succeed.
BW=im2bw(img,0.8);
[rows, columns] = find(BW);
row1 = min(rows);
row2 = max(rows);
col1 = min(columns);
col2 = max(columns);
croppedImage = img(row1:row2, col1:col2);
figure, imshow(croppedImage);title('crop Image');
but the problem was here: BW=im2bw(img,0.8);
that should be : BW=~im2bw(img,0.8);
Now the problem has been solved
am sorry
Thank you so much for your time and effort
I apologize to you again

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