How can I make automatic crop?

Hello

How can I make automatic crop around core? like

.

[Rik]

Have a read here (or here for more general advice) and here. It will greatly improve your chances of getting an answer.

[wisam kh]

Thank you

Answer 1

[Image Analyst]

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);

[wisam kh]

Thank you But the crop must be surround a specific point that varies from one image to another, I tried your suggestion and did not succeed

[Image Analyst]

Please post your original gray scale image and the code that you used to binarize and crop the image.

[wisam kh]

</matlabcentral/answers/uploaded_files/122639/imge_with%20core.jpg> this image after preprocessing and finde the core

</matlabcentral/answers/uploaded_files/122640/crop_img.jpg> this image after crop

I am currently using this code But crop measurements are not uniform for all images [X,Y]=get_core(binarize_img); % find core point

i1=X-30;

i2=X-30;

i3=Y-30;

i4=Y-30;

M = imcrop(original_img,[i1 i3 i2 i4]);

figure, imshow(M);title('crop Image');

[Image Analyst]

Well there's the problem. You totally ignored my code in my answer, and did it your own (wrong) way. Why?

http://www.mathworks.com/matlabcentral/answers/13205#answer_18099

[wisam kh]

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