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How do i cut the unnecessary portion from image other than edge of canal?

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Jainee Solanki
Jainee Solanki 2017-11-23
评论： Image Analyst 2017-11-25
n=imread('Canal_Images\a7.jpeg'); imshow(n); title('original');
img=rgb2gray(n); imshow(img);
b=edge(img,'canny');
imshow(b); title('canny');
After this, I need to cut the remaining portion other than the edge of the canal. So I need to cut the image to focus only on edge.How can I do it now?

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KSSV
KSSV 2017-11-23
Read imcrop .

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