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How to overlay the contour map on its corresponding original image?

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Zong Shenyan
Zong Shenyan 2020-4-22
回答： Ameer Hamza 2020-4-22
Hi All,
I knew the function 'contour' could plot contour map for a 2D matrix. I have used it and successfully shown the contour map of that matrix as I expect. However, I want to show the contour map and the original image at one coordinate, then I could see how the contour lines as the threshold segment the original map. Could someone tell me how to finish this work?
Best regards,
Shenyan.

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Ameer Hamza
Ameer Hamza 2020-4-22
See this example
im = im2double(imread('pears.png'));
im_gray = rgb2gray(im);
figure();
ax = axes();
I = imshow(im, 'Parent', ax);
hold on
c = contour(ax, im_gray);

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