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

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.

Answer 1

[Ameer Hamza]

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);