How to get the x and y points of a contour?

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scorpio 09 2014-3-21

0
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https://ww2.mathworks.cn/matlabcentral/answers/122529-how-to-get-the-x-and-y-points-of-a-contour

评论： Image Analyst 2014-3-21

%this is the following code which creates a contour for the circle image %now i want the x and y points of that contour

I = imread('circle.jpg');
figure
imshow(I)
hold on;
mask = false(size(I));
mask(60:320,40:300) = true;
Display the initial contour on the original image in blue.
contour(mask,[0 0],'b');

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Answer 1

the cyclist 2014-3-21

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https://ww2.mathworks.cn/matlabcentral/answers/122529-how-to-get-the-x-and-y-points-of-a-contour#answer_129521

From the documentation for contour() ...

"[C,h] = contour(...) returns a contour matrix, C, that contains the data that defines the contour lines, and a handle, h, to a contourgroup object. The clabel function uses contour matrix C to label the contour lines. ContourMatrix is also a read-only contourgroup property that you can obtain from the returned handle."