MATLAB: For the ‘regionprops’ function

regionprops

Hello, everyone, Are the 'Centroid' attributes obtained by the 'regionprops' function the origins of the ellipses? Or how can I get the origins of the ellipses? Thank you very much.

Best Answer

Ellipses (actual ones) are always symmetric along both the major and minor axes, so they have a well defined origin which is at their centroid.

If you have partial ellipses instead of full ellipses then the centroid of the region will not generally match the origin of the ellipse.

Related Solutions

MATLAB: Regionprops

Try this for a start:

img = zeros(5,5);
img(2:4, 2:4) = 1;
props = regionprops(img, 'PixelList');
disp(img);
disp(props.PixelList);

You can change the pattern of ones in img until you're clear about how the result is structured. Another simple but informative example:

img = zeros(5,5);
img(2,2) = 1;
img(4,4) = 2;
props = regionprops(img, 'PixelList');
disp(props(1).PixelList);
disp(props(2).PixelList);

MATLAB: Convert STL file to something I can use ‘regionprops’ function

I don't use STL files. Somehow you need to convert the STL file to a binary image. Perhaps you can use poly2mask() to do that.

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Related Solutions

MATLAB: Regionprops

MATLAB: Convert STL file to something I can use ‘regionprops’ function

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