How can I smooth a 2D boundary ?

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Sleh Eddine Brika 2016-10-25

评论： Image Analyst 2019-5-29

Hello, I have a N*2 matrix of x,y coordinates. I need to smooth the boundary. I tried with interp2 but I didn't get something nice.

Image Analyst 2016-10-25

Lots of ways. One way is to use splines:

Another way is to use a Savitzky-Golay filter.

I'm attaching demos for each of these methods.

Thiago Motta 2019-5-29

That would be regionProps

Image Analyst 2019-5-29

mask = poly2mask(x, y, rows, columns);
props = regionprops(mask, 'Area', 'Perimeter');

props is a structure or structure array where each structure will have an Area field, and a Perimeter field.

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