MATLAB: What features I should extract for margin

Image Processing Toolboxmargin features

I have two margins of two objects, one is regular and one is irregular. I would like to classify regular or irregular margin. What features I should extract for classification?

Thanks

Best Answer

I would use Solidity, as returned by regionprops(). It's the ratio of the area to the convex hull of the blob. You can also use the circularity which is perimeter^2/(4*pi*area) or the inverse of that.

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chulls = bwconvhull(seg_image_bw);
measurements = regionprops(chulls, 'Area', 'BoundingBox');
% Compute the areas of each convex hull:
allAreas = [measurements.Area];
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boundingBoxes = [measurements .BoundingBox];
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Use regionprops() to calculate the Eccentricity. Eccentricity should be nearly 0 for a circle.

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