How to find the best circular fit for an irregular shape and define an average radious for it. The Goal is to define a fix distance from the weighed center and extract the ave

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How to find the best circular fit for an irregular shape and define an average radious for it. The Goal is to define a fix distance on the radious e.g. (0.5 R) from the weighed center and extract the ave od data from those pixels.

Answers (2)

Abhiroop Rastogi
Abhiroop Rastogi on 14 Feb 2022
Hi Ali Hariri,
For fitting a best circular fit for the data you have you choose from the resources given
The first two give you a fit if you have the data in coordinates form and the third one utilizes the image data itself.

Matt J
Matt J on 14 Feb 2022
Edited: Matt J on 14 Feb 2022
You can use circularFit(), available at
Or, you can use regionprops,
reg=regionprops(BW,'WeightedCentroid','PixelList');
averageRadius=mean(vecnorm( reg.WeightedCentroid-reg.PixelList ,2,2));

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