Extract multiple radius from an image

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SenseOf
SenseOf 2012-4-9
Hi, I have a grayscale image of quasi-circular objects. I have to compute their radius. I can extract these objects applying a threshold on the image. So now I have a b/w image with my quasi circular objects. In some way I found the centre of this objects. Now I want to compute with a for cycle their radius, extracting from the b/w image the columns corresponding to x-coordinates of the centers and calculating the length of the sequence of the "1" in those columns. How can I do this? Thanks

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Ashish Uthama
Ashish Uthama 2012-4-12
If you have the newer version with the Image Processing Toolbox, the imfindcircles might be useful (depending on the 'circularity' of your objects).
You could also try using the regionprops function in the Image Processing Toolbox to get characteristics of each object. You could then use the 'Area' and 'Perimeter' properties to deduce a rough estimate of the radius.

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