How do you find the centre of an irregular shape?

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David Dijemeni
David Dijemeni on 4 Mar 2012
I am working on irregular shapes in an MRI scan. I would love to know the centre of different detected region in the image?
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Daniel Shub
Daniel Shub on 4 Mar 2012
As it stands now, this isn't a MATLAB question. What formula are you trying to implement and what problems are you having?
Jan
Jan on 4 Mar 2012
How do you define "center"? It can be the center of mass (then the center is the mean of the coordinates, if the object has the same density in each point). Or it could be the mean of the coordinates of the border. Or the point with the minimal sum of distances to all points of the area measured along paths inside the area (interesting for concave objects).

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Answers (1)

Image Analyst
Image Analyst on 4 Mar 2012
Segment your region so that you have a binary image, then run regionprops and ask for 'Centroid' or 'WeightedCentroid.' Your next step: run my BlobsDemo for an example/tutorial: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

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