Contour Center

Given that [C,h]=contour(...) returns ellipsoidal contours, is it possible to find the center of these contours?

Answer 1

[Dayong]

What center would you like to find? For an arbitrary shape, the mass center( actually, I don't know the English word of this center in physics) is available. A shape can be treated as an plain object with uniform density. So the position of mass center(point) is the average value of coordinates of all the points.

Answer 2

[Image Analyst]

I don't why you say it finds ellipsoidal contours. Why do you think they have to be ellipses? You don't even need contour to find centroids. Just threshold and pass into regionprops to get centroids and weighted centroids (weighted by gray level):

measurements = regionprops(grayImage>threshold, 'Centroid', 'WeightedCentroid');

[Image Analyst]

Oh, I just realized how old this post is. Not sure why everyone, including me, missed it 10 months ago.