how to find different features of objects
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in this binary image there are some objects in x-y coordinate, I want to find the biggest object and its centroid (x,y). how can I do that?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/150091/image.jpeg)
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Image Analyst
on 14 May 2015
See my Image Segmentation Tutorial: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862 It finds the centroids of a bunch of circles.
Then, see my attached demo that will find the largest or smallest N blobs in a binary image.
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Image Analyst
on 14 May 2015
There are several ways. For example, you can first call my function that returns only the largest blob. Then you can call bwlabel() and regionprops().
%----------------------------------------------------------
% Extract the largest area using our custom function ExtractNLargestBlobs().
biggestBlob = ExtractNLargestBlobs(binaryImage, numberToExtract);
%---------------------------------------------------------
labeledImage = bwlabel(biggestBlob);
measurements = regionprops(labeledImage, 'Centroid');
centroid = measurements(1).Centroid;
I think maybe you looked only at the ExtractNLargestBlobs demo and did not look at the demo in my File Exchange - they are different. I attach both here.
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