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
2015 年 5 月 14 日
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
2015 年 5 月 14 日
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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