How do I use and create, a polygon based linear sliding window for geometric "feature" and "Object" shape analysis
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Im working on trying to characterize shape based features, with low matrix dimensions, basically Blobs 45 x 35, as an example. What is the best way to do this? Should I use a sliding Window? The blobs share a certain similarity in shape and are also unique at the same time.
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Image Analyst
on 10 Aug 2013
You need to look at morphometrics: http://en.wikipedia.org/wiki/Morphometrics. A sliding window probably won't do it, though it might be one step in the process. Basically you first need to detect the blobs, then you need to call regionprops() or bwboundaries() and analyze the shape of each blob to find similarities.
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Adam M
on 13 Aug 2013
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Image Analyst
on 14 Aug 2013
You could look at the circularity (=perimeter^2 / (4*pi*area)), or you could look at the Euler number (number of holes) or the aspect ratio or Fourier descriptors or whatever it takes to get your objects. Perhaps you will show us the objects that you need to classify.
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