How to find Concavity or Convexity part in an Image?

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Sabarinathan Vadivelu on 11 Dec 2012

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Accepted Answer: Theo Walker

If this was my input Image, How to find that red dot position? Is there any procedures or algorithms??

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Theo Walker on 8 Jun 2013

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One easy way would be to dilate the image, then erode the image. Take the result, and subtract your original image from it.

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Image Analyst on 8 Jun 2013

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Use bwboundaries, then see the FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_find_.22kinks.22_in_a_curve.3F

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