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How to detect the Hexagon in imageprocessing?

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I don't know how to find the hexagon shape in image. please anyone help

Accepted Answer

Image Analyst
Image Analyst on 27 Dec 2013
Get the boundary of the object with bwboundaries(). Then find out if there are 6 kinks in the boundaries with the FAQ. Then see if the lengths of the sides are similar enough to be considered a hexagon rather than just some arbitrary 6-sided polygon. Also make sure it's convex by checking that the solidity is really close to 1.
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Image Analyst
Image Analyst on 31 Dec 2013
From the code the FAQ directs you to, it would be length(xStar). The distance is just the simple Pythagorean theorem, so use diff() and sqrt().

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