How to detect Triange and Hexagone?

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Anybody please tell the algorithm to detect the Triangle and Hexagone shapes in pictures

Accepted Answer

Image Analyst
Image Analyst on 31 Dec 2013
Depends on what the picture looks like. If it's just a picture of a random snapshot of a city scene, then it could be difficult. If you already have the binary image, it's a lot easier. Maybe try corner() in the Image Processing Toolbox, or, depending on how perfect the shapes are you could call regionprops() and look at the Perimeter^2/(4*pi*area) ratio, which will be different for the two shapes.
  6 Comments
saravanakumar D
saravanakumar D on 31 Dec 2013
Corner() function didn't work for me. It just returns and 200 points on the boundries of the Triangle. It just show the points on corner.
Image Analyst
Image Analyst on 31 Dec 2013
Alright, so try regionprops.

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