How to detect different basic shapes and display its geometrical features by capturing an image from webcam?

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Amit Saha on 12 Mar 2015

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https://au.mathworks.com/matlabcentral/answers/182737-how-to-detect-different-basic-shapes-and-display-its-geometrical-features-by-capturing-an-image-from

Edited: Amit Saha on 18 Mar 2015

P.S : Processing the images (containing simple geometrical structures like circle, rectangle, ring & triangle) in MATLAB and display its features.

Complete over view of the setup: A frame upon which a web cam will be placed along with lighting source, which will be capturing the objects that are being placed in front of it & this is connected to a laptop through USB. From laptop with the help of MATLAB software I should be able to control the camera & what ever the images are being captured, MATLAB should be able to process it and display its geometrical features.

The final result should be: 1. For circle/ring, it should detect the boundary, display its diameter or radius and also locate its center point. 2. For Rectangle/ square, its edge length and its centroid 3. For Triangle, edge lengths, height and its centroid point.