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How to Measure the Distance Between the Red crosses?

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I am trying to do shape identification using the harris corner detection method. I want to detect 2 corners of a shape and use the distance between those corners to identify the shape (square, triangle, circle, or star). How do I measure the distance between the red crosses in the picture below? How would I then classify that distance as a triangle?

Answers (1)

Abhisek Pradhan
Abhisek Pradhan on 10 Nov 2020
imdistline can be used to find the distance between two points in an image by interactively setting the positions. For detecting whether the image is a triangle or not I would suggest referring the example in below-mentioned links. Or we may need to get the length of all three sides to conclude it to be a triangle.

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