Member Avatar for intelharsh

I am trying to semi-circles and full circles in an image.

This is the process I'm following :
Process image (including Canny edge detection)
Find contours and draw them on an empty image, so that I can eliminate unwanted components. (The processed image is exactly what I want.)
Detect circles using HoughCircles. And this is what I get.

I accept or reject a circle based on it's size. So the result is not acceptable. Also I have a long list of "acceptable" circles so I need some allowance in the HoughCircle params. As for the full circles, it's easy - I can simply find the "roundness" of the contour. The problem is semi-circles!

semicircle.png 103.69 KB eAvng.png 3.96 KB
Edited by intelharsh
  • 3 Contributors
  • 2 Replies
  • 849 Views
  • 3 Days Discussion Span
  • Latest Post Latest Post by Moschops
Member Avatar for richieking

Show some code then.

Member Avatar for Moschops

Are you struggling to come up with the algorithm to identify a semi-circle, given a set of contours, or do you have your algorithm and you're struggling to code it?

Edited by Moschops
Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.