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How does detectCheckerboardPoints work?

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Jdeen
Jdeen on 28 Jul 2015
Commented: Image Analyst on 26 Sep 2019
Hi!
I am wondering how the function "detectCheckerboardPoints" works. What prerequisites are there for the image I? What algorithm is behind the function? E.g., does it rely on a harris corner detector? Does it explicitly look for quadrilaterals? Why doesn't it work for this image, for example?

Answers (1)

Image Analyst
Image Analyst on 28 Jul 2015
Probably because it's such a poor quality image. You might have to do some preprocessing first to get rid of the noise and posterization, and of course better image capture environment (lighting, geometry, etc.).
  4 Comments
Image Analyst
Image Analyst on 26 Sep 2019
Because if it's important enough for him, he might buy the toolbox. Why would I not refer him to an answer just because I personally don't have the toolbox that has a function I know would help him? Why should I withhold such potentially valuable and helpful information? (By the way, I have the toolbox now.)

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