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What does the parameter mSquareSize means when we are working with asymmetrical circle grid?

asked 2014-11-08 10:07:52 -0500

Hello guys,

I am calibrating my mobile camera using the packs that I downloaded from the OpenCV samples. The script runs fine in my Android. However, the result doesn't make sense. Thus, I started wondering if I am using the correct parameter for mSquareSize.

Thats the first time I am working with asymmetrical circle grid and I am not quite sure about what would be the mSquareSize in a pattern like this (

Is it the diameter for each circle? Is it the distance to the closest circle? Would be great if someone could answer it for me or indicate where I can find this information.

Thank you very much.

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answered 2014-11-08 10:21:16 -0500

It's twice the distance between two circles in a row (or a column). In your image, it would be a tenth of the distance of the centers of the two outmost circles in the top row.

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There is a book, a document who explain this? i need it to write in my thesis :)

Giancola gravatar imageGiancola ( 2015-05-20 09:36:00 -0500 )edit

answered 2015-07-13 05:28:53 -0500

Giancola gravatar image

I tested that the correct value of square size is the half of distance between the circles in asymmetric circle grid while in symmetric circle grid is the distance.

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Asked: 2014-11-08 10:07:52 -0500

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Last updated: Jul 13 '15