Camera Calibration: Why skew CirclesGrid Target? [closed]

asked 2014-01-31 03:05:10 -0500

Drclewis gravatar image

I understand why circles located with more sub-pixel precision than checkerboard grid intersections. However, when a circle is skewed the center of its elliptical projection is offset from the projection of the center of the circle in the image plane. Therefore, why does ros's calibration gui try to make sure the user presents sufficient skewed images? I'm not sure why one would want to skew a checkerboard either, but for a circles grid this seems wrong.

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Closed for the following reason question is off-topic or not relevant. Please see for more details. by tfoote
close date 2016-08-14 01:28:24.795661