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How to calibrate a camera of bird's eye view

asked 2013-07-12 10:20:00 -0500

simon111 gravatar image

I'm calibrating a camera of bird's eye view, as you know, the distortion is very heavy.

After I read this tutorial

calibrating undistorting with opencv in c

I try to use a chess board to some experiences.

could you tell the whether chess board method is suit for a camera of bird's eye view?

think you in advance

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answered 2013-07-14 10:42:27 -0500

Daniil Osokin gravatar image

updated 2013-07-14 10:46:12 -0500

Hi, Simon!

Yes, you can try chessboard pattern to calibrate camera with bird's-eye view, but asymmetric circles grid pattern usually provides less average re-projection error. Look through the "Camera calibration With OpenCV" tutorial for more experience.

To achieve good results, pass


into flags combination in calibrateCamera() function and play with fixing or leaving free radial distortion coefficients (use appropriate flag combination). I had reliable results with fixed k5, k6 coefficients and leaved free principal point.

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Thank you, I will try

simon111 gravatar imagesimon111 ( 2013-07-15 09:43:10 -0500 )edit

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Asked: 2013-07-12 10:20:00 -0500

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Last updated: Jul 14 '13