Ask Your Question
1

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

edit retag flag offensive close merge delete

1 answer

Sort by ยป oldest newest most voted
1

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

CV_CALIB_RATIONAL_MODEL

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.

edit flag offensive delete link more

Comments

1

Thank you, I will try

simon111 gravatar imagesimon111 ( 2013-07-15 09:43:10 -0500 )edit
Login/Signup to Answer

Question Tools

Stats

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

Seen: 1,761 times

Last updated: Jul 14 '13