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autofocus on or off for cam calibration and ArUco pose estimation

asked 2019-03-13 07:51:13 -0500

Maksat gravatar image

Hi, have a DSLR Camera with fixed lens I want to calibrate (camera matrix, distortion coefficients) using chessboard. question is do I have to set up the manual focus to infinity for the calibrtion or leave autofocus on? Same question when pose estimating of Aruco Markers.
Appreciate your replies

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answered 2019-03-13 08:21:39 -0500

berak gravatar image

updated 2019-03-13 08:25:30 -0500

you have to disable the autofocus before calibrating it, and leave it OFF forever.

also, never touch the manual focus then, else your calibration is invalid !

(wether or not you want to set the manual focus to infinity, depends on the distance / size of your calibration chessboard (and the expected distance to your aruco markers later). infinity will be blurry with short distance / small boards)

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Thank you for clear answer

Maksat gravatar imageMaksat ( 2019-03-13 08:51:56 -0500 )edit
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Asked: 2019-03-13 07:51:13 -0500

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Last updated: Mar 13 '19