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calibration images?

asked 2017-01-04 05:19:47 -0600

Fnoop gravatar image

Where are the calibration images referenced here? http://docs.opencv.org/3.2.0/d7/d21/t...

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which images, exactly ?

berak gravatar imageberak ( 2017-01-04 05:35:20 -0600 )edit

Sorry, should have said patterns:

Supported patterns:

Black-white chessboard
Asymmetrical circle pattern
Dual asymmetrical circle pattern
chAruco (chessboard with Aruco markers)
Fnoop gravatar imageFnoop ( 2017-01-04 05:36:49 -0600 )edit

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answered 2017-01-04 05:44:29 -0600

berak gravatar image

the chessboard/circles patterns are generated from this tool, also, there are ready made chessboard , acircle and charuco images.

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Thanks, that would be useful info on the calibration page. The charuco image is heavily pixelated/compressed and isn't the recommended one for calibration (aruco signs on the corners).

Fnoop gravatar imageFnoop ( 2017-01-04 05:55:11 -0600 )edit

yea, true, the charuco one is probably too lo-fi to be used.

i guess, you'll have to go to the arucoo module, load a board, and save it in better quality.

berak gravatar imageberak ( 2017-01-04 06:03:34 -0600 )edit
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OK I've compiled aruco/create_board_charuco and created a board as similar as possible to the one shown in the aruco calibration doc: ./create_charuco -w=8 -h=5 --ml=50 --sl=80 -d=14 ~/charuco-pattern.png No idea if this will work, will update with results.

Fnoop gravatar imageFnoop ( 2017-01-04 07:11:21 -0600 )edit

good to see, you're on your way - please, do so !

berak gravatar imageberak ( 2017-01-04 07:48:37 -0600 )edit
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and might I suggest that you add the info to the calibration page as a pull request when you are finished?

StevenPuttemans gravatar imageStevenPuttemans ( 2017-01-05 03:16:11 -0600 )edit
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@StevenPuttemans - sure will do, if I ever get anywhere. After eventually finding the interactive installer now I'm getting the aruco symbols recognised but every frame rejected.

Fnoop gravatar imageFnoop ( 2017-01-05 11:53:23 -0600 )edit
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@Fnoop - some hint, how to output a better charuco board image, would already be helpful ;)

berak gravatar imageberak ( 2017-01-05 11:56:00 -0600 )edit

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Asked: 2017-01-04 05:19:47 -0600

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Last updated: Jan 04 '17