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findChessBoardCorners work on some images but fail in others

asked 2012-08-19 09:18:35 -0500

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Hi I have a trouble with the function findChessBoardCorners in some images work OK, but in others images it's fail. I don't know where is the problem, the images are very similar.

For example:

-- Work OK: image description

-- Don't Work: image description

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For me it looks that they are quite different. Did you observe the significant size difference between the pattern sizes?

sammy gravatar imagesammy ( 2012-08-20 02:35:31 -0500 )edit

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answered 2012-08-20 00:42:54 -0500

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I think findChessBoardCorners function is dedicated for camera calibration and not suitable for finding cross corners on cylindrical chess pattern.

In the document description it says:

Note: The function requires white space (like a square-thick border, the wider the better) around the board to make the detection more robust in various environments. Otherwise, if there is no border and the background is dark, the outer black squares cannot be segmented properly and so the square grouping and ordering algorithm fails.

Maybe you need to think about another method for your problem.

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answered 2014-03-21 06:42:04 -0500

chandran gravatar image

hai all,

i am new to Opencv. Currently i am using native camera to capture forms. now i want to detect a barcode exists in form image or not?. help will be greatly appreciated.

Regards, chandran.G

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cindy313 gravatar imagecindy313 ( 2014-05-07 22:16:55 -0500 )edit
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Asked: 2012-08-19 09:18:35 -0500

Seen: 1,917 times

Last updated: Mar 21 '14