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Calibration using exterior surfaces (such as gaming dice)

The place for questions, problems, comments and tips regarding the camera calibration.

Calibration using exterior surfaces (such as gaming dice)

Postby Rick_Brade » Wed Jan 02, 2008 4:31 pm

In my opinion, one of the only weaknesses of DAVID is the need to fabricate a calibration corner. It can be time consuming to construct a pair of surfaces with a precise 90 degree angle.

Would it be possible to modify the code to calibrate on the exterior surfaces of a box instead? One advantage would be that it is easy to find or make cube shaped objects with a precise 90 degree angle. The best example I can think of would be using the outside of gaming dice because they already have dots on the sides, are inexpensive, and easy to find. Maybe a bigger object would be better, but I'm open to hearing suggestions.

What do you think?
dice.jpg (2.17 KiB) Viewed 2762 times
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Location: Dearborn Michigan USA

Postby MagWeb » Wed Jan 02, 2008 7:59 pm

Hi Rick,

it´s possible to calibrate DAVID on a convex outer corner using the normal calibpoints-pattern.

You only have to modify the calibpoints.dat file.
For first information read the discussion:

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