How to use these markers:
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These matrix-code markers are a 3x3 format without error detection or correction, allowing up to 64 different markers to be identified.

To enable the use of these markers in your ARToolKit program, add these lines to your setup code:

arSetPatternDetectionMode(arHandle, AR_MATRIX_CODE_DETECTION);
arSetMatrixCodeType(arHandle, AR_MATRIX_CODE_3x3);

More information on use of matrix code-mode can be found here:
https://github.com/artoolkitx/artoolkitx/wiki
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