Circle Grid Camera Calibration PatternsYou can download a PDF version of the circle grid calibration pattern that the SP1 uses for camera calibration. This pattern is compatible to the OpenCV asymmetric circle grid, and can thus also be used for other purposes.
When printing the pattern, please ensure that your PDF viewer or printer driver do not scale
the document. Otherwise you will not be able to receive accurate metric measurements through
stereo vision. You can verify that your printed pattern has the correct scaling, by measuring
the reference line at the top of each document.