You can download a PDF version of the circle grid calibration pattern that our SceneScan stereo vision sensor 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.
The siemens star enables the exact focusing of camera lenses. That is why we print it on the back of our calibration boards. In order to make the camera focusing easier for you as well, you can download our siemens star here.
