Wrong Charuco boards (not matching with OpenCV)

[rsnitsch]

The 9x6 charuco board generated by MarkerPrinter is different from what OpenCV expects. In particular, the top-left square is white, while OpenCV expects a black square first. This means that OpenCV will be unable to detect the Charuco board.

Full description, sample code and workaround (for the time being) can be found here: https://github.com/rsnitsch/opencv-MarkerPrinter-wrong-charuco-board