Calibration for Precise Transformation from Pixel to Real World Coordinates The Calibration and Rectification license provides you with a pylon vTool to quickly and easily calibrate cameras for distortion correction and real world coordinate transformation. Create a precise transformation model that converts pixel coordinates of object positions, angles, or dimensions to real-world values.pylon vTools are part of Basler's pylon Software Suite. Licenses for pylon vTools can be protected by hardware dongles. If you want to run multiple systems with pylon vTools at the same time, you will need one dongle for each system.