Calibration of "Flying Triangulation"

In (Ettl et al., Appl Opt 51 (2012) 281-289) we introduced the optical 3D sensor, "Flying Triangulation". A hand-guided, easy, motion-robust measurement of complex objects is possible. No external tracking is necessary, due to sophisticated registration algorithms. To get real metric 3D data with best possible accuracy, a calibration of the sensor is needed. The special feature is that we have to define internal and external parameters of the camera and as well of the projector. Currently, we apply a model-free calibration method, which is time-consuming and which needs much user interaction. The basic idea of our new approach is to use a calibration pattern, that can be either self-luminous or used as projection screen. This way, we are able to apply a calibration that is much more user friendly, more accurate, and reliable.