Abstract:
Structured light measurement is widely used in various areas due to non-contact, high speed, high measurement accuracy and low cost. The measurement accuracy of structured light measurement system depends on the calibration accuracy. The existing calibration methods were reviewed including the photogrammetry based on matrix transformation, geometry-based triangulation, and polynomial method. Photogrammetry can be further divided into inverse camera, pseudo-camera, and light-stripe plane. All the calibration methods were compared in the view of error propagation, dependence on projector calibration, precise auxiliary calibration gauge, and operation complexity. It is pointed out that the trend of calibration method is from laboratory to factory techniques, which require simple calibration device, convenient calibration process, fast calibration and high calibration precision.