ABSTRACT
Systemcalibration,whichusually involves complicated and time-consuming procedures, is crucial for any 3D imaging system. This chapter presents two extensively used DFP calibration approaches: the simple reference-plane-based approximationmethod and the accurate geometric calibration method. The original geometric calibration concept to be presented in this chapter was originally developed by Zhang and Huang [47] and was generalized by Li et al. [137]. The key concept of the geometric calibration method is to enable the projector “capture” images like a camera, thus making the calibration of a projector the same as that of a camera. With this new concept, the calibration of structured light systems becomes essentially the same as the calibration of traditional stereo-vision systems, which is well established. The calibration method is fast, robust, and accurate. This chapter describes the principle of both calibration methods and shows some experimental results to illustrate the calibration ideas.
