High dynamic range and real-time 3D measurement based on a multi-view system

摘要

Fringe projection profilometry is a mature 3D measurement technique, however it is still dificult to measurehigh dynamic range objects in real-time. In this paper, we present a method of using digital micro-mirrordevices to dynamic range enhancement of fringe projection prolometry. After applying this method, we canobtain two fringe images with difierent exposures in one projection period. These two fringes will be combinedto solve the high dynamic range problem. Furthermore, we also build a multi-view system to realize real-timemeasuring stably because the multi-view system can retrieve the absolute phase without projecting additionalfringe patterns. Experiments demonstrate that the proposed method can realize real-time three-dimensionalmeasurement at 28 frames per second and the dynamic range of fringe projection profilometry system is increasedby 2 times.