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

Fringe projection profilometry is a mature 3D measurement technique, however it is still difficult to measure high dynamic range objects in real-time. In this paper, we present a method of using digital micro-mirror devices to dynamic range enhancement of fringe projection profilometry. After applying this method, we can obtain two fringe images with different exposures in one projection period. These two fringes will be combined to solve the high dynamic range problem. Furthermore, we also build a multi-view system to realize real-time measuring stably because the multi-view system can retrieve the absolute phase without projecting additional fringe patterns. Experiments demonstrate that the proposed method can realize real-time three-dimensional measurement at 28 frames per second and the dynamic range of fringe projection profilometry system is increased by 2 times.