Three-Dimensional Shape Information Acquisition Using Binocular Stereo Vision for Reflective Steel Plate

Three-dimensional (3-D) shape information acquisition for reflective steel plate is a very difficult challenge. In this work, a measurement framework based on three-step-phase-shifting and binocular stereo vision is proposed to obtain 3D shape measurement for reflective steel plate. In the proposed measurement framework, three-step-phase-shifting method is adopted to obtain the phase. Then, 3D points can be obtained by binocular stereo vision method. To verify the proposed measurement framework, a 3D measurement hardware system is developed, which consists of DLP Lightcrafter 4500 and two USB cameras. For reflective steel plate sample object, experimental results confirmed that the proposed framework could be applied to obtain 3D shape information of the reflective steel plate.