A SELF-PROJECTED STRUCTURED LIGHT SYSTEM FOR FAST THREE-DIMENSIONAL SHAPE INSPECTION

作者：Gao Hao^*; Aoyama Tadayoshi; Takaki Takeshi; Ishii Idaku

来源：International Journal of Robotics and Automation, 2015, 30(5): 458-470.

DOI：10.2316/Journal.206.2015.5.206-4272

• Structured light
• high-speed vision
• DLP projector
• real-time 3D scanner
• GPU
• shape inspection

In this paper, we propose a self-projected structured light method that can reduce the number of projections for fast three-dimensional (3D) shape inspection even when there are large height differences in the measured 3D scene. In our method, multiple curved-stripe patterns generated by a reference 3D shape are projected onto the measured 3D scene, and 3D shapes can be obtained by processing multiple straight-stripe-like patterns projected in the camera view. Compared with the straight-stripe projections in most structured light methods, our self-projected structured light method can reduce the number of curved-stripe projections by facilitating fast processing and accurate acquisition of 3D shapes when a reference 3D shape is provided prior. We implemented our proposed method on a GPU-based high-frame-rate (HFR) structured light system that can obtain and process 512 x 512 depth images in real time at 500 fps, synchronized with an HFR projector. The effectiveness of our self-projected light system was demonstrated by means of several real-time experimental results measured at 500 fps.

• 出版日期2015