Single-Shot Structured Light Sensor for 3D Dense and Dynamic Reconstruction

Single-Shot Structured Light Sensor for 3D Dense and Dynamic Reconstruction

Blog Article

Structured light (SL) has a trade-off between acquisition time and spatial resolution.Temporally coded SL can produce a 3D reconstruction with high density, yet it is not applicable to dynamic reconstruction.On the contrary, spatially coded SL works with a single shot, but equi-jec 6 it can only achieve sparse reconstruction.This paper aims to achieve accurate 3D dense and dynamic reconstruction at the same time.A speckle-based SL sensor is presented, which consists of two cameras and a diffractive optical element (DOE) projector.

The two cameras record images synchronously.First, a speckle pattern was elaborately designed and projected.Second, a high-accuracy calibration method was proposed to calibrate the system; meanwhile, the stereo images were accurately aligned by developing an optimized epipolar rectification algorithm.Then, an improved semi-global matching (SGM) algorithm was proposed to improve the correctness of the stereo matching, through which a high-quality depth map was achieved.Finally, dense point clouds could be recovered from the depth map.

The DOE projector was designed with a size of 8 mm × 8 mm.The baseline between stereo cameras was controlled to be below 50 mm.Experimental results validated the effectiveness of the proposed algorithm.Compared with some other single-shot pet calming peanut butter 3D systems, our system displayed a better performance.At close range, such as 0.

4 m, our system could achieve submillimeter accuracy.