Abstract

In a typical phase-shifting profilometry system for the three-dimensional (3D) shape measurement, shadows often exist in the captured images as the camera and projector probe the object from different directions. The shadow areas do not reflect the fringe patterns which will cause errors in the measurement results. This paper proposed a new method to remove the shadow areas from taking part in the 3D measurement. With the system calibrated and the object reconstructed, the 3D results are mapped on a point-by-point basis into the corresponding positions on the digital micro-mirror device (DMD) of the projector. A set of roles are presented to detect the shadow points based on their mapped positions on the DMD plane. Experimental results are presented to verify the effectiveness of the proposed method.

© 2015 Optical Society of America

Real-time microscopic phase-shifting profilometry

Sam Van der Jeught, Joris A. M. Soons, and Joris J. J. Dirckx
Appl. Opt. 54(15) 4953-4959 (2015)

Self-correction of projector nonlinearity in phase-shifting fringe projection profilometry

Fuxing Lü, Shuo Xing, and Hongwei Guo
Appl. Opt. 56(25) 7204-7216 (2017)

Phase-shifting profilometry combined with Gray-code patterns projection: unwrapping error removal by an adaptive median filter

Dongliang Zheng, Feipeng Da, Qian Kemao, and Hock Soon Seah
Opt. Express 25(5) 4700-4713 (2017)

Reconstruction method for fringe projection profilometry based on light beams

Xuexing Li, Zhijiang Zhang, and Chen Yang
Appl. Opt. 55(34) 9895-9906 (2016)

Telecentric 3D profilometry based on phase-shifting fringe projection

Dong Li, Chunyang Liu, and Jindong Tian
Opt. Express 22(26) 31826-31835 (2014)