Shadow removal method for phase-shifting profilometry

Authors

Lei Lu, University of WollongongFollow
Jiangtao Xi, University of WollongongFollow
Yanguang Yu, University of WollongongFollow
Qinghua Guo, University of WollongongFollow
Yongkai Yin, University of WollongongFollow
Limei Song, Tianjin Polytechnic University

RIS ID

101524

Publication Details

L. Lu, J. Xi, Y. Yu, Q. Guo, Y. Yin & L. Song, "Shadow removal method for phase-shifting profilometry," Applied Optics, vol. 54, (19) pp. 6059-6064, 2015.

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.