中国物理B ›› 2014, Vol. 23 ›› Issue (4): 44212-044212.doi: 10.1088/1674-1056/23/4/044212
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
张万祯a, 陈浙泊a b, 夏彬峰a, 林斌a, 曹向群a
Zhang Wan-Zhen (张万祯)a, Chen Zhe-Bo (陈浙泊)a b, Xia Bin-Feng (夏彬峰)a, Lin Bin (林斌)a, Cao Xiang-Qun (曹向群)a
摘要: Digital structured light (SL) profilometry is increasingly used in three-dimensional (3D) measurement technology. However, the nonlinearity of the off-the-shelf projectors and cameras seriously reduces the measurement accuracy. In this paper, first, we review the nonlinear effects of the projector-camera system in the phase-shifting structured light depth measurement method. We show that high order harmonic wave components lead to phase error in the phase-shifting method. Then a practical method based on frequency domain filtering is proposed for nonlinear error reduction. By using this method, the nonlinear calibration of the SL system is not required. Moreover, both the nonlinear effects of the projector and the camera can be effectively reduced. The simulations and experiments have verified our nonlinear correction method.
中图分类号: (Imaging and optical processing)