Calibration of a phase-based 3D imaging system based on uneven fringe projection technique

Zonghua Zhang; Haiyan Ma; Hui Feng; Zhao Jing; Tong Guo; Sixiang Zhang

doi:10.1117/12.868768

11 November 2010 Calibration of a phase-based 3D imaging system based on uneven fringe projection technique

Zonghua Zhang, Haiyan Ma, Hui Feng, Zhao Jing, Tong Guo, Sixiang Zhang

Proceedings Volume 7855, Optical Metrology and Inspection for Industrial Applications; 78550U (2010) https://doi.org/10.1117/12.868768
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

We present a simple calibration method of the phase-based 3D imaging systems based on an uneven fringe projection method. The relationship between absolute phase and depth is linear and independent of pixel position, which can be represented by a polynomial function. By designing a plate having discrete markers with known separate distance in between on the plate surface and projecting uneven fringe pattern onto it, one can calculate the absolute phase of the centre on each marker. The 3D coordinates of all the markers can be obtained by a general CCD camera calibration method. So coefficient set of the polynomial function are determined by using the obtained absolute phase and depth of all the markers. The proposed method was applied to calibrate a phase-based 3D imaging system. Experimental results and performance evaluation show that the proposed calibration method can easily build up the accurate relationship between absolute phase and depth information data.

Citation Download Citation

Zonghua Zhang, Haiyan Ma, Hui Feng, Zhao Jing, Tong Guo, and Sixiang Zhang "Calibration of a phase-based 3D imaging system based on uneven fringe projection technique", Proc. SPIE 7855, Optical Metrology and Inspection for Industrial Applications, 78550U (11 November 2010); https://doi.org/10.1117/12.868768

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