A projector calibration method for fringe projection system

Li Zhang; Yongjian Zhu

doi:10.1117/12.2648685

14 October 2022 A projector calibration method for fringe projection system

Li Zhang, Yongjian Zhu

Proceedings Volume 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022); 123431N (2022) https://doi.org/10.1117/12.2648685
Event: 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 2022, Qingdao, China

Abstract

Accurate calibration of image acquisition and projection device in fringe projection measurement system is the basis of system work, and the calibration accuracy of the parameters directly affects the measurement accuracy of the system. An improved projector calibration method is proposed. Using a high-precision circular calibration plate, the camera is calibrated by Zhang Zhengyou's calibration method and nonlinear optimization; using the vertical and horizontal two sets of grating images projected by the projector, the corresponding relationship between them and the camera image is established, and then the center of the mark point in the projection is obtained. Then use the camera model with radial distortion to calibrate the projector; analyze the phase error when the projector is calibrated, and use the improved multifrequency fringe phase shift method to reduce the error; finally, through the calibration and the three-dimensional measurement experiment verifies the method in this paper. The experimental results show that the calibration method in this paper is simple in operation, high in precision and wide in application.

Citation Download Citation

Li Zhang and Yongjian Zhu "A projector calibration method for fringe projection system", Proc. SPIE 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 123431N (14 October 2022); https://doi.org/10.1117/12.2648685

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KEYWORDS

Calibration

Projection systems

Cameras

Phase shifts

Distortion

3D modeling

Image processing

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