Acta Optica Sinica, Volume. 41, Issue 11, 1115001(2021)
Calibration Method for Trinocular Stereovision System Comprising Projector and Dual Cameras
After the parameter calibration of a projector, it can be considered another camera and combined with a binocular system to form a trinocular stereo vision system. In contrast to the traditional calibration method using high-precision plane targets, the proposed method only needs a simple and unmarked white paper target to obtain the world coordinates of the characteristic points provided by a binocular system. The linear model and distortion correction model containing the distortion coefficient of a thin prism are used to complete the preliminary parameter calibration of a projector, and an improved beam adjustment method is used to estimate the global optimal parameters of the projector and a dual camera. Results of calibration verification experiments show that the proposed improved beam-adjustment method can achieve parameter optimization. A measurement comparison experiment on a standard plane showed that the resulting trinocular stereo vision system could enhance measurement accuracy.
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Duo Zhou, Peng Wang, Changku Sun, Meihan Dong, Luhua Fu. Calibration Method for Trinocular Stereovision System Comprising Projector and Dual Cameras[J]. Acta Optica Sinica, 2021, 41(11): 1115001
Category: Machine Vision
Received: Sep. 14, 2020
Accepted: Jan. 6, 2021
Published Online: Jun. 7, 2021
The Author Email: Wang Peng (wang_peng@tju.edu.cn)