A calibration technology for multi-camera system with various focal lengths

Ruihua Yang; Jin Zhang; Huaxia Deng; Liandong Yu

doi:10.1117/12.2218044

26 January 2016 A calibration technology for multi-camera system with various focal lengths

Ruihua Yang, Jin Zhang, Huaxia Deng, Liandong Yu

Author Affiliations +

Proceedings Volume 9903, Seventh International Symposium on Precision Mechanical Measurements; 99032S (2016) https://doi.org/10.1117/12.2218044
Event: Seventh International Symposium on Precision Mechanical Measurements, 2015, Xia'men, China

Abstract

Calibration is the basis of three-dimensional (3D) reconstruction for machine vision technology. Nowadays, the most widely used calibration method among computer vision is the technique for binocular stereo measurement. However, binocular stereo vision has limited view field which is difficult to measure large-scale mechanical components synchronously. Thus, enlarging the view field is urgent in need for the large scale measurement. With the application of multi-camera system, the calibration for cameras with different focal lengths is required. In this paper, a method aiming at calibration problems for multi-camera system of different focal lengths is proposed. An imaging model for multi-camera system with various focal lengths is analyzed. The Harris corner detector is applied to determine the relationship between signal camera and checkerboard. Finally, the external parameters of different cameras can be obtained by the link with the checkerboard. The calibration results indicate that the calculation method used in this work can calibrate multi-camera with various focal lengths.

Citation Download Citation

Ruihua Yang, Ruihua Yang, Jin Zhang, Jin Zhang, Huaxia Deng, Huaxia Deng, Liandong Yu, Liandong Yu, "A calibration technology for multi-camera system with various focal lengths", Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 99032S (26 January 2016); doi: 10.1117/12.2218044; https://doi.org/10.1117/12.2218044

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