A GPS-based Camera Calibration Method

doi:10.3969/j.issn.1000-1093.2016.12.016

Abstract

Abstract: The calibration templates have been widely used for camera calibration. The calibration templates could not cover a large field of view at a long distance due to its limitation. The method could not realize precise calibration. Combining the high-precision coordinate information access technology with GPS RTK mode, a GPS-based camera calibration method is proposed. In the proposed method, the coordinate information of GPS centroid in WGS-84 coordinates is obtained under the GPS RTK mode. The coordinate system transformation method is used to transform WGS-84 coordinates to system world coordinates. The images of GPS at different positions are taken by the camera under calibration, and Harris corner detection algorithm is used to get the corresponding image coordinates. The projection matrix is calculated according to the camera model, and the camera calibration is realized. Experimental results show that the proposed method can be used to obtain omnidirectional spatial coordinate information with high precision. Compared with traditional camera calibration methods, the calibrated RMS error of the proposed method is only 0.125 36.

Key words: optical engineering, computer vision, camera calibration, GPS navigation coordinate system, coordinate system transformation

CLC Number:

TP391.41

KONG Xiao-fang, CHEN Qian, GU Guo-hua, QIAN Wei-xian, REN Kan, WANG Jia-jie. A GPS-based Camera Calibration Method[J]. Acta Armamentarii, 2016, 37(12): 2301-2307.

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