Large size target measurement method based on distorted image of fish eye camera

Home > Archive>Volume 45, Issue 19, 2022 >161-166

Large size target measurement method based on distorted image of fish eye camera
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                        Lan YinghuaLan Yinghua
1 Shanxi Key Laboratory of Signal Capturing and Processing, North University of China, Taiyuan 030051, China 2 School of Information and Communication Engineering, North University of China, Taiyuan 030051, China
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Wang JianWang Jian
1 Shanxi Key Laboratory of Signal Capturing and Processing, North University of China, Taiyuan 030051, China 2 School of Information and Communication Engineering, North University of China, Taiyuan 030051, China
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Han YanHan Yan
1 Shanxi Key Laboratory of Signal Capturing and Processing, North University of China, Taiyuan 030051, China 2 School of Information and Communication Engineering, North University of China, Taiyuan 030051, China
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Affiliation:1 Shanxi Key Laboratory of Signal Capturing and Processing, North University of China, Taiyuan 030051, China 2 School of Information and Communication Engineering, North University of China, Taiyuan 030051, China
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Abstract:

In order to meet the demand of high precision image measurement of large object, a method of measuring large size target with wide field of vision by using fish eye camera image distortion is proposed. According to the polynomial approximation function of nonlinear distortion, the camera imaging model is established, and the camera parameters are determined through the stereo calibration plate; Move the camera along the optical axis to collect two images, and establish a measurement model to measure the size of the target to be measured. Through the measurement experiments of checkerboard and the geometric dimensions of a large building, it is shown that the method of directly using the distorted image proposed in this paper is superior to the traditional method of correcting the distorted image into a linear image, and has higher measurement accuracy and stability.

Key words:Large size target; Image measurement; fish eye camera; distortion characteristics; stereo calibration

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Online: March 29,2024
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