Laser & Optoelectronics Progress, Volume. 60, Issue 22, 2211001(2023)
Static Calibration Method for Line-Scan Cameras in 2D Space
Figures & Tables(13)
Fig. 10. Comparison of distortion correction strategies. (a) Distorted pixel coordinate fitting method; (b) error of the distorted pixel coordinate fitting method; (c) distortion value fitting method; (d) error of the distortion value fitting method
Table 1. Experimental configuration
View tableTable 1. Experimental configuration
Name Configuration Line scan camera Hikvision MV-CL042-90GC， resolution of 4096×2 Line scan lens Chiopt LS6016A， focal length of 60 mm Line scan light Hannover LSH-200W， length of luminescence of 200 mm， white Mounting rod Φ30×200 mm Calibration plate 180×13 mm （ Fig. 4 ）Six degree of freedom robot AUBO-i5 Programming software Matlab2021b
Table 2. Results of calibration accuracy of the proposed method
View tableTable 2. Results of calibration accuracy of the proposed method
Calibration Position 0° 2° 4° Pixel Calibration value /mm Error /mm Pixel Calibration value /mm Error/mm Pixel Calibration value /mm Error /mm E（170 mm） E1 3921 174.753 -0.247 3914 174.864 -0.136 3932 174.794 -0.206 Resolution （mm·pixel-1） 0.04457 0.04468 0.04445 A
（10 mm）
A1 227 9.995 -0.005 229 9.953 -0.047 233 9.971 -0.029 A2 225 9.954 -0.046 226 9.919 -0.081 230 9.971 -0.029 A3 225 9.992 -0.008 226 10.005 0.005 228 10.007 0.007 A4 223 9.944 -0.056 223 9.970 -0.030 224 9.969 -0.031 A5 224 10.029 0.029 222 10.021 0.021 223 10.056 0.056 A6 222 9.969 -0.031 219 9.962 -0.038 219 9.982 -0.018 A7 225 10.125 0.125 221 10.123 0.123 220 10.138 0.138 B
（25 mm）
B1 566 24.960 -0.040 572 24.936 -0.064 580 24.918 -0.082 B2 561 24.890 -0.110 564 24.916 -0.084 570 24.941 -0.059 B3 559 24.927 -0.073 558 24.947 -0.053 560 24.923 -0.077 B4 557 24.958 -0.042 552 24.967 -0.033 551 24.915 -0.085 B5 556 25.008 0.008 548 25.053 0.053 545 25.032 0.032 C
（50 mm）
C1 1130 49.941 -0.059 1140 49.931 -0.069 1154 49.896 -0.104 C2 1118 49.854 -0.146 1115 49.848 -0.152 1121 49.887 -0.113 C3 1112 49.955 -0.045 1098 50.016 0.016 1094 49.977 -0.023 D
（100 mm）
D1 2251 99.861 -0.139 2262 99.931 -0.069 2282 99.865 -0.135 D2 2241 99.925 -0.075 2236 99.957 -0.043 2247 99.967 -0.033 D3 2230 99.877 -0.123 2209 99.849 -0.151 2210 99.867 -0.133 MAE 0.064 0.063 0.066 σ 0.063 0.065 0.068
Table 3. Results of calibration accuracy of Horaud method
View tableTable 3. Results of calibration accuracy of Horaud method
Calibration Position 0° 2° 4° Pixel Calibration value /mm Error /mm Pixel Calibration value/mm Error /mm Pixel Calibration value /mm Error /mm E（170 mm） E1 3921 174.753 -0.247 3914 174.864 -0.136 3932 174.794 -0.206 Resolution （mm·pixel-1） 0.04457 0.04468 0.04445 A
（10 mm）
A1 226 9.841 -0.159 229 9.953 -0.047 233 10.041 0.041 A2 225 9.966 -0.034 226 9.932 -0.068 230 10.038 0.038 A3 225 10.006 0.006 226 10.008 0.008 228 10.011 0.011 A4 223 9.933 -0.067 223 9.963 -0.037 224 9.936 -0.064 A5 224 10.025 0.025 222 10.020 0.020 223 10.053 0.053 A6 222 9.983 -0.017 219 9.968 -0.032 219 10.008 0.008 A7 225 10.103 0.103 221 10.113 0.113 220 10.098 0.098 B
（25 mm）
B1 566 24.807 -0.193 572 24.954 -0.046 580 25.112 0.112 B2 561 24.934 -0.066 564 24.931 -0.069 570 24.992 -0.008 B3 559 24.901 -0.099 558 24.931 -0.069 560 24.844 -0.156 B4 557 24.961 -0.039 552 24.969 -0.031 551 24.930 -0.070 B5 556 24.995 -0.005 548 25.044 0.044 545 25.008 0.008 C
（50 mm）
C1 1130 49.831 -0.169 1140 49.976 -0.024 1154 50.211 0.211 C2 1118 49.817 -0.183 1115 49.825 - 0.1751121 49.761 -0.239 C3 1112 49.965 -0.035 1098 50.017 0.017 1094 50.002 0.002 D
（100 mm）
D1 2251 99.740 - 0.2602262 99.959 -0.041 2282 100.077 0.077 D2 2241 99.938 -0.062 2236 99.953 -0.047 2247 99.920 -0.080 D3 2230 99.841 -0.159 2209 99.828 -0.172 2210 99.779 -0.221 MAE 0.093 0.059 0.083 σ 0.090 0.066 0.111
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Xinyu Suo, Jian Liu, Jie Zhang, Chaoqun Jin, Feitao Zhou. Static Calibration Method for Line-Scan Cameras in 2D Space[J]. Laser & Optoelectronics Progress, 2023, 60(22): 2211001
Paper Information
Category: Imaging Systems
Received: Dec. 19, 2022
Accepted: Feb. 27, 2023
Published Online: Nov. 6, 2023
The Author Email: Jian Liu (liujian@hun.edu.cn)
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