Vignetting correction for IRFPA-based train axle temperature measurement system

Guangting Liu; Dayuan Yan; Xiaoming Hu; Hao Zhang; Lei Zhu

doi:10.1117/12.904656

28 November 2011 Vignetting correction for IRFPA-based train axle temperature measurement system

Guangting Liu, Dayuan Yan, Xiaoming Hu, Hao Zhang, Lei Zhu

Proceedings Volume 8200, 2011 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Processing Technology; 820006 (2011) https://doi.org/10.1117/12.904656
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China

Abstract

Using thermal infrared imaging to obtain the temperature distribution of the train wheel sets is a new and promising temperature measurement method. The accuracy and precision of the method are suffered from vignetting. In this paper, the vignetting coefficient function has been derived and imaging system calibration is introduced to compensate the measurement result error caused by the inconsistent of the optic center and the image center. The vignetting correction is implemented on the hardware platform based on FPGA. Experimental results demonstrate that vignetting correction enhance the accuracy of measurement system.

Citation Download Citation

Guangting Liu, Dayuan Yan, Xiaoming Hu, Hao Zhang, and Lei Zhu "Vignetting correction for IRFPA-based train axle temperature measurement system", Proc. SPIE 8200, 2011 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Processing Technology, 820006 (28 November 2011); https://doi.org/10.1117/12.904656

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