Polarization redundancy estimation scene-based non-uniformity correction algorithm

1.Research & Development Institute of Northwestern Polytechnical University in Shenzhen,Shenzhen 518057, China;2.School of Automation, Northwestern Polytechnical University, Xi’An 710072, China;3.School of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology,Xi'an 710075, China;4.Shanghai Institute of Aerospace Technology, Shanghai 201109, China;5.North Guangwei Technology Co., Ltd, Xi’An 710072, China

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Supported by the Science Technology and Innovation Commission of Shenzhen Municipality(JCYJ20170815162956949, JCYJ20180306171146740), Key R & D plan of Shaanxi Province (2020ZDLGY07-11), National Natural Science Foundation of China (NSFC)(61771391) , Funding of Yulin Smart Energy Big Data Application Joint Key Laboratory

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    Due to the heterogeneous characteristics of the infrared polarization focal plane, it is necessary to take into consideration the impact of the response differences in different bias channels on the overall correction effect in the process of non-uniform correction. The non-uniform correction problem of the infrared polarization focal plane is more complex than that of the ordinary homogeneous infrared focal plane. For non-uniformity correction of polarization focal plane, an algorithm based on scene-based polarization redundancy estimation is proposed. The statistical information between acquired images and estimated images from polarization redundancy is acquired, then the differences in the response of all pixels in the whole focal plane are obtained. By comparing and analyzing the differences from two directions in each polarization channel, we can obtain the updated gain correction coefficients. Then radiometric recalibration is used to suppress the ghost image caused by the static scene, and the gain correction coefficients in the current state are obtained. In this process, the gain correction coefficients are updated adaptively by evaluating the previous correction coefficients through polarization redundancy estimation. Finally, experiments on the real scene data demonstrate the effectiveness of the proposed non-uniformity correction algorithm for polarization images.

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WANG De-Tang, REN Zhi-Gang, LIU Sha, ZHAO Yong-Qiang, FANG Hui, ZHANG Lian-Dong. Polarization redundancy estimation scene-based non-uniformity correction algorithm[J]. Journal of Infrared and Millimeter Waves,2021,40(6):878~885

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  • Received:March 22,2021
  • Revised:December 02,2021
  • Adopted:June 29,2021
  • Online: November 29,2021
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