The research on polarimetric detection capability of ship targets in the sea fog
Received:April 09, 2020  Revised:January 08, 2021  download
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Author NameAffiliationE-mail
NI Xin-Yue Key Laboratory of Intelligent Infrared Perception Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China
University of Chinese Academy of Sciences Beijing 100049 .China 
963330909@qq.com 
YU Shu-Tian Key Laboratory of Intelligent Infrared Perception Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China
University of Chinese Academy of Sciences Beijing 100049 .China 
 
TANG Yu-Jun Key Laboratory of Intelligent Infrared Perception Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China tangyujun879@163.com 
CHEN Fan-Sheng Key Laboratory of Intelligent Infrared Perception Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China
Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou 310024China 
cfs@mail.sitp.ac.cn 
Abstract:Sea fog, as an important factor affecting the transmittance of the atmosphere, reduces the contrast between the ship targets and the sea-surface background in the infrared detection of ship targets on the sea. The traditional detection method based on infrared intensity cannot obtain ship targets as the contrast is less than the detection threshold with the increase of sea fog concentration. In view of the above situations, a background radiation suppression method based on sea surface polarimetric characteristics was developed to enhance the contrast according to the polarimetric characteristics of the sea fog scene. First, the relationship between the atmospheric transmittance of sea fog and infrared thermal radiation under different conditions is analyzed. Then, by analyzing the polarization characteristics of the sea surface radiation, a numerical model of the scene based on polarization contrast and intensity contrast was established. Finally, Analyzing the change regulation of threshold transmittance () and contrast improvement () under the circumstances of different detection angles, detection heights, and temperature differences between ship targets and sea surface. The simulation results indicate that gradually increases with the temperature difference and the detection angle decrease, along with the difference between the intensity and the polarization . but the intensity is always greater than the polarization . Therefore, the method provides a useful reference for ship detection in the sea fog environment with low atmospheric transmittance.
keywords:infrared polarization  contrast improvement  threshold transmittance  scene simulation
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Copyright:《Journal of Infrared And Millimeter Waves》