Fast non-uniformity correction for high dynamic infrared radiometric system

YU Yi; CHANG Song-tao; WANG Min; ZHAO Li-rong; JIANG Hui-lin

doi:10.3788/OPE.20152307.1932

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Fast non-uniformity correction for high dynamic infrared radiometric system

更新时间：2020-08-12

- Fast non-uniformity correction for high dynamic infrared radiometric system
- Optics and Precision Engineering Vol. 23, Issue 7, Pages: 1932-1938(2015)
- 作者机构：
  
  1. 长春理工大学光电工程学院,吉林长春,130022
  2. 中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152307.1932
  CLC： TN219
- Received：24 March 2015，
  
  Revised：20 May 2015，
  
  Published：25 July 2015
- 稿件说明：
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余毅, 常松涛, 王旻等. 宽动态范围红外测量系统的快速非均匀性校正[J]. 光学精密工程, 2015,23(7): 1932-1938

YU Yi, CHANG Song-tao, WANG Min etc. Fast non-uniformity correction for high dynamic infrared radiometric system[J]. Editorial Office of Optics and Precision Engineering, 2015,23(7): 1932-1938
余毅, 常松涛, 王旻等. 宽动态范围红外测量系统的快速非均匀性校正[J]. 光学精密工程, 2015,23(7): 1932-1938 DOI： 10.3788/OPE.20152307.1932.

YU Yi, CHANG Song-tao, WANG Min etc. Fast non-uniformity correction for high dynamic infrared radiometric system[J]. Editorial Office of Optics and Precision Engineering, 2015,23(7): 1932-1938 DOI： 10.3788/OPE.20152307.1932.

摘要

宽动态范围的红外辐射特性测量系统往往预设多个积分时间档位

并对每个积分时间逐一进行非均匀性校正。本文研究了不同积分时间下非均匀性校正系数有的差异问题

基于黑体定标法和积分时间法提出了新的非均匀性校正方法。该方法只需要得到两个积分时间和两个定标温度点即可得到全动态范围所有积分时间下的非线性校正系数

可在保证校正精度的同时减少辐射源温度点

降低校正时间。使用某

400 mm口径的地基红外辐射特性测量系统对该方法进行了验证。结果表明

采用本文方法后图像的非均匀性由3.78%减小到0.24%。由4 ms下的校正数据可知

得到的校正结果接近直接用该积分时间进行校正的精度。提出的方法简化了所需设备

降低了校正时间

具有实时性强、精度高等特点

适用于外场测量。

Abstract

Several different integration time steps are often required for a high dynamic infrared radiometric system

therefore

its non-uniformity is usually corrected one by one. As there are different correction coefficients in different time

this paper proposes a new non-uniformity correction method based on blackbody calibration method and integration time calibration method.The method obtains nonlinear correction coefficients of all integration time in whole dynamic ranges only by two integration time steps and two calibration temperature points

meanwhile keeping correction accuracy

reducing measuring temperature points and correction time. The verifying experiments for the proposed method are performed by using a

400 mm ground-based infrared radiometric system.The results show that the uniformity has reduced from 3.78% to 0.24% by using the proposed method. In addition

the result at 4 ms integration time illustrates that this method has a higher precision. Moreover

it greatly reduces the required equipment and correction time

and is characterized by good real-time performance and suitable for field measurements.

关键词

Keywords

references

CAO Y P,TISSE C L. Single-image-based solution for optics temperature-dependent nonuniformity correction in an uncooled long-wave infrared camera[J]. Optics Letters, 2014,39(3):646-648.

白俊奇,陈钱, 钱惟贤, 等. 基于环境温度的红外焦平面阵列非均匀性校正[J]. 红外与毫米波学报, 2010, 29(1): 49-52. BAI J Q,CHEN Q, QIAN W X,et al.. Nonuniformity correction for infrared focal plane arrays based on environmental temperature[J]. J. Infrared Millim. Waves, 2010, 29(1): 49-52.(in Chinese)

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李宁,杨词银, 曹立华, 等. 3~5 μm红外焦平面阵列的辐射定标[J]. 光学精密工程, 2011, 19(10): 2319-2325. LI N, YANG C Y, CAO L H, et al.. Radiance calibration for 3~5 μm infrared focal plane array [J]. Opt. Precision Eng., 2011, 19(10): 2319-2325. (in Chinese)

中国科学院上海技术物理研究所. GB/T 17444-1998 红外焦平面阵列特性参量测试技术规范[S]. 北京: 中国标准社, 1988. Shanghai Institute of Technical Physics of Chinese Academy of Sciences. GB/T 17444-1988 The technical norms of measurement and test of characteristic parameters of infrared focal plane arrays [S]. Beijing: China Zhijian Publishing House, 1988. (in Chinese)

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