微偏振片阵列红外成像非均匀性产生机理及其校正

刘海峥; 史泽林; 冯斌

doi:10.3788/OPE.20182602.0480

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微偏振片阵列红外成像非均匀性产生机理及其校正

信息科学 | 更新时间：2020-07-05

- 微偏振片阵列红外成像非均匀性产生机理及其校正
- Mechanism and calibration of non-uniformity for IR polarization imagery obtained with integrated micro-polarizer array
- 光学精密工程 2018年26卷第2期页码：480-491
- 作者机构：
  
  1.中国科学院沈阳自动化研究所, 辽宁沈阳 110016
  2.中国科学院光电信息处理重点实验室, 辽宁沈阳 110016
  3.中国科学院大学, 北京 100049
- 作者简介：
  
  [ "刘海峥(1979-), 男, 宁夏银川人, 博士研究生, 副研究员，2002年于东北大学获得学士学位，2009年于中科院沈阳自动化研究所获得硕士学位，主要研究方向：红外成像、图像处理。E-mail:liuhz@sia.cn" ]
  [ "史泽林(1965-)，男，江苏宜兴人，博士生导师，研究员，1990年于西安电子科技大学获得硕士学位，2005年于中科院沈阳自动化研究所获得博士学位，研究方向：光电成像、光电跟踪、图像处理、目标识别。E-mail:zlsh@sia.cn" ]
- 基金信息：
  
  中国科学院创新基金(CXJJ-16S027)
- DOI：10.3788/OPE.20182602.0480
  中图分类号： TP394.1;TH691.9
- 收稿日期：2017-06-20，
  
  录用日期：2017-9-5，
  
  纸质出版日期：2018-02-25
- 稿件说明：
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刘海峥, 史泽林, 冯斌. 微偏振片阵列红外成像非均匀性产生机理及其校正[J]. 光学精密工程, 2018,26(2):480-491.

Hai-zheng LIU, Ze-lin SHI, Bin FENG. Mechanism and calibration of non-uniformity for IR polarization imagery obtained with integrated micro-polarizer array[J]. Optics and precision engineering, 2018, 26(2): 480-491.
刘海峥, 史泽林, 冯斌. 微偏振片阵列红外成像非均匀性产生机理及其校正[J]. 光学精密工程, 2018,26(2):480-491. DOI： 10.3788/OPE.20182602.0480.

Hai-zheng LIU, Ze-lin SHI, Bin FENG. Mechanism and calibration of non-uniformity for IR polarization imagery obtained with integrated micro-polarizer array[J]. Optics and precision engineering, 2018, 26(2): 480-491. DOI： 10.3788/OPE.20182602.0480.

摘要

集成微偏振片阵列红外成像系统的偏振度图像对非均匀性高度敏感，不经非均匀校正的偏振度图像存在较大误差。为了校正微偏振片阵列红外成像的非均匀性，以入射光Stokes矢量形式，建立了光电转换基本过程的偏振像素模型，基于入射激励和辐射响应数据，分析了微偏振阵列与红外焦面联合作用下非均匀性产生机理。提出一种基于多次辐射测量的矩阵形式的非均匀性校正方法，该方法通过构造多组测量方程，求解偏振像元的增益矢量，由相邻四像元增益矢量组成超级像元的增益矩阵，结合Stokes矢量提取矩阵，逆向求解重构点的校正矩阵。实验数据表明：该方法比两点法降低非均匀性约5%~20%，有效改善红外偏振度图像质量。

Abstract

For an infrared imaging system integrated with a micro-polarizer array (MPA)

DoLP (degree of linear polarization) images are extremely sensitive to non-uniformity. Therefore

large error will occur when the non-uniformity is not calibrated. In order to calibrate the non-uniformity

a polarized-pixel model for optoelectronic conversion process was constructed by taking the incident light as a Stokes vector

and the non-uniformity generation mechanism under the combined effect of a micro-polarizer array (MPA) and an infrared FPA was analyzed based on incident stimulation and radiation response data. A non-uniformity calibration (NUC) method was presented to solve the gain vectors of each polarized pixel by constructing multiple groups of measurement equations. The method constructed a gain matrix of a super pixel by using gain vectors from neighboring polarized pixels and joint Stokes extraction matrix to solve the NUC matrix inversely. The experimental results prove that the calibration method proposed reduces non-uniformity by 5-20%

and improves the quality of DoLP images effectively.

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Keywords

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