采用双三次插值的空间目标偏振成像

马岩; 张超子; 刘也; 张哲

doi:10.3788/OPE.20192712.2555

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采用双三次插值的空间目标偏振成像

现代应用光学 | 更新时间：2020-07-09

- 采用双三次插值的空间目标偏振成像
- Polarization imaging of space target based on bicubic interpolation
- 光学精密工程 2019年27卷第12期页码：2555-2563
- 作者机构：
  
  1.北京跟踪与通信技术研究所, 北京 100094
  2.中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
  3.中国科学院大学, 北京 100049
- 作者简介：
  
  [ "马岩 (1977-)，男，山东单县人，硕士，副研究员，2002年于北京跟踪与通信技术研究所获得硕士学位，主要从事目标测量与特征提取、信息融合处理与分析、数据计算技术的研究。E-mail：mayan888@sina.com" ]
  [ "张超子 (1993-)，男，吉林长春人，博士研究生，2016年于天津大学获得学士学位，主要从事光谱成像技术的研究。E-mail: chaozi_zhang@qq.com" ]
- 基金信息：
  
  国家自然科学基金资助项目(61890965)
- DOI：10.3788/OPE.20192712.2555
  中图分类号： O436.3; TP394.1
- 收稿日期：2019-09-05，
  
  录用日期：2019-10-16，
  
  纸质出版日期：2019-12-25
- 稿件说明：
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马岩, 张超子, 刘也, 等. 采用双三次插值的空间目标偏振成像[J]. 光学精密工程, 2019,27(12):2555-2563.

Yan MA, Chao-zi ZHANG, Ye LIU, et al. Polarization imaging of space target based on bicubic interpolation[J]. Optics and precision engineering, 2019, 27(12): 2555-2563.
马岩, 张超子, 刘也, 等. 采用双三次插值的空间目标偏振成像[J]. 光学精密工程, 2019,27(12):2555-2563. DOI： 10.3788/OPE.20192712.2555.

Yan MA, Chao-zi ZHANG, Ye LIU, et al. Polarization imaging of space target based on bicubic interpolation[J]. Optics and precision engineering, 2019, 27(12): 2555-2563. DOI： 10.3788/OPE.20192712.2555.

摘要

为了解决暗弱场景下空间目标与背景对比度过低，无法区分的问题，采用分焦面偏振成像系统分别对室外暗弱场景、室内空间模拟环境进行成像；为了弥补分焦面偏振成像系统图像分辨率下降的缺点，采用双三次插值算法进行上采样。通过分焦面偏振相机的一次曝光便可获得4个不同偏振角度下的光强图，进而解算出偏振度图像和偏振角图像，并与传统的光强图像进行对比；利用双三次插值算法对4幅光强图进行上采样提高图像分辨率，然后再解算出偏振度图像，与未通过上采样获得的偏振度图像进行对比。实验结果表明，偏振成像较之传统的光强成像，目标的对比度获得了提高，边缘信息、纹理信息得到了更好的展现，偏振度图像与光强图像相比，与对比度有关的EME指标至少提高了17%，双三次插值算法提高了成像分辨率。应用双三次插值算法的分焦面偏振成像系统，对暗弱场景下的空间目标的识别具有潜在的应用价值。

Abstract

To solve the problem in which the contrast between a space target and its background is too low to be distinguished in a dark scene

the focal-plane array polarization imaging system is used to image the outdoor dark scene and the indoor space simulation environment. At the same time

to compensate for the shortcomings of the decreased resolution of the focal-plane array polarization imaging system

the bicubic interpolation algorithm is used for upsampling. On one hand

the intensity image under four different polarization angles can be obtained by a single exposure of the focal-plane array polarizer camera

then

the Degree of Polarization (DOP) and the Angle of Polarization (AOP) images are compared to the intensity image. On the other hand

the bicubic interpolation algorithm is used to upsample the four intensity images to improve the image resolution and then

calculate the DOP image compared with the DOP image obtained without the upsampling procedure. The experimental results show that compared with traditional intensity imaging

the contrast of the target is improved

the edge information and texture information are better displayed by imaging polarimetry

and the final imaging resolution is improved by the bicubic interpolation algorithm. The measure of enhancement (EME)

a contrast evaluation index

is approximately 17% more in the DOP image than in the intensity image

proving that the focal plane polarization imaging system using a bicubic interpolation algorithm has potential application value for the identification of space targets in the dark scenes.

关键词

Keywords

references

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