基于点扩散函数的小目标辐射测量

常松涛; 孙志远; 张尧禹; 朱玮

doi:10.3788/OPE.20142211.2879

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基于点扩散函数的小目标辐射测量

现代应用光学 | 更新时间：2020-08-13

- 基于点扩散函数的小目标辐射测量
- Radiation measurement of small targets based on PSF
- 光学精密工程 2014年22卷第11期页码：2879-2887
- 作者机构：
  
  1. 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
  2. 中国科学院大学北京,中国,100049
- 作者简介：
- 基金信息：
  
  国家863高技术研究发展计划资助项目(No.2012AA121502)()
- DOI：10.3788/OPE.20142211.2879
  中图分类号： TN215;TP732+.2
- 收稿日期：2013-09-25，
  
  修回日期：2013-10-24，
  
  纸质出版日期：2014-11-25
- 稿件说明：
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常松涛, 孙志远, 张尧禹等. 基于点扩散函数的小目标辐射测量[J]. 光学精密工程, 2014,22(11): 2879-2887

CHANG Song-tao, SUN Zhi-yuan, ZHANG Yao-yu etc. Radiation measurement of small targets based on PSF[J]. Editorial Office of Optics and Precision Engineering, 2014,22(11): 2879-2887
常松涛, 孙志远, 张尧禹等. 基于点扩散函数的小目标辐射测量[J]. 光学精密工程, 2014,22(11): 2879-2887 DOI： 10.3788/OPE.20142211.2879.

CHANG Song-tao, SUN Zhi-yuan, ZHANG Yao-yu etc. Radiation measurement of small targets based on PSF[J]. Editorial Office of Optics and Precision Engineering, 2014,22(11): 2879-2887 DOI： 10.3788/OPE.20142211.2879.

摘要

提出了一种基于点扩散函数(PSF)精确测量尺寸很小或者距离很远的一类小目标的红外辐射特性的方法。该方法在已知目标几何形状的前提下

采用倾斜刃边法测得光学系统的点扩散函数;对目标成像和探测器焦平面阵列采样过程进行建模

得到目标在探测器上成像的模拟图像;通过对红外系统捕获的模拟图像与真实图像进行匹配获得最优化估计的目标亮度、尺寸以及中心位置。最后

通过实验对该方法进行了验证。结果显示:圆形目标温度为70℃

理想几何成像直径大于4个像元时

测得的辐射亮度最大误差为2.35%;目标尺寸(面积)最大误差为1.89%。该方法可用于获取目标和背景辐射特性

测试红外成像系统性能

完成图像复原和小目标定位等。

Abstract

A measurement algorithm based on Point Spread Function (PSF) was proposed to accurately measure radiation characteristics of infrared small targets which are tiny or quite far away from the IR imaging system. With the method

the PSF of the optical system was measured by using the slanted edge method under the premise of given target shapes. Then

the processes of imaging and sampling of the infrared focal plane arrays were modeled and the simulated image of the target on a detector was obtained. Furthermore

the radiance

size and center position of the target were estimated accurately by matching the simulated image and the actual image obtained from the IR imaging system. Finally

experiments were performed to verify this method. The obtained results show when the temperature of a circular target is 70 ℃ and the ideal imaging diameter is greater than 4 pixels

the maximum error of radiance measurement is 2.35% and that of the target size (area) measurement is 1.89%. The experimental results demonstrate that the method is feasible and is suitable for capturing radiation properties of targets or backgrounds

performance measurement of infrared systems

image restoration and small target positioning.

关键词

Keywords

references

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