简单光学系统的宽光谱点扩散函数估计 -

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简单光学系统的宽光谱点扩散函数估计

doi:10.3788/CO.20191206.1418

郑云达^{1, 2,},
黄玮^1,,,
潘云^{1, 2},
徐明飞¹,
贾树强¹,
张晓菲^{1, 2},
卢勇男^{1, 2}

1.
中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
2.
中国科学院大学, 北京 100049

基金项目:

应用光学国家重点实验室资助

详细信息

中图分类号:TP394.1;TH691.9
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- 文章访问数:1754
- HTML全文浏览量:465
- PDF下载量:112
- 被引次数:0
出版历程
- 收稿日期:2019-01-10
- 修回日期:2019-03-09
- 刊出日期:2019-12-01

Wide-spectrum PSF estimation for simple optical system

ZHENG Yun-da^{1, 2,},
HUANG Wei^1,,,
PAN Yun^{1, 2},
XU Ming-fei¹,
JIA Shu-qiang¹,
ZHANG Xiao-fei^{1, 2},
LU Yong-nan^{1, 2}

1.
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds:

the State Key Laboratory of Applied Optics

More Information

Author Bio:
ZHENG Yunda (1992—), Ph.D., male, from Yanbian, Jilin, obtained a bachelor's degree from the University of Science and Technology of China in 2014, he is mainly engaged in research in image restoration and optical design.E-mail:yundazheng@foxmail.com
HUANG Wei (1965—), researcher and doctoral tutor, male, from Jilin Changchun, he is mainly engaged in the research of optical systems design.E-mail:huangw@ciomp.ac.cn

Corresponding author:HUANG Wei, E-mail:huangw@ciomp.ac.cn

摘要

摘要:为了准确获取简单光学系统的点扩散函数（PSF），提升图像复原质量，本文提出了一种基于PSF测量的宽光谱PSF估计方法。首先，测量了光学系统的窄带PSF，并结合图像匹配算法，标定了实际光学系统中的探测器位置和光轴中心偏移。然后，模拟实际光学系统各波长、各视场的PSF，再结合目标反射光谱和探测器光谱敏感信息计算实际目标的宽光谱PSF。实验结果表明：本文提出的PSF估计方法明显优于窄带PSF估计和盲估计方法，复原图片质量和稳定性均有明显提升，能够准确估计实际光学成像系统的PSF。
- 计算成像/
- 点扩散函数/
- 图像复原/
- 宽光谱
Abstract:In order to obtain point spread functions(PSFs) of a simple optical system accurately and improve the restored image quality, we present a wide-spectrum PSF estimation method based on PSF measurements. First, narrow-band PSFs are measured, and combining image matching algorithm, the sensor position and the deviation of the optical axis in the real optical system are calibrated. Then, the PSF of each wavelength and field of view is simulated and used for calculating the wide-spectrum PSFs of the real optical system according to the object reflectance spectrum and the spectral sensitivity information of the sensor. Experimental results indicate that the proposed PSF estimation method is better than the narrow-band PSF estimation and blind PSF estimation. The restored image is more stable and its quality is improved significantly. The proposed method can estimate the PSFs of the real optical imaging system accurately.
- computational imaging/
- point spread function/
- image restoration/
- wide spectrum

HTML全文

图 1本文提出的宽光谱PSF估计的流程图

Figure 1.Flow chart of the proposed wide-spectrum PSF estimation

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图 2窄带PSF测量的实验装置示意图

Figure 2.Schematic diagram of experimental step for narrow-band PSF measurement

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图 3自制简单相机结构图

Figure 3.Configuration of the self-designed simple camera

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图 4自制简单相机的实物图

Figure 4.Prototype of self-designed simple camera

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图 5探测器位置匹配曲线

Figure 5.Sensor-position matching curve

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图 6测量PSF与匹配的模拟PSF对比

Figure 6.Comparison of measured PSFs and matching simulated PSFs

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图 7目标板反射光谱

Figure 7.Reflectance spectrum of target board

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图 8实际成像系统空间变化的宽光谱PSF

Figure 8.Spatially varying wide-spectrum PSF of the real imaging system

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图 9“卫星”图像^[18]复原结果对比。(a)模糊图；(b)Krishnan盲估PSF复原结果；(c)单波长PSF复原结果；(d)本文估计PSF的复原结果

Figure 9.Comparison of restored results for "satellite" image^[18]. (a)Blurred image, (b)restored results of Krishnan′s blind-estimated PSF, (c)restored results of single-wavelength PSF and (d)restored results of proposed method

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图 10“标靶”图像复原结果对比。(a)模糊图；(b)Krishnan盲估PSF复原结果；(c)单波长PSF复原结果；(d)本文估计PSF的复原结果

Figure 10.Comparison of restored results for target image. (a)Blurred image, (b)restored results of Krishnan′s blind-estimated PSF, (c)restored results of single-wavelength PSF and (d)restored results of proposed method

下载: 全尺寸图片幻灯片

表 1自制简单相机的镜头参数

Table 1.Lens parameters of the self-designed simple camera

Surface	Radius	Thickness	Glass
Object	Infinity	Infinity
1	31.84	4.00	HK9L_CDGM
2	125.56	5.80
stop	Infinity	5.80
4	21.29	3.50	HK9L_CDGM
5	109.53	25.42
Image	Infinity	0

下载: 导出CSV

表 2图像灰度平均梯度对比

Table 2.Comparison of image grayscale mean gradients

	Satellite	Target
Blurred image	0.002 4	0.003 1
Krishnanet al.	0.006 9	0.008 5
Using 532 nm PSF	0.108 0	0.013 1
Ours	0.109 0	0.014 1

下载: 导出CSV

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