Modified Two-Point Correction Method for Wide-Spectrum LWIR Detection System

doi:10.3390/s23042054

CIOMP OpenIR

	Modified Two-Point Correction Method for Wide-Spectrum LWIR Detection System
	D. Zhang, H. Sun, D. Wang, J. Liu and C. Chen
	2023
发表期刊	Sensors
ISSN	14248220
卷号	23 期号:4
摘要	Non-uniformity commonly exists in the infrared focal plane, which behaves as the fixed-pattern noise (FPN) and seriously affects the image quality of long-wave infrared (LWIR) detection systems. The two-point correction (TPC) method is commonly used to reduce image FPN in engineering. However, when a wide-spectrum LWIR detection system calibrated with a black body is used to detect weak and small targets in the sky, FPN still appears in the image, affecting its uniformity. The effects of atmospheric transmittance characteristics of long-range paths on the non-uniformity of wide-spectrum long-wave infrared systems have not been studied. This paper proposes a modified TPC model based on spectral subdivision that introduces atmospheric transmittance. Additionally, the effects of atmospheric transmittance characteristics on the long-wave infrared non-uniform correction coefficient are analyzed. The experimental results for a black body scene and sky scene using a weak and small target detection system with a long-wave Sofradir FPA demonstrate that the wide-spectrum LWIR detection system fully considers atmospheric transmittance when performing calibration based on the TPC method, which can reduce the non-uniformity of the image. © 2023 by the authors.
DOI	10.3390/s23042054
URL	查看原文
收录类别	sci ; ei
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/68150
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	D. Zhang, H. Sun, D. Wang, J. Liu and C. Chen. Modified Two-Point Correction Method for Wide-Spectrum LWIR Detection System[J]. Sensors,2023,23(4).
APA	D. Zhang, H. Sun, D. Wang, J. Liu and C. Chen.(2023).Modified Two-Point Correction Method for Wide-Spectrum LWIR Detection System.Sensors,23(4).
MLA	D. Zhang, H. Sun, D. Wang, J. Liu and C. Chen."Modified Two-Point Correction Method for Wide-Spectrum LWIR Detection System".Sensors 23.4(2023).

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