Modified Two-Point Correction Method for Wide-Spectrum LWIR Detection System
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...
| Main Authors: | , , , , |
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/4/2054 |
| _version_ | 1797618270253088768 |
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| author | Di Zhang He Sun Dejiang Wang Jinghong Liu Cheng Chen |
| author_facet | Di Zhang He Sun Dejiang Wang Jinghong Liu Cheng Chen |
| author_sort | Di Zhang |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-11T08:10:40Z |
| format | Article |
| id | doaj.art-441f1842eb4f4d52a826c703873ccd26 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T08:10:40Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-441f1842eb4f4d52a826c703873ccd262023-11-16T23:09:42ZengMDPI AGSensors1424-82202023-02-01234205410.3390/s23042054Modified Two-Point Correction Method for Wide-Spectrum LWIR Detection SystemDi Zhang0He Sun1Dejiang Wang2Jinghong Liu3Cheng Chen4Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaNon-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.https://www.mdpi.com/1424-8220/23/4/2054atmospheric transmittancelong wave infrarednon-uniformity correctiontwo-point correctionfixed-pattern noise |
| spellingShingle | Di Zhang He Sun Dejiang Wang Jinghong Liu Cheng Chen Modified Two-Point Correction Method for Wide-Spectrum LWIR Detection System Sensors atmospheric transmittance long wave infrared non-uniformity correction two-point correction fixed-pattern noise |
| title | Modified Two-Point Correction Method for Wide-Spectrum LWIR Detection System |
| title_full | Modified Two-Point Correction Method for Wide-Spectrum LWIR Detection System |
| title_fullStr | Modified Two-Point Correction Method for Wide-Spectrum LWIR Detection System |
| title_full_unstemmed | Modified Two-Point Correction Method for Wide-Spectrum LWIR Detection System |
| title_short | Modified Two-Point Correction Method for Wide-Spectrum LWIR Detection System |
| title_sort | modified two point correction method for wide spectrum lwir detection system |
| topic | atmospheric transmittance long wave infrared non-uniformity correction two-point correction fixed-pattern noise |
| url | https://www.mdpi.com/1424-8220/23/4/2054 |
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