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Proceedings Paper

A novel non-uniformity correction method based on ROIC
Author(s): Xiaoming Chen; Yujue Li; Chao Di; Xinxing Wang; Yi Cao
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Paper Abstract

Infrared focal plane arrays (IRFPA) suffer from inherent low frequency and fixed patter noised (FPN). They are thus limited by their inability to calibrate out individual detector variations including detector dark current (offset) and responsivity (gain). To achieve high quality infrared image by mitigating the FPN of IRFPAs, we have developed a novel non-uniformity correction (NUC) method based on read-out integrated circuit (ROIC). The offset and gain correction coefficients can be calculated by function fitting for the linear relationship between the detector's output and a reference voltage in ROIC. We tested the purposed method using an infrared imaging system using the ULIS 03 19 1 detector with real nonuniformity. A set of 384*288 infrared images with 12 bits was collected to evaluate the performance. With the experiments, the non-uniformity was greatly eliminated. We also used the universe non-uniformity (NU) parameter to estimate the performance. The calculated NU parameters with the two-point calibration (TPC) and the purposed method imply that the purposed method has almost as good performance as TPC.

Paper Details

Date Published: 8 December 2011
PDF: 5 pages
Proc. SPIE 8002, MIPPR 2011: Multispectral Image Acquisition, Processing, and Analysis, 80020O (8 December 2011); doi: 10.1117/12.903305
Show Author Affiliations
Xiaoming Chen, Beijing Institute of Technology (China)
North System Engineering Institute (China)
Yujue Li, North System Engineering Institute (China)
Chao Di, North System Engineering Institute (China)
Xinxing Wang, North System Engineering Institute (China)
Yi Cao, North System Engineering Institute (China)

Published in SPIE Proceedings Vol. 8002:
MIPPR 2011: Multispectral Image Acquisition, Processing, and Analysis
Faxiong Zhang; Faxiong Zhang, Editor(s)

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