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New Non-uniformity Correction Approach for Infrared Focal Plane Arrays Imaging
Qu Hui-Ming,Gong Jing-tan,Huang Yuan,Chen Qian 한국광학회 2013 Current Optics and Photonics Vol.17 No.2
Although infrared focal plane array (IRFPA) detectors have been commonly used, non-uniformity correction (NUC) remains an important problem in the infrared imaging realm. Non-uniformity severely degrades image quality and affects radiometric accuracy in infrared imaging applications. Residual non-uniformity (RNU) significantly affects the detection range of infrared surveillance and reconnaissance systems. More effort should be exerted to improve IRFPA uniformity. A novel NUC method that considers the surrounding temperature variation compensation is proposed based on the binary nonlinear non-uniformity theory model. The implementing procedure is described in detail. This approach simultaneously corrects response nonlinearity and compensates for the influence of surrounding temperature shift. Both qualitative evaluation and quantitative test comparison are performed among several correction technologies. The experimental result shows that the residual non-uniformity, which is corrected by the proposed method,is steady at approximately 0.02 percentage points within the target temperature range of 283 K to 373K. Real-time imaging shows that the proposed method improves image quality better than traditional techniques.
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