光学精密工程2016，Vol.24Issue(11)：2841-2847,7.DOI:10.3788/OPE.20162411.2841
红外成像系统的非均匀性实时校正
Real-time non-uniformity correction of infrared imaging system
摘要
Abstract
A real-time Non-Uniformity Correction(NUC) algorithm for a single-frame infrared image was proposed based on multi-thread optimization to correct the strip-type Fixed Pattern Noise (FPN ) generated by non-uniformity response from an infrared camera .Firstly ,the plus-relationship of the output value and the noise was determined by NUC algorithm based on total variation theory and a mathematical model was established to describe the strip noise . The image was split into a high-frequency component and a low-frequency component by filters ,and the strip noise was fitted from the high-frequency component by the mathematical model .Finally ,the real infrared image was restored by the plus-relationship obtained from the total variation theory .To improve the computing speed , the proposed algorithm was optimized with the multi-thread . The image quality evaluation of the proposed algorithm was carried out and its performance was compared with the Midway Infrared Equalization(MIRE) and the bilateral filter methods .Experimental results indicate that the proposed algorithm has reduced the response non-uniformity by 3% as compaired with original image according to national standard GB/T 17444-1998 , and its efficiency is no difference with that of the MIRE . Moreover ,system running time for an 14 bit infrared image with a resolution of 320 × 256 is 1 .5 ms/frame , which meets the engineering requirements .关键词
红外图像/成像系统/竖条纹噪声/非均匀性校正/实时处理Key words
infrared image/imaging system/strip-type noise/non-uniformity correction/real-time processing分类
信息技术与安全科学引用本文复制引用
李赓飞,李桂菊,韩广良,刘培勋,江山..红外成像系统的非均匀性实时校正[J].光学精密工程,2016,24(11):2841-2847,7.基金项目
国家自然科学基金资助项目 （）
