一种新的红外焦平面阵列非均匀性代数校正算法  

New algebraic scene-based non-uniformity correction in infrared focal plane array

作　　者：贺明[1] 王新赛[1] 路建方[1] 吴强[1] 徐华亮[1] 

机构地区：[1]防空兵指挥学院红外与成像制导技术实验室,河南郑州450052

出　　处：《应用光学》2011年第6期1217-1221,共5页Journal of Applied Optics

摘　　要：针对传统红外图像非均匀性代数校正算法收敛速度慢、运动估计精度不高的缺点,提出一种多尺度光流帧间运动估计的非均匀代数校正算法。通过时域低通滤波,采用多尺度光流估计下一帧图像,将所得图像对进行代数校正。该方法性能在自主研发的热像仪中得到验证,和传统的红外图像非均匀性代数校正算法相比,算法收敛速度从60帧提高到25帧,提高一倍左右,运动估计精度从校正后图像方差76.539减少到32.482。Since traditional non-uniformity correction algorithm has slow convergence and inaccurate prediction,a multi-scale optical flow motion estimation based algorithm is developed.Random image noise between frames is filtered by time-domain low-pass filter,and the next frame is estimated by using the multi-scale optical flow,then the non-uniformity correction is carried out.This algorithm is demonstrated in the thermal imager developed by us.Compared with the traditional non-uniformity correction algorithm,the convergence rate of this algorithm decreases form 60 frames to 25 frames;the precision of prediction is improved by 100%,and the corrected image variance is decreased from 76.539 to 32.482.

关 键 词：红外焦平面阵列 多尺度光流 代数算法 双线性插值 时域低通滤波器 

分 类 号：TN219[电子电信—物理电子学]