基于积分时间调整的红外焦平面阵列非均匀校正算法研究

利用实测的响应数据分析了红外焦平面阵列探测元的响应特性与入射辐射、积分时间的关系,指出了实际工程中常用的两点黑体辐射定标校正算法的本质在于利用高低温时不同的响应数据计算增益系数与偏置系数.与此相类似,通过调整积分时间也能得到不同的响应数据.因此对基于积分时间调整的校正算法展开研究,分别提出一点与两点定标校正算法,并将一点定标与小波多分辨率分解相结合,提出了一种新的自适应非均匀校正算法,实验结果证明了该方法在实际成像系统中的有效性.

RESEARCH ON NONUNIFORMITY CORRECTION OF IRFPA BASED ON INTEGRAL TIME ADJUST

The relationship of IRFPA between response characteristic and incidence radiation,integral time was analyzed by using the practical response data.The essence of two point blackbody radiometric calibration non-uniformity correction algorithm was proposed by using different response data of high and low temperature to calculate gain coefficient and bias coefficient.Resembling to this,different response data could also be gathered by adjusting integral time.Therefore,non-uniformity correction(NUC) algorithm based on integral time regulation was studied,one and two point calibration correction algorithm was first proposed,then combined with multi-resolution wavelet decomposition,a new adaptive NUC algorithm was presented.Experiments show that the proposed scheme achieves good performance when applied in real imaging system.