短波红外相机响应非均匀性校正方法研究及仿真

介绍短波红外相机非均匀性校正的两种基本方法,两点校正法以及多点校正法,同时提出改进算法即定标和场景融合的校正算法。此方法能够自适应克服红外焦平面阵列探测单元的响应漂移现象,克服外界环境改变带来的校正误差,实现短波红外相机在工作时间延长和多变环境情况下的高精度实时非均匀性校正,且不需要重新定标,方法简单,效果明显。采用像元数为320×256的红外焦平面阵列进行红外相机非均匀性实时校正实验,并将三种方法用MATLAB软件分别进行仿真,实验结果达到预期目的,校正效果良好。

Research and Simulation of Non Uniformity Correction Method for Short Wave Infrared Camera

In this paper, two basic methods of nonuniformity correction of short wave infrared camera are introduced, including two-point correction method and multiple point correction method. At the same time, an improved algorithm is proposed, which is the correction algorithm of calibration and scene fusion. The response drift of the infrared focal plane array detector can be overcome. To overcome the correction error caused by the change of the external environ-ment, high precision real time nonuniformity correction of short wave infrared camera in working time and changeable environment can be realized. And the standard need not to be reset,the method is simple,the effect is obvious. Non-uniformity real-time calibration experiment is adopted in infrared camera using infrared focal plane array with pixel num-ber 320 × 256. And the three methods are simulated by MATLAB software, the experimental results showed that the desired objectives is achieved and the correction effect is good.