一种基于定标变积分时间的均匀校正算法

A Variable Integration Time Non⁃Uniformity Correction Algorithm Based on Calibration

在靶场光学测量领域,地基红外辐射特性测量系统不仅承担对目标辐射特性测量工作,而且还要实现目标跟踪成像和实况记录。然而,现有红外焦平面在制造工艺上的缺陷,以及红外辐射测量系统的光学系统自身热辐射的不均匀性,致使图像存在严重的非均匀性。基于传统的非均匀性校正方法在红外辐射特性测量系统应用的局限性,提出一种基于定标变积分时间的均匀校正算法。为证实校正效果,基于600 mm的中波红外辐射测量系统进行验证。实验结果表明,2.5 ms和3.0 ms下的原始图像非均匀度从3.69%降低至0.22%,证实所提算法具有良好的校正效果,有工程应用意义。

A ground⁃based infrared radiation characteristic measurement system not only undertakes the measurement of radiation characteristic,but also realizes the imaging in outfield.However,as for the manufacturing defects of the infrared focal the existing plane and the thermal radiation of system,it leads to the phenomenon of non⁃uniformity.Considering that the limitations of traditional non⁃uniformity correction algorithms,a variable integration time non⁃uniformity correction algorithm based on calibration was proposed in this paper.To confirm the effect of the proposed algorithm,the verification experiment based on 600 mm aperture mid⁃infrared radiation measurement system.The experimental results show that the original image non⁃uniformity under 2.5 ms and 3.0 ms is reduced from 3.69%to 0.22%.It is confirmed that the proposed algorithm has good correction effect and has engineering application significance.