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Radiometric calibration of infrared imagers using an internal shutter as an equivalent external blackbody

机译：使用内部快门作为等效外部黑体对红外热像仪进行辐射度校准

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摘要

Advances in microbolometer long-wave infrared (LWIR) detectors have led to the common use of infrared cameras that operate without active temperature stabilization, but the response of these cameras varies with their own temperature. Therefore, obtaining quantitative data requires a calibration that compensates for these errors. This paper describes a method for stabilizing the camera's response through software processing of consecutive images of the scene and images of the camera's internal shutter. An image of the shutter is processed so that it appears as if it were viewed through the lens. The differences between the scene and the image of the shutter treated as an external blackbody are then related to the radiance or temperature of the objects in the scene. This method has been applied to two commercial LWIR cameras over a focal plane array temperature range of ±7.2℃, changing at a rate of up to ±0.5℃/ min. During these tests, the rms variability of the camera output was reduced from ±4.0℃ to ±0.26℃.
机译：微型测辐射热仪长波红外（LWIR）检测器的进步已导致红外摄像头的普遍使用，这种红外摄像头在没有主动温度稳定的情况下运行，但是这些摄像头的响应随其自身温度而变化。因此，获得定量数据需要校准以补偿这些误差。本文介绍了一种通过对场景的连续图像和相机内部快门的图像进行软件处理来稳定相机响应的方法。处理快门的图像，使其看起来就像通过镜头观看一样。然后，场景与被视为外部黑体的快门图像之间的差异与场景中对象的辐射度或温度有关。该方法已应用于焦平面阵列温度范围为±7.2℃，变化速率最高为±0.5℃/ min的两台商用LWIR摄像机。在这些测试中，摄像机输出的均方根变化从±4.0℃降至±0.26℃。

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  • 来源
    《Optical engineering》 |2014年第12期|123106.1-123106.7|共7页
  • 作者

    Paul W. Nugent; Joseph A. Shaw; Nathan J. Pust;

  • 作者单位

    Montana State University, Department of Electrical and Computer Engineering, 610 Cobleigh Hall, Bozeman, Montana 59717-3780, United States;

    Montana State University, Department of Electrical and Computer Engineering, 610 Cobleigh Hall, Bozeman, Montana 59717-3780, United States;

    Montana State University, Department of Electrical and Computer Engineering, 610 Cobleigh Hall, Bozeman, Montana 59717-3780, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    infrared imaging; thermal imaging; radiometry; remote sensing;

    机译：红外成像热成像放射线学遥感;

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