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Nonuniformity correction of imaging systems with a spatially nonhomogeneous radiation source

机译：具有空间不均匀辐射源的成像系统的不均匀校正

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摘要

We present a novel method of nonuniformity correction of imaging systems in a wide optical spectral range by applying a radiation source with an unknown and spatially nonhomogeneous radiance or radiance temperature distribution. The benefit of this method is that it can be applied with radiation sources of arbitrary spatial radiance or radiance temperature distribution and only requires the sufficient temporal stability of this distribution during the measurement process. The method is based on the recording of several (at least three) images of a radiation source and a purposeful row- and line-shift of these sequent images in relation to the first primary image. The mathematical procedure is explained in detail. Its numerical verification with a source of a predefined nonhomogenous radiance distribution and a thermal imager of a predefined nonuniform focal plane array responsivity is presented.
机译：我们通过应用具有未知和空间上不均匀的辐射或辐射温度分布的辐射源，提出了在宽光谱范围内成像系统的不均匀校正的新方法。该方法的优点在于，它可以应用于任意空间辐射或辐射温度分布的辐射源，并且在测量过程中仅需要该分布具有足够的时间稳定性。该方法基于辐射源的几个（至少三个）图像的记录以及这些后续图像相对于第一主图像的有目的行和行移位。将详细说明数学过程。提出了使用预定义的非均匀辐射分布源和预定义的非均匀焦平面阵列响应度的热成像仪进行的数值验证。

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