For multi- and hyperspectral imagers, the integrity of the spectral information depends critically on the spatial coregistration between bands. There is at present no commonly accepted way to fully specify coregistration performance. This Letter shows how a relatively simple measurement technique can be used to form sharp images of the point spread function (PSF) in all bands, yielding information about spatial coregistration, as well as spatial resolution. A previously proposed metric is applied to characterize coregistration in terms of PSF similarity between bands. Resolution is characterized by ensquared energy. Two commercial hyperspectral cameras with nominally similar specifications are compared, and turn out to have large differences in their actual performance. The results, and the relative simplicity of the measurement, suggest that the method is suitable as a standardized performance test.

中文翻译：

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光谱成像仪中空间共配误差和空间分辨率的完整表征

对于多光谱和高光谱成像仪，光谱信息的完整性关键取决于波段之间的空间配准。当前，尚没有一种普遍接受的方法来完全指定核心管理性能。这封信显示了如何使用相对简单的测量技术来在所有频带中形成点扩展函数（PSF）的清晰图像，从而获得有关空间核心分布以及空间分辨率的信息。根据频带之间的PSF相似性，使用先前提出的度量来表征共容性。分辨率以平方能量为特征。比较了两个名义上规格相似的商用高光谱相机，结果发现它们的实际性能差异很大。结果以及测量的相对简单性，