Optimizing multispectral cameras with broadband or narrowband optical filters is necessary for accurate color reproduction and spectral reconstruction. However, optimal broadband filter sets can provide better performance than narrowband filter sets under certain circumstances; previous studies have not addressed this. Herein, after selecting optimal filter sets by using the multi-objective optimization method, the optimal broadband and narrowband filter sets were systematically compared. Ten different noise variation levels and five distinct spectral channels were employed to process the imaging simulations. Moreover, typical commercial absorption glass filters were used as the broadband filters, and the transmittance curves of the narrow filters were generated by Gaussian functions with varying parameters rather than specific physical modalities. The results indicated that all the selected optimal broadband filter sets exhibited a better performance at lower noise levels, and all the optimal narrowband filter sets had comparatively stronger anti-noise features, although the optimal filter sets had a better performance than the suboptimal filter sets for both broadband or narrowband filter sets. The dependence of the two different types of the filters on noise levels for optimal performance is significant for designing multispectral cameras, especially for broadband multispectral imaging sensors during high-quality spectral acquisition.

中文翻译：

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多光谱彩色成像中低噪声水平下最优宽带滤波器组的优越性

使用宽带或窄带滤光片优化多光谱相机对于准确的色彩再现和光谱重建是必要的。但是，在某些情况下，最佳宽带滤波器组可以提供比窄带滤波器组更好的性能；以前的研究没有解决这个问题。在此，采用多目标优化方法选出最优滤波器组后，系统比较了最优宽带和窄带滤波器组。十个不同的噪声变化水平和五个不同的光谱通道被用来处理成像模拟。此外，典型的商业吸收玻璃滤光片被用作宽带滤光片，窄滤光片的透射率曲线是由具有不同参数的高斯函数而不是特定的物理模态生成的。结果表明，所有选择的最优宽带滤波器组在较低的噪声水平下表现出更好的性能，所有最优窄带滤波器组都具有相对较强的抗噪声特性，尽管最优滤波器组比次优滤波器组具有更好的性能宽带或窄带滤波器组。两种不同类型的滤波器对于优化性能的噪声水平的依赖性对于设计多光谱相机具有重要意义，特别是对于高质量光谱采集期间的宽带多光谱成像传感器。尽管对于宽带或窄带滤波器组，最佳滤波器组比次优滤波器组具有更好的性能。两种不同类型的滤波器对于优化性能的噪声水平的依赖性对于设计多光谱相机具有重要意义，特别是对于高质量光谱采集期间的宽带多光谱成像传感器。尽管对于宽带或窄带滤波器组，最佳滤波器组比次优滤波器组具有更好的性能。两种不同类型的滤波器对于优化性能的噪声水平的依赖性对于设计多光谱相机具有重要意义，特别是对于高质量光谱采集期间的宽带多光谱成像传感器。