This work proposes the design of a miniaturized spectro-photo/radio-metric camera with spatial filtering of the light for measuring the spectral reflectance factor and the spectral radiance of the objects of a scene.
Andrea Della Patria, Fernando Fermi, Claudio Oleari, Angela Piegari, Anna Sytchkova, "A Portable Spectro-photo/radio-metric Camera with Spatial Filtering for VIS-NIR Imaging" in Proc. IS&T 19th Color and Imaging Conf., 2011, pp 285 - 289, https://doi.org/10.2352/CIC.2011.19.1.art00055