We introduce an image capturing system that results in spectral image archives with sufficient spatial resolution and colorimetric accuracy for artwork imaging. In this system, a multi-band, low-spatial resolution multi-spectral image is combined with a high-spatial resolution lightness image (from either a monochrome digital or digitized photograph) to generate a high-spatial resolution spectral image. An alternative way to capture multi-spectral images by combining a trichromatic camera and absorption filters is also presented to overcome the technical problems inherent to the use of interference filters in this kind of imaging.
Francisco H. Imai, Roy S. Berns, "High-Resolution Multi-Spectral Image Archives: A Hybrid Approach" in Proc. IS&T 6th Color and Imaging Conf., 1998, pp 224 - 227, https://doi.org/10.2352/CIC.1998.6.1.art00048