This paper presents multispectral imaging as an alternative to conventional color imaging that showed deficiencies. Thermal infrared images have useful signatures are insensitive to different illuminations and viewing directions. Multispectral imaging by the information fusion of the visible images and thermal infrared images provides rich data information that can be used in face recognition. Comparatively to traditional face recognition, multispectral imaging can separate illumination and reflectance information of facial images. The use of fusion of visible and thermal images in face recognition shows better performance than traditional imagery.
Mamadou Diarra, Pierre Gouton, Adou Kablan Jérôme, "Multispectral face recognition using hybrid feature" in Proc. IS&T Int’l. Symp. on Electronic Imaging: Color Imaging XXII: Displaying, Processing, Hardcopy, and Applications, 2017, pp 200 - 203, https://doi.org/10.2352/ISSN.2470-1173.2017.18.COLOR-061