Vazquez-Corral, JavierBertalmío, Marcelo2016-02-182016-02-182014Vazquez-Corral J, Bertalmío M. Spectral sharpening of color sensors: diagonal color constancy and beyond. Sensors. 2014;14:3965-3985. DOI: 10.3390/s140303965./n.1424-8220http://hdl.handle.net/10230/25896It has now been 20 years since the seminal work by Finlayson et al. on the use/nof spectral sharpening of sensors to achieve diagonal color constancy. Spectral sharpening is/nstill used today by numerous researchers for different goals unrelated to the original goal/nof diagonal color constancy e.g., multispectral processing, shadow removal, location of/nunique hues. This paper reviews the idea of spectral sharpening through the lens of what/nis known today in color constancy, describes the different methods used for obtaining a set/nof sharpening sensors and presents an overview of the many different uses that have been/nfound for spectral sharpening over the years.application/pdfeng© 2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article/ndistributed under the terms and conditions of the Creative Commons Attribution license.info:eu-repo/semantics/articlehttp://dx.doi.org/10.3390/s140303965Spectral sharpeningComputational color constancyCcolor sensorsinfo:eu-repo/semantics/openAccess