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Sensors 2014, 14(3), 3965-3985; doi:10.3390/s140303965

Spectral Sharpening of Color Sensors: Diagonal Color Constancy and Beyond

*  and
Information and Communications Technologies Department, Universitat Pompeu Fabra, Roc Boronat 138, Barcelona 08018, Spain
* Author to whom correspondence should be addressed.
Received: 24 December 2013 / Revised: 23 January 2014 / Accepted: 19 February 2014 / Published: 26 February 2014
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in Spain 2013)
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It has now been 20 years since the seminal work by Finlayson et al. on the use of spectral sharpening of sensors to achieve diagonal color constancy. Spectral sharpening is still used today by numerous researchers for different goals unrelated to the original goal of diagonal color constancy e.g., multispectral processing, shadow removal, location of unique hues. This paper reviews the idea of spectral sharpening through the lens of what is known today in color constancy, describes the different methods used for obtaining a set of sharpening sensors and presents an overview of the many different uses that have been found for spectral sharpening over the years.
Keywords: spectral sharpening; computational color constancy; color sensors spectral sharpening; computational color constancy; color sensors
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Vazquez-Corral, J.; Bertalmío, M. Spectral Sharpening of Color Sensors: Diagonal Color Constancy and Beyond. Sensors 2014, 14, 3965-3985.

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