Back to articles
Articles
Volume: 4 | Article ID: art00080
Image
Towards a psychophysical evaluation of colour constancy algorithms
  DOI :  10.2352/CGIV.2008.4.1.art00080  Published OnlineJanuary 2008
Abstract

Computational colour constancy tries to solve the problem of recovering the illuminant of a scene from an acquired image. The most popular algorithms developed to deal with this problem use heuristics to select a unique solution from within the feasible set. Their performance has shown that there is still a long way to go to globally solve this problem as a preliminary step in computer vision. Recent works tried to insert high-level constraints to improve the selection step, whose plausibility could be evaluated according to their performance on the final visual task. To allow comparisons of constraints independently of the task, in this work we present a new performance measure, the perceptual angular error. It tries to evaluate the performance of a colour constancy algorithm according to the perceptual preferences of humans instead of the actual optimal solution. To this end, we present a new version of our “MaxName” algorithm, which aims at solving the illuminant problem using high-level information such as the number of identifiably colours on a scene. Afterwards, we show the results of a psychophysical experiment comparing three colour constancy algorithms. Our results show that in more than half of the judgements the preferred solution is not the one closest to the optimal solution. This makes us conclude that such a perceptual comparison is feasible, and we could benefit from the construction of a large colour constancy database of calibrated images, labelled according to the illuminant preferred by human observers.

Subject Areas :
Views 26
Downloads 1
 articleview.views 26
 articleview.downloads 1
  Cite this article 

Javier Vazquez, Maria Vanrell, Ramon Baldrich, C. Alejandro Párraga, "Towards a psychophysical evaluation of colour constancy algorithmsin Proc. IS&T CGIV 2008/MCS'08 4th European Conf. on Colour in Graphics, Imaging, and Vision 10th Int'l Symp. on Multispectral Colour Science,  2008,  pp 372 - 377,  https://doi.org/10.2352/CGIV.2008.4.1.art00080

 Copy citation
  Copyright statement 
Copyright © Society for Imaging Science and Technology 2008
72010351
Conference on Colour in Graphics, Imaging, and Vision
conf colour graph imag vis
2158-6330
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA