Back to articles
Articles
Volume: 17 | Article ID: art00004
Image
A Method for Designing and Assessing Sensors for Chromaticity Constancy in High Dynamic Range Scenes
  DOI :  10.2352/CIC.2009.17.1.art00004  Published OnlineJanuary 2009
Abstract

The dependence of an object's colour on the illuminant chromaticity makes it difficult to use colour as a reliable cue in machine vision applications, particularly in naturally illuminated high dynamic range scenes. To solve this problem the outputs from four logarithmic sensors with different spectral responses can be used to obtain a two dimensional description of an object's chromaticity that is independent of the illuminant. The spectral responses of these four sensors have been optimised. A simple test of colour separability then suggests that using the data from these sensors it is possible to match the ability of the human visual system to separate similar colours. A comparison of the performance of the proposed system when the reflectance and illuminantion data are both changed suggests that readily available data (Munsell reflectance spectra and CIE standard daylight spectra) can be used to design a generic system to separate colours that are described as matching each other. However, for applications that require discrimination between very well matched colours it may be necessary to use an application specific system designed using data relevant to the application.

Subject Areas :
Views 2
Downloads 0
 articleview.views 2
 articleview.downloads 0
  Cite this article 

Sivalogeswaran Ratnasingam, Steve Collins, Javier Hernández-Andrés, "A Method for Designing and Assessing Sensors for Chromaticity Constancy in High Dynamic Range Scenesin Proc. IS&T 17th Color and Imaging Conf.,  2009,  pp 15 - 20,  https://doi.org/10.2352/CIC.2009.17.1.art00004

 Copy citation
  Copyright statement 
Copyright © Society for Imaging Science and Technology 2009
72010350
Color and Imaging Conference
color imaging conf
2166-9635
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA