Back to articles
Articles
Volume: 9 | Article ID: art00006
Image
Illuminating Illumination
  DOI :  10.2352/CIC.2001.9.1.art00006  Published OnlineJanuary 2001
Abstract

We introduce an active imaging method to measure scene illumination. The system implementation is divided into four steps. First, the system acquires two images: one is an ordinary image of the scene under ambient light and the other is a corresponding image in which light from the camera flash is added to the scene. Second, the image pair is analyzed to obtain an image that represents the scene as if it had been illuminated by the flash alone. Third, the flash-only image is used to estimate object reflectance functions. Fourth, using the estimated reflectance functions, the ambient illumination spectral power distribution is estimated. We present results that evaluate the method's stability with respect to changes in the mean reflectance function of the scene. Finally, we discuss limitations of the current implementation and alternative implementations.

Subject Areas :
Views 13
Downloads 1
 articleview.views 13
 articleview.downloads 1
  Cite this article 

Jeffrey M. DiCarlo, Feng Xiao, Brian A. Wandell, "Illuminating Illuminationin Proc. IS&T 9th Color and Imaging Conf.,  2001,  pp 27 - 34,  https://doi.org/10.2352/CIC.2001.9.1.art00006

 Copy citation
  Copyright statement 
Copyright © Society for Imaging Science and Technology 2001
72010350
Color and Imaging Conference
color imaging conf
2166-9635
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA