A Statistical Model for Daylight Spectra

  • Martyn Williams
  • William A. P. Smith
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5875)


In this paper we present a statistical model, learnt from empirical data, which captures variations in the spectra of daylight. We demonstrate two novel techniques which use the model to constrain vision and graphics problems. The first uses the model generatively to render scenes using spectra which are constrained to be plausible. The second uses the model to solve the ill-posed problem of estimating high dimensional illumination spectra from one or more tristimulus images, such as might be observed over the course of a day.


Optical Society Colour Constancy Correlate Color Temperature Calibration Material Time Lapse Sequence 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Martyn Williams
    • 1
  • William A. P. Smith
    • 1
  1. 1.Department of Computer ScienceThe University of YorkUK

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