Comparing Real & Synthetic Scenes using Human Judgements of Lightness

  • Ann McNamara
  • Alan Chalmers
  • Tom Troscianko
  • Iain Gilchrist
Part of the Eurographics book series (EUROGRAPH)


Increased application of computer graphics in areas which demand high levels of realism has made it necessary to examine the manner in which images are evaluated and validated. In this paper, we explore the need for including the human observer in any process which attempts to quantify the level of realism achieved by the rendering process, from measurement to display. We introduce a framework for measuring the perceptual equivalence (from a lightness perception point of view) between a real scene and a computer simulation of the same scene. Because this framework is based on psychophysical experiments, results are produced through study of vision from a human rather than a machine vision point of view. This framework can then be used to evaluate, validate and compare rendering techniques.


Lightness Perception Psychophysical Experiment Real Scene Global Illumination Original Scene 


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Copyright information

© Springer-Verlag Wien 2000

Authors and Affiliations

  • Ann McNamara
    • 1
  • Alan Chalmers
    • 1
  • Tom Troscianko
    • 2
  • Iain Gilchrist
    • 2
  1. 1.Department of Computer ScienceUK
  2. 2.Department of Experimental PsychologyUniversity of Bristol BristolUK

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