Analysis and Pumping of the Albedo Function

Information

• Publication Type: Technical Report
• Workgroup(s)/Project(s): not specified
• Date: July 1998
• Number: TR-186-2-98-20
• Keywords: perceptual based fitting, metal models, energy balance, albedo function, BRDF representation, Reflectance function

Abstract

The paper introduces a method, called the albedo pumping-up, to derive new, physically plausible BRDFs from an existing one or from any symmetric function. This operation can be applied recursively by arbitrary number of times. An important application of this operation is the transformation of the Phong and Blinn models in order to make them produce metallic effects. The paper also examines the albedo function of reflectance models and comes to the conclusion that widely used models violate energy balance at grazing angles.

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BibTeX

@techreport{Szir-1998-Pump,
  title =      "Analysis and Pumping of the Albedo Function",
  author =     "L\'{a}szl\'{o} Neumann and Attila Neumann and L\'{a}szl\'{o}
               Szirmay-Kalos",
  year =       "1998",
  abstract =   "The paper introduces a method, called the albedo pumping-up,
               to derive new, physically plausible BRDFs from an existing
               one or from any symmetric function. This operation can be
               applied recursively by arbitrary number of times. An
               important application of this operation is the
               transformation of the Phong and Blinn models in order to
               make them produce metallic effects. The paper also examines
               the albedo function of reflectance models and comes to the
               conclusion that widely used models violate energy balance at
               grazing angles.",
  month =      jul,
  number =     "TR-186-2-98-20",
  address =    "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria",
  institution = "Institute of Computer Graphics and Algorithms, Vienna
               University of Technology ",
  note =       "human contact: technical-report@cg.tuwien.ac.at",
  keywords =   "perceptual based fitting, metal models, energy balance,
               albedo function, BRDF representation, Reflectance function",
  URL =        "https://www.cg.tuwien.ac.at/research/publications/1998/Szir-1998-Pump/",
}