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Abstract

Image synthesis concerns the generation of images represented by a descriptive model and their view on restitution units. Realistic visual simulation, in the field of image synthesis, is the discipline that studies the realistic image generation of three-dimensional objects. To describe the complex optical phenomena in the interaction of light with object surfaces in the scene, an illumination model is needed. The main goal of an accurate illumination model is to simulate the light distribution with respect to conservation and transport energy principles. The radiosity technique helps to define an analytical illumination model by expressing it with an energy balance. Model complexity is largely due to the calculation of geometric factors and named form factors, defined with a double area integral. Using Stokes theorem, the form factors can be reformulated, in a computationally more efficient manner, in the form of a double line integral. Two different techniques to calculate form factors are presented: the first, named projection method, uses optical Nusselt analogy to evaluate the double area integral; the second, named Stokes technique, evaluates numerically the double line integral.

Additional information

Authors: GROSSETIE J C, JRC Ispra (IT);CHECCHI E, JRC Ispra (IT);STRAGAPEDE C, Università degli Studi di Milano, Dipartimento Scienze dell'Informazione, Milano (IT)
Bibliographic Reference: EUR 13381 EN (1991) 11 pp., MF, ECU 4, blow-up copy ECU 5
Availability: (2)
Record Number: 199111436 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: en
Available languages: en