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ACM Transactions on Graphics (TOG), Volume 18 Issue 2, April 1999

Model and representation: the effect of visual feedback on human performance in a color picker interface
Sarah A. Douglas, Arthur E. Kirkpatrick
Pages: 96-127
DOI: 10.1145/318009.318011
User interfaces for color selection consist of a visible screen representation, an input method, and the underlying conceptual organization of the color model. We report a two-way factorial, between-subjects variable experiment that tested the...

Fast and accurate hierarchical radiosity using global visibility
Frédo Durand, George Drettakis, Claude Puech
Pages: 128-170
DOI: 10.1145/318009.318012
Recent hierarchical global illumination algorithms permit the generation of images with a high degree of realism. Nonetheless, appropriate refinement of light transfers, high quality meshing, and accurate visibility calculation can be...

Anisotropic diffusion for Monte Carlo noise reduction
Michael D. McCool
Pages: 171-194
DOI: 10.1145/318009.318015
Monte Carlo sampling can be used to estimate solutions to global light transport and other rendering problems. However, a large number of observations may be needed to reduce the variance to acceptable levels. Rather than computing more...

Techniques for interactive design using the PDE method
Hassan Ugail, Malcolm I. G. Bloor, Michael J. Wilson
Pages: 195-212
DOI: 10.1145/318009.318078
Interactive design of practical surfaces using the partial differential equation (PDE) method is considered. The PDE method treats surface design as a boundary value problem (ensuring that surfaces can be defined using a small set of design...