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SIGGRAPH
1999
ACM

A Perceptually Based Physical Error Metric for Realistic Image Synthesis

10 years 3 months ago
A Perceptually Based Physical Error Metric for Realistic Image Synthesis
We introduce a new concept for accelerating realistic image synthesis algorithms. At the core of this procedure is a novel physical error metric that correctly predicts the perceptual threshold for detecting artifacts in scene features. Built into this metric is a computational model of the human visual system’s loss of sensitivity at high background illumination levels, high spatial frequencies, and high contrast levels (visual masking). An important feature of our model is that it handles the luminance-dependent processing and spatiallydependent processing independently. This allows us to precompute the expensive spatially-dependent component, making our model extremely efficient. We illustrate the utility of our procedure with global illumination algorithms used for realistic image synthesis. The expense of global illumination computations is many orders of magnitude higher than the expense of direct illumination computations and can greatly benefit by applying our perceptually...
Mahesh Ramasubramanian, Sumanta N. Pattanaik, Dona
Added 03 Aug 2010
Updated 03 Aug 2010
Type Conference
Year 1999
Where SIGGRAPH
Authors Mahesh Ramasubramanian, Sumanta N. Pattanaik, Donald P. Greenberg
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