A perceptually based physicla error metric for realistic image synthesis

摘要

We introduce a new concept for accelerating realistic image synthesis algrithms.At the ocre of this procedure is a novel physical error metric that correctly predicts the perceptual threshold for detecitng artifacts in cene4 features.Built into this metric is a ocmputational model of the human visual system's loss of sensitiviyt at high back ground 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 spatially dependent processing independetly.This allows us to precompute the expensive spatially-dependent component,making our model extremely efficient.