Visual Perception and LOD:
[lod_perception.jpg]

This talk provides a background on issues of visual perception as they
relate to the field of level of detail (LOD). It provides a useful
categorization of LOD techniques and describes various early attempts
to base the resolution of objects upon simple perceptually-inspired
criteria. We then provide a brief background on human visual
perception, and present the metric of contrast sensitivity as a means
to assess an observer's ability to resolve detail in an image. A
computational model is then presented that is based upon the contrast
sensitivity metric and two different systems are subsequently
described that implement this model in a real-time LOD system.  This
talk was part of Course #14, Advanced Issues in Level of Detail, at
SIGGRAPH 2002.