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James A. Ferwerda Sumanta N. Pattanaik Peter Shirley Donald P. Greenberg A Model of Visual Adaptation for Realistic Image Synthesis By Nigel Thomas 10/22/04
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James A. FerwerdaSumanta N. Pattanaik
Peter ShirleyDonald P. Greenberg
A Model of Visual Adaptation for Realistic Image Synthesis
By Nigel Thomas 10/22/04
Washington University in St. LouisMedia & Machines Lab
2Nigel [email protected]
Overview
Introduction
Physiological foundations of adaptation
A psychophysical model of adaptation
Implementation
Results
Conclusion / Future Work
Washington University in St. LouisMedia & Machines Lab
3Nigel [email protected]
Introduction
Human eye
Washington University in St. LouisMedia & Machines Lab
4Nigel [email protected]
Introduction
Luminance in natural environments
Washington University in St. LouisMedia & Machines Lab
5Nigel [email protected]
Physiological foundation of adaptation The pupil
The rod and cone systems
Bleaching and regeneration of photopigments
Neural processes
Washington University in St. LouisMedia & Machines Lab
6Nigel [email protected]
A psychophysical model of adaptation
Threshold studies
Washington University in St. LouisMedia & Machines Lab
7Nigel [email protected]
A psychophysical model of adaptation
Changes in color appearance
Washington University in St. LouisMedia & Machines Lab
8Nigel [email protected]
A psychophysical model of adaptation
Changes in color appearance
Washington University in St. LouisMedia & Machines Lab
9Nigel [email protected]
A psychophysical model of adaptation
Measuring visual acuity
Snellen Acuity Chart
Washington University in St. LouisMedia & Machines Lab
10Nigel [email protected]
A psychophysical model of adaptation
Measuring visual acuity
Washington University in St. LouisMedia & Machines Lab
11Nigel [email protected]
A psychophysical model of adaptation
The time-course of light adaptation - Rods
Washington University in St. LouisMedia & Machines Lab
12Nigel [email protected]
A psychophysical model of adaptation
The time-course of light adaptation - Cones
Washington University in St. LouisMedia & Machines Lab
13Nigel [email protected]
A psychophysical model of adaptation
The time-course of dark adaptation
Washington University in St. LouisMedia & Machines Lab
14Nigel [email protected]
Implementation
Acuity
Light Adaptation
Dark Adaptation
Washington University in St. LouisMedia & Machines Lab
15Nigel [email protected]
Results
Visual function across the range of light
Washington University in St. LouisMedia & Machines Lab
16Nigel [email protected]
Results
Image sequence showing the time-course of light adaptation
Image sequence showing the time-course of dark adaptation
Washington University in St. LouisMedia & Machines Lab
17Nigel [email protected]
Conclusion / Future Work
Computational model of the changes in the visual function that are produced by adaptation.
A more complete model of adaptation will result in advances in realistic image synthesis
