Simulating the visual experience of very bright and very dark scenes using afterimages and mesopic effects
- The human visual system can operate in a wide range of illumination levels, due to several adaptation processes working in concert. For the most part, these adaptation mechanisms are transparent, leaving the observer unaware of his or her absolute adaptation state. At extreme illumination levels, however, some of these mechanisms produce perceivable secondary effects, or epiphenomena. In bright light, these include bleaching afterimages and adaptation afterimages, while in dark conditions these include desaturation, loss of acuity, mesopic hue shift, and the Purkinje effect. In this work we examine whether simulating and displaying these effects explicitly can be used to extend the apparent dynamic range of a conventional computer display. We present phenomenological models for each effect, we describe efficient computer graphics methods for rendering our models, and we propose a gaze-adaptive display system that injects the effects into imagery on a standard computer monitor. Finally, we report the results of psychophysical experiments, which reveal that while mesopic epiphenomena are a strong cue that a stimulus is very dark, afterimages have little impact on perception that a stimulus is very bright.
|Type of resource
|electronic; electronic resource; remote
|1 online resource.
|Jacobs, David E
|Stanford University, Department of Computer Science.
|Statement of responsibility
|David E. Jacobs.
|Submitted to the Department of Computer Science.
|Thesis (Ph.D.)--Stanford University, 2014.
- © 2014 by David Edward Jacobs
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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