Control of spatial and temporal fidelity with adaptive sampling

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Publication Type dissertation
School or College College of Engineering
Department Computer Science
Author Stephens, Abraham J.
Title Control of spatial and temporal fidelity with adaptive sampling
Date 2011-05
Description Balancing the trade off between the spatial and temporal quality of interactive computer graphics imagery is one of the fundamental design challenges in the construction of rendering systems. Inexpensive interactive rendering hardware may deliver a high level of temporal performance if the level of spatial image quality is sufficiently constrained. In these cases, the spatial fidelity level is an independent parameter of the system and temporal performance is a dependent variable. The spatial quality parameter is selected for the system by the designer based on the anticipated graphics workload. Interactive ray tracing is one example; the algorithm is often selected due to its ability to deliver a high level of spatial fidelity, and the relatively lower level of temporal performance isreadily accepted. This dissertation proposes an algorithm to perform fine-grained adjustments to the trade off between the spatial quality of images produced by an interactive renderer, and the temporal performance or quality of the rendered image sequence. The approach first determines the minimum amount of sampling work necessary to achieve a certain fidelity level, and then allows the surplus capacity to be directed towards spatial or temporal fidelity improvement. The algorithm consists of an efficient parallel spatial and temporal adaptive rendering mechanism and a control optimization problem which adjusts the sampling rate based on a characterization of the rendered imagery and constraints on the capacity of the rendering system.
Type Text
Publisher University of Utah
Subject Interactive computer graphics; Adaptive; Fidelity; Framelet; Graphics; Rendering; Spatiotemporal; Temporal fidelity; Spatial fidelity
Dissertation Institution University of Utah
Dissertation Name Doctor of Philosophy
Language eng
Rights Management Copyright © Abraham J. Stephens 2011
Format Medium application/pdf
Format Extent 57,238,640 bytes
Identifier us-etd3,30615
Source Original housed in Marriott Library Special Collections, T7.5 2011 .S84
ARK ark:/87278/s66404gp
Setname ir_etd
Date Created 2012-04-24
Date Modified 2018-03-27
ID 194347
Reference URL