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Synthesis and rendering of seamless and non-repetitive 4D texture variations for measured optical material properties

Ritz, Martin and Breitfelder, Simon and Santos, Pedro and Kuijper, Arjan and Fellner, Dieter (2018):
Synthesis and rendering of seamless and non-repetitive 4D texture variations for measured optical material properties.
In: SIGGRAPH Asia 2018 Technical Briefs on - SA '18, New York, NY, ACM, In: Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia (SIGGRAPH ASIA), Tokyo, Japan, 2018, ISBN 978-1-4503-6062-3,
DOI: 10.1145/3283254.3283284,
[Online-Edition: https://doi.org/10.1145/3283254.3283284],
[Conference or Workshop Item]

Abstract

We have lifted the one weakness of an existing fully automatic acquisition system for spatially varying optical material behavior of real object surfaces. While its expression of spatially varying material behavior with spherical dependence on incoming light as 4D texture (ABTF material model) allows flexible mapping on arbitrary 3D geometries, photo-realistic rendering and interaction in real-time, this very method of texture-like representation exposed it to common problems of texturing, striking in two levels. First, non-seamless textures create visible border artifacts. Second, even a perfectly seamless texture causes repetition artifacts due to side-by-side distribution in large numbers over the 3D surface. We solved both problems through our novel texture synthesis that generates a set of seamless texture variations randomly distributed on the surface at shading time. When compared to regular 2D textures, the inter-dimensional coherence of the 4D ABTF material model poses entirely new challenges to texture synthesis, which includes maintaining the consistency of material behavior throughout the space spanned by the spatial image domain and the angular illumination hemisphere. In addition, we tackle the increased memory consumption caused by the numerous variations through a fitting scheme specifically designed to reconstruct the most prominent effects captured in the material model.

Item Type: Conference or Workshop Item
Erschienen: 2018
Creators: Ritz, Martin and Breitfelder, Simon and Santos, Pedro and Kuijper, Arjan and Fellner, Dieter
Title: Synthesis and rendering of seamless and non-repetitive 4D texture variations for measured optical material properties
Language: English
Abstract:

We have lifted the one weakness of an existing fully automatic acquisition system for spatially varying optical material behavior of real object surfaces. While its expression of spatially varying material behavior with spherical dependence on incoming light as 4D texture (ABTF material model) allows flexible mapping on arbitrary 3D geometries, photo-realistic rendering and interaction in real-time, this very method of texture-like representation exposed it to common problems of texturing, striking in two levels. First, non-seamless textures create visible border artifacts. Second, even a perfectly seamless texture causes repetition artifacts due to side-by-side distribution in large numbers over the 3D surface. We solved both problems through our novel texture synthesis that generates a set of seamless texture variations randomly distributed on the surface at shading time. When compared to regular 2D textures, the inter-dimensional coherence of the 4D ABTF material model poses entirely new challenges to texture synthesis, which includes maintaining the consistency of material behavior throughout the space spanned by the spatial image domain and the angular illumination hemisphere. In addition, we tackle the increased memory consumption caused by the numerous variations through a fitting scheme specifically designed to reconstruct the most prominent effects captured in the material model.

Title of Book: SIGGRAPH Asia 2018 Technical Briefs on - SA '18
Place of Publication: New York, NY
Publisher: ACM
ISBN: 978-1-4503-6062-3
Uncontrolled Keywords: Texturing, Physically based simulation, Perception, Texture synthesis
Divisions: 20 Department of Computer Science
20 Department of Computer Science > Interactive Graphics Systems
20 Department of Computer Science > Mathematical and Applied Visual Computing
Event Title: Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia (SIGGRAPH ASIA)
Event Location: Tokyo, Japan
Event Dates: 2018
Date Deposited: 10 Jul 2019 08:49
DOI: 10.1145/3283254.3283284
Official URL: https://doi.org/10.1145/3283254.3283284
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