Information
- Publication Type: Journal Paper (without talk)
- Workgroup(s)/Project(s):
- Date: March 2007
- ISSN: 0167-7055
- Journal: Computer Graphics Forum
- Number: 1
- Pages (from): 46
- Pages (to): 49
- Volume: 26
- Keywords: popping, LOD switching, levels of detail, real-time rendering
Abstract
This paper presents a new, simple and practical algorithm to avoid artifacts when switching between discrete levels of detail (LOD) by smoothly blending LOD representations in image space. We analyze the alternatives of conventional alpha-blending and so-called late-switching (the switching of LODs markusquote{far enough} from the eye-point), widely thought to solve the LOD switching discontinuity problem, and conclude that they either do not work in practice, or defeat the concept of LODs. In contrast we show that our algorithm produces visually pleasing blends for static and animated discrete LODs, for discrete LODs with different types of LOD representations (e.g. billboards and meshes) and even to some extent totally different objects with similar spatial extent, with a very small runtime overhead.
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BibTeX
@article{GIEGL-2007-UNP,
title = "Unpopping: Solving the Image-Space Blend Problem for Smooth
Discrete LOD Transitions",
author = "Markus Giegl and Michael Wimmer",
year = "2007",
abstract = "This paper presents a new, simple and practical algorithm to
avoid artifacts when switching between discrete levels of
detail (LOD) by smoothly blending LOD representations in
image space. We analyze the alternatives of conventional
alpha-blending and so-called late-switching (the switching
of LODs markusquote{far enough} from the eye-point), widely
thought to solve the LOD switching discontinuity problem,
and conclude that they either do not work in practice, or
defeat the concept of LODs. In contrast we show that our
algorithm produces visually pleasing blends for static and
animated discrete LODs, for discrete LODs with different
types of LOD representations (e.g. billboards and meshes)
and even to some extent totally different objects with
similar spatial extent, with a very small runtime overhead.",
month = mar,
issn = "0167-7055",
journal = "Computer Graphics Forum",
number = "1",
volume = "26",
pages = "46--49",
keywords = "popping, LOD switching, levels of detail, real-time
rendering",
URL = "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-UNP/",
}