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- Emil Praun, Hugues Hoppe
- ACM Trans. Graph.
- 2003

The traditional approach for parametrizing a surface involves cutting it into charts and mapping these piecewise onto a planar domain. We introduce a robust technique for directly parametrizing a genus-zero surface onto a spherical domain. A key ingredient for making such a parametrization practical is the minimization of a stretch-based measure, to reduce… (More)

- John Schreiner, Arul Asirvatham, Emil Praun, Hugues Hoppe
- ACM Trans. Graph.
- 2004

We consider the problem of creating a map between two arbitrary triangle meshes. Whereas previous approaches compose parametrizations over a simpler intermediate domain, we directly create and optimize a continuous map between the meshes. Map distortion is measured with a new symmetric metric, and is minimized during interleaved coarse-to-fine refinement of… (More)

- Emil Praun, Adam Finkelstein, Hugues Hoppe
- SIGGRAPH
- 2000

We present for creating texture over an surface mesh using an example 2D texture. The approach is to identify interesting regions (<italic>texture patches</italic>) in the 2D example, and to repeatedly paste them onto the surface until it is completely covered. We call such a collection of overlapping patches a <italic>lapped texture</italic>. It is… (More)

- Emil Praun, Hugues Hoppe, Matthew Webb, Adam Finkelstein
- SIGGRAPH
- 2001

Drawing surfaces using hatching strokes simultaneously conveys material, tone, and form. We present a real-time system for non-photorealistic rendering of hatching strokes over arbitrary surfaces. During an automatic preprocess, we construct a sequence of mipmapped hatch images corresponding to different tones, collectively called a <i>tonal art map</i>.… (More)

- Emil Praun, Wim Sweldens, Peter Schröder
- SIGGRAPH
- 2001

A basic element of Digital Geometry Processing algorithms is the establishment of a smooth parameterization for a given model. In this paper we propose an algorithm which establishes parameterizations for a set of models. The parameterizations are called consistent because they share the same base domain and respect features. They give immediate… (More)

- Emil Praun, Hugues Hoppe, Adam Finkelstein
- SIGGRAPH
- 1999

We describe a robust method for watermarking triangle meshes. Watermarking provides a mechanism for copyright protection of digital media by embedding information identifying the owner in the data. The bulk of the research on digital watermarks has focused on media such as images, video, audio, and text. Robust watermarks must be able to survive a variety… (More)

- Hugues Hoppe, Emil Praun
- Advances in Multiresolution for Geometric…
- 2005

We recently introduced an algorithm for spherical parametrization and remeshing, which allows resampling of a genus-zero surface onto a regular 2D grid, a spherical geometry image. These geometry images offer several advantages for shape compression. First, simple extension rules extend the square image domain to cover the infinite plane, thereby providing… (More)

- Jed Lengyel, Emil Praun, Adam Finkelstein, Hugues Hoppe
- SI3D
- 2001

We introduce a method for real-time rendering of fur on surfaces of arbitrary topology. As a pre-process, we simulate virtual hair with a particle system, and sample it into a volume texture. Next, we parameterize the texture over a surface of arbitrary topology using “lapped textures” — an approach for applying a sample texture to a surface by repeatedly… (More)

- Joe Michael Kniss, Simon Premoze, Milan Ikits, Aaron E. Lefohn, Charles D. Hansen, Emil Praun
- IEEE Visualization
- 2003

Volume rendering is a flexible technique for visualizing dense 3D volumetric datasets. A central element of volume rendering is the conversion between data values and observable quantities such as color and opacity. This process is usually realized through the use of transfer functions that are precomputed and stored in lookup tables. For multidimensional… (More)

- Kai Li, Han Chen, +15 authors Jiannan Zheng
- IEEE Computer Graphics and Applications
- 2000

IEEE Computer Graphics and Applications 29 Princeton’s Scalable Display Wall project explores building and using a large-format display with multiple commodity components. The prototype system has been operational since March 1998. Our goal is to construct a collaborative space that fully exploits a large-format display system with immersive sound and… (More)