Papers by Werner Purgathofer
Ein allgemeiner graphischer Editor
Eine neue Methode in der garphischen Datenverarbeitung: Stochastisches Sampling
Eine Neue Methode in der Graphischen Datenverarbeitung: Stochastisches Sampling
Informatik Fachberichte, 1985
PASCAL, Graph: Handbuch; Lehrbuch, Benutzerhandbuch, Installationsanleitung
Methoden der Graphischen Datenverarbeitung zur Erzeugung realistischer Bilder
Konzept und Implementierung von Bilddateien in PASCAL/Graph
PASCAL, Bild: Benutzerhandbuch
Die implementierung von PASCAL/Bild
Erweiterung von Modula-2 um höhere graphische Sprachelemente
This book presents tutorial notes of the Eurographics' 89 Conference: held in Hamburg in September 1989
Efficient Realistic Image Synthesis by Parallel Monte Carlo Radiosity on
Towards Real-Time Tone Mapping
Requirements on the staff of an application oriented research organization
Post-rendering enhancement of volumes
Accelerating radiosity by overshooting
Occlusion culling methods
Proceedings of Eurographics, 2001
... 2. Visibility from region or from viewpoint Occlusion culling methods have to determine the s... more ... 2. Visibility from region or from viewpoint Occlusion culling methods have to determine the set of objects that are potentially visible (potentially visible set (PVS)) from the current viewpoint. ... 83-90 15. Pavan K. Desikan, TM Murali and Pankaj K. Agarwal. ...
Smart Graphics, Jan 1, 2004
This paper introduces a tangible user interface for browsing and retrieving images from an image ... more This paper introduces a tangible user interface for browsing and retrieving images from an image database. The basis for the query to the image database is a color layout sketch, which is used by the underlying query algorithm to find the best matches. The users are provided with colored cubes of various sizes (1.5 to 4 cm) and colors (8 base colors). The users can place and arrange the colored cubes on a small table to create a color layout sketch. Multiple users can use this interface to collaborate in an image query. To evaluate the benefits of the interface, it is compared to a traditional GUI application in which the users use a mouse to create a color layout sketch.
Lecture Notes in Computer Science, 2004
This paper introduces a tangible user interface for browsing and retrieving images from an image ... more This paper introduces a tangible user interface for browsing and retrieving images from an image database. The basis for the query to the image database is a color layout sketch, which is used by the underlying query algorithm to find the best matches. The users are provided with colored cubes of various sizes (1.5 to 4 cm) and colors (8 base colors). The users can place and arrange the colored cubes on a small table to create a color layout sketch. Multiple users can use this interface to collaborate in an image query. To evaluate the benefits of the interface, it is compared to a traditional GUI application in which the users use a mouse to create a color layout sketch.
This paper describes an accurate method to obtain the Tone Reproduction Curve (TRC) of display de... more This paper describes an accurate method to obtain the Tone Reproduction Curve (TRC) of display devices without using a measurement device. It is an improvement of an existing technique based on human observation, solving its problem of numerical instability and resulting in functions in log-log scale which correspond better to the nature of display devices. We demonstrate the effiency of our technique on different monitor technologies, comparing it with direct measurements using a spectrophotometer.
Global Multipath Monte Carlo Algorithms for Radiosity
The Visual Computer, Jan 1, 1996
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Papers by Werner Purgathofer