Prof. Dr. Jürgen Döllner


Approaches to Image Abstraction for Photorealistic Depictions of Virtual 3D Models

Döllner, Jürgen; Kyprianidis, Jan Eric in Proceedings of the First ICA Symposium for Central and Eastern Europe 2009 Gartner, Georg; Ortag, Felix ( Hrsg. ), Seite 371--385 . Vienna University of Technology , 2009 .

In our contribution, we present approaches of automatic image abstraction, applied to images and image sequences derived as views of virtual 3D city models and landscape models. We first discuss the requirements of cartography-specific visualization based on the virtual globe metaphor as well as the specific characteristics and deficiencies of visualization based on photorealism. We introduce a concept that extends the classical visualization pipeline by cartography-specific functionality, object-space and image-space abstraction, which also represent the two principle ways for implementing cartographic visualization systems. Abstraction provides the prerequisites to visually communicate uncertainty, to simplify and filter detailed elements, and to clearly encode displayed information of complex geospatial information. In addition, it offers many degrees of freedoms for artistic and stylistic design of cartographic products. Furthermore, we outline general working principles and implementation of an automatic image-space abstraction technique we developed that creates high-quality, simplified, stylistic illustrations from color images, videos, and 3D renderings.
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Herausgeber Gartner, Georg; Ortag, Felix
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