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Wavelet Analysis for a New Multiresolution Model for Large-Scale Textured Terrains

Summary: Wavelet Analysis for a New Multiresolution Model
for Large-Scale Textured Terrains
María José Abásolo Francisco J. Perales
Graphics and Vision Unit ­ Department of Mathematics & Computer Vision
University of the Balearic Islands
Cra. De Valldemossa km 7.5 (07001) Palma, Spain
Large terrain databases require a great number of polygons and textures. In consequence, transmission of terrain
data over slow networks is still worrying. Multiresolution models allow progressive transmission, that is, the
transmission of a simple model followed by successive refinements. In this work we describe a new multiresolution
model called Geometric-Textured Bitree (GTB) that enables progressive transmission of both geometry and
textures of a terrain model. Wavelet Multiresolution Analysis is applied in different steps of the process: selection
of geometric points, texture classification and segmentation. An innovative texture synthesis process based on
Wavelet classification is used in the reconstruction of the texture model.
Progressive Transmission, Quadtree Triangulation, Multiresolution Model, Multiresolution Analysis, Wavelets,
Texture Classification and Segmentation, Texture synthesis
Multiresolution models provide different Level-Of-


Source: Abásolo, María José - Departament de Ciències Matemàtiques i Informàtica, Universitat de les Illes Balears
Illes Balears, Universitat de les - Departament de Ciències Matemàtiques i Informàtica, Unidad de Gráficos y Visión por Ordenador e Inteligencia Artificial


Collections: Computer Technologies and Information Sciences