1995 | OriginalPaper | Chapter
Mid-Level Vision Processes for Automatic Building Extraction
Author : Wolfgang Förstner
Published in: Automatic Extraction of Man-Made Objects from Aerial and Space Images
Publisher: Birkhäuser Basel
Included in: Professional Book Archive
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Mid-level processes in vision are understood to produce structured descriptions of images without relying on very specific semantic scene knowledge. Automatic building extraction can use geometric models to a large extent. Geometric hypotheses may be inferred from the given data in 2D or 3D and represent elementary constraints as incidence or collinearity or more specific relations as symmetries. The inferred hypothesis may lead to difficulties during spatial inference due to noise and to inconsistent and mutually dependent constraints. The paper discusses the selection of mutually not-contradicting constraints via robust estimation and the selection of a set of independent constraints as a prerequisite for an optimal estimation of the objects shape. Examples from the analysis of image and range data are given.