Extraction of qualitative information from the weighted walkthroughs Serafino Cicerone and Eliseo Clementini   View Paper (PDF)   Return to Raster data, data structures and computational geometry Abstract Weighted walkthroughs are a quantitative model for representing the spatial relation between two raster features in image databases. In this paper, we establish a correspondence between the weighted walkthroughs and qualitative models for spatial reasoning. We provide rules for extracting topological relations from the quantitative data that are computed for each pair of pixel sets. The approach has been tested through experiments with raster regions. DiSC'03 © 2003 Association for Computing Machinery