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Summary: BUILDING DETECTION USING DIRECTIONAL SPATIAL CONSTRAINTS
H. G¨okhan Akc¸ay, Selim Aksoy
Department of Computer Engineering
Bilkent University
Bilkent, 06800, Ankara, Turkey
{akcay,saksoy}@cs.bilkent.edu.tr
ABSTRACT
We propose an algorithm for automatic detection of buildings
with complex shapes and roof structures in very high spatial
resolution remotely sensed images. First, an initial overseg-
mentation is obtained. Then, candidate building regions are
found using shadow and sun azimuth angle information. Fi-
nally, the building regions are selected by clustering the can-
didate regions using minimum spanning trees. The experi-
ments on Ikonos scenes show that the algorithm is able to
detect buildings with complex appearances and shapes.
Index Terms-- Building detection, segmentation, spatial
relationships, minimum spanning trees
1. INTRODUCTION
Automatic detection of buildings in very high spatial resolu-
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