Image-Based Change Detection of Areal Objects Using Differential Snakes Sotirios Gyftakis, Peggy Agouris, and Anthony Stefanidis   View Paper (PDF)   Return to Session 4: Data Structures, Computational Geometry Abstract Change detection is an important issue for modern geospatial information systems. In this paper we address change detection of areal objects (i.e. objects with closed-curve outlines). We specifically focus on the detection of movement (translation and rotation) and/or deformation of such objects using aerial imagery. The innovative approach we present in this paper combines geometric analysis with our model of differential snakes to support change detection. Geometric analysis proceeds by compar ... ©2006 Association for Computing Machinery