A Hybrid Approach to Finding Cycles in Hybrid Maps
Margaret E. Jefferies, Wenrong Weng, Jesse T. Baker, Michael C. Cosgrove, Michael L. Mayo · 2003
One of the most difficult problems in Simultaneous Localisation and Mapping (SLAM) is that of identifying and closing cycles. While localisation methods exist that can provide local consistency in a map, residual errors can grow unbounded in global metric maps. Topological maps are favoured by some because they do not have the global consistency problems however they too have difficult correspondence problems due to perceptual aliasing. In this paper we discuss our approach to closing cycles in a topological map. We use both a global metric map and the topological map itself to identify cycles in the topological map.