@article {3471, title = {Robust Vision-Based Localization using Combinations of Local Feature Regions Detectors}, journal = {Autonomous Robots Journal}, volume = {27}, year = {2009}, pages = {373-385}, chapter = {373}, abstract = {This paper presents a vision-based approach for mobile robot localization. The model of the environment is topological. The new approach characterize a place using a signature. This signature consists of a constellation of descriptors computed over di erent types of local affine covariant regions extracted from an omnidirectional image acquired rotating a standard camera with a pan-tilt unit. This type of representation permits a reliable and distinctive environment modeling. Our objectives were to validate the proposed method in indoor environments and, also, to nd out if the combination of complementary local feature region detectors improves the localization versus using a single region detector. Our experimental results show that if false matches are efectively rejected, the combination of di erent covariant affine region detectors increases notably the performance of the approach by combining the di erent strengths of the individual detectors. In order to reduce the localization time, two strategies are evaluated}, author = {Arnau Ramisa and Adriana Tapus and David Aldavert and Ricardo Toledo and Ramon L{\'o}pez de M{\'a}ntaras} }