European Workshop on Advanced Mobile Robots (EUROBOT), 2001, Lund (Suecia) ; This work presents an evaluation of three color constancy techniques applied to a landmark detection system designed for a walking robot, which has to operate in unknown and unstructured outdoor environments. The first technique is the well-known image conversion to a chromaticity space, and the second technique is based on successive lighting intensity and illuminant color normalizations. Based on a differential model of color constancy, we propose the third technique, based on color ratios, which unifies the processes of color constancy and landmark detection. The approach used to detect potential landmarks, which is common to all evaluated systems, is based on visual saliency concepts using multiscale color opponent features to identify salient regions in the images. These regions are selected as landmark candidates, and they are further characterized by their features for identification and recognition. ; This work was supported by the project 'Navegación autónoma de robots guiados por objetivos visuales' (070-720). ; Peer Reviewed
Color constancy for landmark detection in outdoor environments
2001-01-01
Conference paper
Electronic Resource
English
DDC: | 629 |
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