1,721,234 research outputs found
Special issue: Selected papers from the 2nd European Conference on Mobile Robots (ECMR '05)
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Fondamenti di Computer Graphics
No full textIl volume è rivolto a tutti coloro che si apprestano ad utilizzare programmi di grafica, pur non disponendo di una grande conoscenza dei principi fondamentali della CG, ovvero la terminologia, le schematizzazioni e le operazioni basilari con relativi esempi di algoritmi. In particolare, allo stato attuale, questo è il caso della quasi totalità degli studenti del corso di Informatica Grafica della Laurea quinquennale, a riconoscimento europeo, di Ingegneria Edile-Architettura (per di più, tali studenti si trovano presto a dover usare software applicativi di grafica vettoriale e raster, ad esempio Rhinoceros, 3DstudioMax, Autocad e Photoshop, avendo spesso soltanto il suddetto corso come preparazione)
Landmark matching in a varying environment
No full textA system for landmark tracking by a template matching approach is described. Route following based on landmarks may require many models to cover all different situations, so a genetic algorithm learning technique is used to adapt modelling parameters to environmental conditions (lighting, shadows, reflexes, etc.) during the tracking. In addition, the mobile robot self-localization is obtained by a stereo approach that uses the centres of matching in the two images to solve in a simple way the correspondence analysis in the 3-D position estimation. The experimental results show that the tracking robustness is improved when the adaptive template matching is used for landmark tracking
An efficient similarity metric for omnidirectional vision sensors
No full textThis paper presents an efficient metric for the computation of the similarity among omnidirectional images (image matching). The representation of image appearance is based on feature vectors that include both the chromatic attributes of color sets and their mutual spatial relationships. The proposed metric fits well to robotic navigation using omnidirectional vision sensors, because it has very important properties: it is reflexive, compositional and invariant with respect to image scaling and rotation. The robustness of the metric was repeatedly tested using omnidirectional images for a robot localization task in a real indoor environment
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