Motion
Motion is another aspect of 3-D vision that humans are able to interpret with ease. This chapter studies the basic theoretical concepts and then tackles real problems where motion is crucial, including the monitoring of traffic flow and the tracking of people.
Look out for:
• the basic concepts of optical flow and its limitations.
• the idea of a focus of expansion.
• identification of the ground plane as an early stage in the analysis of many types of scene incorporating motions.
• the need for “occlusion reasoning” when objects repeatedly pass behind one another and then reemerge.
• how serious studies of the motions of complex objects may have to take into account 3-D articulated models of linked parts.
• the important status of the ...
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