Method and apparatus for monitoring a passageway using 3D images
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United States of America Patent
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-
Jul 8, 2008
Grant Date -
Nov 4, 2004
app pub date -
Dec 31, 2003
filing date -
Sep 5, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A stereo imaging based vision system is calibrated to provide heights above the ground plane for any point in the field of view. Therefore, when any object enters the field of view, it generates interest points called 'features,' the heights of which are measured relative to the ground plane. These points are then clustered in 3D space to provide 'objects.' These objects are then tracked in multiple frames to provide 'trajectories.' Such a system could then control alarm signals or actuate gates or motion control devices, for example, based on the various pieces of information generated about the object.
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