Stereo door sensor
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United States of America Patent
Stats
-
Jul 15, 2008
Grant Date -
Mar 11, 2004
app pub date -
Mar 14, 2003
filing date -
Sep 5, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A stereo imaging based vision system to monitor the area on the two sides of either a door and control door motion according to the motion of 3D objects in the viewing area. The system 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 the door motion (open, close, stall) based on the various pieces of information generated about the object.
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