Image analysis – Applications – Vehicle or traffic control
Patent
1999-03-11
2000-06-13
Johns, Andrew W.
Image analysis
Applications
Vehicle or traffic control
340934, 348149, G06K 900
Patent
active
060758740
ABSTRACT:
The present invention measures traffic congestion by utilizing a video camera to capture images of vehicles travelling on a road and analyzing sample points that are assigned to different aspects of the images. For example, presence and movement sample points correspond to the expected location and motion of the vehicles respectively. The sample points adjacent to one another form either movement or congestion blocks. The blocks that have a ratio of movement sample points to all other sample points within the block greater than a predetermined level are movement blocks. The remaining presence sample points in the images signify congestion sample points and form congestion blocks. Congestion blocks have a ratio of congestion sample points to all other sample points within the block greater than a predetermined level. Therefore, the state of traffic congestion is measured based upon the resultant movement and congestion blocks.
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English translation of International Preliminary Examination Report from WIPO.
Higashikubo Masakatsu
Ito Yoshiyuki
Johns Andrew W.
Sumitomo Electric Industries Ltd.
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