Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2005-10-04
2005-10-04
Philippe, Gims (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C382S236000, C348S143000
Reexamination Certificate
active
06952449
ABSTRACT:
Road area blocks of monitoring camera video data are extracted by a road area block extractor, and motion vectors are calculated by a motion vector calculator. A motion vector direction detector detects the directions of the motion vectors. In a normal state, the mean value Θ and the variance σe2of the directions θ of the motion vectors are calculated and accumulated in a statistics memory. In detection of road obstructions, the directions of the motion vectors detected by the motion vector direction detector are transmitted to an abnormal motion vector degree Q calculator. An abnormal motion vector degree Q is calculated on the basis of the statistics accumulated in the statistics accumulated in the statistics memory. A comparator compares the abnormal motion vector degree Q with a threshold. When the abnormal motion vector degree Q is equal to or larger than the threshold, road obstructions are decided. Therefore, according to the present invention, a detection apparatus for road obstructions which is not easily affected by changes in brightness and color in an image and which is not easily adversely affected by the color of a running vehicle is provided.
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Japanese Office Action dated Apr. 27, 2005.
Kawada Ryoichi
Matsumoto Shuichi
Wada Masahiro
KDDI Corporation
Philippe Gims
Westerman Hattori Daniels & Adrian LLP
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