Traffic monitoring device and method
First Claim
1. A traffic monitoring device comprising:
- a picture recording unit provided for recording a sequence of successive traffic pictures of a same traffic road;
a detection zone determination unit connected with the picture recording unit and provided for determining a traffic detection zone within the traffic pictures of said sequence by superposing on said traffic picture a follower axis, comprising a predetermined number of points (Xi) distributed thereover, said follower axis being situated within and extending substantially in parallel with a traffic axis within said traffic road; and
a picture analysis unit provided for cooperating with the picture recording unit and the detection zone determination unit and for determining on a grey value of at least two of said successive points (Xi) within each supplied traffic picture and for verifying if said grey value exceeds a predetermined threshold on said at least two successive points of said follower axis and for assigning to said points for which said grey value exceeds said threshold an identification pattern, said picture analysis unit being also provided for checking within subsequent traffic pictures of said sequence if said identification pattern is again assigned to at least two points.
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Accused Products
Abstract
A traffic monitoring device comprising a picture recording unit, a traffic dectection zone determination unit and a picture analysis unit, the traffic detection zone determination unit of which being provided to determine as traffic detection zone a follower axis extending substantially in parallel with a traffic axis in said traffic road and situated thereon, and in that said picture analysis unit is further provided to realize said verification pointwise on predetermined points situated on said follower axis and upon detection of such an object to assign thereon an identification pattern and to check within subsequent pictures within said sequence if patterns corresponding with said identification pattern occur.
23 Citations
15 Claims
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1. A traffic monitoring device comprising:
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a picture recording unit provided for recording a sequence of successive traffic pictures of a same traffic road; a detection zone determination unit connected with the picture recording unit and provided for determining a traffic detection zone within the traffic pictures of said sequence by superposing on said traffic picture a follower axis, comprising a predetermined number of points (Xi) distributed thereover, said follower axis being situated within and extending substantially in parallel with a traffic axis within said traffic road; and a picture analysis unit provided for cooperating with the picture recording unit and the detection zone determination unit and for determining on a grey value of at least two of said successive points (Xi) within each supplied traffic picture and for verifying if said grey value exceeds a predetermined threshold on said at least two successive points of said follower axis and for assigning to said points for which said grey value exceeds said threshold an identification pattern, said picture analysis unit being also provided for checking within subsequent traffic pictures of said sequence if said identification pattern is again assigned to at least two points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for monitoring traffic present on a traffic road, wherein a sequence of subsequent traffic pictures of the traffic road is recorded, and in the traffic pictures a traffic detection zone is determined, and wherein from the recorded traffic pictures there is verified within the traffic detection zone if an object to be identified as a vehicle is present therein, characterized in that for the traffic detection zone a follower axis is superposed on said traffic picture, which follower axis comprises a predetermined number of points (Xi ) distributed thereover and which is situated within and extends substantially in parallel with a traffic axis within said traffic road, and in that said verification is executed pointwise on said points situated on said follower axis by verifying if a predetermined grey value threshold is exceeded by the grey value of that point and upon detection of such an object an identification pattern is assigned thereon and from subsequent traffic pictures within said sequence there is verified if patterns corresponding with said identification pattern appear on points of said follower axis.
Specification