SYSTEM AND METHOD FOR VIDEO SIGNAL SENSING USING TRAFFIC ENFORCEMENT CAMERAS
First Claim
1. A system for determining an active state of a traffic signal head comprising:
- a signal camera adapted to obtain an image of the traffic signal head;
an RGB conversion processing unit adapted to convert the image of the traffic signal head into red, green and blue sub-images; and
a state determination processing unit adapted to select a maximum probability state of the traffic light, having a maximum combined probability based on a plurality of imaging factors, to represent the active state of the traffic signal head.
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Accused Products
Abstract
A system and method for determining the state of a traffic signal light, such as being red, yellow, or green, by employing a plurality of traffic enforcement cameras to be used in determining if a traffic violation has occurred. The system and method automatically predicts, tacks and captures violation events, such as violating a red traffic signal light, to use the video for any number of reasons, particularly for traffic enforcement purposes. There may be provided a tracking camera, a signal camera and an enforcement camera used to capture the video and other pertinent information relating to the event. The signal camera may be operatively connected to a processing unit that runs a video signal sensing (VSS) software unit to determine the active state of the system. Advantageously, this allows the monitoring of intersection for signal light violations without the need for a connection to the light itself.
52 Citations
20 Claims
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1. A system for determining an active state of a traffic signal head comprising:
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a signal camera adapted to obtain an image of the traffic signal head; an RGB conversion processing unit adapted to convert the image of the traffic signal head into red, green and blue sub-images; and a state determination processing unit adapted to select a maximum probability state of the traffic light, having a maximum combined probability based on a plurality of imaging factors, to represent the active state of the traffic signal head. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for determining a state of the traffic signal head, the traffic signal head comprising a plurality of signal discs that represent an active state of the traffic signal head, the method comprising:
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obtaining an image of the traffic signal head from a signal sensing traffic enforcement camera; converting the image of the traffic signal head into a plurality of sub-images; and selecting a maximum combined probability state, having a maximum combined probability based on a plurality of imaging factors, as the active state of the traffic signal head. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A system for detecting a violation of a traffic signal light comprising:
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a tracking camera system that monitors at least one vehicle as the at least one vehicle approaches an intersection, including a tracking process that views and images the at least one vehicle as it enters the intersection, wherein the tracking process is constructed and arranged to determine if the violation has occurred, and in response to the violation occurrence, captures tracking images of the violation; a signal camera system that obtains a signal image of the traffic signal light, wherein the signal camera is operatively connected to a processing unit that includes a video signal-sensing process to determine a state of the traffic signal light; and an enforcement camera system that obtains at least one enforcement image, the at least one enforcement image containing an image of a license plate of the at least one vehicle. - View Dependent Claims (17, 18, 19, 20)
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Specification