Patent Publication Number: US-6987451-B2

Title: Surveillance system with identification correlation

Description:
RELATED APPLICATION 
     This application claims the benefit of U.S. Provisional Application No. 60/430,468, filed Dec. 3, 2002. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates video surveillance system and radio frequency identification (RF-ID) filtering and, more particularly, to tracking movement and location of objects using video surveillance and RF-ID filtering systems. 
     BACKGROUND OF THE INVENTION 
     Currently, surveillance and security systems using radio frequency identification (RF-ID) tags or other radio frequency (RF) tracking systems can track the movement and location of objects and people that are wearing the tags within the margin or error for the device. However, these systems have no means of tracking people or objects that are not wearing the RF tracking tags. Similarly, some sophisticated video surveillance systems can detect and monitor the movement and location of objects within a given area. However, these video surveillance systems require a human interface to determine if the object or person should or should not be in a specific area. It would be desirable to resolve these problems of monitoring an area with video surveillance and determining if an object or person is authorized to be in that area. 
     SUMMARY OF THE INVENTION 
     The present invention provides a system for monitoring an area with surveillance system and determining if a person or object is authorized to be in that area by correlating the location of objects being tracked by the surveillance system, such as, but not limited to digital, non-digital and infra-red video, with those of a tracking system, such as a RF tracking system or similar devices like, but not limited to, a GPS and radio signal transceiver system. The system outputs a list of objects that are being monitored within a given area by the surveillance systems, and whether or not these objects are associated with the tracking tags, such as a RF tracking tag, being tracked by the monitoring and tracking systems. The system can then notify the system operator of an unauthorized object or person within a given area. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Further features and details of the present invention will be apparent with reference to the following description and drawings. 
         FIG. 1  is a block diagram of an embodiment of the invention; and 
         FIG. 2  is a diagram of a video surveillance system and a tracking system using an embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     As shown in  FIG. 1 , the system takes geo-spatial location information on multiple objects being provided by several different position location or tracking systems and surveillance systems and compares that information in relation to time and space to determine if each of the input systems is referring to the same target. Given that these position location systems and surveillance systems are able to locate and track an object within a given margin of error (e.g., plus or minus a certain distance), the system applies a logic algorithm to determine if each system is referring to the same object. 
     The resulting system output is a list of objects within the surveillance area, and whether or not each object is associated with a tracking tag, such as a RF tracking tag. The system identifies a multiple of objects, independently, within the designated area. The system also determines whether or not the tracking tag is authorized to be within that area. 
     The system may be connected to a number of surveillance systems or position locating systems that each independently generating location information on a number of different targets. These inputs can be provided from a number of different location collection devices, such as tracking systems, security cameras and surveillance systems. Surveillance systems include, but are not limited to digital, non-digital and infra-red video. Tracking systems include, RF tracking systems and similar devices like, but not limited to, GPS and radio signal transceiver systems. 
     The input to the system are geo-spatial location information in a variety of different forms (e.g., x and y coordinates, latitude and longitude, map grid reference, etc.), as well as a time stamp as to when the object was in a particular location. The input to the system is from a database or map that the surveillance system is using to track the location of a number of different objects within the area under surveillance. 
     The system takes the target information from each of the different systems and compares them to determine if they are referencing the same target. This comparison is done in relation to time and the relative position of the target. Due to the margin of error associated with the target positions for each of the inputting systems, the system uses a logic algorithm to determine if the inputting systems are referring to the same target. The system also determines if there are objects being detected by some inputting systems that are not being detected by other systems and flags these objects as requiring an operator&#39;s attention or an alarm may be given by sound, light, or other means by the system to notify the operator. 
     The invention may be used with both an object with an authorized tracking tag or an object without a tracking tag. As shown in  FIG. 2 , an embodiment of the invention is connected to a video surveillance system and a RFID, RTLS, or RF tracking system Both the video surveillance and RF tracking systems are capable of determining the location of objects within the area under surveillance and the time at which the object was in that location. However, both of these types of object tracking have inherent limitations. The video surveillance system requires a human interface to determine if the object or person should or should not be in a specific area, and the RF tracking system has no means of tracking objects that are not wearing the RF tracking tags. 
     In the first case, an object with a RF tracking tag that is authorized to be in the area enters the surveillance area. The RF tracking system detects the card, its location, and the time at which that location was determined. This tracking system information is provided to the system. At the same time, the video surveillance system detects the object and its location. This surveillance system information along with the time at which the object was at that location is provided to the system. The system takes these two pieces of information and determines the objects being detected by both systems are the same object and whether the object is authorized to be in that area. 
     In the second case, an object without a RF tracking tag enters the surveillance area. Because the object does not have a RF tracking tag, the RF tracking system does not detect it. The video surveillance system detects the object and passes the location and time the object was at that location to the system The system then determines that the object being detected by the video surveillance system is not associated with any of the RF tracking tags being tracked by the RF tracking system. The system then determines that object is not being authorized to be in that area. The object is flagged as requiring an operator&#39;s attention or an alarm may be given by sound, light, or other means by the system to notify the operator that the object is not authorized to be in the area. 
     Theft of a tracking tag or a badge, such as a RF-ID badge, is also prevented by timely user verification. At a designated time or location, each RF-ID badge user must identify themselves biometrically, such as by voice or fingerprint input. If such identification time or location is not completed by the user, a notification with the security system occurs to notify the operator, or an alarm may be given by sound, light, or other means by the system The designated time may be, for example, hourly, daily, such as at the beginning or ending of a worker&#39;s shift, or a predetermined time during the day. 
     The system is not tied to one specific input device such as a RF tracking system or a video surveillance. It can be used to compare objects being tracked by a number of different systems to determine which of the objects being tracked are the same and which are not. 
     While the invention has been described with reference to a specific embodiment, various changes may be made and equivalents may be substituted for elements thereof by those skilled in the art without departing from the scope of the invention. In addition, other modifications may be made to adapt a particular situation or method to the teachings of the invention without departing from the essential scope thereof.