Method and apparatus for object tracking and recognition
First Claim
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1. An object tracking and recognition system comprising:
- a coordinate and image model for obtaining coordinates and image information for a detection range;
a RFID device for detecting the strength of a RF signal transmitted by an object entering the detection range;
a video device controlled to turn on and obtain image information of the object in response to the strength of the RF signal detected by the RFID device reaching a threshold indicating the object is within the detection range and within a distance from the video device;
an information generator for receiving the coordinates from the coordinate and image model and mapping a location of the object to identify a position of the object within the detection range;
a coordinate generator for receiving the coordinates from the coordinate and image model to detect the distance of the object to the video device; and
a processor for updating the threshold as a function of a relationship model of strength values of the RF signal of at least two locations in the detection range of the video device, wherein the relationship model is a linear matrix model of signal strength between the regions in the detection range and the threshold is updated by a single or multiple point estimation method based on the relationship model.
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Abstract
An object tracking and recognition system are provided and comprise a video device for getting the image information of an object in the detection range of the object tracking and recognition system; and a radio frequency identification (RFID) device for detecting signal strength of a radio frequency (RF) tag of the object; wherein the video device is turned on to get the image information of the object upon the detected signal strength reaching a predetermined signal strength threshold.
11 Citations
8 Claims
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1. An object tracking and recognition system comprising:
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a coordinate and image model for obtaining coordinates and image information for a detection range; a RFID device for detecting the strength of a RF signal transmitted by an object entering the detection range; a video device controlled to turn on and obtain image information of the object in response to the strength of the RF signal detected by the RFID device reaching a threshold indicating the object is within the detection range and within a distance from the video device; an information generator for receiving the coordinates from the coordinate and image model and mapping a location of the object to identify a position of the object within the detection range; a coordinate generator for receiving the coordinates from the coordinate and image model to detect the distance of the object to the video device; and a processor for updating the threshold as a function of a relationship model of strength values of the RF signal of at least two locations in the detection range of the video device, wherein the relationship model is a linear matrix model of signal strength between the regions in the detection range and the threshold is updated by a single or multiple point estimation method based on the relationship model. - View Dependent Claims (2, 3, 4)
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5. A method used in an object tracking and recognition system comprising:
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obtaining coordinates and image information for a detection range of the object tracking and recognition system and image information of an object entering the detection range; mapping a location of the object to identify a position of the object within the detection range based on the obtained coordinates; detecting a distance of the object to the video device based on the obtained coordinates; detecting, by a RFID device, signal strength of a RF tag of the object; turning on a video device to obtain the image information of the object upon the detected signal strength of the signal detected by the RFID device reaching a signal strength threshold indicating the object is within the detection range; and updating the signal strength threshold for subsequent use in turning on the video device as a function of a relationship model of values of the strength of the RF tag of at least two locations in the detection range of the video device, wherein the relationship model is a linear matrix model of signal strength between the regions in the detection range and the threshold is updated by a single or multiple point estimation method based on the relationship model. - View Dependent Claims (6, 7, 8)
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Specification