US 11,144,739 B1 · Method to eliminate RFID cross reads for RFID point of sale scanners using imager object tracking

Abstract

Techniques for eliminating RFID cross-reads for RFID point of sale scanners using imager object tracking are disclosed herein. An example method includes measuring, by an imager a series of displacements of an object from a center of the field of view (FOV) of the imager, over a timeframe; measuring, by an RFID reader, a series of received signal strengths for an RFID tag over the same timeframe; comparing the series of displacements to the series of received signal strengths over the timeframe to determine a measure of similarity between the series of displacements of the object from the center of the FOV of the imager and the series of received signal strengths for the RFID tag over the timeframe; and responsive to the measure of similarity exceeding a threshold measure of similarity, adding a record associated with the RFID tag to a transaction log.

Claims10

Dependent claims

A method, comprising:

measuring, by an imager, a series of displacements of an object passing through a field of view (FOV) of the imager, from a center of the FOV of the imager, over a timeframe, the FOV of the imager including a product-scanning region;
measuring, by a radio-frequency identification (RFID) reader, a series of received signal strengths for an RFID tag over the same timeframe;
comparing the series of displacements of the object from the center of the FOV of the imager over the timeframe to the series of received signal strengths for the RFID tag over the timeframe to determine a measure of similarity between the series of displacements of the object from the center of the FOV of the imager over the timeframe and the series of received signal strengths for the RFID tag over the timeframe;
and
responsive to the measure of similarity exceeding a threshold measure of similarity, adding a record associated with the RFID tag to a transaction log.

2 more elements

An apparatus including:

an imager configured to measure a series of displacements of one or more objects passing through a field of view (FOV) of the imager, from a center of the FOV of the imager, over a timeframe, the FOV of the imager including a product-scanning region;
a radio-frequency identification (RFID) reader configured to measure a series of received signal strengths for an RFID tag over the same timeframe;
a memory storing computer-readable instructions;
and
a processor configured to execute the computer-readable instructions stored on the memory to:
compare the series of displacements of the object from the center of the FOV of the imager over the timeframe to the series of received signal strengths for the RFID tag over the timeframe to determine a measure of similarity between the series of displacements of the object from the center of the FOV of the imager over the timeframe and the series of received signal strengths for the RFID tag over the timeframe;
and
responsive to the measure of similarity exceeding a threshold measure of similarity, adding a record associated with the RFID tag to a transaction log.

5 more elements

Dependencies are inferred from the claim text.

Method to eliminate RFID cross reads for RFID point of sale scanners using imager object tracking

Life of this patent

Method to eliminate RFID cross reads for RFID point of sale scanners using imager object tracking

Life of this patent

Abstract

Claims10