Patent ID: 11887337
Assignee: 7-ELEVEN, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. An object tracking method, comprising:
receiving a first (x,y) coordinate within a space for a sensor from a position sensor, wherein:
the first (x,y) coordinate corresponds with a new physical location of the sensor within the space;
the sensor is configured to capture frames of a global plane for at least a portion of the space, wherein:
the global plane represents (x,y) coordinates for the at least a portion of the space;
each frame comprises a plurality of pixels; and
each pixel from the plurality of pixels is associated with a pixel location comprising a pixel row and a pixel column; and

the position sensor is configured to output (x,y) coordinates corresponding with the physical location of the sensor within the space;

determining translation coefficients for the sensor based on a difference between the first (x,y) coordinate and a second (x,y) coordinate, wherein the second (x,y) coordinate corresponds with a previous physical location of the sensor within the space;
updating a homography that is associated with the sensor by applying the translation coefficients to the homography, wherein:
the homography comprises coefficients that translate between pixel locations in a frame from the sensor and (x,y) coordinates in the global plane; and
the homography is associated with sensor located at the second (x,y) coordinate within the space; and

storing the updated homography.