Abstract: A system includes a sensor, a weight sensor, and a tracking subsystem. The tracking subsystem receives an image feed of top-view images generated by the sensor and weight measurements from the weight sensor. The tracking subsystem detects an event associated with an item being removed from a rack in which the weight sensor is installed. The tracking subsystem determines that a first person or a second person may be associated with the event. In response to determining that the first or second person may be associated with the event, buffer frames are stored of top-view images generated by the sensor during a time period associated with the event. The tracking subsystem then determines, using at least one of the stored buffer frames and a first action-detection algorithm, whether an action associated with the event was performed by the first person or the second person.

Abstract: A system includes a sensor, a weight sensor, and a tracking subsystem. The tracking subsystem receives an image feed of top-view images generated by the sensor and weight measurements from the weight sensor. The tracking subsystem detects an event associated with an item being removed from a rack in which the weight sensor is installed. The tracking subsystem determines that a first person and a second person may be associated with the event. The tracking subsystem then determines, using a first approach, whether an action associated with the event was performed by the first person or the second person. If results of the first approach do not satisfy criteria, a second approach is used to assign the action to the first or second person.

Abstract: An object tracking system includes a sensor and a tracking system. The sensor is configured to capture a first frame of a global plane for at least a portion of a marker grid in a space. The tracking system is configured to receive a first coordinate in the global plane for a first corner of a marker grid, to determine a second coordinate in the global plane for the first marker on the marker grid, and to determine a third coordinate in the global plane where the second marker on the marker grid. The tracking system is further configured to determine a first pixel location for the first marker, to determine a second pixel location for the second marker, and to generate a homography based on the second coordinate for the first marker, the third coordinate for the second marker, the first pixel location, and the second pixel location.

Abstract: An apparatus includes a processor. The processor receives an algorithmic shopping cart that includes a first set of items determined by an algorithm to have been selected by a person during a shopping session in a physical store, based on a set of inputs received from sensors located within the physical store. The processor also receives a virtual shopping cart that includes a second set of items. Video of the shopping session was captured by a set of cameras located in the physical store and depicts the person selecting the second set of items. The processor compares the algorithmic cart to the virtual cart and determines that a discrepancy exists between the algorithmic cart and the virtual cart. The processor determines a subset of the set of inputs associated with the discrepancy and attaches metadata explaining the discrepancy to the subset. The processor uses the subset to train the algorithm.

Abstract: A rolling information display system includes a heated roller grill having at least a first coated, heated roller positioned adjacent a second coated, heated roller, said at least first and second coated, heated rollers rotating together; and a tube comprising a plastic material resistant to temperatures at which the heated roller grill operates, the tube being open on both ends and further comprising rolling surfaces at opposing ends of the tube for rolling in contact with heated rolling surfaces of the heated roller grill and one or more recessed surfaces for bearing information about products provided on the heated roller grill. Information is printed in the one or more recessed surfaces, or is applied directly to or molded directly into the recessed surfaces. The rolling surface at opposing ends of the tube are integral with the tube. The products provided on the heated roller grill are food items.

Abstract: A rolling information display system includes a heated roller grill having at least a first coated, heated roller positioned adjacent a second coated, heated roller, said at least first and second coated, heated rollers rotating together; and a tube comprising a plastic material resistant to temperatures at which the heated roller grill operates, the tube being open on both ends and further comprising rolling surfaces at opposing ends of the tube for rolling in contact with heated rolling surfaces of the heated roller grill and one or more recessed surfaces for bearing information about products provided on the heated roller grill. Information is printed in the one or more recessed surfaces, or is applied directly to or molded directly into the recessed surfaces. The rolling surface at opposing ends of the tube are integral with the tube. The products provided on the heated roller grill are food items.

Abstract: A rolling information display system includes a heated roller grill having at least a first coated, heated roller positioned adjacent a second coated, heated roller, said at least first and second coated, heated rollers rotating together; and a tube comprising a plastic material resistant to temperatures at which the heated roller grill operates, the tube being open on both ends and further comprising rolling surfaces at opposing ends of the tube for rolling in contact with heated rolling surfaces of the heated roller grill and one or more recessed surfaces for bearing information about products provided on the heated roller grill. Information is printed in the one or more recessed surfaces, or is applied directly to or molded directly into the recessed surfaces. The rolling surface at opposing ends of the tube are integral with the tube. The products provided on the heated roller grill are food items.

Abstract: A rolling information display system includes a heated roller grill having at least a first coated, heated roller positioned adjacent a second coated, heated roller, said at least first and second coated, heated rollers rotating together; and a tube comprising a plastic material resistant to temperatures at which the heater roller grill operates, the tube being open on both ends and further comprising rolling surfaces at opposing ends of the tube for rolling in contact with heated rolling surfaces of the heated roller grill and one or more recessed surfaces for bearing information about products provided on the heated roller grill. Information is printed in the one or more recessed surfaces, or is applied directly to or molded directly into the recessed surfaces. The rolling surface at opposing ends of the tube are integral with the tube. The products provided on the heated roller grill are food items.

Abstract: A rolling information display system includes a heated roller grill having at least a first coated, heated roller positioned adjacent a second coated, heated roller, said at least first and second coated, heated rollers rotating together; and a tube comprising a plastic material resistant to temperatures at which the heater roller grill operates, the tube being open on both ends and further comprising rolling surfaces at opposing ends of the tube for rolling in contact with heated rolling surfaces of the heated roller grill and one or more recessed surfaces for bearing information about products provided on the heated roller grill. Information is printed in the one or more recessed surfaces, or is applied directly to or molded directly into the recessed surfaces. The rolling surface at opposing ends of the tube are integral with the tube. The products provided on the heated roller grill are food items.

Abstract: In one aspect, a rolling information display apparatus for use with a roller grill includes an elongated envelope. A cap is removably positioned over at least one opening of the envelope. An information bearing medium is removably positioned inside the envelope. In one embodiment, a sealing member is disposed to create a substantially watertight seal over at least one opening of the envelope. In another aspect, a rolling information display apparatus for use with a roller grill is a cylindrical rolling member having one or more rolling surfaces rolling in contact with heated rolling surfaces of the grill. The cylindrical rolling member also has one or more recessed surfaces bearing information about food items offered for sale on the grill. The recessed surfaces are provided in regions of the rolling member that are of diameter less than regions of the rolling member in which the rolling surfaces are provided.

Abstract: In one aspect, a rolling information display apparatus for use with a roller grill includes an elongated envelope. A cap is removably positioned over at least one opening of the envelope. An information bearing medium is removably positioned inside the envelope. In one embodiment, a sealing member is disposed to create a substantially watertight seal over at least one opening of the envelope. In another aspect, a rolling information display apparatus for use with a roller grill is a cylindrical rolling member having one or more rolling surfaces rolling in contact with heated rolling surfaces of the grill. The cylindrical rolling member also has one or more recessed surfaces bearing information about food items offered for sale on the grill. The recessed surfaces are provided in regions of the rolling member that are of diameter less than regions of the rolling member in which the rolling surfaces are provided.

Abstract: In one aspect, a rolling information display apparatus for use with a roller grill includes an elongated envelope. A cap is removably positioned over at least one opening of the envelope. An information bearing medium is removably positioned inside the envelope. In one embodiment, a sealing member is disposed to create a substantially watertight seal over at least one opening of the envelope. In another aspect, a rolling information display apparatus for use with a roller grill is a cylindrical rolling member having one or more rolling surfaces rolling in contact with heated rolling surfaces of the grill. The cylindrical rolling member also has one or more recessed surfaces bearing information about food items offered for sale on the grill. The recessed surfaces are provided in regions of the rolling member that are of diameter less than regions of the rolling member in which the rolling surfaces are provided.

Abstract: In one aspect, a rolling information display apparatus for use with a roller grill includes an elongated envelope. A cap is removably positioned over at least one opening of the envelope. An information bearing medium is removably positioned inside the envelope. In one embodiment, a sealing member is disposed to create a substantially watertight seal over at least one opening of the envelope. In another aspect, a rolling information display apparatus for use with a roller grill is a cylindrical rolling member having one or more rolling surfaces rolling in contact with heated rolling surfaces of the grill. The cylindrical rolling member also has one or more recessed surfaces bearing information about food items offered for sale on the grill. The recessed surfaces are provided in regions of the rolling member that are of diameter less than regions of the rolling member in which the rolling surfaces are provided.