Patent ID: 11911799
Assignee: UNITED STATES POSTAL SERVICES
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 0:
1. A method for detecting a delivery item using a light detector and a camera positioned at a sensing location along a moving surface that moves the delivery item that is on the moving surface, the method comprising:
receiving a light status signal from the light detector, the light status signal having a first state if a light beam directed across the moving surface at the sensing location is detected at the light detector, which indicates absence of the delivery item, or a second state if the light beam is not detected at the light detector, which indicates presence of the delivery item;
receiving image data from the camera, the image data including images at the sensing location;
determining whether the light status signal is erroneous in indicating the absence of the delivery item or the presence of the delivery item based on the image data; and
modifying the light status signal when the light status signal is erroneous.