Patent ID: 11922698
Assignee: RF CODE, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 13:
14. A system for monitoring a door state of at least one doorway, said system comprising:
a first pair of tracking strips associated with a first doorway, one tracking strip of said first pair being attached to a door of the first doorway, and the other tracking strip of the first pair being fixed to a frame of the first doorway, each of said first pair of tracking strips being of a length greater than a width;
a camera configured to capture an image that includes a view of the first pair of tracking strips associated with the first doorway;
a processor adapted and configured to:
detect in the image at least one of the first pair of tracking strips associated with the first doorway;
determine a lengthwise vector of each detected tracking strip;
set the door state to closed if only one of the first pair of tracking strips is detected, or if both tracking strips of the first pair are detected and their respective lengthwise vectors are substantially parallel; and
set the door state to open if both tracking strips of the first pair are detected and their respective lengthwise vectors are substantially non-parallel.