Object counting device, object counting system and object counting method

An object counting system comprising:

• a plurality of object counting devices, each of the object counting devices comprising:
• an image capturer capturing an image sequence related to a gate within a field of view;
• and
• a processor electrically connected to the image capturer, the processor determining a moving direction of an object when the object in the image sequence passes through an entry/exit reference corresponding to the gate, the processor counting the object into a first accumulated number when the processor determines that the object moves from a first side of the gate towards a second side of the gate, the processor recording an exit position of the object when the object exits from the field of view, the processor determining whether to count the object into a second accumulated number according to the exit position;
• and
• a host device communicating with the object counting devices, the host device receiving a plurality of the first accumulated numbers and a plurality of the second accumulated numbers from the object counting devices, calculating a first sum of the first accumulated numbers, and calculating a second sum of the second accumulated numbers.

An object counting method comprising steps of:

• capturing an image sequence related to a gate within a field of view;
• determining a moving direction of an object when the object in the image sequence passes through an entry/exit reference corresponding to the gate;
• counting the object into a first accumulated number when determining that the object moves from a first side of the gate towards a second side of the gate;
• recording an exit position of the object when the object exits from the field of view;
• and
• determining whether to count the object into a second accumulated number according to the exit position.