Individual identification system

An individual identification method comprising:

• detecting, by a first detector, products to be registered when the products enter an upstream process of a plurality of processes constituting a production line for products, the first detector detecting the products as the products individually enter the upstream process;
• detecting, by a second detector, the products when the products enter a downstream process of the plurality of processes, the downstream process being downstream from the upstream process, the second detector detecting the products as the products individually enter the downstream process;
• when the first detector detects a current upstream product of the products, acquiring a captured upstream image of the detected current upstream product as a registration image, and storing the registration image in a second memory in association with product information including information representing a passing sequence of the products through the upstream process;
• managing a matching sequence of the products through the downstream process;
• and
• when the second detector detects a current downstream product of the products, acquiring a captured downstream image of the detected current downstream product, and performing matching between the captured downstream image and the registration image stored in the second memory for the current upstream product corresponding to the current downstream product, according to the matching sequence,
• wherein management of the matching sequence includes, when the matching succeeds, updating the matching sequence to include just the registration image of each of the products that have not been matched with the captured downstream image, in an order corresponding to the products in the passing sequence.

A non-transitory computer-readable storage medium storing a program executable by a computer to perform processing,

• wherein a first detector detects products to be registered when the products enter an upstream process of a plurality of processes constituting a production line for products, the first detector detecting the products as the products individually enter the upstream process,
• wherein a second detector that detects the products when the products enter a downstream process of the plurality of processes, the downstream process being downstream from the upstream process, the second detector detecting the products as the products individually enter the downstream process, and
• wherein the processing comprises:
• when the first detector detects a current upstream product of the products, acquiring a captured upstream image of the detected current upstream product as a registration image, and storing the registration image in a second memory in association with product information including information representing a passing sequence of the products through the upstream process;
• managing a matching sequence of the products through the downstream process;
• and
• when the second detector detects a current downstream product of the products, acquiring a captured downstream image of the detected current downstream product, and performing matching between the captured downstream image and the registration image stored in the second memory for the current upstream product corresponding to the current downstream product, according to the matching sequence,
• wherein management of the matching sequence includes, when the matching succeeds, updating the matching sequence to include just the registration image of each of the products that have not been matched with the captured downstream image, in an order corresponding to the products in the passing sequence.