Packaging gets torn, barcodes get covered by labels, and sterile wrappers go in the bin before anyone thinks about stock. When there is nothing to scan, a photo is enough.
The photo is read against the organisation's own catalogue, with what is in stock at that location considered first. The answer is the product, how sure the reading is and why, plus any lot number, expiry or serial printed on the packaging. A reading with a printed GTIN is treated like a scan; a less certain one offers up to three candidates to pick from.
Photo identification uses a vision model and must be switched on by the organisation. The photo is sent to the model to be read and is not stored.