Fecha de publicación: 02/01/2025 Fuente: WIPO "tomato" A base machine learning model (MLM) is trained to generate N-dimensional feature vectors from images of items per item code or category. A principal component analysis is processed on the N-dimensional feature vectors per item code to generate fewer reference vectors per item code, each reference vector includes fewer dimensions or features than the corresponding N-dimensional feature vectors. A similarity MLM is trained to receive an item code, corresponding reference vectors for the item code, and a current reduced dimensionality feature vector for a current image of an item associated with a transaction. The similarity MLM produces a similarity score or determines whether the current item is the same or similar to a reference item corresponding to the item code. When the current item is not the same or is dissimilar to the reference item, an alert or an interrupt is provided to audit the transaction for potential theft.