Biometric recognition method with drift control, and an associated installation

A method of biometric recognition, comprising:

• comparing, by an artificial intelligence unit, reference biometric data extracted from at least one reference image of a body portion of a user with biometric data extracted from at least one image that has been captured of the same body portion of a candidate for recognition;
• deducing, by the artificial intelligence unit, a similarity score from the comparing;
• validating or refusing recognition as a function of the value of the similarity score compared with a predetermined threshold value;
• performing machine learning of the artificial intelligence unit, wherein said performing step comprises teaching the artificial intelligence unit to reject training images which are regularly and voluntarily submitted to the artificial intelligence unit, the training images presenting body portions similar to those of the reference image;
• and
• teaching the artificial intelligence unit to accept at least one anti-drift image which is regularly and voluntarily submitted to the artificial intelligence unit, the at least one anti-drift image being submitted to the artificial intelligence unit at a rate that is less than the rate at which the training images are submitted.