1. A digital image processing method, said method comprising: accessing digital data representing a plurality of digital images including a plurality of persons; performing face recognition to determine first scores relating to similarity between faces of said plurality of persons; performing clothes recognition to determine second scores relating to similarity between clothes of said plurality of persons; providing a plurality of formulas for estimating a probability of a face from said faces and a clothes from said clothes to belong to a person from said plurality of persons, wherein at least one formula of said plurality of formulas utilizes a first score and a second score, and at least one formula of said plurality of formulas utilizes only one score of a first score and a second score; and selecting a formula from said plurality of formulas based on availability of a first score from said first scores for two persons from said plurality of persons, and availability of a second score from said second scores for said two persons, said selected formula estimating a probability relating to similarity of identities of said two persons.