The invention relates to a method for validating (300) the use of a real finger as support for a fingerprint, said validation method (300) comprising: a positioning step (302) during which the support is placed in support, - a capture step (304) during which a so-called captured image of the fingerprint is captured, - a filtering step (306) during which the captured image is transformed into an image resultant by passing through a low-pass filter, - a location step (308) during which an origin point O whose pixel intensity is representative of the maximum pressure exerted on the support is located on the resulting image, - a verification step (310) during which it is verified that, on the resulting image, for a plurality of rays originating from the origin point O, and for each of said rays, for a plurality of points M, the pixel intensity of each point M said radius is representative of a decrease in the pressure exerted on the support as the distance from the origin point O to the point M increases, and - a decision-making step (312) in which a A decision as to the validity of the medium is made based on the results of the verification step (310). L'invention concerne un procédé de validation (300) de l'utilisation d'un vrai doigt comme support d'une empreinte digitale, ledit procédé de validation (300) comportant: - une étape de positionnement (302) au cours de laquelle le support est mis en appui, - une étape de capture (304) au cours de laquelle une image dite capturée de l'empreinte est capturée, - une étape de filtrage (306) au cours de laquelle l'image capturée est transformée en une image résultante par passage à travers un filtre passe-bas, - une étape de localisation (308) au cours de laquelle un point origine O dont l'intensité du pixel est représentative de la pression maximale s'exerçant sur le support est localisé sur l'image résultante, - une étape de vérification (310) au cours de laquelle il est
