Biometric sensors

A - Human Necessities – 61 – B

Patent

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Details

A61B 5/117 (2006.01) G01N 33/48 (2006.01) G06K 9/60 (2006.01)

Patent

CA 2621379

Methods are described of evaluating the genuineness of a sample presented for biometric evaluation. The sample is illuminated under distinct optical conditions. Light scattered from the sample is received. Multiple images are formed, each image being formed from the received light for one of the optical conditions. A set of texture measures is generated, each texture measure being generated from one of the images. It is determined whether the generated texture measures is consistent with the sample being authentic unconcealed biological tissue.

L'invention concerne des procédés pour évaluer l'authenticité d'un échantillon destiné à une évaluation biométrique. Ledit échantillon est éclairé dans des états optiques distincts. La lumière diffusée par l'échantillon est récupérée. De nombreuses images sont formées, chacune étant formée à partir de la lumière reçue pour un état optique particulier . Un ensemble de mesures de la texture sont produites, chaque mesure étant produite par une des images. L'invention permet de déterminer si les mesures de la texture produites sont fiables, ledit échantillon étant un tissu biologique non dissimulé et authentique.

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