Stmicroelectronics S.a.

Christel-Loïc Tisse

Laurent Plaza

Guillaume Petitjean

A method and a circuit for determining the orientation of ridges of a digital image representing a fingerprint or the like, including for each image pixel, calculating a quantity taking into account the neighboring pixels in all directions, and of bidirectionally scanning the image line by line.

Determination of the orientation of the ridges of a fingerprint

A method and a system for evaluating the definition of the image of an eye iris or the like, including approximately localizing the pupil in the image, defining, from the approximate position of the pupil, an examination window centered on this position, and applying a gradient accumulation operation to the luminance values of the pixels of the examination window, the running total being proportional to the definition score of the image.

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Plan de Cuques, France

Christel-Loïc Tisse