Stmicroelectronics S.a.

Guillaume Petitjean

Laurent Plaza

Christel-Loïc Tisse

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.

Evaluation of the definition of an eye iris image

A method and a circuit for marking with a binary code a video sequence compressed by motion calculation, from one picture to another, of macroblocks dividing each picture, the digital pictures being distributed in at least two categories according to whether they are coded integrally or by the motion vectors of the macroblocks with respect to the previous picture or to the previous and next pictures, which includes, at least for the pictures coded by motion vectors, only marking the macroblocks for which the motion vectors are greater than a predetermined threshold.

Insertion of binary messages in video pictures

A method and a system for inserting at least one binary code in a digital image, including converting the code into a modification of contours of objects in the image.

Growing community of inventors

Trets, France

Guillaume Petitjean