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公开(公告)号：JP2003179746A
公开(公告)日：2003-06-27
申请号：JP2002257487
申请日：2002-09-03
Applicant: ST MICROELECTRONICS SA
Inventor： PETITJEAN GUILLAUME
Abstract: PROBLEM TO BE SOLVED: To provide a method for inserting at least one binary code in a digital image. SOLUTION: The code is converted to a deformation of contours of objects in the image. COPYRIGHT: (C)2003,JPO
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公开(公告)号：FR2829343A1
公开(公告)日：2003-03-07
申请号：FR0111433
申请日：2001-09-04
Applicant: ST MICROELECTRONICS SA
Inventor： PETITJEAN GUILLAUME
Abstract: The binary code insertion has a digital image (I) for insertion with the image contours modified by insertion. The image contours of objects are found, and the contours of the rest of the image isolated. The Fourier descriptors are calculated and modified in the binary code to insert in the image. The image is then reconstructed following the new contours.
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Patent Agency Ranking
公开(公告)号：FR2890215B1
公开(公告)日：2007-11-09
申请号：FR0552617
申请日：2005-08-31
Applicant: ST MICROELECTRONICS SA , UNIV PAUL CEZANNE UNIVERSITE D
Inventor： MARTIN LIONEL , PETITJEAN GUILLAUME , KETCHANTANG WILLIAM
Abstract: The method involves filtering an image with a structuring element corresponding to a disk with a diameter approximately corresponding to a thickness of an eyelash. A structuring element corresponding to a disk having a radius corresponding to a minimum expected radius of a pupil in the image is opened. A contrast enhancement comprising a linear piecewise stretching is enhanced to adjust histogram of grey levels of the image within a bounded interval, defined by the minimum and maximum intensity values desired in the final image. An independent claim is also included for a system for recognizing an iris of an eye.
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公开(公告)号：DE60307583T2
公开(公告)日：2007-10-04
申请号：DE60307583
申请日：2003-11-19
Applicant: ST MICROELECTRONICS SA
Inventor： TISSE CHRISTEL-LOIC , PLAZA LAURENT , PETITJEAN GUILLAUME
Abstract: The method involves approximately localizing a pupil in an image. An examination window centered at a position is defined from the approximate position of the pupil. A gradient accumulation operation is applied to the luminance values of the pixels of the examination window. A running total is proportional to a definition score of the image. An Independent claim is also included for a digital image processing system.
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公开(公告)号：FR2890215A1
公开(公告)日：2007-03-02
申请号：FR0552617
申请日：2005-08-31
Applicant: ST MICROELECTRONICS SA , UNIV PAUL CEZANNE UNIVERSITE D
Inventor： MARTIN LIONEL , PETITJEAN GUILLAUME , KETCHANTANG WILLIAM
Abstract: L'invention concerne un procédé et système de traitement numérique d'une image d'iris d'oeil ou analogue, comportant au moins une première étape de filtrage (521) correspondant à une fermeture morphologique par un premier élément structurant correspondant à un disque dont le rayon en nombre de pixels correspond approximativement à l'épaisseur d'un cil dans l'image, et une deuxième étape de filtrage (522) correspondant à une ouverture morphologique de l'image résultant de l'étape précédente par un deuxième élément structurant correspondant à un disque dont le rayon en nombre de pixels est compris entre deux et cinq fois celui du disque de la première étape.
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公开(公告)号：DE60311747D1
公开(公告)日：2007-03-29
申请号：DE60311747
申请日：2003-11-19
Applicant: ST MICROELECTRONICS SA
Inventor： TISSE CHRISTEL-LOIC , PLAZA LAURENT , PETITJEAN GUILLAUME
Abstract: The method involves cumulating quadratic norms of horizontal and vertical gradients of luminance values of pixels to determine a cumulated total. The pixels are chosen according to a comparison of maximum luminance threshold to adjacent pixels in a concerned direction. The score is obtained by dividing the cumulated total by the number of cumulated quadratic norms. An Independent claim is also included for a system for determining the definition of a digital image
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公开(公告)号：DE60307583D1
公开(公告)日：2006-09-28
申请号：DE60307583
申请日：2003-11-19
Applicant: ST MICROELECTRONICS SA
Inventor： TISSE CHRISTEL-LOIC , PLAZA LAURENT , PETITJEAN GUILLAUME
Abstract: The method involves approximately localizing a pupil in an image. An examination window centered at a position is defined from the approximate position of the pupil. A gradient accumulation operation is applied to the luminance values of the pixels of the examination window. A running total is proportional to a definition score of the image. An Independent claim is also included for a digital image processing system.
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