Patents by Inventor Olivier Riff

Olivier Riff has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Extraction of minutiae from a fingerprint image
    Patent number: 7333640
    Abstract: A method and a system for extracting a minutia mapping from a digital image, including dividing the image into regions; defining an orientation of each region based on the general direction of grooves in this region; and for each region: unidirectionally filtering the image portion along a direction perpendicular to the orientation of the region; locating the enters of gravity of the grooves based on the intensity of the filtering results, chaining up the barycenters along the general direction of the region grooves, and interpreting the results of the chaining to determine the presence of minutiae of end type or of branch type.
    Type: Grant
    Filed: May 13, 2003
    Date of Patent: February 19, 2008
    Assignee: STMicroelectronics S.A.
    Inventors: Olivier Riff, Lionel Martin
  • Extraction of minutiae from a fingerprint image
    Publication number: 20030215118
    Abstract: A method and a system for extracting a minutia mapping from a digital image, including dividing the image into regions; defining an orientation of each region based on the general direction of grooves in this region; and for each region: unidirectionally filtering the image portion along a direction perpendicular to the orientation of the region; locating the enters of gravity of the grooves based on the intensity of the filtering results, chaining up the barycenters along the general direction of the region grooves, and interpreting the results of the chaining to determine the presence of minutiae of end type or of branch type.
    Type: Application
    Filed: May 13, 2003
    Publication date: November 20, 2003
    Inventors: Olivier Riff, Lionel Martin