Patents by Inventor Birgit Ueberreiter

Birgit Ueberreiter 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).

  • Method for reconstructing linear structures present in raster form
    Patent number: 5920641
    Abstract: Linear structures are used to identify persons. In order to be able to combine a multiplicity of such linear structures in a database, their original images are analyzed and reconstructed using orthonormal basic functions. A preferred direction of the linear structure is determined for each pixel. A quality measure is used to evaluate the reliability of the analyzed data. Singularities (SI) and minutiae (MI) are extracted and stored.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: July 6, 1999
    Assignee: Siemens Nixdorf Informationssysteme Aktiengesellschaft
    Inventors: Birgit Ueberreiter, Joachim Dengler