Patents by Inventor David L. Borland

David L. Borland 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).

  • Patent number: 4326190
    Abstract: A character feature detection system is provided for reliably reading alphanumeric characters. An information field is scanned by sensor array and the sensor responses are digitized to form a binary character image. The image is traced from boundary point to boundary point. A transition from one boundary point to another is defined by one of eight equally divergent vectors which are indicative of the local slope of a boundary between connected points. The sequence of vectors in their xy locations recorded in the boundary slopes are indicated by averaging vectors representative of the cell to cell transition. Character features are detected from the sequence of boundary slopes to form a feature set. The feature decision logic analyzes the primary features to form a set of secondary features based upon the occurrence and order of the features. The set of secondary features are then analyzed in a sequential logic decision tree to identify the character.
    Type: Grant
    Filed: August 30, 1978
    Date of Patent: April 20, 1982
    Inventors: David L. Borland, Lyle W. Shaw