Patents by Inventor Christophe Delange

Christophe Delange 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).

  • Arrangement for determining contrasting objects in a picture
    Patent number: 5031226
    Abstract: This arrangement comprises at least a processing block (2) provided with mean value calculating members for calculating for each picture element different mean background values (16, 18, 20), a contrast measuring member (22) for producing a deviation value between the mean values and the luminance L(i, j) of the picture element to be processed, a comparator (30) for producing the indication of the contrasting object by comparing the different deviation values to at least one predetermined threshold value and a background value assigning member (55) for assigning a background value for each picture element on the basis of said mean values.
    Type: Grant
    Filed: July 12, 1989
    Date of Patent: July 9, 1991
    Assignee: U.S. Philips Corporation
    Inventor: Christophe Delange