Patents by Inventor George W. Hartwig, Jr.

George W. Hartwig, Jr. 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).

  • System and method for image tamper detection via thumbnail hiding
    Patent number: 6831990
    Abstract: A semi-fragile image tamper detection system and method based on thumbnail hiding and which signifies the image areas in which tampering has occurred, is provided. A thumbnail is defined as a low-resolution version of an entire image or the significant features of an entire image. Thumbnail hiding is chosen to be resilient to effects of both image compression and low levels of transmission channel noise. The thumbnail computation and embedding techniques are chosen such that the resultant marked image corresponds in size and dynamic range to the original image.
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: December 14, 2004
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Lisa M. Marvel, George W. Hartwig, Jr.