Patents by Inventor Stephen R. Dashiell

Stephen R. Dashiell 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: 10158784
    Abstract: A system and method adaptively lossy compresses image data by receiving a pixel of image data and meta data indicating a type of object that generated the pixel of image data, the pixel of image data includes a first byte having most significant bits of image data and a second byte having least significant bits of image data; electronically determining if the meta data associated with the pixel of image data is associated with a noisy image or indicates that the pixel of image data was generated by a specific type of object; electronically modifying the pixel of image data, when it is determined that the meta data is associated with the pixel of image data is associated with a noisy image or indicates that the pixel of image data was generated by a specific type of object, by setting a predetermined number of low bits of the pixel of image data to zero.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: December 18, 2018
    Assignee: Xerox Corporation
    Inventors: Stephen R. Dashiell, David E. Rumph
  • Publication number: 20180160013
    Abstract: A system and method adaptively lossy compresses image data by receiving a pixel of image data and meta data indicating a type of object that generated the pixel of image data, the pixel of image data includes a first byte having most significant bits of image data and a second byte having least significant bits of image data; electronically determining if the meta data associated with the pixel of image data is associated with a noisy image or indicates that the pixel of image data was generated by a specific type of object; electronically modifying the pixel of image data, when it is determined that the meta data is associated with the pixel of image data is associated with a noisy image or indicates that the pixel of image data was generated by a specific type of object, by setting a predetermined number of low bits of the pixel of image data to zero.
    Type: Application
    Filed: December 7, 2016
    Publication date: June 7, 2018
    Applicant: Xerox Corporation
    Inventors: Stephen R. Dashiell, David E. Rumph
  • Patent number: 4843542
    Abstract: A system for maintaining data consistency among distributed processors, each having its associated cache memory. A processor addresses data in its cache by specifying the virtual address. The cache will search its cells for the data associatively. Each cell has a virtual address, a real address, flags and a plurality of associated data words. If there is no hit on the virtual address supplied by the processor, a map processor supplies the equivalent real address which the cache uses to access the data from another cache if one has it, or else from real memory. When a processor writes into a data word in the cache, the cache will update all other caches that share the data before allowing the write to the local cache.
    Type: Grant
    Filed: November 12, 1986
    Date of Patent: June 27, 1989
    Assignee: Xerox Corporation
    Inventors: Stephen R. Dashiell, Bindiganavele A. Prasad, Ronald E. Rider, James A. Steffen