Patents by Inventor Christopher Daniel Springfield

Christopher Daniel Springfield 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).

  • Rendering of shadows with hand-painted appearance
    Patent number: 8159499
    Abstract: Shadows are rendered automatically with a hand-painted appearance. The shadow region is divided into a core and a penumbra. A core perturbation zone is defined between the core and penumbra and a penumbra perturbation zone is defined between the penumbra and an unshadowed region. Within each perturbation zone, a texture is applied to each pixel to map the pixel as being inside or outside the core or penumbra boundary, thereby defining a displaced core boundary and a displaced penumbra boundary. The displaced boundaries can be non-linear and discontinuous. When shadows are rendered using the displaced boundaries, a hand-painted appearance can result. An additional texture can be applied in the penumbra to further enhance the painted appearance.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: April 17, 2012
    Assignee: Disney Enterprises, Inc.
    Inventors: Lewis N. Siegel, Christopher Daniel Springfield, Robert L. Miles, Donald Adolph Lusinsky
  • Rendering of shadows with hand-painted appearance
    Publication number: 20090033673
    Abstract: Shadows are rendered automatically with a hand-painted appearance. The shadow region is divided into a core and a penumbra. A core perturbation zone is defined between the core and penumbra and a penumbra perturbation zone is defined between the penumbra and an unshadowed region. Within each perturbation zone, a texture is applied to each pixel to map the pixel as being inside or outside the core or penumbra boundary, thereby defining a displaced core boundary and a displaced penumbra boundary. The displaced boundaries can be non-linear and discontinuous. When shadows are rendered using the displaced boundaries, a hand-painted appearance can result. An additional texture can be applied in the penumbra to further enhance the painted appearance.
    Type: Application
    Filed: May 8, 2008
    Publication date: February 5, 2009
    Applicant: Disney Enterprises, Inc.
    Inventors: Lewis N. Siegel, Christopher Daniel Springfield, Robert L. Miles, Donald Adolph Lusinsky