Christopher Springfield

US Patent:

8159499, Apr 17, 2012

Filed:

May 8, 2008

Appl. No.:

12/151835

Inventors:

Lewis N. Siegel - Burbank CA, US
Christopher Daniel Springfield - Glendale CA, US
Robert L. Miles - Sun Valley CA, US
Donald Adolph Lusinsky - Fullerton CA, US

Assignee:

Disney Enterprises, Inc. - Burbank CA

International Classification:

G09G 5/00

US Classification:

345582, 345426, 345428, 348131

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.