Peter C Litwinowicz

US Patent:

59951109, Nov 30, 1999

Filed:

Jul 3, 1997

Appl. No.:

8/887608

Inventors:

Peter C. Litwinowicz - Sunnyvale CA

Assignee:

Apple Computer, Inc. - Cupertino CA

International Classification:

G06T 1500

US Classification:

345425

Abstract:

Morphing techniques are employed to enable a user to locally deform a texture image on a three-dimensional object, and thereby align image features in a texture map with geometric features of the object. An affine transformation can be applied to the texture map to provide a rough fit of the texture image to the geometric model. The transformed texture image is placed on the geometric model and the user designates corresponding features on the texture image and the geometric model. Once the designations have been completed, the texture image is warped into a final, deformed image, which is then mapped onto the three-dimensional object. With this approach, the user can apply pre-existing images to three-dimensional models, without being required to repaint any portion of the image.

US Patent:

56805314, Oct 21, 1997

Filed:

Jul 2, 1993

Appl. No.:

8/087210

Inventors:

Peter C. Litwinowicz - Sunnyvale CA
Lance Williams - Cupertino CA
Shenchang Eric Chen - Sunnyvale CA

Assignee:

Apple Computer, Inc. - Cupertino CA

International Classification:

G06T 1300

US Classification:

395173

Abstract:

An animation system employs scattered data interpolation to provide fluent animation of still images. Discontinuities, such as cuts and holes, can be established within an image, to limit the range over which interpolation is carried out for a given deformation of a feature in the image, and thereby refine the control exerted by animated features. The amount of computational time and effort required to interpolate the change from one frame of an animation to the next is reduced by concentrating computation of the deformed image on areas of change. Computational requirements are further reduced by taking advantage of frame-to-frame coherence.