The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2009
Filed:
Jun. 30, 2006
John M. Snyder, Redmond, WA (US);
Peter-pike J. Sloan, Bellevue, WA (US);
Baining Guo, Bellevue, WA (US);
Kun Zhou, Beijing, CN;
Rui Wang, Hangzhou, CN;
Xinguo Liu, Hangzhou, CN;
Zhong Ren, Beijing, CN;
BO Sun, New York, NY (US);
John M. Snyder, Redmond, WA (US);
Peter-Pike J. Sloan, Bellevue, WA (US);
Baining Guo, Bellevue, WA (US);
Kun Zhou, Beijing, CN;
Rui Wang, Hangzhou, CN;
Xinguo Liu, Hangzhou, CN;
Zhong Ren, Beijing, CN;
Bo Sun, New York, NY (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
The present soft shadowing technique pre-computes visibility of blockers using a log of a spherical harmonic visibility function. These logs can then be accumulated and exponentiated in real-time to yield the product visibility vector over all the blockers. The product visibility vector is combined with the light intensity and surface reflectance to determine shading at a receiver point in a computer-generated scene.