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:
Apr. 28, 1992
Filed:
Jul. 24, 1987
Applicant:
Inventors:
Olin G Lathrop, Groton, MA (US);
David B Kirk, Concord, MA (US);
Douglas A Voorhies, Framingham, MA (US);
Assignee:
Hewlet-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395133 ;
Abstract
A system for quadratic and higher order interpolation of pixel color and other pixel values into a bitmap image enables enhanced shading for generation of realistic computer graphics images. The system incorporates modules for executing incremental evaluation of pixel values, utilizing forward differencing in N arbitrary directions of incremental evaluation. The system alternatively incorporates non-incremental evaluation elements for directly evaluating polynomials or executing a spline function of control points.