US 7,689,057 B2Granted

Method of bandlimiting data for computer graphics

AssigneePixar

InventorsRobert L. Cook, Tony DeRose

Life of this patent

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Abstract

Function spaces defined by scaling functions are used to generate bandlimited noise octaves and other attribute data sets. Scaling functions are basis functions that admit multiresolution analysis and include piecewise constant scaling functions, piecewise polynomial scaling functions, bandlimited scaling functions, Daubeschies scaling functions, as well as other multiresolution analysis scaling basis functions known to those of skill in the art. Scaling basis functions can be locally supported or have infinite support. The properties of the scaling basis functions used to construct bandlimited noise octaves may ensure that any bandlimited noise octave at resolution level N is orthogonal to bandlimited noise octaves and their associated scaling basis functions at all resolution levels less than N. Bandlimited noise octaves can be scaled to any resolution level and guaranteed to have no effect on images at any lower resolution level.

Claims25

Dependent claims

A method of creating a data set for use in creating at least one computer graphics image, the method comprising:

receiving an unfiltered data set, wherein the unfiltered data set has a first frequency spectrum, wherein the first frequency spectrum includes a first maximum frequency;
using a processor, transforming the unfiltered data set into a filtered data set, wherein the filtered data set has a second frequency spectrum, wherein the second frequency spectrum includes a second maximum frequency, wherein the second maximum frequency is less than the first maximum frequency;
using a processor, processing the filtered data set and the unfiltered data set to define a first bandlimited data set having a frequency spectrum substantially between the first maximum frequency and the second maximum frequency;
and
using a processor, combining the first bandlimited data set with a second bandlimited data set having a frequency spectrum substantially between a third frequency and a fourth frequency to form the data set.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/342,239Filed 26 Jan 2006 · us provisional application
Priority: 26 Jan 2005
Published: US 2006/0164426 A127 Jul 2006
Granted: 30 Mar 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

G06T 15/50
Three-dimensional [3D] image rendering: lighting effects
G06T 15/04
Three-dimensional [3D] image rendering: texture mapping
G06T
Image data processing or generation, in general

Family

Application60/647,726Us provisional application · filed 26 Jan 2005
Application60/675,932Us provisional application · filed 21 Apr 2005
US 2006/0164426 A1Pre-grant publication · published 27 Jul 2006
US 7,689,057 B2This patent

From the US filing history. Foreign family members aren’t listed.