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1. (US20040136567) Tracking a surface in a 3-dimensional scene using natural visual features of the surface

Application Number: 10692020 Application Date: 22.10.2003
Publication Number: 20040136567 Publication Date: 15.07.2004
Grant Number: 7343278 Grant Date: 11.03.2008
Publication Kind : B2
IPC:
G06F 9/455
G06F 7/60
G06F 17/10
G06F 17/50
G06G 7/48
G06K 9/00
G06K 9/32
G06T
G06T 7/00
G06T 7/20
G06T 15/00
G09G 5/00
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
9
Arrangements for programme control, e.g. control unit
06
using stored programme, i.e. using internal store of processing equipment to receive and retain programme
44
Arrangements for executing specific programmes
455
Emulation; Software simulation
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
7
Methods or arrangements for processing data by operating upon the order or content of the data handled
60
Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
17
Digital computing or data processing equipment or methods, specially adapted for specific functions
10
Complex mathematical operations
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
17
Digital computing or data processing equipment or methods, specially adapted for specific functions
50
Computer-aided design
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
G
ANALOGUE COMPUTERS
7
Devices in which the computing operation is performed by varying electric or magnetic quantities
48
Analogue computers for specific processes, systems, or devices, e.g. simulators
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
K
RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9
Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
K
RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9
Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
20
Image acquisition
32
Aligning or centering of the image pick-up or image-field
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
T
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
T
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7
Image analysis, e.g. from bit-mapped to non bit-mapped
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
T
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7
Image analysis, e.g. from bit-mapped to non bit-mapped
20
Analysis of motion
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
T
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
15
3D [Three Dimensional] image rendering
G PHYSICS
09
EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
G
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
5
Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
Applicants: ARToolWorks, Inc.
Inventors: Billinghurst Mark N.
Kato Hirokazu
Agents: Perkins Coie LLP
Priority Data: 60420638 22.10.2002 US
60513725 22.10.2003 US
Title: (EN) Tracking a surface in a 3-dimensional scene using natural visual features of the surface
Abstract: front page image
(EN)

A facility for determining the 3-dimensional location and orientation of a subject surface in a distinguished perspective image of the subject surface is described. The subject surface has innate visual features, a subset of which are selected. The facility uses the location of the selected visual features in a perspective image of the subject surface that precedes the distinguished perspective image in time to identify search zones in the distinguished perspective image. The facility searches the identified search zones for the selected visual features to determine the 2-dimensional locations at which the selected visual features occur. Based on the determined 2-dimensional locations, the facility determines the 3-dimensional location and orientation of the subject surface in the distinguished perspective image.