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1. (EP1556805) TRACKING A SURFACE IN A 3-DIMENSIONAL SCENE USING NATURAL VISUAL FEATURES OF THE SURFACE

Application Number: 03796236 Application Date: 22.10.2003
Publication Number: 1556805 Publication Date: 27.07.2005
Publication Kind : B1
Designated States: AT,BE,BG,CH,CY,CZ,DE,DK,EE,ES,FI,FR,GB,GR,HU,IE,IT,LI,LU,MC,NL,PT,RO,SE,SI,SK,TR
Prior PCT appl.: Application Number:IB2003006418 ; Publication Number: Click to see the data
IPC:
G06T 15/00
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
G09G 5/00
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
T
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
15
3D [Three Dimensional] image rendering
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
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
CPC:
G06T 7/0044
G06K 9/32
G06T 7/204
G06T2207/10016
Applicants: ARTOOLWORKS
Inventors: KATO HIROKAZU
BILLINGHURST MARK NATHAN
Priority Data: 0306418 22.10.2003 IB
42063802 22.10.2002 US
51372503 22.10.2003 US
Title: (DE) VERFOLGUNG EINER OBERFLÄCHE IN EINERDREIDIMENSIONALEN SZENE UNTER VERWENDUNG NATÜRLICHER VISUELLER MERKMALE DEROBERFLÄCHE
(EN) TRACKING A SURFACE IN A 3-DIMENSIONAL SCENE USING NATURAL VISUAL FEATURES OF THE SURFACE
(FR) LOCALISATION D'UNE SURFACE DANS UNE SCENE TRIDIMENSIONNELLE A L'AIDE DE CARACTERISTIQUES VISUELLES NATURELLES DE CETTE 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 (216). 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(210, 230, 220).
(FR) L'invention concerne une fonction permettant de déterminer la localisation tridimensionnelle et l'orientation d'une surface de sujet dans une image de perspective distinctive de la surface du sujet. Ladite surface de sujet présente des caractéristiques visuelles innées, un sous-ensemble de ces caractéristiques étant sélectionné. Ladite fonction utilise la localisation de caractéristiques visuelles sélectionnées dans une image de perspective de la surface du sujet antérieure à une image de perspective distinctive afin d'identifier des zones de recherche dans ladite image de perspective distinctive. La fonction permet de rechercher des zones de recherche identifiées pour les caractéristiques visuelles sélectionnées afin de déterminer les localisations bidimentionnelles au niveau desquelles apparaissent les caractéristiques visuelles sélectionnées. En fonction des localisations bidimentionnelles, la fonction permet de déterminer la localisation tridimensionnelle et l'orientation de la surface du sujet dans l'image de perspective distinctive.