Global Patent Index - EP 1412910 A1

EP 1412910 A1 20040428 - METHOD AND APPARATUS FOR EXTRACTING INFORMATION FROM A TARGET AREA WITHIN A TWO-DIMENSIONAL GRAPHICAL OBJECT IN AN IMAGE

Title (en)

METHOD AND APPARATUS FOR EXTRACTING INFORMATION FROM A TARGET AREA WITHIN A TWO-DIMENSIONAL GRAPHICAL OBJECT IN AN IMAGE

Title (de)

VERFAHREN UND VORRICHTUNG ZUM EXTRAHIEREN VON INFORMATIONEN AUS EINEM ZIELBEREICH IN EINEM ZWEIDIMENSIONALEN GRAPHISCHEN OBJEKT IN EINEM BILD

Title (fr)

PROCEDE ET APPAREIL PERMETTANT D'EXTRAIRE DES INFORMATIONS D'UNE ZONE CIBLE DANS UN OBJET GRAPHIQUE BIDIMENSIONNEL D'UNE IMAGE

Publication

EP 1412910 A1 20040428 (EN)

Application

EP 02733754 A 20020607

Priority

  • SE 0201098 W 20020607
  • SE 0102021 A 20010607

Abstract (en)

[origin: WO02099738A1] A method is presented for extracting information from a target area (101) within a two-dimensional graphical object (100) having a plurality of predetermined features (23) with known characteristics in a first plane. An image (102) is read where the object (100) is located in a second plane, which is a priori unknown. A plurality of candidates (108) to the features in the second plane are identified in the image. A transformation matrix (H) for projective mapping between the second and first planes is calculated from the identified feature candidates. The target area (101) of the object is transformed from the second plane into the first plane. Finally, the target area is processed so as to extract the information.

IPC 1-7

G06K 9/22; G06K 9/46

IPC 8 full level

G06V 30/166 (2022.01); G06V 30/10 (2022.01)

CPC (source: EP US)

G06V 20/62 (2022.01 - EP US); G06V 30/166 (2022.01 - EP US); G06V 30/10 (2022.01 - EP US)

Citation (search report)

See references of WO 02099738A1

Citation (examination)

  • LIEBOWITZ D.; ZISSERMAN A.: "Metric rectification for perspective images of planes", IEEE COMPUTER SOCIETY CONFERENCE, 23 June 1998 (1998-06-23), SANTA BARBARA, CA, pages 482 - 488, XP010291688
  • SCHAFFALITZKY F.; ZISSERMAN A.: "Geometric Grouping of Repeated Elements within Images", SHAPE, CONTOUR AND GROUPING IN COMPUTER VISION, LNCS 1681, pages 165 - 181
  • HARTLEY R.; ZISSERMAN A.: "Multiple View Geometry in Computer Vision", 2000, CAMBRIDGE UNIVERSITY PRESS, NEW YORK, USA
  • SUK T.; FLUSSER J.: "Convex Layers: A new tool for Recognition of Projectively Deformed Point Sets", CAIP'99, LNCS 1689, 1999, pages 454 - 461
  • FUJISAWA H.; SAKO H.; OKADA Y.; SEONG-WHAN LEE: "Information capturing camera and developmental issues", ICDAR '99. PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON DOCUMENT ANALYSIS AND RECOGNITION, 20 September 1999 (1999-09-20), pages 205 - 208, XP010351192
  • BURNS B.; HANSON A.; RISEMAN E., IEEE TRANS. ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE, vol. 8, no. 4, July 1986 (1986-07-01), pages 425 - 455, XP001016046

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

DOCDB simple family (publication)

WO 02099738 A1 20021212; EP 1412910 A1 20040428; SE 0102021 D0 20010607; SE 0102021 L 20021208; SE 522437 C2 20040210

DOCDB simple family (application)

SE 0201098 W 20020607; EP 02733754 A 20020607; SE 0102021 A 20010607