ES2171432T3 - Aparato y metodos para reconocer una imagen especifica a partir de una señal de imagen de entrada. - Google Patents

Aparato y metodos para reconocer una imagen especifica a partir de una señal de imagen de entrada.

Info

Publication number
ES2171432T3
ES2171432T3 ES94119409T ES94119409T ES2171432T3 ES 2171432 T3 ES2171432 T3 ES 2171432T3 ES 94119409 T ES94119409 T ES 94119409T ES 94119409 T ES94119409 T ES 94119409T ES 2171432 T3 ES2171432 T3 ES 2171432T3
Authority
ES
Spain
Prior art keywords
image
histogram
entry
compared
determined
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
ES94119409T
Other languages
English (en)
Inventor
Michiyoshi Tachikawa
Toshio Miyazawa
Akihiko Hirano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Application granted granted Critical
Publication of ES2171432T3 publication Critical patent/ES2171432T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/40—Document-oriented image-based pattern recognition
    • G06V30/41—Analysis of document content
    • G06V30/414—Extracting the geometrical structure, e.g. layout tree; Block segmentation, e.g. bounding boxes for graphics or text
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/40—Extraction of image or video features
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/40—Extraction of image or video features
    • G06V10/50—Extraction of image or video features by performing operations within image blocks; by using histograms, e.g. histogram of oriented gradients [HoG]; by summing image-intensity values; Projection analysis
    • G06V10/507—Summing image-intensity values; Histogram projection analysis
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/40—Extraction of image or video features
    • G06V10/56—Extraction of image or video features relating to colour

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Computer Graphics (AREA)
  • Geometry (AREA)
  • Artificial Intelligence (AREA)
  • Image Analysis (AREA)

Abstract

SE OBTIENE UN RECTANGULO CIRCUNSCRITO DURANTE UNA PARTE DE LA IMAGEN CONTINUA NEGRA USANDO UNA SEÑAL DE IMAGEN DE DOS TONOS. SI SE DETERMINA (EN S105) QUE LA PARTE DE LA IMAGEN ES POSIBLEMENTE UNA QUE SE OBTENGA COMO RESULTADO DE LA ROTACION DEL OBJETO, SE COMPARAN LAS LONGITUDES DE LOS LADOS DE LA PARTE DE LA IMAGEN CON VALORES DE UMBRAL (EN S106 Y S108). SI SE DETERMINA (EN S105) QUE LA PARTE DE LA IMAGEN NO ES UNA QUE SE OBTENGA COMO RESULTADO DE LA ROTACION DEL OBJETO, LA ALTURA Y LA LONGITUD HORIZONTAL DEL RECTANGULO QUE SE CIRCUNSCRIBE SE COMPARAN CON LOS VALORES DE UMBRAL (EN S107 Y S108). ASI, SE DETERMINA (EN S115 Y S116) SI LA PARTE DE LA IMAGEN ES IDENTICA AL OBJETO O NO. SE PRODUCE UN HISTOGRAMA DE CROMACIDAD RGB PARA CADA UNA DE LAS REGIONES PEQUEÑAS DE UNA IMAGEN DE ENTRADA EN COLOR (EN S202A). CADA UNO DE LOS HISTOGRAMAS DE CROMACIDAD DE LAS REGIONES PEQUEÑAS SE COMPARA CON UNOS DE REFERENCIA (EN S202A). COMO RESULTADO DE LA COMPARACION, SE DA UN NUMERO DE IDENTIFICACION DELHISTOGRAMA DE REFERENCIA QUE TIENE LA MAYOR SIMILITUD A ESE DE LA REGION PEQUEÑA ENTRE AQUELLOS QUE CONSTITUYEN LA IMAGEN DE ENTRADA A LA REGION PEQUEÑA (EN S204). SE PRODUCE ASI UN HISTOGRAMA DE LOS NUMEROS DE IDENTIFICACION PARA LA ENTRADA DE LA IMAGEN EN COLOR (EN S204). EL HISTOGRAMA ASI PRODUCIDO SE USA PARA DETERMINAR (EN S205) CUAL DE ENTRE UNA PLURALIDAD DE OBJETOS ES IDENTICO A LA IMAGEN EN COLOR DE ENTRADA.
ES94119409T 1993-12-10 1994-12-08 Aparato y metodos para reconocer una imagen especifica a partir de una señal de imagen de entrada. Expired - Lifetime ES2171432T3 (es)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP31069493 1993-12-10
JP31069693 1993-12-10
JP1859194 1994-02-15
JP5228694 1994-03-23

Publications (1)

Publication Number Publication Date
ES2171432T3 true ES2171432T3 (es) 2002-09-16

Family

ID=27456996

Family Applications (1)

Application Number Title Priority Date Filing Date
ES94119409T Expired - Lifetime ES2171432T3 (es) 1993-12-10 1994-12-08 Aparato y metodos para reconocer una imagen especifica a partir de una señal de imagen de entrada.

Country Status (4)

Country Link
US (2) US6115495A (es)
EP (3) EP0657839B1 (es)
DE (3) DE69435214D1 (es)
ES (1) ES2171432T3 (es)

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Also Published As

Publication number Publication date
EP0657839B1 (en) 2002-02-20
EP0657839A2 (en) 1995-06-14
DE69435214D1 (de) 2009-08-06
EP1158453B1 (en) 2008-08-27
US6181820B1 (en) 2001-01-30
DE69429903T2 (de) 2002-10-10
US6115495A (en) 2000-09-05
EP0657839A3 (en) 1997-06-04
EP1158453A1 (en) 2001-11-28
EP1265190A1 (en) 2002-12-11
DE69429903D1 (de) 2002-03-28
EP1265190B1 (en) 2009-06-24
DE69435133D1 (de) 2008-10-09

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