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FR2484111B1 - Dispositif d'analyse optique d'un document et circuit de filtrage destine a un tel dispositif - Google Patents

Dispositif d'analyse optique d'un document et circuit de filtrage destine a un tel dispositif

Info

Publication number
FR2484111B1
FR2484111B1 FR8012597A FR8012597A FR2484111B1 FR 2484111 B1 FR2484111 B1 FR 2484111B1 FR 8012597 A FR8012597 A FR 8012597A FR 8012597 A FR8012597 A FR 8012597A FR 2484111 B1 FR2484111 B1 FR 2484111B1
Authority
FR
France
Prior art keywords
filtering circuit
document analysis
optical document
analysis device
optical
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
Application number
FR8012597A
Other languages
English (en)
Other versions
FR2484111A1 (fr
Inventor
Christian Defay
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR8012597A priority Critical patent/FR2484111B1/fr
Publication of FR2484111A1 publication Critical patent/FR2484111A1/fr
Application granted granted Critical
Publication of FR2484111B1 publication Critical patent/FR2484111B1/fr
Expired 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
    • G06V30/10—Character recognition
    • G06V30/16—Image preprocessing
    • G06V30/162—Quantising the image signal
    • 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
    • G06V30/10—Character recognition
    • G06V30/16—Image preprocessing
    • G06V30/164—Noise filtering
    • 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
    • G06V30/10—Character recognition
    • G06V30/20—Combination of acquisition, preprocessing or recognition functions
    • 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
    • G06V30/10—Character recognition

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Image Processing (AREA)
FR8012597A 1980-06-06 1980-06-06 Dispositif d'analyse optique d'un document et circuit de filtrage destine a un tel dispositif Expired FR2484111B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8012597A FR2484111B1 (fr) 1980-06-06 1980-06-06 Dispositif d'analyse optique d'un document et circuit de filtrage destine a un tel dispositif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8012597A FR2484111B1 (fr) 1980-06-06 1980-06-06 Dispositif d'analyse optique d'un document et circuit de filtrage destine a un tel dispositif

Publications (2)

Publication Number Publication Date
FR2484111A1 FR2484111A1 (fr) 1981-12-11
FR2484111B1 true FR2484111B1 (fr) 1986-05-09

Family

ID=9242780

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8012597A Expired FR2484111B1 (fr) 1980-06-06 1980-06-06 Dispositif d'analyse optique d'un document et circuit de filtrage destine a un tel dispositif

Country Status (1)

Country Link
FR (1) FR2484111B1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5035379B1 (fr) * 1970-05-25 1975-11-15
US3973239A (en) * 1973-10-17 1976-08-03 Hitachi, Ltd. Pattern preliminary processing system
IT1055651B (it) * 1975-11-03 1982-01-11 Elsag Sistema elettronico per la lettura di simboli
US4119947A (en) * 1977-07-20 1978-10-10 Howard Noyes Leighton Optical signal processor
DE2966353D1 (en) * 1978-09-28 1983-12-01 Kodak Ltd Electronic image enhancement

Also Published As

Publication number Publication date
FR2484111A1 (fr) 1981-12-11

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Legal Events

Date Code Title Description
ST Notification of lapse