DE2648641C3 - Elektronische Anordnung zum Lesen von Zeichen - Google Patents

Elektronische Anordnung zum Lesen von Zeichen

Info

Publication number
DE2648641C3
DE2648641C3 DE2648641A DE2648641A DE2648641C3 DE 2648641 C3 DE2648641 C3 DE 2648641C3 DE 2648641 A DE2648641 A DE 2648641A DE 2648641 A DE2648641 A DE 2648641A DE 2648641 C3 DE2648641 C3 DE 2648641C3
Authority
DE
Germany
Prior art keywords
signal
signals
contrast
arrangement according
raster
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
DE2648641A
Other languages
German (de)
English (en)
Other versions
DE2648641B2 (de
DE2648641A1 (de
Inventor
Ercole Genua Giuliano
Orazio La Spezia Paita
Luigi Arenzano Genua Stringa
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.)
ELETTRONICA SAN GIORGIO - ELSAG SpA GENUA-SESTRI (ITALIEN)
Original Assignee
ELETTRONICA SAN GIORGIO - ELSAG SpA GENUA-SESTRI (ITALIEN)
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 ELETTRONICA SAN GIORGIO - ELSAG SpA GENUA-SESTRI (ITALIEN) filed Critical ELETTRONICA SAN GIORGIO - ELSAG SpA GENUA-SESTRI (ITALIEN)
Publication of DE2648641A1 publication Critical patent/DE2648641A1/de
Publication of DE2648641B2 publication Critical patent/DE2648641B2/de
Application granted granted Critical
Publication of DE2648641C3 publication Critical patent/DE2648641C3/de
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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Image Analysis (AREA)
  • Character Input (AREA)
  • Image Processing (AREA)
  • Image Input (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
DE2648641A 1975-11-03 1976-10-27 Elektronische Anordnung zum Lesen von Zeichen Expired DE2648641C3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT69715/75A IT1055651B (it) 1975-11-03 1975-11-03 Sistema elettronico per la lettura di simboli

Publications (3)

Publication Number Publication Date
DE2648641A1 DE2648641A1 (de) 1977-05-26
DE2648641B2 DE2648641B2 (de) 1979-09-20
DE2648641C3 true DE2648641C3 (de) 1980-07-03

Family

ID=11312685

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2648641A Expired DE2648641C3 (de) 1975-11-03 1976-10-27 Elektronische Anordnung zum Lesen von Zeichen

Country Status (14)

Country Link
US (1) US4047152A (ref)
JP (1) JPS5286734A (ref)
AU (1) AU498123B2 (ref)
BE (1) BE847800A (ref)
CA (1) CA1066806A (ref)
DE (1) DE2648641C3 (ref)
DK (1) DK147837C (ref)
FR (1) FR2330084A1 (ref)
GB (1) GB1520368A (ref)
IT (1) IT1055651B (ref)
NL (1) NL166564C (ref)
NO (1) NO149903C (ref)
SE (1) SE434441B (ref)
ZA (1) ZA766388B (ref)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4433380A (en) * 1975-11-25 1984-02-21 Philips Medical Systems, Inc. Tomographic scanner
JPS5375735A (en) * 1976-12-16 1978-07-05 Hajime Sangyo Information processor
US4162481A (en) * 1976-12-22 1979-07-24 Recognition Equipment Incorporated Adaptive correlator for video processing
US4124870A (en) * 1977-03-31 1978-11-07 International Business Machines Corporation Method for improving print quality of coarse-scan/fine-print character reproduction
US4193096A (en) * 1977-04-04 1980-03-11 Xerox Corporation Half tone encoder/decoder
US4119947A (en) * 1977-07-20 1978-10-10 Howard Noyes Leighton Optical signal processor
JPS5537092A (en) * 1978-09-05 1980-03-14 Ibm Mode switch for setting threshold value
SE422714B (sv) * 1979-01-16 1982-03-22 Ibm Svenska Ab Anordning med styrdator for optisk teckenlosning, vilken styrdator bl a bereknar startpunkter for identifiering av ett tecken
US4290049A (en) * 1979-09-10 1981-09-15 Environmental Research Institute Of Michigan Dynamic data correction generator for an image analyzer system
US4464788A (en) * 1979-09-10 1984-08-07 Environmental Research Institute Of Michigan Dynamic data correction generator for an image analyzer system
FR2466153A1 (fr) * 1979-09-21 1981-03-27 Thomson Csf Dispositif de decision noir ou blanc a seuil autoadaptatif pour systeme d'analyse de document et emetteur de telecopie comportant un tel dispositif
US4298858A (en) * 1980-03-27 1981-11-03 The United States Of America As Represented By The Secretary Of The Air Force Method and apparatus for augmenting binary patterns
FR2484111B1 (fr) * 1980-06-06 1986-05-09 Thomson Csf Dispositif d'analyse optique d'un document et circuit de filtrage destine a un tel dispositif
US4408343A (en) * 1981-02-27 1983-10-04 Burroughs Corporation Image enhancement for optical character readers
US4516263A (en) * 1982-04-30 1985-05-07 The Charles Stark Draper Laboratory, Inc. Spatially integral, video signal processor
US4685145A (en) * 1984-12-07 1987-08-04 Fingermatrix, Inc. Conversion of an image represented by a field of pixels in a gray scale to a field of pixels in binary scale
US4723298A (en) * 1985-03-27 1988-02-02 Fingermatrix, Inc. Image compression technique
US4969198A (en) * 1986-04-17 1990-11-06 International Business Machines Corporation System for automatic inspection of periodic patterns
US4771468A (en) * 1986-04-17 1988-09-13 International Business Machines Corporation System for automatic inspection of periodic patterns
US4806741A (en) * 1986-07-16 1989-02-21 Telesis Controls Corporation Electronic code enhancement for code readers
AU597134B2 (en) * 1986-11-25 1990-05-24 Pedna Pty. Limited Digital image acquisition system
US4811414A (en) * 1987-02-27 1989-03-07 C.F.A. Technologies, Inc. Methods for digitally noise averaging and illumination equalizing fingerprint images
US4933976A (en) * 1988-01-25 1990-06-12 C.F.A. Technologies, Inc. System for generating rolled fingerprint images
US5647026A (en) * 1991-10-29 1997-07-08 Eastman Kodak Company Uniformity correction and threshold or halftoning conversion unit and method
US5474827A (en) * 1994-03-23 1995-12-12 Minnesota Mining And Manufacturing Company Retroreflective article and method of making the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3778768A (en) * 1971-08-27 1973-12-11 Little Inc A Character detection system
US3737855A (en) * 1971-09-30 1973-06-05 Ibm Character video enhancement system
US4003024A (en) * 1975-10-14 1977-01-11 Rockwell International Corporation Two-dimensional binary data enhancement system

Also Published As

Publication number Publication date
SE434441B (sv) 1984-07-23
FR2330084B1 (ref) 1979-07-20
DE2648641B2 (de) 1979-09-20
NO149903B (no) 1984-04-02
NL166564C (nl) 1981-08-17
DK147837B (da) 1984-12-17
DE2648641A1 (de) 1977-05-26
FR2330084A1 (fr) 1977-05-27
DK478476A (da) 1977-05-04
ZA766388B (en) 1977-10-26
IT1055651B (it) 1982-01-11
DK147837C (da) 1985-06-24
NO149903C (no) 1984-07-11
SE7610785L (sv) 1977-05-04
US4047152A (en) 1977-09-06
CA1066806A (en) 1979-11-20
GB1520368A (en) 1978-08-09
BE847800A (fr) 1977-02-14
NL7612165A (nl) 1977-05-05
AU1887976A (en) 1978-04-27
AU498123B2 (en) 1979-02-08
NL166564B (nl) 1981-03-16
JPS5286734A (en) 1977-07-19
NO763635L (ref) 1977-05-04

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Legal Events

Date Code Title Description
BI Miscellaneous see part 2
C3 Grant after two publication steps (3rd publication)
8339 Ceased/non-payment of the annual fee