BE875863A - Convertisseur auto-adaptatif en tout ou rien d'un signal d'analyse d'image - Google Patents

Convertisseur auto-adaptatif en tout ou rien d'un signal d'analyse d'image

Info

Publication number
BE875863A
BE875863A BE1/9371A BE1009371A BE875863A BE 875863 A BE875863 A BE 875863A BE 1/9371 A BE1/9371 A BE 1/9371A BE 1009371 A BE1009371 A BE 1009371A BE 875863 A BE875863 A BE 875863A
Authority
BE
Belgium
Prior art keywords
nothing
self
image analysis
analysis signal
adaptive converter
Prior art date
Application number
BE1/9371A
Other languages
English (en)
Original Assignee
Cit Alcatel
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 Cit Alcatel filed Critical Cit Alcatel
Publication of BE875863A publication Critical patent/BE875863A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/04—Measuring peak values or amplitude or envelope of AC or of pulses
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • G06V10/28—Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Manipulation Of Pulses (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Analogue/Digital Conversion (AREA)
BE1/9371A 1978-05-12 1979-04-26 Convertisseur auto-adaptatif en tout ou rien d'un signal d'analyse d'image BE875863A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7814216A FR2425780A1 (fr) 1978-05-12 1978-05-12 Convertisseur auto-adaptatif en tout ou rien d'un signal d'analyse d'image

Publications (1)

Publication Number Publication Date
BE875863A true BE875863A (fr) 1979-10-26

Family

ID=9208214

Family Applications (1)

Application Number Title Priority Date Filing Date
BE1/9371A BE875863A (fr) 1978-05-12 1979-04-26 Convertisseur auto-adaptatif en tout ou rien d'un signal d'analyse d'image

Country Status (10)

Country Link
US (1) US4247873A (fr)
JP (1) JPS54149511A (fr)
BE (1) BE875863A (fr)
CA (1) CA1126389A (fr)
DE (1) DE2918318A1 (fr)
FR (1) FR2425780A1 (fr)
GB (1) GB2020942B (fr)
IT (1) IT1118664B (fr)
LU (1) LU81244A1 (fr)
NL (1) NL7903558A (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337455A (en) * 1978-04-21 1982-06-29 Caere Corporation Apparatus for processing video signals received from an optical scanner
US4399469A (en) * 1980-04-23 1983-08-16 American Hoechst Corporation Imaging system and method with improved boundary detection
JPS5784670A (en) * 1980-11-17 1982-05-27 Fujitsu Ltd Video signal read-in system
JPS57188177A (en) * 1981-05-15 1982-11-19 Fuji Xerox Co Ltd Picture signal processing device
US4442544A (en) * 1981-07-09 1984-04-10 Xerox Corporation Adaptive thresholder
JPS5873280A (ja) * 1981-10-27 1983-05-02 Hitachi Ltd 信号２値化処理装置
US4674126A (en) * 1983-09-12 1987-06-16 Canon Kabushiki Kaisha Image signal processing apparatus
SE8404576L (sv) * 1983-09-23 1985-03-24 American Telephone & Telegraph Detaljdetektor for maskinvideo
JPS6079480A (ja) * 1983-10-07 1985-05-07 Fuji Xerox Co Ltd 画信号判別回路
US4600951A (en) * 1983-12-20 1986-07-15 At&T Technologies, Inc. Scanning sample, signal generation, data digitizing and retiming system
EP0360920B1 (fr) * 1988-09-30 1994-09-21 Computer Gesellschaft Konstanz Mbh Circuit pour obtenir le niveau de blanc pour le quantification en noir/blanc de signaux de balayage de photosenseurs simples
JPH02126771A (ja) * 1988-11-07 1990-05-15 Aisin Seiki Co Ltd 画像情報の２値化方法および装置
US5377282A (en) * 1991-09-19 1994-12-27 International Business Machines Corporation Optical inspection system utilizing dynamic analog-to-digital thresholding
US5396280A (en) * 1993-02-26 1995-03-07 International Business Machines, Corporation Analog video processing apparatus and method for eliminating background levels in the analog signal
ATA104797A (de) * 1997-06-17 1998-11-15 Siemens Ag Oesterreich Schaltungsanordnung zur binarisierung optischer muster

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415950A (en) * 1965-03-29 1968-12-10 Ibm Video quantizing system
US3534334A (en) 1967-06-20 1970-10-13 Ibm Automatic control of a threshold in the digitization of an analog signal
GB1383740A (en) 1971-02-25 1974-02-12 Image Analysing Computers Ltd Detection devices for image analysis systems
US3723649A (en) * 1971-04-27 1973-03-27 Electronic Image Syst Corp Adaptive binary state decision system
US3696253A (en) * 1971-06-07 1972-10-03 Bell Telephone Labor Inc Peak-to-peak alternating current signal detector
FR2223701A1 (en) * 1973-03-30 1974-10-25 Thomson Csf T Vt Sa Signal processor for document analysis - detects the waveform gradients using electronic cct. with AND-NOT gates
US3934136A (en) * 1974-05-06 1976-01-20 Minnesota Mining And Manufacturing Company Threshold signal circuitry for scanning apparatus
US3912943A (en) * 1974-08-09 1975-10-14 Ibm Video thresholder
US3976833A (en) * 1974-11-21 1976-08-24 Xerox Corporation Amplifier back-ground control apparatus for use in a document scanning system
US4001500A (en) * 1974-11-21 1977-01-04 Xerox Corporation Amplifier for use in a document scanning system

Also Published As

Publication number Publication date
IT1118664B (it) 1986-03-03
US4247873A (en) 1981-01-27
IT7968006A0 (it) 1979-05-11
JPS54149511A (en) 1979-11-22
DE2918318A1 (de) 1979-11-15
FR2425780A1 (fr) 1979-12-07
FR2425780B1 (fr) 1980-09-05
LU81244A1 (fr) 1979-12-07
CA1126389A (fr) 1982-06-22
NL7903558A (nl) 1979-11-14
GB2020942B (en) 1982-10-27
GB2020942A (en) 1979-11-21

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: CIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCAT

Effective date: 19840426