FR2211814A1 - - Google Patents

Info

Publication number
FR2211814A1
FR2211814A1 FR7342446A FR7342446A FR2211814A1 FR 2211814 A1 FR2211814 A1 FR 2211814A1 FR 7342446 A FR7342446 A FR 7342446A FR 7342446 A FR7342446 A FR 7342446A FR 2211814 A1 FR2211814 A1 FR 2211814A1
Authority
FR
France
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.)
Granted
Application number
FR7342446A
Other languages
French (fr)
Other versions
FR2211814B1 (es
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2211814A1 publication Critical patent/FR2211814A1/fr
Application granted granted Critical
Publication of FR2211814B1 publication Critical patent/FR2211814B1/fr
Expired legal-status Critical Current

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
    • G06—COMPUTING; CALCULATING OR 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/34—Analogue value compared with reference values
    • H03M1/36—Analogue value compared with reference values simultaneously only, i.e. parallel type
    • H03M1/361—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)
FR7342446A 1972-12-26 1973-11-20 Expired FR2211814B1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US31796472A 1972-12-26 1972-12-26

Publications (2)

Publication Number Publication Date
FR2211814A1 true FR2211814A1 (es) 1974-07-19
FR2211814B1 FR2211814B1 (es) 1976-06-25

Family

ID=23236028

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7342446A Expired FR2211814B1 (es) 1972-12-26 1973-11-20

Country Status (4)

Country Link
JP (1) JPS4991756A (es)
DE (1) DE2363124A1 (es)
FR (1) FR2211814B1 (es)
GB (1) GB1451917A (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2505479A1 (de) * 1975-02-10 1976-08-19 Siemens Ag Phasenkomparator und verfahren zu seinem betrieb

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2935619A (en) * 1954-12-29 1960-05-03 Ibm Data handling system
US3662341A (en) * 1970-09-25 1972-05-09 Ibm Video-derived segmentation-gating apparatus for optical character recognition

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2935619A (en) * 1954-12-29 1960-05-03 Ibm Data handling system
US3662341A (en) * 1970-09-25 1972-05-09 Ibm Video-derived segmentation-gating apparatus for optical character recognition

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
REVUE US 'IBM TECHNICAL DISCLOSURE BULLETIN', VOL. 15, N 2, JUILLET 1972, PAGES 370-371, ARTICLE 'ANALOG VIDEO DETECTOR BASED ON MULTILEVEL CONTRAST COMPARISONS' PAR D.C. CHANG *

Also Published As

Publication number Publication date
DE2363124A1 (de) 1974-06-27
GB1451917A (en) 1976-10-06
FR2211814B1 (es) 1976-06-25
JPS4991756A (es) 1974-09-02

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Legal Events

Date Code Title Description
ST Notification of lapse