BE636525A - - Google Patents

Info

Publication number
BE636525A
BE636525A BE636525DA BE636525A BE 636525 A BE636525 A BE 636525A BE 636525D A BE636525D A BE 636525DA BE 636525 A BE636525 A BE 636525A
Authority
BE
Belgium
Application number
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.)
Publication date
Publication of BE636525A publication Critical patent/BE636525A/xx

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
    • H04N1/40087—Multi-toning, i.e. converting a continuous-tone signal for reproduction with more than two discrete brightnesses or optical densities, e.g. dots of grey and black inks on white paper
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/003—Changing the DC level
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/01—Shaping pulses
    • H03K5/12—Shaping pulses by steepening leading or trailing edges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
    • H04N5/208—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Nonlinear Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Theoretical Computer Science (AREA)
  • Discrete Mathematics (AREA)
  • Picture Signal Circuits (AREA)
BE636525D 1962-09-07 BE636525A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US222002A US3181007A (en) 1962-09-07 1962-09-07 Automatic contrast circuit employing two cascaded difference amplifiers for changing slope of information signal

Publications (1)

Publication Number Publication Date
BE636525A true BE636525A (ja) 1900-01-01

Family

ID=22830326

Family Applications (1)

Application Number Title Priority Date Filing Date
BE636525D BE636525A (ja) 1962-09-07

Country Status (2)

Country Link
US (1) US3181007A (ja)
BE (1) BE636525A (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365587A (en) * 1968-01-23 Gen Electric Circuit for generating large pulses of electrical currents having short rise and fall times
US3312837A (en) * 1964-04-08 1967-04-04 Honeywell Inc Trapezoidal waveform generator
US3458719A (en) * 1965-10-14 1969-07-29 Ibm Threshold logic switch with a feed-back current path
US3838297A (en) * 1973-06-14 1974-09-24 Burroughs Corp Pulse shaping circuit
UST943004I4 (ja) * 1974-07-30 1976-02-03
US4231065A (en) * 1979-01-11 1980-10-28 Honeywell Inc. Local area contrast enhancement device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1112543B (de) * 1959-02-14 1961-08-10 Philips Nv Schaltungsanordnung zur selbsttaetigen raumlichtabhaengigen Regelung der Helligkeit und des Kontrastes bei einem Fernsehempfaenger
US3007060A (en) * 1959-03-23 1961-10-31 Gen Dynamics Corp Circuitry for independently delaying the leading and trailing edges of an input pulse
DE1093814B (de) * 1959-04-07 1960-12-01 Standard Elektrik Lorenz Ag Verfahren zur automatischen Kontrastregelung von Fernsehgeraeten
US3007055A (en) * 1960-07-21 1961-10-31 Rca Corp Test signal generator with circuit means to separately adjust rise and fall time of the output pulses
NL278226A (ja) * 1961-05-10

Also Published As

Publication number Publication date
US3181007A (en) 1965-04-27

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