JPS5775379A - Quantizing circuit - Google Patents

Quantizing circuit

Info

Publication number
JPS5775379A
JPS5775379A JP55150762A JP15076280A JPS5775379A JP S5775379 A JPS5775379 A JP S5775379A JP 55150762 A JP55150762 A JP 55150762A JP 15076280 A JP15076280 A JP 15076280A JP S5775379 A JPS5775379 A JP S5775379A
Authority
JP
Japan
Prior art keywords
converter
tone
output
gradation
quantization
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.)
Pending
Application number
JP55150762A
Other languages
Japanese (ja)
Inventor
Norio Kanemitsu
Shiyouji Takahashi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55150762A priority Critical patent/JPS5775379A/en
Publication of JPS5775379A publication Critical patent/JPS5775379A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Character Input (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To ensure the effective use of a small number of tone wedges of quantization, by changing how to set the tone wedge according to the gradation of characters. CONSTITUTION:The width of a tone wedge is varied for quantization in accordance with the gradation of a picture when the picture output to be optically read is converted into an electric signal and then into a digital signal. For instance, converters 10a-10n are set in parallel to each other in an A/D converter and the input analog signal is supplied to each converter. At the same time, the white level input receives a division of voltasge through resistances 11a-11n and converted into a reference signal. This reference signal is applied to the other input terminal of each converter. Then a resistance 13 is varied by a transistor 12 to change the width of the tone wedge. The output of each converter is coded by an encoder 14 and turned into a quantized video output of 4 bits and 16 tone wedges.
JP55150762A 1980-10-29 1980-10-29 Quantizing circuit Pending JPS5775379A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55150762A JPS5775379A (en) 1980-10-29 1980-10-29 Quantizing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55150762A JPS5775379A (en) 1980-10-29 1980-10-29 Quantizing circuit

Publications (1)

Publication Number Publication Date
JPS5775379A true JPS5775379A (en) 1982-05-11

Family

ID=15503851

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55150762A Pending JPS5775379A (en) 1980-10-29 1980-10-29 Quantizing circuit

Country Status (1)

Country Link
JP (1) JPS5775379A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6024406A (en) * 1983-07-20 1985-02-07 Kawasaki Steel Corp Surface-irregularity analyzing device
JPS60125060A (en) * 1983-12-09 1985-07-04 Canon Inc Image signal processor
JPS60125064A (en) * 1983-12-09 1985-07-04 Canon Inc Image signal processor
JPS61115182A (en) * 1984-11-10 1986-06-02 Nec Corp Graphic quantization device
JPS61205081A (en) * 1985-03-08 1986-09-11 Casio Comput Co Ltd Analog-to-digital converting circuit for video signal
JPS6368065U (en) * 1982-09-27 1988-05-07

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6368065U (en) * 1982-09-27 1988-05-07
JPS6024406A (en) * 1983-07-20 1985-02-07 Kawasaki Steel Corp Surface-irregularity analyzing device
JPS60125060A (en) * 1983-12-09 1985-07-04 Canon Inc Image signal processor
JPS60125064A (en) * 1983-12-09 1985-07-04 Canon Inc Image signal processor
JPH0515104B2 (en) * 1983-12-09 1993-02-26 Canon Kk
JPS61115182A (en) * 1984-11-10 1986-06-02 Nec Corp Graphic quantization device
JPS61205081A (en) * 1985-03-08 1986-09-11 Casio Comput Co Ltd Analog-to-digital converting circuit for video signal

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