JPS57104369A - Binary device for picture with contrast - Google Patents

Binary device for picture with contrast

Info

Publication number
JPS57104369A
JPS57104369A JP55181600A JP18160080A JPS57104369A JP S57104369 A JPS57104369 A JP S57104369A JP 55181600 A JP55181600 A JP 55181600A JP 18160080 A JP18160080 A JP 18160080A JP S57104369 A JPS57104369 A JP S57104369A
Authority
JP
Japan
Prior art keywords
data
rom12
bit
binary data
past
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.)
Granted
Application number
JP55181600A
Other languages
Japanese (ja)
Other versions
JPH0366873B2 (en
Inventor
Yoshiaki Kurosawa
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55181600A priority Critical patent/JPS57104369A/en
Publication of JPS57104369A publication Critical patent/JPS57104369A/en
Publication of JPH0366873B2 publication Critical patent/JPH0366873B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color, Gradation (AREA)
  • Image Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Dot-Matrix Printers And Others (AREA)

Abstract

PURPOSE:To binarize a contrast picture, by a specified weighting processing based on past binary data, outputting a present input video signal with binarization, and feeding it back as a past binary data. CONSTITUTION:A line scanning input is inputted at an AD converter 11 as n-bit digital data and an address data of a ROM12. One-bit data from the ROM12 is applied to an output device and given to shift registers 14-17 with delay of 2- sample by a shift register 13. One bit data at 5-sample position is outputted in parallel from registers 15, 17. A parallel 12-bit data from the regsiters 13, 15, 17 becomes an address data for the ROM12. Thus, the ROM12 is addressed with the address data bit of 12+n to obtain a binary data of a present input video signal weighted based on the past binary data.
JP55181600A 1980-12-22 1980-12-22 Binary device for picture with contrast Granted JPS57104369A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55181600A JPS57104369A (en) 1980-12-22 1980-12-22 Binary device for picture with contrast

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55181600A JPS57104369A (en) 1980-12-22 1980-12-22 Binary device for picture with contrast

Publications (2)

Publication Number Publication Date
JPS57104369A true JPS57104369A (en) 1982-06-29
JPH0366873B2 JPH0366873B2 (en) 1991-10-18

Family

ID=16103636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55181600A Granted JPS57104369A (en) 1980-12-22 1980-12-22 Binary device for picture with contrast

Country Status (1)

Country Link
JP (1) JPS57104369A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0382581A2 (en) * 1989-02-10 1990-08-16 Canon Kabushiki Kaisha Image processing apparatus
JPH02210959A (en) * 1989-02-10 1990-08-22 Canon Inc Picture processor
JPH02210963A (en) * 1989-02-10 1990-08-22 Canon Inc Picture processor
JPH02210961A (en) * 1989-02-10 1990-08-22 Canon Inc Picture processor
US5121447A (en) * 1989-04-27 1992-06-09 Canon Kabushiki Kaisha Apparatus for performing gradation processing on image data
US5153925A (en) * 1989-04-27 1992-10-06 Canon Kabushiki Kaisha Image processing apparatus
US5161036A (en) * 1989-12-15 1992-11-03 Kabushiki Kaisha Toshiba Picture digitizing system using randomly varied binary threshold data
US5200839A (en) * 1990-08-31 1993-04-06 Canon Kabushiki Kaisha Image processing apparatus
US5577136A (en) * 1989-09-27 1996-11-19 Canon Kabushiki Kaisha Image processing apparatus
US5825940A (en) * 1995-01-23 1998-10-20 Canon Kabushiki Kaisha Image processing method and apparatus for binary-coding multivalue image data
US6134355A (en) * 1989-02-10 2000-10-17 Canon Kabushiki Kaisha Binarization using a local average, and using error diffusion
US6285464B1 (en) 1987-11-16 2001-09-04 Canon Kabushiki Kaisha Apparatus and method for producing a half-tone image
JP2011062922A (en) * 2009-09-17 2011-03-31 Naltec Inc Method and apparatus for recording in multi-gradation

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6285464B1 (en) 1987-11-16 2001-09-04 Canon Kabushiki Kaisha Apparatus and method for producing a half-tone image
US6134355A (en) * 1989-02-10 2000-10-17 Canon Kabushiki Kaisha Binarization using a local average, and using error diffusion
JPH02210959A (en) * 1989-02-10 1990-08-22 Canon Inc Picture processor
JPH02210963A (en) * 1989-02-10 1990-08-22 Canon Inc Picture processor
JPH02210961A (en) * 1989-02-10 1990-08-22 Canon Inc Picture processor
EP0382581A2 (en) * 1989-02-10 1990-08-16 Canon Kabushiki Kaisha Image processing apparatus
US5121447A (en) * 1989-04-27 1992-06-09 Canon Kabushiki Kaisha Apparatus for performing gradation processing on image data
US5153925A (en) * 1989-04-27 1992-10-06 Canon Kabushiki Kaisha Image processing apparatus
US5577136A (en) * 1989-09-27 1996-11-19 Canon Kabushiki Kaisha Image processing apparatus
US5161036A (en) * 1989-12-15 1992-11-03 Kabushiki Kaisha Toshiba Picture digitizing system using randomly varied binary threshold data
US5200839A (en) * 1990-08-31 1993-04-06 Canon Kabushiki Kaisha Image processing apparatus
US5825940A (en) * 1995-01-23 1998-10-20 Canon Kabushiki Kaisha Image processing method and apparatus for binary-coding multivalue image data
JP2011062922A (en) * 2009-09-17 2011-03-31 Naltec Inc Method and apparatus for recording in multi-gradation

Also Published As

Publication number Publication date
JPH0366873B2 (en) 1991-10-18

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