JPS648488A - Image signal binarizing device - Google Patents

Image signal binarizing device

Info

Publication number
JPS648488A
JPS648488A JP62164465A JP16446587A JPS648488A JP S648488 A JPS648488 A JP S648488A JP 62164465 A JP62164465 A JP 62164465A JP 16446587 A JP16446587 A JP 16446587A JP S648488 A JPS648488 A JP S648488A
Authority
JP
Japan
Prior art keywords
output
circuit
comparator
prom
outputs
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
JP62164465A
Other languages
English (en)
Inventor
Yuji Katsuta
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP62164465A priority Critical patent/JPS648488A/ja
Priority to EP88110320A priority patent/EP0297516B1/en
Priority to DE3853234T priority patent/DE3853234T2/de
Priority to US07/212,672 priority patent/US4999629A/en
Publication of JPS648488A publication Critical patent/JPS648488A/ja
Pending 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
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
    • H04N1/4051—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Processing (AREA)
  • Character Input (AREA)
JP62164465A 1987-06-30 1987-06-30 Image signal binarizing device Pending JPS648488A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP62164465A JPS648488A (en) 1987-06-30 1987-06-30 Image signal binarizing device
EP88110320A EP0297516B1 (en) 1987-06-30 1988-06-28 Picture signal binarization system
DE3853234T DE3853234T2 (de) 1987-06-30 1988-06-28 Bildsignalbinarisierungssystem.
US07/212,672 US4999629A (en) 1987-06-30 1988-06-28 Two tone and multiple image discrimination and signal binarization system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62164465A JPS648488A (en) 1987-06-30 1987-06-30 Image signal binarizing device

Publications (1)

Publication Number Publication Date
JPS648488A true JPS648488A (en) 1989-01-12

Family

ID=15793694

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62164465A Pending JPS648488A (en) 1987-06-30 1987-06-30 Image signal binarizing device

Country Status (4)

Country Link
US (1) US4999629A (ja)
EP (1) EP0297516B1 (ja)
JP (1) JPS648488A (ja)
DE (1) DE3853234T2 (ja)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5229868A (en) * 1989-08-25 1993-07-20 Matsushita Electric Industrial Co., Ltd. Method and apparatus for converting a line density of a bi-level image signal
US5577136A (en) * 1989-09-27 1996-11-19 Canon Kabushiki Kaisha Image processing apparatus
EP0426435B1 (en) * 1989-10-31 1997-01-15 Canon Kabushiki Kaisha Image forming apparatus for halftone reproduction
JPH0491966A (ja) * 1990-08-08 1992-03-25 Canon Inc 印刷装置
JP3031994B2 (ja) * 1990-11-16 2000-04-10 株式会社東芝 画像処理装置
JP2859450B2 (ja) * 1991-01-31 1999-02-17 富士写真フイルム株式会社 画像記録装置及び画像記録方法
US5235434A (en) * 1991-06-27 1993-08-10 Polaroid Corporation Method and apparatus for selectively adjusting the brightness of large regions of an image
JP3313447B2 (ja) * 1993-03-19 2002-08-12 株式会社リコー 画像処理装置
US5659402A (en) * 1994-01-14 1997-08-19 Mita Industrial Co., Ltd. Image processing method and apparatus
KR0181129B1 (ko) * 1995-06-17 1999-05-01 김광호 화상처리장치의 화소 이치화 장치 및 방법
US6137589A (en) * 1995-09-20 2000-10-24 Hewlett-Packard Company Efficient storage of dithered raster image data in a printer or the like
US5870505A (en) * 1996-03-14 1999-02-09 Polaroid Corporation Method and apparatus for pixel level luminance adjustment
US7152947B2 (en) * 2004-03-08 2006-12-26 Hewlett-Packard Development Company, L.P. Selecting modes for printing
US20050219278A1 (en) * 2004-03-30 2005-10-06 Hudson Kevin R Image formation with a flexible number of passes
US7168784B2 (en) * 2004-03-30 2007-01-30 Hewlett-Packard Development Company, L.P. Formation of images

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5668873A (en) * 1979-11-08 1981-06-09 Fujitsu Ltd Picture signal binary system
JPS6038977A (ja) * 1983-08-12 1985-02-28 Toshiba Corp 画像信号処理装置
JPS6238989A (ja) * 1985-08-13 1987-02-19 Seiko Instr & Electronics Ltd フイルタ回路

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5438727A (en) * 1977-09-02 1979-03-23 Hitachi Denshi Ltd Floating threshold level binary encoding circuit
JPS5537092A (en) * 1978-09-05 1980-03-14 Ibm Mode switch for setting threshold value
US4259694A (en) * 1979-08-24 1981-03-31 Xerox Corporation Electronic rescreen technique for halftone pictures
JPS56143765A (en) * 1980-04-10 1981-11-09 Canon Inc Processor for video signal
US4389677A (en) * 1980-12-08 1983-06-21 Ncr Canada Ltd - Ncr Canada Ltee Method and apparatus for removing erroneous elements from digital images
JPS592483A (ja) * 1982-06-28 1984-01-09 Fujitsu Ltd 画像領域分離方式
JPS59223073A (ja) * 1983-06-01 1984-12-14 Canon Inc 画像処理装置
US4903316A (en) * 1986-05-16 1990-02-20 Fuji Electric Co., Ltd. Binarizing apparatus
JP2659198B2 (ja) * 1986-11-12 1997-09-30 日本電気株式会社 画像２値化装置
US4853792A (en) * 1987-02-04 1989-08-01 Sharp Kabushiki Kaisha Image signal binary encoder
JP2702928B2 (ja) * 1987-06-19 1998-01-26 株式会社日立製作所 画像入力装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5668873A (en) * 1979-11-08 1981-06-09 Fujitsu Ltd Picture signal binary system
JPS6038977A (ja) * 1983-08-12 1985-02-28 Toshiba Corp 画像信号処理装置
JPS6238989A (ja) * 1985-08-13 1987-02-19 Seiko Instr & Electronics Ltd フイルタ回路

Also Published As

Publication number Publication date
DE3853234D1 (de) 1995-04-13
US4999629A (en) 1991-03-12
EP0297516A2 (en) 1989-01-04
EP0297516A3 (en) 1992-03-04
DE3853234T2 (de) 1995-10-26
EP0297516B1 (en) 1995-03-08

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