JPS632397B2 - - Google Patents

Info

Publication number
JPS632397B2
JPS632397B2 JP56185623A JP18562381A JPS632397B2 JP S632397 B2 JPS632397 B2 JP S632397B2 JP 56185623 A JP56185623 A JP 56185623A JP 18562381 A JP18562381 A JP 18562381A JP S632397 B2 JPS632397 B2 JP S632397B2
Authority
JP
Japan
Prior art keywords
pixel
continuous tone
document
line
information
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.)
Expired
Application number
JP56185623A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57125580A (en
Inventor
Jeaado Fuotsukusu Shidonii
Jei Iesukeru Fuiritsupu
Jon Jinmaaman Junia Uiriamu
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 JPS57125580A publication Critical patent/JPS57125580A/ja
Publication of JPS632397B2 publication Critical patent/JPS632397B2/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
    • H04N1/40062—Discrimination between different image types, e.g. two-tone, continuous tone
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/40—Document-oriented image-based pattern recognition
    • G06V30/41—Analysis of document content
    • G06V30/413—Classification of content, e.g. text, photographs or tables
    • 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)
  • Computer Vision & Pattern Recognition (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Artificial Intelligence (AREA)
  • Theoretical Computer Science (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color, Gradation (AREA)
  • Image Processing (AREA)
  • Image Analysis (AREA)
  • Dot-Matrix Printers And Others (AREA)
JP56185623A 1981-01-02 1981-11-20 Threshould processing mode switch Granted JPS57125580A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22210381A 1981-01-02 1981-01-02

Publications (2)

Publication Number Publication Date
JPS57125580A JPS57125580A (en) 1982-08-04
JPS632397B2 true JPS632397B2 (en]) 1988-01-19

Family

ID=22830839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56185623A Granted JPS57125580A (en) 1981-01-02 1981-11-20 Threshould processing mode switch

Country Status (3)

Country Link
EP (1) EP0055834A3 (en])
JP (1) JPS57125580A (en])
CA (1) CA1182554A (en])

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4554593A (en) * 1981-01-02 1985-11-19 International Business Machines Corporation Universal thresholder/discriminator
DE3364212D1 (en) * 1982-11-30 1986-07-24 Toshiba Kk Picture signal processing system suitable for displaying continuous tone pictures
JPH0685186B2 (ja) * 1983-01-25 1994-10-26 利之 坂井 写真領域識別装置
JPS59156070A (ja) * 1983-02-25 1984-09-05 Canon Inc 画像処理装置
GB2153619B (en) * 1983-12-26 1988-01-20 Canon Kk Image processing apparatus
JPS60149260A (ja) * 1984-01-17 1985-08-06 Hitachi Ltd 画像情報二値化回路
JPH0669212B2 (ja) * 1984-02-20 1994-08-31 日本電気株式会社 適応擬似中間調化回路
JPH0614685B2 (ja) * 1984-03-29 1994-02-23 株式会社東芝 画像信号処理装置
JPS6191772A (ja) * 1984-10-11 1986-05-09 Canon Inc 画像処理装置
JPS6198069A (ja) * 1984-10-19 1986-05-16 Canon Inc 画像処理装置
JPH0685561B2 (ja) * 1985-10-31 1994-10-26 株式会社リコー デジタル複写装置
GB2170373B (en) * 1984-12-28 1989-03-15 Canon Kk Image processing apparatus
JPS6297080A (ja) * 1985-10-23 1987-05-06 Yokogawa Electric Corp 画像信号２値化回路
US4856075A (en) * 1987-10-05 1989-08-08 Eastman Kodak Company Image discrimination
US4862283A (en) * 1987-11-02 1989-08-29 Eastman Kodak Company Image discrimination with continuous tone area thinning
JP2744619B2 (ja) * 1988-06-28 1998-04-28 富士通株式会社 画像処理装置
EP0447541B1 (en) * 1989-10-10 1998-06-10 Unisys Corporation Image data processor system and method
JP3157731B2 (ja) 1996-12-04 2001-04-16 新潟日本電気株式会社 インクジェット記録装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3723649A (en) * 1971-04-27 1973-03-27 Electronic Image Syst Corp Adaptive binary state decision system
GB2025730B (en) * 1978-07-14 1983-02-16 Information Int Inc Forming halftone images
JPS5537092A (en) * 1978-09-05 1980-03-14 Ibm Mode switch for setting threshold value
US4194221A (en) * 1978-12-26 1980-03-18 Xerox Corporation Automatic multimode continuous halftone line copy reproduction
JPS5593365A (en) * 1979-01-09 1980-07-15 Ricoh Co Ltd Judging method for video quality
JPS55133182A (en) * 1979-04-03 1980-10-16 Ricoh Co Ltd Picture processing unit
JPS55147073A (en) * 1979-05-04 1980-11-15 Mitsubishi Electric Corp Picture coding unit

Also Published As

Publication number Publication date
EP0055834A2 (en) 1982-07-14
JPS57125580A (en) 1982-08-04
EP0055834A3 (en) 1986-02-05
CA1182554A (en) 1985-02-12

Similar Documents

Publication Publication Date Title
JPS6118380B2 (en])
JP2744619B2 (ja) 画像処理装置
JPS632397B2 (en])
US4924509A (en) Image processing apparatus
US5016118A (en) Image determining method and apparatus
US4786976A (en) Image processing apparatus
US5339172A (en) Apparatus and method for segmenting an input image in one of a plurality of modes
US20010016065A1 (en) Image processing apparatus for discriminating image field of original document plural times and method therefor
JP2005174363A (ja) デジタル画像処理システム
JPH02502419A (ja) イメージ識別
EP0340283B1 (en) Image discrimination with continuous tone area thinning
US5812695A (en) Automatic typing of raster images using density slicing
JPH11298716A (ja) 画像処理装置
JPH0730752A (ja) 画像領域判別装置
CA2215555C (en) Image processing device
JPS6359272A (ja) 画像処理装置
JP2629699B2 (ja) 画像領域識別装置
KR910006683B1 (ko) 화상처리장치
JP2697860B2 (ja) 画像処理装置
JPH0227369A (ja) カラー画像処理装置
JPS61150574A (ja) 中間調記録装置
JPH1051629A (ja) ファクシミリ装置
JPS6335071A (ja) 変倍方法
JPS6032475A (ja) 画像処理装置
JPH05191642A (ja) 画像出力装置