JPS6342902B2 - - Google Patents

Info

Publication number
JPS6342902B2
JPS6342902B2 JP55112270A JP11227080A JPS6342902B2 JP S6342902 B2 JPS6342902 B2 JP S6342902B2 JP 55112270 A JP55112270 A JP 55112270A JP 11227080 A JP11227080 A JP 11227080A JP S6342902 B2 JPS6342902 B2 JP S6342902B2
Authority
JP
Japan
Prior art keywords
bits
row
difference
bit
column
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
JP55112270A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5633648A (en
Inventor
Eichi Riao Henrii
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.)
Xerox Corp
Original Assignee
Xerox 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 Xerox Corp filed Critical Xerox Corp
Publication of JPS5633648A publication Critical patent/JPS5633648A/ja
Publication of JPS6342902B2 publication Critical patent/JPS6342902B2/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
    • H04N1/409—Edge or detail enhancement; Noise or error suppression
    • H04N1/4092—Edge or detail enhancement
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/90—Dynamic range modification of images or parts thereof
    • G06T5/92—Dynamic range modification of images or parts thereof based on global image properties
    • 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
    • H04N1/40075—Descreening, i.e. converting a halftone signal into a corresponding continuous-tone signal; Rescreening, i.e. combined descreening and halftoning

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)
JP11227080A 1979-08-24 1980-08-14 Renetting circuit Granted JPS5633648A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/069,444 US4259694A (en) 1979-08-24 1979-08-24 Electronic rescreen technique for halftone pictures

Publications (2)

Publication Number Publication Date
JPS5633648A JPS5633648A (en) 1981-04-04
JPS6342902B2 true JPS6342902B2 (enExample) 1988-08-26

Family

ID=22089010

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11227080A Granted JPS5633648A (en) 1979-08-24 1980-08-14 Renetting circuit

Country Status (4)

Country Link
US (1) US4259694A (enExample)
EP (1) EP0024902B1 (enExample)
JP (1) JPS5633648A (enExample)
DE (1) DE3069867D1 (enExample)

Families Citing this family (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1123365B (it) * 1978-09-28 1986-04-30 Eastman Kodak Co Impianto elettronico di trattamento di immagini
US4463381A (en) * 1980-04-16 1984-07-31 Eastman Kodak Company Image processing apparatus including a partitioned low pass channel
US4446484A (en) * 1981-04-16 1984-05-01 Eastman Kodak Company Image gradient detectors operating in a partitioned low-pass channel
BE889996A (nl) * 1981-08-18 1981-12-16 Belge Lampes Mat Electr Mble Facsimile overdrachtsinrichting
US4486785A (en) * 1982-09-30 1984-12-04 International Business Machines Corporation Enhancement of video images by selective introduction of gray-scale pels
EP0422688B1 (en) * 1983-03-08 1996-06-12 Canon Kabushiki Kaisha Image processing apparatus
EP0144315B1 (en) * 1983-06-03 1991-02-06 Gravure Association of America, Inc. Screen gravure engraving method for electromechanical engravers
US4546385A (en) * 1983-06-30 1985-10-08 International Business Machines Corporation Data compression method for graphics images
JPS60120482A (ja) * 1983-12-02 1985-06-27 Canon Inc 画像信号処理装置
US4577235A (en) * 1984-08-20 1986-03-18 The Mead Corporation Text/continuous tone image decision processor
US4638369A (en) * 1984-09-04 1987-01-20 Xerox Corporation Edge extraction technique
US4783838A (en) * 1984-12-26 1988-11-08 Konishiroku Photo Industry Co., Ltd. Image processing method and apparatus therefor
GB2170373B (en) * 1984-12-28 1989-03-15 Canon Kk Image processing apparatus
US4758897A (en) 1985-04-30 1988-07-19 Konishiroku Photo Industry Co., Ltd. Method and apparatus for estimating halftone image from binary image
NL8501844A (nl) * 1985-06-27 1987-01-16 Oce Nederland B V Patents And Werkwijze voor het vergroten/verkleinen van een ditherbeeld.
NL8501846A (nl) * 1985-06-27 1987-01-16 Oce Nederland B V Patents And Werkwijze voor het reconstrueren van een grijswaardenbeeld uit een ditherbeeld.
NL8501845A (nl) * 1985-06-27 1987-01-16 Oce Nederland B V Patents And Werkwijze voor het vergroten/verkleinen van ditherbeelden.
JPH0799543B2 (ja) * 1985-10-22 1995-10-25 キヤノン株式会社 画像処理装置
DE3752330T2 (de) * 1986-02-14 2001-10-31 Canon K.K., Tokio/Tokyo Bildverarbeitungsvorrichtung
JPS648488A (en) * 1987-06-30 1989-01-12 Sharp Kk Image signal binarizing device
GB8718100D0 (en) * 1987-07-30 1987-09-03 Crosfield Electronics Ltd Image processing
DE3839299C2 (de) * 1987-11-20 1995-06-01 Canon Kk Bildverarbeitungseinrichtung
US4849679A (en) * 1987-12-31 1989-07-18 Westinghouse Electric Corp. Image processing system for an optical seam tracker
JPH0683356B2 (ja) * 1988-01-19 1994-10-19 株式会社日立製作所 画像情報記録装置
US4926267A (en) * 1989-05-26 1990-05-15 Nynex Corporation Reproduction of halftone original with reduced moire
US5299020A (en) * 1991-03-08 1994-03-29 Scitex Corporation Ltd. Method and apparatus for generating a screened reproduction of an image using stored dot portions
IL98004A (en) * 1991-04-30 1997-02-18 Scitex Corp Ltd Apparatus and method for descreening
US5867142A (en) * 1991-11-25 1999-02-02 Xerox Corporation System and method for processing an image having edges
US5341224A (en) * 1992-04-17 1994-08-23 Xerox Corporation Image processing system and method for employing adaptive scanning of halftones to provide better printable images
JPH09149241A (ja) * 1995-11-24 1997-06-06 Kokusai Electric Co Ltd 画像拡大方法及び画像拡大装置
JPH09266499A (ja) * 1996-01-26 1997-10-07 Oki Electric Ind Co Ltd デジタル復調回路、最大値検出回路及び受信装置
US6049393A (en) * 1997-11-19 2000-04-11 Tektronix, Inc. Method for enhancing resolution in a printed image
DE19826986C2 (de) * 1998-06-18 2003-03-27 Heidelberger Druckmasch Ag Verfahren zur Kalibrierung von Bildaufzeichnungsgeräten
US8643595B2 (en) * 2004-10-25 2014-02-04 Sipix Imaging, Inc. Electrophoretic display driving approaches
KR101287452B1 (ko) * 2006-09-01 2013-07-19 삼성전자주식회사 전자사진방식 화상형성장치 및 그의 하프토닝 보정 방법
US8243013B1 (en) 2007-05-03 2012-08-14 Sipix Imaging, Inc. Driving bistable displays
US20080303780A1 (en) 2007-06-07 2008-12-11 Sipix Imaging, Inc. Driving methods and circuit for bi-stable displays
US9019318B2 (en) * 2008-10-24 2015-04-28 E Ink California, Llc Driving methods for electrophoretic displays employing grey level waveforms
US20100194789A1 (en) * 2009-01-30 2010-08-05 Craig Lin Partial image update for electrophoretic displays
US9251736B2 (en) 2009-01-30 2016-02-02 E Ink California, Llc Multiple voltage level driving for electrophoretic displays
US9460666B2 (en) * 2009-05-11 2016-10-04 E Ink California, Llc Driving methods and waveforms for electrophoretic displays
US8576164B2 (en) * 2009-10-26 2013-11-05 Sipix Imaging, Inc. Spatially combined waveforms for electrophoretic displays
US11049463B2 (en) * 2010-01-15 2021-06-29 E Ink California, Llc Driving methods with variable frame time
US9224338B2 (en) * 2010-03-08 2015-12-29 E Ink California, Llc Driving methods for electrophoretic displays
US9013394B2 (en) 2010-06-04 2015-04-21 E Ink California, Llc Driving method for electrophoretic displays
TWI598672B (zh) 2010-11-11 2017-09-11 希畢克斯幻像有限公司 電泳顯示器的驅動方法
TWI550332B (zh) 2013-10-07 2016-09-21 電子墨水加利福尼亞有限責任公司 用於彩色顯示裝置的驅動方法
US10380931B2 (en) 2013-10-07 2019-08-13 E Ink California, Llc Driving methods for color display device
US10726760B2 (en) 2013-10-07 2020-07-28 E Ink California, Llc Driving methods to produce a mixed color state for an electrophoretic display

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1268657B (de) * 1965-07-14 1968-05-22 Hell Rudolf Dr Ing Fa Verfahren zur Steigerung der Schaerfe bei der Aufzeichnung der Reproduktionen lichtelektrisch abgetasteter Bildvorlagen
US3983319A (en) * 1973-11-12 1976-09-28 Printing Developments, Inc. Electronic screening for image reproduction
US3958509A (en) * 1974-06-13 1976-05-25 Harris Corporation Image scan and ink control system
US4032977A (en) * 1976-06-03 1977-06-28 Xerox Corporation Gray scale interpolation technique
US4084196A (en) * 1977-01-31 1978-04-11 Dacom, Inc. Electronic half-tone generating means for facsimile reproduction system
US4184206A (en) * 1978-03-07 1980-01-15 Hughes Aircraft Company Subpixel X-Y coordinate encoding
US4196452A (en) * 1978-12-01 1980-04-01 Xerox Corporation Tone error control for image contour removal

Also Published As

Publication number Publication date
JPS5633648A (en) 1981-04-04
EP0024902A3 (en) 1981-12-02
DE3069867D1 (en) 1985-02-07
EP0024902B1 (en) 1984-12-27
EP0024902A2 (en) 1981-03-11
US4259694A (en) 1981-03-31

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