ES444425A1 - Aparato para generar disenos de puntos de seudo-medios to- nos. - Google Patents

Aparato para generar disenos de puntos de seudo-medios to- nos.

Info

Publication number
ES444425A1
ES444425A1 ES444425A ES444425A ES444425A1 ES 444425 A1 ES444425 A1 ES 444425A1 ES 444425 A ES444425 A ES 444425A ES 444425 A ES444425 A ES 444425A ES 444425 A1 ES444425 A1 ES 444425A1
Authority
ES
Spain
Prior art keywords
computation
count
gray scale
input
level
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
ES444425A
Other languages
English (en)
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 ES444425A1 publication Critical patent/ES444425A1/es
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color, Gradation (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Image Processing (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Handling Of Sheets (AREA)
ES444425A 1975-01-20 1976-01-19 Aparato para generar disenos de puntos de seudo-medios to- nos. Expired ES444425A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/542,530 US4032978A (en) 1975-01-20 1975-01-20 Pseudo halftone print generator and method

Publications (1)

Publication Number Publication Date
ES444425A1 true ES444425A1 (es) 1977-05-16

Family

ID=24164225

Family Applications (2)

Application Number Title Priority Date Filing Date
ES444424A Expired ES444424A1 (es) 1975-01-20 1976-01-19 Un metodo para generar disenos de puntos de seudo-medias to-nos.
ES444425A Expired ES444425A1 (es) 1975-01-20 1976-01-19 Aparato para generar disenos de puntos de seudo-medios to- nos.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
ES444424A Expired ES444424A1 (es) 1975-01-20 1976-01-19 Un metodo para generar disenos de puntos de seudo-medias to-nos.

Country Status (13)

Country Link
US (1) US4032978A (es)
JP (1) JPS5524634B2 (es)
BE (1) BE836819A (es)
BR (1) BR7600355A (es)
CA (1) CA1047935A (es)
CH (1) CH591335A5 (es)
DE (1) DE2556565C3 (es)
ES (2) ES444424A1 (es)
FR (1) FR2298242A1 (es)
GB (1) GB1528377A (es)
IT (1) IT1058322B (es)
NL (1) NL187143C (es)
SE (1) SE412152B (es)

Families Citing this family (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4084196A (en) * 1977-01-31 1978-04-11 Dacom, Inc. Electronic half-tone generating means for facsimile reproduction system
US4122496A (en) * 1977-02-23 1978-10-24 International Business Machines Corporation Apparatus and method for digital halftone reproduction
FR2386213A1 (fr) * 1977-03-31 1978-10-27 Ibm Procede de reproduction a resolution fine a partir d'un balayage a resolution grossiere
US4150400A (en) * 1977-03-31 1979-04-17 International Business Machines Corporation Methods of a coarse-scan/fine-print character reproduction with compression
JPS5821979B2 (ja) * 1977-05-02 1983-05-06 日本電信電話株式会社 画像信号の網点処理方式
US4149194A (en) * 1977-07-07 1979-04-10 Xerox Corporation Variable angle electronic halftone screening
US4185304A (en) * 1977-07-07 1980-01-22 Xerox Corporation Electronic halftone screening
US4279002A (en) * 1978-04-24 1981-07-14 Xerox Corporation Adapter for raster output scanning printer
JPS5536896A (en) * 1978-07-14 1980-03-14 Information Int Inc Preparing halfftone duplicate and system thereof
US4189754A (en) * 1978-11-24 1980-02-19 The Mead Corporation Gray tone reproduction apparatus
US4468706A (en) * 1979-02-13 1984-08-28 Coulter Systems Corporation Imaging by varying the placement of elements in the pixels
JPS55146582A (en) * 1979-04-27 1980-11-14 Matsushita Electric Ind Co Ltd Image recording method
JPS55164868A (en) * 1979-06-08 1980-12-22 Mitsubishi Electric Corp Image recorder into plastic cards
JPS5616284A (en) * 1979-07-18 1981-02-17 Sanyo Electric Co Ltd Ink jet printer
JPS5619777A (en) * 1979-07-25 1981-02-24 Yokogawa Hokushin Electric Corp Gradation recording device
DE2931098C2 (de) * 1979-07-31 1983-01-05 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur Druckformherstellung
JPS5576390A (en) * 1979-09-03 1980-06-09 Ricoh Kk Dither image processing method
JPS5646364A (en) * 1979-09-10 1981-04-27 Xerox Corp Digital convertion in white and black image
DE2943018C3 (de) * 1979-10-24 1982-05-13 Siemens AG, 1000 Berlin und 8000 München Verfahren und Anordnung zum Darstellen eines Halbtonbilds
US4246614A (en) * 1979-12-26 1981-01-20 Xerox Corporation Binary graphic printer system having an electronic screen with shift control suited for rescreening
DE3049369A1 (de) * 1979-12-29 1981-09-17 Canon K.K., Tokyo Bildreproduktionsgeraet
JPS56155986A (en) * 1980-05-07 1981-12-02 Kogyo Gijutsuin Method of generating dot pattern
JPS5725771A (en) * 1980-07-23 1982-02-10 Canon Inc Picture signal processor
US4328425A (en) * 1980-08-04 1982-05-04 Xerox Corporation Filter for image pixels
US4328426A (en) * 1980-08-04 1982-05-04 Xerox Corporation Filter for image pixels
US4415920A (en) * 1980-09-19 1983-11-15 Canon Kabushiki Kaisha Image signal processing unit
JPS5762664A (en) * 1980-10-03 1982-04-15 Ricoh Co Ltd Binary processing method for analog picture signal
DE3037774C2 (de) * 1980-10-06 1982-06-16 Siemens AG, 1000 Berlin und 8000 München Verfahren und Anordnung zum Darstellen von mehrfarbigen Halbtonbildern
US4449150A (en) * 1981-01-19 1984-05-15 Ricoh Company, Ltd. Method of processing medium tone picture
JPS57159172A (en) * 1981-03-24 1982-10-01 Konishiroku Photo Ind Co Ltd Image processor
JPS57193173A (en) * 1981-05-22 1982-11-27 Fuji Photo Film Co Ltd Picture scanning and recording method
GB2103449B (en) * 1981-06-29 1985-05-30 Nippon Telegraph & Telephone Method and apparatus for gray level signal processing
US4706077A (en) * 1981-09-08 1987-11-10 Xerox Corporation Halftoning implementation for interactive image editing
DE3171227D1 (en) * 1981-09-12 1985-08-08 Hell Rudolf Dr Ing Gmbh Method for the production of printing plates by means of printing irregularly distributed points
JPS58150370A (ja) * 1982-03-02 1983-09-07 Sony Corp プリンタにおける階調信号発生回路
US5666444A (en) * 1982-04-06 1997-09-09 Canon Kabushiki Kaisha Image processing apparatus
DE3312273C3 (de) * 1982-04-06 1996-03-21 Canon Kk Bildverarbeitungsgerät
JPS5921173A (ja) * 1982-07-27 1984-02-03 Mitsubishi Electric Corp カラ−熱転写記録方式
JPS59101368A (ja) * 1982-12-01 1984-06-11 Canon Inc プリンタ付計算機
US4672432A (en) * 1983-04-28 1987-06-09 Canon Kabushiki Kaisha Method for recording a color image using dots of colorants of different densities
KR870001840B1 (ko) * 1983-06-08 1987-10-15 미쓰비시덴기 가부시기가이샤 텔레비젼 수신기의 프린터장치
DD218042A1 (de) * 1983-10-20 1985-01-30 Robotron Bueromasch Verfahren zum erzeugen von halbtonbildern mittels tintenstrahl
US4680596A (en) * 1984-08-02 1987-07-14 Metromedia Company Method and apparatus for controlling ink-jet color printing heads
JP2539783B2 (ja) * 1984-08-02 1996-10-02 メトロメディア・カンパニ− インクジエツト印刷ヘツドの制御装置
US4736254A (en) * 1984-11-22 1988-04-05 Matsushita Electric Industrial Co., Ltd. Method and apparatus for generating pseudo-halftone dots by comparing gray scale values of an original with dither threshold values stored in cells of a matrix array divided into imaginary matrices of elemental areas each containing one cell
FR2587572B1 (fr) * 1985-03-20 1994-02-18 Canon Kk Appareil et procede de traitement d'images
US4849768A (en) * 1985-05-01 1989-07-18 Burlington Industries, Inc. Printing random patterns with fluid jets
US4797687A (en) * 1985-05-01 1989-01-10 Burlington Industries, Inc. Patterning effects with fluid jet applicator
US5175807A (en) * 1986-12-04 1992-12-29 Quantel Limited Video signal processing with added probabilistic dither
USH996H (en) 1987-01-20 1991-11-05 Recognition Equipment Incorporated High resolution page image display system
US4823189A (en) * 1987-05-08 1989-04-18 Tektronix, Inc. Method and apparatus for creating a dither pattern
US5107346A (en) * 1988-10-14 1992-04-21 Bowers Imaging Technologies, Inc. Process for providing digital halftone images with random error diffusion
JPH02162871A (ja) * 1988-12-15 1990-06-22 Dainippon Screen Mfg Co Ltd 網点形成方法
US5051841A (en) * 1989-10-16 1991-09-24 Bowers Imaging Technologies, Inc. Process for providing digital halftone images with random error diffusion
JPH0371219U (es) * 1989-11-02 1991-07-18
JPH03104641U (es) * 1990-01-30 1991-10-30
US5257115A (en) * 1990-10-10 1993-10-26 Fuji Xerox Co., Ltd. Image recording apparatus using pseudo tone generated images
US5341228A (en) * 1990-12-04 1994-08-23 Research Corporation Technologies Method and apparatus for halftone rendering of a gray scale image using a blue noise mask
US5384647A (en) * 1991-06-10 1995-01-24 Minolta Camera Kabushiki Kaisha Image processing apparatus comprising means for judging image area of pseudo half-tone image
US5233366A (en) * 1992-05-26 1993-08-03 Xerox Corporation Half-tone printing with thermal ink jet using random spot distribution in one dimension
EP0612181A1 (de) * 1993-02-19 1994-08-24 Linotype-Hell Ag Verfahren und Einrichtung zur Umwandlung von Halbtonwerten in Binärwerte
EP0620672B1 (de) * 1993-04-08 1999-09-15 Heidelberger Druckmaschinen Aktiengesellschaft Verfahren zur Optimierung von frequenzmodulierten Rastern unter Nutzung von Schwellwertgebirgen
US5969729A (en) * 1994-05-27 1999-10-19 Colorspan Corporation Ink jet printer with artifact-reducing drive circuit
JPH0890822A (ja) * 1994-09-28 1996-04-09 Sony Corp 印刷方法及び画像印刷装置
US6164847A (en) * 1997-01-28 2000-12-26 Agfa Corporation Imaging parameter detection
US5912683A (en) * 1997-08-25 1999-06-15 Lexmark International, Inc. Method of printing with an ink jet printer using an enhanced horizontal resolution
US5991513A (en) * 1997-09-30 1999-11-23 Levien; Raphael L Method and apparatus for suppressing moire patterns
US6633412B1 (en) 1999-03-26 2003-10-14 Seiko Epson Corporation Smoothness enhancement in laser printing through periodic modulation of halftone cell
DE19919624C2 (de) * 1999-04-29 2001-03-01 Oce Printing Systems Gmbh Verfahren, System und Computerprogramm zum Komprimieren und Übertragen von Bildrasterdaten
AU2003214584A1 (en) * 2002-04-26 2003-11-10 Koninklijke Philips Electronics N.V. Active matrix display device
US7433076B2 (en) * 2003-07-18 2008-10-07 Technologies Photogram Inc. Macro-pixel image rendering apparatus and associated methods
US7706635B2 (en) * 2005-10-20 2010-04-27 Marvell International Technology Ltd. Methods and systems for image scaling

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294896A (en) * 1963-07-24 1966-12-27 Bell Telephone Labor Inc Digital encoder for facsimile transmission
DE2228414C2 (de) * 1972-06-10 1982-05-13 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren und Anordnung zum Drucken von Halbtonbildern
GB1448112A (en) * 1973-02-13 1976-09-02 Int Publishing Corp Ltd Electronic screening

Also Published As

Publication number Publication date
DE2556565A1 (de) 1976-07-22
US4032978A (en) 1977-06-28
JPS5524634B2 (es) 1980-06-30
FR2298242B1 (es) 1978-05-19
CA1047935A (en) 1979-02-06
FR2298242A1 (fr) 1976-08-13
SE412152B (sv) 1980-02-18
GB1528377A (en) 1978-10-11
NL7600518A (nl) 1976-07-22
JPS5187921A (es) 1976-07-31
BR7600355A (pt) 1976-08-31
IT1058322B (it) 1982-04-10
ES444424A1 (es) 1977-05-16
SE7600470L (sv) 1976-07-21
BE836819A (fr) 1976-04-16
DE2556565B2 (de) 1977-04-21
NL187143C (nl) 1991-06-03
DE2556565C3 (de) 1980-10-23
CH591335A5 (es) 1977-09-15

Similar Documents

Publication Publication Date Title
ES444425A1 (es) Aparato para generar disenos de puntos de seudo-medios to- nos.
ES435285A1 (es) Perfeccionamientos en generadores de palabras seudoaleto- rias.
GB1053725A (es)
GB1510849A (en) Method of and apparatus for printing grey-tone images
FR2249538A5 (en) Printing machine hammer energy control - has adjustable time delay between hammers and impulse generator
JPS5230423A (en) Control device for copying machine
JPS543546A (en) Exposure device
ES426782A1 (es) Mejoras introducidas en un sistema copiadornduplicador.
JPS5451328A (en) Control circuit of output device
JPS5399949A (en) Latent image recording method for magnetic printer
JPS5353925A (en) Print paper feeder
JPS53143329A (en) Copying apparatus
JPS53102035A (en) Correcting device for dot discrepancy in ink jet printing
JPS5442934A (en) Print control circuit for line printer
JPS5389738A (en) Correction system for color ink jet printer
DE3173225D1 (en) Method of partially smoothing a retouch during the electronic reproduction of colour images
JPS5436736A (en) Record control device for heat-sensitive printer
JPS5649976A (en) Hour-striking device
JPS52110344A (en) Electric advance
JPS6083850A (ja) プリンタ装置
JPS53108439A (en) Copying system
JPS525527A (en) Producing method of color printing
ES424462A1 (es) Aparato contador de coplas para maquina reproductora.
JPS51137329A (en) Typewriter for japanese letters by an electronic control
JPS52142521A (en) Timing signal generator for copying machine