CA1022080A - Graphic reproduction with dot changes related to image density - Google Patents

Graphic reproduction with dot changes related to image density

Info

Publication number
CA1022080A
CA1022080A CA192,481A CA192481A CA1022080A CA 1022080 A CA1022080 A CA 1022080A CA 192481 A CA192481 A CA 192481A CA 1022080 A CA1022080 A CA 1022080A
Authority
CA
Canada
Prior art keywords
image density
changes related
graphic reproduction
dot changes
dot
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
CA192,481A
Other languages
French (fr)
Other versions
CA192481S (en
Inventor
Robert C. Everett
Paul A.B. Radcliffe
Janusz A. Veltze
Alfred H. Robinson
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 Publishing Corp Ltd
Original Assignee
International Publishing Corp 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 International Publishing Corp Ltd filed Critical International Publishing Corp Ltd
Priority to CA278,441A priority Critical patent/CA1025363A/en
Application granted granted Critical
Publication of CA1022080A publication Critical patent/CA1022080A/en
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
    • H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
    • H04N1/4058—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern with details for producing a halftone screen at an oblique angle
CA192,481A 1973-02-13 1974-02-12 Graphic reproduction with dot changes related to image density Expired CA1022080A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA278,441A CA1025363A (en) 1973-02-13 1977-05-16 Electronic screening

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB711673A GB1448112A (en) 1973-02-13 1973-02-13 Electronic screening

Publications (1)

Publication Number Publication Date
CA1022080A true CA1022080A (en) 1977-12-06

Family

ID=9826921

Family Applications (1)

Application Number Title Priority Date Filing Date
CA192,481A Expired CA1022080A (en) 1973-02-13 1974-02-12 Graphic reproduction with dot changes related to image density

Country Status (7)

Country Link
US (1) US3916096A (en)
JP (1) JPS5025112A (en)
CA (1) CA1022080A (en)
DE (1) DE2406824A1 (en)
FR (1) FR2217727B1 (en)
GB (1) GB1448112A (en)
IT (1) IT1005448B (en)

Families Citing this family (61)

* Cited by examiner, † Cited by third party
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JPS5135217A (en) * 1974-09-20 1976-03-25 Tokyo Shibaura Electric Co
US4032978A (en) * 1975-01-20 1977-06-28 International Business Machines Corporation Pseudo halftone print generator and method
GB1549714A (en) * 1975-05-12 1979-08-08 Ecrm Making halftone reproductions
US3977007A (en) * 1975-06-02 1976-08-24 Teletype Corporation Gray tone generation
JPS5813064B2 (en) * 1975-12-18 1983-03-11 三菱電機株式会社 sampling couch
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
JPS54126415A (en) * 1978-03-24 1979-10-01 Ricoh Co Ltd High-density picture element forecasting-restoring method
JPS5563173A (en) * 1978-11-06 1980-05-13 Ricoh Co Ltd Picture signal processing system
US4308326A (en) * 1979-03-28 1981-12-29 Wirth John L Halftone contact screen and photographic method of making the screen
US4245258A (en) * 1979-11-05 1981-01-13 Xerox Corporation Method and apparatus for reduction of false contours in electrically screened images
US4280144A (en) * 1979-12-03 1981-07-21 International Business Machines Corporation Coarse scan/fine print algorithm
JPS5734556A (en) * 1980-08-08 1982-02-24 Dainippon Screen Mfg Co Ltd Method and device for dot image scanning and recording
US4340912A (en) * 1980-09-15 1982-07-20 Am International, Inc. Random screen generator apparatus for producing halftone images
US4491875A (en) * 1980-10-30 1985-01-01 Canon Kabushiki Kaisha Apparatus and method for tonal image processing
JPS57193173A (en) * 1981-05-22 1982-11-27 Fuji Photo Film Co Ltd Picture scanning and recording method
US4661859A (en) * 1981-06-03 1987-04-28 Xerox Corporation Pulse width modulation greyscale system for halftone printer
US4453084A (en) * 1981-09-15 1984-06-05 Esab, North America, Inc. Optical pattern tracing system
DE3312273C3 (en) * 1982-04-06 1996-03-21 Canon Kk Image processing device
US5666444A (en) * 1982-04-06 1997-09-09 Canon Kabushiki Kaisha Image processing apparatus
US4558328A (en) * 1982-10-26 1985-12-10 Victor Company Of Japan, Ltd. High resolution thermal ink transfer printer
JPS59122080A (en) * 1982-12-27 1984-07-14 Leo Giken:Kk Generating method of dot picture
JPS59161981A (en) * 1983-03-06 1984-09-12 Canon Inc Picture processor
JPS59229537A (en) * 1983-06-13 1984-12-24 Canon Inc Liquid-crystal focal plate
JPS60157375A (en) * 1983-12-21 1985-08-17 Fuji Xerox Co Ltd Halftone expressing system
US4680596A (en) * 1984-08-02 1987-07-14 Metromedia Company Method and apparatus for controlling ink-jet color printing heads
DE3688715T3 (en) 1985-03-30 1999-05-06 Hitachi Ltd Scanning record type printing method and its realization device.
US4873537A (en) * 1985-06-08 1989-10-10 Canon Kabushiki Kaisha Image recording apparatus for producing a plurality of pulse width modulated signals on the basis of image data
DE3650597T2 (en) 1985-08-15 1997-06-12 Canon Kk Device for generating images from a digital video signal
US4800442A (en) * 1985-08-15 1989-01-24 Canon Kabushiki Kaisha Apparatus for generating an image from a digital video signal
EP0213891B1 (en) * 1985-08-20 1993-10-27 Canon Kabushiki Kaisha Image processing apparatus
US4897734A (en) * 1985-10-28 1990-01-30 Canon Kabushiki Kaisha Image processing apparatus
US4878126A (en) * 1986-02-19 1989-10-31 Canon Kabushiki Kaisha Imgae processing apparatus
GB8628238D0 (en) * 1986-11-26 1986-12-31 Crosfield Electronics Ltd Generating half-tone representations
US5065256A (en) * 1987-09-21 1991-11-12 Fuji Photo Film Co., Ltd. Method of and apparatus for processing image signal
JP3147231B2 (en) * 1987-12-01 2001-03-19 キヤノン株式会社 Image processing device
US4920501A (en) * 1988-10-19 1990-04-24 Eastman Kodak Company Digital halftoning with minimum visual modulation patterns
US4977458A (en) * 1988-11-16 1990-12-11 Eastman Kodak Company Apparatus for addressing a font to suppress Moire patterns occurring thereby and a method for use therein
US4918622A (en) * 1988-11-16 1990-04-17 Eastman Kodak Company Electronic graphic arts screener
US4916545A (en) * 1988-11-16 1990-04-10 Eastman Kodak Company Electronic graphic arts screener that suppresses Moire patterns using pseudo-random font selection
US5278672A (en) * 1989-01-20 1994-01-11 Fuji Photo Film Co., Ltd. Image signal processing apparatus
US6163382A (en) 1989-07-20 2000-12-19 Netz; Yoel Devices and methods for offset and similar printing systems
US5274473A (en) * 1989-08-04 1993-12-28 Intergraph Corporation Rapid variable angle digital screening
US5214517A (en) * 1990-02-07 1993-05-25 Eastman Kodak Company Digital halftoning with correlated minimum visual modulation patterns
US5109283A (en) * 1990-03-02 1992-04-28 Xerographic Laser Images Corporation Raster scanning engine driver which independently locates engine drive signal transistors within each cell area
US5122883A (en) * 1990-03-02 1992-06-16 Xerographic Laser Images Corporation Raster scanning engine driver which independently locates engine drive signal transitions within each pixel
US5079721A (en) * 1990-05-18 1992-01-07 Scitex Corporation Ltd. Apparatus for generating a screened reproduction of an image
US5150225A (en) * 1990-05-18 1992-09-22 Scitex Corporation Ltd. Apparatus for generating a screened reproduction of an image
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
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
US5473733A (en) * 1992-03-25 1995-12-05 Scitex Corporation Ltd. Technique for generating image reproduction
US5949965A (en) * 1997-06-23 1999-09-07 Hewlett-Packard Company Correlating cyan and magenta planes for error diffusion halftoning
US6057933A (en) * 1997-10-30 2000-05-02 Hewlett-Packard Company Table based fast error diffusion halftoning technique
US6213018B1 (en) 1999-05-14 2001-04-10 Pcc Artwork Systems Flexographic printing plate having improved solids rendition
US6731405B2 (en) 1999-05-14 2004-05-04 Artwork Systems Printing plates containing ink cells in both solid and halftone areas
US7580154B2 (en) * 1999-05-14 2009-08-25 Esko Ip Nv Printing plates containing ink cells in both solid and halftone areas
US7280246B2 (en) * 2003-02-12 2007-10-09 Marvell International Technology Ltd. Laser print apparatus that generates pulse width value and justification value based on pixels in a multi-bit image
US20040207890A1 (en) * 2003-04-16 2004-10-21 Breswick Curt Paul Method and apparatus for controlling shifting of data out of at least one image sensor
US8132508B2 (en) 2005-04-14 2012-03-13 Esko Software Bvba Method of controlling ink film thickness on a printing plate
US7226258B2 (en) * 2005-05-18 2007-06-05 Roloff M Mark Apparatus and method for transporting motorcycles on a trailer or pick-up truck and avoiding accidental or inadvertent damage thereto
US20070269123A1 (en) * 2006-05-16 2007-11-22 Randall Don Briggs Method and apparatus for performing image enhancement in an image processing pipeline

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL254939A (en) * 1959-08-17
FR1457309A (en) * 1965-05-13 1966-01-24 Colos Soc Electronic method and device for reproducing halftones on electrostencil
US3465199A (en) * 1968-11-26 1969-09-02 Rca Corp Electronic halftone image generator

Also Published As

Publication number Publication date
DE2406824A1 (en) 1974-08-22
JPS5025112A (en) 1975-03-17
IT1005448B (en) 1976-08-20
FR2217727B1 (en) 1980-04-25
US3916096A (en) 1975-10-28
FR2217727A1 (en) 1974-09-06
GB1448112A (en) 1976-09-02

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