• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to printing and improves image quality by eliminating the formation of a color contour. For reproduction of gray color, print with its minimum density only with black printing ink. In the low to medium density range, the amount of colored inks is increased by up to 25%, reducing the amount of black paint by the same amount, thus avoiding the appearance of the outline when going from pure gray tones to slightly colored tones with a completely non-speckled construction. 4 il. §
    公开号:SU1371510A3
    申请号:SU833596250
    申请日:1983-05-27
    公开日:1988-01-30
    发明作者:Веллендорф Клаус
    申请人:Др-Инж.Рудольф Хелль Гмбх (Фирма)；
    IPC主号:
    专利说明:

    cl
    L
    00

    SP


    SP
    The invention relates to printing, and more specifically to a four-color printing technique.
    The aim of the invention is to improve the quality of reproductions by eliminating} the formation of a color contour.
    Figure 1 shows the course of the color signals with decreasing colors depending on the density without a gray balance; FIG. 2 shows an enlarged portion of FIG. in FIG. 3, the course of the color signals with decreasing colors depending on ffOCTH on density with a gray balance; figure 4 is an enlarged section fig.Z
    Figure 1 shows the stroke of color inks for the case when working without a gray balance. The solid C-M-Y curve is slightly raised in a certain range from small to medium densities, and the black ink K is slightly reduced in the same range (in Fig. 2, this range is shown on an enlarged scale). Such a course of the curves makes it possible to avoid the appearance of an outline, i.e. color contour, when moving from pure gray tones to slightly colored tones with
    10050-
    f. j
    completely not motley construction. The increase in color inks ranges from O to 25% and depends on the nature of the original and the method of printing.
    Fig. 3 and A show the course of color (s, M, Y) and black (K) paint curves in the case of working with gray balance.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    The four-color printing method, in which for reproducing gray, starting from its minimum density, is printed with black printing ink only, and starting with a density value of gray, equal to the total density of the applied black printing ink, the proportion of variegated inks is increased, characterized in that to improve the quality of the image by eliminating the formation of a color contour, in the density range from the minimum to the average, the amount of colored inks is increased to 25%, and the amount of black paint is increased by one hundred ko is reduced.
    2
    shine.
    Average
    Fi.Z
    500
    FIG. h
    类似技术:
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    SU1371510A3|1988-01-30|Method of four-colour printing
    SU1271381A3|1986-11-15|Method of four-colour printing
    US4635078A|1987-01-06|Intermediate gradient image producing method
    JPS5846341A|1983-03-17|Converting method for reproduced color in displaying of reproduced color of multicolor printed matter
    EP0817464A3|2000-03-08|Printing system utilizing inks of different densities, cartridge used therefor, and method of recording images
    US4772911A|1988-09-20|Image formation apparatus
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    EP1289269A3|2005-01-05|Printing system, printing method, and control program for the printing system
    GB2191905A|1987-12-23|A method for color correction
    EP0211509A2|1987-02-25|Method for printing a colour image
    JPH0197652A|1989-04-17|Method of color printing
    CA2151093A1|1995-12-16|Method for Producing Gradient Tonal Representations and a Printhead for Producing the Same
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    US5209162A|1993-05-11|Additional color density method
    JP2713995B2|1998-02-16|Ink jet recording method and ink jet recording apparatus
    SE8903273D0|1989-10-05|SETTING UP TO IMPROVE PRINT PERFORMANCE OF GRAY SCALES AND PRINCIPAL PRINTERS
    JPS5986671A|1984-05-18|Ink for printing ribbon
    JP2990361B2|1999-12-13|Image processing method
    KR910001588A|1991-01-31|Inkjet Printer
    JPS6447553A|1989-02-22|Recording method of color tone
    JPH01253454A|1989-10-09|Ink jet printer
    JPS5764565A|1982-04-19|Digital color pinter
    KR910001589A|1991-01-31|The Thermal Printer
    JP2575949B2|1997-01-29|Color image forming equipment
    JPS60182864A|1985-09-18|Color picture reproducing device
    同族专利:
    公开号 | 公开日
    JPH0210407B2|1990-03-08|
    FI73093B|1987-04-30|
    FI831875L|1983-11-30|
    EP0095518A1|1983-12-07|
    FI831875A0|1983-05-25|
    AT14944T|1985-08-15|
    DK236283A|1983-11-30|
    FI73093C|1987-08-10|
    AU1413383A|1983-12-01|
    AU572454B2|1988-05-12|
    US4590515A|1986-05-20|
    CA1222160A|1987-05-26|
    ZA833862B|1984-02-29|
    DK236283D0|1983-05-26|
    DE3265413D1|1985-09-19|
    EP0095518B1|1985-08-14|
    JPS58211757A|1983-12-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    BE530710A|1953-07-30|
    US2981792A|1957-10-31|1961-04-25|Fairchild Camera Instr Co|Color correction computer for engraving machines|
    US3885244A|1970-12-17|1975-05-20|Hell Rudolf Dr Ing|Method of producing color correction signals and color separation signals|
    DE2621008B2|1976-05-12|1978-10-26|Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel|Process for obtaining and utilizing color correction data for color image recording|
    DE2848376C2|1978-11-08|1983-12-15|Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel|Device for post-correction of standard color corrections in color image recording|
    AU538242B2|1979-05-18|1984-08-02|Dr.-Ing Rudolf Hell G.M.B.H.|Switching process and device by partial electronic retouchingduring the reproduction of colour images|
    DE3020201A1|1979-05-30|1980-12-11|Crosfield Electronics Ltd|IMAGE REPRODUCTION DEVICE|
    DE3069638D1|1980-09-10|1984-12-20|Hell Rudolf Dr Ing Gmbh|Method and circuit for partial correction of the drawing during the colour image reproduction|
    DE3109190C2|1981-03-11|1985-07-11|Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel|Process for the reproduction of colored originals in four-color printing with color removal|
    JPS6338155B2|1981-09-16|1988-07-28|Dainippon Screen Mfg|GB2154094B|1983-12-30|1988-10-12|Dainippon Screen Mfg|A multi-colour printing process|
    US4701790A|1984-06-13|1987-10-20|Dainippon Screen Manufacturing Co., Ltd.|Method and apparatus for color separation in an image reproduction scanner|
    JP2677283B2|1984-06-14|1997-11-17|キヤノン株式会社|Color image processing equipment|
    JPH069371B2|1984-06-29|1994-02-02|キヤノン株式会社|Color image processing method|
    US4680625A|1984-07-18|1987-07-14|Konishiroku Photo Industry Co., Ltd.|Method and apparatus for multicolor image forming|
    US4805013A|1984-09-05|1989-02-14|Canon Kabushiki Kaisha|Image data conversion system|
    US4796086A|1984-11-30|1989-01-03|Fuji Photo Film Co., Ltd.|Method for converting color picture signals|
    JPH0783423B2|1985-06-28|1995-09-06|株式会社東芝|Multi-gradation color image recording method|
    JP2534678B2|1986-08-08|1996-09-18|キヤノン株式会社|Color image processing device|
    DE3750860T3|1986-08-13|1999-10-14|Canon Kk|Method and device for processing color images.|
    JP2624660B2|1987-01-06|1997-06-25|キヤノン株式会社|Color image processing method|
    US5172223A|1987-12-29|1992-12-15|Canon Kabushiki Kaisha|Method of processing a color image to obtain color and black reproduction signals|
    US4959790A|1988-06-28|1990-09-25|F & S Corporation Of Columbus, Georgia|Apparatus and method for producing color corrected reproduction of colored original images|
    JPH06101799B2|1988-10-28|1994-12-12|富士ゼロックス株式会社|Gray balance control method for image forming apparatus|
    US5121196A|1988-11-18|1992-06-09|Konica Corporation|Color processing method and apparatus with a color patch|
    CA2055058C|1990-12-31|1996-08-06|Anthony Joseph Dattilo|Automatic correction for color printing|
    US5841955A|1991-12-02|1998-11-24|Goss Graphic Systems, Inc.|Control system for a printing press|
    JP3273204B2|1993-02-15|2002-04-08|コニカ株式会社|Color separation image processing method and apparatus for four-color printer|
    EP0615379B1|1993-03-08|1999-05-19|Canon Kabushiki Kaisha|Colour conversion apparatus|
    JPH0787346A|1993-09-10|1995-03-31|Fuji Xerox Co Ltd|Method and device for processing color picture|
    US5729360A|1994-01-14|1998-03-17|Fuji Xerox Co., Ltd.|Color image processing method and system|
    US5767980A|1995-06-20|1998-06-16|Goss Graphic Systems, Inc.|Video based color sensing device for a printing press control system|
    US5805280A|1995-09-28|1998-09-08|Goss Graphic Systems, Inc.|Control system for a printing press|
    US6275302B1|1995-12-27|2001-08-14|Xerox Corporation|Color printing yielding a background dependent neutral gray image |
    US5978506A|1995-12-28|1999-11-02|Ricoh & Company, Ltd.|Colorant-independent color balancing methods and systems|
    US6867883B1|2000-01-21|2005-03-15|Lexmark International, Inc.|Method and apparatus for expanding a color gamut|
    US6833937B1|2000-01-21|2004-12-21|Lexmark International, Inc.|Methods and apparatus for color mapping|
    US7019868B2|2000-12-19|2006-03-28|Sharp Laboratories Of Ameirca, Inc.|Black generation method for CMYK color printer using multiple lookup tables and interpolation|
    JP3870143B2|2002-09-27|2007-01-17|キヤノン株式会社|Information processing method|
    JP4619749B2|2004-11-05|2011-01-26|富士フイルム株式会社|Color conversion definition creation device and color conversion definition creation program|
    US7847975B2|2007-07-02|2010-12-07|Xerox Corporation|Converting black to composite black in digital printing|
    JP4945361B2|2007-07-30|2012-06-06|富士フイルム株式会社|Image processing method and apparatus, and CPU-readable recording medium|
    US8294951B2|2010-02-19|2012-10-23|Kuo-Ping Yang|Method of reducing the amount of black in an image|
    US8326034B2|2010-08-05|2012-12-04|Kuo-Ping Yang|Method of reducing the amount of black in an image|
    US11258926B2|2018-04-27|2022-02-22|Hewlett-Packard Development Company, L.P.|Color resources|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    EP82104745A|EP0095518B1|1982-05-29|1982-05-29|Method for tone-value-dependent colour removal in four color printing|
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