JP2007282194A5 - - Google Patents

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JP2007282194A5
JP2007282194A5 JP2007039555A JP2007039555A JP2007282194A5 JP 2007282194 A5 JP2007282194 A5 JP 2007282194A5 JP 2007039555 A JP2007039555 A JP 2007039555A JP 2007039555 A JP2007039555 A JP 2007039555A JP 2007282194 A5 JP2007282194 A5 JP 2007282194A5
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color material
color
dimensional table
material amount
amount
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JP2007039555A
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JP4777275B2 (en
JP2007282194A (en
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Priority to JP2007039555A priority Critical patent/JP4777275B2/en
Priority claimed from JP2007039555A external-priority patent/JP4777275B2/en
Priority to PCT/JP2007/054823 priority patent/WO2007105683A1/en
Priority to US12/282,661 priority patent/US8184348B2/en
Priority to EP07738295A priority patent/EP1998551A1/en
Publication of JP2007282194A publication Critical patent/JP2007282194A/en
Publication of JP2007282194A5 publication Critical patent/JP2007282194A5/ja
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Claims (12)

入力色信号を、記録装置で用いる濃色材の色材値信号、および前記濃色材と同一色相であり濃度が低い、前記記録装置で用いる淡色材の色材値信号を含む色材値信号に変換するための色処理方法において、
前記濃色材と前記淡色材との合計色材量を、色材量制限値と前記記録装置で用いる色材の色材量との関係から求める第１工程と、
前記濃色材の色材量と前記淡色材の色材量との合計で表現される色の濃度を求める第２工程と、
前記合計色材量と前記濃度とに基づき、前記濃色材および前記淡色材それぞれの色材値信号を求める第３工程と、
を有することを特徴とする色処理方法。 The input color signal includes a color material value signal of a dark color material used in the recording apparatus, and a color material value signal including a color material value signal of the light color material used in the recording apparatus that has the same hue and low density as the dark color material. In the color processing method for converting to
A first step of obtaining a total color material amount of the dark color material and the light color material from a relationship between a color material amount limit value and a color material amount of a color material used in the recording apparatus;
A second step of obtaining a density of a color expressed by a sum of the color material amount of the dark color material and the color material amount of the light color material;
A third step of obtaining a color material value signal of each of the dark color material and the light color material based on the total color material amount and the density;
A color processing method comprising: 前記第１工程は、前記入力信号が示す色の濃度が所定値より低い場合は前記淡色材のみの色材量とし、前記入力信号が示す色の濃度が前記所定値以上場合は前記淡色材の色材量に前記濃色材の色材量を加えた色材量とする、前記合計色材料を求めることを特徴とする請求項１に記載の色処理方法。   In the first step, when the color density indicated by the input signal is lower than a predetermined value, the color material amount is only the light color material, and when the color density indicated by the input signal is equal to or higher than the predetermined value, The color processing method according to claim 1, wherein the total color material is obtained as a color material amount obtained by adding a color material amount of the dark color material to a color material amount. 前記第１工程は、
前記色材量制限値と、前記入力信号に対応する色材の色材量の合計との差を求める工程と、
前記入力信号に対応する複数の色材の色材量から、それぞれの色材について前記合計色材量が増加可能な色材量を求める工程と、
前記複数の色材におけるそれぞれの前記増加可能な色材量の割合に基づいて、前記差を前記濃色材と前記淡色材の合計色材量に加える工程と、
を有することを特徴とする請求項１または請求項２に記載の色処理方法。 The first step includes
Obtaining a difference between the color material amount limit value and the total color material amount of the color material corresponding to the input signal;
Obtaining a color material amount capable of increasing the total color material amount for each color material from the color material amounts of a plurality of color materials corresponding to the input signal;
Adding the difference to a total color material amount of the dark color material and the light color material based on a ratio of the increaseable color material amount of each of the plurality of color materials;
The color processing method according to claim 1, further comprising: さらに、記録装置で用いる色材の１次色、２次色、３次色について、入力色信号に対する色材の色材量を規定した１次元テーブルを生成する工程と、
前記１次元テーブルから、前記入力色信号によって規定される格子点に対応する色材量を計算し、３次元テーブルを生成する工程とを有し、
前記第１工程は、前記３次元テーブルに基づいて前記関係を求め、
前記第２工程は、前記３次元テーブルに基づいて、前記濃色材の色材量と前記淡色材の色材量との合計で表現される濃度を求めることを特徴とする請求項１から請求項３のいずれか一項に記載の色処理方法。 A step of generating a one-dimensional table that defines the color material amount of the color material with respect to the input color signal for the primary color, secondary color, and tertiary color of the color material used in the recording apparatus;
Calculating a color material amount corresponding to a grid point defined by the input color signal from the one-dimensional table, and generating a three-dimensional table,
The first step determines the relationship based on the three-dimensional table,
2. The method according to claim 1, wherein the second step obtains a density expressed by a sum of a color material amount of the dark color material and a color material amount of the light color material based on the three-dimensional table. Item 4. The color processing method according to any one of Items 3 to 3. 前記１次元テーブルおよび前記３次元テーブルは、ユーザ指示に基づきそれぞれの色材の色材量が調整可能であることを特徴とする請求項４に記載の色処理方法。   The color processing method according to claim 4, wherein the one-dimensional table and the three-dimensional table can adjust the color material amount of each color material based on a user instruction. 前記色材値信号は、パッチを測色して得られた測色値に基づいて作成されたマップに基づき、前記濃度と前記合計色材量とから求められることを特徴とする請求項１から請求項５のいずれか一項に記載の色処理方法。   2. The color material value signal is obtained from the density and the total color material amount based on a map created based on a colorimetric value obtained by measuring a patch. The color processing method according to claim 5. 前記３次元テーブルを生成する工程は、
ＣＭＹ空間における立方体の頂点を結ぶ所定のライン上の格子点、および、その内部の格子点に基づき、前記CMY空間において前記入力色信号が属する四面体を判定する工程と、
前記判定された四面体を規定する前記１次元テーブルに基づき、前記入力色信号に対応する色材量を算出する工程と、
を有することを特徴とする請求項５から請求項６のいずれか一項に記載の色処理方法。 The step of generating the three-dimensional table includes
Determining a tetrahedron to which the input color signal belongs in the CMY space based on a grid point on a predetermined line connecting the vertices of a cube in the CMY space, and a grid point inside the grid point;
Calculating a color material amount corresponding to the input color signal based on the one-dimensional table defining the determined tetrahedron;
The color processing method according to claim 5, further comprising: 前記３次元テーブルを生成する工程は、
少なくとも前記１次色の１次元テーブルを入力し、前記３次色の１次元テーブルを入力しない場合は、前記１次色の１次元テーブルを代替とする工程を有することを特徴とする請求項５から請求項７のいずれか一項に記載の色処理方法。 The step of generating the three-dimensional table includes
6. The method according to claim 5, further comprising a step of substituting the one-dimensional table of the primary color when at least the one-dimensional table of the primary color is input and the one-dimensional table of the tertiary color is not input. The color processing method according to claim 7. 前記３次元テーブルを生成する工程は、
少なくとも前記１次色の１次元テーブルを入力し、前記２次色の１次元テーブルを入力しない場合は、前記１次色の１次元テーブルを代替とする工程を有することを特徴とする請求項５から請求項８のいずれか一項に記載の色処理方法。 The step of generating the three-dimensional table includes
6. The method according to claim 5, further comprising a step of substituting the one-dimensional table of the primary color when at least the one-dimensional table of the primary color is input and the one-dimensional table of the secondary color is not input. The color processing method according to claim 8. 前記濃色材は、シアン、マゼンタの色材であり、前記淡色材は、それぞれシアン、マゼンタと同一の色相を有し、シアン、マゼンタより濃度の薄い、淡シアン、淡マゼンタの色材であることを特徴とする請求項１から請求項９のいずれか一項に記載の色処理方法。   The dark color material is a cyan and magenta color material, and the light color material is a light cyan and light magenta color material having the same hue as cyan and magenta, respectively, and having a lighter density than cyan and magenta. The color processing method according to any one of claims 1 to 9, wherein the color processing method is performed. 入力色信号を、記録装置で用いる濃色材の色材値信号、および前記濃色材と同一色相であり濃度が低い、前記記録装置で用いる淡色材の色材値信号を含む色材値信号に変換するための色処理装置において、
前記濃色材と前記淡色材との合計色材量を、色材量制限値と前記記録装置で用いる色材の色材量との関係から求める第１手段と、
前記濃色材の色材量と前記淡色材の色材量との合計で表現される色の濃度を求める第２手段と、
前記合計色材量と前記濃度とに基づき、前記濃色材および前記淡色材それぞれの色材値信号を求める第３手段と、
を有することを特徴とする色処理装置。 The input color signal includes a color material value signal of a dark color material used in the recording apparatus, and a color material value signal including a color material value signal of the light color material used in the recording apparatus that has the same hue and low density as the dark color material. In the color processing device for converting to
A first means for obtaining a total color material amount of the dark color material and the light color material from a relationship between a color material amount limit value and a color material amount of a color material used in the recording apparatus;
A second means for obtaining a density of a color expressed by a sum of a color material amount of the dark color material and a color material amount of the light color material;
Third means for obtaining a color material value signal of each of the dark color material and the light color material based on the total color material amount and the density;
A color processing apparatus comprising: コンピュータ装置を制御して、請求項１乃至請求項６のいずれか一項に記載された色処理方法の各工程として機能させることを特徴とするプログラム。   A program that controls a computer device to function as each step of the color processing method according to any one of claims 1 to 6.
JP2007039555A 2006-03-14 2007-02-20 Color processing method and color processing apparatus Expired - Fee Related JP4777275B2 (en)

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Application Number Priority Date Filing Date Title
JP2007039555A JP4777275B2 (en) 2006-03-14 2007-02-20 Color processing method and color processing apparatus
PCT/JP2007/054823 WO2007105683A1 (en) 2006-03-14 2007-03-12 Color resolution method and video image processing device
US12/282,661 US8184348B2 (en) 2006-03-14 2007-03-12 Color separation method and image processing apparatus
EP07738295A EP1998551A1 (en) 2006-03-14 2007-03-12 Color resolution method and video image processing device

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JP2006069604 2006-03-14
JP2006069604 2006-03-14
JP2007039555A JP4777275B2 (en) 2006-03-14 2007-02-20 Color processing method and color processing apparatus

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JP2007282194A5 true JP2007282194A5 (en) 2010-04-08
JP4777275B2 JP4777275B2 (en) 2011-09-21

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JP5049768B2 (en) * 2007-12-21 2012-10-17 キヤノン株式会社 Color separation table creation method and image forming apparatus
US8040568B2 (en) * 2008-06-09 2011-10-18 Xerox Corporation 4+ color management using a virtual CMYK color paradigm
JP5429456B2 (en) 2009-04-24 2014-02-26 富士ゼロックス株式会社 Color conversion apparatus and color conversion program
JP5863407B2 (en) * 2010-12-08 2016-02-16 キヤノン株式会社 Image processing apparatus, image processing method, and program

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JP2002152529A (en) * 2000-11-07 2002-05-24 Canon Inc Image processing method, device thereof and recording medium
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