JP2005027052A - Device and method for adjusting hue, program and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hue adjusting device and method for enabling a user to easily perform hue adjustment for each color of an image by graphing the hue adjustment, specifying the hue adjustment clearly, grasping the hue adjustment characteristics clearly, or the like and to provide a program and a recording medium. <P>SOLUTION: This hue adjusting device for adjusting the hues of an output image of a printer is provided with a means for displaying the hue characteristic on a graph on a hue ring, a means for designating the hue position from which desired characteristics can be obtained for displayed hue characteristics for each hue, and a means for changing the hue characteristics on the basis of the designated hue position. Changing the hue characteristics is performed by changing the parameter that indicates the hue and making a printer change the hue with reference to the parameter. A means for display is provided with a reset display for setting hue adjustment cancellation. A means for changing the hue characteristics is set in a printer driver installed in a computer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【００４２】
以下に本実施形態の実例として赤色の色相調整を考える。
【００４３】
プリンタドライバＵＩ上でユーザにより赤の色相をｘ度変更するよう指定されたとすると、元々の赤の色相Ｈ_Ｒ は当然であるが、さらには図７のＨ_Ｒ 近辺の（１）と（１２）の範囲の色が影響を受けることとなる。
【００４４】
この（１）と（１２）の範囲の色相は、準基準色ＲＭとＹＲの色相Ｈ_ＲＭ、Ｈ_ＹＲを使用して、以下の補間演算式により求める（ステップＳ２４参照）。
（１） Ｈ’＝Ｈ＋ｘ＊（Ｈ_ＲＭ−Ｈ）／（Ｈ_ＲＭ−Ｈ_Ｒ）
（１２）Ｈ’＝Ｈ＋ｘ＊（Ｈ−Ｈ_ＹＲ）／（Ｈ_Ｒ −Ｈ_ＹＲ）
なお、Ｈは調整前の色相でＨ’は調整後の色相を表す。
【００４５】
この補間演算式で色相調整を行うことで、図８に示すように調整を行っているＲ（赤色）近辺の色は調整値の影響を大きく受け、ＲＭやＹＲの色に近づくにつれて調整値の影響を受けなくなるという特性を持つこととなり、注目色以外の色相の連続性も保つことができる。
【００４６】
また、最も彩度の高い赤色だけでなく、同色相値を持つ低彩度から高彩度にかけての色も同様の割合で変化するので、彩度方向の連続性も損なわれることはない。
【００４７】
続いて、算出された色相Ｈ’を使用してＣ_ｂ Ｃ_ｒ 値（Ｃ_ｂ Ｃ_ｒ データ）を変更する（ステップＳ２５参照）。
色相調整前のデータをＣ_ｂ とＣ_ｒ とし、調整後のデータをＣ_ｂ ’とＣ_ｒ ’とすると、Ｃ_ｂ ’とＣ_ｒ ’は、調整前後の色相ＨとＨ’とを使用して、図９に示す変換マトリクステーブルを用いて算出する。
【００４８】
最後に、算出後のＣ_ｂ ’Ｃ_ｒ ’値と、変更していないＹ値から、図４に示す変換マトリクステーブルを用いてＲＧＢ画像データに変更する（ステップＳ２６参照）。
【００４９】
以上をまとめると、本実施の形態は、ＲＧＢ画像データ入力があった時に、ＲＧＢ画像データをＹＣ_ｂ Ｃ_ｒ 画像データに変換し、変換されたＹＣ_ｂ Ｃ_ｒ 画像データのＣ_ｂ Ｃ_ｒ データの色相特性をグラフとして表示し、表示された色相特性に対して所望の特性を得られる色相位置が指定された時、指定された色相位置に基づいて色相特性を変更し、変更された色相特性に基づいてＹＣ_ｂ Ｃ_ｒ 画像データのＣ_ｂ Ｃ_ｒ データを変更し、変更されたＣ_ｂ Ｃ_ｒ データに基づいてＹＣ_ｂ Ｃ_ｒ 画像データをＲＧＢ画像データに変換するという各手順となる。そして、このような手順をコンピュータに実行させるためのプログラムを作成し、コンピュータにインストールし、プリンタドライバによってプリントの色相を調整する。
【００５０】
こうして得られたＲＧＢ画像が、前述のように必要に応じてカラーマッチング処理が行われた後、プリンタに転送されてプリントが実行されることとなる。
【００５１】
図１０に、プリンタドライバ上でユーザが行う色相調整のＧＵＩの例を示す。
【００５２】
図において、色相調整のＧＵＩ１００は、色相特性グラフ５０と、数値ボックス６０と、リセットボタン７０等、を有して構成される。色相特性グラフ５０は、色相を表すバー５１と、マウスポインタ５２等、を有して構成される。
【００５３】
ＧＵＩ１００上には前述した色相環を表示しておき（図６、図７参照）、基本６色上に色相を表すバー５１を表示させることで色相特性グラフ５０を表す。
【００５４】
このバー５１は、マウスでのドラッグ操作を可能としておき、ユーザがこのバー５１をマウスのポインタ５２で操作することにより、注目色相の変更が可能となる。
また、色相の変更はキーボードによる数値入力も可能とする。
【００５５】
図のように、色相特性グラフ５０の横に数値入力用の数値ボックス６０を用意し、そこに注目色相の値を直接入力することでも変更が可能となる。
【００５６】
色相を表すバー５１と数値ボックス６０は相互にデータの反映を行い、バー５１が動かされると数値も変更され、数値が変更されるとバー５１も動くこととする。
【００５７】
色相の調整範囲は、隣り合う基本色を超えてしまうことによる連続性の破綻を防ぐために、±１５度までとし、それ以上の数値入力とバーの移動にはリミットをかけておく。
【００５８】
また、色相調整を無効とするためのリセットボタン７０を設ける。これにより、これまで操作した調整値はすべて０リセットすることができる。
【００５９】
【発明の効果】
請求項１から４記載の発明によれば、色相特性を色相環上にグラフとして表示する手段と、表示された色相特性に対して所望の特性を得られる色相位置を色相ごとに指定する手段と、指定された色相位置に基づいて前記色相特性を変更する手段を備えているので、従来画像全体に対してしかできなかった色相調整が色相ごとに行えるようになる。また、請求項１記載の発明によれば、従来色相ごとの調整が可能でもその方法には複雑な手順が必要であった色相調整が、容易に行えるようになる。
【００６０】
請求項２から４記載の発明によれば、色相特性を変更する手段は、色相を指示するパラメータを変更し、プリンタは前記パラメータを参照して色相を変更するので、簡単な構成で調整の多様性に対応できる色相調整を実行することができる。
【００６１】
請求項３、４記載の発明によれば、表示する手段に前記指定手段による色相調整の取り消しを設定するリセット表示を設けるので、色相変更前後でデフォルトとの比較が容易に行える。
【００６２】
請求項４記載の発明によれば、色相特性を変更する手段は、コンピュータにインストールされるプリンタドライバに設定されるので、プリンタドライバをコンピュータにインストールするだけで、前記各効果を容易に得ることができる。
【００６３】
請求項５、７、８記載の発明によれば、色相特性グラフを前記コンピュータの表示画面上に表示し、表示された色相特性に対して所望の特性を得られる色相位置を指定し、コンピュータのプリンタドライバは指定された色相位置に基づいて前記色相特性を設定し、その特性を参照して色相を調整するので、ユーザは自由かつ直感的に最適な色相調整を行うことができ、ユーザの満足度の高い出力結果を得ることができる。
【００６４】
請求項６から８記載の発明によれば、ＲＧＢ画像データ入力があった時に、ＹＣ_ｂ Ｃ_ｒ 画像データに変換する第１の手順と、変換されたＹＣ_ｂ Ｃ_ｒ 画像データの色相特性を表示する第２の手順と、表示された色相特性に対して所望の特性を得られる色相位置が指定された時、指定された色相位置に基づいて色相特性を変更する第３の手順と、変更された色相特性に基づいてＹＣ_ｂ Ｃ_ｒ 画像データのＣｂＣｒデータを変更する第４の手順と、変更されたＣ_ｂ Ｃ_ｒ データに基づいて、ＹＣ_ｂ Ｃ_ｒ 画像データをＲＧＢ画像データに変換する第５の手順が情報記録媒体にプログラムとして書き込まれているので、この情報記録媒体を使用してコンピュータにプリンタドライバをインストールすれば、ユーザは誰でも自由かつ直感的に最適な色相調整を行うことができ、ユーザの満足度の高い出力結果を得ることができる。
【図面の簡単な説明】
【図１】一般的なカラープリントの流れ図である。
【図２】本発明による色相調整装置、色相調整方法、プログラム、及び記録媒体の一実施形態における色相調整のフローチャートである。
【図３】本発明による色相調整装置、色相調整方法、プログラム、及び記録媒体の一実施形態におけるＲＧＢからＹＣ_ｂ Ｃ_ｒ への変換式である。
【図４】本発明による色相調整装置、色相調整方法、プログラム、及び記録媒体の一実施形態におけるＹＣ_ｂ Ｃ_ｒ からＲＧＢへの変換式である。
【図５】ＹＣ_ｂ Ｃ_ｒ 色空間である。
【図６】ＹＣ_ｂ Ｃ_ｒ データのＣ_ｂ とＣ_ｒ の関係をプロットすることで得られる色相環である。
【図７】基本６色間に準基本６色を定義した色相環である。
【図８】本発明による色相調整装置、色相調整方法、プログラム、及び記録媒体の一実施形態におけるＲ調整時のＲ近辺色の動きの説明図である。
【図９】本発明による色相調整装置、色相調整方法、プログラム、及び記録媒体の一実施形態におけるＣ_ｂ Ｃ_ｒ からＣ_ｂ ’Ｃ_ｒ ’への変換式である。
【図１０】本発明による色相調整装置、色相調整方法、プログラム、及び記録媒体の一実施形態におけるプリンタドライバＧＵＩの一例である。
【符号の説明】
１０ アプリケーション
２０ プリンタドライバ
３０ プリンタコントローラ
４０ プリンタエンジン
５０ 色相特性グラフ
５１ （色相を表す）バー
５２ マウスポインタ
６０ 数値ボックス
７０ リセットボタン
１００ 色相調整のＧＵＩ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hue adjustment device, a hue adjustment method, a program, and a recording medium, and more particularly, to a hue adjustment device, a hue adjustment method, a program, and a recording medium for an output image performed in a printer driver of a color printer.
[0002]
[Prior art]
Regarding the hue adjustment function of image adjustment in a conventional color printer, it is general that only a limited function such as hue adjustment for the entire image is provided (see Patent Document 1).
[0003]
On the other hand, it is discriminated by having hue adjustments for basic colors such as R (red), G (green), B (blue), C (cyan), M (magenta), and Y (yellow) rather than the entire image. There is also an image processing method and a printing system which are designed to be realized (see Patent Document 2).
[0004]
This method adjusts the hue of only the basic color, and outputs a gradation patch to measure the gradation of halftones that cannot be maintained by itself, and measures the gradation characteristics based on the result. By doing so, the gradation can be maintained.
[0005]
Certainly, the image processing method and the printing system are significant in that they have a hue adjustment function for the basic color as compared with the above-described general hue adjustment for the entire image.
[0006]
[Patent Document 1]
JP-A-8-251393 [Patent Document 2]
Japanese Patent Laid-Open No. 2000-190572
[Problems to be solved by the invention]
However, the method of realizing it is a method that is not as simple as the above-mentioned “adjustment of basic color + correction of gradation characteristics using a colorimeter”. That is, in order to perform colorimetry using a colorimeter and adjustment using the data, the user needs to have a wealth of knowledge about colors. It is considered difficult to obtain the adjustment result.
[0008]
Therefore, the present invention has been made in view of the actual situation of such a conventional technique, and an object of the present invention is to provide a hue adjustment apparatus and a hue adjustment method that allow a user to easily adjust the hue for each color of an image. is there.
[0009]
Another object of the present invention is to provide a hue adjustment apparatus and a hue adjustment method that allow a user to clearly grasp the characteristics by displaying the hue adjustment as a graph.
[0010]
Another object of the present invention is to provide a program for realizing the above method and a computer-readable recording medium on which the program is recorded.
[0011]
[Means for Solving the Problems]
To achieve the above object, according to the first aspect of the present invention, the hue adjusting device is a hue adjusting device that adjusts the hue of an output image of a printer that prints an image according to image data transferred from a computer. The display means for displaying the hue characteristics as a graph on the hue ring, the designation means for designating the hue position for each hue to obtain a desired characteristic for the hue characteristics displayed by the display means, and the designation means And a hue characteristic changing means for changing the hue characteristic based on the hue position.
[0012]
According to the second aspect of the present invention, the hue adjusting device performs the hue characteristic change by changing the parameter indicating the hue by the hue characteristic changing unit and the printer changing the hue with reference to the parameter. The hue adjusting device according to claim 1, wherein
[0013]
According to a third aspect of the present invention, the display means further comprises a reset display means for setting cancellation of the hue adjustment by the designation means, the hue adjustment apparatus according to the first or second aspect. Is.
[0014]
According to a fourth aspect of the present invention, in the hue adjusting apparatus, the hue characteristic changing means is set in the printer driver installed in the computer. It is characterized by being.
[0015]
According to the invention described in claim 5, the hue adjustment method is a hue adjustment method for adjusting the hue of an output image of a printer that prints an image in accordance with image data transferred from a computer, the hue characteristic representing a hue characteristic. On the display screen of the computer as a graph, a procedure for specifying a hue position for obtaining a desired characteristic with respect to the hue characteristic displayed on the display screen, and a printer driver based on the specified hue position And changing the hue characteristic and adjusting the hue with reference to the hue characteristic.
[0016]
According to the invention described in claim 7, the program causes the computer to execute the procedure described in claim 5 or 6.
[0017]
According to the sixth aspect of the present invention, the program is a program that is installed in a computer and adjusts the hue of printing by a printer driver. When RGB image data is input, the RGB image data is converted into YC _b C. a step of converting the _r image data, a procedure for displaying the hue characteristics of the C _b C _r data of the converted YC _b C _r image data as a graph, the hue obtained the desired characteristics for the displayed hue characteristics When the position is designated, the procedure for changing the hue characteristic based on the designated hue position, the procedure for changing the C _b C _r data of the YC _b C _r image data based on the changed hue characteristic, and the change a step of converting the _YC b _{C r} image data into RGB image data on the basis of the _C b _{C r} data, that causes a computer to execute the It is an butterfly.
[0018]
According to an eighth aspect of the invention, the recording medium is a computer-readable recording medium in which the program according to the seventh aspect is recorded.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of a hue adjusting device, a hue adjusting method, a program, and a recording medium according to the present invention will be described in detail with reference to the accompanying drawings.
[0020]
This embodiment relates to a hue adjustment function among color adjustment functions for an output image performed in a printer driver of a color printer.
[0021]
First, FIG. 1 shows a general color print flow in a color printer.
[0022]
First, when printing is performed on an image from the application 10, RGB data of the image is passed from the application 10 to the printer driver 20 (step S1).
[0023]
The printer driver 20 performs adjustment functions specified by the user on the driver UI (User Interface) such as brightness / saturation adjustment and hue adjustment for the RGB data (step S2), and further performs color matching processing as necessary. Is performed (step S3).
[0024]
The RGB data subjected to the adjustment and color matching processing is transferred from the printer driver 20 to a color printer connected by wire or wirelessly.
[0025]
The printer controller 30 incorporated in the color printer receives the transferred RGB data, and is a printing color space by a known technology such as BG / UCR (Black Generation / Under Color Removal) or GCR (Gray Component Replacement). Conversion into CMYK data is performed (step S4).
[0026]
The CMYK data is subjected to a γ conversion process for adjusting the color balance (step S5), and then a dither method, which is a known technique, is used to express gradations with the printer engine 40 that cannot express gradations with multiple values. Or gradation conversion using the error diffusion method is performed (step S6).
[0027]
Thereafter, the CMYK data subjected to tone conversion is sent to the printer engine 40, and printing is performed by an electrophotographic method or an ink jet method (step S7).
[0028]
The hue adjustment in the present embodiment is also performed on the RGB data passed from the application 10 to the printer driver 20 in accordance with the above general flow of color printing, and the printer driver 20 is installed for the processing. It will be done on a computer.
[0029]
In the embodiment of hue adjustment, six basic colors, R (red), G (green), B (blue), C (cyan), M (magenta), Y (set by the user on the printer driver 20 are described. (Yellow) will be adjusted.
[0030]
FIG. 2 shows a flowchart of hue adjustment in one embodiment of the hue adjustment apparatus, hue adjustment method, program, and recording medium according to the present invention.
[0031]
In step S21, conversion from RGB image data to YC _{b Cr} image data is performed. In step S22, the hue H is calculated. In step S23, the user performs hue adjustment designation. In step S24, the hue H ′ of the designated color is calculated. In step S25, a hue rotation process is performed. In step S26, conversion from YC _{b Cr} image data to RGB image data is performed.
[0032]
Each of the above steps will be described in more detail below.
[0033]
First, input RGB image data passed from the application 10 to the printer driver 20 is converted into YC _b C _r image data using the conversion matrix table shown in FIG. 3 (Y: brightness, C _b , C _r : saturation). (See step S21).
[0034]
By converting from RGB to YC _b C _r, it is possible to capture the color space lightness as shown in FIG. 5, chroma, as the three parameters: hue.
The lightness is a measure of the degree of color brightness. Saturation is a measure of the vividness of color and the degree of color. As described later, the hue refers to a scaled difference in hue and hue such as red, green, blue, cyan, magenta, and yellow.
[0035]
In the hue circle shown in FIG. 6 obtained by plotting the relationship between C _b and C _{r in} the YC _b C _r data, the colors are distributed in a circular shape with the center of the hue circle being an achromatic color as the origin. The more saturated the color, the farther away from the center.
[0036]
Each color is necessarily distributed at a certain angle of the 360 degree hue circle, and the angle of the line connecting the center of the hue circle and the highest saturation point of each color is called the hue. FIG. 6 also shows images of the basic six colors RGB, C, M, and Y.
[0037]
Subsequently, the hue H is calculated from the C _b value and the C _r value (C _b C _r data) of the converted image data using the following conversion formula, and the image data is classified for each hue. (See step S22).
H = tan ⁻¹ (C _b / C _r )
[0038]
Subsequently, the hue is adjusted for each of the six basic colors as described above (see step S23), but the problem here is continuity with respect to colors other than the basic six colors.
[0039]
In order to maintain this continuity, it is necessary to make some adjustments. In this embodiment, as this adjustment method, first, as shown in FIG. 7, there are six basic colors (MB, RM, YR, GY) between the six basic colors. , CG, BC), and continuity is maintained by performing interpolation in the YC _{b Cr} space using the quasi-basic colors.
[0040]
The six quasi-basic colors are the middle colors in the RGB space of the six basic colors, and Table 1 summarizes the RGB values, YC _{b Cr} values, and hues of a total of 12 colors of the basic colors and quasi-basic colors.
[0041]
[Table 1]

[0042]
Hereinafter, red hue adjustment is considered as an example of the present embodiment.
[0043]
When the red hue by the user on the printer driver UI and designated to modify x degree, although the hue H _R of the original red of course, more near H _R 7 and (1) (12) The range of colors will be affected.
[0044]
Hue range of the (1) and (12), using the hue _{H RM, H YR} quasi reference color RM and YR, determined by the following interpolation calculation formula (see step S24).
(1) H ′ = H + x * (H _RM −H) / (H _RM −H _R )
(12) H ′ = H + x * (H−H _YR ) / (H _R −H _YR )
H represents a hue before adjustment, and H ′ represents a hue after adjustment.
[0045]
By performing the hue adjustment with this interpolation formula, the color in the vicinity of R (red) that is being adjusted as shown in FIG. 8 is greatly affected by the adjustment value, and the adjustment value changes as the color approaches RM or YR. It has the characteristic of not being affected, and the continuity of hues other than the target color can be maintained.
[0046]
Further, since not only red with the highest saturation but also colors from low saturation to high saturation having the same hue value change at the same rate, the continuity in the saturation direction is not impaired.
[0047]
Subsequently, the C _b C _r value (C _b C _r data) is changed using the calculated hue H ′ (see step S25).
Assuming that the data before hue adjustment is C _b and C _r and the data after adjustment is C _b ′ and C _r ′, C _b ′ and C _r ′ use hues H and H ′ before and after adjustment. , Using the conversion matrix table shown in FIG.
[0048]
Finally, the calculated C _b 'C _r ' value and the unchanged Y value are changed to RGB image data using the conversion matrix table shown in FIG. 4 (see step S26).
[0049]
In summary, in the present embodiment, when RGB image data is input, the RGB image data is converted into YC _b C _r image data, and the C _b C _r data of the converted YC _b C _r image data is converted. When the hue characteristic that displays the hue characteristic and displays the desired hue characteristic for the displayed hue characteristic is specified, the hue characteristic is changed based on the specified hue position, and the changed hue characteristic is obtained. based change the _C b _{C r} data of _YC b _{C r} image data, and each step of converting _YC b _{C r} image data into RGB image data based on the modified _C b _{C r} data. Then, a program for causing the computer to execute such a procedure is created, installed in the computer, and the print hue is adjusted by the printer driver.
[0050]
The RGB image obtained in this way is subjected to color matching processing as necessary as described above, and is then transferred to the printer for printing.
[0051]
FIG. 10 shows an example of a hue adjustment GUI performed by the user on the printer driver.
[0052]
In the figure, the hue adjustment GUI 100 includes a hue characteristic graph 50, a numerical value box 60, a reset button 70, and the like. The hue characteristic graph 50 includes a bar 51 representing a hue, a mouse pointer 52, and the like.
[0053]
The above-described hue circle is displayed on the GUI 100 (see FIGS. 6 and 7), and the hue characteristic graph 50 is displayed by displaying the bar 51 representing the hue on the basic six colors.
[0054]
The bar 51 can be dragged with the mouse, and the user can change the target hue by operating the bar 51 with the mouse pointer 52.
In addition, the hue can be changed numerically by using a keyboard.
[0055]
As shown in the drawing, a numerical value box 60 for inputting numerical values is prepared beside the hue characteristic graph 50, and the value of the hue of interest can be directly input thereto to change the value.
[0056]
The bar 51 representing the hue and the numerical value box 60 reflect data to each other. When the bar 51 is moved, the numerical value is changed, and when the numerical value is changed, the bar 51 is also moved.
[0057]
The hue adjustment range is set to ± 15 degrees in order to prevent continuity failure due to exceeding the adjacent basic colors, and limits are imposed on numerical input and bar movement beyond that.
[0058]
In addition, a reset button 70 is provided for invalidating the hue adjustment. Thereby, all the adjustment values operated so far can be reset to zero.
[0059]
【The invention's effect】
According to the first to fourth aspects of the present invention, means for displaying the hue characteristic as a graph on the hue ring, means for designating a hue position for obtaining a desired characteristic for the displayed hue characteristic for each hue, and Since the means for changing the hue characteristic based on the designated hue position is provided, the hue adjustment that can only be performed for the entire image can be performed for each hue. According to the first aspect of the present invention, even if the adjustment for each hue is possible, the hue adjustment that requires a complicated procedure can be easily performed.
[0060]
According to the second to fourth aspects of the present invention, since the means for changing the hue characteristic changes the parameter indicating the hue, and the printer changes the hue with reference to the parameter, various adjustments can be made with a simple configuration. It is possible to execute hue adjustment that can correspond to the sex.
[0061]
According to the third and fourth aspects of the present invention, since the display means is provided with a reset display for setting cancellation of hue adjustment by the designation means, comparison with the default can be easily performed before and after the hue change.
[0062]
According to the fourth aspect of the present invention, since the means for changing the hue characteristic is set in the printer driver installed in the computer, the above-described effects can be easily obtained simply by installing the printer driver in the computer. it can.
[0063]
According to the fifth, seventh, and eighth aspects of the present invention, a hue characteristic graph is displayed on the display screen of the computer, a hue position at which a desired characteristic can be obtained with respect to the displayed hue characteristic is designated, and Since the printer driver sets the hue characteristic based on the designated hue position and adjusts the hue with reference to the characteristic, the user can freely and intuitively perform the optimum hue adjustment, which satisfies the user's satisfaction. A high output result can be obtained.
[0064]
According to the invention of claims 6 to 8, wherein, when there is RGB image data input, display a first step of converting the YC _b C _r image data and the hue characteristic of the converted YC _b C _r image data A second procedure for changing the hue characteristic based on the designated hue position when a hue position capable of obtaining a desired characteristic with respect to the displayed hue characteristic is designated. A fourth procedure for changing the CbCr data of the YC _b C _r image data based on the hue characteristics, and a second procedure for converting the YC _b C _r image data into RGB image data based on the changed C _b C _r data. Since the procedure 5 is written as a program on the information recording medium, if the printer driver is installed in the computer using this information recording medium, any user is free and intuitively optimal. Can make a phase adjustment, it is possible to obtain a highly satisfactory user output.
[Brief description of the drawings]
FIG. 1 is a flowchart of a general color print.
FIG. 2 is a flowchart of hue adjustment in one embodiment of a hue adjustment apparatus, a hue adjustment method, a program, and a recording medium according to the present invention.
[Figure 3] hue adjustment device according to the present invention, a conversion formula of the hue adjustment method, a program, and the RGB in one embodiment of the recording medium to the YC _b C _r.
FIG. 4 is a conversion formula from YC _{b Cr} to RGB in an embodiment of a hue adjustment device, a hue adjustment method, a program, and a recording medium according to the present invention.
FIG. 5 is a YC _{b Cr} color space.
FIG. 6 is a hue circle obtained by plotting the relationship between C _b and C _r of YC _b C _r data.
FIG. 7 is a hue circle in which six quasi-basic colors are defined between six basic colors.
FIG. 8 is an explanatory diagram of movement of colors in the vicinity of R at the time of R adjustment in an embodiment of the hue adjustment device, the hue adjustment method, the program, and the recording medium according to the present invention.
[9] hue adjustment device according to the present invention, a conversion formula of the hue adjustment method, a program, and the C _b C _r in an embodiment of the recording medium to the C _{b 'C r'.}
FIG. 10 is an example of a hue adjustment apparatus, a hue adjustment method, a program, and a printer driver GUI according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Application 20 Printer driver 30 Printer controller 40 Printer engine 50 Hue characteristic graph 51 (Hue) bar 52 Mouse pointer 60 Numeric box 70 Reset button 100 Hue adjustment GUI

Claims (8)

A hue adjustment device that adjusts the hue of an output image of a printer that prints an image according to image data transferred from a computer,
The hue adjusting device is
Display means for displaying the hue characteristics as a graph on the hue ring;
Designating means for designating, for each hue, a hue position capable of obtaining a desired characteristic with respect to the hue characteristic displayed by the display means;
Hue characteristic changing means for changing the hue characteristic based on the hue position designated by the designation means;
A hue adjusting device characterized by comprising: The change of the hue characteristic is
The hue characteristic changing means changes the parameter indicating the hue,
The printer changes the hue with reference to the parameter;
The hue adjusting device according to claim 1, wherein the hue adjusting device is performed. The display means includes
Reset display means for setting cancellation of hue adjustment by the designation means;
The hue adjusting device according to claim 1, further comprising: The hue characteristic changing means is
4. The hue adjusting apparatus according to claim 1, wherein the hue adjusting apparatus is set in a printer driver installed in a computer. A hue adjustment method for adjusting a hue of an output image of a printer that prints an image according to image data transferred from a computer,
The hue adjustment method is:
A procedure for displaying a hue characteristic representing the hue characteristic on a display screen of a computer as a graph;
A procedure for designating a hue position at which a desired characteristic can be obtained with respect to the hue characteristic displayed on the display screen;
A procedure for a printer driver to change the hue characteristic based on the designated hue position and to adjust the hue with reference to the hue characteristic;
A hue adjustment method characterized by comprising: A program that is installed in a computer and adjusts the hue of a print by a printer driver,
When there is RGB image data input, the procedure for converting the RGB image data to _YC b _{C r} image data,
A step of displaying the color characteristics of the _C b _{C r} data of _YC b _{C r} image data the converter as a graph,
A procedure for changing the hue characteristic based on the designated hue position when a hue position capable of obtaining a desired characteristic is designated for the displayed hue characteristic;
Changing the C _b C _r data of the YC _b C _r image data based on the changed hue characteristics;
Converting the YC _b C _r image data into RGB image data based on the changed C _b C _r data;
A hue adjustment method characterized by comprising: The program for making a computer perform the procedure of Claim 5 or 6. A computer-readable recording medium on which the program according to claim 7 is recorded.

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