JPH0678947B2 - Mutual conversion method of emission control signal of CRT color display and object color CIE tristimulus value - Google Patents
Mutual conversion method of emission control signal of CRT color display and object color CIE tristimulus valueInfo
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- JPH0678947B2 JPH0678947B2 JP17293888A JP17293888A JPH0678947B2 JP H0678947 B2 JPH0678947 B2 JP H0678947B2 JP 17293888 A JP17293888 A JP 17293888A JP 17293888 A JP17293888 A JP 17293888A JP H0678947 B2 JPH0678947 B2 JP H0678947B2
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- color
- crt
- light source
- emission control
- color display
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Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明はCRTカラーディスプレイ画面上に表示された色
の光源色データである発光制御信号と物体色データであ
るCIE三刺激値の相互変換法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a mutual conversion method of a light emission control signal, which is light source color data of a color displayed on a CRT color display screen, and a CIE tristimulus value, which is object color data. Regarding
［従来の技術］ 近年コンピュータグラフィック装置（CG）を用いたデザ
イン作成が繊維、アパレル、自動車、家電、印刷等の多
方面の産業分野で行われるようになっており、概略のカ
ラーデザインイメージだけでなく最終デザインカラーの
決定までもCG上で行われるようになってきている。この
ためCGのCRTカラーディスプレイ画面上でデザイナが目
視観察により知覚して決定された色（光源色）をそれと
等価な物体色またはそのデータとして生産現場等に正確
に伝達する技術が必要となっている。[Prior Art] In recent years, design creation using computer graphic devices (CG) has been performed in various industrial fields such as textiles, apparel, automobiles, home appliances, and printing. Instead, even the final design color is being decided on CG. Therefore, it is necessary to have a technology to accurately transmit the color (light source color) that the designer perceives by visual observation on the CG CRT color display screen to the production site as an equivalent object color or its data. There is.
従来、CG上の色の伝達はインクジェットプリンタや写真
などの媒体で画面のハードコピーを作成し、このハード
コピーから物体色測定装置によって物体色データである
CIE三刺激値、または分光立体角反射率を得、この物体
色データに基づいてコンピュータ・カラー・マッチング
（CCM）処理などの調色現場作業を行うようにしてい
る。Conventionally, the transmission of colors on CG is the object color data by making a hard copy of the screen with a medium such as an ink jet printer or a photograph, and using this hard copy with an object color measuring device.
CIE tristimulus values or spectral solid angle reflectance are obtained, and on-site work such as computer color matching (CCM) processing is performed based on this object color data.
しかし、このようにハードコピーを色伝達の媒体として
用いることによって光源色データから物体色データへ変
換した場合、CRTカラーディスプレイの蛍光体とハード
コピーに用いられるインクや写真発色剤などとの分光特
性が本質的に異なるため、デザイナがCG上で知覚した色
を正確に再現したハードコピーを得ることができず、結
果的に光源色データから物体色データへの変換が非常に
不正確になるとともに、CGとCCMの結合など、デザイン
部門と調色現場の結合ができないという問題があった。However, when light source color data is converted to object color data by using a hard copy as a color transmission medium, the spectral characteristics of the CRT color display phosphor and the ink or photographic colorant used for the hard copy. The difference between the light source color data and the object color data is very inaccurate because a hard copy that accurately reproduces the colors perceived on the CG by the designer cannot be obtained. There was a problem that the design department and the toning site could not be combined, such as the combination of CG and CCM.
このようにハードコピーによる色伝達に精度的問題があ
る現状で、CG上でデザイナが知覚して決定した色を媒体
を経由せずに物体色データとしてCG側から転送する技術
が注目されている。In the current situation where there is an accuracy problem in color transmission by hard copy, attention is focused on the technology of transferring the color perceived and decided by the designer on CG from the CG side as object color data without passing through the medium. .
そして、色伝達媒体を用いないものとして、CRTカラー
ディスプレイ画面上に表示された光源色のRGB発光制御
信号を物体色CIE三刺激値のX,Y,Zに変換する変換式を用
いる方法が知られている。As a method without using a color transmission medium, there is known a method of using a conversion formula for converting the RGB light emission control signal of the light source color displayed on the CRT color display screen into the object color CIE tristimulus value X, Y, Z. Has been.
［発明が解決しようとする課題］ 上記従来技術においては、RGB発光制御信号の最大値
（制御信号が０〜255の場合は255）の時のCRTの白色発
光時の色度点がある色温度における白色点（ｘ′,y′）
と一致するようにCRTのホワイトバランス調整を行い、R
C=GC=BC=255、Ｙ=100、ｘ=ｘ′、ｙ=ｙ′を変換式の
kR，kG，kBの決定パラメータに用いている。[Problems to be Solved by the Invention] In the above-mentioned conventional technology, the color temperature having a chromaticity point during white light emission of a CRT at the maximum value of the RGB light emission control signal (255 when the control signal is 0 to 255). White point (x ', y') at
Adjust the white balance of the CRT so that
C = G C = B C = 255, Y = 100, x = x ', y = y'
It is used as the decision parameter for k R , k G , and k B.
しかし、これはCRT全体に一色で発光する光源色をCRTの
周囲が全く知覚されない暗室のような環境下で観察し、
その近傍に置いた物体にのみ照明光があたる標準白色光
（ホワイトバランス時の色度点と一致する色度点を有す
る光）を用意し、さらにCRTの白色と傍らに置いた現実
に存在しない完全白色体との輝度が一致するような条件
で照明光の明度を調整するといった現実のCRT観察の環
境とは全くかけ離れたものであり、実用化が困難である
という問題があった。However, this is when observing a light source color that emits one color on the entire CRT in an environment such as a dark room where the surroundings of the CRT are not perceived at all,
Standard white light (light having a chromaticity point that matches the chromaticity point at the time of white balance) that illuminates only the object placed near it is prepared, and it does not actually exist next to the white color of the CRT. There is a problem that it is very different from the actual CRT observation environment in which the brightness of the illumination light is adjusted under the condition that the brightness matches that of a perfect white body, and that practical application is difficult.
そこで本発明はCRTカラーディスプレイ画面上に表示さ
れた光源色の発光制御信号と物体色CIE三刺激値の相互
変換を現実のCRT並びに物体色の観察系において可能に
する相互変換法を提供することを目的とする。Therefore, the present invention provides a mutual conversion method that enables mutual conversion of a light emission control signal of a light source color displayed on a CRT color display screen and an object color CIE tristimulus value in an actual CRT and an object color observation system. With the goal.
［課題を解決するための手段］ 本発明のCRTカラーディスプレイの発光制御信号と物体
色CIE三刺激値の相互変換法は、CRTカラーディスプレイ
画面上において無彩色発光の背景色中に表示された光源
色と無彩色背景中の物体色とを同時に観察できる色比較
環境を設定し、この色比較環境下でCRTカラーディスプ
レイ画面上にCRTカラーディスプレイの三原色蛍光体R,
G,Bの何れもが発光して等色な状態に表現し得るCIE三刺
激値X,Y,Z既知の物体色と目視観察により等色と知覚さ
れる光源色を前記画面上に表示させたときのこの光源色
の発光制御信号をRC，GC，BCとし、前記物体色のCIE三
刺激値X,Y,Zと前記光源色の発光制御信号RC，GC，BCと
を用いて次式により未定係数kR，kG，kBを決定するよう
にしたものである。[Means for Solving the Problems] The mutual conversion method of the emission control signal of the CRT color display and the object color CIE tristimulus value of the present invention is a light source displayed in the background color of achromatic emission on the CRT color display screen. A color comparison environment that allows simultaneous observation of colors and object colors in an achromatic background is set, and under this color comparison environment, the CRT color display screen's three primary color phosphors R,
CIE tristimulus values X, Y, and Z that can be expressed in a color-matched state by illuminating both G and B are displayed on the screen with a known object color and a light-source color that is perceived as a color match by visual observation. Let the light emission control signals of this light source color be R C , G C , and B C, and the CIE tristimulus values X, Y, and Z of the object color and the light emission control signals R C , G C , and B C of the light source color. Using and, the undetermined coefficients k R , k G , and k B are determined by the following equation.
［実施例］ 以下、本発明の実施例を添付図面を参照して説明する。 Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図は本発明の原理を示す概略説明図であり、CRTカ
ラーディスプレイ画面１を観察しているデザイナ等の観
察者が例えば日本工業規格（JISZ8723）で規定するよう
な物体表面色の観察条件下にある物体色Ｂを画面と同時
に目視観察できる色比較環境を設定し、この色比較環境
下においてCRTカラーディスプレイ画面１に表示された
光源色Ａと物体色Ｂとが等価に知覚されているとすると
き、光源色Ａの色データと等価な物体色の物体色データ
とが正確に相互変換できることに基づいて発明されたも
のである。FIG. 1 is a schematic explanatory view showing the principle of the present invention. Observers such as a designer who are observing the CRT color display screen 1 observe the object surface color as specified by Japanese Industrial Standards (JISZ8723). A color comparison environment is set in which the underlying object color B can be visually observed simultaneously with the screen, and under this color comparison environment, the light source color A and the object color B displayed on the CRT color display screen 1 are perceived equivalently. In this case, the invention was invented based on the fact that the color data of the light source color A and the object color data of the equivalent object color can be accurately converted mutually.
第１図において、２は照明光源、３は物体色Ｂの無彩色
背景、４は物体色である標準色票、５は観察ポイント、
６は標準色票４と同じ大きさのCRT画面１上の調色領
域、７はCRT画面１上の白，黒，灰色などの無彩色の背
景色であり、その輝度については特に限定せず、任意の
明るさでよい。８は照明光源２の照明がCRT画面１上の
調色領域６及び背景色７に照射されないようにした遮光
板である。In FIG. 1, 2 is an illumination light source, 3 is an achromatic background of the object color B, 4 is a standard color chart of the object color, 5 is an observation point,
6 is a toning area on the CRT screen 1 having the same size as the standard color chart 4, and 7 is an achromatic background color such as white, black, or gray on the CRT screen 1, and its brightness is not particularly limited. , Any brightness is acceptable. Reference numeral 8 denotes a light shielding plate which prevents the illumination of the illumination light source 2 from irradiating the toning area 6 and the background color 7 on the CRT screen 1.
まず第１図で示す設定された色比較環境下で物体色Ｂを
見ている環境条件下のCIE三刺激値X,Y,Z既知の標準色票
４について、目視観察により等色として知覚される光源
色ＡをCRT画面１の調色領域６に表示させ、このときの
光源色Ａの発光制御信号をRC，GC，BCとする。但しここ
において選択した標準色票４はRC，GC，BCの何れもが０
でない色でなければならない。そして前記物体色ＢのCI
E三刺激値X,Y,Zと前記光源色Ａの発光制御信号RC，GC，
BCとを用いて下式（１）により未定係数kR，kG，kBを決
定し、決定されたkR，kG，kBを用いて前記色比較環境下
において発光制御信号と物体色CIE三刺激値の相互変換
を行うものである。First, the CIE tristimulus values X, Y, Z known standard color chart 4 under the environmental conditions in which the object color B is viewed under the set color comparison environment shown in FIG. 1 are perceived as equal colors by visual observation. The light source color A is displayed in the toning area 6 of the CRT screen 1, and the light emission control signals of the light source color A at this time are R C , G C , and B C. However, in the standard color chart 4 selected here, all of R C , G C , and B C are 0.
Must be a color that is not. And the CI of the object color B
E tristimulus values X, Y, Z and light emission control signals R C , G C of the light source color A,
The undetermined coefficients k R , k G , k B are determined by the following formula (1) using B C and the determined k R , k G , k B are used as the emission control signal in the color comparison environment. The object color CIE is used for mutual conversion of tristimulus values.
ここでxR，yR，zRはCRTカラーディスプレイの赤色蛍光
体のCIE色度座標、 xG，yG，zGはCRTカラーディスプレイの緑色蛍光体のCIE
色度座標、 xB，yB，zBはCRTカラーディスプレイの青色蛍光体のCIE
色度座標、 RC，GC，BCはCRTカラーディスプレイの発光制御信号、 f1，f2，f3はRC，GC，BCをCRTカラーディスプレイの実
際の発光輝度に比例する値に変換する（ガンマ補正す
る）関数を表わす。 Where x R , y R and z R are the CIE chromaticity coordinates of the red phosphor of the CRT color display, and x G , y G and z G are the CIE of the green phosphor of the CRT color display.
Chromaticity coordinates, x B , y B , z B are CIE of blue phosphor of CRT color display
Chromaticity coordinates, R C , G C , and B C are emission control signals of the CRT color display, and f 1 , f 2 , and f 3 are proportional to R C , G C , and B C to the actual emission brightness of the CRT color display. Represents a function that converts (gamma corrects) a value.
次に（１）式から未定係数kR，kG，kBを求める手順を説
明する。Next, the procedure for obtaining the undetermined coefficients k R , k G , and k B from equation (1) will be described.
まず、 とおき、また RO=f1（RC） ・・・（３） GO=f2（GC） ・・・（４） BO=f3（BC） ・・・（５） とおく。また（１）式は（２）（３）（４）（５）式に
よって整理すると、 となり、次式（７）になる。First, And R O = f 1 (R C ) ・ ・ ・ (3) G O = f 2 (G C ) ・ ・ ・ (4) B O = f 3 (B C ) ・ ・ ・ (5) deep. When formula (1) is rearranged by formulas (2), (3), (4) and (5), Then, the following equation (7) is obtained.
次に光源色Ａの発光制御信号RC，GC，BCを（３）（４）
（５）式に代入することで求められるRO，GO，BOと物体
色ＢのCIE三刺激値X,Y,Zとを（７）式に代入することに
より未定係数kR，kG，kBが求められ、 とするとき、（８）式より下式（９）式および（10）式
で示すように光源色Ａと物体色Ｂの相互変換が可能にな
る。 Next, the light emission control signals R C , G C , and B C of the light source color A are set to (3) (4)
By substituting R O , G O , B O and CIE tristimulus values X, Y, Z of the object color B obtained by substituting in equation (5) into equation (7), undetermined coefficients k R , k G and k B are calculated, Then, the mutual conversion of the light source color A and the object color B becomes possible as shown in the following equations (9) and (10) from the equation (8).
次にCRTカラーディスプレイとして島精機製作所（株）
製カラーグラフィックデザインシステムSDS−380（CRT:
三菱電気（株）製Ｃ−6919JG、CRT発光制御R,G,B各８ビ
ット256段階）を使った場合の実施例を示す。 Next, as a CRT color display, Shima Seiki Co., Ltd.
Color graphic design system SDS-380 (CRT:
An example of using C-6919JG manufactured by Mitsubishi Electric Corp., CRT light emission control R, G, B 8-bit 256 steps) will be described.
このCRTのf1，f2，f3の関数は４次の多項式を使うと下
式（11）（12）（13）で表される。The function of the CRT of f 1, f 2, f 3 is expressed by the following equation Using the quartic polynomial (11) (12) (13).
f1（RC）=-1.348・10-2+0.1712・RC -5.311・10-3・RC 2 +6.275・10-5・RC 3 -1.144・10-7・RC 4 ・・・（11） f2（GC）=1.779・10-2+0.0347・GC -2.932・10-3・GC 2 +4.216・10-5・GC 3 -6.205・10-8・GC 4 ・・・（12） f3（BC）=8.372・10-2+0.4161・BC -9.841・10-3・BC 2 +7.772・10-5・BC 3 -1.183・10-7・BC 4 ・・・（13） また、CRT三原色蛍光体R,G,Bの色度点で表される は下式（14）の様になる。f 1 (R C ) =-1.348 ・ 10 -2 +0.1712 ・ R C -5.311 ・ 10 -3・ R C 2 +6.275 ・ 10 -5・ R C 3 -1.144 ・ 10 -7・ R C 4・ ・・ (11) f 2 (G C ) = 1.779 ・ 10 -2 +0.0347 ・ G C -2.932 ・ 10 -3・ G C 2 +4.216 ・ 10 -5・ G C 3 -6.205 ・ 10 -8・ G C 4・ ・ ・ (12) f 3 (B C ) = 8.372 ・ 10 -2 +0.4161 ・ B C -9.841 ・ 10 -3・ B C 2 +7.772 ・ 10 -5・ B C 3 -1.183 ・ 10 -7・ B C 4・ ・ ・ (13) It is also expressed by the chromaticity points of CRT three primary color phosphors R, G, B Becomes like the following formula (14).
Ｃ光源で照明（物体色上の照度740l×）、N6.5無彩色の
背景で物体色を観察することとし、CRTの背景色を物体
色の背景の輝度と等しい輝度の無彩色に設定したとき、
無彩色標準色票（Ｘ=19.39,Y=19.77,X=23.37）と等しい
色として知覚されるCRTの光源色の発光制御信号がRC=13
9,GC=136,BC=133であり、このような色比較環境として は下式（15）のように求められる。 Illumination with C light source (illuminance on the object color is 740 lx), and the object color is to be observed on an N6.5 achromatic background, and the background color of the CRT is set to an achromatic color whose brightness is equal to the brightness of the background of the object color. When
The emission control signal of the light source color of the CRT which is perceived as a color equal to the standard color chart (X = 19.39, Y = 19.77, X = 23.37) is R C = 13.
9, G C = 136, B C = 133, and as such a color comparison environment Is calculated by the following equation (15).
式（３）（４）（５）（９）（10）（15）より（16）
（17）に示される（RGB）→（XYZ），（XYZ）→（RGB）
の相互変換式が求められる。 From formulas (3) (4) (5) (9) (10) (15) (16)
(RGB) → (XYZ), (XYZ) → (RGB) shown in (17)
The mutual conversion formula of is required.
（16）（17）の相互変換式は前記色比較環境でCRTの色
表現範囲で成立することを任意の色について色覚正常者
５名を被験者として認識した。(16) It was recognized that the color conversion range of CRT was satisfied in the above-mentioned color comparison environment in the mutual conversion formulas of (17) and 5 color-blind persons were tested as subjects for arbitrary colors.
Ｘ=0.2162・RO+0.1506・GO+0.1437・BO Ｙ=0.1163・RO+0.3535・GO+0.0668・BO Ｚ=0.0104・RO+0.0654・GO+0.7571・BO ・・・（16） RO=5.9369・Ｘ-2.3587・Ｙ-0.9187・Ｚ GO=-1.9697・Ｘ+3.6582・Ｙ+0.0512・Ｚ BO=0.0886・Ｘ-02835・Ｙ+1.3290・Ｚ ・・・（17） 尚、第１図で示される色比較環境下でCIE三刺激値X,Y,Z
既知の物体色（標準色票）と等色として知覚される光源
色をCRT画面１の調色領域６に表示させるとき、発光制
御信号RC，GC，BCの決定を目視観察によらず前記物体色
表面からの反射光と前記光源色の双方の光を測定するこ
とで得る方法も検討したが、物体色ならびに光源色双方
の背景からの光への考慮，測定立体角への考慮など測定
上の制約が多く、また、視感覚との一致度を考えたとき
目視観察に勝る方法ではなかった。X = 0.2162 ・ R O +0.1506 ・ G O +0.1437 ・ B O Y = 0.1163 ・ R O +0.3535 ・ G O +0.0668 ・ B O Z = 0.0104 ・ R O +0.0654 ・ G O +0.7571 ・ B O・ ・・ (16) R O = 5.9369 ・ X-2.3587 ・ Y-0.9187 ・ Z G O = -1.9697 ・ X + 3.6582 ・ Y + 0.0512 ・ Z B O = 0.0886 ・ X-02835 ・ Y + 1.3290 ・ Z ・ ・ ・(17) CIE tristimulus values X, Y, Z under the color comparison environment shown in Fig. 1.
When the light source color perceived as the same color as the known object color (standard color chart) is displayed in the toning area 6 of the CRT screen 1, the light emission control signals R C , G C , and B C are determined by visual observation. Although the method of obtaining by measuring both the light reflected from the object color surface and the light of the light source color was also examined, consideration of light from the background of both the object color and the light source color, consideration of the measurement solid angle There are many measurement restrictions, and when considering the degree of agreement with visual sensation, this method was not superior to visual observation.
［発明の効果］ 本発明はCRTカラーディスプレイ画面上において無彩色
発光の背景色中に表示された光源色と無彩色背景中の物
体色とを同時に観察できる色比較環境を設定し、この色
比較環境下でCRTカラーディスプレイ画面上にCRTカラー
ディスプレイの三原色蛍光体R,G,Bの何れもが発光して
等色な状態に表現し得るCIE三刺激値X,Y,Z既知の物体色
と目視観察により等色と知覚される光源色を前記画面上
に表示させたときのこの光源色の発光制御信号をRC，
GC，BCとし、前記物体色のCIE三刺激値X,Y,Zと前記光源
色の発光制御信号RC，GC，BCとを用いて（１）式により
未定係数kR，kG，kBを決定することによりCRTカラーデ
ィスプレイ画面上に表示された光源色の発光制御信号と
物体色CIE三刺激値の相互変換を現実のCRT並びに物体色
の観察系において可能にする相互変換法を提供できる。EFFECTS OF THE INVENTION The present invention sets up a color comparison environment in which a light source color displayed in an achromatic background color on a CRT color display screen and an object color in an achromatic background can be observed simultaneously, and this color comparison is performed. Under the environment CRT color display screen CIE tristimulus values X, Y, Z known object colors that can be expressed in a uniform color by illuminating any of the three primary color phosphors R, G, B of the CRT color display The light emission control signal of this light source color when the light source color perceived to be the same color by visual observation is displayed on the screen is R C ,
G C and B C , the CIE tristimulus values X, Y and Z of the object color and the emission control signals R C , G C and B C of the light source color are used to determine an undetermined coefficient k R by the equation (1), By determining k G and k B , it becomes possible to perform mutual conversion between the light emission control signal of the light source color displayed on the CRT color display screen and the object color CIE tristimulus value in the actual CRT and the object color observation system. Can provide a conversion method.
第１図は本発明の概略説明図である。 １…CRTカラーディスプレイ画面 ２…照明光源 ３…物体色Ｂの無彩色背景 ７…光源色Ａの無彩色背景 Ａ…光源色 Ｂ…物体色 FIG. 1 is a schematic explanatory view of the present invention. 1 ... CRT color display screen 2 ... Illumination light source 3 ... Achromatic background of object color B 7 ... Achromatic background of light source color A A ... Light source color B ... Object color
Claims (2)
彩色発光の背景色中に表示された光源色と無彩色背景中
の物体色とを同時に観察できる色比較環境を設定し、こ
の色比較環境下でCRTカラーディスプレイ画面上にCRTカ
ラーディスプレイの三原色蛍光体R,G,Bの何れもが発光
して等色な状態に表現し得るCIE三刺激値X,Y,Z既知の物
体色と目視観察により等色と知覚される光源色を前記画
面上に表示させたときのこの光源色の発光制御信号を
RC，GC，BCとし、前記物体色のCIE三刺激値X.Y.Zと前記
光源色の発光制御信号RC，GC，BCとを用いて次の式によ
り未定係数kR，kG，kBを決定し、決定されたkR，kG，kB
を用いて前記色比較環境下において任意の光源色と物体
色の相互変換を行うことを特徴とするCRTカラーディス
プレイの発光制御信号と物体色CIE三刺激値の相互変換
法。 但し、XR，yR，ZRはCRTカラーディスプレイの赤色蛍光
体のCIE色度座標、 XG，yG，ZGはCRTカラーディスプレイの緑色蛍光体のCIE
色度座標、 XB，yB，ZBはCRTカラーディスプレイの青色蛍光体のCIE
色度座標、 f1，f2，f3はRC，GC，BCをCRTカラーディスプレイの実
際の発光輝度に比例する値に変換する関数を表わす。1. A color comparison environment in which a light source color displayed in an achromatic background color on a CRT color display screen and an object color in an achromatic background can be observed at the same time is set under the color comparison environment. CRT color display CIE tristimulus values X, Y, Z which can express all three primary color phosphors R, G, B of the CRT color display on the screen in a uniform color state By known object color and visual observation The light emission control signal of this light source color when the light source color perceived as a uniform color is displayed on the screen
R C , G C , and B C , using the CIE tristimulus values XYZ of the object color and the emission control signals R C , G C , and B C of the light source color, the undetermined coefficients k R and k G , K B, and the determined k R , k G , k B
An interconversion method of a light emission control signal of a CRT color display and an object color CIE tristimulus value, characterized in that an arbitrary light source color and an object color are mutually converted under the color comparison environment by using. Where X R , y R , and Z R are the CIE chromaticity coordinates of the red phosphor of the CRT color display, and X G , y G , and Z G are the CIE of the green phosphor of the CRT color display.
Chromaticity coordinates, X B , y B , Z B are CIE of blue phosphor of CRT color display
Chromaticity coordinates, f 1 , f 2 , and f 3 represent functions that convert R C , G C , and B C into values proportional to the actual emission brightness of a CRT color display.
色は任意の輝度を有する無彩色であることを特徴とする
請求項１記載のCRTカラーディスプレイの発光制御信号
と物体色CIE三刺激値の相互変換法。2. The mutual relation between the light emission control signal of the CRT color display and the object color CIE tristimulus value according to claim 1, wherein the background color on the CRT color display screen is an achromatic color having an arbitrary brightness. Conversion method.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17293888A JPH0678947B2 (en) | 1988-07-12 | 1988-07-12 | Mutual conversion method of emission control signal of CRT color display and object color CIE tristimulus value |
| DE89307028T DE68909701T2 (en) | 1988-07-12 | 1989-07-11 | Method for converting color data of a light source and color data of a non-luminous object. |
| US07/378,664 US5033857A (en) | 1988-07-12 | 1989-07-11 | Method of transforming light-source color data and non-luminous object color data |
| EP89307028A EP0351188B1 (en) | 1988-07-12 | 1989-07-11 | Method of transforming the light-source color data and the non-luminous object color data |
| CA000605415A CA1319990C (en) | 1988-07-12 | 1989-07-12 | Method of transforming the light-source color data and the nonluminous object color data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17293888A JPH0678947B2 (en) | 1988-07-12 | 1988-07-12 | Mutual conversion method of emission control signal of CRT color display and object color CIE tristimulus value |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0222523A JPH0222523A (en) | 1990-01-25 |
| JPH0678947B2 true JPH0678947B2 (en) | 1994-10-05 |
Family
ID=15951133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17293888A Expired - Fee Related JPH0678947B2 (en) | 1988-07-12 | 1988-07-12 | Mutual conversion method of emission control signal of CRT color display and object color CIE tristimulus value |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0678947B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0474935A (en) * | 1990-07-16 | 1992-03-10 | Kanebo Ltd | Method for mutual conversion of emission control signal of crt color display and cie tristimulus values of object color |
| US6081254A (en) * | 1993-08-12 | 2000-06-27 | Hitachi, Ltd. | Color correction system of imaging apparatus |
| JP3504040B2 (en) * | 1995-09-12 | 2004-03-08 | 株式会社マイクロ・テクニカ | Color unevenness identification method for color display and automatic identification device by the method |
| US5956015A (en) * | 1995-12-18 | 1999-09-21 | Ricoh Company, Ltd. | Method and system for correcting color display based upon ambient light |
| JP6241217B2 (en) * | 2013-11-13 | 2017-12-06 | 富士ゼロックス株式会社 | Chromaticity measuring device, color adjusting device, chromaticity measuring system, program, and chromaticity measuring method |
| JP6547296B2 (en) * | 2014-12-26 | 2019-07-24 | 凸版印刷株式会社 | Display device |
| JP6439531B2 (en) * | 2015-03-24 | 2018-12-19 | 富士ゼロックス株式会社 | Color processing apparatus, color processing system, and program |
| JP6737383B2 (en) * | 2019-06-27 | 2020-08-05 | 凸版印刷株式会社 | Computers and programs |
-
1988
- 1988-07-12 JP JP17293888A patent/JPH0678947B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0222523A (en) | 1990-01-25 |
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