JP2831107B2 - Color control device - Google Patents
Color control deviceInfo
- Publication number
- JP2831107B2 JP2831107B2 JP2221241A JP22124190A JP2831107B2 JP 2831107 B2 JP2831107 B2 JP 2831107B2 JP 2221241 A JP2221241 A JP 2221241A JP 22124190 A JP22124190 A JP 22124190A JP 2831107 B2 JP2831107 B2 JP 2831107B2
- Authority
- JP
- Japan
- Prior art keywords
- density
- supply amount
- halftone dot
- solid portion
- change
- 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 - Lifetime
Links
Landscapes
- Rotary Presses (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、平版オフセツト印刷機の色調制御に適用さ
れる自動制御装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic control device applied to color tone control of a lithographic offset printing press.
第6図の装置概略配置図、第7図の制御ブロツク線図
に湿すように、従来は印刷物1のベタ部分2のみの濃度
をライン型イメージカメラ7で検出し、目標ベタ部分濃
度3との偏差が0になるように、制御装置(コンピュー
タ)4よりインキ供給装置(インキ・キー開度制御装
置)5に信号を与えインキ供給量を制御している。Conventionally, as shown in FIG. 6 and the control block diagram of FIG. 7, the density of only the solid portion 2 of the printed matter 1 is detected by the line type image camera 7, and the target solid portion density 3 The control unit (computer) 4 supplies a signal to an ink supply unit (ink key opening degree control unit) 5 to control the ink supply amount so that the deviation of the ink supply amount becomes zero.
1) 第2図(a)〜(d)に示すように印刷物1の色
調は、印刷物1のベタ部分2の濃度変化及び網点部分6
の濃度変化により影響を受けるが、インキ供給量制御の
みでは、両者の濃度を同時に適正値にすることができな
い。なぜならば、環境変動等によるインキ中への湿し水
供給量の変化によっても両者は、変化してしまうからで
ある。1) As shown in FIGS. 2 (a) to 2 (d), the color tone of the print 1 is determined by the density change of the solid portion 2 and the halftone dot 6 of the print 1.
However, the density of both inks cannot be simultaneously adjusted to an appropriate value only by controlling the ink supply amount. This is because both of them change even when the amount of fountain solution supplied to the ink changes due to environmental fluctuations or the like.
2) 第2図(d)図に示すように、インキ供給量制御
のみでは、色調(コントラスト)を最適に制御すること
はできない。2) As shown in FIG. 2 (d), the color tone (contrast) cannot be optimally controlled only by controlling the ink supply amount.
ベタ部分の濃度及び網点部分の濃度をそれぞれ目標ベ
タ部分の濃度及び網点部分の濃度に保つことにより、色
調を常に適正に保つ。このため、次のような具体的手段
を講ずる。By maintaining the density of the solid portion and the density of the halftone portion at the density of the target solid portion and the density of the halftone portion, respectively, the color tone is always properly maintained. For this reason, the following specific measures are taken.
1) 印刷物のベタ部分の濃度及び網点部分の濃度を検
知するセンサを設ける。1) A sensor for detecting the density of a solid portion and the density of a halftone dot portion of a printed matter is provided.
2) 基礎実験により、第2図(a)〜(d)に示すよ
うなインキ及び湿し水供給量変化に対するベタ部及び網
点部の濃度変化特性を把握しておき、そのデータを基
に、ベタ部及び網点部の濃度変化に対するインキ及び湿
し水供給量変化を求める重回帰分析式を予め求めてお
く。2) By a basic experiment, the density change characteristics of the solid portion and the halftone dot portion with respect to the change of the supply amount of the ink and the dampening solution as shown in FIGS. 2 (a) to 2 (d) are grasped, and based on the data, A multiple regression analysis formula for calculating the change in the supply amount of the ink and the dampening solution with respect to the change in the density of the solid portion and the halftone dot portion is obtained in advance.
3) 目標ベタ部分の濃度及び網点部分の濃度と現在の
ベタ部分の濃度及び網点部分の濃度とを比較し、その偏
差値を上記2)項で求めた重回帰式で演算し、インキ供
給量及び湿し水供給量を適正に上記インキ供給量および
湿し水供給量の設定に基づいて、インキ供給装置および
湿し水供給装置を制御する信号を出力する。3) The density of the target solid portion and the density of the halftone dot portion are compared with the density of the current solid portion and the density of the halftone dot portion, and the deviation value is calculated by the multiple regression equation obtained in the above 2). A signal for controlling the ink supply device and the dampening solution supply device is output based on the setting of the ink supply amount and the dampening solution supply amount appropriately for the supply amount and the dampening solution supply amount.
予め、目標ベタ部分の濃度と階調を最大にする目標点
部分の濃度を制御装置に入力し、センサから送られてく
る現在のベタ部分の濃度及び網点部分の濃度と前記目標
値とを、インキ供給量及び湿し水供給量変化に対するベ
タ部分及び網点部分の濃度変化特性に基づいて比較演算
することによりインキ供給量及び湿し水供給量変化を設
定し、制御装置よりインキ供給装置及び湿し水供給装置
に信号を与え、各供給量を変化させることにより、常に
色調を適正値とするよう制御する。In advance, the density of the target solid portion and the density of the target point portion that maximizes the gradation are input to the control device, and the current density of the solid portion and the density of the halftone dot portion sent from the sensor are compared with the target value. The ink supply amount and the dampening water supply amount change are set by comparing and calculating based on the density change characteristics of the solid portion and the halftone dot portion with respect to the ink supply amount and the dampening solution supply amount change. By supplying a signal to the dampening water supply device and changing each supply amount, control is performed so that the color tone always has an appropriate value.
本発明の実施例を第1図乃至第5図について説明す
る。図において、1は印刷物、2はベタ部分、3は目標
ベタ部分濃度、4は制御装置(コンピユータ)、5はイ
ンキ供給装置(インキ・キー開度制御装置)、6は網点
部分、7はライン型イメージカメラ、8はキー巾、9は
くわえ、10は尻、11はパツチ、12は画像メモリ、13は目
標網点部分濃度、14は湿し水供給装置(水元ローラ回転
量制御装置)である。An embodiment of the present invention will be described with reference to FIGS. In the figure, 1 is a printed matter, 2 is a solid portion, 3 is a target solid portion density, 4 is a control device (computer), 5 is an ink supply device (ink key opening degree control device), 6 is a halftone dot portion, and 7 is a dot portion. Line type image camera, 8 is the key width, 9 is the mouth, 10 is the butt, 11 is the patch, 12 is the image memory, 13 is the target halftone dot density, 14 is the dampening water supply device (water roller rotation amount control device) ).
1) 基礎実験により、第2図(a)〜(d)に示すよ
うなインキおよび湿し水供給量変化に対するベタ部およ
び網点部の濃度変化特性を把握しておき、そのデータを
基に、ベタ部および網点部の濃度変化に対するインキ供
給量および湿し水供給量変化を求める重回帰分析式を予
め求め、該濃度変化特性に対する重回帰式を制御装置4
に記憶させる。1) By a basic experiment, the density change characteristics of the solid portion and the halftone dot portion with respect to the change of the supply amount of the ink and the dampening solution as shown in FIGS. 2 (a) to 2 (d) are grasped, and based on the data, , A multiple regression analysis formula for calculating the ink supply amount and the dampening solution supply change with respect to the density change of the solid portion and the halftone dot portion is obtained in advance, and the multiple regression formula for the density change characteristic is calculated by the control device 4.
To memorize.
2) 第3図に示すように、印刷物1のキー巾8毎にお
ける天地方向及び幅方向の適正なベタ部分2の濃度及び
網点部分6(色が混在していない部分、すなわち、制御
したい色のみ存在する網点部分6)の目標濃度を制御装
置4に入力する(ベタ部分2及び網点部分6が存在しな
いキー巾8は印刷物1のくわえ9或いは尻10部分にベタ
部分2及び網点部分6のパッチ11を予め設けておく)。2) As shown in FIG. 3, the proper density of the solid portion 2 and the halftone dot portion 6 (portion where colors are not mixed, that is, the color to be controlled, The target density of the halftone dot portion 6 which exists only is input to the control device 4 (the key width 8 where the solid portion 2 and the halftone dot portion 6 do not exist is the solid portion 2 and the halftone dot portion at the edge 9 or the tail 10 of the printed matter 1). The patch 11 of the part 6 is provided in advance).
3) 第4図に示すようにライン型イメージカメラ7に
より運転中の印刷物1の幅方向濃度を天地方向に計測
し、制御装置4内の画像メモリ12に蓄えておく。3) As shown in FIG. 4, the density in the width direction of the printed matter 1 being operated is measured in the vertical direction by the line type image camera 7 and stored in the image memory 12 in the control device 4.
4) キー巾8毎の上記1)項で指定した位置のベタ部
分2の濃度及び網点部分6の濃度を画像メモリ12内から
呼び出し、目標ベタ部分濃度3及び目標網点部分濃度13
と比較する。4) The density of the solid portion 2 and the density of the halftone dot portion 6 at the position designated in the above item 1) are retrieved from the image memory 12 for each key width 8, and the target solid partial density 3 and the target halftone dot density 13 are retrieved.
Compare with
5) 上記4)項における比較によりこれらの偏差値を
求め、該偏差値を上記1)項における制御装置4内に予
め設定しておいたベタ部分2及び網点部分6の濃度変化
からインキ及び湿し水供給量変化を推定する重回帰式に
代入することによって、インキ供給装置5及び湿し水供
給量装置14に適正な信号を与える。5) These deviation values are obtained by comparison in the above item 4), and the deviation values are obtained from the density changes of the solid portion 2 and the halftone dot portion 6 preset in the control device 4 in the item 1). An appropriate signal is given to the ink supply device 5 and the dampening water supply device 14 by substituting into the multiple regression equation for estimating the change in the dampening water supply amount.
6) インキ供給装置5及び湿し水供給装置14には、前
記偏差値が0になるまで制御装置から信号が送られ、イ
ンキ供給量及び湿し水供給量を常に適正に保つ。6) A signal is sent from the control device to the ink supply device 5 and the dampening solution supply device 14 until the deviation value becomes zero, and the ink supply amount and the dampening solution supply amount are always kept properly.
上記の色調制御行程をブロツク線図で示すと第5図の
ようになる。FIG. 5 is a block diagram showing the above tone control process.
本発明による色調制御装置は、印刷物のベタ部分及び
網点部分の濃度を検出する手段と、インキ供給量及び湿
し水供給量変化に対するベタ部分及び網点部分の濃度変
化特性に基づいて、予め入力された目標ベタ部分及び網
点部分の濃度と、前記検出手段により得られた印刷物の
ベタ部分及び網点部分の濃度とを比較演算してインキ供
給量及び湿し水供給量変化を設定する手段と、前記比較
演算の結果に基づいてインキ供給量及び湿し水供給量を
制御する手段とを具えたことにより、次の効果を有す
る。The color tone control device according to the present invention includes means for detecting the density of a solid portion and a halftone portion of a printed matter, and a density change characteristic of a solid portion and a halftone portion with respect to a change in an ink supply amount and a dampening solution supply amount. The input density of the target solid portion and the halftone dot portion are compared with the density of the solid portion and the halftone portion of the printed matter obtained by the detection means to calculate the ink supply amount and the dampening solution supply amount change. Means and means for controlling the ink supply amount and the dampening solution supply amount based on the result of the comparison operation have the following effects.
1) 印刷物の色調及び階調は、印刷物のベタ部分の濃
度及び網点部分の濃度変化により影響されるが、本発明
ではインキ供給量及び湿し水供給量の両方を濃度特性変
化に基づいて同時に制御するので、両者の濃度を同時に
適正値にすることができる。1) The color tone and gradation of the printed matter are influenced by the density change of the solid portion and the halftone dot portion of the printed matter. In the present invention, both the ink supply amount and the dampening solution supply amount are determined based on the density characteristic change. Since the control is performed at the same time, the concentrations of the two can be simultaneously set to the appropriate values.
第1図は本発明の実施例に係わる色調制御装置の概略配
置図、第2図(a)〜(d)はインキ及び湿し水供給量
変化に基づくベタ部分濃度及び網点部分濃度の変化に関
する実験データから得られたグラフ、第3図は制御装置
に入力する適正ベタ部分濃度及び網点部分濃度を示す
図、第4図は印刷機運転中の紙面濃度をライン型イメー
ジカメラによって制御装置内画像メモリに出力する機構
を示した図、第5図は本発明による色調制御ブロツク線
図、第6図は従来の色調制御装置を示す概略配置図、第
7図は従来の色調制御ブロツク線図である。 1……印刷物、2……ベタ部分 3……目標ベタ部分濃度、4……制御装置 5……インキ供給装置、6……網点部分 7……ライン型イメージカメラ 13……目標網点部分濃度 14……湿し水供給装置FIG. 1 is a schematic layout diagram of a color tone control device according to an embodiment of the present invention, and FIGS. 2 (a) to 2 (d) show changes in solid partial density and halftone dot density based on changes in ink and dampening solution supply amounts. FIG. 3 is a graph showing the appropriate solid partial density and halftone dot density inputted to the control device, and FIG. 4 is a graph showing the paper surface density during operation of the printing press by a line image camera. FIG. 5 shows a mechanism for outputting to the internal image memory, FIG. 5 is a color tone control block diagram according to the present invention, FIG. 6 is a schematic layout diagram showing a conventional color tone control device, and FIG. 7 is a conventional color tone control block line. FIG. 1 Printed matter 2 Solid area 3 Target solid area density 4 Control unit 5 Ink supply device 6 Halftone area 7 Line image camera 13 Target halftone area Concentration 14 ... Dampening water supply device
───────────────────────────────────────────────────── フロントページの続き (72)発明者 金子 雅仁 広島県広島市西区観音新町4丁目6番22 号 三菱重工業株式会社広島研究所内 (56)参考文献 特開 昭64−67342(JP,A) 特開 昭63−166541(JP,A) 特開 昭61−40159(JP,A) (58)調査した分野(Int.Cl.6,DB名) B41F 7/24,31/02,33/10──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Masahito Kaneko 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Hiroshima Research Laboratory (56) References JP-A-64-67342 (JP, A) JP-A-63-166541 (JP, A) JP-A-61-40159 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) B41F 7/24, 31/02, 33/10
Claims (1)
出する手段と、 インキ供給量及び湿し水供給量変化に対するベタ部分及
び網点部分の濃度変化特性に基づいて、予め入力された
目標ベタ部分及び網点部分の濃度と、前記検出手段によ
り得られた印刷物のベタ部分及び網点部分の濃度とを比
較演算してインキ供給量及び湿し水供給量変化を設定す
る手段と、 前記比較演算の結果に基づいてインキ供給量及び湿し水
供給量を制御する手段とを具えたことを特徴とする色調
制御装置。1. A means for detecting the density of a solid portion and a halftone dot portion of a printed matter, and a pre-input based on a density change characteristic of the solid portion and a halftone portion with respect to a change of an ink supply amount and a dampening solution supply amount. Means for comparing the density of the target solid portion and the halftone dot portion with the density of the solid portion and the halftone dot portion of the printed matter obtained by the detection means to set the ink supply amount and the dampening solution supply amount change; Means for controlling an ink supply amount and a dampening solution supply amount based on a result of the comparison operation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2221241A JP2831107B2 (en) | 1990-08-24 | 1990-08-24 | Color control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2221241A JP2831107B2 (en) | 1990-08-24 | 1990-08-24 | Color control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04103351A JPH04103351A (en) | 1992-04-06 |
JP2831107B2 true JP2831107B2 (en) | 1998-12-02 |
Family
ID=16763680
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2221241A Expired - Lifetime JP2831107B2 (en) | 1990-08-24 | 1990-08-24 | Color control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2831107B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1245388A1 (en) | 2001-03-29 | 2002-10-02 | Dainippon Screen Mfg. Co., Ltd. | Method of feeding dampening water in a printing machine |
WO2003033266A1 (en) * | 2001-10-15 | 2003-04-24 | Toppan Printing Co., Ltd. | Printing method, printed matter, and printing controller |
US6918339B2 (en) | 2003-05-15 | 2005-07-19 | Dainippon Screen Mfg. Co., Ltd. | Method of controlling a feed rate of dampening water in an offset press |
US7836826B2 (en) | 2005-02-16 | 2010-11-23 | Dainippon Screen Mfg Co., Ltd. | Dampening water regulating scale, and dampening water control method |
US7992493B2 (en) | 2005-01-26 | 2011-08-09 | Dainippon Screen Mfg Co., Ltd. | Dampening water control method and printing apparatus |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106218217B (en) * | 2016-07-20 | 2018-11-16 | 长兴佳迪嘉科技有限公司 | Novel ink-scraping device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6140159A (en) * | 1984-08-01 | 1986-02-26 | Toppan Printing Co Ltd | Flat-bed proof press |
DE3643721A1 (en) * | 1986-12-20 | 1988-06-30 | Heidelberger Druckmasch Ag | PRINT CONTROL STRIP |
-
1990
- 1990-08-24 JP JP2221241A patent/JP2831107B2/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1245388A1 (en) | 2001-03-29 | 2002-10-02 | Dainippon Screen Mfg. Co., Ltd. | Method of feeding dampening water in a printing machine |
US6601512B2 (en) | 2001-03-29 | 2003-08-05 | Dainippon Screen Mfg., Co., Ltd. | Method of feeding dampening water in a printing machine |
WO2003033266A1 (en) * | 2001-10-15 | 2003-04-24 | Toppan Printing Co., Ltd. | Printing method, printed matter, and printing controller |
US6983695B2 (en) | 2001-10-15 | 2006-01-10 | Toppan Printing Co., Ltd. | Printing method, printed matter, and printing control device |
CN1309563C (en) * | 2001-10-15 | 2007-04-11 | 凸版印刷株式会社 | Printing method, printed matter, and printing control device |
US6918339B2 (en) | 2003-05-15 | 2005-07-19 | Dainippon Screen Mfg. Co., Ltd. | Method of controlling a feed rate of dampening water in an offset press |
US7992493B2 (en) | 2005-01-26 | 2011-08-09 | Dainippon Screen Mfg Co., Ltd. | Dampening water control method and printing apparatus |
US7836826B2 (en) | 2005-02-16 | 2010-11-23 | Dainippon Screen Mfg Co., Ltd. | Dampening water regulating scale, and dampening water control method |
Also Published As
Publication number | Publication date |
---|---|
JPH04103351A (en) | 1992-04-06 |
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