WO1991006173A1 - Dispositif pour la fabrication d'un film d'impression ou d'un film de selection des couleurs au moyen d'un scanner a tambour - Google Patents

Dispositif pour la fabrication d'un film d'impression ou d'un film de selection des couleurs au moyen d'un scanner a tambour Download PDF

Info

Publication number
WO1991006173A1
WO1991006173A1 PCT/EP1990/000703 EP9000703W WO9106173A1 WO 1991006173 A1 WO1991006173 A1 WO 1991006173A1 EP 9000703 W EP9000703 W EP 9000703W WO 9106173 A1 WO9106173 A1 WO 9106173A1
Authority
WO
WIPO (PCT)
Prior art keywords
color
brightness
mixing head
film
drum scanner
Prior art date
Application number
PCT/EP1990/000703
Other languages
German (de)
English (en)
Inventor
Detlev Schmerler
Original Assignee
Bbs Ag International
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bbs Ag International filed Critical Bbs Ag International
Publication of WO1991006173A1 publication Critical patent/WO1991006173A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/6011—Colour correction or control with simulation on a subsidiary picture reproducer

Definitions

  • the present invention relates to a device for producing a printing film or color separation film according to the preamble of claim 1.
  • a drum scanner is a device which has a drum-shaped holder for a positive or negative original, which is rotatable about its drum axis, wherein during the drum rotation a scanning of the image original is carried out, during which a relative displacement of the scanning device for generating the image signal and the drum in axial direction follows, so that ultimately every pixel of the original is scanned sequentially by rotating the drum and moving it axially.
  • the image signal generated in this way is digitized and broken down by a computer of the drum scanner into individual digitized control signals for the colors yellow, magenta, cyan and black, a printer using these control signals to produce color separation films for the colors yellow, magenta, cyan and a black separation film generated. These films can be used to print the template. Since each original has a certain color cast and its brightness values usually do not correspond to the brightness values of an optimal original, the known drum scanner also has input means for entering color correction values or brightness correction values.
  • a system for producing color separation printing plates or printing films is known, in which, in accordance with the known drum scanner system described above, a point-by-point scanning of an original is first carried out, the image signals being digitized again and broken down into color components which can be corrected for their color, the color-corrected image signals of the individual color components being able to be fed to a printer for producing the respective color separation printing plates or color separation printing films.
  • the color-corrected signal can be displayed on an image display.
  • this known system corresponds to the drum scanner device described at the beginning.
  • the object of the present invention is to develop a device for producing a printing film or color separation film with a drum scanner in such a way that the determination of a brightness correction value and / or a color correction value for the drum scanner is simplified and made more precise, the time required to determine the relevant correction value is shortened.
  • the object of the invention is used to determine a correction value by means of an analog, real-time correction value detection device which is essentially formed from a color mixing head, a video device and a monitor.
  • the color mixing head produces a light which can be adjusted in terms of color and brightness for the exposure of the original, which for this purpose is preferably placed on a master stage, the master thus exposed being displayed on a monitor by means of a video device. Every change in the setting of the color mixing head can be detected immediately in real time on the monitor, so that an optimal color mixing head setting for the relevant template can be determined in a simple and time-saving manner.
  • the relevant setting values of the color mixing head can be easily used as color and brightness or density correction values with which the drum scanner works when the same scanner is scanned to produce the printing films or color separation films after the entire system has been calibrated once.
  • the brightness and / or color temperature of the light generated by the color mixing head is preferably detected by a sensor, the output signal of which is displayed on a display device, on the basis of the brightness and / or color correction values of the drum scanner can be set.
  • Such manual adjustment is not necessary if the light sensor is connected to the drum scanner via an interface circuit, which derives brightness and / or color correction values for the drum scanner from the brightness and color temperature measured by the light sensor.
  • the film forming device 2 needs not be directly connected to the drum scanner 1, but can also be connected to this 1 via a data output device which serves for the data output of control values on any storage medium, in which case the film generating device 2 is connected to a data reading device for the person concerned Data storage medium is connected.
  • a data output device which serves for the data output of control values on any storage medium
  • the film generating device 2 is connected to a data reading device for the person concerned Data storage medium is connected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Image Communication Systems (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Projection-Type Copiers In General (AREA)

Abstract

Un dispositif pour la fabrication d'un film d'impression ou d'un film de sélection des couleurs comporte un scanner à tambour (1) servant au balayage d'un original (8) pour la production d'une information d'image numérique pouvant être combinée avec une valeur de correction, ainsi qu'un dispositif de production de film pour la production du film d'impression et/ou film de sélection des couleurs sur la base de l'information d'image numérique corrigée. En vue de la détermination simplifiée de la valeur de correction est prévu un dispositif de saisie de valeur de correction (7) comportant une tête mélangeuse de couleurs (9), un dispositif vidéo (11) et un moniteur (12). Suivant le réglage de la tête mélangeuse de couleurs, on obtient les valeurs de correction.
PCT/EP1990/000703 1989-10-23 1990-05-02 Dispositif pour la fabrication d'un film d'impression ou d'un film de selection des couleurs au moyen d'un scanner a tambour WO1991006173A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893935236 DE3935236C1 (fr) 1989-10-23 1989-10-23
DEP3935236.6 1989-10-23

Publications (1)

Publication Number Publication Date
WO1991006173A1 true WO1991006173A1 (fr) 1991-05-02

Family

ID=6392004

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1990/000703 WO1991006173A1 (fr) 1989-10-23 1990-05-02 Dispositif pour la fabrication d'un film d'impression ou d'un film de selection des couleurs au moyen d'un scanner a tambour

Country Status (2)

Country Link
DE (1) DE3935236C1 (fr)
WO (1) WO1991006173A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0777378A2 (fr) * 1992-11-25 1997-06-04 Canon Information Systems, Inc. Procédé et appareil pour le réglage de la température de couleur correlée

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2056814A (en) * 1979-05-29 1981-03-18 Dainippon Screen Mfg A setup condition recorder for a color scanner
EP0178047A1 (fr) * 1984-09-03 1986-04-16 Crosfield Electronics Limited Génération de données d'impression en couleurs
US4719506A (en) * 1983-09-30 1988-01-12 Buren Keith E Van Method for predictably determining halftone dot sizes when altering color in a color separation process prior to scanning
US4736244A (en) * 1984-12-12 1988-04-05 Fuji Photo Film Co., Ltd. Color film inspection system and data output method therefor
DE3824096A1 (de) * 1987-07-15 1989-01-26 Fuji Photo Film Co Ltd Photodrucker

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6435541A (en) * 1987-07-31 1989-02-06 Fuji Photo Film Co Ltd Photographic printer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2056814A (en) * 1979-05-29 1981-03-18 Dainippon Screen Mfg A setup condition recorder for a color scanner
US4719506A (en) * 1983-09-30 1988-01-12 Buren Keith E Van Method for predictably determining halftone dot sizes when altering color in a color separation process prior to scanning
EP0178047A1 (fr) * 1984-09-03 1986-04-16 Crosfield Electronics Limited Génération de données d'impression en couleurs
US4736244A (en) * 1984-12-12 1988-04-05 Fuji Photo Film Co., Ltd. Color film inspection system and data output method therefor
DE3824096A1 (de) * 1987-07-15 1989-01-26 Fuji Photo Film Co Ltd Photodrucker

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0777378A2 (fr) * 1992-11-25 1997-06-04 Canon Information Systems, Inc. Procédé et appareil pour le réglage de la température de couleur correlée
EP0599495B1 (fr) * 1992-11-25 1998-06-24 Canon Information Systems, Inc. Procédé et appareil de réglage de température de couleur correlée
US5831686A (en) * 1992-11-25 1998-11-03 Canon Information Systems, Inc. Method and apparatus for adjusting correlated color temperature
US6078732A (en) * 1992-11-25 2000-06-20 Canon Information Systems, Inc. Method and apparatus for adjusting correlated color temperature
EP0777378B1 (fr) * 1992-11-25 2003-07-23 Canon Kabushiki Kaisha Procédé et appareil pour le réglage de la température de couleur correlée

Also Published As

Publication number Publication date
DE3935236C1 (fr) 1990-09-13

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