EP0676285B1 - Gestion des couleurs dans une machine rotative offset pour feuilles - Google Patents
Gestion des couleurs dans une machine rotative offset pour feuilles Download PDFInfo
- Publication number
- EP0676285B1 EP0676285B1 EP95810055A EP95810055A EP0676285B1 EP 0676285 B1 EP0676285 B1 EP 0676285B1 EP 95810055 A EP95810055 A EP 95810055A EP 95810055 A EP95810055 A EP 95810055A EP 0676285 B1 EP0676285 B1 EP 0676285B1
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- European Patent Office
- Prior art keywords
- colour
- fields
- color
- variation
- tone
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- 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
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- 238000007645 offset printing Methods 0.000 title abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 58
- 239000003086 colorant Substances 0.000 claims abstract description 39
- 238000007639 printing Methods 0.000 claims description 52
- 238000005259 measurement Methods 0.000 claims description 35
- 239000013598 vector Substances 0.000 claims description 35
- 230000009466 transformation Effects 0.000 claims description 26
- 230000008859 change Effects 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 230000009897 systematic effect Effects 0.000 claims description 11
- 238000000326 densiometry Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 5
- 230000002301 combined effect Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 10
- 239000000976 ink Substances 0.000 description 46
- 239000000047 product Substances 0.000 description 32
- 239000007787 solid Substances 0.000 description 30
- 239000011159 matrix material Substances 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 238000012937 correction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000004040 coloring Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000001739 density measurement Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000000844 transformation Methods 0.000 description 2
- 241001136792 Alle Species 0.000 description 1
- 241001295925 Gegenes Species 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 210000002023 somite Anatomy 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0036—Devices for scanning or checking the printed matter for quality control
- B41F33/0045—Devices for scanning or checking the printed matter for quality control for automatically regulating the ink supply
Definitions
- color management is that color templates in digital prepress are defined independently of output devices and materials. The colors are therefore described in a colorimetric coordinate system standardized by the Commission Internationale de l'Eclairage (CIE), such as XYZ, CIELAB or CIELUV. If multicolored images of this type are output on paper using a system calibrated in terms of color management, this ensures that the color appearance of the output is always the same, regardless of the output process used.
- CIE Commission Internationale de l'Eclairage
- EP 0 196 431 B1 describes a method and a device for achieving a uniform printing result on a multi-color offset printing machine that works in an autotypical manner.
- This solution is characterized by the measurement of ink layer thicknesses (solid ink densities) and halftone dot sizes (area coverage) at measuring fields, which are also printed for each printing ink in each inking zone of the press.
- the ink guide actuators on the printing press are set automatically on the basis of these densitometric measured values.
- EP 0 196 431 B1 has a further disadvantageous property in that features which have no direct relation to the color appearance of the printed product are measured with the solid and screen density of the individual colors.
- This deficiency can be countered by the fact that so-called combination measuring fields, i.e. Measuring fields in which the primary colors involved in the printing are printed on one another in a raster tone, provided and measured colorimetrically.
- Colorimetric measurement values obtained in this way can refer to the XYZ color space, which is based on the sensitivity function of the average human eye, or to the color spaces CIELUV or CIELAB derived from the XYZ system, all of which have been standardized by the CIE (Commission Internationale de l'Eclairage) .
- the colorimetric measurement on combination measuring fields has the advantage that it enables a statement about the interaction of all colors involved in a multicolor printing.
- the colorimetric measurement values directly say something about how the combination measuring field or the printed product appears in color to the human viewer.
- Another advantage is that the combination measuring fields can be replaced by image locations with a suitable image structure, if necessary.
- the disadvantage of colorimetric measurement methods is that they do not provide direct information about the process control. A deviation in the color location, for example, does not allow any conclusions to be drawn about how the ink guide on the printing press has to be corrected in order to reduce the deviation.
- EP 0 321 402 A1 and EP 0 408 507 A1 describe linear transformations for converting variations in full tone or screen density into variations in the color location of combination measuring fields in the CIELUV or CIELAB color spaces.
- the object of the invention is to provide measuring fields for recording color data of a printed product which are suitable for color management in web offset production and whose use in color management in particular enables a method which satisfies individual, several and preferably all of the requirements set out above .
- the method and the measuring fields developed for this purpose, or the measuring field group or arrangement, should also be usable in newspaper offset print runs.
- measuring fields and / or image points serving as measuring fields are also printed and optically scanned after printing.
- the returned light is evaluated.
- the printed product to be checked and a number of calibration prints produced with specifically different ink layer thicknesses each have a first combination measuring field, in which the basic colors, usually the three colors cyan, magenta and yellow, are overprinted with the nominal area coverage (F c1 , F m1 , F g1 ) are.
- at least one other primary color is varied, for example the first primary color by the value ⁇ F c2 in the second, the second primary color by the value ⁇ F m3 in the third and the third primary color by the value ⁇ F g4 in the fourth field.
- the number of additional combination measuring fields and the number of colors per combination measuring field preferably corresponds to the number of basic colors.
- the calibration prints additionally have at least one individual color grid in the basic colors for each basic color, which in its respective color has an area coverage that corresponds to that of the same color in the first combination measuring field. They preferably additionally have at least one different individual color grid for each primary color. The area coverage of the other single-color grid corresponds to the varied area coverage of the corresponding additional combination measurement area.
- the individual color grid fields in the preferred embodiment thus have the areas of coverage F c1 , F c2 , F m1 , F m3 , F g1 and F g4 .
- the calibration prints additionally contain at least one each Single-color full-tone field per basic color; preferably exactly one per basic color.
- the calibration print or prints can be printed separately or also in the printed product.
- the measuring fields form a measuring field group, which is preferably arranged in the form of a measuring field block.
- the color locus vectors R 1 , R 2 , R 3 and R 4 can be determined in a selected colorimetric coordinate system on these calibration prints by measurement with a color measuring device on the combination measuring fields.
- the effective area coverage in the pressure F ec1 , F ec2 , F em1 , F em3 , F eg1 , F eg4 and likewise in the single color full tone fields by densitometric measurement with a filter characteristic corresponding to the individual field can also be determined by densitometric or other measurements Vc1 , D Vm1 , D Vg1 can be determined.
- the color locus vectors, the solid color densities and the effective area coverage of the calibration prints are used according to the invention to determine two transformation functions A and B, which are a variation ⁇ D V1 of the solid color in the individual color solid tone fields caused by a change in the color layer thicknesses or a variation ⁇ F e1 of the effective area coverage in the individual areas Convert single color grid fields with the nominal area coverage F c1 , F m1 and F g1 into variations of the color locus vector of the first combination measuring field with the nominal area coverage (F c1 , F m1 , F g1 ).
- the color locus vector in the selected coordinate system is repeatedly determined on the printed product to be checked by measurement with a color measuring device on the first combination measuring field, and for that one predefined target color locus vector-related deviation of the color locus vector ⁇ R 11 determined on the printed product, a combination of a variation ⁇ D V11 of the solid color in existing or imagined single color solid color fields caused by changing the ink layer thicknesses and a variation ⁇ F e11 of the effective area coverage in existing or imaginary single color grid area fields with the nominal nominal area independent of this calculated.
- the deviation ⁇ R 11 of the color locus vector corresponds exactly to the combined effect of the variations ⁇ D V11 and ⁇ F e11 via the transformation functions A and B.
- the invention is further characterized in that the deviation of the color locus vector ⁇ R 11 on the printed product is corrected in the sense that on the one hand the calculated variation ⁇ D V11 of the solid ink densities by adjusting the ink guide actuators on the printing press and on the other hand the calculated variation ⁇ F e11 of the effective area coverage a change in the area coverage when the color separations are made to disappear; further in that the
- ⁇ R 11 ⁇ A ⁇ ⁇ ⁇ D V11 ⁇ + B ⁇ ⁇ ⁇ F e11 ⁇ applies.
- ⁇ R 11 ⁇ A ⁇ ⁇ ⁇ D V11 ⁇ + B ⁇ ⁇ ⁇ F e11 ⁇ applies where A ⁇ D V11 corresponds to the random part of ⁇ R 11 and B ⁇ F e11 represents the systematic part of ⁇ R 11 , ie constant part of ⁇ R 11 over several successive print jobs.
- a variation ⁇ F e11 of the effective area coverage in existing or imagined individual color grid fields with the nominal area coverage degrees F c1 , F m1 , and F g1 is calculated, independent of changes in the ink layer thicknesses , wherein the variation ⁇ R 11 corresponds exactly to the effect of the variation ⁇ F e11 via the transformation function B alone and that the deviation of the color location vector ⁇ R 11 on the printed product is corrected in the sense that the calculated variation ⁇ F e11 of the effective area coverage is compensated for as a result of a change in the area coverage independent of variations in the ink layer thickness when producing the color separations.
- the invention can be used with advantage in web offset printing.
- a measuring field group for recording color data of a printed product in particular for color management in web offset production printing, has a plurality of measuring fields, which can be optically scanned on a printed product to be checked or on Calibration print are printed.
- this measurement field group includes a first combination measurement field in which the basic colors with their nominal area coverage are printed one on top of the other, additional combination measurement fields in which the basic colors are printed with different nominal area coverage, each basic color being varied at least once in every additional combination measurement field, Furthermore, additional single-color grids in the primary colors, the first single-color grids in their respective primary colors having an area coverage that corresponds to that of the same color in the first combination measurement area.
- second individual color grid fields are provided, which have an area coverage in their respective primary color that corresponds to the varied area coverage of the same color in the additional combination measurement areas and finally additionally at least one individual color solid field for each primary color.
- the printed product 30 to be checked and optimized in the edition contains at least the combination measuring field 1 of the measuring fields described, in which the basic colors cyan, magenta and yellow with the nominal area coverage (F c1 , F m1 , F g1 ) are overprinted .
- an image point with an identical image structure can also serve as a combination measuring field.
- the calibration print 20 is used in particular with regard to the color material, the color layer thickness and the dot gain, i.e. the enlargement of the area coverage from the film template or the printing plate to the print, printed under standardized conditions. These conditions were set for the print run, for example by UGRA in Switzerland or FOGRA in Germany. It does not matter for the principle of operation whether the method according to the invention is used in newspaper or commercial web offset. The only essential is the requirement that the calibration print 20 according to the same standard as the edition, i.e. the printed product to be checked and optimized is produced.
- Further calibration prints 21, 22 and 23 also contain a measuring field block.
- the measuring field blocks of the calibration prints 20 to 23 are identical.
- the calibration prints 21, 22 and 23 are produced in a way that deviates from the applicable printing standard in that the color layer thickness of exactly one of the basic colors cyan, magenta and yellow is varied for each calibration print compared to the calibration print 20.
- the color layer thickness differs from cyan, that of magenta on the calibration print and that of yellow on the calibration print 23. In principle, the deviations can go in the positive or negative direction.
- the calibration prints 20 to 23 must also have other areas printed with all primary colors, so that sufficient color acceptance is guaranteed at the location of the measuring field block in the paper running direction. The design of these areas is free. Analogous considerations apply with regard to the ink acceptance for the printed product 30.
- the influence of the ink layer thickness is expressed in the differences between colorimetric and densitometric measurement values between the different calibration prints.
- the influence of the variations in the degree of surface coverage, which are independent of changes in the ink layer thicknesses, however, is noticeable in the differences in the measured values between the different measuring fields on one and the same calibration print.
- the transformation functions A and B are non-linear. Since we usually deal with relatively small variations around a standardized operating point in printing practice, it is permissible to linearize the relationships. In the interest of clarity, the method according to the invention is explained below using a linearized model. This does the generalizing wording in the claims to linear and non-linear systems does not break.
- the matrix B is calculated on the basis of the matrices ⁇ R Fe and ⁇ F e .
- ⁇ R Fe and ⁇ F e are defined by measured values that originate from calibration pressure 20 alone. This means that the matrix B can be determined completely on the basis of a single calibration pressure. In an extension of the method, it would be possible to determine a separate matrix B for several calibration prints and then to average the B over all B's . This measure could reduce the influence of random measurement errors.
- the transformation functions obtained from the calibration prints can now be used to advantage if the quality of production prints is to be monitored and optimized.
- the prerequisite for this is that the combination measuring field 1 is also printed in the printed product with the same nominal area coverage for cyan, magenta and yellow.
- the color locus vector R 11 in the combination measuring field 1 is measured on samples of the printed product 30 taken by sampling by measurement with a color measuring device.
- the target color locus vector can either be a measurement value originating from a given template or come directly from the digital prepress.
- ⁇ R 11M If one follows ⁇ R 11 over a longer period of time, ie over several productions, and forms the mean value ⁇ R 11M , in most cases ⁇ R 11M will differ from zero.
- ⁇ R 11M In conventional processes for controlling the color in offset printing, ⁇ R 11M would now be compensated for in every edition by adjusting the ink guide actuators on the printing press. If we now adopt the basic idea of color management in offset printing, we do not compensate for the systematic color locus deviation ⁇ R 11M by setting the printing press but by producing the color separations in the prepress stage by specifically influencing the area coverage.
- the method according to the invention makes it possible to use an image location with a suitable image structure instead of the combination measuring field 1 on the printed product 30.
- the space occupied by the combination measuring field 1 on the printed product can thereby be saved.
- the measurement data is collected with.
- densitometric values are determined using a densitometer, a spectrophotometer, a video camera or any other suitable device.
- colorimetric measurements with spectrophotometers, three-range color measuring devices, video cameras or other suitable devices are possible without breaking the invention.
- tools are used to further process the measurement data.
- the method according to the invention can also be extended in the direction of four-color overprinting, in that a proportion of the printing ink black is also permitted in the combination measuring fields on the calibration prints 20 to 23 and the printed product 30.
- the only condition is that the nominal area coverage of black is the same in all four combination measuring fields.
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- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Spectrometry And Color Measurement (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Control Of Velocity Or Acceleration (AREA)
- Printing Methods (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Rotary Presses (AREA)
- Coloring (AREA)
- Fixing For Electrophotography (AREA)
Claims (17)
- Groupe de champs de mesure pour appréhender des données couleur d'un produit d'impression, en particulier pour la gestion des couleurs dans une machine rotative offset pour feuilles comportant plusieurs champs de mesure, pouvant être explorés optiquement, sur un produit d'impression à contrôler ou bien imprimés sur une impression d'étalonnage,
caractérisé para) un premier champ de mesure de combinaison (1) dans lequel les couleurs de base sont imprimées les unes au-dessus des autres avec leurs degrés de couverture de surface nominaux (Fc1, Fm1, Fg1),b) des champs de mesure de combinaison additionnels (2, 3, 4) dans lequel les couleurs de base sont imprimées les unes au-dessus des autres avec des degrés de couverture de surface nominaux {(c) à titre additionnel au moins un champ de tons plein de couleurs individuelles (5, 6, 7) pour chaque couleur de base, etd) à titre additionnel au moins un champ de trames de couleurs individuelles (8, 11; 9, 12; 10, 13) pour chaque couleur de base, des premiers champs de couleurs de trame individuelles (8, 9, 10) ayant, dans leur couleur de base respective, un degré de couverture de surface (Fc1, Fm1, Fg1) qui correspond à celui de la même couleur dans le premier champ de mesure de combinaison (1) et/ou des deuxièmes champs de couleurs de trame individuelles (11, 12, 13) ayant dans leur couleur de base respective un degré de couverture de surface (Fc2, Fm3, Fg4) qui correspond au degré de couverture de surface ayant été modifié, de la même couleur dans les champs de mesure de combinaison additionnels (2, 3, 4). - Procédé de gestion des couleurs dans une machine rotative offset pour feuilles, dans lequela) des champs de mesure et/ou des emplacements image servant de champs de mesure sont imprimés conjointement, etb) sont explorés optiquement après le processus d'impression, etc) une évaluation de la lumière ré-émise étant effectuée,
caractérisé en ce qu'd) on utilise un groupe de champs de mesure selon la revendication 1. - Procédé de gestion des couleurs dans une machine rotative offset pour feuilles, dans lequela) des champs de mesure et/ou des emplacements image servant de champs de mesure sont imprimés conjointement, etb) sont explorés optiquement après le processus d'impression, etc) une évaluation de la lumière ré-émise étant effectuée,
caractérisé en ce qued) le produit d'impression (30) à contrôler et plusieurs impressions d'étalonnage (20, 21, 22, 23) fabriquées avec des épaisseurs de couches d'encre choisies à des valeurs différentes à dessein contenant chacune un premier champ de mesure de combinaison (1) dans lequel se trouvent les couleurs de base, en particulier les trois couleurs que sont cyan, magenta et jaune, sont imprimées les unes au-dessus des autres avec leurs degrés de couverture de surface nominaux Fc1, Fm1, Fg1,e) les impressions d'étalonnage (20, 21, 22, 23) présentant des champs de mesure de combinaison additionnels (2, 3, 4), dans lesquels les couleurs de base ayant des degrés de couverture de surface nominaux (f) les impressions d'étalonnage (20, 21, 22, 23) présentant en plus par couleur de base au moins un champ de tons pleins de couleurs individuelles (5, 6, 7), etg) les impressions d'étalonnage (20, 21, 22, 23) présentant en plus par couleur de base au moins un champ de trames de couleurs individuelles (8, 11; 9, 12; 10, 13), des premiers champs de couleurs de trame individuelles ayant dans leur couleur de base respective un degré de couverture de surface (Fc1, Fm1, Fg1) qui correspond à celui de la même couleur dans le premier champ de mesure de combinaison (1) et/ou des deuxièmes champs de couleurs de trame individuelles (11, 12, 13) ayant dans leur couleur de base respective un degré de couverture de surface (Fc2, Fm3, Fg4) qui correspond au degré de couverture de surface, ayant été modifié, de la même couleur dans les champs de mesure de combinaison additionnels (2, 3, 4). - Procédé selon la revendication 3, caractérisé en ce que, sur les impressions d'étalonnage (20, 21, 22, 23)a) on détermine par mesure avec un appareil de mesure colorimétrique sur les champs de mesure de combinaison (1, 2, 3, 4) respectivement les vecteurs d'emplacements des couleurs (R 1, R 2, R 3 et R 4) dans un système de coordonnées colorimétrique sélectionné,b) dans les champs de tons pleins des couleurs individuelles, on détermine par une mesure densimétrique à l'aide d'une caractéristique de filtrage correspondant au champ individuel les valeurs de densités de tons pleins DVc1, DVm1, DVg1, etc) dans les champs de trames de couleurs individuelles (8, 11; 9, 12; 10, 13), on détermine par des mesures densimétriques ou par d'autres mesures les degrés de couverture de surface effectifs dans l'impression Fec1, Fec2, Fem1, Fem3, Feg1, Feg4.
- Procédé selon la revendication 4, caractérisé en ce que les vecteurs d'emplacements des couleurs (R 1, R 2, R 3 et R 4), les densités de tons pleins (DVc1, DVm1, DVg1) et les degrés de couverture de surface effectifs (Fec1, Fec2, Fem1,Fem3, Feg1, Feg4) des impressions d'étalonnage (20, 21, 22, 23) sont utilisés pour la détermination de deux fonctions de transformation A et B qui servent à effectuer la conversion par calcul, d'une variation
- Procédé selon la revendication 5, caractérisé en ce quea) sur le produit d'impression (30) à contrôler, en effectuant une mesure à l'aide d'un appareil colorimétrique sur le premier champ de mesure de combinaison (1), on détermine répétitivement le vecteur d'emplacement de couleur R 11 dans le système de coordonnées sélectionné, etb) pour l'écart lié à un vecteur d'emplacement de couleur de consigne R 0 prédéterminé, écart concernant le vecteur d'emplacement de couleur
- Procédé selon la revendication 6, caractérisé en ce que la variation ΔR 11 correspond précisément à l'effet combiné des variations ΔD V11 et ΔF e11 par l'intermédiaire des fonctions de transformation A et B.
- Procédé selon la revendication 6 ou 7, caractérisé en ce que
l'écart du vecteur d'emplacement de couleur ΔR 11 sur le produit d'impression est corrigé dans le sens où, d'une part, la variation ΔD V11 calculée des densités de tons pleins est mise en annulation par réglage des organes de réglage de régulation de couleurs sur la machine d'impression et, d'autre part, la variation ΔF e11 calculée des degrés de couverture de surface efficaces est mise en annulation par une modification des degrés de couverture de surface au stade de la réalisation des sélections polychromes. - Procédé selon la revendication 9, caractérisé en ce que, pour un écart
ΔR 11 du vecteur d'emplacement de couleur déterminé sur le produit d'impression, est calculée une combinaison d'une variation ΔD v11 conditionnée par une modification des densités de couches d'encre, concernant les densités de tons pleins et une variation ΔF e11 , indépendante de cela, des degrés de couverture de surface, de manière que l'on ait simultanément - Procédé selon l'une des revendications 3 à 8, caractérisé en ce que
pour un écart ΔR 11 du vecteur d'emplacement de couleur déterminé sur le produit d'impression est calculée une variation ΔD V11, conditionnée par la modification des densités d'épaisseurs d'encre, des densités de tons pleins, la variation ΔR 11 correspondant exactement à l'effet de la variation ΔD V11 par l'intermédiaire de la fonction de transformation A, et en ce que
l'écart du vecteur d'emplacement de couleur ΔR 11 sur le produit d'impression est corrigé dans le sens où la variation ΔD V11 calculée des densités de tons pleins est mise en annulation par réglage des organes de réglage de la régulation de l'encre sur la machine d'impression. - Procédé selon l'une des revendications 3 à 8, caractérisé en ce que,
pour un écart ΔR 11 du vecteur d'emplacement de couleur déterminé sur le produit d'impression, est calculée une variation ΔF e11, indépendante des modifications des épaisseurs de couche d'encre, des degrés de couverture de surface effectifs dans des champ de trames de couleurs individuelles existants ou imaginaires, avec les degrés de couverture de surface nominaux (Fc1, Fm1, Fg1), la variation ΔR 11 correspondant exactement à l'effet de la variation ΔF e11 par l'intermédiaire de la fonction de transformation B seule et en ce que
l'écart du vecteur d'emplacement de couleur ΔR 11 sur le produit d'impression est corrigé dans le sens où la variation ΔF e11 calculée des degrés de couverture de surface effectifs, suite à une variation indépendante des modifications des degrés de couverture de surface lors de la réalisation des sélections polychromes est compensée. - Procédé selon l'une des revendications 3 à 12, caractérisé en ce que le champs de mesure de combinaison situé sur le produit d'impression est un point image.
- Procédé selon l'une des revendications 3 à 13, caractérisé en ce que les champs de mesure de combinaison que l'on a sur les impressions d'étalonnage et sur le produit d'impression sont imprimés, en plus des couleurs cyan, magenta et jaune, également avec un ton de trame qui est en noir, le degré de couverture de surface nominal du noir étant le même dans tous les champs de mesure de combinaison.
- Procédé selon l'une des revendications 3 à 14, caractérisé en ce que les mesures colorimétriques et/ou densimétriques sont effectuées avec un spectrophotomètre.
- Procédé selon l'une des revendications 3 à 14, caractérisé en ce que les mesures densimétriques sont effectuées avec un densitomètre.
- Procédé selon l'une des revendications 3 à 14, caractérisé en ce que les mesures colorimétriques sont effectuées avec un appareil de mesure des couleurs à trois plages.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4402828 | 1994-01-31 | ||
DE4402828A DE4402828C2 (de) | 1994-01-31 | 1994-01-31 | Messfeldgruppe und Verfahren zur Qualitätsdatenerfassung unter Verwendung der Messfeldgruppe |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0676285A1 EP0676285A1 (fr) | 1995-10-11 |
EP0676285B1 true EP0676285B1 (fr) | 1997-11-12 |
EP0676285B2 EP0676285B2 (fr) | 2001-11-14 |
Family
ID=6509083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95810055A Expired - Lifetime EP0676285B2 (fr) | 1994-01-31 | 1995-01-30 | Gestion des couleurs dans une machine rotative offset pour feuilles |
Country Status (7)
Country | Link |
---|---|
US (1) | US5761327A (fr) |
EP (1) | EP0676285B2 (fr) |
AT (1) | ATE160110T1 (fr) |
DE (2) | DE4402828C2 (fr) |
DK (1) | DK0676285T4 (fr) |
ES (1) | ES2112031T5 (fr) |
FI (1) | FI110175B (fr) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5978506A (en) * | 1995-12-28 | 1999-11-02 | Ricoh & Company, Ltd. | Colorant-independent color balancing methods and systems |
DE19639014C2 (de) * | 1996-09-23 | 1998-12-03 | Wifag Maschf | Messfeldgruppe und Verfahren zur Erfassung von optisch drucktechnischen Größen im Mehrfarben-Auflagendruck |
DE19738923A1 (de) * | 1997-09-05 | 1999-03-11 | Wifag Maschf | Messfeldblock und Verfahren zur Erfassung von Qualitätsdaten im Mehrfarben-Auflagendruck |
DE19638967C2 (de) * | 1996-09-23 | 1998-12-17 | Empa | Messfeldgruppe und Verfahren zur Erfassung von optisch drucktechnischen Größen im Mehrfarben-Auflagendruck |
DK0836941T3 (da) | 1996-09-23 | 2001-10-22 | Wifag Maschf | Målefeltgruppe og en fremgangsmåde til opsamling af kvalitetsdata ved flerfarve-opslagstryk |
US6038374A (en) * | 1997-06-04 | 2000-03-14 | Hewlett-Packard Company | System and method for constructing calibrated color tables in color image reproduction systems using stochastic supersampling |
DE19738992A1 (de) * | 1997-09-05 | 1999-03-11 | Empa | Messfeldblock und Verfahren zur Erfassung von Qualidätsdaten im Mehrfarben-Auflagendruck |
DE19844495B4 (de) | 1998-09-29 | 2005-04-07 | Man Roland Druckmaschinen Ag | Verfahren zur Farbkalibrierung mittels Colormanagement für eine digital ansteuerbare Druckmaschine mit einer wiederbeschreibbaren Druckform |
JP3781941B2 (ja) * | 2000-03-13 | 2006-06-07 | 大日本スクリーン製造株式会社 | 印刷装置 |
CA2439819A1 (fr) * | 2001-03-02 | 2002-09-12 | The Ackley Martinez Company Dba Mgi Studio | Systeme et procede d'ajustement d'impression |
MXPA04000987A (es) | 2001-07-30 | 2005-02-17 | Ackley Martinez Company Dba Mg | Sistema y metodo de un sistema de compensacion de mezclado. |
CA2452539A1 (fr) * | 2001-07-30 | 2003-02-13 | The Ackley Martinez Company Dba Mgi Studio | Procede et systeme de traitement de gestion de couleurs |
US7605959B2 (en) | 2005-01-05 | 2009-10-20 | The Ackley Martinez Company | System and method of color image transformation |
KR100679052B1 (ko) * | 2006-01-04 | 2007-02-06 | 삼성전자주식회사 | 최적 선호색 편집 장치 및 방법 |
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NL7902713A (nl) * | 1979-04-06 | 1980-10-08 | Nl Omroep Stichting | Kleurstelsel. |
US4310248A (en) * | 1980-04-24 | 1982-01-12 | Meredith Nolan J | Color control system |
DE3127381A1 (de) * | 1981-07-10 | 1983-01-27 | Salvat Editores, S.A., Barcelona | Messorgane fuer im geschlossenen kreis arbeitende systeme zur ueberwachung und korrektur des drucks bei offset-druckmaschinen |
US4706206A (en) * | 1983-09-20 | 1987-11-10 | Kollmorgen Technologies Corporation | Color printing control using halftone control areas |
DE3468650D1 (en) * | 1983-11-04 | 1988-02-18 | Gretag Ag | Method and device for rating the printing quality and/or controlling the ink supply in an offset printing machine, and offset printing machine with such a device |
EP0196431B1 (fr) * | 1985-03-21 | 1992-11-11 | Felix Brunner | Procédé, dispositif de réglage et moyens auxiliaires pour l'obtention d'un résultat d'impression uniforme au moyen d'une machine d'impression offset polychrome fonctionnant suivant le procédé de similigravure |
US5182721A (en) † | 1985-12-10 | 1993-01-26 | Heidelberger Druckmaschinen Aktiengesellschaft | Process and apparatus for controlling the inking process in a printing machine |
DE3600200A1 (de) * | 1986-01-07 | 1987-10-22 | Michael M Micklei | Farbtabelle zur reproduzierbaren bestimmung von farben |
DE3626423A1 (de) * | 1986-08-05 | 1988-02-11 | Deutsche Forsch Druck Reprod | Verfahren und vorrichtung zur beeinflussung der farblichen erscheinung einer farbflaeche bei einem druckvorgang |
DE3643721A1 (de) * | 1986-12-20 | 1988-06-30 | Heidelberger Druckmasch Ag | Druckkontrollstreifen |
US4967379A (en) * | 1987-12-16 | 1990-10-30 | Gretag Aktiengesellschaft | Process for the ink control or regulation of a printing machine by comparing desired color to obtainable color data |
DE58901780D1 (de) * | 1988-01-14 | 1992-08-13 | Gretag Ag | Verfahren und vorrichtung zur farbregelung einer druckmaschine. |
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EP0408507B1 (fr) * | 1989-07-14 | 1993-11-10 | GRETAG Aktiengesellschaft | Méthode de détermination des écarts de couleur entre deux surfaces tramées imprimées avec une machine d'impression ainsi que méthode de commande ou réglage de l'impression couleurs d'une machine à imprimer |
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DE9017770U1 (de) * | 1990-07-06 | 1991-12-12 | Krzyminski, Harald, Dr., 6240 Königstein | Kalibrationskarte |
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US5317425A (en) * | 1992-02-10 | 1994-05-31 | Eastman Kodak Company | Technique for use in conjunction with an imaging system for providing an appearance match between two images and for calibrating the system thereto |
-
1994
- 1994-01-31 DE DE4402828A patent/DE4402828C2/de not_active Expired - Fee Related
-
1995
- 1995-01-30 US US08/380,360 patent/US5761327A/en not_active Expired - Fee Related
- 1995-01-30 DE DE59500965T patent/DE59500965D1/de not_active Expired - Fee Related
- 1995-01-30 EP EP95810055A patent/EP0676285B2/fr not_active Expired - Lifetime
- 1995-01-30 FI FI950393A patent/FI110175B/fi not_active IP Right Cessation
- 1995-01-30 DK DK95810055T patent/DK0676285T4/da active
- 1995-01-30 ES ES95810055T patent/ES2112031T5/es not_active Expired - Lifetime
- 1995-01-30 AT AT95810055T patent/ATE160110T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DK0676285T4 (da) | 2002-02-18 |
DK0676285T3 (da) | 1998-07-27 |
FI950393A (fi) | 1995-08-01 |
FI110175B (fi) | 2002-12-13 |
US5761327A (en) | 1998-06-02 |
DE4402828A1 (de) | 1995-08-10 |
DE4402828C2 (de) | 2001-07-12 |
ES2112031T5 (es) | 2002-05-16 |
ES2112031T3 (es) | 1998-03-16 |
DE59500965D1 (de) | 1997-12-18 |
EP0676285A1 (fr) | 1995-10-11 |
ATE160110T1 (de) | 1997-11-15 |
EP0676285B2 (fr) | 2001-11-14 |
FI950393A0 (fi) | 1995-01-30 |
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