JP2004106523A - Method and device for texture color tone control of printing machine - Google Patents

Method and device for texture color tone control of printing machine Download PDF

Info

Publication number
JP2004106523A
JP2004106523A JP2003288582A JP2003288582A JP2004106523A JP 2004106523 A JP2004106523 A JP 2004106523A JP 2003288582 A JP2003288582 A JP 2003288582A JP 2003288582 A JP2003288582 A JP 2003288582A JP 2004106523 A JP2004106523 A JP 2004106523A
Authority
JP
Japan
Prior art keywords
color
target
halftone
density
halftone density
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.)
Granted
Application number
JP2003288582A
Other languages
Japanese (ja)
Other versions
JP2004106523A5 (en
JP3825427B2 (en
Inventor
Ikuo Ozaki
Shuichi Takemoto
尾崎 郁夫
竹本 衆一
Original Assignee
Mitsubishi Heavy Ind Ltd
三菱重工業株式会社
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
Priority to JP2002245587 priority Critical
Application filed by Mitsubishi Heavy Ind Ltd, 三菱重工業株式会社 filed Critical Mitsubishi Heavy Ind Ltd
Priority to JP2003288582A priority patent/JP3825427B2/en
Publication of JP2004106523A5 publication Critical patent/JP2004106523A5/ja
Publication of JP2004106523A publication Critical patent/JP2004106523A/en
Priority claimed from US11/295,496 external-priority patent/US7573613B2/en
Publication of JP3825427B2 publication Critical patent/JP3825427B2/en
Application granted granted Critical
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color tone control using an IRGB densitometer which costs lower than a spectrometer in texture color tone controlling of a printing machine. <P>SOLUTION: Set a target color mixers screen toner concentration for every ink supply unit width which is given when a printing texture is divided by ink supply unit width of ink suppliers 6 and 7, and meter a real color mixture screen toner concentration for every ink supply unit width of a final printing sheet obtained by printing using the IRGB densitometer 1. Convert each color mixture screen toner concentration into modulus of dot area, and convert it into monocolour screen toner concentration. Calculate an orthologous solid toner concentration deviation which corresponds with a deviation of target monocolour screen toner concentration and real monocolour screen toner concentration, and adjusts the amount ink supply in every ink supply unit width according to the orthologous solid toner concentration deviation by using a formula such as Yule-Nielsen. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a picture color tone control method and apparatus for a printing press, and more particularly to a picture color tone control method and apparatus for controlling color tone using an IRGB densitometer.

As a conventional method of controlling the color tone of a picture of a printing machine, a color patch for color tone inspection is printed in a blank portion of a print sheet together with the picture, and the spectral reflectance of the color patch is measured by a spectrometer. There is a method of detecting the deviation of the color tone of the picture from the target color tone from the measurement result and controlling the ink supply amount of each color. However, this method requires a margin for printing the color patches on the print sheet, and wastes paper by the margin.

To solve this problem, Patent Literature 1 and Patent Literature 2 propose a method of controlling the color tone of a picture itself without using a color patch. The methods disclosed in these documents are summarized as follows.
First, the spectral reflectance of a pattern printed by the printing unit of each color is measured by a spectrometer. Then, the spectral reflectance (average spectral reflectance of the entire key zone) is calculated for each key zone of the ink key, and the spectral reflectance of each key zone is calculated based on color coordinate values (L * a * b) proposed by the International Commission on Illumination. * ) After trial printing is performed by adjusting the ink supply amount of each color, when a print sheet having a desired color tone (hereinafter, referred to as an OK sheet) is obtained, the color coordinate value of each key zone of the OK sheet is set to the target color coordinate value. I do. Next, after the actual printing is started, the difference (color difference) between the color coordinate values of the OK sheet and the printing sheet (hereinafter, the printing sheet obtained by the actual printing is referred to as the final printing sheet) is calculated for each key zone, and the color difference is calculated. , The amount of increase or decrease of the opening of the ink key of each printing unit is calculated, and the opening of each ink key of each printing unit is adjusted by online control so that the color difference becomes zero.
JP 2001-18364 A JP 2001-47605 A

方法 However, the method disclosed in the above patent document has the following problems. First, in the above method, a spectrometer is used as a measuring means. However, the spectrometer is expensive, and the spectrometer moves a measurement target (printed sheet in this case) very quickly like a newspaper rotary press. If it does, it cannot follow the processing ability. Further, in the above-described method, since the color tone control is started after the OK sheet is printed, a large amount of waste paper occurs between the start and the printing of the OK sheet. Further, in the above method, since the pattern in the key zone of the ink key is averaged over the entire key zone and the color tone is controlled based on the average spectral reflectance, when the image ratio of the pattern in the key zone is low, The measurement error of the spectrometer increases, and the control tends to be unstable. In addition, when ordering from a customer, there is a case where particularly strict color tone management is required for a specific point of interest in a picture. Data such as CIP3 data (PPF (Print Production Format) data of CIP3 (Cooperation for Integration of Prepress, Press, Postpress) standard) must be obtained from the upstream plate making process.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its first object to provide a picture color tone control method for a printing press, in which color tone control can be performed using an IRGB densitometer which is lower in cost than a spectrometer. The purpose of.
It is a second object of the present invention to provide a method of controlling a picture color tone of a printing machine, which can perform color tone control immediately after starting printing before an OK sheet is obtained.

Further, according to the present invention, when performing color tone control of a pattern for each ink supply unit width, even if the image streak rate of the pattern within the ink supply unit width is low, the measurement error of the sensor is small and stable color tone control can be performed. A third object is to provide a method for controlling a picture color tone of a printing press as described above.
A fourth object of the present invention is to provide a picture color tone control method for a printing press, which does not require reference image data and can perform color tone control at a specific point of interest in a picture.

Further, according to the present invention, when image data serving as a reference (picture area ratio data such as CIP3 data) can be obtained, the picture color tone control of a printing press can be performed effectively to perform accurate color tone control. A fifth object is to provide a method.

In order to achieve the above object, in the picture color tone control method for a printing press of the present invention, first, a target color mixture halftone density for each ink supply unit width when a printed picture is divided by the ink supply unit width of the ink supply device is obtained. Set. The ink supply unit width of the ink supply device is a key width (key zone) of each ink key when the ink supply device is an ink key device, and is a digital width when the ink supply device is a digital pump device. It is the pump width of the pump. Note that there are various methods for setting the target color mixture halftone density as described later, and an appropriate method according to the situation is used.

(4) When printing is started and a final printing sheet is obtained, the actual mixed color halftone density of each ink supply unit width of the final printing sheet is measured using an IRGB densitometer. Then, an actual halftone dot area ratio of each ink color corresponding to the actual halftone dot density is determined based on a predetermined correspondence between the halftone dot area ratio of each ink color and the halftone dot density. As a method of obtaining the actual halftone dot area ratio from the actual halftone dot density, a database storing the relationship between the halftone dot percentage and the halftone dot density of each ink color, for example, newspaper printing JapanColor established by the ISO / TC130 National Committee. A reference printed matter may be printed, and a database actually measured by an IRGB densitometer may be used. More simply, a value approximated by a known Neugebauer equation using the database may be used. Further, based on the correspondence between the halftone dot area ratio and the halftone dot density, the target halftone dot ratio of each ink color corresponding to the target halftone dot density is also obtained. The target halftone dot area ratio does not need to be obtained every time as in the case of the actual halftone dot area ratio, but may be obtained once as long as the target color mixture halftone density does not change. For example, the target halftone dot area ratio may be obtained at the time when the target color mixture halftone density is set.

Next, based on the correspondence between the preset halftone dot area ratio and the monochrome halftone density, the actual single color halftone density corresponding to the actual halftone dot area ratio is determined. As a method of obtaining the actual single-color halftone density from the actual halftone dot area ratio, a map or a table representing the relationship between the single-color halftone density and the halftone dot area ratio is prepared, and the actual halftone dot area ratio is set in these maps and tables. What is necessary is just to apply. Further, based on the correspondence between the halftone dot area ratio and the monochrome halftone density, a target single color halftone density corresponding to the target halftone dot area ratio is also obtained. The target single-color halftone density does not need to be obtained every time as in the case of the actual single-color halftone density, and may be obtained once as long as the target halftone dot area ratio does not change. For example, the target single-color halftone density may be obtained when the target halftone dot area ratio is set.

Next, based on a correspondence relationship between a predetermined halftone dot area ratio, a single color halftone density, and a solid density, a solid color corresponding to a deviation between the target single color halftone density and the actual single color halftone density under the target halftone dot density is obtained. Find the density deviation. As a method of calculating the solid density deviation, a map or a table representing the above-mentioned body correspondence may be prepared, and the target halftone dot area ratio, the target single-color halftone density, and the actual single-color halftone density may be applied to these maps and tables. More simply, the above relationship may be approximated using a well-known Yule-Nielsen equation, and the relationship may be obtained using the approximation. Then, the ink supply amount is adjusted for each ink supply unit width based on the obtained solid density deviation, and the supply amount of each color ink is controlled for each ink supply unit width. The adjustment amount of the ink supply amount based on the solid density deviation can be easily obtained by using a well-known API (auto preset inking) function described in detail in an embodiment.

As described above, according to the picture color tone control method for a printing press of the present invention, since the color tone can be controlled using an IRGB densitometer instead of a spectrometer, the cost of the measuring means can be reduced and the newspaper rotary press can be used. It is possible to sufficiently cope with such a high-speed printing machine.
The above-described pattern color tone control method can be implemented by a pattern color tone control device having the following configuration. A picture color tone control device for a printing press according to the present invention includes an ink supply device that supplies ink to each area divided in a printing width direction, and an IRGB densitometer ( (Preferably a line sensor type IRGB densitometer), target mixed color halftone density setting means, mixed color halftone density measuring means, target halftone dot area ratio calculating means, real halftone dot area ratio calculating means, target single color halftone density calculating means, real single color Halftone density calculating means, solid density deviation calculating means, and ink supply amount adjusting means are provided as its constituent elements.

Among them, target mixed color halftone density setting means, mixed color halftone density measuring means, target halftone dot area ratio calculating means, actual halftone dot area ratio calculating means, target single color halftone density calculating means, real single color halftone density calculating means, solid density deviation calculation The means and the ink supply amount adjusting means can be realized as one function of a programmed computer. Each of these functions will be described. First, the target color mixture halftone density setting means has a function of setting the target color mixture halftone density for each ink supply unit width when the print pattern is divided by the ink supply unit width of the ink supply device. are doing. The color mixture halftone density measuring means has a function of measuring the actual color mixture halftone density for each ink supply unit width of the final printing sheet using an IRGB densitometer. The target halftone dot area ratio calculating means calculates a target halftone area of each ink color corresponding to the target halftone dot density based on a correspondence relationship (for example, Neugebauer formula) between the halftone dot area ratio of each ink color and the halftone halftone density. It has a function of calculating the dot area ratio, and the actual dot area ratio calculating means has a function of calculating the actual dot area ratio of each ink color corresponding to the actual mixed color halftone density based on the same correspondence. The target single-color halftone density calculating means has a function of obtaining a target single-color halftone density corresponding to the target halftone density based on a correspondence relationship between a predetermined halftone dot area ratio and a single-color halftone density. The means has a function of obtaining the actual monochrome halftone density corresponding to the actual halftone dot area ratio based on the same correspondence. The solid density deviation calculating means calculates the target single color halftone density under the target halftone dot area ratio based on the correspondence relationship (for example, the Yule-Nielsen equation) between the halftone dot area ratio, the monochrome halftone density and the solid density. It has a function of obtaining a solid density deviation corresponding to a deviation from the actual single color halftone density. The ink supply amount adjusting means has a function of adjusting the ink supply amount of the ink supply device for each ink supply unit width by, for example, an API function based on the solid density deviation. Preferably, a conversion table defining a correspondence relationship between a halftone dot area ratio, a mixed color halftone density, and a color coordinate value in the IRGB densitometer is provided, and the target halftone dot area ratio calculating means and the actual halftone dot area ratio calculating means include: The conversion table is used to determine the target dot area ratio or the actual dot area ratio.

As one method of setting the target color mixture halftone density, from the start of printing to the time when the OK sheet is obtained, the current printing is performed based on the correspondence relationship between the dot area ratio of each ink color and the color mixture halftone density. A mixed color halftone density corresponding to an image ratio for each ink supply unit width of each ink color in a picture is obtained, and a mixed color halftone density corresponding to the image ratio is set as a target mixed color halftone density. As a result, color tone control can be performed immediately after startup, and the time until an OK sheet is obtained can be reduced to reduce waste paper. The image ratio for each unit width of ink supply is measured using a film scanner or a plate scanner for a film manufactured in advance in the plate-making process, but the dot gain is used even if the print pattern has the same image ratio. Taking into account (thickness of the area of the halftone dot), the density to be measured varies depending on the density (50%, 80%, 80%, etc.) of the screen constituting the printed picture. When obtaining the corresponding halftone dot density, correction is performed in consideration of the dot gain according to the density of the halftone dot.

On the other hand, when an OK sheet that satisfies the print quality is obtained, in order to improve the color tone control performance of a low streak portion of a printed matter or a pattern position that is conspicuous to the human eye, the pixels constituting the pattern of the OK sheet are selected. It is preferable that a target pixel corresponding to each ink color is set for each ink supply unit width, and that the mixed color halftone density of the target pixel is set as the target mixed color halftone density. In this case, in the step of measuring the actual color mixture halftone density, the actual color mixture halftone density of the pixel of interest is measured. According to this, when there is no pixel area ratio data, it is impossible to estimate the solid density of a single color of a pixel, but this method makes it possible, and if there is information on the image ratio for each ink supply unit width, the pattern The color tone control can also be performed for a specific point of interest. Also, since the measured values are not averaged over the entire ink supply unit width, even if the image streak rate of the pattern within the ink supply unit width is low (for example, a pattern such as a one-point corporate color), the sensor (IRBG density) Measurement error) and stable color tone control can be performed. Note that the target pixel here may be a single pixel or a continuous block of a plurality of pixels. In the case of a plurality of pixels, the target color mixture halftone density and the actual color mixture halftone density are the target value or the measured value of the average color mixture halftone density of these pixels.

As described above, the color tone control method of the present invention can perform color tone control for each pixel of interest even when there is no reference image data. However, the kcmy halftone dot area of a picture to be printed is externally (for example, a print request source). When rate data (for example, image data for plate making, etc.) can be obtained, target pixels corresponding to each ink color are set for each ink supply unit width from among the pixels constituting the print target picture, and set in advance. The halftone dot area ratio of the pixel of interest is converted into a mixed color halftone density based on the corresponding relationship between the halftone dot area ratio and the mixed color halftone density. Then, the color mixture halftone density of the target pixel is set as the target color mixture halftone density, and the set actual color mixture halftone density of the target pixel is measured. According to this, color development can be estimated in pixel units, such as by using a database of JapanColor, so that it is not necessary to wait for the printing of an OK sheet, and it is possible to perform color tone control for a specific target point of a picture immediately after printing is started. it can. The kcmy halftone dot area ratio data may be bitmap data of a picture to be printed (for example, 1-bit Tiff plate making data) or data obtained by converting bitmap data into low-resolution data equivalent to CIP3 data. Good.

Furthermore, if the ICC (International Color Consortium) profile can be obtained in addition to the kcmy halftone dot area ratio data of the print target picture, it corresponds to each ink color for each ink supply unit width from the pixels constituting the print target picture. Each of the target pixels is set, and the dot area ratio of the target pixel is converted into a mixed color halftone density using the ICC profile and the device profile of the IRGB densitometer. Then, the color mixture halftone density of the target pixel is set as the target color mixture halftone density, and the set actual color mixture halftone density of the target pixel is measured. As described above, by controlling the color tone based on the ICC profile obtained from the print request source or the like, a printed material having a color tone desired by the print request source or the like can be easily obtained.

In order to convert the halftone dot area ratio of the target pixel into the halftone density of the mixed color, the halftone area ratio is temporarily converted into the color coordinate value using the ICC profile, and the color coordinate value is converted into the halftone density of the mixed color. However, since the color coordinate values are three-dimensional information and the color mixture halftone density is four-dimensional information, the color mixture halftone density corresponding to the color coordinate values is not uniquely determined. Therefore, the present invention provides a method of selecting the most appropriate four-dimensional information from among the myriad of candidate four-dimensional information in the development of such three-dimensional information into four-dimensional information. First, as a premise, the device profile of the IRGB densitometer is a conversion table that defines the correspondence between the halftone dot area ratio, the mixed color halftone density, and the color coordinate value in the IRGB densitometer. Then, the halftone dot area ratio of the target pixel is converted into a color coordinate value using the ICC profile, a plurality of color mixture halftone density candidates corresponding to the color coordinate value are obtained from the conversion table, and the conversion table is used to determine the color mixture halftone density candidate. The halftone dot area ratio is converted into color coordinate values. The color difference between the two color coordinate values obtained by the conversion using the ICC profile and the conversion using the conversion table is obtained, and the amount of change in the dot area ratio corresponding to the color difference is calculated using mathematical means such as minimum approximation. Then, a value obtained by adding the obtained amount of change to the halftone dot area ratio of the target pixel is defined as a virtual halftone dot area ratio, and among the plurality of mixed color halftone density candidates, the one corresponding to the virtual halftone dot area ratio with reference to the conversion table. Then, the selected mixed color halftone density candidate is set as the mixed color halftone density of the pixel of interest. As described above, according to the present method, the halftone density corresponding to the color coordinate value can be uniquely determined by using the dot area ratio corresponding to the color coordinate value.

More preferably, based on the correspondence between the color mixture halftone density and the color coordinate value set in advance, the actual color coordinate value corresponding to the actual color mixture halftone density of the target pixel measured by the IRGB densitometer and the target color mixture halftone density And the target color coordinate value to be obtained. Then, a color difference between the actual color coordinate value and the target color coordinate value is obtained, and the actual color coordinate value and / or the color difference are displayed on a display device. According to this, it is possible for the operator to intuitively understand at what level the colors match.

One method of setting a point of interest is to display an image of a print pattern on a display device such as a touch panel, and allow the operator to arbitrarily specify the point of interest. Preferably, a pixel having the highest density sensitivity for each ink color or a pixel having the highest autocorrelation with respect to the dot area ratio of each pixel for each ink color is automatically extracted and set as a target pixel. I do. According to this, more stable color tone control can be performed when the image streak rate of the color or the pattern of the product for which priority is given to the color tone within the ink supply unit width is low.

More preferably, a pixel group including a designated or automatically extracted pixel and a plurality of surrounding pixels is set as a target pixel. In this case, the average color mixture halftone density of the pixel group is set as the target color mixture halftone density, and the IRGB densitometer measures the actual average color mixture halftone density of the pixel group. The number of pixels to be included in the pixel group and the selection pattern thereof are determined so as to suppress the influence of disturbance in consideration of the position of the designated or automatically extracted pixel in the picture or the like. According to this, the fluctuation of the measurement data due to the meandering of the printing paper surface or the misalignment is reduced, so that stable feedback control can be performed.

According to the picture color tone control method and apparatus of the printing press of the present invention, color tone control can be performed using an IRGB densitometer instead of a spectrometer. It can respond to high-speed printing machines.
In particular, based on the correspondence between the halftone dot area ratio of each ink color and the halftone density of the mixed color, the halftone density of the mixed color corresponding to the streak rate of each ink supply unit width of the ink color in the current printed pattern is obtained. By setting the color mixture halftone density corresponding to the ratio as the target color mixture halftone density, color tone control can be performed immediately after startup, and the time until an OK sheet is obtained can be shortened to reduce waste paper.

Further, a target pixel corresponding to each ink color is set for each ink supply unit width from the pixels constituting the picture on the OK sheet, and the halftone density of the target color is set as the target halftone density. By measuring the actual color mixture halftone density of the pixel of interest on the final printing sheet, even when there is no reference image data, color tone control can be performed for a specific point of interest of the picture. In addition, since the measured values are not averaged over the entire width of the ink supply unit, stable color tone control can be performed even if the image ratio of the picture within the unit width of the ink supply is low.

If kcmy halftone dot area ratio data of a picture to be printed can be obtained from outside, color tone control should be performed for a specific point of interest in the picture immediately after printing is started, without waiting for printing of an OK sheet. Can be. Further, if an ICC profile can be obtained in addition to the kcmy halftone dot area ratio data of the picture to be printed, the color tone can be controlled based on the ICC profile obtained from the print request source or the like, and the print request source or the like can control the color tone. A printed material having a color tone can be easily obtained.

Also, by displaying the actual color coordinate values and the color difference between the actual color coordinate values and the target color coordinate values on the display device, it is possible for the operator to intuitively understand at what level the colors match. it can.
Further, as a method of setting a point of interest, a pixel having the highest density sensitivity for each ink color or a pixel having the highest autocorrelation with respect to the dot area ratio of each pixel for each ink color is automatically extracted and By setting the pixel of interest as a target pixel, more stable color tone control can be performed when the image streak rate within the unit width of the ink supply is low.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(A) First Embodiment FIG. 1 is a view showing a schematic configuration of a newspaper offset rotary press according to a first embodiment of the present invention. The newspaper offset rotary press according to the present embodiment is a two-sided printing press for multicolor printing, and ink colors [black (k), indigo (c), red (m), and yellow (y) are arranged along the conveyance path of the printing sheet 8. )], Printing units 2a, 2b, 2c, 2d are provided. In the present embodiment, the printing units 2a, 2b, 2c, 2d include an ink key type ink supply device including an ink key 7 and an ink source roller 6. In the ink supply device of this type, the ink supply amount can be adjusted by the gap amount of the ink key 7 with respect to the ink source roller 6 (hereinafter, this gap amount is referred to as the ink key opening degree). In addition, a plurality of ink keys 7 are arranged side by side in the printing width direction, and the ink supply amount can be adjusted in the width unit of the ink key 7 (hereinafter, the unit width of ink supply by the ink key 7 is referred to as a key zone). The ink whose supply amount has been adjusted by the ink key 7 is appropriately kneaded in the ink roller group 5 to form a thin film, and then supplied to the plate surface of the plate cylinder 4. Is transferred to the print sheet 8. Although omitted in FIG. 1, the newspaper offset rotary press according to the present embodiment is a two-sided printing machine. Therefore, a pair of printing units 2a, 2b, 2c, and 2d sandwich a conveyance path of the printing sheet 8 therebetween. Blanket cylinders 3 and 3 are provided, and a plate cylinder 4 and an ink supply device are provided for each blanket cylinder 3.

The newspaper offset rotary press according to the present embodiment includes the line sensor type IRGB densitometer 1 further downstream of the most downstream printing unit 2d. The line sensor type IRGB densitometer 1 reflects the color of the pattern on the print sheet 8 in the form of a line in the printing width direction in the reflection density of I (infrared light), R (red), G (green), and B (blue) This is a measuring device that measures the reflection density of the entire print sheet 8 or the reflection density at an arbitrary position. Since the newspaper rotary press according to the present embodiment is duplex printing, the line sensor type IRGB densitometer 1 is arranged on both the front and back sides so as to sandwich the conveyance path of the print sheet 8 so that the reflection density on both front and back sides can be measured. .

The reflection density measured by the line sensor type IRGB densitometer 1 is transmitted to the arithmetic unit 10. The computing device 10 is a device that computes control data of the ink supply amount, performs a computation based on the reflection density measured by the line sensor type IRGB densitometer 1, and matches the color of the pattern on the print sheet 8 with the target color. Of the ink key 7 is calculated. Here, FIG. 2 is a diagram showing a schematic configuration of a picture color tone control device of a newspaper offset rotary press according to an embodiment of the present invention, and is a functional block diagram focusing on a color tone control function of the arithmetic unit 10. .

The arithmetic unit 10 is composed of a DSP (digital signal processor) 11 and a PC (personal computer) 12 which are set apart from the printing press. The PC 12 has a color conversion unit 14, an ink supply amount operation unit 15, and an online unit. Functions as a control unit 16 and a key opening limiter calculation unit 17 are assigned. The input side of the arithmetic unit 10 is connected to the line sensor type IRGB densitometer 1, and the output side is connected to the control unit 20 with a built-in printing machine. The control device 20 functions as an ink supply amount adjusting unit that adjusts the ink supply amount for each key zone of the ink key 7, controls an opening / closing device (not shown) that opens and closes the ink key 7, and controls each printing unit 2a, The key opening can be adjusted independently for each of the ink keys 7 of 2b, 2c and 2d. The touch panel 30 as a display device is connected to the arithmetic unit 10. The print surface of the print sheet 8 captured by the line sensor type IRGB densitometer 1 is displayed on the touch panel 30, and an arbitrary area on the print surface can be selected with a finger.

FIG. 3 and FIG. 4 are diagrams showing the processing flow of the tone control by the arithmetic unit 10. Hereinafter, the processing content of the color tone control by the arithmetic unit 10 will be described mainly with reference to FIGS. First, the tone control at the time of starting the printing press, that is, at the start of printing will be described with reference to FIG.
If there is no pixel area ratio data such as CIP3 data, it is necessary to determine some target value for feedback control in order to perform color tone control from the start. In this embodiment, since the reflection density, that is, the halftone dot density is measured by using the line sensor type IRGB densitometer 1, the target halftone dot density is set as the target value in step S0 according to the following procedure.

First, the image ratio Ak, Ac, Am, and Ay data for each key zone of each ink color in the current print pattern is input to the PC 12. The image ratios Ak, Ac, Am and Ay can be obtained by measuring a film for plate making with a film scanner or by measuring a printing plate with a plate scanner. The color conversion unit 14 of the PC 12 includes a database 141 that associates the halftone dot area ratio of each ink color with the halftone density of the mixed color. The database 141 prints a printed matter based on the newspaper printing JapanColor standard established by the ISO / TC130 National Committee, and uses data measured by an IRGB densitometer [dot area ratio (k, c, m, y) of a standard color and a mixed color mesh. Conversion table that defines the correspondence between the densities (I, R, G, B) and the color coordinate values (L, a, b)]. Using this database 141, the color conversion unit 14 obtains the color mixture halftone density corresponding to the input image ratio Ak, Ac, Am, Ay for each key zone, and obtains the target color mixture halftone density Io, Ro, Go, Bo. Set as

In addition, even in the case of print patterns having the same image ratios Ak, Ac, Am, and Ay, coloring is performed according to the density of the screen constituting the print pattern (50% flat screen, 80% flat screen, solid, etc.) in consideration of the dot gain. The density value to be obtained differs. Therefore, the color conversion unit 14 can change the dot gain for each halftone density and change the parameters having the dot gain as a function of the image ratios Ak, Ac, Am, and Ay to the mixed color halftone densities Io, Ro, Go, Bo. The target color mixture halftone densities Io, Ro, Go, and Bo can be set in consideration of the dot gain.

(4) When the target color mixture halftone densities Io, Ro, Go, and Bo are set as described above, printing is started, and the processing from step S10 is repeated. First, in step S10, the line sensor type IRGB densitometer 1 measures reflected light amounts i ', r', g ', and b' for each pixel on the entire surface of the print sheet 8. The reflected light amounts i ', r', g ', b' of each pixel measured by the IRGB densitometer 1 are input to the DSP 11.

As a step S20, the DSP 11 performs a moving average of the reflected light amounts i ', r', g ', and b' of each pixel in units of a predetermined number of printed sheets, so that the reflected light amounts i, r of the pixels from which noise components have been removed. , G, and b are calculated. Then, as step S30, the reflected light amounts i, r, g, and b are averaged for each key zone, and the mixed color halftone densities (actual mixed color halftone densities) I, R, G, and B based on the reflected light amount of the blank portion are used. Calculate. For example, assuming that the reflected light amount of the infrared light in the white paper portion is ip and the average reflected light amount of the infrared light in the key zone is ik, the actual color mixture halftone density I of the infrared light is I = log 10 (ip / ik). Is required. The real color mixture halftone densities I, R, G, and B for each key zone calculated by the DSP 11 are input to the color conversion unit 14 of the PC 12.

The color conversion unit 14 performs the processing of steps S40, S50, and S60. First, at step S40, the halftone of each ink color corresponding to the target halftone density Io, Ro, Go, Bo set at step S0 and the actual halftone density I, R, G, B calculated at step S30. Each point area ratio is calculated. In this calculation, the database 141 is used, and based on the correspondence stored in the database 141, the halftone dot area ratios of the respective ink colors corresponding to the target halftone dot densities Io, Ro, Go, Bo are calculated using the target halftone dot area ratios ko, The calculation is performed as co, mo, yo, and the dot area ratio of each ink color corresponding to the actual mixed color halftone density I, R, G, B is calculated as the actual dot area ratio k, c, m, y.

Next, as step S50, the color conversion unit 14 calculates the monochromatic halftone density of each ink color corresponding to the target halftone dot area ratio ko, co, mo, yo and the actual halftone dot area ratio k, c, m, y. Each is calculated. For this calculation, a map as shown in FIG. 5 is used. FIG. 5 is an example of a map in which a single-color halftone density actually measured when the halftone dot area ratio is changed is plotted as a characteristic curve, and is created from data measured in advance. In the example shown in FIG. 5, by comparing the target halftone dot area ratio ko and the actual halftone dot area ratio k of the black color with the map, the target single-color halftone density Dako and the real single-color halftone density Dak are respectively obtained from the characteristic curves in the map. It has been demanded. In this way, the color conversion unit 14 obtains the target single-color halftone densities Dako, Daco, Damo, Dayo and the actual single-color halftone densities Dak, Dac, Dam, Day for each ink color.

Next, as step S60, the color conversion unit 14 performs the solid density deviation ΔDsk of each ink color corresponding to the deviation between the target single color halftone densities Dako, Daco, Damo, Dayo and the actual single color halftone densities Dak, Dac, Dam, Day. , ΔDsc, ΔDsm, and ΔDsy. Note that the solid density also depends on the halftone dot area ratio. For the same monochrome halftone density, the higher the halftone dot area ratio, the lower the solid density. Thus, the color conversion unit 14 performs an operation using a map as shown in FIG. FIG. 6 is an example of a map in which a single-color halftone density actually measured when the solid-color solid density is changed is plotted as a characteristic curve for each halftone dot area ratio, and is created from data measured in advance. The color conversion unit 14 selects a characteristic curve corresponding to the target halftone dot area ratio ko, co, mo, yo from each of the ink colors from the map shown in FIG. 6, and sets the target characteristic monochromatic halftone densities Dako, Daco, The solid density deviations ΔDsk, ΔDsc, ΔDsm, and ΔDsy are obtained by associating Damo, Dayo with the actual monochromatic halftone densities Dak, Dac, Dam, and Day. In the example shown in FIG. 6, when the target halftone dot area ratio ko of black is 75%, the target single-color halftone density Dako and the actual single-color halftone density Dak are compared with the map to obtain the black color from the 75% characteristic curve in the map. Is obtained.

The solid density deviations ΔDsk, ΔDsc, ΔDsm, and ΔDsy of the respective ink colors calculated by the color conversion unit 14 are input to the ink supply amount calculation unit 15. In step S70, the ink supply amount calculation unit 15 calculates key opening degree deviation amounts ΔKk, ΔKc, ΔKm, ΔKy corresponding to the solid density deviations ΔDsk, ΔDsc, ΔDsm, and ΔDsy. The key opening deviation amounts ΔKk, ΔKc, ΔKm, ΔKy are the current key opening Kk0, Kc0, Km0, Ky0 of each ink key 7 (the key opening output to the control device 20 of the printing press in the previous process of step S100). Kk, Kc, Km, Ky), and the ink supply amount calculation unit 15 performs calculation using a known API function (auto preset inking function). The API function is a function indicating the correspondence between the image ratio A (Ak, Ac, Am, Ay) of each key zone and the key opening K (Kk, Kc, Km, Ky) in order to set the reference density. The image ratio A used in step S0 can be used. More specifically, the ratio kd (kd = ΔDs / Ds) of the solid density deviation ΔDs (ΔDsk, ΔDsc, ΔDsm, ΔDsy) to the reference density Ds (Dsk, Dsc, Dsm, Dsy) is determined. A key opening K for obtaining a reference density is obtained by using an API function, and a key opening deviation amount ΔK (ΔK = kd × K) for making the solid density deviation ΔDs zero is obtained as a product of these.

Next, in step S80, the online control unit 16 sends the key opening degree deviation amounts ΔKk, ΔKc, ΔKm, ΔKy calculated by the color conversion unit 14 from the printing units 2a, 2b, 2c, 2d to the line sensor type IRGB. The correction is made in consideration of the dead time up to the densitometer 1, the reaction time of the ink key 7 per time, and the printing speed. This correction is performed by inputting the key opening signal, moving the ink key 7, changing the key opening, changing the amount of ink supplied to the print sheet, and detecting the change in the amount of reflected light by the IRGB densitometer 1. It takes into account the time delay until As such an online feedback control system having a large dead time, for example, PI control with dead time compensation, fuzzy control, robust control, and the like are optimal. The online control section 16 adds the current key opening Kk0, Kc0, Km0, Ky0 to the corrected key opening deviation (on-line control key opening deviation) ΔKk, ΔKc, ΔKm, ΔKy. The key openings Kk1, Kc1, Km1, and Ky1 are input to the key opening limiter calculator 17.

In step S90, the key opening limiter calculating unit 17 performs a correction that regulates the upper limit of the online control key openings Kk1, Kc1, Km1, and Ky1 calculated by the online control unit 16. This is a process for restricting an abnormal increase in the key opening due to an estimation error of the color conversion algorithm (the processes in steps SS40, S50, and S60) particularly in a low image area. Then, as step S100, the key opening limiter calculating unit 17 transmits the key opening Kk, Kc, Km, Ky with the upper limit regulated as a key opening signal to the control device 20 of the printing press.

At step S110, the controller 20 of the printing press determines the opening degree of each ink key 7 of each printing unit 2a, 2b, 2c, 2d based on the key opening degree signals Kk, Kc, Km, Ky transmitted from the arithmetic unit 10. Adjust. As a result, the ink supply amount of each ink color is controlled to match the target color tone for each key zone.
As described above, according to the color tone control method according to the present embodiment, since the color tone can be controlled immediately after the start of the printing press as described above, the time until an OK sheet is obtained can be reduced. After the OK sheet is obtained, color tone control is performed according to the flowchart of FIG. Hereinafter, the color tone control after the OK sheet is obtained will be described with reference to FIG.

Before and after the OK sheet is obtained, there is a difference in the content of the calculation process for calculating the halftone density of the color mixture for each key zone. That is, as shown in FIG. 4, the process of step S31 is performed instead of the process of step S0 and the process of step S30 before an OK sheet is obtained.
In step S31, the DSP 11 sets the target color mixture halftone densities Io, Ro, Go, Bo for a specific target point (target pixel) in the OK sheet, and also sets the reflected light amounts i, r of the pixels calculated in step S20. , G, and b, the actual color mixture halftone densities I, R, G, and B of the target point are calculated. The DSP 11 is connected to the touch panel 30, and the touch panel 30 displays a picture image of an OK sheet. The point of interest is designated by arbitrarily selecting a specific point on the OK sheet displayed on the touch panel 30 and is input to the DSP 11 of the arithmetic device 10. The point of interest is a position of a picture on the print sheet 8 where a color is particularly desired to be matched, and designates a specific pixel or a plurality of pixels in a continuous block. For a key zone for which a point of interest is not specified by the operator, the DSP 11 automatically sets the point of interest. This automatic setting is performed by calculating the pixel having the highest density sensitivity (the pixel having the largest color development) for each ink color from the distribution of the color mixture halftone density of each ink color of the entire OK sheet and automatically extracting the same. For example, if the key zone pattern is printed in four colors, the points of interest (target colors) are black, indigo, red, and yellow, and the four colors are independently controlled in the key zone. Become. Further, for example, a color that is not in an arbitrary pattern point designated by the operator and a color with a small pattern area can be automatically set.

The DSP 11 calculates the target color mixture halftone densities Io, Ro, Go, Bo from the reflected light amounts i, r, g, b of the target point of the OK sheet and the reflected light amounts of the blank portion, and calculates the target color of the printing sheet (final printing sheet) 8. The actual color mixture halftone densities I, R, G, and B are calculated from the reflected light amounts i, r, g, and b at the target point and the reflected light amounts at the blank portion. When the point of interest is a set of a plurality of pixels, the reflected light amounts i, r, g, and b are averaged by a plurality of pixels forming the point of interest. The subsequent processing from step S40 to step S110 is the same as the processing before the OK sheet shown in the flowchart of FIG. 3 is obtained, and the arithmetic unit 10 sets the target at the target point obtained as described above. Based on the color mixture halftone densities Io, Ro, Go, Bo and the actual color mixture halftone densities I, R, G, B, the key opening degree of the ink key 7 for matching the picture color tone of the printing sheet with the picture color tone of the OK sheet is calculated. I do.

As described above, according to the color tone control method according to the present embodiment, when an OK sheet that satisfies the print quality is obtained, a point of interest corresponding to each ink color is set for each key zone of the OK sheet. Then, the halftone density of the mixed color halftone at the point of interest is set as the target halftone density of mixed color halftones Io, Ro, Go, and Bo. Therefore, even when there is no plate making data such as 1-bit Tiff or CIP3 data, color tone control can be performed for a specific point of interest of a picture. Further, since the measured values are not averaged over the entire key zone, even if the image coverage of the pattern in the key zone is low (for example, even if a small pattern of one point exists in the key zone), the line sensor type IRBG is used. The measurement error of the densitometer 1 is small, and stable color tone control can be performed. In particular, by calculating the pixel with the highest density sensitivity for each ink color and automatically extracting and setting it as the pixel of interest, more stable color tone control can be performed even when the image ratio of the pattern in the key zone is low. Can be. Specifically, for example, the density sensitivity Hdc of cyan can be expressed as “Hdc = R 2 / (R + G + B + I)” using the measured density data (R, G, B, I). The pixel with the highest value is the point of interest for cyan. Similarly, for the other ink colors, a pixel having the highest density sensitivity is calculated, and the pixel is set as a point of interest.

(B) Second Embodiment A second embodiment of the present invention will be described with reference to FIG. The present embodiment is characterized by a processing method of the key zone target point density calculation corresponding to step S31 in FIG. 4, and the flowchart shown in FIG. 7 is a processing content in this embodiment (processing corresponding to step S31 in FIG. 4). Content) is shown in detail. The other processing contents for the picture color tone control are as described with reference to FIG. 6, and thus the description is omitted here.

In the present embodiment, it is assumed that halftone dot area ratio data can be acquired from outside (for example, a print request source for a printing company, a newspaper company's head office for a printing plant of a newspaper company, etc.), and here, It is assumed that newspaper page information is transmitted to a printing factory in the form of bitmap data (1 bit-Tiff plate making data). First, in step S311, the transmitted bitmap data is converted into low-resolution data corresponding to CIP3 data according to the format of the printing press, and the low-resolution data is used as pixel area ratio data. This resolution conversion processing is for sharing with general CIP3 data, but it is also possible to use the bitmap data itself as pixel area ratio data in subsequent processing.

In step S312, a point of interest corresponding to each ink color is set for each ink supply unit width. As a method of setting a point of interest, a picture image of a newspaper page is displayed on the touch panel 30 using the bitmap data transmitted from the head office of the newspaper company, and a specific point on the newspaper page displayed on the touch panel 30 is designated by the operator. There is a method of arbitrarily selecting. There is also a method of calculating a pixel having the largest autocorrelation with respect to a dot area ratio of each color and each pixel, automatically extracting the pixel, and automatically setting the pixel as a point of interest (pixel of interest). Specifically, for example, the autocorrelation sensitivity Hc of cyan can be represented by “Hc = c 2 / (c + m + y + k)” using the pixel area ratio data (c, m, y, k). The pixel having the highest value of the correlation sensitivity Hc is the point of interest for cyan. Similarly, for the other ink colors, a pixel having the highest autocorrelation sensitivity is calculated, and the pixel is set as a point of interest.

In step S313, the halftone dot area ratios ki, ci, mi, and yi of the target point are converted into halftone dot densities using the conversion table recorded in the database 141, and the halftone dot densities Io, Ro, Go, and Bo are output. Set as In step S314, the actual color mixture halftone densities I, R, G, and B of the target point are calculated using the reflected light amounts of the respective pixels calculated in step S20. The method of calculating the actual mixed color halftone densities I, R, G, and B has been described in the first embodiment, and a description thereof will be omitted.

According to the method of the present embodiment, it is possible to accurately perform color tone control on a specific target point of a picture immediately after printing is started, without waiting for printing of an OK sheet. Therefore, it is possible to further shorten the time until an OK sheet is obtained and reduce waste paper. In particular, when the pixel having the highest autocorrelation with respect to the dot area ratio of each color and each pixel is set as the point of interest, the sensing sensitivity is improved, so that the desired color tone can be quickly adjusted.

In step S312, a pixel group including a plurality of pixels may be selected as a point of interest. For example, when an arbitrary pixel is selected by the operator or a pixel having the highest autocorrelation sensitivity is automatically selected, a pixel group including surrounding pixels is selected as a point of interest. The number of peripheral pixels to be included in the point of interest and the selection pattern thereof may be fixed (for example, eight peripheral pixels surrounding the selected or automatically extracted pixel), but preferably the number of pixels in the pattern of the selected or automatically extracted pixel is preferable. Is set so that the influence of disturbance is suppressed in consideration of the position and the like in the above. When the pixel group is selected as a point of interest, the average color mixture halftone density of the pixel group is set as the target color mixture halftone density in step S313, and the actual average color mixture halftone density of the pixel group is measured in step S314. According to this, the fluctuation of the measurement data due to the meandering of the printing paper surface or the misalignment is reduced, so that stable feedback control can be performed.

(C) Third Embodiment A third embodiment of the present invention will be described with reference to FIG. Similar to the second embodiment, this embodiment is characterized by a key zone target point density calculation processing method corresponding to step S31 in FIG. 4, and the flowchart shown in FIG. The processing contents corresponding to step S31) are shown in detail. The other processing contents for controlling the picture color tone are the same as those described with reference to FIG.

In this embodiment, as in the second embodiment, it is assumed that the newspaper page information is transmitted from the head office of the newspaper company to the printing factory in the form of bitmap data. However, in the present embodiment, as a difference from the second embodiment, it is assumed that an ICC profile of an input device that has created paper color information is also transmitted in addition to bitmap data of paper information. In step S321, the bitmap data is converted into low-resolution data corresponding to CIP3 data corresponding to the format of the printing press. In step S322, a point of interest corresponding to each ink color is set for each ink supply unit width. Since the processing contents of steps S321 and S322 are the same as the processing contents of steps S311 and S312 according to the second embodiment, detailed description thereof will be omitted.

In step S323, the halftone dot area ratios ki, ci, mi, and yi of the target point are converted into color coordinate values L, a, and b using the ICC profile transmitted from the head office of the newspaper company. In step S324, the color coordinate values L, a, and b obtained in step S323 are converted into mixed color halftone density using the conversion table stored in the database 141. However, since the color coordinate value is three-dimensional information and the color mixture halftone density is four-dimensional information, the color mixture halftone density corresponding to the color coordinate value is not uniquely determined. Although some additional information is required to uniquely determine the color mixture halftone density, only three-dimensional information called color coordinate values can be obtained from the ICC profile.

Therefore, in the present embodiment, as will be described in the following steps, halftone dot area ratio data of a print pattern, that is, halftone dot area ratios ki, ci, mi, yi corresponding to the color coordinate values L, a, b are used. By doing so, in developing such three-dimensional information into four-dimensional information, the most appropriate four-dimensional information is selected from the myriad of candidate four-dimensional information.
First, in step S325, the halftone dot area ratios ki, ci, mi, and yi of the target point are converted into color coordinate values L ', a', and b 'using the conversion table stored in the database 141. In step S326, a color difference ΔL ′, Δa ′, Δb ′ between the color coordinate values L, a, b obtained in step S323 and the color coordinate values L ′, a ′, b ′ obtained in step S325 is calculated. In S327, the halftone dot area change amounts Δk ′, Δc ′, Δm ′, Δy ′ corresponding to the color differences ΔL ′, Δa ′, Δb ′ are calculated. Each change amount of the halftone dot area ratio can be approximated by the following equation using each change amount of the color coordinate value. Here, a and b in the following equation are linear approximation coefficients.

Δc ′ = a11 × ΔL ′ + a12 × Δa ′ + a13 × Δb ′ + bc (1)
Δm ′ = a21 × ΔL ′ + a22 × Δa ′ + a23 × Δb ′ + bm (2)
Δy ′ = a31 × ΔL ′ + a32 × Δa ′ + a33 × Δb ′ + by (3)
Δk ′ = a41 × ΔL ′ + a42 × Δa ′ + a43 × Δb ′ + bk (4)
In step S328, the change amounts Δk ′, Δc ′, Δm ′, and Δy ′ obtained in step S327 are added to the halftone dot area ratios ki, ci, mi, and yi of the target point, and the value is added to the virtual halftone dot area ratio k. ', C', m ', y'. In step S329, the virtual halftone dot area ratios k ', c', m ', and y' are checked against the conversion table recorded in the database 141, and the virtual halftone dot density is determined from among the plurality of mixed color halftone density candidates determined in step S324. The one that most corresponds to the point area ratios k ′, c ′, m ′, and y ′ is selected. The selected halftone halftone densities are set as target halftone halftone densities Io, Ro, Go, and Bo, and the actual halftone halftone densities I, R, G, and B of the target point calculated in step S330 are used in the processing from step S40. Used.

According to this method, the color tone can be controlled by using the ICC profile obtained from the print request source or the like. Can be accurately and easily adjusted to a desired color tone. Therefore, according to the present method, the amount of waste paper until the OK sheet is obtained can be significantly reduced.

(D) Fourth Embodiment A fourth embodiment of the present invention will be described with reference to FIG. The present embodiment is a proposal for an auxiliary method for color tone control, and the method can be additionally applied to any of the color tone controls of the first to third embodiments.
In step S401, the target color mixture halftone densities Io, Ro, Go, and Bo are converted into color coordinate values using the conversion table recorded in the database 141. In step S402, the actual color mixture halftone densities I, R, G, and B are converted into color coordinate values using the conversion table. Then, in step S403, the color difference ΔE * (= L (Lo−L) 2 between the target color coordinate values Lo, ao, bo determined in step S401 and the actual color coordinate values L, a, b determined in step S402. + (Ao-a) 2 + (bo-b) 2 } is calculated, and in step S404, the actual color coordinate values L, a, b and the color difference ΔE * are displayed on the display device 32.

Since the L * a * b * color system is a color system in which the coordinates are linear with respect to human color stimuli, the color of the point of interest is represented by the color coordinate values L, a, b as in this method. By displaying or displaying the color difference ΔE * with respect to the target color at the point of interest, it is possible for the operator to intuitively understand at what level the color matches. Therefore, by performing the present method in addition to the color tone control of the first to third embodiments, it is possible to assist the operator's judgment and perform more accurate color matching.

(E) Others Although the embodiment of the present invention has been described above, the embodiment of the present invention is not limited to the above. For example, in the first embodiment, in addition to the method including the database 141 for associating the dot area ratio of each ink color and the halftone density of a mixed color, the correspondence between the halftone area ratio of each ink color and the halftone density of a mixed color is defined. A well-known Neugebauer formula is stored, and a halftone dot area ratio of each ink color is applied to this formula to calculate a halftone density of mixed color.

In addition to a method of obtaining a solid density deviation of each ink color corresponding to a deviation between the target single color halftone density and the actual single color halftone density using a map as shown in FIG. There is also a method of storing a well-known Yule-Nielsen equation that defines a correspondence relationship with the density, and calculating a solid density deviation by applying the target halftone dot area ratio, the actual halftone dot area rate, and the single-color halftone density to this equation. is there.

Also, in the embodiment, the line sensor type IRGB densitometer is used, but the print sheet may be two-dimensionally scanned using the spot type IRGB densitometer.

It is a figure showing the schematic structure of the web offset press for newspapers concerning a 1st embodiment of the present invention. FIG. 2 is a functional block diagram focusing on a color tone control function of the arithmetic device of FIG. 1. 2 is a flowchart showing a processing flow of color tone control at the time of starting printing by the arithmetic device of FIG. 1. 3 is a flowchart illustrating a processing flow of color tone control after printing an OK sheet by the arithmetic device of FIG. 1. It is a map which associates a single color halftone density with a halftone dot area ratio. 5 is a map that associates a solid density with a dot area ratio and a monochrome halftone density. It is a flow chart which shows the processing flow of tone control concerning a 2nd embodiment of the present invention. It is a flow chart which shows the processing flow of color tone control concerning a 3rd embodiment of the present invention. It is a flow chart which shows the processing flow of tone control concerning a 4th embodiment of the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Line sensor type IRGB densitometer 2a, 2b, 2c, 2d Printing unit 3 Blanket cylinder 4 Plate cylinder 5 Ink roller group 6 Ink source roller 7 Ink key 8 Printing sheet 10 Computing device 11 DSP
12 PC
14 Color conversion unit 15 Ink supply amount calculation unit 16 Online control unit 17 Key opening limiter calculation unit 20 Control device built in printing press 30 Touch panel 32 Display device

Claims (15)

  1. Setting a target color mixture halftone density for each ink supply unit width when the print pattern is divided by the ink supply unit width of the ink supply device;
    Using an IRGB densitometer to measure the actual color mixture halftone density for each of the ink supply unit widths of the final printing sheet obtained by printing;
    Obtaining a target halftone dot area ratio of each ink color corresponding to the target halftone dot density based on a correspondence relationship between the halftone dot density and the halftone halftone density set in advance;
    A step of obtaining an actual halftone dot area ratio of each ink color corresponding to the actual halftone dot density based on the correspondence between the halftone dot area ratio and the halftone dot density;
    A step of obtaining a target single-color halftone density corresponding to the target halftone density based on a correspondence relationship between a predetermined halftone area ratio and a single-color halftone density;
    A step of obtaining an actual monochrome halftone density corresponding to the actual halftone dot area ratio based on the correspondence relationship between the halftone dot area ratio and the monochrome halftone density;
    A solid color corresponding to a deviation between the target single-color halftone density and the actual single-color halftone density under the target halftone density based on a correspondence relationship between a predetermined halftone dot density, a single-color halftone density, and a solid density. Determining a density deviation;
    Adjusting the ink supply amount for each ink supply unit width based on the solid density deviation.
  2. In the step of setting the target color mixture halftone density, based on the correspondence relationship between the halftone dot area ratio and the color mixture halftone density, the image ratio corresponding to each ink supply unit width of each ink color in the current print pattern is corresponded. 2. The picture color tone control method for a printing press according to claim 1, wherein a mixed color halftone density is obtained, and a mixed color halftone density corresponding to the image coverage is set as the target mixed halftone density.
  3. When an OK sheet that satisfies print quality is obtained,
    In the step of setting the target color mixture halftone density, a pixel of interest corresponding to each ink color is selected for each of the ink supply unit widths from the pixels constituting the picture of the OK sheet, and the color mixture net of the pixel of interest is selected. Set the density as the target color mixture halftone density,
    3. The picture color tone control method for a printing press according to claim 1, wherein in the step of measuring the actual color mixture halftone density, the actual color mixture halftone density of the pixel of interest is measured.
  4. The step of setting the target color mixture halftone density includes:
    Obtaining kcmy halftone dot area ratio data of the picture to be printed from outside;
    A step of selecting a target pixel corresponding to each ink color for each of the ink supply unit widths from among the pixels constituting the print target picture,
    Converting the dot area ratio of the pixel of interest into a mixed-color halftone density based on a correspondence relationship between a preset halftone-dot area ratio and a mixed-color halftone density,
    In the step of setting the target color mixture halftone density, the color mixture halftone density of the target pixel is set as the target color mixture halftone density,
    2. The picture color tone control method for a printing press according to claim 1, wherein in the step of measuring the actual color mixture halftone density, the actual color mixture halftone density of the target pixel is measured.
  5. The step of setting the target color mixture halftone density includes:
    Externally obtaining kcmy halftone dot area ratio data and an ICC profile of a picture to be printed;
    A step of selecting a target pixel corresponding to each ink color for each of the ink supply unit widths from among the pixels constituting the print target picture,
    Converting the halftone dot area ratio of the target pixel into a mixed color halftone density using the ICC profile and the device profile of the IRGB densitometer,
    In the step of setting the target color mixture halftone density, the color mixture halftone density of the target pixel is set as the target color mixture halftone density,
    2. The picture color tone control method for a printing press according to claim 1, wherein in the step of measuring the actual color mixture halftone density, the actual color mixture halftone density of the target pixel is measured.
  6. The device profile is a conversion table that defines the correspondence between the dot area ratio, the halftone density, and the color coordinate values,
    The step of converting the halftone dot area ratio of the target pixel into a mixed color halftone density includes:
    Converting the halftone dot area ratio of the pixel of interest into color coordinate values using the ICC profile;
    Obtaining a plurality of color mixture halftone density candidates corresponding to the color coordinate values of the pixel of interest using the conversion table;
    Converting the halftone dot area ratio of the pixel of interest into color coordinate values using the conversion table;
    Calculating a color difference between the two color coordinate values obtained by the conversion using the ICC profile and the conversion using the conversion table;
    Calculating a change amount of the dot area ratio corresponding to the color difference;
    Obtaining a virtual halftone dot area ratio by adding the change amount to the halftone dot area ratio of the pixel of interest;
    Selecting the most corresponding to the virtual halftone dot area ratio among the plurality of color mixture halftone density candidates with reference to the conversion table,
    6. The pattern of a printing press according to claim 5, wherein in the step of converting the halftone dot area ratio of the pixel of interest into a mixed color halftone density, the selected mixed color halftone density candidate is set as the mixed color halftone density of the pixel of interest. Color tone control method.
  7. In the step of obtaining the kcmy halftone dot area ratio data, first, the bitmap data of the picture to be printed is obtained, and the bitmap data converted to low-resolution data equivalent to CIP3 data is converted to the kcmy halftone dot area ratio. The picture color tone control method for a printing press according to any one of claims 4 to 6, wherein the method is used as data.
  8. Obtaining a real color coordinate value corresponding to the actual mixed color halftone density of the target pixel measured by the IRGB densitometer based on the correspondence between the color mixture halftone density and the color coordinate value set in advance;
    Obtaining a target color coordinate value corresponding to the target color mixture halftone density based on the correspondence between the color mixture halftone density and the color coordinate values;
    A stop for calculating a color difference between the actual color coordinate value and the target color coordinate value,
    Displaying the actual color coordinate value and / or the color difference on a display device. The method according to claim 3, further comprising the step of:
  9. 9. The printing press according to claim 3, wherein a pixel having the largest autocorrelation with respect to a dot area ratio of each pixel is automatically extracted as the target pixel for each ink color. 10. Picture color tone control method.
  10. Automatically extracting a pixel group including a pixel having the largest autocorrelation with respect to a dot area ratio of each pixel and a plurality of pixels around the pixel as the noted pixel for each ink color,
    In the step of setting the target color mixture halftone density, the average color mixture halftone density of the pixel group is set as the target color mixture halftone density,
    The method according to any one of claims 3 to 8, wherein in the step of measuring the actual color mixture halftone density, an actual average color mixture halftone density of the pixel group is measured.
  11. An ink supply device that supplies ink for each area divided in the printing width direction,
    Target color mixture halftone density setting means for setting a target color mixture halftone density for each of the ink supply unit widths when the print pattern is divided by the ink supply unit width of the ink supply device,
    An IRGB densitometer arranged on a running line of a final printing sheet obtained by printing;
    Mixed color halftone density measuring means for operating the IRGB densitometer to measure an actual mixed color halftone density for each of the ink supply unit widths of the final printing sheet;
    Target halftone dot area ratio calculating means for obtaining a target halftone dot area ratio of each ink color corresponding to the target halftone dot density based on a correspondence relationship between a halftone dot ratio and a halftone halftone density set in advance;
    An actual halftone dot area ratio calculating means for calculating an actual halftone dot area ratio of each ink color corresponding to the actual halftone dot density based on the correspondence between the halftone dot area ratio and the mixed color halftone density;
    A target single-color halftone density calculating means for obtaining a target single-color halftone density corresponding to the target halftone density based on a correspondence relationship between a predetermined halftone area ratio and a single-color halftone density;
    Based on the correspondence between the halftone dot area ratio and the single-tone halftone density, an actual single-color halftone density calculating means for obtaining an actual single-tone halftone density corresponding to the real halftone dot area ratio;
    A solid color corresponding to a deviation between the target single-color halftone density and the actual single-color halftone density under the target halftone density based on a correspondence relationship between a predetermined halftone dot density, a single-color halftone density, and a solid density. Solid density deviation calculating means for obtaining a density deviation,
    A picture color tone control device for a printing press, comprising: an ink supply amount adjusting means for adjusting an ink supply amount for each ink supply unit width based on the solid density deviation.
  12. A conversion table defining a correspondence relationship between a halftone dot area ratio, a mixed color halftone density, and a color coordinate value in the IRGB densitometer;
    The target halftone dot area ratio calculating means and the actual halftone dot area ratio calculating means are configured to obtain the target halftone dot area ratio or the real halftone dot area ratio using the conversion table. The picture color tone control device for a printing press according to claim 11, wherein
  13. The target color mixture halftone density setting means,
    Receiving means for externally receiving kcmy halftone dot area ratio data of a picture to be printed;
    Target pixel setting means for setting a target pixel corresponding to each ink color for each of the ink supply unit widths from the pixels constituting the print target picture pattern,
    A conversion unit that converts the halftone dot area ratio of the target pixel into a mixed-color halftone density using the conversion table, and is configured to set the mixed-color halftone density of the target pixel as the target mixed halftone density;
    13. The picture color tone control device for a printing press according to claim 12, wherein said mixed color halftone density measuring means is configured to measure the actual mixed color halftone density of said pixel of interest.
  14. The target color mixture halftone density setting means,
    Receiving means for externally receiving kcmy halftone dot area ratio data and an ICC profile of a picture to be printed;
    Target pixel setting means for setting a target pixel corresponding to each ink color for each of the ink supply unit widths from the pixels constituting the print target picture pattern,
    Converting means for converting the halftone dot area ratio of the target pixel into a mixed color halftone density using the ICC profile and the conversion table, wherein the mixed color halftone density of the target pixel is set as the target mixed color halftone density. Composed,
    13. The picture color tone control device for a printing press according to claim 12, wherein said mixed color halftone density measuring means is configured to measure the actual mixed color halftone density of said pixel of interest.
  15. Real color coordinate value calculating means for obtaining a real color coordinate value corresponding to the real color mixture halftone density using the conversion table,
    Target color coordinate value calculating means for obtaining a target color coordinate value corresponding to the target color mixture halftone density using the conversion table,
    Color difference calculating means for calculating a color difference between the actual color coordinate value and the target color coordinate value;
    The picture color tone control device for a printing press according to any one of claims 12 to 14, further comprising display means for displaying the actual color coordinate value and / or the color difference on a display device.
JP2003288582A 2002-08-26 2003-08-07 Pattern color control method for printing machine and printing machine Active JP3825427B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2002245587 2002-08-26
JP2003288582A JP3825427B2 (en) 2002-08-26 2003-08-07 Pattern color control method for printing machine and printing machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003288582A JP3825427B2 (en) 2002-08-26 2003-08-07 Pattern color control method for printing machine and printing machine
US11/295,496 US7573613B2 (en) 2003-08-07 2005-12-07 Method and apparatus for controlling picture color tone of printing press

Publications (3)

Publication Number Publication Date
JP2004106523A5 JP2004106523A5 (en) 2004-04-08
JP2004106523A true JP2004106523A (en) 2004-04-08
JP3825427B2 JP3825427B2 (en) 2006-09-27

Family

ID=32301182

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003288582A Active JP3825427B2 (en) 2002-08-26 2003-08-07 Pattern color control method for printing machine and printing machine

Country Status (1)

Country Link
JP (1) JP3825427B2 (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1629978A2 (en) 2004-08-31 2006-03-01 Mitsubishi Heavy Industries, Ltd. Picture color tone controlling method and apparatus
EP1634704A1 (en) 2004-09-10 2006-03-15 Mitsubishi Heavy Industries, Ltd. Picture colour tone controlling method and apparatus
WO2006051903A1 (en) * 2004-11-15 2006-05-18 Mitsubishi Heavy Industries, Ltd. Pattern color tone control method and controller
WO2006054521A1 (en) * 2004-11-19 2006-05-26 Mitsubishi Heavy Industries, Ltd. Pattern color tone control method and controller
WO2007004585A1 (en) * 2005-06-30 2007-01-11 Mitsubishi Heavy Industries, Ltd. Printing control method and printing system
WO2007083798A1 (en) * 2006-01-20 2007-07-26 Mitsubishi Heavy Industries, Ltd. Picture tone controller of printer and picture tone control method
WO2007088888A1 (en) 2006-01-31 2007-08-09 Mitsubishi Heavy Industries, Ltd. Method and device for checking picture tone to be printed by printer before printing, plate-making method, and method and device for controlling printer picture tone
WO2008007746A1 (en) 2006-07-12 2008-01-17 Mitsubishi Heavy Industries, Ltd. Printing simulation method and device, method and dvice for controlling pattern color tone of printer, and printer
WO2008026589A1 (en) * 2006-08-31 2008-03-06 Mitsubishi Heavy Industries, Ltd. Printer print evaluation information display device and print evaluation information display method
JP2008167463A (en) * 2008-01-21 2008-07-17 Mitsubishi Heavy Ind Ltd Method and apparatus for confirming color tone prior to printing in printing machine, and plate-making method
JP2008312220A (en) * 2008-07-07 2008-12-25 Mitsubishi Heavy Ind Ltd Checking method and device of texture color of printing machine
JP2009006728A (en) * 2008-10-16 2009-01-15 Mitsubishi Heavy Ind Ltd Target color mixture halftone density setting method and device for printer, and pattern color tone control method and device for printer
EP2056584A2 (en) 2007-11-02 2009-05-06 Fujifilm Corporation Image data correcting apparatus, computer-readable image data correcting program storage medium, image data correcting method and printing system
EP2111989A2 (en) 2008-04-24 2009-10-28 Mitsubishi Heavy Industries, Ltd. Ink print-through color value estimation method and apparatus, color value estimation method and apparatus taking ink print-though into consideration, target color setting method and apparatus taking ink print-through into consideration as well as controlling method and apparatus for printing press
US8189233B2 (en) 2007-10-23 2012-05-29 Fujifilm Corporation Density calculating apparatus, density setting apparatus, density calculating program storage medium, and density setting program storage medium
US8189232B2 (en) 2007-10-23 2012-05-29 Fujifilm Corporation Density calculating apparatus, density setting apparatus, density calculating program storage medium, and density setting program storage medium
JP2013126770A (en) * 2013-03-11 2013-06-27 Mitsubishi Heavy Industries Printing & Packaging Machinery Ltd Apparatus and method for controlling picture color tone of printer
JP2014018981A (en) * 2012-07-12 2014-02-03 Mitsubishi Heavy Industries Printing & Packaging Machinery Ltd Printing machine, printing method, and printing computer program

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009234089A (en) 2008-03-27 2009-10-15 Mitsubishi Heavy Ind Ltd Printing target color setting method and apparatus, and pattern color tone controlling method and apparatus
JP5535525B2 (en) * 2009-06-05 2014-07-02 三菱重工印刷紙工機械株式会社 Colorimetric value conversion method and device for traveling printed matter, print control method and device, and print state determination method and device

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1629978A3 (en) * 2004-08-31 2009-05-27 Mitsubishi Heavy Industries, Ltd. Picture color tone controlling method and apparatus
EP1629978A2 (en) 2004-08-31 2006-03-01 Mitsubishi Heavy Industries, Ltd. Picture color tone controlling method and apparatus
EP1634704A1 (en) 2004-09-10 2006-03-15 Mitsubishi Heavy Industries, Ltd. Picture colour tone controlling method and apparatus
WO2006051903A1 (en) * 2004-11-15 2006-05-18 Mitsubishi Heavy Industries, Ltd. Pattern color tone control method and controller
US7755798B2 (en) 2004-11-15 2010-07-13 Mitsubishi Heavy Industries, Ltd Picture color tone controlling method and apparatus
US7755797B2 (en) 2004-11-19 2010-07-13 Mitsubishi Heavy Industries, Ltd. Picture color tone controlling method and apparatus
WO2006054521A1 (en) * 2004-11-19 2006-05-26 Mitsubishi Heavy Industries, Ltd. Pattern color tone control method and controller
US8194270B2 (en) 2005-06-30 2012-06-05 Mitsubishi Heavy Industries Printing & Packaging Machinery, Ltd. Printing control method and printing system
WO2007004585A1 (en) * 2005-06-30 2007-01-11 Mitsubishi Heavy Industries, Ltd. Printing control method and printing system
WO2007083798A1 (en) * 2006-01-20 2007-07-26 Mitsubishi Heavy Industries, Ltd. Picture tone controller of printer and picture tone control method
JP2007190853A (en) * 2006-01-20 2007-08-02 Mitsubishi Heavy Ind Ltd Equipment and method for controlling color tone of pattern for printing machine
EP1977899A1 (en) * 2006-01-20 2008-10-08 Mitsubishi Heavy Industries, Ltd. Picture tone controller of printer and picture tone control method
EP1977899A4 (en) * 2006-01-20 2011-01-05 Mitsubishi Heavy Ind Printing Picture tone controller of printer and picture tone control method
EP1983738A1 (en) * 2006-01-31 2008-10-22 Mitsubishi Heavy Industries, Ltd. Method and device for checking picture tone to be printed by printer before printing, plate-making method, and method and device for controlling printer picture tone
WO2007088888A1 (en) 2006-01-31 2007-08-09 Mitsubishi Heavy Industries, Ltd. Method and device for checking picture tone to be printed by printer before printing, plate-making method, and method and device for controlling printer picture tone
KR100978154B1 (en) * 2006-01-31 2010-08-25 미츠비시주코 인사츠시코키카이 가부시키가이샤 Method and device for checking picture tone to be printed by printer before printing, plate-making method, and method and device for controlling printer picture tone
EP1983738A4 (en) * 2006-01-31 2009-10-21 Mitsubishi Heavy Ind Ltd Method and device for checking picture tone to be printed by printer before printing, plate-making method, and method and device for controlling printer picture tone
WO2008007746A1 (en) 2006-07-12 2008-01-17 Mitsubishi Heavy Industries, Ltd. Printing simulation method and device, method and dvice for controlling pattern color tone of printer, and printer
WO2008026589A1 (en) * 2006-08-31 2008-03-06 Mitsubishi Heavy Industries, Ltd. Printer print evaluation information display device and print evaluation information display method
US8189233B2 (en) 2007-10-23 2012-05-29 Fujifilm Corporation Density calculating apparatus, density setting apparatus, density calculating program storage medium, and density setting program storage medium
US8189232B2 (en) 2007-10-23 2012-05-29 Fujifilm Corporation Density calculating apparatus, density setting apparatus, density calculating program storage medium, and density setting program storage medium
US8199368B2 (en) 2007-11-02 2012-06-12 Fujifilm Corporation Image data correcting apparatus, computer-readable image data correcting program storage medium, image data correcting method and printing system
EP2056584A2 (en) 2007-11-02 2009-05-06 Fujifilm Corporation Image data correcting apparatus, computer-readable image data correcting program storage medium, image data correcting method and printing system
JP4691116B2 (en) * 2008-01-21 2011-06-01 三菱重工印刷紙工機械株式会社 Method and apparatus for checking color tone before printing of printing press and plate making method
JP2008167463A (en) * 2008-01-21 2008-07-17 Mitsubishi Heavy Ind Ltd Method and apparatus for confirming color tone prior to printing in printing machine, and plate-making method
EP2111989A2 (en) 2008-04-24 2009-10-28 Mitsubishi Heavy Industries, Ltd. Ink print-through color value estimation method and apparatus, color value estimation method and apparatus taking ink print-though into consideration, target color setting method and apparatus taking ink print-through into consideration as well as controlling method and apparatus for printing press
JP2008312220A (en) * 2008-07-07 2008-12-25 Mitsubishi Heavy Ind Ltd Checking method and device of texture color of printing machine
JP2009006728A (en) * 2008-10-16 2009-01-15 Mitsubishi Heavy Ind Ltd Target color mixture halftone density setting method and device for printer, and pattern color tone control method and device for printer
JP2014018981A (en) * 2012-07-12 2014-02-03 Mitsubishi Heavy Industries Printing & Packaging Machinery Ltd Printing machine, printing method, and printing computer program
JP2013126770A (en) * 2013-03-11 2013-06-27 Mitsubishi Heavy Industries Printing & Packaging Machinery Ltd Apparatus and method for controlling picture color tone of printer

Also Published As

Publication number Publication date
JP3825427B2 (en) 2006-09-27

Similar Documents

Publication Publication Date Title
US9734570B2 (en) Color correct imaging
JP5972320B2 (en) Method and system for monitoring printed matter generated by a printing press and computer program
US5182721A (en) Process and apparatus for controlling the inking process in a printing machine
US4665496A (en) Process and apparatus for the evaluation of the printing quality of a printed product by an offset printing machine
US7123384B2 (en) Dot gain calibration method and apparatus
US6580524B1 (en) Method for profiling and calibrating a digitally controllable printing machine having a permanent printing plate
EP1149703B1 (en) Method of and device for managing print colors, and image data processing device
JP5733083B2 (en) Image processing apparatus and image processing system
EP1744884B1 (en) Method for determining colour values and/or density values, and printing device for implementing said method
US5068810A (en) Process for the determination of colorimetric differences between two screen pattern fields printed by a printing machine and process for the color control or ink regulation of the print of a printing machine
EP0255924B1 (en) Method and device for acting upon the inking of an inked surface in printing
EP1501280B1 (en) Digital printer
US5224421A (en) Method for color adjustment and control in a printing press
EP0324718B1 (en) Method and device for ink monitoring in a printing machine
EP1464493B1 (en) A printing press
CA2428040C (en) Spectral color control method
JP5857676B2 (en) Image processing apparatus and image processing system
US5967050A (en) Markless color control in a printing press
US5530656A (en) Method for controlling the ink feed of a printing machine for half-tone printing
DE10218068B4 (en) Method for creating color calibration curves
CA2709376C (en) Printing method, printed matter, and printing control device
US7307755B2 (en) Method for correcting unadjusted printing data on the basis of colormetrically measured reference sheet
US20060170996A1 (en) Color control of a web printing press utilizing intra-image color measurements
JP5858843B2 (en) Gray balance correction method for printing process
EP0442322A1 (en) Method for ink control and zonal presetting

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20040825

A871 Explanation of circumstances concerning accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A871

Effective date: 20050623

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050623

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050708

A975 Report on accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A971005

Effective date: 20050712

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20051017

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20051101

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20051228

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20060307

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20060501

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20060606

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20060629

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100707

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110707

Year of fee payment: 5

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110707

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120707

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130707

Year of fee payment: 7

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350