JP2010023281A - Color correcting method for ink-jet printer, ink-jet printer, and ink-jet printer system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color correcting method for an inkjet printer obtaining the same photographic result on the same input image in a plurality of ink-jet printers and making a color correction for this result easily according to the kind of paper. <P>SOLUTION: The color correcting method for the ink-jet printer includes a paper kind selecting step of selecting the kind of paper for printing by the ink-jet printer, a correction chart printing step of printing a correction chart of the selected kind of paper, and a color correction information registering step of selecting color correction information from the correction chart and registering the color correction information. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to color correction of an ink jet printer, and more particularly to correcting a difference in color (print color) caused by a solid difference (machine difference) between a plurality of ink jet printers.

  Conventional photographs have been prepared by a silver salt processing method using a processing solution such as a developing solution from the viewpoint of high image quality and durability. However, in the case of silver salt treatment, the waste liquid of the treatment liquid has been an environmental problem. Therefore, an ink jet printer that does not require development processing has been proposed.

  In this inkjet printer, there are individual differences (machine differences, variations) due to variations in processing accuracy of nozzles and liquid storage spaces, variations in drive mechanisms such as piezoelectric elements, variations in control circuits, etc., and the same image data is transferred to a plurality of inkjets. When printing photos with a printer, each photo was a different color. In particular, because the printing speed of inkjet printers is slow compared to the silver salt processing method, it is necessary to install multiple inkjet printers in stores where the number of photographic prints is large, and the color of photographic printing between multiple inkjet printers. (Print color) must be the same.

By the way, in an image forming system comprising a host computer connected via a network, a plurality of printers, and a scanner, the host computer includes a reference device setting unit and a relative color difference calculation unit, and a specific one of the printers. The printer is set as a reference device by the reference device setting means, the color chart data read by the scanner is received from the color charts output by the plurality of printers, and the color chart data of the reference device and the color chart of another printer are received. From the data, the relative color difference calculating means calculates the relative color difference between the reference device and the color chart of the other printer, and sends the calculated relative color difference data to each printer. LUT for conversion There is known an image forming system including an LUT correction amount calculation unit, wherein the LUT correction amount calculation unit calculates the LUT correction amount and corrects the LUT based on the relative color difference transmitted from the host computer. (See Patent Document 1).
JP 2006-19911 A

  However, in Patent Document 1, the color charts of a plurality of printers are printed and read with a scanner as color chart data, and the LUT is calculated using a difference from the other color chart data as a correction amount based on any color chart data. It is the structure which correct | amends. This LUT is used when converting RGB image data into CMYK data, and is not a configuration for directly correcting image data.

  In addition, there is a situation where printing is performed with another ink jet printer due to an apparatus down or out of ink in the middle of ordering a photographic print, so it is necessary to always maintain the same hue between a plurality of ink jet printers.

  Further, there are glossy paper, semi-glossy paper, matte paper, and the like as types of paper for inkjet printers, and the characteristics of the paper are different. Therefore, it is necessary to adjust the color for each type of paper.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to obtain the same photographic print result for the same input image in a plurality of ink jet printers and color correction for the same according to the type of paper. An object of the present invention is to provide an ink jet printer color correction method, an ink jet printer, and an ink jet printer system which can be easily performed.

In order to solve the above problems, a color correction method for an ink jet printer according to the present invention includes:
A paper type selection step for selecting a paper type for inkjet printer printing;
A correction chart printing step for printing the correction chart of the selected paper type;
A color correction information registration step of selecting color correction information from the correction chart and registering the color correction information.

  The effects of this configuration are as follows. After selecting the paper type for printing, print a correction chart for the selected paper type, select color correction information from the printed correction chart, and register the color correction information for each paper type. Easy color correction for inkjet printers. “Color correction information” includes, for example, an identifier and a number indicating the correction content. An operator selects color correction information from a correction chart. However, the operator is not limited to manual input when registering color correction information, and may be read by a scanner or a code reader. Manual input is preferable because there is no need to consider errors due to the reading device, but there is no concern for identification information such as numbers.

  In the present invention, after the color correction information is registered in the color correction information registration step, a confirmation chart printing step for printing a confirmation chart of the color correction information, a paper type that is the same as the paper type is selected, and the paper The method further comprises the steps of printing a type of correction chart, selecting color correction information from the correction chart so as to match the confirmation chart, and registering color correction information. In this configuration, when selecting color correction information from the correction chart so as to match the confirmation chart, in addition to color correction information registration processing in the same inkjet printer, registration of color correction information of another inkjet printer Processing.

In the case of registration processing of color correction information of another inkjet printer, after registration of color correction information by the color correction information registration step, a confirmation chart printing step for printing a reference chart of the color correction information;
In a second inkjet printer different from the first inkjet printer according to the confirmation chart, selecting the same paper type as the paper type and printing a correction chart of the paper type;
The step of selecting color correction information from the correction chart so as to match the confirmation chart and registering the color correction information in the second ink jet printer is provided.

  According to this configuration, after registration of the color correction information, a confirmation chart of the color correction information is printed, and in the second inkjet printer different from the first inkjet printer according to the confirmation chart, the paper type of the first inkjet printer Select the same paper type and print the correction chart for that paper type. Then, the color correction information can be selected from the correction chart so as to match the confirmation chart, and the color correction information can be registered in the second inkjet printer. Therefore, since the color correction information registered in the first inkjet printer can be easily registered as the reference chart (corresponding to the confirmation chart), the color correction information of the other inkjet printer can be easily registered. Inkjet printers can easily match photographic print colors.

  In the present invention, the color correction correction elements include color balance, density, and gradation, and the paper type selection step, correction chart printing step, and color correction registration step are executed for each correction element. Thus, a correction chart in which only the elements to be corrected are in the initial value state is constructed and printed.

  According to this configuration, the color correction includes the color balance, the density, and the gradation as correction elements, and the color correction information is registered in each of them, so that the color correction can be performed with high accuracy. The correction chart of each correction element maintains the state of a preset initial value. It is fixed as a group of initial reference values and relative values from these reference values, and these groups of reference values and relative values do not change before and after registration of color correction information. For example, before registration of the color correction information, the reference value is “0”, and after the color correction information is registered and “+1” is registered, the reference value is registered in the subsequent printing of the correction chart. The initial value set in advance is printed as it is as the correction chart. That is, if the correction chart is updated in accordance with the registered color correction information, the first reference becomes unclear, which is not preferable. Therefore, the correction chart is configured to maintain a preset initial value state. When the color correction information of the first correction element (for example, color balance) is registered, the color correction based on the color correction information is reflected, and the correction chart of the next second correction element (for example, density) is printed. The Further, even if all three types of color correction elements are performed, according to the present invention, color correction can be performed by a simple method, which is very effective in a store where a plurality of inkjet printers are installed.

Another aspect of the present invention is an inkjet printer,
A paper type setting unit that accepts input of a paper type for inkjet printer printing and sets the paper type;
A correction chart printing unit that accepts an instruction to print the correction chart of the set paper type and prints the correction chart;
A color correction information registration unit that receives input of specific color correction information included in the correction chart and registers the color correction information;
A color correction unit for correcting RGB image data based on the color correction information registered in the color correction information registration unit;
A RIP processing unit for RIP processing the RGB image data corrected by the color correction unit;
And a printing unit that performs printing processing based on gray scale data for each CMYK obtained by the RIP processing unit.

  According to this configuration, an input of a paper type for inkjet printer printing is received, the paper type is set, an instruction to print a correction chart of the set paper type is received, the correction chart is printed, and the correction chart is displayed. It is possible to receive input of specific color correction information included, register the color correction information, and construct these functions with a simple user interface. Since the RGB image data is corrected based on the registered color correction information, the RGB image data can be corrected directly. Further, the corrected RGB image data can be subjected to RIP processing, and printing processing can be performed based on gray scale data for each CMYK obtained by the RIP processing. Therefore, since color correction can be easily performed according to the type of paper and color correction can be performed on RGB image data, it is not necessary to mix color correction processing during RIP processing, and conventional hardware RIP means, Software RIP means can be used. In addition, the color correction unit may have a hardware configuration of a dedicated circuit, or may have a cooperative configuration with software and hardware such as a CPU. The paper type setting unit, the correction chart printing unit, and the color correction information registration unit that function as the color adjustment means described above have a simple user interface configuration, which includes software, hardware such as a CPU and a memory, and the like. The

  In the present invention, the color correction correction element includes color balance, density, and gradation. For each correction element, a paper type setting unit, a correction chart printing unit, and a color correction registration unit are provided for correction. It is preferable that a correction chart in which only the elements to be performed are in the initial value state is configured and printed. This effect is as described above.

  In the present invention, the color correction information registration unit further includes a confirmation chart printing unit that prints a confirmation chart of the color correction information after the color correction information is registered, and the color correction information registration unit registers the color correction information. In this case, it is preferable that color correction information is selected from the correction chart so as to match the confirmation chart. According to this configuration, for example, when color correction processing such as when the print head is replaced or when recovering from a failure is performed, color correction information is registered based on a pre-printed confirmation chart. can do.

Another aspect of the present invention is an inkjet printer system in which a plurality of inkjet printers and a controller are network-connected,
The controller is
An image data storage unit for storing RGB image data relating to photo processing;
A communication unit that transmits the RGB image data to the respective inkjet printers,
Each of the ink jet printers
A paper type setting unit that accepts input of a paper type for inkjet printer printing and sets the paper type;
A correction chart printing unit that accepts an instruction to print the correction chart of the set paper type and prints the correction chart;
A color correction information registration unit that receives input of specific color correction information included in the correction chart and registers the color correction information;
A color correction information storage unit for storing the registered color correction information;
A confirmation chart printing unit that accepts an instruction to print the confirmation chart of the color correction information and prints the confirmation chart;
A communication unit for receiving RGB image data related to photo processing from the controller;
A color correction unit that acquires the stored color correction information and corrects the received RGB image data based on the color correction information;
A RIP processing unit for RIP processing the RGB image data corrected by the color correction unit;
A printing unit that performs printing processing based on grayscale data for each CMYK obtained by the RIP processing unit,
Specific color correction information is input from the correction chart of the second inkjet printer so as to match the confirmation chart of the first inkjet printer.

  According to this configuration, a plurality of inkjet printers and a controller for controlling the inkjet printer with respect to photo processing are connected to the network. The controller stores RGB image data related to photographic processing in an image data storage unit, and when executing photographic processing, can transmit RGB image data to an inkjet printer related to photographic processing in units of orders. The controller has a function of selecting an inkjet printer for photo processing. The controller may be connected to a reception terminal having a function of receiving image data, a storage medium reading and recording apparatus, another thermal transfer printer, a sublimation printer, a silver salt printer, and the like. In addition, the controller converts the RGB image data into a thumbnail image and displays it on the monitor. While looking at the monitor screen, various corrections (red-eye correction, γ correction, sharpness correction, density correction, etc.) for each frame image, the number of sheets And a function (a pre-judge function to be described later) capable of setting the size.

  Each inkjet printer receives an input of a paper type for printing, sets the paper type, receives an instruction to print a correction chart for the set paper type, prints the correction chart, and displays the correction chart on the correction chart. It is possible to receive input of specific color correction information included, and register and save the color correction information. Then, an instruction to print the color correction information confirmation chart can be received, and the confirmation chart can be printed. Then, specific color correction information is input from the correction chart of the second inkjet printer so as to match the confirmation chart of the first inkjet printer.

  Each inkjet printer acquires color correction information from the color correction information storage unit, corrects the RGB image data related to the photo printing process based on the acquired color correction information, and outputs the corrected RGB image data. RIP processing can be performed, and printing processing can be performed based on grayscale data for each CMYK obtained by the RIP processing. The paper type setting unit, the correction chart printing unit, the color correction information registration unit, and the confirmation chart printing unit that function as the color adjustment unit described above have a simple user interface configuration, such as hardware such as software, CPU, and memory. Consists of.

  Therefore, since the color correction information of the other ink jet printer can be easily registered based on the confirmation chart of the color correction information registered in the first ink jet printer, the photo print of the first ink jet printer and the photo print of the other ink jet printer can be registered. The colors of can be easily matched.

  In the present invention, the color correction correction element includes color balance, density, and gradation. For each correction element, a paper type setting unit, a correction chart printing unit, and a color correction registration unit are provided for correction. It is preferable that a correction chart in which only the elements to be performed are in the initial value state is configured and printed. This effect is as described above.

Another aspect of the present invention is an inkjet printer system in which a plurality of inkjet printers and a controller are network-connected,
The controller is
An image data storage unit for storing RGB image data relating to photo processing;
A communication unit for transmitting the RGB image data to the respective inkjet printers;
Color adjustment means for setting color correction information for each of a plurality of inkjet printers,
The color adjusting means includes
A color adjustment target selection unit that selects an inkjet printer that performs color adjustment from a plurality of inkjet printers;
A paper type setting unit that accepts input of a paper type for inkjet printer printing and sets the paper type;
A correction chart printing unit that accepts an instruction to print the correction chart of the set paper type and prints the correction chart;
A color correction information registration unit that receives input of specific color correction information included in the correction chart and registers the color correction information;
A color correction information storage unit for storing the registered color correction information and the identification information of the inkjet printer in association with each other;
A check chart printing unit that receives an instruction to print the check chart of the color correction information and prints the check chart;
The stored color correction information is transmitted to the inkjet printer related to the color correction information by the communication unit,
Each of the ink jet printers
A communication unit for receiving RGB image data related to photo processing from the controller;
A color correction information storage unit that stores color correction information received from the controller by the communication unit;
A color correction unit that acquires the stored color correction information and corrects the received RGB image data based on the color correction information;
A RIP processing unit for RIP processing the RGB image data corrected by the color correction unit;
A printing unit that performs printing processing based on grayscale data for each CMYK obtained by the RIP processing unit,
Specific color correction information is input from the correction chart of the second inkjet printer so as to match the confirmation chart of the first inkjet printer.

  According to this configuration, the color adjustment means is provided in the controller, and the controller can perform color adjustment of a plurality of inkjet printers. The color correction information registered for each ink jet printer is transmitted to each ink jet printer and stored therein. Therefore, it is not necessary to provide color adjustment means for each ink jet printer.

  In the present invention, the color correction correction element includes color balance, density, and gradation. For each correction element, a paper type setting unit, a correction chart printing unit, and a color correction registration unit are provided for correction. It is preferable that a correction chart in which only the elements to be performed are in the initial value state is configured and printed. This effect is as described above.

  The types of paper include surface quality types (for example, matte paper, glossy paper, semi-glossy paper, etc.), and further classified according to differences in manufacturers and manufacturing lots.

  In the present invention, an “order” is an order unit when a photographic print is created. “One order” refers to a group of image data related to a print order for one or more films, one or more recording media, and one or more image data folders. The concept of one order can be set as appropriate by the operator and the orderer. The same applies hereinafter.

  The ink jet printer system according to the present invention will be described roughly according to the first and second embodiments. In addition, since the component which is the same code | symbol has the same function, description may be abbreviate | omitted.

(Embodiment 1)
FIG. 1 is a basic configuration diagram of an inkjet printer system according to the first embodiment. The first and second ink jet printers 10a and 10b have the same components. The first and second inkjet printers 10a and 10b are configured to be connected to the controller 30 via a network. Note that the number of inkjet printers is not limited to two, and two or more may be connected.

(controller)
First, the controller 30 will be described. The controller 30 basically has a function of managing and executing a photo print process for an ink jet printer, and includes an information processing apparatus and a software program for each process. The communication unit 31 is a transmission / reception unit for various data, and is configured by a known communication unit. The controller 30 is connected to a film scanner 40 that is a function for reading a developed negative film via a network, and digital image data (RGB image data) read by the film scanner 40 is transmitted to the controller 30 and stored in the data storage unit 32. Is done. The data storage unit 32 is a storage device that stores image data, order information, and the like. Order information (number of sheets, size, etc.) corresponding to this image data may be set by pre-judge processing, which will be described later, or the initial number may be set to 1 and the size may be set to L size. The reception terminal 50 on the network reads image data (RGB image data) from various media and transmits it to the controller 30 together with order information (information including the number of sheets and size). This image data is associated with the order information. And stored in the data storage unit 32.

  The reception terminal 50 is exemplified by an image processing apparatus for an operator, a reception terminal for an orderer installed in a store, a network reception terminal, and the like. The number of installed image processing apparatuses, orderer reception terminals, and network reception terminals is not limited to one each, and a plurality of units can be installed as necessary.

  The reception terminal 50 is installed at, for example, a store and can receive image data stored in a recording medium of a digital camera or other recording media. The reception terminal 50 is mainly operated by a customer, and may insert a recording medium brought by the customer to select image data to be created as a photo print or set the number of prints. it can. The net reception terminal has a function of receiving an online print order via the Internet. In addition to the function of reading image data from the recording medium, the recording medium reading device 60 has a function of writing data such as image data and order information transmitted from the controller 30 or an image forming apparatus (including an ink jet printer) to the recording medium. have.

The controller 30 also includes an order management unit 34 that manages and controls order information including information such as image data and order data related to photo print orders. The order management unit 34 can set printer settings, print order, and the like regarding print processing. In addition, regarding the print order, it has a function of displaying order information on the monitor and changing the print order.

The print condition setting unit 35 is a function that performs pre-judge processing on the image data of the order information, displays a predetermined number of frame images on the monitor, and sets print conditions for each frame image. For example, arbitrary order information stored in the data storage unit 32 is selected, a predetermined number of frame images are displayed on the monitor, and the number of prints, print size, image correction data, etc. are displayed for the displayed frame images. Set the print conditions.

  In the present invention, the pre-judgment process determines whether or not a photographic print having an appropriate image quality is created before creating a photographic print based on the image data. The operator makes a judgment on the image data. Functions are provided primarily by software. The pre-judge process is not necessarily performed, and the print process can be performed without the pre-judge process.

  The print condition setting unit 35 provides a function of inputting correction data for correcting color and density, for example, and the input of the correction data is set as necessary. Examples of other correction data settings include special correction settings such as red-eye correction and backlight correction.

  As the setting of the number of prints, 1 is set by default for the image data acquired from the film scanner 40, but it can be changed by an input operation of the operator.

  The print image data creation unit 36 performs image processing on the corresponding image data based on the print condition correction data set by the print condition setting unit 35, the print size, and the like, and print image data (RGB image data). Create). The print image data creation unit 36 is exemplified by a configuration realized by a cooperative action of a computer program and hardware resources such as a CPU and a memory, and a configuration of an image processing board configured by a dedicated circuit. The image processing board includes, for example, an input memory, an image processing circuit unit, and a development memory, and predetermined image processing is performed in the image processing circuit unit. Specifically, color / density correction based on correction data such as pre-judge processing, data expansion / contraction processing according to a set print size, and the like. The image data for printing created here is transmitted by the communication unit 31 to the first and second inkjet printers 10a and 10b. The controller 30 also includes a monitor 39 as various operation screens and input means 38 such as a keyboard and a mouse for various inputs.

(Inkjet printer)
The main functions of the first and second inkjet printers 10a and 10b will be described. The first and second inkjet prints 10a and 10b include a communication unit 11 for various data communication. The communication unit 11 receives image data for printing from the controller 30 and stores it in a memory (not shown). The first and second ink jet printers 10a and 10b include information processing apparatuses. The information processing apparatus may be incorporated in the ink jet printer or may be configured to be separated as a separate body. A personal computer is exemplified as the information processing apparatus.

  The color correction unit 12 corrects the printing image data of the RGB image data related to the photo print processing based on the color correction information (for example, gamma correction value). Here, the color correction unit 12 is configured by a cooperative action of a software program and hardware resources (CPU, memory, etc.) of the information processing apparatus described above.

  The RIP processing unit 13 is a function that executes RIP processing. The RIP processing unit 13 performs RIP processing on the printing image data of the RGB image data related to the photo print processing, and develops the grayscale data for each CMYK. Here, the RIP processing unit 13 is configured by a cooperative action of a software program and hardware resources (CPU, memory, etc.) of the information processing apparatus described above.

  The printing unit 14 performs printing processing based on the gray scale data for each CMYK. The printing unit 14 includes CMYK print heads. In the printing unit 14, the print head scans the paper that has been intermittently conveyed in the main scanning direction, and ink is ejected from the ink ejection nozzles of each color and adheres to the surface of the paper during this scanning. By repeating this intermittent conveyance, main scanning operation, and ink ejection operation, an image is formed in the print area of the paper. From the data for image formation (gray scale data for each CMYK), the ejection amount and ejection coordinates from each ink ejection nozzle are calculated. The ink discharge nozzle is controlled based on the discharge amount and discharge coordinates. Examples of the ink ejection method include a general piezo method in which ink is ejected from an ink ejection nozzle communicating with the pressure chamber by changing the volume of the pressure chamber filled with ink by a piezo element. These control means may be constituted by hardware such as a CPU, a memory, and a bus, and program software describing various control procedures, or may be constituted by a combination of a dedicated circuit, firmware, and the like.

  The print head may have a configuration in which a head unit provided with a large number of ink discharge nozzles on the bottom surface thereof is arranged in two stages in the sub-scanning direction, or may have a configuration of one stage or three or more stages. For example, the head unit is composed of seven nozzle arrays, and in each nozzle array, the ink discharge nozzles are arranged in a row in the sub-scanning direction. Thereby, each head unit can form a color image by itself.

  The image-formed paper is conveyed to a cutting unit (not shown), and the cutting unit is a rotary blade, and cuts the paper by moving in the paper width direction. Next, the paper cut into a predetermined size is printed with information such as an identification number, a frame number, and a date on the back side of the paper by the back printing means. This back printing process is an arbitrary process. Next, the image forming surface of the paper is dried by the drying means on the downstream side of the conveyance. After drying, the paper is sorted by the sorting means 15 and discharged to a discharge tray.

  The input means 17 can be composed of a keyboard, a touch panel, a mouse, and the like, and is used for various inputs for operations and settings. The monitor 16 can be composed of a liquid crystal monitor or the like, and can display various operation screens and various setting screens.

  Next, the characteristic configuration of the present invention will be described. In the ink jet printer, various processing functions are initially set at the time of shipment. Color adjustment is also set by default. However, even if the initial settings are made due to individual differences (machine differences) such as the print head of the ink jet printer, the print colors of the photographs printed by the individual ink jet printers are different. Therefore, the present invention aims to perform color correction in consideration of individual differences (machine differences) of ink jet printers, and is configured to be able to perform color correction for each paper type. Further, it is preferable to correct each of color balance, density, and gradation as correction elements for color correction.

  As a color adjustment means, a user interface that allows easy input operation is constructed. In FIG. 1, the color adjustment means of the first inkjet printer 10a includes a first paper type setting unit 101a, a first correction chart storage unit 102a, a first correction chart printing unit 103a, a first color correction information registration unit 104a, The color correction information storage unit 105a and the first confirmation chart printing unit 106a are included. The color adjustment means of the second inkjet printer 10b includes a second paper type setting unit 101b, a second correction chart storage unit 102b, a second correction chart printing unit 103b, a second color correction information registration unit 104b, and a second color. The correction information storage unit 105b and the second confirmation chart printing unit 106b are configured. The color adjustment means is realized by a cooperative action of a software program and CPU and hardware such as a memory. The following description will be made with reference to the color correction method flowcharts of FIGS. 2 and 3 and the correction screens and correction charts of FIGS.

  First, the information processing apparatus of the first inkjet printer 10a is started up and an application of color adjustment means is started. Next, a color balance correction screen 400 as shown in FIG. 5 is displayed on the monitor 16 (step S1).

  Next, the paper type 401 subject to color correction is selected (step S2). Here, glossy paper is selected. This process depends on the function of the first paper type setting unit 101a.

  Next, a color balance correction chart is printed (step S3). Specifically, the correction chart print button 402 is instructed, and the image data of the color balance correction chart relating to the glossy paper stored in the first correction chart storage unit 102a is read out. As will be described later, the read image data is adjusted in color balance, RIP processed, and printed. When “Apply CMS” 403 is checked, a correction chart subjected to CMS correction (color management correction) is printed. The above processing is the function of the first correction chart printing unit 103a.

  An example of two types of color balance correction charts is shown in FIG. In the correction charts of FIGS. 7A and 7B, images are actually printed in a plurality of frames. The image to be printed may be a preset image or may be configured so that it can be selected from a plurality of images at the time of printing. The image may be a person or a landscape, and can be arbitrarily set according to a store request, a maintenance request, or the like. In the figure, Y represents yellow, M represents magenta, C represents cyan, B represents blue, G represents green, and R represents red. “LV” indicates a correction level, “N” is an initial value, and a level range is set with N in the middle. Here, the range is up to LV4, but the range may be expanded or narrowed further. The balance correction is performed by gamma correction. The greater the level value, the greater the gamma value. The relationship between “N” and “LV” in the correction chart is not changed even if the color correction registration process is performed, and remains as it is.

  The operator selects one image determined to be appropriate from the correction chart images. For example, if the selected image is a hatched image in FIG. 7B, “LV2” of “YR” is input as a correction value (corresponding to correction information) (step S4). As a method for inputting the correction value, the correction number input button 406 is designated in FIG. 5, and the correction value can be directly input on the correction number input screen shown in FIG. As shown in FIG. 6, “YR” is input in the direction 4061 and “2” is input in the LV 4062. Then, an “OK button” is instructed and reflected in the correction value.

  As another correction value input, for example, as shown in FIG. 5, the “cyan-red” column 407 a can be set to “+2”, and the “yellow-blue” column 407 b can be set to “−2”. . Further, the bar 408a can be moved to the red 2 position, and the bar 408b can be moved to the yellow 2 position. These input operations can be easily performed with a mouse or a numeric keypad.

  Next, the input correction value (color correction information) is registered (step S5). When the registration button 409 is instructed, the correction value (color correction information) is stored in the first color correction information storage unit 105a. The correction value is stored as gamma correction value information. The above processing is the function of the first color correction information registration unit 104a.

  When printing the registered color correction information, a confirmation chart can be printed in step S6. This confirmation chart can be used, for example, for reconfirmation of the selected image, can be used as a reference for color correction of another second inkjet printer 10b, and can be used for color correction after replacement of the print head. It can be used as a standard for Specifically, the confirmation chart print button 404 shown in FIG. 5 is instructed, the color correction information (gamma correction value) and the chart image are read from the first color correction information storage unit 105a, and the color correction unit 12 The chart image is gamma corrected based on the color correction information (gamma correction value). The chart image (RGB image data) that has been gamma-corrected is subjected to RIP processing by the RIP processing unit 13 and is subjected to print processing by the printing unit 14 based on the data obtained by the RIP processing. When “Apply CMS” 405 is checked, a confirmation chart with CMS correction (color management correction) is printed.

  FIG. 14 shows an example of a confirmation chart. A broken line frame 1401 is a density chart, and a broken line frame 1402 indicates an image, and is printed in the order of a monochrome image, its enlarged monochrome image, and its enlarged color image from the left in the figure. A broken line frame 1403 is a gradation chart. The confirmation chart is not limited to this display form. The above processing is the function of the first confirmation chart printing unit 106a. By the way, the process in step S6 is omitted, and settings with other color correction elements (density and gradation) can be executed. When ending the color balance color correction process, the end button is instructed to close the color balance color correction screen.

  Next, density color correction will be described. As shown in FIG. 8, a density correction screen 800 is displayed (step S11).

  Next, the paper type 801 subject to color correction is selected (step S12). Here, the same glossy paper as the color correction target for color balance is selected. This process depends on the function of the first paper type setting unit 101a.

  Next, a density correction chart is printed (step S13). Specifically, the correction chart print button 802 is instructed, and the density correction chart image data relating to the glossy paper stored in the first correction chart storage unit 102a is read out. The read image data is subjected to density adjustment, RIP processing, and printing as described later. When “Apply CMS” 803 is checked, a correction chart subjected to CMS correction (color management correction) is printed. The above processing is the function of the first correction chart printing unit 103a. When a correction value is newly registered by registering color balance color correction information, a density correction chart reflecting the color balance color correction (gamma corrected) is printed.

  An example of the density correction chart is shown in FIG. In the density correction chart of FIG. 10, an image is actually printed in a plurality of frames. The image to be printed may be a preset image or may be configured so that it can be selected from a plurality of images at the time of printing. The image may be a person or landscape. It may be an image used in a color balance correction chart. In the drawing, it is shown that the density of the image arranged in the “dark” direction is darker and the density is the darker the image arranged in the “thin” direction. “LV” indicates a correction level, “N” is an initial value, and a level range is set with N in the middle. Here, the range is up to level 4 (LV4), but the range may be expanded or narrowed further. Density correction is performed by gamma correction. The greater the level value, the greater the gamma value. The relationship between “N” and “LV” in the correction chart is not changed even if the color correction registration process is performed, and remains as it is.

  The operator selects one image determined to be appropriate from the correction chart images. If the selected image is, for example, the hatched image in FIG. 10, “light” “LV1” is input as a correction value (corresponding to correction information) (step S14). As a method for inputting the correction value, the correction number input button 806 can be designated in FIG. 8, and the correction value can be directly input on the correction number input screen shown in FIG. As shown in FIG. 9, “thin” is input in the direction 8061 and “1” is input in the LV8062. Then, an “OK button” is instructed and reflected in the correction value.

  As another correction value input, for example, as shown in FIG. 8, a “dark-light” field 807 can be set to “+1”. Further, the bar 808 can be moved to the “1” position in the “thin” direction. These input operations can be easily performed with a mouse or a numeric keypad.

  Next, the input correction value (color correction information) is registered (step S15). When the registration button 809 is instructed, the density correction value (color correction information) is stored in the first color correction information storage unit 105a. The correction value is stored as gamma correction value information. The above processing is the function of the first color correction information registration unit 104a.

  When printing the color correction information of the registered density, the confirmation chart can be printed in step S16. This confirmation chart can be used, for example, for reconfirmation of the selected image, can be used as a reference for color correction of another second inkjet printer 10b, and can be used for color correction after replacement of the print head. It can be used as a standard for Specifically, the confirmation chart print button 804 shown in FIG. 8 is instructed, the color correction information (gamma correction value) and the chart image are read from the first color correction information storage unit 105a, and the color correction unit 12 The chart image is gamma corrected based on the color correction information (gamma correction value). The chart image (RGB image data) that has been gamma-corrected is subjected to RIP processing by the RIP processing unit 13 and is subjected to print processing by the printing unit 14 based on the data obtained by the RIP processing. When “Apply CMS” 805 is checked, a confirmation chart with CMS correction (color management correction) is printed.

  As an example of the density confirmation chart, the chart of FIG. 10 is illustrated, and the “LV1” image in the “light” direction selected above is arranged at the position of level N (initial value), and the other images are: The new N images may be arranged with gamma correction as a reference. Alternatively, as an example of the confirmation chart, a chart illustrated in FIG. 14 is illustrated, and an image of a broken line frame 1402 can be used as a reference image of density. The above processing is the function of the first confirmation chart printing unit 106a. By the way, the processing in step S16 is omitted, and settings with other color correction elements (gradations) can be executed. When ending the density color correction process, an end button is designated to close the density color correction screen.

  Next, tone color correction will be described. As shown in FIG. 11, a gradation correction screen 1100 is displayed (step S21).

  Next, the paper type 1101 for color correction is selected (step S22). Here, glossy paper similar to the color balance and density color correction target is selected. This process depends on the function of the first paper type setting unit 101a.

  Next, a gradation correction chart is printed (step S23). Specifically, first, “brightness” 1102 is input. Here, for example, the shadow is “25%”, the intermediate color is “50%”, and the highlight is “75%”. The numerical input of “brightness” can be configured such that the numerical value is automatically selected when the type of paper is selected. Next, numerical values of saturation (1) 1103 and saturation (P2) 1104 are input for two types of patterns to be printed on the correction chart. In FIG. 13, the left ring chart indicates saturation (P1), and the right ring chart indicates saturation (P2). Next, the input parameter determination button 1108 is instructed to determine input values of “brightness” and “saturation”.

  Next, the correction chart print button 1106 is instructed, and the correction chart image of the gradation based on the determined “brightness” and “saturation” is subjected to RIP processing and printed. When “Apply CMS” 1107 is checked, a correction chart subjected to CMS correction (color management correction) is printed. The above processing is the function of the first correction chart printing unit 103a. When correction values are newly registered by registering color correction information of color balance and / or density, a correction chart of a gradation in which those color corrections are reflected (gamma corrected) is printed.

  An example of a gradation correction chart is shown in FIG. The gradation correction chart of FIG. 13 is arranged in a ring shape for each of two types of saturation. “YB”, “MG”, and “CR” are opposed to each other so that the complementary color relationship is established. The gradation correction chart pattern is defined by H (hue) S (saturation) V (brightness). The ring center is a gray image with the specified brightness. The ring-arranged image is configured in increments of 30 degrees with the specified saturation. Individual image data is saved as RGB image data by converting HSV into RGB. In the figure, numerical values in parentheses, for example, (1) to (24) correspond to correction numbers. Three types of correction charts are printed: shadow, intermediate color, and highlight. Even if the color correction registration process is performed, the relationship between the individual images in the gradation correction chart remains unchanged.

  The operator selects one image determined to be appropriate from the image of the gradation correction chart (for example, a shadow chart). For example, if the selected image is a hatched image in FIG. 13, the correction number (17) is input as a correction value (corresponding to correction information) (step S24). As an input method of the correction value, the correction number input button 1111 can be designated in FIG. 11, and the correction number (17) can be directly input on the correction number input screen shown in FIG. Similarly, correction numbers can be input for other intermediate colors and highlights. Then, an “OK button” is instructed and reflected in the correction value.

  Further, as other correction value input, for example, as shown in FIG. 11, the respective numerical values of shadow, intermediate color, and highlight in the column “R (red)” 1113 can be input. Further, the “G (green)” column 1114 and the “B (blue)” column 1115 can be similarly input. Further, it is possible to configure the color correction information by instructing the measurement button 1112 and starting the colorimeter linked to the measurement button 1112 to read the correction chart. The above input operation can be easily performed with a mouse or a numeric keypad.

  Next, the input correction value (color correction information) is registered (step S25). When the registration button 1116 is instructed, the gradation correction value (color correction information) is stored in the first color correction information storage unit 105a. The above processing is the function of the first color correction information registration unit 104a. Further, as shown in the lower right part of the gradation correction screen in FIG. 11, the input gradation correction values are displayed in a graph.

  When printing the color correction information of the registered gradation, the confirmation chart can be printed in step S26. This confirmation chart can be used, for example, for reconfirmation of the input correction number, can be used as a reference for color correction of the other second inkjet printer 10b, and can be used after the print head has been replaced. It can be used as a reference for correction. Specifically, the confirmation chart print button 1109 shown in FIG. 11 is instructed, the color correction information is read from the first color correction information storage unit 105a, and the printing unit 14 performs printing processing based on the color correction information. When “Apply CMS” 1110 is checked, a confirmation chart with CMS correction (color management correction) is printed.

  As an example of the gradation confirmation chart, the chart of FIG. 13 is illustrated, and the image of the correction number (17) selected above is arranged at the position of the ring center, and the other image is the new ring center image. May be calculated and arranged on the basis of. Alternatively, the chart shown in FIG. 14 is illustrated as an example of the confirmation chart, and the image of the broken line frame 1401 or the image of the broken line frame 1403 can be used as a reference image for gradation. The above processing is the function of the first confirmation chart printing unit 106a. When finishing the tone color correction process, the finish button is instructed to close the fine color correction screen.

  In the above color correction processing flow, the color balance, density, and gradation are performed in this order. However, the order is not particularly limited to this order, and any order may be used. May be executed.

  Next, color correction of the second inkjet printer 10b will be described. In order to match the color with the first inkjet printer 10a, the confirmation chart printed above is used as a reference chart.

  First, the information processing apparatus of the second inkjet printer 10b is started up and an application of the color adjustment unit is activated. Next, a color balance correction screen as shown in FIG. 5 is displayed on the monitor 16 (step S31).

  Next, the paper type 401 subject to color correction is selected (step S32). As with the first inkjet printer 10a, glossy paper is selected here. This process depends on the function of the second paper type setting unit 101b.

  Next, a color balance correction chart is printed (step S33). The specific processing procedure is the same as described above. The above processing is the function of the second correction chart printing unit 103b.

  The operator selects one image from the correction chart image so as to match the reference chart (the above-described confirmation chart). The correction value of the selected image is input (step S34).

  Next, the input correction value (color correction information) is registered (step S35). The registration button 409 is instructed, and the correction value (color correction information) is stored in the second color correction information storage unit 105b. The correction value is stored as gamma correction value information. The above processing is the function of the second color correction information registration unit 104b.

  When printing the registered color correction information, a confirmation chart can be printed in step S36. This confirmation chart can be used, for example, for reconfirmation of a selected image, can be used as a reference for color correction of other inkjet printers, and can also be used as a reference for color correction after replacement of a print head. Can be used. The specific processing procedure is the same as described above. The above processing is the function of the second confirmation chart printing unit 106b. By the way, the processing in step S36 is omitted, and settings with other color correction elements (density and gradation) can be executed. When ending the color balance color correction process, the end button is instructed to close the color balance color correction screen.

  Next, as shown in FIG. 8, a density correction screen is displayed (step S41). Next, the paper type 801 subject to color correction is selected (step S42). Here, the same glossy paper as the color correction target for color balance is selected. This process depends on the function of the second paper type setting unit 101b.

  Next, a density correction chart is printed (step S43). The specific processing procedure is the same as described above. The above processing is the function of the second correction chart printing unit 103b.

  The operator selects one image from the correction chart image so as to match the reference chart. A correction value (corresponding to correction information) of the selected image is input (step S44).

  Next, the input correction value (color correction information) is registered (step S45). The registration button 809 is instructed to store the density correction value (color correction information) in the second color correction information storage unit 105b. The correction value is stored as gamma correction value information. The above processing is the function of the second color correction information registration unit 104b.

  When printing the color correction information of the registered density, a confirmation chart can be printed in step S46. This confirmation chart can be used, for example, for reconfirmation of a selected image, can be used as a reference for color correction of other inkjet printers, and can also be used as a reference for color correction after replacement of a print head. Can be used. The specific processing procedure is the same as described above. The above processing is the function of the second confirmation chart printing unit 106b. By the way, the processing in step S46 is omitted, and settings with other color correction elements (gradations) can be executed. When ending the density color correction process, an end button is designated to close the density color correction screen.

  Next, as shown in FIG. 11, a gradation correction screen is displayed (step S51). Next, the paper type 1101 for color correction is selected (step S52). Here, glossy paper similar to the color balance and density color correction target is selected. This process depends on the function of the second paper type setting unit 101b.

  Next, a gradation correction chart is printed (step S53). The specific processing procedure is the same as described above. The above processing is the function of the second correction chart printing unit 103b.

  The operator selects one image from the gradation correction chart image so as to match the reference chart. A correction number is input as a correction value (corresponding to correction information) of the selected image (step S54).

  Next, the input correction value (color correction information) is registered (step S55). The registration button 1116 is instructed to store the gradation correction value (color correction information) in the second color correction information storage unit 105b. The above processing is the function of the second color correction information registration unit 104b.

  When printing the registered gradation color correction information, the confirmation chart can be printed in step S56. This confirmation chart can be used, for example, for reconfirmation of the input correction number, can also be used as a color correction reference for other inkjet printers, and can be used as a reference for color correction after print head replacement. Can be used as The specific processing procedure is the same as described above. The above processing is the function of the second confirmation chart printing unit 106b. When finishing the gradation color correction process, the end button is designated to close the gradation color correction screen.

  In the above color correction processing flow, the color balance, density, and gradation are performed in this order. However, the order is not particularly limited to this order, and any order may be used. May be executed.

  With the above color correction process, the color adjustment of the second inkjet printer 10b can be performed with a simple operation so that the same print color as that of the first inkjet printer 10a is obtained.

  When photo printing is executed in the first inkjet printer 10a, the color correction information stored in the first color correction information storage unit 105a is acquired, and based on the color correction information, RGB image data to be printed is converted into color. Correction is performed by the correction unit 12. Next, the RIP processing unit 13 performs RIP processing on the corrected RGB image data. Then, the printing unit 14 performs printing processing based on the gray scale data for each CMYK obtained by the RIP processing. The photo printing process of the second inkjet printer 10b is the same processing procedure.

(Embodiment 2)
Below, the structure provided with the function of the color adjustment means in the controller 30 side is demonstrated. As illustrated in FIG. 4, the controller 30 serves as a color adjustment unit, such as a color adjustment target selection unit 300, a paper type setting unit 301, a correction chart storage unit 302, a correction chart printing unit 303, a color correction information registration unit 304, and color correction. An information storage unit 305 and a confirmation chart printing unit 306 are included. The color adjusting unit functions in the same manner as that of the first embodiment. Then, the color correction of the second inkjet printer 10b is executed so as to match the confirmation chart of the first inkjet printer 10a.

  Specifically, the color adjustment target selection unit 300 selects an inkjet printer to be color corrected, then a paper type is selected, a correction chart is printed, an image is selected from the correction chart, and color correction information of the image is selected. Is entered and registered. The identification information of the inkjet printer and the registered color correction information are stored in association with each other. Then, the color correction information is transmitted to the ink jet printer, and the color correction information is stored in the color correction information storage unit 18. In the case of executing photo printing, the stored color correction information is acquired, and based on the color correction information, the RGB image data to be printed is corrected by the color correction unit 12, and then the corrected RGB image data is converted into RIP. The processing unit 13 performs RIP processing. Then, the printing unit 14 performs printing processing based on the gray scale data for each CMYK obtained by the RIP processing.

(Embodiment 3)
In the first and second embodiments, the color correction information is registered in the first ink jet printer, the confirmation chart is printed, and the first ink jet printer is confirmed in the color correction of another second ink jet printer. The configuration is based on the chart. In the third embodiment, when the color correction information is registered in the first ink jet printer, the confirmation chart is printed, and the color correction information of the first ink jet printer is registered again, the confirmation chart is used as a reference. Thus, the color correction information can be registered.

(Embodiment 4)
In the above correction chart, even if color correction information is newly registered (updated), the relationship between the reference value and other setting values is not updated according to this color correction information, and the initial value state It is the structure which maintains.

(Another embodiment)
The ink jet method is not limited to a method using a serial scanning print head, and may be an ink jet method using a line scanning print head.

The figure for demonstrating the function structure of an inkjet printer system Flowchart showing color correction processing operation Flowchart showing color correction processing operation The figure for demonstrating the function structure of an inkjet printer system The figure for demonstrating an example of a correction | amendment screen The figure for demonstrating an example of a correction | amendment screen The figure for demonstrating an example of a correction chart The figure for demonstrating an example of a correction | amendment screen The figure for demonstrating an example of a correction | amendment screen The figure for demonstrating an example of a correction chart The figure for demonstrating an example of a correction | amendment screen The figure for demonstrating an example of a correction | amendment screen The figure for demonstrating an example of a correction chart The figure for demonstrating an example of a confirmation chart

Explanation of symbols

10a First inkjet print 10b Second inkjet print 11 Communication unit 12 Color correction unit 13 RIP processing unit 14 Printing unit 101a First paper type setting unit 102a First correction chart storage unit 103a First correction chart printing unit 104a First color correction Information registration unit 105a First color correction information storage unit 106a First confirmation chart printing unit 101b Second paper type setting unit 102b Second correction chart storage unit 103b Second correction chart printing unit 104b Second color correction information registration unit 105b Second Color correction information storage unit 106b Second confirmation chart printing unit 30 Controller

Claims (10)

A paper type selection step for selecting a paper type for inkjet printer printing;
A correction chart printing step for printing the correction chart of the selected paper type;
And a color correction information registration step of selecting color correction information from the correction chart and registering the color correction information. A confirmation chart printing step for printing a confirmation chart of the color correction information after registration of the color correction information in the color correction information registration step;
Selecting the same paper type as the paper type and printing a correction chart of the paper type;
The color correction method for an ink jet printer according to claim 1, further comprising: selecting color correction information from the correction chart so as to match the confirmation chart and registering the color correction information. As a correction element of the color correction, including color balance, density and gradation,
For each correction element, a paper type selection step, a correction chart printing step, and a color correction registration step are executed, and a correction chart in which only the elements to be corrected are in an initial value state is configured and printed. The color correction method for an ink jet printer according to claim 1 or 2. A paper type setting unit that accepts input of a paper type for inkjet printer printing and sets the paper type;
A correction chart printing unit that accepts an instruction to print the correction chart of the set paper type and prints the correction chart;
A color correction information registration unit that receives input of specific color correction information included in the correction chart and registers the color correction information;
A color correction unit for correcting RGB image data based on the color correction information registered in the color correction information registration unit;
A RIP processing unit for RIP processing the RGB image data corrected by the color correction unit;
An inkjet printer comprising: a printing unit that performs printing processing based on grayscale data for each CMYK obtained by the RIP processing unit. As a correction element of the color correction, including color balance, density and gradation,
A paper type setting unit, a correction chart printing unit, and a color correction registration unit are provided for each correction element, and only a correction element is configured and printed with a correction chart in an initial value state. The inkjet printer according to claim 4. After registration of the color correction information by the color correction information registration unit, further comprising a confirmation chart printing unit for printing a confirmation chart of the color correction information,
The inkjet printer according to claim 4 or 5, wherein when color correction information is registered by the color correction information registration unit, color correction information is selected from the correction chart so as to match the confirmation chart. An inkjet printer system in which a plurality of inkjet printers and a controller are network-connected,
The controller is
An image data storage unit for storing RGB image data relating to photo processing;
A communication unit that transmits the RGB image data to the respective inkjet printers,
Each of the ink jet printers
A paper type setting unit that accepts input of a paper type for inkjet printer printing and sets the paper type;
A correction chart printing unit that accepts an instruction to print the correction chart of the set paper type and prints the correction chart;
A color correction information registration unit that receives input of specific color correction information included in the correction chart and registers the color correction information;
A color correction information storage unit for storing the registered color correction information;
A confirmation chart printing unit that accepts an instruction to print the confirmation chart of the color correction information and prints the confirmation chart;
A communication unit for receiving RGB image data related to photo processing from the controller;
A color correction unit that acquires the stored color correction information and corrects the received RGB image data based on the color correction information;
A RIP processing unit for RIP processing the RGB image data corrected by the color correction unit;
A printing unit that performs printing processing based on grayscale data for each CMYK obtained by the RIP processing unit,
A specific color correction information is input from a correction chart of a second ink jet printer so as to match a confirmation chart of the first ink jet printer. As a correction element of the color correction, including color balance, density and gradation,
A paper type setting unit, a correction chart printing unit, and a color correction registration unit are provided for each correction element, and only a correction element is configured and printed with a correction chart in an initial value state. The ink jet printer system according to claim 7. An inkjet printer system in which a plurality of inkjet printers and a controller are network-connected,
The controller is
An image data storage unit for storing RGB image data relating to photo processing;
A communication unit for transmitting the RGB image data to the respective inkjet printers;
Color adjustment means for setting color correction information for each of a plurality of inkjet printers,
The color adjusting means includes
A color adjustment target selection unit that selects an inkjet printer that performs color adjustment from a plurality of inkjet printers;
A paper type setting unit that accepts input of a paper type for inkjet printer printing and sets the paper type;
A correction chart printing unit that accepts an instruction to print the correction chart of the set paper type and prints the correction chart;
A color correction information registration unit that receives input of specific color correction information included in the correction chart and registers the color correction information;
A color correction information storage unit for storing the registered color correction information and the identification information of the inkjet printer in association with each other;
A check chart printing unit that receives an instruction to print the check chart of the color correction information and prints the check chart;
The stored color correction information is transmitted to the inkjet printer related to the color correction information by the communication unit,
Each of the ink jet printers
A communication unit for receiving RGB image data related to photo processing from the controller;
A color correction information storage unit that stores color correction information received from the controller by the communication unit;
A color correction unit that acquires the stored color correction information and corrects the received RGB image data based on the color correction information;
A RIP processing unit for RIP processing the RGB image data corrected by the color correction unit;
A printing unit that performs printing processing based on grayscale data for each CMYK obtained by the RIP processing unit,
A specific color correction information is input from a correction chart of a second ink jet printer so as to match a confirmation chart of the first ink jet printer. As a correction element of the color correction, including color balance, density and gradation,
A paper type setting unit, a correction chart printing unit, and a color correction registration unit are provided for each correction element, and only a correction element is configured and printed with a correction chart in an initial value state. The inkjet printer system according to claim 9.

Images