JP2009218823A - Image processor, image processing method, image processing program and image processing storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image processor which easily emphasizes only a required portion in a document. <P>SOLUTION: This image processor 120 includes: a color gamut setting part 121 for setting color gamuts which are regulated and not regulated when an image output device 130 outputs an image; a color gamut detecting part 123 for detecting the color gamut of image data for each input object; a parameter deciding part 124 for deciding a color conversion parameter for each object input from an image data output device 110 in response to the color gamut set by the color gamut setting part 121 and the color gamut detected by the color gamut detecting part 123; and a color converting part 126 which implements color matching on the image data from the image data output device 110 in response to the color conversion parameter decided by the parameter deciding part 124 to color-convert it into the image data for printing, and outputs the color-converted data to the image output device 130. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image processing device, an image processing method, an image processing program, and an image processing storage medium, and in particular, an image processing device, an image processing method, an image processing program, and an image processing for processing a document image composed of a plurality of objects. The present invention relates to a storage medium.

  In recent years, since color image display devices and color printers have become widespread, a document created by a computer or the like has frequently used an expression method for emphasizing using a color. For example, among various applications used in a computer, document creation software can select a high-saturation color that is easily noticeable in a color palette as a character color, and can highlight words, phrases, and the like in a sentence. Also, in drawing software suitable for creating figures and illustrations, it is possible to select a color from a unique color palette and specify the color of a figure or line segment. High-saturation colors that are conspicuous are used for portions that the creator considers to be particularly important and portions that are desired to be emphasized. Furthermore, spreadsheet software has a function that automatically generates pie charts and bar graphs simply by entering numerical values into the table, so that each area of the graph can be easily distinguished from other areas adjacent to these areas. The color scheme is automatically determined.

  On the other hand, sentences, diagrams, graphs, etc. created as described above are not only used by the application alone, but also copied or linked as an object (part) that constitutes a document of another application. Often used. However, in this case, although it is better to emphasize each object, it is often better not to emphasize it as a whole document. This is because if each object is emphasized in a document image composed of a plurality of objects, a portion to be emphasized as a whole document becomes unclear. Therefore, it is desirable that only the portion to be emphasized as the whole document can be emphasized or unnecessary enhancement can be suppressed.

  Conventionally, as what can perform this kind of processing, what was described in patent documents 1 and 2, for example is known.

  First, what is described in Patent Document 1 is such that an application sets color conversion processing attribute information suitable for each object, and executes optimal color conversion processing according to the attribute information.

Further, Patent Document 2 describes an image processing method capable of obtaining the same color reproduction in a plurality of types of output devices. By using this method, unnecessary enhancement can be suppressed. Specifically, what is described in Patent Document 2 maps image data in a color reproduction region common to a plurality of output devices, and performs color conversion to image data for a specific output device. . Here, since the color reproduction region common to a plurality of output devices generally tends to narrow as the number of output devices increases, the high saturation color selected for emphasis is also converted to low saturation as a result. Unnecessary emphasis will be suppressed.
Japanese Patent No. 3450387 Japanese Patent No. 3513334

  However, since the configuration described in Patent Document 1 is configured to execute color conversion processing suitable for each object, there is a problem that it is not possible to emphasize only a portion to be emphasized as a whole document. It was.

  In addition, the device described in Patent Document 2 is configured to perform color conversion based on a color reproduction region common to a plurality of output devices, so that a color gamut to suppress enhancement is arbitrarily controlled. However, there is a problem that emphasis of a portion to be emphasized as a whole document is limited.

  The present invention has been made to solve the conventional problems, and includes an image processing apparatus, an image processing method, an image processing program, and an image processing storage medium that can easily emphasize only a portion to be emphasized as a whole document. The purpose is to provide.

  An image processing apparatus according to the present invention includes an image data output apparatus that individually outputs image data included in data corresponding to one page of a document, and an image that outputs images based on the image data in one page. An image processing apparatus connected to an output device, wherein use of the image processing device is restricted when the image output device outputs the images in one page out of a color gamut that can be reproduced by the image output device. Color gamut setting means for setting a color gamut and an unrestricted color gamut, color gamut detection means for detecting a color gamut included in the input image data for each input image data input from the image data output device, and the color gamut setting Color conversion parameter determination means for determining a color conversion parameter according to the color gamut set by the means and the color gamut detected by the color gamut detection means; and color conversion of the input image data according to the color conversion parameter. It has a configuration in which a color converting unit.

  With this configuration, in the image processing apparatus of the present invention, the color gamut setting unit sets only the portion to be emphasized as the entire document, and the color conversion parameter is set according to the color gamut distributed in the image data detected by the color gamut detection unit. Since the conversion parameter determination means determines and the color conversion means converts the image data with the determined color conversion parameters, it is possible to easily emphasize only the portion to be emphasized as a whole document for a document image composed of a plurality of objects. Can do.

  In the image processing apparatus of the present invention, the image data output device outputs attribute information indicating an attribute of the image data, and the color gamut detecting unit is configured to output the image according to the attribute information. A color gamut included in the input image data is detected for each input image data input from a data output device, and the color conversion parameter determination means includes the attribute information, a color gamut that the image output device can reproduce, The color conversion parameter is determined according to the color gamut set by the color gamut setting means and the color gamut detected by the color gamut detection means.

  With this configuration, the image processing apparatus of the present invention can easily emphasize only the portion to be emphasized as the entire document based on the attribute information indicating the attribute of the image data.

  Furthermore, in the image processing apparatus of the present invention, the attribute information includes identification information for identifying at least one of an image, a character, and graphics, and the color gamut setting unit is used according to the identification information. The color gamut that restricts the color and the color gamut that is not restricted are set.

  With this configuration, in the image processing apparatus of the present invention, the color gamut setting means sets the color gamut that restricts use and the color gamut that does not restrict based on the identification information. Can be emphasized.

  Further, in the image processing apparatus of the present invention, the color gamut setting means designates at least a hue, and the color gamut corresponding to the designated hue is any of a color gamut that restricts use and a color gamut that does not restrict. It has a configuration to set up.

  With this configuration, the image processing apparatus of the present invention can set a color gamut that restricts use or not restrict by specifying at least a hue, so that only the portion to be emphasized as a whole document can be easily emphasized. can do.

  An image processing method according to the present invention includes an image data output device that individually outputs image data included in data corresponding to one page of a document, and an image that collectively outputs images based on the image data on one page. An image processing method in which an image processing device connected to an output device processes an image, and the image output device combines the images into one page in a color gamut that can be reproduced by the image output device. A color gamut setting step for setting a color gamut that restricts use and an unrestricted color gamut when outputting, and a color gamut that detects the color gamut included in the input image data for each input image data input from the image data output device A color conversion parameter determining step for determining a color conversion parameter in accordance with the detection step, the color gamut set in the color gamut setting step, and the color gamut detected in the color gamut detection step Has a configuration comprising a color conversion step of color converting the input image data in accordance with the color conversion parameters.

  With this configuration, the image processing method of the present invention sets only a portion to be emphasized as the entire document in the color gamut setting step, and sets the color conversion parameter according to the color gamut distributed in the image data detected in the color gamut detection step. Since it is determined in the conversion parameter determination step and the image data is converted in the color conversion step using the determined color conversion parameter, it is possible to easily emphasize only the portion of the document image composed of a plurality of objects to be emphasized as a whole document. Can do.

  In the image processing method of the present invention, the image data output device outputs attribute information indicating an attribute of the image data. In the color gamut detection step, the image data output device outputs the image information according to the attribute information. A color gamut included in the input image data is detected for each input image data input from the data output device, and in the color conversion parameter determination step, the attribute information, a color gamut that can be reproduced by the image output device, The color conversion parameter is determined according to the color gamut set by the color gamut setting means and the color gamut detected by the color gamut detection means.

  With this configuration, the image processing method of the present invention can easily emphasize only the portion to be emphasized as the whole document based on the attribute information indicating the attribute of the image data.

  An image processing program of the present invention includes an image data output device that individually outputs image data included in data corresponding to one page of a document, and an image that collectively outputs images based on the image data on one page. An image processing program for causing a computer to function as an image processing device connected to an output device, wherein the image output device outputs the image in a color gamut that the image output device can reproduce. Color gamut setting means for setting a color gamut that restricts use and a color gamut that is not restricted when outputting in a single page, and colors included in the input image data for each input image data input from the image data output device A color gamut detecting unit for detecting a gamut, a color gamut for determining a color conversion parameter according to the color gamut set by the color gamut setting unit and the color gamut detected by the color gamut detecting unit; And parameter determining means, and the input image data in accordance with the color conversion parameter has a configuration to function as a color conversion means for color conversion.

  With this configuration, the image processing program of the present invention allows the color gamut setting means to set only the portion to be emphasized as the entire document, and sets the color conversion parameter according to the color gamut distributed in the image data detected by the color gamut detection means. Since the conversion parameter determination means determines and the color conversion means converts the image data with the determined color conversion parameters, it is possible to easily emphasize only the portion to be emphasized as a whole document for a document image composed of a plurality of objects. Can do.

  In the image processing program of the present invention, the image data output device outputs attribute information indicating an attribute of the image data, and the color gamut detecting unit is configured to output the image according to the attribute information. A color gamut included in the input image data is detected for each input image data input from a data output device, and the color conversion parameter determination means includes the attribute information, a color gamut that the image output device can reproduce, The color conversion parameter is determined according to the color gamut set by the color gamut setting means and the color gamut detected by the color gamut detection means.

  With this configuration, the image processing program of the present invention can easily emphasize only the portion to be emphasized as the entire document based on the attribute information indicating the attribute of the image data.

  The image processing storage medium of the present invention has a configuration in which an image processing program is stored so as to be readable by a computer.

  With this configuration, the image processing storage medium of the present invention stores the image processing program so that the computer can read the computer program. Therefore, the computer that has read the image processing storage medium uses only the portion to be emphasized as the entire document as the color gamut setting means. By setting and determining the color conversion parameter as the color conversion parameter determination unit according to the color gamut distributed in the image data detected by the color gamut detection unit, and converting the image data as the color conversion unit with the determined color conversion parameter Therefore, it is possible to easily emphasize only a portion to be emphasized as a whole document with respect to a document image composed of a plurality of objects.

  Also, with this configuration, the image processing storage medium of the present invention stores the image processing program so that the computer can read the computer, and the computer that has read this image processing storage medium is based on the attribute information indicating the attribute of the image data. Therefore, it is possible to easily emphasize only the portion to be emphasized as the whole document.

  The present invention can provide an image processing apparatus, an image processing method, an image processing program, and an image processing storage medium having an effect that only a portion to be emphasized as a whole document can be easily emphasized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. An image processing system including the image processing apparatus of the present invention will be described as an example.

(First embodiment)
First, the configuration of the image processing system according to the first embodiment of the present invention will be described.

  FIG. 1 is a block diagram showing a configuration of an image processing system 100 in the present embodiment. As shown in FIG. 1, the image processing system 100 according to the present embodiment includes an image data output device 110, an image processing device 120, and an image output device 130. The image processing system 100 includes, for example, a computer including a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), a storage medium reader, and the like, and is based on a program stored in the storage medium. Is supposed to work.

  The image data output device 110 includes an application 111 and a drawing module 112, and individually outputs image data included in data corresponding to one page of a document to the image processing device 120. Further, the image data output device 110 outputs a page identification signal for identifying a page of the document to the image processing device 120.

  The application 111 is software that manages an object and its page layout, and outputs image data such as a drawing command signal and an image (for example, a natural image) for each object.

  The drawing module 112 generates graphic data such as graphics and lines, and image data such as characters, based on a drawing command from the application 111.

  An example of a document created by the application 111 is shown in FIG. The document shown in FIG. 2 includes three typical objects: text 301, image 302, and graphics 303 and 304. Specifically, the text 301 includes a red “[Overview]” character and a black character description. The image 302 is a color landscape image. The graphics 303 and 304 are a color pie chart and a bar chart, respectively.

  As described above, the three objects are typically exemplified because the names of drawing commands used in a general computer environment are different in the case of text, images, and graphics. Although an image object is essentially expanded into image data even if it is compressed, text and graphic objects are represented only by a drawing command. For this reason, a drawing module 112 is provided to develop text and graphic objects into image data.

  Returning to FIG. 1, the description of the configuration is continued. The image processing device 120 performs color matching processing on the input image data, thereby converting the color into image data for a printer 132 described later and outputting the image data to the image output device 130. The detailed configuration of the image processing apparatus 120 will be described later.

  The image output apparatus 130 includes a synthesis module 131 and a printer 132, and outputs images based on image data in one page.

  The composition module 131 lays out an image related to the input image data based on a drawing command from the application 111, and generates image data for each page. The printer 132 is input with the page unit image data generated by the synthesis module 131 and outputs an image.

  Next, based on FIG.1 and FIG.3, the detailed structure of the image processing apparatus 120 is demonstrated. FIG. 3 is a block diagram illustrating a detailed configuration of the image processing apparatus 120.

  As illustrated in FIG. 3, the image processing apparatus 120 includes a color gamut setting unit 121, an image buffer 122, a color gamut detection unit 123, a parameter determination unit 124, a parameter storage unit 125, and a color conversion unit 126. I have.

  The color gamut setting unit 121 includes a user interface including, for example, an input device such as a keyboard and a mouse, a display device such as a CRT (Cathode Ray Tube), and the printer 132 outputs an image in response to a user input. In this case, a color gamut that restricts use and a color gamut that is not restricted are set. The color gamut setting unit 121 constitutes a color gamut setting unit according to the present invention.

  The image buffer 122 temporarily stores the image data input from the image data output device 110. Here, the image buffer 122 holds the corresponding image data while the color gamut detection unit 123 detects the color gamut and the parameter determination unit 124 determines the color conversion parameter. It also has a function to synchronize the color conversion parameters referred to and the image data.

  The color gamut detection unit 123 is configured to detect a color gamut included in image data for each object input from the image data output device 110. Further, the color gamut detection unit 123 receives a page identification signal for identifying a page of the document from the image data output device 110. Note that the color gamut detection unit 123 constitutes a color gamut detection unit according to the present invention.

  The parameter determination unit 124 determines a color conversion parameter for each object input from the image data output device 110 according to the color gamut set by the color gamut setting unit 121 and the color gamut detected by the color gamut detection unit 123. It is like that. The parameter determination unit 124 constitutes a color conversion parameter determination unit according to the present invention.

  The parameter storage unit 125 stores color conversion parameters in a standard mode that does not limit the color gamut used when the printer 132 outputs an image, and is connected to the parameter determination unit 124. Accordingly, when the standard mode is set in the color gamut setting unit 121, the parameter determination unit 124 acquires the color conversion parameters stored in the parameter storage unit 125.

  The color conversion unit 126 performs color matching processing on the image data from the image data output device 110 in accordance with the color conversion parameter determined by the parameter determination unit 124, performs color conversion to image data for the printer 132, and performs color conversion. The processed image data is output to the image output device 130. Note that the color conversion unit 126 constitutes a color conversion unit according to the present invention.

  Next, the operation of the image processing apparatus 120 in the present embodiment will be described. FIG. 4 is a flowchart showing the operation of the image processing apparatus 120. Assume that the image processing system 100 processes image data of a document as shown in FIG.

  First, the color gamut setting unit 121 sets a color gamut to be used when the printer 132 outputs an image (step S11). Specifically, the color gamut setting unit 121 displays a screen for setting a color gamut that restricts use when outputting an image and a color gamut that is not restricted on a display device, and inputs a setting to the user. Prompt.

  An example of the screen is shown in FIG. FIG. 5 shows an example of setting only a color gamut that does not restrict use when outputting an image. In the example shown in FIG. 5, the color gamut is divided into six hues, that is, red, yellow, green, cyan, blue, magenta, and the user designates a hue that does not restrict use when outputting an image. To select. The screen is displayed on the touch panel display. When the user touches the hue name display units 501 to 506, the color gamut setting unit 121 detects the operation, and toggles designation or non-designation of the hue. Reflected on the display screen. Note that the hue that is not selected here is considered to be set as a color gamut that restricts use when outputting an image.

  The color gamut setting unit 121 determines a color gamut to be used when the printer 132 outputs an image, based on the color gamut restricted by the user and the color gamut restricted by the user.

  Here, an example of a color gamut determination method will be described with reference to FIGS.

First, in FIG. 6, a color reproduction range 601 of the printer 132 is a color reproduction range that can be reproduced by the printer 132, which is a primary color of yellow (Y), cyan (C), and magenta (M) that represents the color gamut. And the position on the a ^* -b ^* chromaticity plane of the CIELAB color space of secondary colors of red (R), green (G), and blue (B).

FIG. 6 shows an example in which the red hue is unrestricted and the use of other hues is restricted. The output use color gamut 602 in the figure is equal to the color reproduction range 601 of the printer in the red hue of the secondary color, and the hue is the same but the saturation, that is, a point where a ^* = b ^* = 0 ( L ^* indicates that the distance from the point) is set to half of the color reproduction range 601 of the printer 132.

FIG. 7 shows an example of the relationship between the color reproduction range 601 of the printer 132 and the output use color gamut 602 in the section with the L ^* axis. In this example, the color reproduction range 601 of the printer 132 is shown. Is determined to be a color gamut to be used when an image is output at a predetermined position toward a specific point (focal point 603) on the L ^* axis.

  As described above, the color gamut setting unit 121 can set a color gamut that restricts use and a color gamut that does not restrict when the printer 132 outputs an image by designating only the hue. This makes it easy to set in detail the portion to be emphasized as a whole document.

  In the above description, an example in which only the red hue is unrestricted has been described. Similarly, when only other hues are unrestricted, the color gamut to be used when outputting an image is determined. Further, the same applies when a plurality of hues are not limited.

  In the description using FIG. 6, an example is given in which the colors other than the red phase are limited to half of the color reproduction range 601 of the printer 132, but the present invention is not limited to this. The color reproduction range 601 of 132 may be 3/4, 1/4, or the like.

In the description using FIG. 7, the color gamut to be used when outputting an image is determined toward a specific point (focal point 603) on the L ^* axis. However, the present invention is not limited to this. Absent. For example, the boundary points indicating the highest chroma 604 and 605 (see FIG. 7) in the cross section of the L ^* axis, it may be determined as directed to a particular point on a different L ^* axis in the vertical direction.

  Returning to FIG. 4, the description of the operation will be continued. When the use color gamut is set in step S11, the color gamut detection unit 123 performs object reception (step S12). This processing is started after the color gamut detection unit 123 notifies the image data output device 110 that the image processing device 120 has completed preparation for image processing.

  Next, the color gamut detection unit 123 evaluates the use color gamut set in step S11 and determines whether or not to implement color gamut restriction (step S13). Here, the color gamut restriction is not performed, that is, whether all the color gamuts are set to be unrestricted in step S11. If all the color gamuts are set to be non-restricted, the standard described later is used. A color conversion process 404 (step S18) is performed.

  On the other hand, when it is set in step S11 that any one of the color gamuts is restricted, the color gamut detection unit 123 performs color gamut detection (step S14). Specifically, the color gamut detection unit 123 checks the color distribution of the image data of the object input from the image data output device 110 and detects the color gamut existing in the image data. The color gamut detected by this color gamut detection process is hereinafter referred to as “detected color gamut”.

  Next, it is determined whether or not the detected color gamut detected by the color gamut detection unit 123 exceeds the limited color gamut of the use color gamut set in step S11 (step S15), and the detected color gamut is determined to be the limited color gamut. If not, the standard color conversion process described later is performed.

  On the other hand, when the detected color gamut exceeds the limit color gamut, the parameter determination unit 124 performs parameter determination (step S16). Specifically, the parameter determination unit 124 determines a color conversion parameter in the color conversion process according to the detected color gamut detected by the color gamut detection unit 123 and the used color gamut set in step S11.

  Here, an example of the color conversion parameter determined by the parameter determination unit 124 will be described with reference to FIGS.

FIG. 8 shows the relationship between the detected color gamut acquired in step S14, that is, the color gamut 701 of the input image data, and the output use color gamut 602 set in step S11, and a ^* -b ^* color in the CIELAB color space. It is shown in the degree plane.

Here, the color gamut 701 of the input image data is linearly compressed and mapped to the output use color gamut 602. That is, as shown in FIG. 9, the outermost contour 702 of the color gamut of the input image data is made to correspond to the outermost contour 703 of the color gamut used at the time of output, and the L ^* axis (a ^* = b ^The color gamut is linearly compressed in the middle based on ^* = 0).

  In general, the outermost mapping method (dashed line 705 in FIG. 9) that maps the color gamut exceeding the output color gamut 602 shown in FIG. 8 to the outermost color of the output color gamut 602 is the fidelity of color reproduction. It is often used because it is excellent. This method has a disadvantage that many colors are mapped to the outermost outline of the color gamut, and gradation collapse is likely to occur. In particular, when the color gamut used when an image is intentionally output is limited, a drawback appears remarkably. For this reason, in this embodiment, as described above, the color gamut is linearly compressed to prevent occurrence of gradation collapse, and a more preferable result is obtained. Note that the present invention is not limited to the linear compression described above, and a nonlinear compression method (one-dot chain line 706 in FIG. 9) that obtains an intermediate effect between the two by nonlinear compression may be employed.

  As described above, the parameter determination unit 124 obtains image data corresponding to the representative points (grid points) of the color space formed by the input image data using the method described above, and obtains a three-dimensional LUT (look-up). Table), that is, color conversion parameters are determined.

  Returning to FIG. 4, the color conversion unit 126 performs a customized color conversion process based on the color conversion parameter determined by the parameter determination unit 124 (step S <b> 17), and converts the object image data into the image data for the printer 132. Convert.

  On the other hand, when the above-described standard color conversion process (step S18) is performed, the parameter determination unit 124 reads the color conversion parameter data stored in the parameter storage unit 125, and the color conversion unit 126 based on the color conversion parameter. Performs color conversion processing suitable for the case where the color gamut is not limited at all.

  When the color conversion unit 126 completes the color conversion process of step S17 or S18, the color gamut detection unit 123 processes all objects constituting the document based on the page identification signal input from the image data output device 110. Is completed (step S19). If not completed, the process returns to step S12 to accept the next object.

  In addition, the color gamut detection unit 123 ends the process if the processing of all the objects constituting the document has been completed.

  In addition, after programming each process described in the explanation of operation and storing the code of the program in a storage medium, the program functions as the image processing system 100 by operating the computer using the storage medium. Can be made. In this case, the computer has the configuration shown in FIG.

  As described above, according to the image processing device 120 in the present embodiment, among the color gamuts that can be reproduced by the image output device 130, the color gamut that restricts the use when outputting image data collectively and the non-restriction. A color gamut setting unit 121 that sets a color gamut to be set, a color gamut detection unit 123 that detects a color gamut distributed in image data for each image data input from the image data output device 110, and a color gamut setting unit 121. In accordance with the color gamut and the color gamut detected by the color gamut detection unit 123, the parameter determination unit 124 that determines a color conversion parameter, and the image data output device 110 according to the color conversion parameter determined by the parameter determination unit 124 The color gamut setting unit 121 sets only a portion to be emphasized as the entire document, and the color gamut detection unit 1 The color conversion parameter is determined by the parameter determination unit 124 according to the color gamut in which the image data detected in 3 is distributed, and the color conversion unit 126 converts the image data with the determined parameter, so that only the portion to be emphasized as the entire document is selected. Can be easily emphasized.

  In the above-described embodiment, a typical Lab color space has been described as an example. However, the present invention is not limited to this, and brightness and chromaticity such as a Luv color space and a Munsell color space. Any color space can be applied.

(Second Embodiment)
First, the configuration of the image processing system according to the second embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the component similar to the image processing system 100 (refer FIG. 1) in 1st Embodiment, and the overlapping description is abbreviate | omitted.

  FIG. 10 is a block diagram showing a configuration of the image processing system 200 in the present embodiment. As shown in FIG. 10, the image processing system 200 in the present embodiment includes an image data output device 210, an image processing device 220, and an image output device 130.

  The application 211 in the image data output device 210 is software that manages objects and their page layouts, and outputs image data such as drawing command signals and images for each object. Here, the drawing command in the present embodiment includes an object to be excluded from the color gamut restriction target using the attribute information of the object, that is, information indicating an object for which the color gamut is unrestricted (hereinafter referred to as “color gamut unrestricted object”). Information ”). For example, the color gamut unrestricted object information indicates that color gamut restriction is not performed on an image object among objects such as characters, images, and graphics. Then, the application 211 outputs a drawing command signal including color gamut unrestricted object information to the image processing apparatus 220 and the image output apparatus 130.

  FIG. 11 is a block diagram showing a configuration of the image processing apparatus 220 in the present embodiment. As shown in FIG. 11, the image processing apparatus 220 according to the present embodiment includes a color gamut setting unit 121, an image buffer 122, a color gamut detection unit 221, a parameter determination unit 222, a parameter storage unit 125, and a color A conversion unit 223.

  The color gamut detection unit 221 receives a drawing command signal including color gamut unrestricted object information from the image data output device 210, and detects the color gamut of the object specified by the color gamut unrestricted object information. Do not run.

  The parameter determination unit 222 receives a rendering command signal including color gamut unrestricted object information from the image data output device 210, and does not determine the color conversion parameter of the object for the object specified by the color gamut unrestricted object information. It is like that.

  When the parameter determination unit 222 does not determine the color conversion parameter based on the color gamut unrestricted object information, the color conversion unit 223 performs the color conversion of the image data of the object, that is, the image data read from the image buffer 122. Are output to the image output device 130 as they are.

  Since the image processing apparatus 220 in the present embodiment is configured as described above, the operation of the image processing apparatus 220 is a flowchart as shown in FIG. That is, in the determination of whether or not to implement the color gamut restriction (step S13), if it is determined that any one of the color gamuts is restricted, whether or not the object to be processed is the object indicated by the color gamut unrestricted object information The determination (step S21) is performed.

  Specifically, for example, when the color gamut unrestricted object information indicates that only the image object is excluded from the target of the color gamut restriction, the standard color conversion process (step S18) is performed on the image object. On the other hand, if the target object is a color gamut restriction object, such as a character or graphics, color gamut detection processing is performed in step S14.

  In this embodiment, only the object of the image is excluded from the object of the color gamut restriction. When the image processing target object is an image, there is often no intentional enhancement, and the color gamut restriction is performed. This is because, in many cases, the saturation is lowered, and a favorable result is often not obtained. However, the present invention is not limited to this.

  As described above, according to the image processing device 220 in the present embodiment, the color gamut detection unit 221 and the parameter determination unit 222 receive a rendering command signal including color gamut unrestricted object information from the image data output device 210. With this configuration, it is possible to easily emphasize only the portion to be emphasized as the whole document according to the color gamut unrestricted object information.

  In the above-described embodiment, the application 211 has been described with reference to an example in which the rendering command signal including the color gamut unrestricted object information is output to the image processing apparatus 220 and the image output apparatus 130. It is not limited to. For example, the attribute information includes identification information for identifying at least one of an image, a character, and graphics, and the application 211 outputs a drawing command signal including the identification information to the image processing device 220 to set a color gamut. The unit 121 may be configured to set a color gamut that restricts use and an unrestricted color gamut when the printer 132 outputs an image based on the identification information.

  As described above, the image processing apparatus, the image processing method, the image processing program, and the image processing storage medium according to the present invention have an effect that it is possible to easily emphasize only a portion to be emphasized as a whole document, It is useful as an image processing apparatus, an image processing method, an image processing program, an image processing storage medium, and the like for processing a document image composed of objects.

1 is a block diagram showing a configuration of an image processing system according to a first embodiment of the present invention. The figure which shows an example of the document produced with the application of the image processing system in the 1st Embodiment of this invention 1 is a block diagram showing a detailed configuration of an image processing apparatus of an image processing system according to a first embodiment of the present invention. The flowchart which shows operation | movement of the image processing apparatus in the 1st Embodiment of this invention. The figure which shows the example in the case of setting only the color gamut which does not restrict | limit use when outputting an image in the image processing apparatus in the 1st Embodiment of this invention. The figure which shows an example of the determination method of a color gamut in the image processing apparatus in the 1st Embodiment of this invention. The figure which shows an example of the relationship between the color reproduction range of the printer in the cross section with a L ^* axis ^| shaft, and the use color gamut at the time of output in the image processing apparatus in the 1st Embodiment of this invention. The image processing apparatus in the 1st Embodiment of this invention WHEREIN ^{: The} figure which shows the relationship between a detection color gamut and the output use color gamut in the a ^* -b ^* chromaticity plane of CIELAB color space. The figure which shows an example which linearly compresses the color gamut of input image data, and maps it to the output use color gamut in the image processing apparatus in the 1st Embodiment of this invention. The block diagram which shows the structure of the image processing system in the 2nd Embodiment of this invention. The flowchart which shows operation | movement of the image processing apparatus in the 2nd Embodiment of this invention. The flowchart which shows operation | movement of the image processing apparatus in the 2nd Embodiment of this invention.

Explanation of symbols

100, 200 Image processing system 110, 210 Image data output device 111, 211 Application 112 Drawing module 120, 220 Image processing device 121 Color gamut setting unit (color gamut setting means)
122 Image buffer 123, 221 Color gamut detection unit (color gamut detection means)
124, 222 Parameter determination unit (color conversion parameter determination means)
125 Parameter storage unit 126 Color conversion unit (color conversion means)
DESCRIPTION OF SYMBOLS 130 Image output device 131 Composition module 132 Printer 223 Color conversion part 301 Text 302 Image 303, 304 Graphics 404 Standard color conversion process 501-506 Hue name display part 601 Color reproduction range 602 Output color gamut 603 Focus 604, 605 L ^* Point indicating maximum saturation in cross section of axis 701 Color gamut of input image data 702 Outermost color gamut of input image data 703 Outermost color gamut used at output 704 Straight line indicating linear color gamut compression 705 Used color at output Dashed line indicating the outermost mapping method for mapping to the outermost contour of the area

Claims (9)

An image data output device that individually outputs image data included in data corresponding to one page of a document, and an image output device that outputs images based on the image data in one page. A processing device comprising:
Of the color gamuts that can be reproduced by the image output device, color gamut setting means for setting a color gamut that restricts use and a color gamut that is not restricted when the image output device collectively outputs the image on one page. When,
Color gamut detection means for detecting a color gamut included in the input image data for each input image data input from the image data output device;
Color conversion parameter determination means for determining a color conversion parameter according to the color gamut set by the color gamut setting means and the color gamut detected by the color gamut detection means;
An image processing apparatus comprising: color conversion means for color-converting the input image data in accordance with the color conversion parameter. The image data output device outputs attribute information indicating an attribute of the image data,
The color gamut detection means detects a color gamut included in the input image data for each input image data input from the image data output device according to the attribute information,
The color conversion parameter determination means includes the attribute information, a color gamut that can be reproduced by the image output device, a color gamut set by the color gamut setting means, and a color gamut detected by the color gamut detection means. The image processing apparatus according to claim 1, wherein a color conversion parameter is determined in response. The attribute information includes identification information for identifying at least one of an image, a character, and graphics,
The image processing apparatus according to claim 2, wherein the color gamut setting unit sets a color gamut that restricts use and a color gamut that does not restrict the use according to the identification information. The color gamut setting means specifies at least a hue, and sets a color gamut corresponding to the designated hue to either a color gamut that restricts use or a color gamut that does not restrict. Item 4. The image processing device according to any one of Items 1 to 3. An image data output device that individually outputs image data included in data corresponding to one page of a document, and an image output device that outputs images based on the image data in one page. An image processing method in which a processing device processes an image,
A color gamut setting step of setting a color gamut that restricts use and a color gamut that is not restricted when the image output device outputs the images collectively on one page, among the color gamuts that the image output device can reproduce. When,
A color gamut detection step of detecting a color gamut included in the input image data for each input image data input from the image data output device;
A color conversion parameter determination step for determining a color conversion parameter according to the color gamut set in the color gamut setting step and the color gamut detected in the color gamut detection step;
A color conversion step of color-converting the input image data in accordance with the color conversion parameter. The image data output device outputs attribute information indicating an attribute of the image data,
In the color gamut detection step, according to the attribute information, a color gamut included in the input image data is detected for each input image data input from the image data output device,
In the color conversion parameter determination step, the attribute information, a color gamut that can be reproduced by the image output device, a color gamut set by the color gamut setting unit, and a color gamut detected by the color gamut detection unit. 6. The image processing method according to claim 5, wherein a color conversion parameter is determined accordingly. An image data output device that individually outputs image data included in data corresponding to one page of a document, and an image output device that outputs images based on the image data in one page. An image processing program for causing a computer to function as a processing device,
The computer,
Of the color gamuts that can be reproduced by the image output device, color gamut setting means for setting a color gamut that restricts use and a color gamut that is not restricted when the image output device collectively outputs the image on one page. When,
Color gamut detection means for detecting a color gamut included in the input image data for each input image data input from the image data output device;
Color conversion parameter determination means for determining a color conversion parameter according to the color gamut set by the color gamut setting means and the color gamut detected by the color gamut detection means;
An image processing program causing a function of color conversion to color-convert the input image data in accordance with the color conversion parameter. The image data output device outputs attribute information indicating an attribute of the image data,
The color gamut detection means detects a color gamut included in the input image data for each input image data input from the image data output device according to the attribute information,
The color conversion parameter determination means includes the attribute information, a color gamut that can be reproduced by the image output device, a color gamut set by the color gamut setting means, and a color gamut detected by the color gamut detection means. The image processing program according to claim 7, wherein color conversion parameters are determined in response. An image processing storage medium, wherein the image processing program according to claim 7 or 8 is stored so as to be readable by a computer.

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