JP2013167926A - Color image forming apparatus and image forming program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color image forming apparatus capable of improving visibility of an image printed on a recording medium in a color other than white.SOLUTION: When an object in a vector form in print data received by print data reception means has a color within a specific color difference range relative to a color of a medium received by medium color reception means (YES in S135, YES in S136), an MFP sets a color of a contour of the object to a color outside the specific color difference range relative to the color of a medium received by the medium color reception means (S138, S139), and creates image data for printing (S140).

Description

  The present invention relates to a color image forming apparatus capable of printing a color image on a recording medium such as paper.

  As a conventional color image forming apparatus, when printing a color image on a recording medium of a color other than white, an image printing process based on the print data is performed, and a process of printing a color image on a white recording medium Is known to improve the visibility of an image printed on a recording medium of a color other than white (see Patent Documents 1-4).

  For example, the color image forming apparatus described in Patent Document 1 uses a paper color and a character color corresponding to the paper color (for example, a light color when the paper color is dark and a light color when the paper color is light). In this case, a dark color, a complementary color of the paper color, etc.) are set in the table, a color corresponding to the determined paper color is searched from the table, and characters of the searched color are printed on the paper.

  Further, in the color image forming apparatus described in Patent Document 2, when the value of each color component of the paper is set by the user, the value of each color component of the image data is set for each color component of the paper set by the user. An image based on the image data is printed on paper after adding or subtracting by value.

  In addition, the color image forming apparatus described in Patent Document 3 measures the color of the paper by the colorimetric function unit, changes the non-printing designated area of the image data to a white area, An image based on the image data is printed on the paper after changing the area of the color approximated to the color of the paper measured by the colorimetric function unit to an area designated for non-printing.

  Further, the color image forming apparatus described in Patent Document 4 changes the color of image data when the color of the tab sheet set by the user is similar to the color of image data such as characters. A warning to that effect is issued to the user, the color of the image data is changed, and an image based on the image data is printed on the tab sheet.

Japanese Patent Laid-Open No. 10-31572 JP 11-115250 A JP 2001-287407 A JP 2008-65366 A

  The inventor of the present application has studied a technique of a method different from the conventional technique as a technique for improving the visibility of an image printed on a recording medium of a color other than white.

  SUMMARY An advantage of some aspects of the invention is that it provides a color image forming apparatus capable of improving the visibility of an image printed on a recording medium of a color other than white.

  The color image forming apparatus of the present invention includes a printing device capable of printing a color image on a recording medium, a print data receiving unit that receives print data, and a medium color that receives a medium color that is the color of the recording medium as a numerical value. Receiving means; printing image data generating means for generating printing image data which is image data for printing by the printing device based on the printing data received by the printing data receiving means; and the printing image data Printing control means for printing an image based on the printing image data generated by the generating means on the recording medium by the printing device, and the printing image data generating means is provided by the print data receiving means. The color of the vector format object in the received print data is the medium color receiving means. Therefore, when the color is within a specific color difference range with respect to the received medium color, the color of the contour of the object is set to a specific color difference with respect to the medium color received by the medium color receiving unit. The printing image data is generated by setting a color outside the range.

  With this configuration, the color image forming apparatus according to the present invention, when the color of the object in the vector format in the print data is a color within a specific color difference range with respect to the color of the recording medium, Since the color outside the range of the specific color difference with respect to the color of the recording medium is set, the visibility of the image printed on the recording medium of a color other than white can be improved.

  In the color image forming apparatus according to the present invention, the printing image data generating unit receives the color of the object in the vector format in the print data received by the print data receiving unit by the medium color receiving unit. If the color is within a specific color difference range with respect to the medium color, the image data for printing may be generated without the color of the area in the outline of the object.

  With this configuration, the color image forming apparatus according to the present invention enables the area in the outline of the object when the color of the vector-type object in the print data is a color within a specific color difference range with respect to the color of the recording medium. Therefore, consumption of colorants such as toner can be suppressed.

  Further, the color image forming apparatus of the present invention includes a medium supply unit for supplying the recording medium, and the medium color receiving unit receives the medium color for each of the medium supply units, and the printing image The medium color used by the data generation means in generating the print image data is received by the medium supply unit designated as the supply source of the recording medium to the printing device in the print data. The medium color accepted by the means may be used.

  With this configuration, the color image forming apparatus of the present invention accepts the designation of the recording medium supply source, so that the color of the recording medium to be used in generating the printing image data is determined. Can do.

  The color image forming apparatus of the present invention further includes a medium color name receiving unit that receives a medium color name, which is a name of the color of the recording medium, for each medium supply unit, and the print data includes the medium color name. The supply source may be specified by the medium color name received by the receiving unit.

  With this configuration, the color image forming apparatus according to the present invention receives the designation of the recording medium supply source by the name of the color of the recording medium, so that the image is corrected when the user does not want to correct the image for improving the visibility. It is possible to reduce the possibility that the supplier who executes the correction is erroneously designated by the user.

  The color image forming apparatus of the present invention may further include a reading device that reads an image from a document, and the medium color receiving unit may receive the color of the recording medium read by the reading device.

  With this configuration, the color image forming apparatus of the present invention can accept the color of the recording medium by reading the recording medium with the reading device, so that the user can easily set the color of the recording medium.

  The image forming program of the present invention is an image forming program executed by a color image forming apparatus having a printing device capable of printing a color image on a recording medium, and accepts print data. A medium color accepting step for accepting a medium color that is the color of the recording medium as a numerical value; and printing data that is image data for printing by the printing device based on the print data accepted by the print data accepting step A printing image data generation step for generating image data; and a printing control step for printing an image based on the printing image data generated by the printing image data generation step on the recording medium by the printing device. The image data for printing is executed by a color image forming apparatus. In the forming step, the color of the vector-type object in the print data received by the print data receiving step is a color within a specific color difference range with respect to the medium color received by the medium color receiving step. If there is, it is a step of generating the printing image data by setting the color of the contour of the object to a color outside a specific color difference range with respect to the medium color received by the medium color receiving step. It is characterized by.

  With this configuration, the color image forming apparatus that executes the image forming program according to the present invention allows the color of the vector object in the print data to be within a specific color difference range with respect to the color of the recording medium. Since the color of the contour of the object is set to a color outside the range of a specific color difference with respect to the color of the recording medium, it is possible to improve the visibility of an image printed on a recording medium having a color other than white.

  The color image forming apparatus of the present invention can improve the visibility of an image printed on a recording medium of a color other than white.

1 is a block diagram of a network system according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a structure of the MFP shown in FIG. 1. FIG. 3 is a block diagram of the MFP shown in FIG. 2. It is a figure which shows the paper feed tray information shown in FIG. It is a block diagram of PC shown in FIG. 4 is a flowchart of the operation of the MFP shown in FIG. 3 when setting paper feed tray information. 4 is a flowchart of the operation of the MFP shown in FIG. 3 when printing an image. It is a figure which shows the warning screen displayed on the display part shown in FIG. (A) is a figure which shows the recording medium on the paper feed tray shown in FIG. FIG. 4B is a diagram illustrating an example of an image based on print data received by the MFP illustrated in FIG. 3. FIG. 4 is a diagram illustrating a printed matter by the MFP illustrated in FIG. 3. FIG. 11 is a diagram illustrating a printed matter by the MFP illustrated in FIG. 3, and is a diagram illustrating an example different from the example illustrated in FIG. 10.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  First, the configuration of the network system according to the present embodiment will be described.

  FIG. 1 is a block diagram of a network system 10 according to the present embodiment.

  As shown in FIG. 1, the network system 10 includes an MFP (Multifunction Peripheral) 20 as a color image forming apparatus and a PC (Personal Computer) 50 that is an apparatus external to the MFP 20. The MFP 20 and the PC 50 are connected to be communicable with each other via a network 11 such as a LAN (Local Area Network).

  FIG. 2 is a schematic diagram of the structure of the MFP 20. FIG. 3 is a block diagram of the MFP 20.

  As shown in FIGS. 2 and 3, the MFP 20 includes an operation unit 21 that is an input device such as buttons for inputting various operations by the user, and a display such as an LCD (Liquid Crystal Display) that displays various information. A display unit 22 that is a device, a printer 23 that is a printing device that executes printing of an image on a recording medium 91 such as paper, and a plurality of paper feeds as a medium supply unit for supplying the recording medium 91 to the printer 23 A fax device that performs fax communication via a communication line such as a public telephone line, and a tray 24, a paper discharge tray 25 from which a recording medium 91 is discharged from the printer 23, a scanner 26 that reads an image from a document, and a public telephone line. A network communication device that communicates with the fax communication unit 27 via the network 11. A network communication unit 28 that is a device, a storage unit 30 that is a storage device such as an EEPROM (Electrically Erasable Programmable Read Only Memory) and an HDD (Hard Disk Drive) that stores various data, and a control that controls the entire MFP 20 Part 40.

  The printer 23 is a color printer that can print a color image on the recording medium 91.

  The storage unit 30 stores an image forming program 31 for printing an image on the recording medium 91. The image forming program 31 may be installed in the MFP 20 at the manufacturing stage of the MFP 20, may be additionally installed in the MFP 20 from a storage medium such as a USB (Universal Serial Bus) memory, an SD memory card, or the network 11. It may be additionally installed in the MFP 20 from above.

  The storage unit 30 stores paper feed tray information 32 that is information about the paper feed tray 24.

  FIG. 4 is a diagram showing the paper feed tray information 32.

  As shown in FIG. 4, in the paper feed tray information 32, a medium color name 32 a that is a color name of the recording medium 91 and a medium color 32 b that is the color of the recording medium 91 are set for each paper feed tray 24. Information. The medium color name 32a is a character string of a color such as yellow, green, gray, or orange. The medium color 32b is a numerical value of a color such as an XYZ value or a Lab value.

  As illustrated in FIG. 3, the control unit 40 includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory) storing a program and various data, and a RAM (Random) used as a work area of the CPU. Access Memory). The CPU executes a program stored in the ROM or the storage unit 30.

  The control unit 40 executes the image forming program 31 stored in the storage unit 30, whereby a medium color name receiving unit 41 that receives the medium color name 32 a for each paper feed tray 24 and a medium color 32 b for the paper feed tray 24. Based on the print data received by the medium color receiving unit 42, the print data receiving unit 43, and the print data receiving unit 43 that receives the print data, print image data that is image data for printing by the printer 23 is generated. It functions as a print image data generation unit 44 and a print control unit 45 that prints an image based on the print image data generated by the print image data generation unit 44 on the recording medium 91 by the printer 23.

  The objects included in the print data include an image attribute object suitable for photo expression, a vector attribute object suitable for graphic expression, and a character attribute object suitable for character expression. The image attribute object is a raster object. The vector attribute object and the character attribute object are objects in the vector format. The image attribute object and the vector attribute object are objects to which color conversion with high gradation is performed. The character attribute object is an object that undergoes color conversion with low gradation.

  FIG. 5 is a block diagram of the PC 50.

  As shown in FIG. 5, the PC 50 includes an operation unit 51 that is an input device such as a mouse and a keyboard for inputting various operations by a user, and a display unit 52 that is a display device such as an LCD that displays various information. A network communication unit 53 that is a network communication device that performs communication via the network 11, a storage unit 60 that is a storage device such as an HDD that stores various data, and a control unit 70 that controls the entire PC 50. I have.

  The storage unit 60 stores utility software 61 for executing various settings on the MFP 20 and a printer driver 62 for controlling printing on the MFP 20.

  The utility software 61 and the printer driver 62 may be installed in the PC 50 at the manufacturing stage of the PC 50, or are additionally installed in the PC 50 from a storage medium such as a USB memory, a CD (Compact Disc), a DVD (Digital Versatile Disc). Alternatively, it may be additionally installed on the PC 50 from the network 11.

  The control unit 70 includes, for example, a CPU, a ROM that stores programs and various data, and a RAM that is used as a work area of the CPU. The CPU is configured to execute a program stored in the ROM or the storage unit 60.

  Next, the operation of the network system 10 will be described.

<Setting of paper feed tray information 32>
The user can instruct the PC 50 to instruct the MFP 20 to set the paper feed tray information 32 by causing the control unit 70 of the PC 50 to execute the utility software 61. An instruction for setting the paper feed tray information 32 is made by designating the paper feed tray 24 and the medium color name 32a and medium color 32b desired to be associated with the paper feed tray 24 via the operation unit 51 of the PC 50. Executed. Upon receiving this instruction, the control unit 70 of the PC 50 instructs the MFP 20 to set the paper feed tray information 32 via the network 11.

  In addition, the user designates the paper feed tray 24 and the medium color name 32a and the medium color 32b desired to be associated with the paper feed tray 24 via the operation unit 21 of the MFP 20, thereby providing the paper feed tray information. 32 settings can be instructed to the MFP 20.

  When the setting of the paper feed tray information 32 is instructed, the control unit 40 of the MFP 20 executes the process shown in FIG.

  FIG. 6 is a flowchart of the operation of the MFP 20 when the paper feed tray information 32 is set.

  As illustrated in FIG. 6, the control unit 40 of the MFP 20 targets the first paper feed tray 24 among the paper feed trays 24 specified in the setting instruction of the paper feed tray information 32 (S101).

  Next, the control unit 40 determines whether or not the medium color name 32a has been designated for the currently targeted paper feed tray 24 (S102).

  When the medium color name accepting unit 41 of the control unit 40 determines in S102 that the medium color name 32a has been designated, the medium color name 32a is written in the paper feed tray information 32 for the currently targeted paper feed tray 24 ( S103). That is, the medium color name receiving unit 41 receives the medium color name 32 a for each paper feed tray 24.

  The control unit 40 determines in S102 that the medium color name 32a has not been specified, or when the process of S103 is completed, whether or not the medium color 32b has been specifically specified for the current paper feed tray 24. Is determined (S104).

  When the medium color accepting unit 42 of the control unit 40 determines in S104 that the medium color 32b has been specifically specified, the medium color 32b is written in the sheet feed tray information 32 for the sheet feed tray 24 currently targeted ( S105). That is, the medium color accepting unit 42 accepts the medium color 32 b for each paper feed tray 24.

  When determining in S104 that the medium color 32b has not been specifically specified, the control unit 40 determines whether or not the scanner 26 has instructed the reading of the medium color 32b (S106).

  When the control unit 40 determines in S106 that the scanner 26 has instructed the reading of the medium color 32b, the control unit 40 reads the recording medium 91 set on the scanner 26 by the user using the scanner 26, whereby the medium color 32b of the recording medium 91 is read. Is read (S107).

  Next, the medium color accepting unit 42 of the control unit 40 writes the medium color 32b read in S107 in the paper feed tray information 32 for the current paper feed tray 24 (S108). That is, the medium color accepting unit 42 accepts the medium color 32 b for each paper feed tray 24.

  When the control unit 40 determines in S106 that the process of S105 or S108 is completed or that the scanner 26 has not instructed the reading of the medium color 32b, all the paper feeds specified in the setting instruction of the paper feed tray information 32 are determined. It is determined whether or not the paper tray 24 is targeted (S109).

  When the control unit 40 determines in S109 that there is a sheet tray 24 that is not yet targeted among the sheet trays 24 specified in the setting instruction of the sheet tray information 32, the control unit 40 sets the sheet tray information 32. Among the paper feed trays 24 specified in the instruction, the paper feed tray 24 next to the current paper feed tray 24 is targeted (S110), and the process returns to S102.

  On the other hand, if the control unit 40 determines in S109 that all the paper feed trays 24 specified in the setting instruction of the paper feed tray information 32 have been targeted, the process shown in FIG.

<Print image>
The user can instruct the PC 50 to print an image on the MFP 20 via the operation unit 51 of the PC 50 by causing the control unit 70 of the PC 50 to execute the printer driver 62. Upon receiving this instruction, the control unit 70 of the PC 50 instructs the MFP 20 to print an image via the network 11. When the user instructs to print an image, not only can the printer driver 62 directly designate the paper feed tray 24 that supplies the recording medium 91 to the printer 23, but also the recording medium 91 can be specified to the printer 23. The paper feed tray 24 to be supplied is indirectly designated in the printer driver 62 by any one of the medium color name 32a of the recording medium 91, the size of the recording medium 91, and the type of the recording medium 91 such as plain paper or cardboard. Can do.

  When the control unit 40 of the MFP 20 is instructed to print an image, it executes the processing shown in FIG.

  FIG. 7 is a flowchart of the operation of the MFP 20 when printing an image.

  As shown in FIG. 7, the print data receiving unit 43 of the control unit 40 of the MFP 20 receives the print data transmitted from the PC 50 (S131).

  Next, the print image data generation unit 44 of the control unit 40 rasterizes the image data based on the print data received in S131 (S132). That is, the print image data generation unit 44 generates print image data that is image data for printing by the printer 23 based on the print data received by the print data reception unit 43.

  Next, the control unit 40 determines whether or not the paper feed tray 24 is designated by the medium color name 32a in the print data received in S131 (S133).

  When the print control unit 45 of the control unit 40 determines in S133 that the paper feed tray 24 is not designated by the medium color name 32a in the print data, it is based on the print image data generated by the print image data generation unit 44. The printed image is printed on the recording medium 91 by the printer 23 (S134). Here, the print control unit 45 uses the recording medium 91 on the paper feed tray 24 (hereinafter referred to as “supply source tray”) designated as the supply source of the recording medium 91 to the printer 23 in the print data. To use.

  When the process of S134 is completed, the control unit 40 ends the process shown in FIG.

  When the control unit 40 determines in S133 that the paper feed tray 24 is designated by the medium color name 32a in the print data, the control unit 40 determines whether or not the medium color 32b is set in the supply source tray based on the paper feed tray information 32. (S135).

  If the control unit 40 determines in S135 that the medium color 32b is not set in the supply source tray, the control unit 40 executes S134 and ends the processing shown in FIG.

  If the control unit 40 determines in S135 that the medium color 32b is set in the supply source tray, the color of the vector format object in the print data received by the print data receiving unit 43 is set in the paper feed tray information 32. It is determined based on the printing image data generated in S132 whether the color is within a specific color difference range with respect to the medium color 32b set in the supply source tray (S136).

  In S136, the control unit 40 determines that there is no vector format object in the print data, or the colors of all the vector format objects in the print data are colors outside the specific color difference range with respect to the medium color 32b. If it is determined in S136 that there is, S134 is executed and the processing shown in FIG.

  When the control unit 40 determines in S136 that the color of any vector-type object in the print data is within a specific color difference range with respect to the medium color 32b, the control unit 40 displays a warning screen illustrated in FIG. Display and wait for an instruction from the user (S137).

  FIG. 8 is a diagram showing a warning screen displayed on the display unit 22.

  The warning screen shown in FIG. 8 includes a print continuation button 81 that is a button for instructing to continue printing as it is, and a visibility improvement print button that is a button for instructing printing to improve visibility. 82 and a print cancel button 83 that is a button for instructing to cancel printing.

  The user can press any one of the print continuation button 81, the visibility improving print button 82, and the print cancel button 83 via the operation unit 21.

  Note that the control unit 40 may display a warning screen shown in FIG. 8 on the display unit 52 of the PC 50. In this case, the user can press any one of the print continuation button 81, the visibility improving print button 82, and the print cancel button 83 via the operation unit 51 of the PC 50.

  As shown in FIG. 7, when the control unit 40 of the MFP 20 determines in S137 that the print continuation button 81 has been pressed, it executes S134 and ends the process shown in FIG.

  If the control unit 40 determines in S137 that the print cancel button 83 has been pressed, it ends the process shown in FIG. 7 without executing S134.

  When the print image data generating unit 44 of the control unit 40 determines in S137 that the visibility improving print button 82 has been pressed, the color of the objects in the print data received in S131 is specified for the medium color 32b. For the vector-type object determined in S136 as being within the color difference range, the attribute is changed from the fill attribute to the stroke attribute (S138). With this processing, only the outline is printed for the vector-type object determined in S136 that the color is within the specific color difference range with respect to the medium color 32b.

  Next, the printing image data generation unit 44 sets the color of the object whose attribute has been changed in S138 to a color outside the specific color difference range with respect to the medium color 32b (S139). As a result of this processing, for the vector-type object determined in S136 that the color is within the specific color difference range with respect to the medium color 32b, the color of the outline is outside the specific color difference range with respect to the medium color 32b. Set to Here, the color to be set can be determined by an arbitrary method. For example, if the set color is one of cyan, magenta, and yellow, the print image data generation unit 44 is one of cyan, magenta, and yellow that has the largest color difference with respect to the medium color 32b. You can set the color.

  Next, the print image data generation unit 44 rasterizes the image data based on the print data received in S131 and subjected to the processes of S138 and S139 (S140). In other words, the print image data generation unit 44 determines that the color of the vector-type object in the print data received by the print data reception unit 43 is a specific color difference from the medium color 32b received by the medium color reception unit 42. The color of the contour of the object is set to a color outside the specific color difference range with respect to the medium color 32b received by the medium color receiving means 42, and the print image data is Generate.

  Then, the control unit 40 executes the process of S134 so that the printer 23 prints an image based on the print image data generated in S140 on the recording medium 91, and ends the process shown in FIG.

  FIG. 9A shows the recording medium 91 on the paper feed tray 24. FIG. 9B is a diagram illustrating an example of the image 92 based on the print data received by the MFP 20.

  In FIG. 9, hatching represents a color other than white. The color of the recording medium 91 and the color of the vector-type object 92a of the image 92 are within a specific color difference range. In addition, a region 92b that is a region other than the object 92a in the image 92 is a colorless and transparent region.

  When the medium color 32b of the paper feed tray 24 on which the recording medium 91 shown in FIG. 9A is placed is appropriately set in the paper feed tray information 32, the image 92 shown in FIG. 9B is printed. When the MFP 20 receives print data for use in this print data and the paper feed tray 24 on which the recording medium 91 shown in FIG. 9A is placed is specified by the medium color name 32a in the print data, the MFP 20 In step S131, after executing steps S131 and S132, the process proceeds to YES in steps S133, S135, and S136. If the MFP 20 determines in S137 that the visibility improving print button 82 has been pressed, it executes the processes in S138, S139, and S140, and then executes the process in S134. Therefore, the MFP 20 discharges the printed matter 93 shown in FIG.

  FIG. 10 is a diagram showing a printed matter 93 by the MFP 20.

  In FIG. 10, hatching represents a color other than white. The color of the recording medium 91 and the color of the contour 92c of the object 92a are outside the range of a specific color difference. In the image 92, the region 92b and the region 92d in the outline 92c of the object 92a are colorless and transparent. Therefore, the color of the recording medium 91 can be seen as it is in the region 92b and the region 92d of the printed matter 93.

  As described above, the MFP 20 determines that the color of the vector format object 92a in the print data is a color within a specific color difference range with respect to the color of the recording medium 91 (YES in S135, YES in S136). Since the color of the contour 92c of the object 92a is set to a color outside the specific color difference range with respect to the color of the recording medium 91 (S138, S139), the color of the image printed on the recording medium 91 of a color other than white is set. Visibility can be improved.

  Note that even if the color of the region in the raster format object in the print data is a color within a specific color difference range with respect to the color of the recording medium 91, the MFP 20 has the color of the contour of this region. Is not set to a color outside the range of a specific color difference with respect to the color of the recording medium 91. This is because when the outline of this region is made conspicuous, the atmosphere of the original image often changes.

  When the color of the vector format object 92a in the print data is within a specific color difference range with respect to the color of the recording medium 91 (YES in S135, YES in S136), the MFP 20 outlines the object 92a. Since the color of the inner region 92d is eliminated (S138), consumption of a colorant such as toner can be suppressed.

  As shown in FIG. 11, the MFP 20 may print as it is without erasing the color of the area 92d in the outline 92c of the object 92a.

  The MFP 20 receives the designation of the supply source of the recording medium 91 in the print data, so that the color of the recording medium 91 used in generating the print image data is determined. Therefore, the MFP 20 uses the recording medium 91 used in generating the print image data. Compared with a configuration in which the user must specify the color together with the print data, the operation by the user can be facilitated.

  Further, when the MFP 20 receives the designation of the supply source of the recording medium 91 by the name of the color of the recording medium 91, the MFP 20 corrects the image for improving the visibility. It is possible to reduce the possibility that a supplier who performs image correction is erroneously designated by the user when correction is not desired by the user.

  Note that the MFP 20 receives a method other than the method of accepting the designation of the supply source of the recording medium 91 by the color name of the recording medium 91, for example, the case of accepting the direct designation of the paper feed tray 24, or the size of the recording medium 91 Even when an indirect designation of the supply source of the recording medium 91 is received by the type of the recording medium 91 or the like, the process may proceed to S135 after the process of S132.

  Further, since the MFP 20 can accept the color of the recording medium 91 by reading the recording medium 91 by the scanner 26, the user can easily set the color of the recording medium 91.

  In this embodiment, the MFP 20 executes the process of S137 after YES in S136, but may execute the process of S138 without executing the process of S137. good.

  The color image forming apparatus of the present invention is an MFP in the present embodiment, but may be a color image forming apparatus other than the MFP, such as a dedicated printer.

20 MFP (color image forming apparatus)
23 Printer (printing device)
24 Paper feed tray (medium supply unit)
26 Scanner (reading device)
31 Image forming program 32a Medium color name 32b Medium color 41 Medium color name receiving means 42 Medium color receiving means 43 Print data receiving means 44 Print data receiving means 45 Print control means 91 Print control means 91 Recording medium 92 Image 92a Object 92c Contour 92d Area

Claims (6)

A printing device capable of printing a color image on a recording medium, a print data receiving means for receiving print data,
Medium color accepting means for accepting numerically the medium color that is the color of the recording medium, and print image data that is image data for printing by the printing device based on the print data accepted by the print data accepting means Printing image data generation means for generating;
Printing control means for printing an image based on the printing image data generated by the printing image data generation means on the recording medium by the printing device,
The printing image data generation unit has a color difference of a vector format in the print data received by the print data receiving unit with respect to the medium color received by the medium color receiving unit. When the color is within the range, the color of the outline of the object is set to a color outside a specific color difference range with respect to the medium color received by the medium color receiving unit, and the print image data is generated. A color image forming apparatus.   The printing image data generation unit is configured such that a color of the object in the vector format in the print data received by the print data receiving unit is a specific color difference with respect to the medium color received by the medium color receiving unit. 2. The color image forming apparatus according to claim 1, wherein the color image forming apparatus generates the print image data by eliminating the color of the area in the outline of the object when the color is within the range of 2. A medium supply unit for supplying the recording medium;
The medium color accepting unit accepts the medium color for each medium supply unit,
The medium color used by the printing image data generation unit in generating the printing image data is for the medium supply unit specified as the supply source of the recording medium to the printing device in the print data. The color image forming apparatus according to claim 1, wherein the medium color is received by the medium color receiving unit. A medium color name receiving unit that receives a medium color name that is a color name of the recording medium for each medium supply unit;
4. The color image forming apparatus according to claim 3, wherein the supply source of the print data is specified by the medium color name received by the medium color name receiving unit. It has a reading device that reads images from a document,
The color image forming apparatus according to claim 1, wherein the medium color receiving unit receives a color of the recording medium read by the reading device. An image forming program executed by a color image forming apparatus provided with a printing device capable of printing a color image on a recording medium,
A print data receiving step for receiving print data;
A medium color receiving step of receiving a medium color which is a color of the recording medium as a numerical value;
A printing image data generation step for generating printing image data which is image data for printing by the printing device based on the printing data received by the printing data reception step;
Causing the color image forming apparatus to execute a printing control step of printing an image based on the printing image data generated by the printing image data generation step on the recording medium by the printing device;
In the print image data generation step, the color of the vector-format object in the print data received by the print data reception step has a specific color difference with respect to the medium color received by the medium color reception step. When the color is within the range, the color of the outline of the object is set to a color outside a specific color difference range with respect to the medium color received by the medium color receiving step, and the print image data is generated. An image forming program comprising the steps of:

Images