JP2012183796A - Image processing apparatus, image forming apparatus, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine whether a coded image is readable when output on a printing medium without actually outputting the coded image on the printing medium.SOLUTION: A coded-image detection section 33 detects an image of a QR code (R) consisting of light and dark modules from among print data stored in a print data storage section 32 and instructed to be output. A readability determination section 35 acquires the color information of a print sheet, on which the print data including the QR code is to be output, from a sheet information storage section 34 on the basis of the information of a sheet tray predetermined by a print job, and then determines whether the QR code is readable when output on the print sheet on the basis of the color information of the light and dark modules constituting the detected QR code and the color information of the print sheet, on which the print data including the QR code is to be output.

Description

  The present invention relates to an image processing apparatus, an image forming apparatus, and a program.

  In Patent Document 1, when a code image is provided so as to overlap with readable information on a sheet, an intermediate layer is provided between the code image and the sheet so as to limit the light transmission rate to a predetermined ratio. A method for improving the above is disclosed.

  Patent Document 2 discloses an image processing apparatus that determines the readability of a printed code image by printing the code image on a sheet and reading and collating the printed code image.

JP 2000-268120 A JP 2008-204081 A

  An object of the present invention is to provide an image processing apparatus, an image forming apparatus, and a program capable of determining readability when a code image is output on a print medium without actually outputting the code image on the print medium. It is to be.

[Image processing device]
According to the first aspect of the present invention, there is provided detection means for detecting a code image composed of a bright area and a dark area from print data instructed to be output.
Based on the color information of the light area and the dark area constituting the code image detected by the detecting means and the color information of the print medium to which the print data including the code image is to be output, the code image is output on the print medium. And an image processing apparatus including determination means for determining readability in the case.

  According to a second aspect of the present invention, the determination means calculates the brightness of the bright area and the brightness of the dark area after printing based on the color information of the print medium, and calculates the brightness and darkness of the calculated bright area after printing. The contrast difference between the bright area and the dark area is calculated based on the luminance of the area, and the readability when the code image is output on the print medium is determined by comparing the calculated contrast difference with a preset threshold value. An image processing apparatus according to claim 1.

  According to a third aspect of the present invention, the determination means synthesizes the code image after printing based on the color information of the bright area and the dark area constituting the code image and the color information of the print medium, and the synthesized code image The image processing apparatus according to claim 1, wherein readability is determined when a code image is output on a print medium based on whether or not decoding is possible.

The present invention according to claim 4 further comprises storage means for storing the print medium storage container and the color information of the stored print medium in correspondence with each other,
The said determination means acquires the color information of the printing medium which is going to output the printing data containing a code image from the said memory | storage means based on the information of the designated storage container. An image processing apparatus.

  According to the fifth aspect of the present invention, when it is determined that the code image is not readable when the code image is output on the print medium designated by the determination unit, the color information of the bright area and the color of the dark area of the code image are determined. The image processing apparatus according to claim 1, further comprising a changing unit that changes at least one of the information.

  According to the sixth aspect of the present invention, the color information of the bright area and the color of the dark area of the code image are determined when it is determined by the determining means that the code image is not readable when output on the designated print medium. 5. The image processing apparatus according to claim 1, further comprising changing means for changing at least one of the information and the output density of the image forming material.

  The present invention according to claim 7 changes the print medium that outputs the print data including the code image when it is determined by the determination means that the code image is output on the designated print medium and cannot be read. The image processing apparatus according to claim 1, further comprising a changing unit configured to perform the change.

  In the present invention according to claim 8, when the code means outputs a code image on a designated print medium and the decision means determines that the code image cannot be read, only the code image has a color different from that of the designated print medium. 5. The image processing apparatus according to claim 1, further comprising a changing unit configured to change the output so as to output to a print medium including

  The present invention according to claim 9 controls to stop outputting the instructed print data when it is determined by the determining means that the code image is output on the designated print medium and cannot be read. 5. The image processing apparatus according to claim 1, further comprising a control unit.

  According to the tenth aspect of the present invention, in the case where the determination unit determines that a code image is output on a designated print medium, the code is output when the print data is output on the designated print medium. 5. The image processing apparatus according to claim 1, further comprising notification means for notifying that an image becomes unreadable.

[Image forming equipment]
According to the eleventh aspect of the present invention, there is provided detection means for detecting a code image composed of a bright area and a dark area from print data instructed to be output.
Based on the color information of the light area and the dark area constituting the code image detected by the detecting means and the color information of the print medium to which the print data including the code image is to be output, the code image is output on the print medium. Determining means for determining readability of the case;
An image forming unit comprising: an image output unit configured to output print data including a code image onto a designated print medium when the determination unit determines that the code image printed on the print medium is readable. Device.

[program]
The present invention according to claim 12 includes a step of detecting a code image composed of a bright region and a dark region from print data instructed to be output;
The readability when the code image is output on the print medium based on the color information of the light area and the dark area constituting the detected code image and the color information of the print medium to which the print data including the code image is to be output. A program for causing a computer to execute the determining step.

  According to the first aspect of the present invention, there is provided an image processing apparatus capable of determining readability when a code image is output on a print medium without actually outputting the code image on the print medium. be able to.

  According to the second aspect of the present invention, in addition to the effect obtained by the first aspect of the present invention, it is possible to easily determine the readability of the code image only by calculating the contrast difference between the dark region and the bright region. An image processing apparatus can be provided.

  According to the third aspect of the present invention, in addition to the effect obtained by the first aspect of the present invention, an image capable of determining readability that approximates readability when a code image is actually read and decoded. A processing device can be provided.

  According to the fourth aspect of the present invention, in addition to the effect obtained by the present invention according to any one of the first to third aspects, the print medium can be printed without requiring processing for reading the color information of the print medium. It is possible to provide an image processing apparatus capable of acquiring the color information.

  According to the fifth aspect of the present invention, in addition to the effect obtained by the present invention according to any one of the first to fourth aspects, compared with a case where the code image is output as it is to the designated print medium. An image processing apparatus capable of improving the readability of the code image can be provided.

  According to the sixth aspect of the present invention, in addition to the effect obtained by the present invention according to any one of the first to fourth aspects, compared with a case where the code image is directly output to the designated print medium. An image processing apparatus capable of improving the readability of the code image can be provided.

  According to the seventh aspect of the present invention, in addition to the effect obtained by the present invention according to any one of the first to fourth aspects, as compared with the case where the code image is directly output to the designated printing medium. An image processing apparatus capable of improving the readability of the code image can be provided.

  According to the present invention of claim 8, in addition to the effect obtained by the present invention of any one of claims 1 to 4, there is a situation in which the code image output on the print medium becomes unreadable. It is possible to provide an image processing apparatus capable of preventing the occurrence and enabling reading of a code image.

  According to the present invention of claim 9, in addition to the effect obtained by the present invention of any one of claims 1 to 4, there is a situation in which the code image output on the print medium becomes unreadable. An image processing apparatus capable of preventing the occurrence can be provided.

  According to the tenth aspect of the present invention, in addition to the effect obtained by the present invention according to any one of the first to fourth aspects, the code image output on the print medium cannot be read. An image processing apparatus that can notify a user in advance can be provided.

  According to the eleventh aspect of the present invention, there is provided an image forming apparatus capable of determining readability when a code image is output on a print medium without actually outputting the code image on the print medium. be able to.

  According to the present invention of claim 12, it is possible to provide a program capable of determining readability when a code image is output on a print medium without actually outputting the code image on the print medium. it can.

1 is a diagram illustrating a system configuration of an image forming system according to an embodiment of the present invention. 1 is a block diagram illustrating a hardware configuration of an image forming apparatus 10 according to an embodiment of the present invention. 1 is a block diagram illustrating a functional configuration of an image forming apparatus 10 according to an embodiment of the present invention. FIG. 6 is a diagram illustrating an example of print data including a QR code. FIG. 6 is a diagram illustrating an example of a case where a QR code image after printing is combined based on a QR code image and color information of a printing paper. 6 is a flowchart illustrating an operation in a paper tray paper color setting mode in the image forming apparatus 10 according to the embodiment of the present invention. 7 is a flowchart illustrating an operation in a setting mode of a coping method when the QR code contrast is insufficient in the image forming apparatus 10 according to the embodiment of the present invention. 6 is a flowchart illustrating an operation when a print job is executed in the image forming apparatus 10 according to the embodiment of the present disclosure. 10 is a flowchart for explaining detailed operations of the QR code readability determination processing (step S307) shown in FIG. 8; FIG. 9 is a flowchart for explaining detailed operations of a process (step S310) for executing the set coping method shown in FIG.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an image forming system according to an embodiment of the present invention.

  As shown in FIG. 1, the image forming system according to an embodiment of the present invention includes an image forming apparatus 10 and a terminal device 20 connected to each other via a network 30. The terminal device 20 generates a print job (print instruction) and transmits the print job generated via the network 30 to the image forming apparatus 10. The image forming apparatus 10 receives the print job transmitted from the terminal device 20 and outputs an image corresponding to the print job on a sheet. The image forming apparatus 10 is an apparatus called a so-called multi-function machine having a plurality of functions such as a print function, a scan function, a copy function, and a facsimile function.

  Next, FIG. 2 shows a hardware configuration of the image forming apparatus 10 in the image forming system of the present embodiment.

  As shown in FIG. 2, the image forming apparatus 10 transmits and receives data to and from an external device or the like via a CPU 11, a memory 12, a storage device 13 such as a hard disk drive (HDD), and a network 30. A communication interface (IF) 14, a touch panel or liquid crystal display, and a user interface (UI) device 15 including a keyboard, a scanner 16, and a print engine 17 are included. These components are connected to each other via a control bus 18.

  The CPU 11 executes predetermined processing based on a control program stored in the memory 12 or the storage device 13 and controls the operation of the image forming apparatus 10.

  In the present embodiment, the CPU 11 has been described as reading and executing a control program stored in the memory 12 or the storage device 13, but the program is stored in a storage medium such as a CD-ROM and stored in the CPU 11. It is also possible to provide.

  FIG. 3 is a block diagram showing a functional configuration of the image forming apparatus 10 realized by executing the control program.

  As shown in FIG. 3, the image forming apparatus 10 of the present exemplary embodiment includes an image processing device 40 and an image output unit 50. In the present embodiment, in order to simplify the description, the description of the configuration related to the control of the printing process is omitted.

  Further, as shown in FIG. 3, the image processing apparatus 40 includes a development processing unit 31, a print data storage unit 32, a code image detection unit 33, a paper information storage unit 34, a readability determination unit 35, and a notification. A unit 36 and a change unit 37 are provided.

  The expansion processing unit 31 generates print data by performing expansion processing (decompose processing) on a print instruction (print job) received from the terminal device 20 or the like via the network 30. The print data storage unit 32 stores the print data generated by the expansion processing unit 31.

  The code image detection unit 33 includes a QR (Quick Response) code composed of a light module (bright region) and a dark module (dark region) from the print data instructed to be output stored in the print data storage unit 32. A code image of (registered trademark) is detected.

  For example, if there is print data as shown in FIG. 4, the code image detection unit 33 detects an image of the QR code 60 from the image of the print data. The image of the QR code 60 is composed of two types of modules, a bright module 61 and a dark module 62, and various information can be embedded based on the arrangement of the bright module 61 and the dark module 62. ing.

  The paper information storage unit 34 stores the paper tray (storage container) of the printing paper (printing medium) and the color information of the stored printing paper in association with each other.

  The readability determination unit 35 acquires color information of a print paper on which print data including a QR code is to be output from the paper information storage unit 34 based on the information on the paper tray specified by the print job.

  Then, the readability determination unit 35 converts the color information of the light module and the dark module constituting the QR code image detected by the code image detection unit 33 and the color information of the printing paper on which print data including the QR code is to be output. Based on this, the readability when the QR code is output on the printing paper is determined.

  For example, when the QR code as shown in FIG. 4 is output on printing paper other than white, the QR code image after printing is the image shown in FIG. 5 in consideration of the color information of the printing paper. Become. That is, since the color is not designated for the light module 61, the color of the printing paper is directly used as the color of the light module 61 after printing, but the original module is designated black for the dark module 62. The color specified for the dark module 62 becomes the color of the dark module 62 after printing with almost no influence of the color of the printing paper.

  Specifically, the readability determination unit 35 calculates the brightness of the light module and the brightness of the dark module after printing based on the color information of the printing paper, and calculates the brightness of the light module and the brightness of the dark module after printing. The contrast difference between the light module and the dark module is calculated by the above, and the readability when the QR code is output on the printing paper is determined by comparing the calculated contrast difference with a preset threshold value.

For example, when the color information of the light module and the dark module is expressed by RGB color components, the luminance of each module is calculated by the following equation.
Luminance = (R × 299 + G × 587 + B × 144) / 1000

The contrast difference between the light module and the dark module is calculated by the following equation.
Contrast difference = Bright module brightness-Dark module brightness

  For example, the case where the RGB value of the light module is (125, 200, 100) and the RGB value of the dark module is (20, 15, 10) will be described.

In this case, the brightness of the light module and the brightness of the dark module are calculated by the following equations.
Brightness of light module = (125 × 299 + 200 × 587 + 100 × 144) 1000≈169
Brightness of dark module = (20 × 299 + 15 × 587 + 10 × 144) 1000≈16

  Therefore, the contrast difference between the light module and the dark module in this case is 153 (169-16). Then, the contrast difference value 153 is compared with a preset threshold value, and the contrast difference value is smaller than this threshold value. If it is larger, the readability determination unit 35 determines that the QR code after printing can be read.

  Alternatively, the readability determination unit 35 synthesizes the QR code image after printing based on the color information of the light module and the dark module that form the QR code and the color information of the printing paper, and simulates the synthesized QR code image. The readability when the QR code is output on the printing paper may be determined by simulating and determining whether or not decoding is possible.

  When the readability determination unit 35 determines that the notification unit 36 cannot read the QR code image on the designated print paper and outputs the print data on the designated print paper, the QR code is output. Is notified to the user that it becomes unreadable.

  When the change unit 37 determines that reading is impossible when the QR code is output on the printing paper designated by the readability determination unit 35, the change unit 37 uses one coping method selected in advance from a plurality of coping methods. Any change is made to the QR code image in the print data.

  For example, when the coping method “change the color of the QR code image” is selected, the changing unit 37 changes at least one of the color information of the light module and the dark module constituting the QR code. In this case, for example, when the color designation is designated with 256 gradations for each of the CMYK4 colors, the color designation of the light module is not 0 for all color components, and a value other than 0 is set for some color components. If set, the changing unit 37 changes the designation of the bright module color to the designation CMYK = (0, 0, 0, 0). When the dark module color designation is K = 200, the changing unit 37 changes the dark module color designation to the highest value of K = 255.

  Further, for example, when the coping method “change the color and toner density of the QR code image” is selected, the changing unit 37 selects at least one of the light module color information and the dark module color information of the QR code, And the output density of the toner (image forming material) is changed. For example, when the color of the printing paper is dark gray, the color of the light module is also dark gray. Therefore, the changing unit 37 changes the color of the light module to yellow and the dark gray color of the printing paper is changed. Change the toner density to the highest value so that it is hidden.

  Further, for example, when the coping method “change output paper” is selected, the changing unit 37 changes the print paper itself that outputs the print data including the QR code. For example, when a gray print sheet is specified in the print job, if the QR code is output on the print sheet specified by the readability determination unit 35 and it is determined that reading is impossible, the changing unit 37 By switching the paper tray to be used, white print paper is used as print paper for outputting print data.

  Furthermore, when the coping method “output QR code image to another sheet” is selected, the changing unit 37 outputs only the QR code image to a printing paper of a color different from the designated printing paper, for example, white printing paper. To change

  The changing unit 37 is configured to stop the output of the instructed print data when the readability determining unit 35 determines that the QR code is output on the designated printing paper and cannot be read. 50 may be controlled.

  If the readability determination unit 35 determines that the reading becomes impossible when the QR code is output on the designated printing paper, the changing unit 37 automatically executes the above-described countermeasure. Alternatively, the selected coping method may be executed by temporarily stopping the print job and causing the user to select the coping method.

  When the readability determination unit 35 determines that the QR code printed on the print paper can be read, the image output unit 50 outputs print data including the QR code on the designated print paper.

  Next, the operation of the image forming apparatus 10 of this embodiment will be described in detail with reference to the drawings.

First, the operation for setting the paper color of the paper tray will be described with reference to the flowchart of FIG.
In this case, the image forming apparatus 10 causes the user to specify a paper tray on which printing paper is set (step S101). Next, the image forming apparatus 10 instructs the user to scan one sheet of printing paper set on the paper tray (step S102).

  Then, when the user scans one sheet of printing paper set on the paper tray, the image forming apparatus 10 acquires color information of the scanned printing paper (step S103).

  Finally, the color information of the scanned printing paper is stored in the paper information storage unit 34 in association with the paper tray designated in step S101 (step S104). In this way, the color information associated with each paper tray is stored in the paper information storage unit 34.

  Next, the operation when setting a countermeasure when the QR code contrast is insufficient will be described with reference to the flowchart of FIG.

  First, the user is prompted to input on / off selection for automatic handling (step S201). When the setting to turn on automatic handling is selected in step S201 (Yes in step S202), the user is allowed to select one handling method from a plurality of prepared handling methods (step S203). ).

  Specifically, “change the color of the QR code image”, “change the color and toner density of the QR code image”, “change the output paper”, “output the QR code image to another paper”, “print data The user is made to select which coping method is to be performed from a plurality of coping methods such as “cancel output”.

  When the coping method to be executed by the user is selected, the setting for performing automatic coping and the selected coping method are stored in the changing unit 37 (step S204).

  If the setting for turning off automatic handling is selected in step S201 (No in step S202), the setting for not performing automatic handling is stored in the changing unit 37 (step S205).

  Next, the operation when a print job is actually executed in the image forming apparatus 10 will be described with reference to the flowchart of FIG.

  First, a decompression processing unit 31 executes a decomposing process on a print job input by the terminal device 20 or the like to generate raster format print data (step S301). The generated print data is stored in the print data storage unit 32.

  Then, the code image detection unit 33 executes processing for detecting whether or not a QR code image is included in the generated print data, and if included, the QR code image (step S31). S302).

  If it is determined in step S302 that the QR code is not included in the print data, the image output unit 50 executes print processing based on the generated print data (step S309).

  When it is determined in step S302 that the print data includes a QR code, the code image detection unit 33 acquires an image of the QR code included (step S304).

  Since the paper tray to be used is specified for the print job to be executed, the output destination paper tray is determined based on this specification (step S305).

  Then, the readability determination unit 35 acquires the color information of the printing paper in the output destination tray from the paper information storage unit 34 based on the determined paper tray information (step S306).

  Then, the readability determination unit 35 converts the color information of the light module and the dark module constituting the QR code image detected by the code image detection unit 33 and the color information of the printing paper on which print data including the QR code is to be output. Based on this, the readability when the QR code is output on the printing paper is determined (step S307). The details of the readability determination process will be described later.

  If it is determined in step S307 that there is no problem in readability, that is, it is determined that the QR code can be read even if the print data is output on the designated printing paper (Yes in step S308), the image output unit 50 The print data is output on the designated print paper (step S309).

  If it is determined in step S307 that there is a problem in readability, that is, it is determined that there is a high possibility that the QR code cannot be read when print data is output on the designated printing paper (No in step S308), the image change unit 37 A pre-set handling method is executed (step S310). Details of the execution method of this coping method will also be described later.

  Next, details of the readability determination process when the QR code is output on the printing paper described in step S307 of FIG. 8 will be described with reference to the flowchart of FIG.

  First, the readability determination unit 35 acquires a setting as to which determination method is used as the readability determination method (step S401). Then, the readability determination unit 35 determines whether the set determination method is a determination method based on contrast or a determination method based on simulation (step S402).

  If the determination method set in step S402 is a determination method based on contrast (Yes in step S402), the readability determination unit 35 determines the color of the bright module from the QR code image detected by the code image detection unit 33. The color of the dark module is acquired (step S403).

  Then, the readability determination unit 35 grasps the output destination tray from the paper tray information, and acquires the paper information of the paper set in the output destination tray from the paper information storage unit 34. Then, the readability determination unit 35 calculates the color of the bright module and the color of the dark module after printing based on the acquired paper information (step S404). Then, the readability determination unit 35 calculates a contrast difference (contrast ratio) between the bright module and the dark module (step S405).

  Finally, the readability determination unit 35 determines the readability of the QR code based on the calculated contrast difference (step S406). Specifically, for example, the readability determination unit 35 determines that the QR code is readable when the contrast difference is equal to or greater than a certain threshold value, and the contrast difference is less than the certain threshold value. In this case, it is determined that the QR code cannot be read.

  If the determination method set in step S402 is a simulation determination method (No in step S402), the readability determination unit 35 synthesizes the printed QR code image based on the paper information of the output destination tray. (Step S407).

  Then, the readability determination unit 35 determines whether or not the synthesized QR code image can be decoded by simulation (step S408). Specifically, the readability determination unit 35 performs the decoding process on the assumption that the synthesized QR code image is a QR code image extracted from the actually read image, and decodes the original information if the original information is decoded. Judgment is possible.

  Finally, when the synthesized QR code image can be decoded, the readability determination unit 35 determines that the QR code after printing is readable, and when the synthesized QR code image cannot be decoded. Determines that the QR code after printing cannot be read (step S409).

  Next, details of the execution processing of the set countermeasure method described in step S310 of FIG. 8 will be described with reference to the flowchart of FIG.

  In this process, first, the set countermeasures are “change QR code image color”, “output QR code image to another sheet”, “change output sheet”, “change QR code image color and toner density”. It is determined whether or not any of “change” is true (steps S501, S504, S507, and S510).

  When the set countermeasure is “change the color of the QR code image” (Yes in step S501), the changing unit 37 changes the light module of the QR code image to white and the dark module to black ( Step S502).

  Then, based on the print data after the color code of the QR code image is changed by the changing unit 37, the image output unit 50 performs a printing process (step S503).

  If the set coping method is “output QR code image to another sheet” (Yes in step S504), it is first determined whether or not there is a sheet tray set with white sheet (step S505). If there is a paper tray for white paper, a print job for outputting only a QR code image to white paper is added after the job being executed (step S506).

  As a result, in the printing process, after the execution of the original print job is completed, the printing process is executed so that only the QR code image is output on the white paper (step S503). If it is determined in step S505 that there is no paper tray set with white paper, the print job is interrupted (step S513).

  If the set coping method is “change output paper” (Yes in step S507), first, it is determined whether or not there is a paper tray set with white paper (step S508). If there is a paper tray, the paper tray to be used is changed to a paper tray set with white paper (step S509).

  As a result, in the printing process, an image based on the print data is output on a white paper different from the paper designated in the print job (step S503). If it is determined in step S508 that there is no paper tray set with white paper, the print job is interrupted (step S513).

  When the set countermeasure is “change the color and toner density of the QR code image” (Yes in step S510), for example, the changing unit 37 changes the light module of the QR code image to yellow and the dark module. The color is changed to black (step S511). Then, the changing unit 37 sets the toner density of the image portion of the QR code image to be, for example, the highest value (step S512).

  Then, based on the print data after the color code of the QR code image is changed by the changing unit 37, the image output unit 50 performs a printing process (step S503).

  Note that if the corresponding coping method is not set in any of steps S501, S504, S507, and S510, the entire print job processing is interrupted (step S513).

[Modification]
In the above embodiment, a case has been described in which a QR code, which is one of two-dimensional codes, is included in print data and the readability of this QR code is determined. However, the present invention is not limited to this. The present invention can be similarly applied to the case of determining the readability of a two-dimensional code other than a QR code, for example, a code image such as MaxiCode or Data Matrix. Furthermore, the present invention is not limited to the determination of the readability of an image of a two-dimensional code, but can be similarly applied to the determination of the readability of another code image such as a one-dimensional code such as a barcode.

10 Image forming apparatus 11 CPU
12 Memory 13 Storage Device 14 Communication Interface (IF)
DESCRIPTION OF SYMBOLS 15 User interface (UI) apparatus 16 Scanner 17 Print engine 18 Control bus 20 Terminal apparatus 30 Network 31 Expansion | deployment process part 32 Print data storage part 33 Code image detection part 34 Paper information storage part 35 Readability determination part 36 Notification part 37 Change part 60 QR code 61 light module 62 dark module

Claims (12)

Detection means for detecting a code image composed of a bright area and a dark area from print data instructed to be output;
Based on the color information of the light area and the dark area constituting the code image detected by the detecting means and the color information of the print medium to which the print data including the code image is to be output, the code image is output on the print medium. Determining means for determining readability of the case;
An image processing apparatus.   The determination means calculates the brightness of the bright area after printing and the brightness of the dark area based on the color information of the print medium, and determines the brightness of the bright area and the dark area based on the calculated brightness of the bright area and the brightness of the dark area. 2. The image processing apparatus according to claim 1, wherein a readability when a code image is output on a print medium is determined by calculating a contrast difference between the code image and comparing the calculated contrast difference with a preset threshold value.   Whether the determination means is capable of synthesizing the code image after printing based on the color information of the bright area and the dark area constituting the code image and the color information of the print medium, and decoding the synthesized code image to decode it. The image processing apparatus according to claim 1, wherein readability is determined when a code image is output on a print medium depending on whether or not the code image is output. A storage means for storing the print medium storage container and the color information of the stored print medium in association with each other;
The said determination means acquires the color information of the printing medium which is going to output the printing data containing a code image from the said memory | storage means based on the information of the designated storage container. Image processing device.   A change that changes at least one of the color information of the bright area and the color information of the dark area of the code image when it is determined that the code image is output on the print medium designated by the determination unit. The image processing apparatus according to claim 1, further comprising means.   When the determination unit determines that the code image is output on the designated print medium and cannot be read, at least one of the light area color information and the dark area color information of the code image, and the image shape The image processing apparatus according to claim 1, further comprising changing means for changing the output density of the material.   A change means for changing a print medium that outputs print data including a code image when the determination means determines that a code image is output on a designated print medium and cannot be read. The image processing apparatus according to any one of 1 to 4.   If the determination means determines that the code image is output on the designated print medium and cannot be read, only the code image is output to a print medium having a color different from that of the designated print medium. The image processing apparatus according to claim 1, further comprising changing means for changing.   2. The control device according to claim 1, further comprising a control unit configured to control to stop outputting the designated print data when the determination unit determines that the code image is not readable when the code image is output on the designated print medium. 5. The image processing apparatus according to any one of items 1 to 4.   If the determination means determines that the code image is output on the specified print medium and cannot be read, it indicates that the code image cannot be read when the print data is output on the specified print medium. The image processing apparatus according to claim 1, further comprising notification means for notifying. Detection means for detecting a code image composed of a bright area and a dark area from print data instructed to be output;
Based on the color information of the light area and the dark area constituting the code image detected by the detecting means and the color information of the print medium to which the print data including the code image is to be output, the code image is output on the print medium. Determining means for determining readability of the case;
An image output means for outputting print data including the code image on the designated print medium when the determination means determines that the code image printed on the print medium can be read;
An image forming apparatus. Detecting a code image composed of a bright area and a dark area from print data instructed to be output;
The readability when the code image is output on the print medium based on the color information of the light area and the dark area constituting the detected code image and the color information of the print medium to which the print data including the code image is to be output. A program for causing a computer to execute the determining step.

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