JP2020170386A - Image forming device, print setting change method, and print setting change program - Google Patents

Abstract

To provide an image forming device, a print setting change method, and a print setting change program capable of setting print setting conditions suitable for an image having periodicity.SOLUTION: An image forming device, which is equipped with a recording head having a plurality of recording elements, includes a feature quantity detection unit configured to detect the feature quantity of input image data, an image type determination unit configured to determine the type of the input image data based on the feature quantity detected by the feature quantity detection unit, and a print setting change unit configured to change print setting conditions according to the determination result of the image type determination unit. The feature quantity detection unit detects, as the feature quantity, the periodicity of the input image data.SELECTED DRAWING: Figure 2

Description

The present invention relates to an image forming apparatus, a print setting change method, and a print setting change program.

Conventionally, there is known an image forming apparatus that determines a feature amount of input image data and changes a print setting to a condition according to the feature amount. Such an image forming apparatus can avoid setting printing conditions every time when printing an image having a feature amount similar to the feature amount of an image printed in the past.

For example, in the configuration described in Patent Document 1, a print condition parameter similar to the calculation result of the feature amount of the input image data is acquired, and the print process is performed using the print condition parameter. Further, in the configuration described in Patent Document 2, when the calculation result of the feature amount of the input image data satisfies a specific condition, image processing is performed according to the condition, and when the calculation result does not satisfy the specific condition, the configuration is performed. A condition corresponding to the calculation result is added to a specific condition.

Japanese Unexamined Patent Publication No. 2006-185321 JP-A-2005-07940

By the way, when the input image data is an image having periodic repetitions such as an image in which the same pattern is repeated a plurality of times or an image having a predetermined periodic function curve, the printing conditions suitable for the image are set. Must be set. Specifically, when an image forming device using a recording head having a plurality of recording elements prints an image having periodicity, image defects such as streaks, unevenness, and image misalignment become more noticeable, so that the image is finer. It is necessary to set the printing conditions.

However, the configurations described in Patent Document 1 and Patent Document 2 are suitable for images having periodicity because they are configured to perform printing processing or image processing under printing conditions according to the feature amount of the image recorded in the apparatus. It was difficult to set the printing conditions.

An object of the present invention is to provide an image forming apparatus, a print setting change method, and a print setting change program that can be set to print setting conditions suitable for an image having periodicity.

The image forming apparatus according to the present invention is
An image forming apparatus including a recording head having a plurality of recording elements.
A feature amount detection unit that detects the feature amount of input image data,
An image type determination unit that determines the type of input image data based on the feature amount detected by the feature amount detection unit, and an image type determination unit.
A print setting change unit that changes print setting conditions suitable for the determination result of the image type determination unit, and a print setting change unit.
With
The feature amount detection unit detects the periodicity of the input image data as the feature amount.

The printing setting changing method according to the present invention is
A method for changing print settings of an image forming apparatus including a recording head having a plurality of recording elements.
Detects the periodicity of the input image data as a feature quantity,
The type of the input image data is determined based on the detected feature amount, and
The print setting conditions suitable for the determination result of the type of input image data are changed.

The print setting change program according to the present invention
A print setting change program for an image forming apparatus including a recording head having a plurality of recording elements.
On the computer
Feature detection processing that detects the periodicity of input image data as a feature,
Image type determination processing for determining the type of input image data based on the feature amount detected by the feature amount detection process, and
The print setting change process for changing the print setting conditions suitable for the judgment result of the image type judgment process, and the print setting change process.
To execute.

According to the present invention, it is possible to set print setting conditions suitable for an image having periodicity.

It is a figure which shows the schematic structure of the image forming apparatus which concerns on 1st Embodiment of this invention. It is a block diagram which shows the main functional structure of the image forming apparatus which concerns on this embodiment. It is a figure which shows an example of the input image data. It is a figure for demonstrating the spatial frequency component after the Fourier transform of the image shown in FIG. It is a figure which shows an example of a print setting screen. It is a figure which shows the proposal example of the change of the print setting condition on a print setting screen. It is a flowchart which shows an example of the operation example at the time of executing the print setting change control in an image forming apparatus. It is a flowchart which shows an example of the operation example at the time of executing the print setting change control in an image forming apparatus. It is a figure which shows an example of the input image data. It is a figure which shows the color information in the horizontal direction at a predetermined position of the image shown in FIG.

Hereinafter, the first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of an image forming apparatus 1 according to a first embodiment of the present invention.

As shown in FIG. 1, the image forming apparatus 1 is an inkjet type image forming apparatus, and includes a belt conveying device 2, a recording head 3, and the like.

In the belt transport device 2, an endless transport belt 23 having a predetermined width is stretched over a drive roller 21 and a driven roller 22 arranged in parallel at a predetermined interval. The upper surface of the transport belt 23 bridged to the drive roller 21 and the driven roller 22 is a mounting surface on which the recording medium P is placed in close contact with the recording medium P.

The surface of the transport belt 23 is coated with an adhesive called grounding in order to bring the recording medium P being transported into close contact with the upper surface of the transport belt 23. Further, the drive roller 21 is driven by a sub-scanning motor (not shown).

In the belt transport device 2, the drive roller 21 is bridged with the driven roller 22 by rotating at a predetermined speed in the counterclockwise direction (see the arrow) in FIG. 1 by the rotational drive of the sub-scanning motor. The conveyor belt 23 is rotated and moved. By such an operation, the recording medium P mounted on the upper surface of the transport belt 23 is conveyed in the direction of arrow A in the drawing, which is the sub-scanning direction.

As the recording medium P, for example, a recording medium usually used for inkjet recording such as paper, cloth, a plastic film, and a glass plate can be used. The recording medium P may be in the form of a sheet cut to a predetermined size, or may be in the form of a long piece that is continuously unwound from the original winding wound in a roll shape.

A belt cleaning device (not shown) is provided on the side of the belt transport device 2 opposite to the transport surface of the recording medium P. The belt cleaning device removes foreign matter adhering to the transport belt 23.

The recording head 3 has a plurality of recording elements (injection heads), and is arranged at a predetermined interval above the surface on which the recording medium P is placed on the transport belt 23. The recording head 3 records a desired image on the recording medium P transported by the rotational movement of the transport belt 23 by ejecting ink droplets from a large number of nozzles provided on the lower surface thereof.

In the present embodiment, the recording head 3 is mounted on a carriage (not shown), and a shuttle-type recording head that reciprocates in the chief examiner direction orthogonal to the conveying direction of the recording medium P that is intermittently conveyed is used. In this case, at the time of recording, the drive of the drive roller 21 is controlled so that the transfer belt 23 performs an intermittent operation of repeating the standby state and the drive state.

The recording head 3 is a line-type recording head that is fixedly bridged over the width direction of the transport belt 23 and records an image by ejecting ink droplets on a recording medium P that is continuously transported. It may be. In this case, at the time of recording, the drive of the drive roller 21 is controlled so that the transfer belt 23 continuously moves (rotates).

FIG. 2 is a block diagram showing a main functional configuration of the image forming apparatus 1. The image forming apparatus 1 includes a control unit 100, a recording head drive unit 110, a transport drive unit 120, an input / output interface 130, a feature amount detection unit 140, an image type determination unit 150, a print setting acquisition unit 160, and a print setting change unit 170. Be prepared.

The control unit 100 includes a CPU 101 (Central Processing Unit), a RAM 102 (Random Access Memory), a ROM 103 (Read Only Memory), and a storage unit 104.

The CPU 101 reads out various control programs and setting data stored in the ROM 103, stores them in the RAM 102, executes the programs, and performs various arithmetic processes. Further, the CPU 101 comprehensively controls the overall operation of the image forming apparatus 1.

The RAM 102 provides the CPU 101 with a working memory space and stores temporary data. The RAM 102 may include a non-volatile memory.

The ROM 103 stores various control programs, setting data, and the like executed by the CPU 101. Instead of the ROM 103, a rewritable non-volatile memory such as an EEPROM (Electrically Erasable Programmable Read Only Memory) or a flash memory may be used.

The storage unit 104 stores a print job (image recording command) input from the external device 6 via the input / output interface 130 and image data related to the print job. As the storage unit 104, for example, an HDD (Hard Disk Drive) may be used, or a DRAM (Dynamic Random Access Memory) or the like may be used in combination.

The recording head drive unit 110 supplies a drive signal according to the image data to the recording head 3 at an appropriate timing based on the control of the control unit 100, thereby converting the pixel value of the image data from the nozzle of the recording head 3. Discharge the corresponding amount of ink.

The transport drive unit 120 rotates and moves the transport belt 23 at a predetermined speed and timing by supplying a drive signal to the sub-scanning motor of the drive roller 21 based on the control of the control unit 100.

The input / output interface 130 mediates the transmission / reception of data between the external device 6 and the control unit 100. The input / output interface 130 is composed of, for example, any of various serial interfaces, various parallel interfaces, or a combination thereof.

The external device 6 is, for example, a personal computer, and supplies an image recording command (print job), image data, and the like to the control unit 100 via the input / output interface 130.

The feature amount detection unit 140 detects the feature amount of the input image data input from the external device 6. The feature amount detection unit 140 detects the periodicity of the input image data as a feature amount. Specifically, the feature amount detection unit 140 detects the spatial frequency component for each color as a feature amount by performing a Fourier transform for each color of the input image data.

For example, as shown in FIG. 3, it is assumed that the geometric pattern of the black striped image, that is, the image G1 having periodic repetition is the input image data. The image G1 is an image tilted so as to be located on the upper side in the vertical direction toward the right side in the horizontal direction (horizontal direction).

When the feature amount detection unit 140 performs the Fourier transform on the image G1, the spatial frequency component as shown in FIG. 4 is acquired. In FIG. 4, the vertical axis is the vertical component of the frequency, and the horizontal axis is the horizontal component of the frequency. In the case of the image G1 shown in FIG. 3, for example, the spatial frequency component A1 in the second quadrant and the spatial frequency component A2 in the fourth quadrant in FIG. 4 are obtained. The spatial frequency components A1 and A2 have coordinate positions symmetrical with respect to the origin O.

The spatial frequency components A1 and A2 have larger values as the number of striped images in the image G1 of the input image data increases. That is, as the number of periodic repetitions in the image increases, the spatial frequency d corresponding to each distance between the spatial frequency components A1 and A2 and the origin O becomes longer. The feature amount detection unit 140 detects this spatial frequency d.

Although the feature amount detection unit 140 has detected by calculating the above-mentioned spatial frequency d, it is also possible to acquire the result of the calculation from the outside and detect the acquired value as the feature amount. Further, the color of the image G1 may be an RGB color or a CMYK color.

The image type determination unit 150 determines the type of input image data based on the feature amount detected by the feature amount detection unit 140. Specifically, the image type determination unit 150 has a period in which the input image data has periodic repetitions based on a comparison result between the spatial frequency d detected by the feature amount detection unit 140 and the size of the input image data. Determine if the image is included.

The image type determination unit 150 determines that the input image data includes a periodic image when the ratio of the wavelength to the size of the input image data is a predetermined value (for example, 1/10) or less. The wavelength is the reciprocal of the spatial frequency d. Further, the predetermined value can be appropriately set to a value such that the wavelength becomes smaller than the size of the input image data.

Here, the size of the input image data is the length of the diagonal line of the image G1 because the spatial frequency d is a distance based on both the vertical and horizontal components. The diagonal line is, for example, a line connecting the upper left vertex and the lower right vertex in the rectangular image G1.

Further, when the spatial frequency is a distance based only on the vertical component, the size of the input image data is the length of the image G1 in the vertical direction. Further, when the spatial frequency is a distance based only on the horizontal component, the size of the input image data is the length of the image G1 in the horizontal direction.

In this way, by using the wavelength smaller than the size of the input image data as a determination criterion, it can be easily determined that the input image data includes a periodic image having periodic repetition. ..

The print setting acquisition unit 160 acquires the print setting conditions of the input image data. The print setting conditions are, for example, as shown in FIG. 5A, each condition shown in the setting portion C on the print setting screen 6A on the external device 6. The image name, image type, length, width, resolution, density, and redundancy are shown in the setting portion C. In the initial setting of the print setting condition, for example, the print redundancy is set to a relatively low level.

Specifically, the print setting acquisition unit 160 acquires the print setting conditions of the input image data when the image type determination unit 150 determines that the input image data includes a periodic image. The print setting acquisition unit 160 determines whether or not the print setting condition is a print setting condition suitable for a periodic image.

The print setting condition suitable for the periodic image is, for example, a setting condition for increasing the number of scans in the recording head 3 to form a finer image. In the present embodiment, the print setting condition suitable for the periodic image is a condition for setting the above-mentioned print redundancy to a relatively high level.

When the print redundancy is high, the print setting acquisition unit 160 determines that the print setting condition is a print setting condition suitable for a periodic image. The print setting acquisition unit 160 determines that the print setting condition is not a print setting condition suitable for the periodic image when the print redundancy is not at a high level.

The print setting change unit 170 changes the print setting condition acquired by the print setting acquisition unit 160 to a print setting condition suitable for the determination result of the image type determination unit 150. Specifically, the print setting changing unit 170 prints suitable for the periodic image when the input image data includes the periodic image and the print setting conditions acquired by the print setting acquisition unit 160 are not suitable for the periodic image. Outputs a proposal command for changing settings to the setting conditions.

The setting change proposal command is a command for proposing a change in the print setting conditions to the user, and in the present embodiment, it is a command for proposing a change in the print redundancy to a high level. The setting change proposal command is output to the print setting screen 6A of the external device 6 via, for example, the input / output interface 130.

The external device 6 that has acquired the setting change proposal command displays, for example, as shown in FIG. 5B on the print setting screen 6A of the print setting conditions. FIG. 5B shows a display example such as "The print setting is a condition with low redundancy that is not suitable for a print image. Do you want to change it to a condition with high redundancy suitable for a print image?" ing.

By doing so, the user can easily grasp that the current print setting conditions are not suitable for the periodic image.

Then, when the redundancy setting is changed, the print setting change unit 170 changes the print setting condition to the condition according to the setting change. Specifically, when the user changes the condition to a high level of redundancy, the print setting change unit 170 acquires the change command via the input / output interface 130. After that, the print setting change unit 170 changes the print setting condition to a condition having a high redundancy level.

By doing so, the print setting condition is changed to the condition suitable for the periodic image, so that the print setting condition suitable for the periodic image can be set. As a result, it is possible to suppress image defects such as streaks, unevenness, and misalignment that occur when a periodic image is printed.

In addition, as a method of changing the redundancy of printing, a method of changing according to a printing method in an image forming apparatus such as a multipath method or an interleave method is applied.

Next, an operation example when executing the print setting change control in the image forming apparatus 1 will be described. First, an operation example when executing the print setting change control on the print setting screen will be described. FIG. 6 is a flowchart showing an example of an operation example when the print setting change control in the image forming apparatus 1 is executed. The process shown in FIG. 6 is appropriately executed when the print setting screen 6A is shown to the user on the external device 6.

As shown in FIG. 6, the image forming apparatus 1 detects the feature amount of the input image data (step S101). Next, the image forming apparatus 1 determines whether or not the image in the input image data includes a periodic image (step S102).

As a result of the determination, when the image does not include the periodic image (step S102, NO), this control ends. On the other hand, when the image includes a periodic image (step S102, YES), the image forming apparatus 1 outputs a command to display the periodic image in the image type portion on the print setting screen 6A to the external device 6 (step S103).

Next, the image forming apparatus 1 determines whether or not the print setting conditions are suitable for the periodic image (step S104). As a result of the determination, when the print setting condition is suitable for the periodic image (step S104, YES), this control ends.

On the other hand, when the print setting condition is not suitable for the periodic image (step S104, NO), the image forming apparatus 1 outputs a proposal command of the condition suitable for the periodic image to the external device 6 (step S105). After step S105, this control ends.

Next, an operation example when executing print setting control during the print process will be described. FIG. 7 is a flowchart showing an example of an operation example when the print setting change control in the image forming apparatus 1 is executed. The process shown in FIG. 7 is appropriately executed when the control unit 100 receives the print job execution command.

As shown in FIG. 7, the image forming apparatus 1 determines whether or not the image in the input image data includes a periodic image (step S201). As a result of the determination, when the image does not include the periodic image (step S201, NO), the process proceeds to step S207. On the other hand, when the image includes a periodic image (step S201, YES), the image forming apparatus 1 acquires the print setting condition (step S202).

After step S202, the image forming apparatus 1 determines whether or not the print setting conditions are suitable for the periodic image (step S203). As a result of the determination, when the print setting condition is suitable for the periodic image (step S203, YES), the process proceeds to step S207.

On the other hand, when the print setting condition is not suitable for the periodic image (step S203, NO), the image forming apparatus 1 outputs a command proposing a change to the condition suitable for the periodic image to the external device 6 (step S204). ..

Next, the image forming apparatus 1 determines whether or not the print setting conditions have been changed (step S205). As a result of the determination, if the print setting condition has not been changed (step S205, NO), the process proceeds to step S207.

On the other hand, when the print setting condition is changed (step S205, YES), the image forming apparatus 1 changes the print setting condition (step S206). Next, the image forming apparatus 1 executes a printing process (step S207). After step S207, this control ends.

According to the present embodiment configured as described above, the feature amount detection unit 140 detects the periodicity of the input image data as the feature amount, so that the print setting conditions suitable for the periodicity of the image of the input image data can be obtained. Can be changed. That is, in the present embodiment, it is possible to set the print setting conditions suitable for the image having periodicity.

Further, by using the spatial frequency component of the image, it is possible to relatively easily determine whether or not the input image data includes the periodic image.

Further, when the periodic image is included in the input image data and the print setting condition is not suitable for the periodic image, a proposal command for changing the setting to the print setting condition suitable for the periodic image is output. Therefore, the print setting condition Can quickly inform the user that is not suitable for periodic images.

In addition, when the print setting conditions are changed, the print process is performed after changing the print settings, so that image defects such as streaks, unevenness, and image misalignment that occur when printing periodic images occur. It can be suppressed from occurring.

Next, a second embodiment of the present invention will be described. In the first embodiment, the spatial frequency component for each color of the input image data is used as a feature quantity. In the second embodiment, the feature amount detection unit 140 detects the color information of the input image data in the horizontal direction (predetermined direction) as the feature amount.

For example, as shown in FIG. 8, it is assumed that the input image data is an image G2 in which a plurality of curves having periodicity are arranged side by side. The feature amount detection unit 140 detects the color information of the input image data in the horizontal direction as the feature amount.

For example, the color information in the horizontal direction at the predetermined position P1 in the vertical direction in the image G2 fluctuates as shown in FIG. FIG. 9 shows each color information in RGB. In FIG. 9, L1 indicates the R color, L2 indicates the G color, and L3 indicates the B color. The color information may be color information related to CMYK.

As described above, in the image G2 in which the color information periodically fluctuates within the range of the input image size, the feature amount detection unit 140 detects the color information in the horizontal direction at each position in the vertical direction.

The image type determination unit 150 determines whether or not the input image data includes the periodic image based on the periodic variation of the color information detected by the feature amount detection unit 140.

The image type determination unit 150 determines that the input image data includes the periodic image, for example, when the periodic fluctuations of the color information match at a plurality of positions in the vertical direction. The print setting acquisition unit 160 and the print setting change unit 170 perform the same processing as in the first embodiment.

Even with such a configuration, since the print setting conditions are changed to the conditions suitable for the periodic image, the print setting conditions suitable for the periodic image can be set. As a result, it is possible to suppress image defects such as streaks, unevenness, and image misalignment that occur when an image having periodicity is printed.

Further, in the second embodiment, the feature amount detecting unit 140 detects only the color information in the horizontal direction, but the present invention is not limited to this. For example, the feature amount detection unit 140 may detect only the color information in the vertical direction, may detect both the color information in the horizontal direction and the color information in the vertical direction, or detect the color information in the diagonal direction. You may.

Further, in the second embodiment, when the periodic fluctuations of the color information match at a plurality of positions in the vertical direction, it is determined that the input image data includes the periodic image, but the present invention is not limited to this. For example, it is determined that the input image data includes the periodic image based on other criteria such as whether the periodic fluctuations of the color information are similar at a plurality of positions and whether the frequencies in the periodic fluctuations match. You may.

By the way, in the relatively simple image G1 as shown in FIG. 3, the number of calculated spatial frequency components is relatively small. Therefore, in the image G1, the first embodiment is effective from the viewpoint of simplifying the feature amount detection. On the other hand, in the relatively complicated image G2 as shown in FIG. 8, the periodic variation of the color information of each position in a predetermined direction is detected without lack. Therefore, in the image G2, the second embodiment is effective from the viewpoint of improving the accuracy of feature quantity detection.

Therefore, the feature amount detection unit 140 may select either the spatial frequency component for each color or the periodic variation of the color information as the feature amount, depending on the image.

In the above embodiment, the proposal command for changing the setting to the print setting condition is output to the user, but the present invention is not limited to this, and the proposal command may not be output. In this case, the print setting change unit 170 may automatically change the print setting condition according to the determination result of the image type determination unit 150.

Further, in the above embodiment, the print setting acquisition unit 160 is provided, but the present invention is not limited to this, and the print setting change unit 170 of the image type determination unit 150 does not acquire the print setting conditions. The print setting conditions may be automatically changed according to the determination result.

Further, in the above embodiment, the feature amount detection unit 140, the image type determination unit 150, the print setting acquisition unit 160, and the print setting change unit 170 are separately provided, but the present invention is not limited to this. For example, a feature amount detection unit, an image type determination unit, a print setting acquisition unit, and a print setting change unit may be incorporated in the control unit.

Further, in the above embodiment, an inkjet type image forming apparatus is exemplified as the image forming apparatus, but the present invention is not limited thereto. For example, an image forming apparatus including a recording head having a plurality of recording elements, such as an LED (Light Emitting Diode) type image forming apparatus, may be used as the image forming apparatus of the present invention.

In addition, the above-described embodiments are merely examples of embodiment of the present invention, and the technical scope of the present invention should not be construed in a limited manner by these. That is, the present invention can be implemented in various forms without departing from its gist or its main features.

1 Image forming device 2 Belt transfer device 3 Recording head 6 External device 21 Drive roller 22 Driven roller 23 Transfer belt 100 Control unit 110 Recording head drive unit 120 Transfer drive unit 130 Input / output interface 140 Feature quantity detection unit 150 Image type determination unit 160 Print setting acquisition section 170 Print setting change section

Claims (12)

An image forming apparatus including a recording head having a plurality of recording elements.
A feature amount detection unit that detects the feature amount of input image data,
An image type determination unit that determines the type of input image data based on the feature amount detected by the feature amount detection unit, and an image type determination unit.
A print setting change unit that changes print setting conditions suitable for the determination result of the image type determination unit, and a print setting change unit.
With
The feature amount detection unit detects the periodicity of the input image data as the feature amount.
Image forming device. A print setting acquisition unit for acquiring the print setting condition of the input image data is provided.
The print setting change unit changes the print setting condition acquired by the print setting acquisition unit according to the determination result of the image type determination unit.
The image forming apparatus according to claim 1. The feature amount detection unit detects the spatial frequency component for each color of the input image data as the feature amount.
The image forming apparatus according to claim 1 or 2. The feature amount detection unit detects periodic fluctuations of color information in a predetermined direction of the input image data as the feature amount.
The image forming apparatus according to claim 1 or 2. The image type determination unit includes a periodic image in which the input image data has periodic repetitions based on a comparison result between the spatial frequency component detected by the feature amount detection unit and the size of the input image data. Judge whether or not
The image forming apparatus according to claim 3. The image type determination unit determines whether or not the input image data includes a periodic image having periodic repetitions based on the periodic fluctuation of the color information detected by the feature amount detection unit.
The image forming apparatus according to claim 4. A print setting acquisition unit for acquiring the print setting condition of the input image data is provided.
When the image type determination unit determines that the input image data includes the periodic image, the print setting acquisition unit acquires the print setting condition of the input image data, and the print setting condition is the same. Judging whether or not the print setting conditions are suitable for periodic images,
The image forming apparatus according to claim 5 or 6. When the input image data includes the periodic image and the print setting conditions acquired by the print setting acquisition unit are not suitable for the periodic image, the print setting changing unit prints suitable for the periodic image. Outputs a proposal command for changing settings to setting conditions,
The image forming apparatus according to claim 7. When the setting change is made, the print setting change unit changes the print setting condition to the condition corresponding to the setting change.
The image forming apparatus according to claim 8. The print setting change unit changes the redundancy setting in the print setting condition.
The image forming apparatus according to any one of claims 1 to 9. A method for changing print settings of an image forming apparatus including a recording head having a plurality of recording elements.
Detects the periodicity of the input image data as a feature quantity,
The type of the input image data is determined based on the detected feature amount, and
A print setting change method for changing print setting conditions suitable for a determination result of the type of input image data. A print setting change program for an image forming apparatus including a recording head having a plurality of recording elements.
On the computer
Feature detection processing that detects the periodicity of input image data as a feature,
Image type determination processing for determining the type of input image data based on the feature amount detected by the feature amount detection process, and
The print setting change process for changing the print setting conditions suitable for the judgment result of the image type judgment process, and the print setting change process.
Print setting change program to execute.

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