JP2021136482A - Aging deterioration correction device - Google Patents

Abstract

To provide an aging deterioration correction device capable of appropriately correcting the fading of a printed image while suppressing ink consumption.SOLUTION: An aging deterioration correction device includes an image data reception unit 30 that accepts image data to be printed, a time-dependent deterioration characteristic storage unit 35 that stores the time-related deterioration characteristics of the color of a printed image, an aging deterioration correction processing unit 33 that performs aging deterioration correction processing for compensating for the aging deterioration of the color of the printed image on the image data on the basis of the aging deterioration characteristics, and an aging correction processing area determination unit 32 that determines a region of a part of the entire image data to be subjected to the aging deterioration correction processing, and the aging deterioration correction processing unit 33 performs the aging deterioration correction processing only on a part of the entire image data.SELECTED DRAWING: Figure 2

Description

The present invention relates to a time-dependent deterioration correction device that performs a time-dependent deterioration correction process on image data to compensate for the time-dependent deterioration of the color of a printed image.

It is known that the color (density) of a printed matter varies depending on the combination of ink and paper, and fades with time. This is especially true for inks used in inkjet printing equipment.

Therefore, the color balance of the printed matter seen after a certain period of time may feel uncomfortable. For example, at a light printing shop, when printing in advance and delivering to the user at a later date, the color may be adjusted while looking at the image immediately after printing, and the color of the printed matter at the time of delivery may feel strange. ..
The reason is that the inks of each color of CMYK do not change with time, but the degree of fading varies.

In consideration of these, in order to maintain a stable color, it is sufficient to store the printed matter in an environment where the temperature and humidity are constant without exposing it to air, but general users have these environments. That is not realistic.

Therefore, for example, in Patent Document 1, a pattern capable of discriminating fading is multiplexed in the image data, the printed printed image is read, and the read image data is corrected based on the read information of the pattern. Has been proposed.

Further, in Patent Document 2, a color profile showing the correspondence between the color of the printed image and the image data after a lapse of a predetermined time from the time of printing is stored in advance, and the printed image is fair using the color profile. A method has been proposed.

Japanese Unexamined Patent Publication No. 2007-43423 Japanese Unexamined Patent Publication No. 2006-35673

However, when the image data is corrected or fair as in Patent Document 1 and Patent Document 2, correction may be performed even in a portion where fading is not particularly noticeable. In order to correct the fading, it is necessary to add the ink for that amount, but if the correction is applied to the portion where the fading is not noticeable as described above, the ink is wasted.

In view of the above circumstances, it is an object of the present invention to provide a time-dependent deterioration correction device capable of appropriately correcting fading of a printed image while suppressing ink consumption.

The aging deterioration correction device of the present invention is based on an image data receiving unit that receives image data to be printed, a aging characteristic storage unit that stores the aging characteristics of the color of the printed image, and image data based on the aging characteristics. On the other hand, the aging deterioration correction processing unit that performs the aging deterioration correction processing that compensates for the aging deterioration of the color of the printed image, and the aging deterioration correction processing area that determines a part of the entire image data to be subjected to the aging deterioration correction processing. A determination unit is provided, and the aging deterioration correction processing unit performs aging deterioration correction processing only on a part of a part of the entire image data.

According to the aging deterioration correction device of the present invention, based on the aging deterioration characteristics stored in advance, the image data is subjected to the aging deterioration correction processing for compensating for the aging deterioration of the color of the printed image, and of the entire image data. Since a part of the area to be subjected to the aging deterioration correction processing is determined and only a part of the area is subjected to the aging deterioration correction processing, the fading of the printed image is appropriate while suppressing the ink consumption. Can be corrected to.

A block diagram showing a configuration of an inkjet printing apparatus using an embodiment of the aging deterioration correction apparatus of the present invention. A block diagram showing a configuration of an image processing unit including an embodiment of the time-dependent deterioration correction device of the present invention. The figure which shows an example of the deterioration property with time Explanatory drawing for explaining aged deterioration correction processing Flow chart for explaining processing of an inkjet printing apparatus using one embodiment of the aging deterioration correction apparatus of the present invention. A color chart and a diagram showing an example of deterioration characteristics over time for each pixel. A block diagram showing a configuration of an image processing unit including another embodiment of the aging correction device of the present invention. Flow chart for explaining processing of an inkjet printing apparatus using another embodiment of the aging deterioration correction apparatus of the present invention.

Hereinafter, an inkjet printing apparatus using an embodiment of the aging deterioration correction apparatus of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram of the inkjet printing apparatus 1 of the present embodiment.

Based on the input image data, the inkjet printing apparatus 1 ejects ink onto a sheet-shaped printing medium such as paper or film to perform printing processing. As shown in FIG. 1, the inkjet printing apparatus 1 includes an image processing unit 21, a head drive control unit 22, an inkjet head unit 23, a transport unit 24, and a control unit 25.

The image processing unit 21 reads the image data output from the computer 2 or the document reading device (not shown), acquires the output image data, and performs various processing on the image data. The image processing unit 21 includes a CPU (Central Processing Unit), a semiconductor memory, and the like. The image processing unit 21 executes a program stored in advance in a storage medium such as a semiconductor memory or a hard disk, and operates an electric circuit to perform processing of each unit described later.

As shown in FIG. 2, the image processing unit 21 includes an image data receiving unit 30, a color conversion unit 31, a aging deterioration correction processing area determination unit 32, a aging deterioration correction processing unit 33, a halftone processing unit 34, and aging deterioration characteristic storage. The part 35 is provided. In the present embodiment, the image processing unit 21 corresponds to the time-dependent deterioration correction device of the present invention.

The image data receiving unit 30 receives the RGB format image data to be printed and outputs the image data to the color conversion unit 31.

The color conversion unit 31 converts the input RGB format image data into CMYK format image data. This color conversion is performed using a table in which the correspondence between the RGB values and the CMYK values is recorded in advance. The color conversion unit 31 outputs CMYK format image data to the time-dependent deterioration correction processing area determination unit 32.

The aging deterioration correction processing area determination unit 32 determines a part of the entire image data to be subjected to the aging deterioration correction processing, which will be described later, based on the input CMYK format image data. The time-dependent deterioration correction processing area determination unit 32 of the present embodiment identifies a solid area based on the image data of each color of C, M, Y, and K, and uses the solid area as a part of the time-dependent deterioration correction processing. decide. The solid area is a closed area printed in the same color. Such a solid region is a region that stands out when it deteriorates over time. Therefore, in the present embodiment, by performing the aging deterioration correction processing on the solid region, the aging deterioration can be made inconspicuous as the entire printed image. On the other hand, since the deterioration correction processing with time is applied only to a part of the image data, not the entire image data, the ink consumption can be reduced.

The aging deterioration correction processing unit 33 performs the aging deterioration correction processing on the image data based on the aging deterioration characteristics stored in the aging deterioration characteristic storage unit 35, which will be described later.

The aging deterioration correction processing is a processing for compensating for the aging deterioration of the color of the printed image described above. Specifically, the aging deterioration correction processing unit 33 of the present embodiment is set in the solid region of the image data of each color of C, M, Y, and K based on the aging deterioration identification stored in the aging deterioration characteristic storage unit 35. On the other hand, aging deterioration correction processing is performed.

The aging deterioration characteristic is obtained in advance by acquiring the aging deterioration of the color of the printed image. The aging deterioration characteristic storage unit 35 of the present embodiment stores the aging deterioration characteristics as shown in FIG. 3, for example. The aging deterioration characteristics shown in FIG. 3 indicate the aging deterioration for each color of C, M, Y and K, and the horizontal axis of FIG. 3 is time and the vertical axis is density (optical density). As shown in FIG. 3, the densities of the C, M, Y, and K colors tend to decrease with the passage of time.

Therefore, in the aging deterioration correction processing of the present embodiment, the input of a predetermined date such as the delivery date of the printed image is accepted, and the amount of decrease in density from the present time (immediately after printing) to that date is acquired as the aging deterioration amount. .. Then, additional data is obtained for each color so that the solid area of the printed image of each color becomes darker by the amount of decrease in the density, and as shown in FIG. 4, the added data is added to the image data of each color. Deterioration correction processing over time is performed by generating density-added image data for each color. It is assumed that the relationship between the amount of decrease in concentration and the added data is set in advance. By performing the printing process using the density-added image data of each color, it is possible to generate a time-deterioration-corrected image that compensates for the fading due to the time-deterioration.

Returning to FIG. 2, the halftone processing unit 34 performs halftone processing on the density-added image data of each color of C, M, Y, and K that has been subjected to the deterioration correction processing with time, and generates drop data of each color. do. As the halftone processing, error diffusion processing and dither mask processing are used. The above is the description of the image processing unit 21.

Next, returning to FIG. 1, the head drive control unit 22 drives the inkjet head unit 23 based on the drop data of each color generated by the halftone processing unit 34 to eject ink from each nozzle of the inkjet head of each color. Discharge.

The inkjet head unit 23 includes a plurality of inkjet heads that eject inks of each color of C, M, Y, and K. As described above, each inkjet head is controlled by the head drive control unit 22 based on the drop data of each color to eject ink to the print medium and form a print image on the print medium.

The transport unit 24 includes a transport mechanism that transports the print medium to the inkjet head unit 23.

The control unit 25 includes a CPU (Central Processing Unit), a semiconductor memory, and the like, and controls the entire inkjet printing device 1. The control unit 25 controls the operation of each unit of the inkjet printing device 1 by executing a control program stored in advance in a storage medium such as a semiconductor memory or a hard disk and operating an electric circuit.

Next, the processing of the inkjet printing apparatus 1 of the present embodiment will be described with reference to the flowchart shown in FIG.

First, the image data output from the computer 2 or the document reading device is received by the image data receiving unit 30 (S10).

The image data received by the image data receiving unit 30 is converted from the image data in RGB format into the image data of each color in CMYK format by the color conversion unit 31 (S12).

Then, the image data of each color is input to the aging deterioration correction processing area determination unit 32, and the aging deterioration correction processing area determination unit 32 identifies the solid area included in the input image data to determine the aging deterioration correction processing area. Is determined (S14).

On the other hand, date information such as the delivery date of the printed image is set and input by the user on the operation panel (not shown) of the computer 2 or the inkjet printing device 1 connected to the inkjet printing device 1 (S16), and the date is set. The information is input to the aging deterioration correction processing unit 33.

The aging deterioration correction processing unit 33 refers to the aging deterioration characteristics of each color of C, M, Y, and K stored in the aging deterioration characteristic storage unit 35 based on the input date information, and reduces the density of each color. Obtain the quantity (S18).

Then, the aging deterioration correction processing unit 33 determines the image data of each color of CMYK, the aging deterioration correction processing region determined by the aging deterioration correction processing area determination unit 32, and the density of each color obtained from the aging deterioration characteristics of each color. Based on the amount of reduction, the image data of each color is subjected to aged deterioration correction processing (S20).

Then, the density-added image data of each color that has undergone the deterioration correction processing over time is output to the halftone processing unit 34, and the halftone processing unit 34 performs halftone processing on the input density-added image data of each color. The drop data of each color is generated (S22), and the drop data of each color is output to the head drive control unit 22.

The head drive control unit 22 drives the inkjet head unit 23 based on the input drop data of each color, and print processing is performed on the print medium conveyed by the transfer unit 24 (S24).

In the above embodiment, the time-dependent deterioration characteristic storage unit 35 stores the time-dependent deterioration characteristics for each color of C, M, Y, and K, and as shown in FIG. 4, each color of C, M, Y, and K is stored. The image data is subjected to the aging deterioration correction processing based on the aging deterioration characteristics of each color, that is, the aging deterioration correction processing is performed in units of C, M, Y and K image data. Not limited to this, aging deterioration correction processing may be performed for each pixel constituting the original image data (image data received by the image data receiving unit 30). Hereinafter, a method of performing the aging deterioration correction processing on a pixel-by-pixel basis will be described in detail.

First, a color chart consisting of patches of a large number of colors constituting the color space is created. FIG. 6 is a diagram showing an example of the above-mentioned color chart. Each cell shown in FIG. 6 corresponds to a patch, and a different color is arranged for each patch. By measuring the change over time in the concentrations of the C component, M component, Y component and K component of each color in this color chart, as shown in FIG. 6, the time-dependent deterioration characteristics of C, M, Y and K for each color Is acquired and stored in the time-dependent deterioration characteristic storage unit 35.

Then, when performing the aging deterioration correction processing on the image data, the aging deterioration correction processing unit 33 determines the color of the solid region included in the image data, and C, M, Y corresponding to the determined color. The time-dependent deterioration characteristics of and K are read out from the time-dependent deterioration characteristic storage unit 35.

Then, the aging deterioration correction processing unit 33 performs the aging deterioration correction processing for each pixel included in the solid region by using the aging deterioration characteristic. That is, additional pixel data corresponding to the amount of decrease in density is added to the pixel data of C, M, Y, and K of each pixel.

Further, in the above embodiment, the solid area included in the image data is specified, and the deterioration correction processing with time is performed only on the solid area. However, for example, when the solid area is narrow, the entire printed image is displayed. Looking at it, deterioration over time may not be noticeable.

Therefore, the aging deterioration correction processing area determination unit 32 determines only the solid area having an area equal to or larger than the preset threshold value as the aging deterioration correction processing area, and the aging of the solid area having an area less than the threshold value. Deterioration correction processing may not be performed. As a result, it is possible to perform the aging deterioration correction treatment only on the region where the aging deterioration is conspicuous, and it is possible to further suppress the consumption of ink.

Further, in the above embodiment, the aging deterioration correction processing area determination unit 32 determines the solid area as the aging deterioration correction processing area, but the present invention is not limited to this. For example, even when the printed image contains a gradation area, deterioration over time may be noticeable. The gradation area is an area in which at least one of hue, saturation, and lightness changes continuously.

Therefore, for example, a gradation region included in the image data may be specified, and the specified gradation region may be determined as an aged deterioration correction processing region. As a method of specifying the gradation area, for example, the area of the object in which the gradation is specified as an attribute may be specified as the gradation area, and when the image data is the read data, the actual hue may be specified. , Saturation and lightness may be calculated to identify areas where at least one of them is continuous.

Further, when the gradation area is used as the aging deterioration correction processing area, it may be determined whether or not the gradation area is used as the aging deterioration correction processing area according to the area as in the solid area. That is, the aging deterioration correction processing area determination unit 32 determines only the gradation area having an area equal to or larger than the preset threshold value as the aging deterioration correction processing area, and the aging of the gradation area having an area less than the threshold value. Deterioration correction processing may not be performed. However, since the deterioration over time is more noticeable in the solid area where the solid area and the gradation area are compared, when deciding whether or not to use the deterioration correction processing area with time based on the area of the area as described above, the solid area is solid. The relationship between the threshold Tb of the area of the region and the threshold Tg of the area of the gradation region is preferably Tb <Tg.

Further, the aging deterioration correction processing region is not limited to the above-mentioned solid region and gradation region, and for example, a preset color region may be determined as the aging deterioration correction region. For example, when a printed image contains a human face, it is often observed mainly on the human face, so that it is very noticeable if the face portion deteriorates over time. Therefore, for example, it is preferable to specify the skin color region from the image data and determine it as the aging deterioration correction processing region. As a method of specifying the skin color region, for example, RGB image data or C, M, Y and K image data is ^{converted into L *} a ^* b ^* data, and the L ^* value, a ^* value and b ^* value are obtained. , The area within the preset range may be specified as the skin color area. By using the L ^* value, the a ^* value, and the b ^* value in this way to determine the preset color region as the aging correction region, the fading of the printed image can be made inconspicuous.

Further, not only the skin color but also the bluish color which is the sky color and the greenish color which is the wood color are human memory colors, so that it is conspicuous that there is deterioration over time in these color regions. Therefore, it is preferable to specify such a bluish color region and a greenish color region and determine them as the aged deterioration correction processing region. As a method for identifying these regions, as in the case of skin color, the L ^* value, the a ^* value, and the b ^* value may be used for identification.

Further, in the above description, an example in which the aging deterioration correction processing area determination unit 32 automatically determines the aging deterioration correction processing area 32 has been described, but the present invention is not limited to this, and the aging deterioration correction processing area determination unit 32 is designated by the user. The area may be determined as the aged deterioration correction processing area. In this way, by allowing the user to specify the aging deterioration correction processing area, it is possible to determine a more appropriate aging deterioration correction processing area according to the actual aging deterioration. Hereinafter, a case where the user sets and inputs the aged deterioration correction processing area will be described in detail.

FIG. 7 is a block diagram showing the configuration of the image processing unit 21 in this case. The image processing unit 21 shown in FIG. 7 includes a time-dependent deterioration image generation unit 36 and a time-deterioration correction processing area reception unit 37.

The aged deterioration image generation unit 36 generates an aged deterioration image representing a printed image after the aged deterioration based on the image data received by the image data receiving unit 30 and the aged deterioration characteristic stored in the aged deterioration characteristic storage unit 35. Generate.

FIG. 9 is a flowchart for explaining the processing of the inkjet printing apparatus 1 when the user designates the deterioration correction processing area with time.

First, as in the first embodiment, the image data output from the computer or the document reading device is received by the image data receiving unit 30 (S30).

The image data received by the image data receiving unit 30 is converted from the RGB format image data into the image data of each color in the CMYK format by the color conversion unit 31 and output to the aged deterioration image generation unit 36 (S32).

On the other hand, date information such as the delivery date of the printed image is set and input by the user on the operation panel (not shown) of the computer 2 or the inkjet printing device 1 connected to the inkjet printing device 1 (S34), and the date is set. The information is output to the time-dependent deterioration image generation unit 36.

Then, the aging deterioration image generation unit 36 is based on the input image data of each color in the CMYK format, the aging deterioration characteristics stored in the aging deterioration characteristic storage unit 35, and the input date information. Aged deterioration image data representing a later printed image is generated (S36). Specifically, the aging deterioration image generation unit 36 obtains subtraction data corresponding to the amount of decrease in the density of each color on that date based on the input date information and the aging deterioration characteristics of each color, and C and M thereof. , Y, and K, the time-deteriorated image data is generated by subtracting the subtraction data of each color from the image data of each color.

Then, the time-deteriorated image data generated by the time-deteriorated image generation unit 36 is converted into RGB format image data by the RGB conversion unit 38, and then connected to the inkjet printing device 1 by the control unit 25 shown in FIG. The image is output to the computer 2 and the aged deterioration image is displayed on the monitor of the computer 2 (S38).

Then, the user observes the aged deterioration image displayed on the monitor, and designates a part of the area where the aged deterioration is conspicuous by using a keyboard or a mouse (S40).

Information on a part of the area designated by the user is output from the computer 2 to the inkjet printing device 1 and received by the time-dependent deterioration correction processing area receiving unit 37. Information on a part of the area received by the aged deterioration correction processing area receiving unit 37 is input to the aged deterioration correction processing area determination unit 32, and the aged deterioration correction processing area determination unit 32 inputs a part of the input area. It is determined as the aged deterioration correction processing region (S42).

Then, the image data of each color of C, M, Y, and K generated in S32, the date information set and input in S34, and the information of the time-dependent deterioration correction region determined in S42 are combined with the time-dependent deterioration correction processing unit. It is input to 33.

The aging deterioration correction processing unit 33 refers to the aging deterioration characteristics of each color of C, M, Y, and K stored in the aging deterioration characteristic storage unit 35 based on the input date information, and reduces the density of each color. Obtain the quantity (S44).

Then, the aging deterioration correction processing unit 33 is based on the input image data of each color of CMYK, the input aging deterioration correction processing area, and the amount of decrease in the density of each color obtained from the aging deterioration characteristics of each color. , The image data of each color is subjected to the deterioration correction processing with time (S46).

Then, the density-added image data of each color that has undergone the deterioration correction processing over time is output to the halftone processing unit 34, and the halftone processing unit 34 performs halftone processing on the input density-added image data of each color. The drop data of each color is generated (S48), and the drop data of each color is output to the head drive control unit 22.

The head drive control unit 22 drives the inkjet head unit 23 based on the input drop data of each color, and print processing is performed on the print medium conveyed by the transfer unit 24 (S50).

When the aging deterioration image is displayed in S38, if no noticeable aging deterioration is observed, the user may set and input that the aging deterioration correction processing is not performed.

Further, even when the user does not specify the aged deterioration correction processing area and automatically determines the aged deterioration correction processing area, the above-mentioned aged deterioration image may be displayed, and the user may display the aged deterioration correction processing area. You may specify whether or not to perform the deterioration correction processing.

Further, in the above description, the time-degraded image is displayed on the monitor of the computer 2, but the present invention is not limited to this, and the time-degraded image may be printed by the inkjet printing apparatus 1. Then, the user may specify the time-dependent deterioration correction processing area or specify the presence / absence of the time-dependent deterioration correction processing by looking at the printed time-dependent deterioration image.

Further, in the above description, an example of applying the aging deterioration correction processing to the solid area, the gradation area, the preset color area, or the area specified by the user has been described, but the solid area, the gradation area, and the preset area are set in advance. The user may be able to select which area of the colored area or the area designated by the user to perform the deterioration correction processing with time.

In addition, the user may be able to select whether to perform the aging deterioration correction processing in units of image data of each color of C, M, Y, and K, or to perform aging deterioration correction processing in pixel units.

Further, in the above embodiment, the time-dependent deterioration characteristics of each color of CMYK are stored in the time-dependent deterioration characteristic storage unit 35, but the time-dependent deterioration characteristics of CMYK are further stored for each type of print medium. You may. As a result, it is possible to cope with the difference in the fading method due to the difference in the type of the print medium, and it is possible to correct the fading more appropriately.

Further, in the above embodiment, the case where the ink has four colors of CMYK has been described, but the ink is not necessarily limited to these four colors, other colors may be used, and further colors may be added. Examples of the color to be added include Red and Gray.

Further, the above embodiment is an example in which the time-dependent deterioration correction device of the present invention is applied to an inkjet printing device, but the present invention can be applied not only to an inkjet printing device but also to other printing devices. It is also applicable to, for example, a laser printing device that performs a printing process using toner and a stencil printing device that performs a printing process using a stencil.

The following additional notes are further disclosed with respect to the time-dependent deterioration correction device of the present invention.
(Additional note)

In the aging deterioration correction device of the present invention, the aging deterioration image generation unit that generates the aging deterioration image representing the printed image after aging deterioration based on the aging deterioration characteristics and the image data, and a part of the area on the aging deterioration image. A time-dependent deterioration correction processing area reception unit that accepts the input of It can be determined as a part of the area to be subjected to the aged deterioration correction processing.

Further, in the time-dependent deterioration correction device of the present invention, the time-dependent deterioration correction processing region determination unit can determine a solid region or a gradation region included in the image data as a part region to be subjected to the time-dependent deterioration correction processing.

Further, in the aging deterioration correction device of the present invention, the aging deterioration correction processing area determination unit determines whether or not to make a part of the aging deterioration correction processing to be performed based on the area of the solid region or the gradation region. be able to.

Further, in the time-dependent deterioration correction device of the present invention, the time-dependent deterioration correction processing area determination unit determines a part of the time-dependent deterioration correction processing based on at least one of the hue, saturation, and brightness of the image data. can do.

1 Inkjet printing device 2 Computer 21 Image processing unit 22 Head drive control unit 23 Inkjet head unit 24 Transport unit 25 Control unit 30 Image data reception unit 31 Color conversion unit 32 Time-related deterioration correction processing area determination unit 33 Time-related deterioration correction processing unit 34 Half Tone processing unit 35 Aged deterioration characteristic storage unit 36 Aged deterioration image generation unit 37 Aged deterioration correction processing area reception unit 38 RGB conversion unit

Claims (5)

An image data reception unit that accepts image data to be printed and
A time-deterioration characteristic storage unit that stores the time-deterioration characteristics of the color of the printed image,
Based on the aging deterioration characteristics, the aging deterioration correction processing unit that performs the aging deterioration correction processing for compensating for the aging deterioration of the color of the printed image on the image data, and the aging deterioration correction processing unit.
A time-dependent deterioration correction processing area determination unit for determining a part of the entire image data to be subjected to the time-dependent deterioration correction processing is provided.
An aging deterioration correction device in which the aging deterioration correction processing unit performs the aging deterioration correction processing only on a part of the entire image data. A time-degraded image generation unit that generates a time-deteriorated image representing a printed image after time-deterioration based on the time-deterioration characteristics and the image data.
It is provided with a time-deterioration correction processing area receiving unit that receives input of a part of the time-deteriorated image.
A claim in which the time-dependent deterioration correction processing area determination unit determines a part of the time-dependent deterioration image received by the time-related deterioration correction processing area reception unit as a part of the time-dependent deterioration correction processing. 1. The time-dependent deterioration correction device according to 1. The time-dependent deterioration correction device according to claim 1 or 2, wherein the time-dependent deterioration correction processing area determination unit determines a solid area or a gradation area included in the image data as a part of the area to be subjected to the time-dependent deterioration correction processing. The time-dependent deterioration correction device according to claim 3, wherein the time-dependent deterioration correction processing area determination unit determines whether or not to make a part of the time-related deterioration correction processing to be performed based on the area of the solid area or the gradation area. .. Any one of claims 1 to 4 in which the time-dependent deterioration correction processing region determination unit determines a part of the time-dependent deterioration correction processing region based on at least one of the hue, saturation, and brightness of the image data. The time-dependent deterioration correction device described in the item.

Images