JP6702789B2 - Image processing device, image processing method, and program - Google Patents

Description

The present invention relates to an image processing technique for controlling the gloss characteristic of recorded matter.

In addition to conventional color reproduction, there is a demand for a printing technique that reproduces arbitrary gloss on a recording medium. Japanese Unexamined Patent Application Publication No. 2004-242242 discloses a printing technique that controls gloss according to an object included in an image.

JP, 2002-331708, A

However, in the technique described in Patent Document 1, there is a possibility that a sense of depth different from the actual positional relationship of the object may appear on the recorded matter due to the gloss difference on the recorded matter, and this is not taken into consideration. For example, if there is a large difference in glossiness between a low-glossiness portion and a high-glossiness portion, a perceptual effect such as a low-glossiness portion appearing to be raised occurs. When the gloss control described in Patent Document 1 is performed without considering such an effect, the sense of depth corresponding to the actual positional relationship of the object is disturbed. A specific example will be described with reference to FIG. FIG. 1A shows a plane image in which the depth is perceived when observed. Furthermore, the positional relationship in the depth direction that is perceived when observing the plane image shown in FIG. 1A is schematically represented in FIG. Even if the original position of the object 11 is d1 as shown in FIG. 1B, the object 11 is in the same position as the objects 12 to 13 when the difference in gloss between the objects 11 to 13 and the background 14 is large, for example. It rises up to d2 and is perceived. At this time, if the planar image is in focus at the position of d2, the object 11 that is out of focus has an effect of giving a sense of discomfort to the original sense of depth of the entire image.

It is an object of the present invention to provide image processing that suppresses an unfocused region from appearing side by side with a focused region in the depth direction.

In order to solve the above problems, the image processing apparatus according to the present invention acquires, for each pixel of an image, first position information that specifies a position in the depth direction of the image and gloss information that indicates the gloss of the image. a first obtaining means, second acquisition means for acquiring second position information for specifying a target position in the depth direction of the image, on the basis of the second position information and the first positional information, and the target position Includes a correction unit that corrects the gloss information so as to reduce the gloss difference in the areas corresponding to different positions.

According to the present invention, it is possible to prevent the unfocused area from appearing side by side with the focused area in the depth direction.

Schematic diagram for explaining the sense of depth when looking at a printed matter with gloss control Block diagram showing the hardware configuration of the image processing apparatus 1 in the embodiment Block diagram showing a functional configuration of the image processing apparatus 1 in the embodiment Flowchart showing the processing contents of the image processing apparatus 1 in the embodiment The figure which shows the example of the UI screen in an Example FIG. 3 is a diagram showing an example of the configuration of a table referred to in Example 1. FIG. 2 is a diagram showing the configuration of the printer 23 in the embodiment. FIG. 10 is a diagram showing a configuration example of a table referred to in a second embodiment.

Embodiments for carrying out the present invention will be described with reference to the drawings. However, the constituent elements described in this embodiment are merely examples, and are not intended to limit the scope of the present invention thereto.

[Example 1]
Hereinafter, an embodiment will be described in which position information indicating a relative positional relationship between objects in the image in the depth direction of the image and gloss information of the image are acquired, and the gloss information is corrected based on the position information.

FIG. 2 shows a hardware configuration example of the image processing apparatus 1 according to this embodiment. The CPU 201 uses the RAM 203 as a work memory and executes an OS (operating system) and various programs stored in the ROM 202, the HDD (hard disk drive) 26, and the like. The CPU 201 also controls each component via the system bus 207. Note that the processing according to the flowcharts described later is executed by the CPU 201 by expanding the program code stored in the ROM 202, the HDD 26, or the like into the RAM 203. A general-purpose I/F (interface) 204 such as a USB is connected to an input device 22 such as a mouse and a keyboard, a printer 23, and the like via a serial bus 21. The SATA (serial ATA) I/F 205 is a serial bus interface, and is connected to the HDD 26 and a general-purpose drive 27 that reads and writes various recording media via the serial bus 25. The CPU 201 uses various recording media mounted on the HDD 26 or the general-purpose drive 27 as a storage location for various data. A VC (video card) 206 is a video interface and is connected to the display 24. The CPU 201 displays a UI (user interface) screen provided by the program on the display 24 and receives an input such as a user instruction received via the input device 22.

FIG. 3 is a block diagram showing the functional arrangement of the image processing apparatus 1 according to this embodiment. The contents of processing executed by the image processing application included in the above-described various programs based on a command from the CPU 201 will be described with reference to FIG.

The image processing apparatus 1 has a configuration that realizes a function of an image processing application, a display control unit 301, an acquisition unit 302, a correction unit 303, a first determination unit 304, a second determination unit 305, and a formation control unit. It has 306 and a storage unit 307. The display control unit 301 gives an instruction to the external display 24 to cause the display 24 to display a UI screen or the like that receives an input from the user. The display control unit 301 as described above functions as an input reception unit that receives an instruction input of a user that specifies image data including color information, gloss information, and position information. Details of the image data including each information will be described later. The acquisition unit 302 acquires the image data that has been input. The correction unit 303 corrects the gloss information of the input image data. The first determination unit 304 determines the recording amount of the gloss control ink based on the corrected gloss information. The second determination unit 305 determines the recording amount of the color control ink based on the color information. The formation control unit 306 instructs the external printer 24 to form an image on the recording medium based on the ink recording amount determined by the first determination unit 304 and the second determination unit 305. The storage unit 307 holds in advance information such as a table that can refer to the ink recording amount.

4A to 4D are flowcharts showing the processing contents of the image processing apparatus 1 in this embodiment. Hereinafter, the details of the processing content of the image processing apparatus 1 in this embodiment will be described with reference to FIG. In the process according to the flowchart shown in FIG. 4, the program code stored in the ROM 202 is expanded in the RAM 203 and executed by the CPU 201. The process according to the flowchart shown in FIG. 4 is started when the user operates the input device 22 to input an instruction and the CPU 201 receives the input instruction. Hereinafter, each step (process) is represented by adding S before the symbol.

In S<b>10, the display control unit 301 causes the display 24 to display a UI screen that prompts the user to input the necessary information so that the image processing apparatus 1 receives the input of the necessary information. FIG. 5 shows an example of a UI screen 500 that prompts the user for input in this embodiment. The input area 501 is an area for receiving the input of the path and file name of the image data file recorded in advance in the storage device such as the HDD 26. In this embodiment, the image data of the file name input here is captured image data in which color information, gloss information, and position information are recorded in different channels. Specifically, the color information has three values of RGB, the gloss information has specular gloss, the position information has distance, and these five types of data are stored in five channels. In addition, it is assumed that the focus distance at the time of image capturing is recorded in the header of the image data. The focusing distance is the distance from the imaging surface of the camera to the subject. In addition, the gloss information and the position information are acquired by capturing an image of a subject with a plurality of cameras. Specifically, the position information is calculated by the triangulation principle from the positions of corresponding points on each image (a pair of points at the same location on the subject) and the known relative positional relationship of a plurality of cameras. Get by stereo method. The gloss information is acquired by selecting the maximum pixel value (specular reflection component) from the pixel values of corresponding points on each image. By storing the gloss information and the position information in another channel of a 3-channel captured image (RGB image) used as color information, it is possible to generate the 5-channel image data described above. Returning to FIG. 5 again, the output button 502 is an area for receiving an instruction to start the print processing on the recording medium. The end button 503 is an area for receiving an instruction to end the series of processes shown in FIG. When an instruction result from the user by operating the input area 501 or the output button 502 is accepted, the process proceeds to S20.

In S20, the acquisition unit 302 reads the image data corresponding to the instruction accepted in S10, and acquires the RGB value, the specular glossiness, and the distance in each pixel described above, and further the focusing distance at the time of imaging. In S30, the correction unit 303 corrects the specular glossiness based on the specular glossiness and the distance acquired in S20 and the focusing distance at the time of image capturing. The process of correcting the specular gloss will be described later. The specular glossiness corrected by the processing is stored as the pixel value of the channel corresponding to the specular glossiness in the above-mentioned image data of five channels. The process is executed for all pixels.

In S40, the first determination unit 304 determines the recording amount of the gloss control ink according to the specular glossiness corrected in S30. In this embodiment, an achromatic clear (CL) ink having a small absorption coefficient and scattering coefficient is used as a gloss control ink, and the recording amount of the CL ink is determined. The specular glossiness is controlled by applying a recording amount of CL ink to the outermost surface of the image under a predetermined condition such as a dot pattern and the number of passes based on the recording amount of the ink and changing the surface roughness. The gloss control method is not limited to this, and other known gloss control methods may be used, for example, the CL ink recording amount is fixed and control is performed only based on the density of dot patterns. A method of determining the CL ink recording amount based on the glossiness will be described later. The process is executed for all pixels. In S50, the second determination unit 305 determines the recording amount of the color control ink to be applied on the recording medium based on the RGB values acquired in S20. In this embodiment, CMYK inks of four colors of cyan (C), magenta (M), yellow (Y), and black (K) are used as color control inks, and the recording amount of the inks is determined. A method of determining the recording amount of CMYK ink based on RGB values will be described later. The process is executed for all pixels. In S60, the formation control unit 306 forms an image based on the ink recording amount determined in S40 and S50. The process of forming an image will be described later.

Details of the process (S30) of correcting the gloss information of the image will be described with reference to FIG. In the process of S30, the correction unit 303 corrects the specular glossiness indicated by the gloss information.

In S31, the correction unit 303 acquires a difference value between the distance recorded in each pixel described above and the focus distance at the time of image capturing. In S32, the correction unit 303 refers to the gloss correction table stored in the storage unit 307. FIG. 6A shows an example of the gloss correction table. In the present embodiment, the gloss correction table associates the difference value acquired in S31 with the gloss correction coefficient. In the gloss correction table shown in FIG. 6A, the smaller the difference value, the larger the gloss correction coefficient, and the larger the difference value, the smaller the gloss correction coefficient. When the difference value does not exist in the table, the correction coefficient corresponding to the difference value is calculated by known linear interpolation.

In S33, the correction unit 303 acquires a reference value of the specular glossiness (hereinafter referred to as a gloss reference value) recorded in the storage unit 307 in advance, and uses the gloss reference value and the correction coefficient acquired in S32. The specular glossiness acquired in S20 is corrected. When the specular glossiness obtained in S20 is G _IN , the correction coefficient obtained in S32 is k, the gloss reference value is G0, and the corrected specular glossiness is G _OUT , the specular glossiness is given by the following (formula 1). Can be corrected by

G _OUT =(G _IN −G0)×k+G0 (Equation 1)
According to (Equation 1), the glossiness approaches the gloss reference value as the difference value increases. Therefore, the difference in glossiness between the non-focused area and the neighboring area is reduced, and the gloss reproduction is performed faithfully to the input gloss information in the focused area. The gloss reference value G0 recorded in the storage unit 307 can be set to, for example, the lowest value in the specular gloss reproduction range. The corrected specular gloss G _OUT is stored as the pixel value of the channel corresponding to the specular gloss in the image data of 5 channels, as described above. Hereinafter, the 5-channel image data after the gloss correction is also referred to as corrected gloss data.

Details of the process (S40) for determining the recording amount of the gloss control ink, that is, the CL ink will be described with reference to FIG.

In S41, the first determination unit 304 refers to the table stored in the storage unit 307. FIG. 6B shows an example of the table. In the present embodiment, as shown in FIG. 6B, a table in which the specular glossiness and the CL ink recording amount directly correspond to each other is used, but a function for deriving the CL ink recording amount with the glossiness as an argument is used. It may be. In S42, the first determination unit 304 refers to the table, acquires the recording amount of CL ink corresponding to the specular glossiness indicated by the corrected gloss data in S30, and stores the recording amount of CL ink in each pixel. Generate glossy image data. In the present embodiment, when the specular glossiness that matches the specular glossiness value corrected in S30 does not exist in the table, the CL ink recording amount corresponding to the glossiness is calculated by known linear interpolation.

Details of the process (S50) for determining the recording amount of the color control ink, that is, the CMYK ink, will be described with reference to FIG.

In S51, the second determination unit 305 refers to the table stored in the storage unit 307. FIG. 6C shows an example of the table. In this embodiment, since the color information is given as RGB values as described above, a table in which RGB and CMYK ink recording amount values are associated is used. Specifically, a table holding the CMYK values of 729 colors in which RGB values are divided into 9 and combined is referred to. In S52, the second determination unit 305 refers to the table, acquires the recording amount of CMYK ink corresponding to the RGB values acquired in S20 by a known interpolation calculation, and stores the CMYK values in each pixel. Generate data. In the processes S51 to S52 of the second determination unit 305, the ink recording amount is directly derived from RGB. The CMYK values may be derived from

Next, details of the process (S60) for forming an image based on the glossy image data and the color image data which store the ink recording amount determined in S40 and S50 will be described.

The formation control unit 306 performs known halftone processing and pass decomposition processing based on the color image data and the gloss image data, determines print dot positions for each print scan, and generates image formation data. Further, the external printer 24 is caused to execute an image forming operation based on the image forming data. Hereinafter, the configuration of the printer 24 and the image forming operation will be described in detail with reference to FIG. 7.

FIG. 7 is a diagram showing the configuration of the printer 24. The head cartridge 701 is provided with a recording head including a plurality of ejection ports, an ink tank that supplies ink to the recording head, and a connector for receiving a signal that drives each ejection port of the recording head. The head cartridge 701 is replaceably mounted on the carriage 702 at a predetermined position. The carriage 702 is provided with a connector holder for transmitting a drive signal and the like to the head cartridge 701 via a connector. The carriage 702 is configured to be capable of reciprocating along the guide shaft 703. Specifically, the carriage 702 is driven by a main scanning motor 704 as a drive source via a drive mechanism such as a motor pulley 705, a driven pulley 706, a timing belt 707, and the position and movement thereof are controlled. The movement of the carriage 702 along the guide shaft 703 is called "main scanning", and the movement direction is called "main scanning direction". A recording medium 708 for printing is placed on an ASF (auto sheet feeder) 710. When forming an image on the recording medium 708, the pickup roller 712 rotates in accordance with the driving of the sheet feeding motor 711, and the recording medium 708 is separated from the ASF 710 one by one and is fed. Further, the recording medium 708 is conveyed to the recording start position facing the ejection opening surface of the head cartridge 701 on the carriage 702 by the rotation of the conveying roller 709. The transport roller 709 is driven via a gear using the line feed motor 713 as a drive source. The determination as to whether the recording medium 708 has been supplied and the determination of the sheet feeding position are performed when the recording medium 708 passes the end sensor 714. The head cartridge 701 mounted on the carriage 702 is held so that the ejection port surface projects downward from the carriage 702 and is parallel to the recording medium 708. The control unit 720 controls the operation of the configuration of the printer 24 based on the derived ink value.

Next, the image forming operation of the printer 24 will be described. When the recording medium 708 is conveyed to the recording start position, the carriage 702 moves on the recording medium 708 along the guide shaft 703, and at the time of the movement, ink is ejected from the ejection port of the recording head. When the carriage 702 moves to one end of the guide shaft 703, the conveyance roller 709 conveys the recording medium 708 by a predetermined amount in a direction perpendicular to the scanning direction of the carriage 702. The conveyance of the recording medium 708 is called "paper feed" or "sub-scanning", and the conveyance direction is called "paper feed direction" or "sub-scanning direction". When the recording medium 708 has been conveyed by a predetermined amount in the sub-scanning direction, the carriage 702 moves along the guide shaft 703 again. In this way, the scanning by the carriage 702 of the recording head and the paper feeding are repeated. As a result, the color image indicated by the color image data is formed by the CMYK inks on the entire recording medium 708, and the gloss image indicated by the gloss image data is formed by the CL inks on the color image. The recording medium used in this embodiment may be other than the recording paper as long as it can support the image formation by the recording head. Further, in this embodiment, the example of the printer 24 adopting the ink jet method is shown, but other recording methods such as an electrophotographic method may be used.

As described above, the position information indicating the relative positional relationship between objects in the image in the depth direction of the image and the gloss information of the image are acquired, and the gloss information is corrected based on the position information. As a result, it is possible to suppress the original obstruction of the depth feeling due to the gloss of the non-focused area, and to print with desired glossiness and depth feeling of the focused area.

[Example 2]
In the first embodiment, the form of performing the correction process of bringing the glossiness input according to the position information closer to a predetermined gloss reference value has been described. In the present embodiment, a mode will be described in which a gloss reference value is not provided and the glossiness input according to the position information is smoothed in the vicinity area. As a result, it is possible to reduce the difference in gloss in the area in the vicinity of the area that is not focused. The hardware configuration and functional configuration of the image processing apparatus 1 in this embodiment are the same as those in the first embodiment. In this embodiment, the glossiness correction process (S30) by the correction unit 303 is different from that of the first embodiment. Therefore, the content of the process will be mainly described below.

Details of the process (S30) for correcting the gloss information of the image in the present embodiment will be described with reference to FIG. In the process of S30, the correction unit 303 corrects the specular glossiness indicating the gloss information.

In S31, the correction unit 303 acquires the difference value between the distance recorded in each pixel described above and the focus distance at the time of image capturing, as in the first embodiment. In S32, the correction unit 303 refers to the gloss correction table stored in the storage unit 307. FIG. 8 shows an example of the gloss correction table. In the gloss correction table shown in FIG. 8, the parameter related to the smoothing process is associated with the difference value acquired in S31. In this embodiment, a smoothing filter that replaces the average value in the neighborhood area is used, and the window size indicating the neighborhood area is held as a parameter.

In S33, the correction unit 303 corrects the glossiness acquired in S20 based on the window size acquired in S32. When the specular gloss of the coordinates (x, y) obtained in S20 is G _IN (x, y), the window size obtained in S32 is w, and the specular gloss after correction is G _OUT , the specular gloss is It can be corrected by the following (Equation 2).

G _OUT (x, y)=ΣΣ G _IN (x+n, y+m)/w ² (Equation 2)
Here, n and m take a value from −w to +w, and by this processing, a glossy image in which the change in glossiness is smaller in the neighboring region as the distance from the focusing distance is increased can be obtained.

As described above, the image processing apparatus 1 in this embodiment controls the glossiness smoothing process according to the distance information. With such a configuration, the image processing apparatus 1 according to the present exemplary embodiment can perform glossiness correction processing for the purpose of suppressing an unintended sense of depth caused by glossiness without using the glossiness reference value.

[Modification]
In the above-described embodiment, the form in which the gloss level is corrected using the focus distance held in advance in the captured image and the gloss reference value recorded in the storage unit 307 in advance has been described, but the present invention is not limited to this example. For example, the attention distance and the gloss reference value corresponding to the focusing distance in the first embodiment may be accepted via the input of the quantitative value on the UI screen. In this case, unlike the first embodiment, it is not necessary that information corresponding to the focusing distance is added to the image data. In this way, the user can arbitrarily specify the parameters used for the correction of the glossiness to determine the gloss correction range while reflecting the user's intention.

Further, in the above-described embodiment, a mode has been described in which image formation by the gloss control ink, that is, gloss control is performed on the entire area of the image indicated by the image data, but the present invention is not limited to the above example. It is also possible to have a form having an area in which the glossiness is not controlled according to the difference value between the distance recorded in each pixel and the focus distance at the time of image capturing. For example, a process may be performed in which a predetermined threshold value is provided for the difference value, and when the difference value exceeds the threshold value, the recording amount of CL ink used in the area having the position information is set to zero. In this case, the threshold value may be stored in the storage unit 307 in advance, or the user's input may be accepted via the input device 22. In this form, since the change in gloss is not given to the image in the area other than the vicinity of the area of interest, it is possible to perform printing that expresses the desired glossiness and depth feeling of the area of interest.

Further, in the above-described embodiment, the undesired appearance of depth is suppressed by reducing the gloss difference between the non-focused area and its neighboring area, but the present invention is not limited to the above example. By suppressing the difference in gloss between the region of interest and its neighboring region (emphasizing the gloss of one region), it is possible to prevent objects in the region of no interest from appearing in the same position in the depth direction as objects in the region of interest. You may. For example, it is possible to widen the gloss difference in the region of interest by obtaining the maximum value and the minimum value of the glossiness in the region of interest and using them to perform so-called well-known level correction.

Further, in the above-described embodiment, the embodiment in which the gloss correction table previously recorded in the storage unit 307 is used has been described, but the method of acquiring the table is not limited to this. For example, it is possible to directly input the table via the UI screen. Alternatively, it is also possible to assume that a plurality of tables are recorded in the storage unit 307 and the table used for the processing is selected based on the information received via the UI screen. Further, in the above-described embodiment, the embodiment in which the parameter such as the gloss correction coefficient or the window size is derived from the table has been described, but the method of deriving the parameter is not limited to this. For example, it is possible to derive the parameter by a mathematical expression using the difference value of the distance as an argument. Further, in the above-described embodiment, the stepwise gloss correction is applied according to the distance, but the gloss correction method is not limited to this. For example, the correction may be performed by comparing the distance of interest with the distance of each pixel and binarizing the glossiness depending on whether they match. The processing can also be realized by using a gloss correction table in which the correction coefficients in the first embodiment are recorded in binary values of 0 and 1, for example. Further, in the above-described embodiment, the embodiment in which the color information, the gloss information, and the depth information are acquired from one file having a multi-channel image data format has been described, but the format of the input data for obtaining the above information is Not limited to this. For example, three pieces of image data, which are divided into different image files, may be input. Further, the format of the image data is not required as long as the information described in the above-described embodiment can be derived. Further, in the above-described embodiment, the distance of one point is used as the attention distance, but the method of specifying the attention distance is not limited to this. For example, it is possible to obtain the distance between two points and set the area between the two points as the attention distance. In this case, the shortest distance from the position information stored in each pixel to the area between the two points can be specified as the difference value. Further, in the above-described embodiment, the position information, the focusing distance, and the attention distance stored in each pixel are treated as the distance in the depth direction, but the present invention is not limited to the above example. For example, if the relative positional relationship between objects in the image in the depth direction of the image is known, the positional information stored in each pixel, the focusing distance (the in-focus position), the attention distance (the attention position) ) May be coordinates in the depth direction. Further, in the above-described embodiment, the ink is used as the color material, but it is not limited to the above example. For example, a clear toner may be used as the clear color material, or a colored toner may be used as the colored color material.

[Other Examples]
The present invention supplies a program that implements one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program. It can also be realized by the processing. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

DESCRIPTION OF SYMBOLS 1 Image processing device 301 Display control unit 302 Acquisition unit 303 Correction unit 304 First determination unit 305 Second determination unit 306 Formation control unit 307 Storage unit

Claims (13)

A first acquisition unit that acquires, for each pixel of the image, first position information that specifies a position in the depth direction of the image and gloss information that indicates the gloss of the image;
Second acquisition means for acquiring second position information for specifying a position of interest in the depth direction of the image;
A correction unit that corrects the gloss information so as to reduce the gloss difference in the area corresponding to a position different from the position of interest based on the first position information and the second position information;
An image processing apparatus comprising: The first position information is information obtained by imaging,
The image processing apparatus according to claim 1, wherein the attention position is specified as a position in the image where the imaging is focused. The image processing apparatus according to claim 1, wherein the attention position is a position specified by a user's instruction. A third acquisition unit for acquiring a gloss reference value used for correcting the gloss information,
The said correction means makes the glossiness which the said glossiness information of the area|region corresponding to a position different from the said attention position approaches the said gloss reference value, The any one of the Claims 1 thru|or 3 characterized by the above-mentioned. Image processing device. The correction means sets the glossiness of an area corresponding to a position different from the attention position as an average value of the glossiness indicated by the gloss information included in the region corresponding to a position different from the attention position. The image processing apparatus according to any one of claims 1 to 3. The said correction means makes the size of the area|region which calculates the said average value large, so that the distance between the position specified by the said 1st positional information and the said attention position is large. Image processing device. The image processing apparatus according to claim 1, wherein the first position information and the second position information are distances in the depth direction of the image. 7. The image processing device according to claim 1, wherein the first position information and the second position information are coordinates in the depth direction of the image. Based on the corrected gloss information, further has a determination means for determining the recording amount of the clear material,
The image processing apparatus according to claim 1, wherein the image is formed on a recording medium using the clear material. The image processing apparatus according to claim 9, further comprising a formation control unit that forms the image on the recording medium based on the recording amount of the clear material. Further comprising a fourth acquisition means for acquiring a threshold value in the distance between the position specified by the first position information and the position of interest,
The formation control means controls so that recording of the clear material is not performed in a region where a distance between a position specified by the first position information and the target position exceeds the threshold. The image processing device according to item 10. A first acquisition step of acquiring, for each pixel of the image, first position information that specifies a position in the depth direction of the image and gloss information that indicates the gloss of the image;
A second acquisition step of acquiring second position information for specifying a position of interest in the depth direction of the image;
A correction step of correcting the gloss information so as to reduce the gloss difference of a region corresponding to a position different from the position of interest based on the first position information and the second position information;
An image processing method comprising: A program for causing a computer to function as each unit of the image processing apparatus according to claim 1.

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