JP4507082B2 - Catch light synthesis method - Google Patents

Description

  The present invention relates to a catchlight synthesis technique for synthesizing a catchlight with the pupil of an image.

Generally, even when shooting the same subject, the image quality of the shot image varies depending on the shooting situation. For example, when the subject is in direct light facing the sun, the catchlight will naturally enter the pupil and the person's facial expression in the captured image will be vivid. Depending on the angle, the catchlight may not enter the pupil and the person's facial expression may not be visible. In the case of portraits and the like, since the value of the image decreases when the expression is not clear, a technique for improving the image quality is desired.
The technology to correct the pupil selects the red-eye area that needs to be corrected based on the shape, density, position, etc., and if there is a catch light in the selected red-eye area, the catch light is applied to the pupil when correcting the red eye. There is an image processing method to synthesize (for example, see Patent Document 1). In this image processing method, when there is a catch light in the selected red-eye region, that is, the catch light is synthesized at a position where the maximum brightness pixel of the pupil is located.

JP 2000-76427 A

  However, in the image processing method of Patent Document 1, when a catchlight is included in the pupil of the original image, the catchlight can be left in the corrected image. If it is not, you cannot enter a catchlight. When the subject is a person, the shot image without the catchlight in the pupil will not look like a person's expression, but the shot image with the catchlight in the pupil will have a natural and lively expression. Become.

  The present invention has been made in view of the above problems, and an object of the present invention is to improve the expression of the subject and increase the value of the image by putting a catch light in the pupil of the image.

In order to achieve this object, the feature configuration of the catchlight synthesis method according to the present invention is a catchlight synthesis method for synthesizing a catchlight on the pupil of an image, and a correction set on the image by a pupil extraction unit A pupil extracting step for extracting a pupil from the region and the region setting unit divides the extracted pupil into a predetermined number of ring-shaped regions according to the distance from the pupil contour, and the divided ring-shaped regions an area setting step of setting a combining reference point of the catch light based on the area, the catch light setting unit, and the catch-light setting step of setting the shape of the catch light, by the color conversion table selection section, the ring-shaped region A color conversion table selection step of selecting a color conversion table that specifies a color after conversion for each ring-shaped region based on the number of divisions , The correction unit, the synthetic reference points and the shape of the catch light set, as well, is composed of a correction step of the pupil is corrected based on the selected color conversion table, and outputs the pupil with catchlight There is in point.

  Here, the pupil particularly refers to the black eye part excluding the white eye part of the eye. According to the above characteristic configuration, since a catch reference is set by setting a composite reference point in the pupil, a catch light having an arbitrary shape such as a circle, a rectangle, a donut shape, a star shape, or a heart shape can be set in the pupil. Since this synthesis reference point is set based on the ring-shaped region, it can be easily set. Moreover, since the color conversion table is selected based on the number of divisions of the ring-shaped region, the corrected pupil can be made natural. Further, since the pupil is corrected based on the selected color conversion table, the pupil can be corrected by a simple process, and the labor and time for setting the catchlight can be reduced.

Another feature of the catchlight composition method according to the present invention for achieving this object is that the region setting step includes the steps of selecting both eyes when the left and right eyes are extracted from the correction region in the pupil extraction step. The catch light combination reference point is set at the same position of the pupil.
That is, according to the above-described feature configuration, the composite reference point is set at the corresponding position of both the left and right eyes, so that the catch light can be placed at an appropriate position with a simple process, and the corrected pupil is natural with no sense of incongruity. It can be.

Furthermore, another characteristic configuration is that the catch light setting step can set different shapes for both eyes when the pupils of the left and right eyes are extracted from the correction area in the pupil extracting step.
In other words, according to the above-described feature configuration, it is possible to put different catchlights on the left and right eyes, so the catchlight can be set flexibly according to the shooting situation such as the angle of the light and the orientation of the person in the image. And the corrected pupil can be made natural.

  Further, the catch light setting step may be configured to select the shape of the catch light from a plurality of preset basic shapes. With this configuration, the catch light is set with a simple process. It is possible to reduce labor and time for setting the catchlight.

  In addition, the catch light setting step may be configured to change the size of the selected catch light. With this configuration, the basic shape stored in advance can be limited to variations in shape. At the same time, it is possible to precisely cope with the size and shape of the pupil, the shooting situation, and the like.

Furthermore, another feature configuration includes a color conversion table creation step of creating the color conversion table to be used according to the number of divisions of the ring-shaped region by the color conversion table creation unit .
That is, according to the above-described feature configuration, the color conversion table is created according to the ring-shaped region, so that the number of divisions of the ring-shaped region can be set flexibly corresponding to the pupil size and the like. Further, it is not necessary to set a plurality of color conversion tables.

  The present invention also covers a program for causing a computer to execute the above-described catchlight composition method and a medium on which the program is recorded. Such a catchlight composition program is set on the image. A pupil extraction function for extracting a pupil from the correction region, and dividing the extracted pupil into a predetermined number of ring-shaped regions according to the distance from the contour of the pupil, and based on the divided ring-shaped regions Based on the area setting function for setting the catch light combining reference point, the catch light setting function for setting the shape of the catch light, and the number of divisions of the ring area, a conversion result is obtained for each ring area. A color conversion table selection function for selecting a color conversion table designating a color, and the composite reference point and the shape of the set catchlight, Each time, the pupil is corrected based on the color conversion table selected, and a correction function of outputting the pupil with catch light. Naturally, such a catchlight synthesis program can also obtain all the effects of the catchlight synthesis method described above. It is also preferable to add the function according to the dependent claim described in the catchlight synthesis method to the catchlight synthesis program.

  In the present invention, a catchlight combining device that performs the above-described catchlight combining method is also subject to rights, and such a catchlight combining device extracts a pupil from a correction area set on the image. The extraction unit and the extracted pupil are divided into a predetermined number of ring-shaped regions according to the distance from the pupil contour, and the catch light combining reference point is determined based on the divided ring-shaped regions. Select a color conversion table that specifies the color after conversion for each ring-shaped area based on the area setting section to be set, the catchlight setting section that sets the shape of the catchlight, and the number of divisions of the ring-shaped area A color conversion table selection unit that performs the composition reference point and the shape of the catchlight that has been set, and the pupil based on the selected color conversion table Corrected, and a correction unit for outputting a pupil with catch light. Naturally, such a catchlight synthesizing apparatus can also obtain all the effects of the catchlight synthesizing method described above.

Furthermore, another characteristic configuration of the catchlight composition device according to the present invention is configured to display an image display frame for displaying the image, a correction region display frame for displaying the correction region, and a preset basic shape of the catchlight. And a display processing unit that outputs a synthesis operation screen having a sample shape display frame. If comprised in this way, an image, a correction | amendment area | region, and the basic shape of a catchlight can be displayed on the same screen, and pupil correction | amendment can be implemented more easily. It is also preferable to add the configuration according to the dependent claim described in the catchlight composition method to the catchlight composition apparatus.
Other features and advantages of the present invention will become apparent from the following description of embodiments using the drawings.

A first embodiment of a catchlight synthesis technique according to the present invention will be described with reference to the drawings.
FIG. 1 is an external view of a photographic printing apparatus according to the present invention. This photographic printing apparatus includes a printing station 1B as a photographic printer that performs exposure processing and development processing on photographic paper P, and a developed photographic film. 2A, an operation station 1A that processes a captured image taken from an image input medium such as a digital camera memory card 2b and generates / transfers print data used in the print station 1B.

  This photo printing apparatus is also called a digital minilab. As can be understood from FIG. 2, the printing station 1B pulls out the roll-shaped printing paper P stored in the two printing paper magazines 11 and prints it with the sheet cutter 12. The back print unit 13 prints print processing information such as color correction information and frame number on the back side of the photographic paper P, and the print exposure unit 14 cuts the print paper P into the size. The photographed image is exposed on the surface (photosensitive surface) of the photographic paper P, and the exposed photographic paper P is sent to a processing tank unit 15 having a plurality of development processing tanks for development processing. After drying, the photographic paper P, that is, the photographic prints P, sent to the sorter 17 from the transverse feed conveyor 16 at the upper part of the apparatus is collected in a plurality of trays of the sorter 17 in a state of being sorted in order units (see FIG. 1). ).

  A photographic paper transport mechanism 18 is laid to transport the photographic paper P at a transport speed in accordance with various processes for the photographic paper P described above. The photographic paper transport mechanism 18 is composed of a plurality of nipping and transporting roller pairs including a chucker type photographic paper transport unit 18a disposed before and after the print exposure unit 14 in the photographic paper transport direction.

  The print exposure unit 14 applies R (red), G (green), and B (blue) to the printing paper P conveyed in the sub-scanning direction based on print data from the operation station 1A along the main scanning direction. A line exposure head for irradiating laser beams of the three primary colors (1) is provided. The processing tank unit 15 includes a color developing tank 15a for storing a color developing processing liquid, a bleach-fixing tank 15b for storing a bleach-fixing processing liquid, and a stabilizing tank 15c for storing a stable processing liquid.

  At the upper position of the desk-like console of the operation station 1A, there is disposed a film scanner 20 capable of acquiring a photographed image from a photographed image frame of the photographic film 2a with a resolution exceeding 2000 dpi, and is attached to a digital camera or the like. A media reader 21 that acquires captured images from various semiconductor memories, CD-Rs, and the like used as the captured image recording medium 2b is incorporated in a general-purpose personal computer that functions as the controller 3 of the photographic printing apparatus. The general-purpose personal computer is also connected with a monitor 23 for displaying various information, and a keyboard 24 and a mouse 25 as operation input devices used as operation input units used for various settings and adjustments.

  The controller 3 of this photographic printing apparatus has a functional unit for performing various operations of the photographic printing apparatus using hardware and / or software, with the CPU as a core member, as shown in FIG. The function unit particularly related to the present invention includes an image input unit 31 that takes a photographed image read by the film scanner 20 or the media reader 21 and performs pre-processing necessary for the next processing, various windows, and various types. Creation of a graphic operation screen including operation buttons and the like and construction of a graphic user interface (hereinafter abbreviated as GUI) for generating a control command from a user operation input (via the keyboard 24, mouse 25, etc.) through such a graphic operation screen GUI unit 33 and control frames sent from GUI unit 33 A print management unit 32 that performs image processing on the captured image transferred from the image input unit 31 to the memory 30 in order to generate desired print data based on an operation command input directly from the keyboard 24 or the like; A video control unit 35 that generates a video signal for causing the monitor 23 to display graphic data sent from the GUI unit 33, or a simulated image as a print source image, an expected finished print image, or the like during pre-judge printing work such as correction. A print data generation unit 36 that generates print data suitable for the print exposure unit 14 installed in the print station 1B based on the processed captured image that has been subjected to image processing, and a raw capture according to the customer's request Write images and processed shots that have been processed to CD-R Etc. formatter 37 for formatting the like to form for.

  When the photographic image recording medium is the film 2a, the image input unit 31 separately sends the scan data for the pre-scan mode and the main scan mode to the memory 30, and performs preprocessing according to each purpose. When the captured image recording medium is the memory card 2b, when the captured image includes thumbnails (low resolution data), the captured image main data (high data) is used for the purpose of displaying a list on the monitor 23. The thumbnail image is sent to the memory 30 separately from the resolution data. If a thumbnail is not included, a reduced image is created from this data and sent to the memory 30 as a thumbnail.

  The print management unit 32, a print order processing unit 60 that manages the print size, the number of prints, and the like, an image processing unit 70 that performs various image processing on the photographed image developed in the memory 30, and a catch light in the pupil of the image Catch light combining means 80, and means for realizing a photo retouch function such as density correction and resolution conversion. The catchlight combining unit 80 is installed in the print management unit 32 as a program.

  As shown in FIG. 4, the catchlight synthesis unit 80 includes a pupil extraction unit 81, a region setting unit 82, a catchlight setting unit 83, a color conversion table selection unit 85, and a correction unit 87. The pupil extraction unit 81 is a processing unit that performs a pupil extraction step of extracting a pupil from the correction region 41a set on the image, and the region setting unit 82 determines the extracted pupil according to the distance from the outline of the pupil. Is a processing unit that performs an area setting step of setting a catchlight combining reference point based on the divided ring-shaped areas, and the catchlight setting unit 83 A processing unit that performs a catch light setting step for setting a shape, and a color conversion table selection unit 85 selects a color conversion table that specifies a color after conversion for each ring-shaped region based on the number of divisions of the ring-shaped region. The correction unit 87 performs a color conversion table selection step to be performed. The correction unit 87 is based on the set catch light combination reference point and shape, and the selected color conversion table. Correcting the pupil Te is a processing unit that performs a correction step of outputting the pupil with catch light. Furthermore, the catchlight combining means 80 of the present embodiment includes a catchlight storage unit 84 that stores the sample shape of the catchlight, and a color conversion table storage unit 86 that stores a color conversion table corresponding to the number of divisions of the ring-shaped region. And a display processing unit 88 that creates a composition operation screen 40 for catchlight composition processing and displays the composition operation screen 40 on the monitor 23.

  Next, the catch light composition processing procedure of the catch light composition means 80 configured as described above will be described with reference to FIGS. First, a photographed image, specifically, digital image data of the photographed image is captured through the film scanner 20 and the media reader 21 and developed in the memory 30. The digital image data here is stored in the memory 30 in a bitmap format for later processing.

  The catchlight composition means 80 first reads an image developed in the memory 30 and sets a correction area 41a for performing catchlight composition processing. Here, FIG. 5 shows an example of a composition operation screen 40 for performing catchlight composition processing. The composition operation screen 40 includes an image display frame 41 for displaying an image for performing catchlight composition, a correction area display frame 42 for enlarging a correction area 41a cut out from the image, and the shape of the catchlight to be composed. A sample shape display frame 43 for displaying candidates is constructed.

  Specifically, when the display operation unit 88 is activated by the input operation from the keyboard 24 or the mouse 25 and an image to be combined is designated and an image to be combined is designated, the image is read from the memory 30 and the image display frame 41 is read. The designated image is displayed (# 100). When the correction area 41a including the pupil is set on the image of the composition operation screen 40 by an input operation from the keyboard 24 or the mouse 25, the correction area 41a is cut out from the image and displayed in the correction area display frame 42 (# 200). ). The correction area 41a here is a circular area as shown in FIG. For example, an arbitrary region can be freely specified by specifying two predetermined points on the image and one point on the center and the circumference. When the correction area 41a is set, the display processing unit 88 cuts out a circumscribed rectangle 41b of a circle displayed on the image and displays it on the correction area display frame 42 as shown in FIG. Further, the coordinates A on the image of the upper left vertex of the cut out circumscribed rectangle 41b and the coordinates B on the image of the lower right vertex are stored.

  The pupil extraction unit 81 extracts a pupil from the set correction area 41a (# 300). Specifically, black pixels are certified for all the pixels in the correction area 41a, and continuity is evaluated for pixels certified as black pixels. Then, the shape of each black pixel group evaluated as the same region is determined, and a black pixel group having a substantially circular outer shape is detected. When a black pixel group having a substantially circular outer shape is detected, it is extracted as a pupil. In addition, even when pixels of other colors are included in the black pixel group so that correction can be made to the pupils already having the catchlight, extraction is performed as a pupil if the outer shape is circular. Furthermore, as with the case where black is considered as the color of the pupil, for example, red, blue, gold, etc., pixel recognition and continuity evaluation, and the shape of the detected pixel group are determined, When a substantially circular pixel group is detected, it is extracted as a pupil. Then, as shown in FIG. 8, flag 1 is set for pixels extracted as pupils, and flag 0 is set for other pixels. For example, when the left and right pupils are detected from the correction area 41a, flag 1 is set for one of the pupils, flag 0 is set for the other pupil, and one extracted pupil is set. It is configured to correct each one.

  The region setting unit 82 divides the pupil extracted by the pupil extraction unit 81 into ring-shaped regions (# 400). Specifically, as shown in FIG. 9, a flag 1 is set for the pixels in the outer peripheral portion. Then, a flag 2 is set for the inner pixel. Similarly, the flag is sequentially set so that the value increases toward the inner side, thereby dividing into a predetermined number of ring-shaped regions 50. Here, for simplicity, the width of each ring-shaped region 50 is set to one pixel, and the flag 4 is set to the center pixel of the ring-shaped region 50. The maximum value of the flag to be set, that is, the number of divisions of the ring-shaped region 50 may be set in advance, and the width of each ring-shaped region 50 may be adjusted.

  Further, the region setting unit 82 divides the pupil into the ring-shaped regions 50, and then sets, as the synthesis reference point C, a pixel located approximately at the center of the central region where the flag having the maximum value is set. In the present embodiment, the pixel for which the flag 4 is set is set as the catchlight combining reference point C.

  The catchlight setting unit 83 sets the shape and size of the catchlight (# 500). In the present embodiment, sample shapes of a plurality of catchlights are stored in the catchlight storage portion 84, and are configured to be selected from these. Here, a sample shape stored in the catchlight storage unit 84 is displayed in the sample shape display frame 43 on the composition operation screen 40 in FIG. 5, and an arbitrary sample shape is selected from the keyboard 24 or the mouse 25. Is possible. When one of the sample shapes is selected, the size of the sample shape is set according to the size of the pupil to be combined. In addition to the sample shape shown in FIG. 5, for example, a sample shape such as a rectangle, a donut shape, a star shape, or a heart shape may be provided, or it may be configured to be directly input from the keyboard 24 or the mouse 25. Also good. It is also possible to obtain the data from the memory 30 or the like.

  The color conversion table selection unit 85 searches the color conversion table stored in the color conversion table storage unit 86 based on the number of divisions of the ring-shaped region 50 (# 600). The color conversion table storage unit 86 stores a plurality of color conversion tables according to the number of divisions of the ring-shaped region 50, the pupil color, and the like, and each color conversion table includes R (red) and G (green). , B (blue), a converted luminance value is set for each flag value for each of the three primary colors. Here, FIG. 10 shows an example of a color conversion table, and this color conversion table is a color conversion table used when the pupil color is black. When pupils of other colors such as red and gold are extracted by the pupil extraction unit 81, a color conversion table in which RGB luminance values corresponding to these colors are set is selected.

  The correcting unit 87 corrects the pupil based on the set catch light combination reference point C and shape, and the selected color conversion table, and outputs a catch light-equipped pupil (# 700). Specifically, as shown in FIG. 11, the correction unit 87 first masks pixels for which the flag 0 of the correction area 41a is set, that is, pixels that are not subjected to correction other than the pupil (# 701). Subsequently, the correction unit 87 sets a catch light (# 702). Specifically, the catchlight having the shape and size set by the catchlight setting unit 83 is arranged with the synthesis reference point C as the center, and a flag having the maximum value is set for the pixel that becomes the catchlight. Subsequently, the correction unit 87 performs color conversion based on the flag set for each pixel in the correction area 41a (# 703). Specifically, using the flag value of the pixel to be color converted as a key, the color specified in the flag value is searched from the color conversion table, and the color of each pixel of the pupil is converted to the searched color. , Generate a catch-lit pupil. Next, the correcting unit 87 combines the catch-lit pupil with the image (# 704). Specifically, the catch-lit pupil is cut out from the correction area 41a except for the masked pixels, and the catch-lit pupil is placed on the image based on the coordinates A and B stored in the display processing unit 88, and the combined image is synthesized. To process. Finally, the correction unit 87 outputs the corrected image to the memory 30 (# 705).

  If the catchlight combining unit 80 does not continue the combining process, the catchlight combining unit 80 ends the process and ends the combining operation screen 40 (No branch in # 800). If there is a pupil that has not been subjected to the combining process and the combining process is to be continued (Yes branch at # 800), it is confirmed whether or not the catchlight with the same shape is inserted in the left and right pupils (# 801). . When setting a catchlight having a different shape, the above steps are executed again from step # 200 (No branch at # 801). When setting catchlights having the same shape, the above steps except step # 500 are executed again (Yes branch at # 801). In the present embodiment, the catch reference combining point C can be set at the same position on the left and right eyes. In this case, for example, the relative coordinates of the composite reference point C with respect to the pupil are stored when the first step # 400 is executed, and the stored relative coordinates of the composite reference point C are stored when the next step # 400 is executed. Based on the above, the composite reference point C for the pupil to be corrected next is set. With this configuration, the catch light can be placed at the same position on the left and right eyes, and the corrected pupil can be made natural.

  Here, FIG. 12 shows an image a before the synthesis process and an image b obtained by synthesizing the catch-lit pupil. Compared to the image a, the image b has a lively expression of a person, and the value of the image can be increased by using the catchlight combining technique according to the present invention.

  Next, a second embodiment of the catchlight synthesis technique according to the present invention will be described with reference to FIGS. In the first embodiment, the color conversion table to be used is selected from the color conversion table stored in the color conversion table storage unit 86, but the catch light combining means 80 of the present embodiment is as shown in FIG. In addition, a color conversion table creation unit 89 is provided, and this color conversion table creation unit 89 creates a color conversion table to be used according to the number of divisions of the ring-shaped region 50 or edits it from the reference color conversion table. The color conversion table storage unit 86 stores a reference color conversion table used for creating the color conversion table.

  Specifically, as shown in FIG. 14, the color conversion table creation unit 89 creates a color conversion table after setting the catch light in step # 500 (# 900). The color conversion table creating unit 89 uses the reference color conversion table stored in the color conversion table storage unit 86, and the ring-shaped region 50 in which the set number of ring-shaped regions 50 of the reference color conversion table is set in step # 400. If the number of divisions is larger than the number of divisions, a color conversion table is created by reducing the number of settings in the ring-shaped region 50 of the reference color conversion table. When the set number of ring-shaped areas 50 in the reference color conversion table is smaller than the number of divisions of the ring-shaped area 50 set in step # 400, a color conversion table is added. When the set number of ring-shaped areas 50 in the reference color conversion table is the same as the number of divisions of the ring-shaped area 50 set in step # 400, the reference color conversion table can be used as it is. In such a configuration, it is not necessary to prepare a plurality of color conversion tables in advance, and the number of divisions of the ring-shaped region 50 can be set according to the size of the pupil and the like.

  Further, the catchlight synthesis technique according to the present invention can be applied not only to a person but also to an animal pupil. Furthermore, in the first and second embodiments, the present invention is applied to a photographic printing apparatus. However, the present invention is not limited to this, and it is useful to use it as an application program such as a PC (Personal Computer). In this case, the pupil extraction unit 81 may be configured to use known means such as ASP (Application Service Provider) via a network.

External view of photographic printing apparatus employing catchlight synthesis technology according to the present invention Schematic diagram showing the configuration of the print station of the photo printing device Functional block diagram explaining the functional elements built in the controller of the photo printing device The block diagram which shows the structure of the catchlight synthetic | combination means which concerns on this invention The figure which shows an example of the synthetic | combination operation screen of the catchlight synthetic technique which concerns on this invention The flowchart which shows the process sequence of the catchlight synthetic technique which concerns on this invention The schematic diagram which shows the setting procedure of the correction | amendment area | region of the catchlight composition technique which concerns on this invention Schematic diagram showing the pupil extraction procedure of the catchlight synthesis technique according to the present invention Schematic diagram showing the pupil region setting procedure of the catch light synthesis technique according to the present invention Schematic diagram showing an example of a color conversion table Flow chart showing the processing procedure of the pupil correction subroutine The figure which shows the example of the image before and after implementation of the synthetic | combination process by the catchlight synthetic | combination technique which concerns on this invention The block diagram which shows the structure of the catchlight synthetic | combination means which concerns on this invention The flowchart which shows the process sequence of the catchlight synthetic technique which concerns on this invention

Explanation of symbols

80 Catch Light Combining Unit 81 Pupil Extraction Unit 82 Area Setting Unit 83 Catch Light Setting Unit 85 Color Conversion Table Selection Unit 87 Correction Unit

Claims (9)

A catch light synthesis method for synthesizing a catch light to the pupil of an image,
A pupil extracting step of extracting a pupil from a correction region set on the image by a pupil extracting unit ;
The area setting unit divides the extracted pupil into a predetermined number of ring-shaped areas according to the distance from the outline of the pupil, and based on the divided ring-shaped areas, the catch light combining reference point An area setting step for setting
A catch light setting step for setting the shape of the catch light by a catch light setting unit ;
A color conversion table selection step of selecting a color conversion table specifying a color after conversion for each ring-shaped region based on the number of divisions of the ring-shaped region by a color conversion table selecting unit ;
The correction unit includes a correction step of correcting the pupil based on the set reference point and the shape of the catchlight, and the selected color conversion table, and outputting a catchlight-attached pupil. Catch light synthesis method.   The said area | region setting step sets the synthetic | combination reference point of the said catchlight to the same position of the eyes of both eyes, when the pupils of both eyes on the left and right are extracted from the said correction | amendment area | region in the said pupil extraction step. Catch light synthesis method.   3. The catch light synthesis method according to claim 1, wherein the catch light setting step can set different shapes for both eyes when the pupils of the left and right eyes are extracted from the correction area in the pupil extraction step.   The catchlight synthesis method according to any one of claims 1 to 3, wherein the catchlight setting step selects a shape of the catchlight from a plurality of preset basic shapes.   The catchlight composition method according to claim 4, wherein the catchlight setting step changes a size of the selected catchlight. The catchlight composition method according to any one of claims 1 to 5, further comprising a color conversion table creation step of creating the color conversion table to be used according to the number of divisions of the ring-shaped region by a color conversion table creation unit. . A catchlight synthesis program that synthesizes a catchlight with the pupil of an image,
A pupil extraction function for extracting a pupil from a correction area set on the image;
A region setting that divides the extracted pupil into a predetermined number of ring-shaped regions according to the distance from the outline of the pupil, and sets a reference point for the catchlight based on the divided ring-shaped regions Function and
A catch light setting function for setting the shape of the catch light;
A color conversion table selection function for selecting a color conversion table specifying a color after conversion for each ring-shaped region based on the number of divisions of the ring-shaped region;
Catchlight synthesis for causing the computer to execute a correction function for correcting the pupil based on the set reference point and shape of the catchlight, and the selected color conversion table, and outputting a pupil with catchlight. program. A catch light synthesizer that synthesizes a catch light with the pupil of an image,
A pupil extraction unit that extracts a pupil from a correction region set on the image;
A region setting that divides the extracted pupil into a predetermined number of ring-shaped regions according to the distance from the outline of the pupil, and sets a reference point for the catchlight based on the divided ring-shaped regions And
A catch light setting unit for setting the shape of the catch light;
A color conversion table selection unit that selects a color conversion table that specifies a color after conversion for each ring-shaped region based on the number of divisions of the ring-shaped region;
A catch light combining device configured to correct the pupil based on the set synthesis reference point and the shape of the catch light and the selected color conversion table, and output a catch light-equipped pupil .   A display processing unit for outputting a composition operation screen having an image display frame for displaying the image, a correction region display frame for displaying the correction region, and a sample shape display frame for displaying a preset basic shape of the catchlight. A catchlight synthesizing device according to claim 8.

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