JP2014011505A - Image processing apparatus and image processing method, print manufacturing apparatus and print manufacturing method, image processing program, and printed material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image processing method which can realistically reproduce a three-dimensional subject having irregularity on a printed material or the like.SOLUTION: An image processing apparatus 10 captures an image of a three-dimensional subject with a three-dimensional scanner 20 which can acquire an image of a three-dimensional subject generating a shade due to irregularity of the surface, and performs image processing to the captured image. The image processing apparatus 10 comprises instruction means (CPU 14) for instructing to capture an image of a three-dimensional subject with an exposure amount to capture an image less brighter by a first predetermined amount than when the image is captured with a predetermined exposure amount; first brightness increasing means (CPU 14) for increasing the brightness of the captured image by a second predetermined amount which is less than the first predetermined amount; and second brightness increasing means (CPU 14) for increasing the brightness of the image, having its brightness increased by the first brightness increasing means, by an increasing amount as much as that of a median side so that the brightness of the image on the median side is approximately equal to the brightness at a predetermined exposure.

Description

  The present invention relates to an image processing apparatus that performs image processing on an image obtained by scanning a three-dimensional object, an image processing method, an image processing program, a printed material manufacturing apparatus and a printed material manufacturing method for manufacturing a printed material of an image generated by the image processing. And a printed matter manufactured by the manufacturing apparatus or the manufacturing method.

  For example, Patent Document 1 discloses a three-dimensional scanner that can acquire an image in which a shadow caused by unevenness of a three-dimensional object is generated by light from a light source of the three-dimensional object.

JP 2009-182959 A

  Even when an image is acquired using the above three-dimensional scanner, a sufficient three-dimensional effect may not be obtained when visually recognized.

  The present invention provides an image processing method and the like that can more realistically reproduce a three-dimensional object having unevenness in a printed matter.

  The inventor of the present application has made various studies on the reason why a sufficient stereoscopic effect cannot be obtained when viewing an image acquired using a stereoscopic scanner, and has obtained the following knowledge.

  Humans perceive a three-dimensional space based on a two-dimensional retinal image projected on the retina. Specifically, when humans perceive a three-dimensional space, based on various cues, information about depth lost in a two-dimensional retinal image is estimated and supplemented in the brain. That is, even if the object to be perceived is a two-dimensional image, if there is a clue for depth perception in the image, a human perceives the two-dimensional image in three dimensions. One of the clues for perception of depth is “shadow”. If this “shadow” can be expressed on an image, even a two-dimensional image can be perceived three-dimensionally by humans.

  However, even if a three-dimensional image is scanned by a general two-dimensional scanner, a “shadow” cannot be expressed. Even when a three-dimensional scanner is used, a sufficient three-dimensional effect may not be obtained as described above.

  The scanner acquires a subject as image data including luminance data of three primary colors of RGB. For example, the image data is acquired as 256-level luminance values from 0 to 255 for each of RGB colors. When the color and brightness of the subject is high, at least one color corresponding to the subject color among the three primary colors RGB may be saturated on the high luminance side during scanning. For example, if the subject is a red three-dimensional subject with irregularities, and the subject is a three-dimensional subject in which shading due to the irregularities occurs on the surface depending on the direction of light, such a subject is exposed to a general amount of exposure. In the case of scanning with, the R image data of the bright red portion of the subject may cause color saturation. That is, the gradation of the part in the image is lost. If there is a shadow in the color saturated portion, the shadow existing in the portion is not acquired as image data. The shadow disappears in the reproduced image. Therefore, the “shadow” cannot be reproduced in the image.

  As described above, “shading” is a very important element for expressing a three-dimensional effect in an image or printed matter, and it is sufficient even if a three-dimensional scanner is used that data regarding this “shadow” cannot be acquired by color saturation. This is considered to be a cause of the case where an image with a three-dimensional effect cannot be obtained. Therefore, in order to obtain a sufficient three-dimensional effect in images, printed materials, etc. (in order to reproduce the texture of a three-dimensional object and make it look real), it is possible to reliably acquire fine “shadows” on the surface of the object as image data. There is a need to.

  In view of such knowledge, the present invention adopts the following configuration.

The image processing apparatus according to the present invention acquires a three-dimensional object image by a three-dimensional scanner capable of acquiring a three-dimensional object image that is shaded by surface irregularities, and performs image processing on the acquired image. This image processing device
Instruction means for instructing the stereoscopic scanner to acquire an image of the stereoscopic subject with an exposure amount at which an image having a brightness that is smaller by a first predetermined amount than when acquired with the predetermined exposure amount is acquired;
Image processing means for performing image processing on the acquired image,
The image processing means
First brightness increasing means for increasing the brightness of the acquired image by a second predetermined amount smaller than the first predetermined amount;
For an image whose brightness has been increased by the first brightness increase means, the median side increases so that the brightness on the median side of the image is approximately equal to the brightness at the predetermined exposure. Second brightness increasing means for increasing the brightness of the image by the amount.

The printed matter manufacturing apparatus of the present invention comprises:
An image processing apparatus of the present invention;
And a printing apparatus that prints an image processed by the image processing apparatus of the present invention.

According to the image processing method of the present invention, an image of a three-dimensional object is acquired by a three-dimensional scanner that can acquire an image of a three-dimensional object that has been shaded by surface unevenness, and image processing is performed on the acquired image by a calculation unit. This image processing method
The computing means is
An instruction step for instructing the stereoscopic scanner to acquire an image of a stereoscopic subject with an exposure amount at which an image having a brightness that is smaller by a first predetermined amount than when acquired with a predetermined exposure amount;
An image processing step for performing image processing on the acquired image,
The image processing step
A first brightness increase step for increasing the brightness of the acquired image by a second predetermined amount smaller than the first predetermined amount;
For an image whose brightness has been increased, the brightness of the image is increased by a larger increase amount toward the median side so that the brightness on the median side of the image is substantially equal to the brightness at the predetermined exposure. A second brightness increasing step for increasing.

The printed matter manufacturing method of the present invention comprises:
Steps included in the image processing method of the present invention;
And a printing step for printing an image obtained by the image processing method of the present invention.

  The image processing program of the present invention causes a computer to execute the image processing method of the present invention.

The printed matter of the present invention is
A transparent film,
An image layer obtained by the image processing method of the present invention, printed on one side of the transparent film;
A metal coating layer formed on the surface of the image layer opposite to the transparent film.

The printed matter of the present invention is
A transparent film,
An image layer obtained by the image processing method of the present invention, printed on one side of the transparent film;
And an ink layer having a color corresponding to the color characteristics of the image formed on the surface of the image layer opposite to the transparent film.

  In the present invention, an image of a three-dimensional object is acquired with an exposure amount at which an image having a brightness that is smaller by a first predetermined amount than when acquired with a predetermined exposure amount. The first predetermined amount is the amount of decrease in the exposure amount with respect to the predetermined exposure amount so as not to cause color saturation or the like in the shadow generated in the portion when the portion with high saturation or lightness in the subject is scanned. It is. As a result, it is possible to acquire an image of a three-dimensional object without causing color saturation or the like in a shadow generated in a portion with high saturation or lightness in the three-dimensional object. However, the image acquired in this way is an image that gives a dark impression as a whole when viewed. Therefore, it is necessary to increase the brightness of the image. However, if the brightness is uniformly increased, the shade of the portion with high saturation or lightness (high brightness portion) in the image is lost due to color saturation.

  For this reason, in the present invention, the brightness of the image acquired by the stereoscopic scanner is further increased by a second predetermined amount. For example, the luminance of each color of RGB is uniformly increased by the same amount. The second predetermined amount is an increase amount that does not cause color saturation even when the brightness of the image is increased. That is, the second predetermined amount is an increase amount that does not cause the shadow of the image to disappear even when the brightness of the image is increased. It should be noted that the second predetermined amount has a great influence on the stereoscopic effect of the image even when color saturation occurs due to the shadow on the high luminance side among the shadows of the high luminance portion in the image when the brightness of the image is increased. It may be the amount of increase in which the shadow that does not give is lost.

  Next, with respect to an image whose brightness has been increased, the median side has a larger increase amount so that the brightness on the median side of the image is substantially equal to the brightness at the predetermined exposure. Increase brightness. As a result, the brightness on the median side occupying most of the image becomes the brightness at the time of the predetermined exposure amount, and the image gives a natural impression as a whole. At this time, since the brightness on the high luminance side does not change much, it is possible to prevent the shadow on the high luminance side from disappearing due to color saturation as much as possible.

  As described above, according to the present invention, it is possible to obtain an image with a natural impression as a whole while preventing disappearance due to color saturation of a shadow that easily affects the stereoscopic effect of the image. That is, it is possible to obtain an image with a natural impression as a whole while giving a good stereoscopic effect. Therefore, it is possible to reproduce a three-dimensional object with unevenness in a printed matter more realistically.

It is a block diagram of the printed matter manufacturing apparatus of Embodiment 1. It is a flowchart of printed matter manufacture. It is explanatory drawing, such as image processing of this embodiment. It is a figure which shows the image taken in with the three-dimensional scanner. It is a flowchart of an image process. It is a figure which shows an example of the image before and behind performing the process which raises brightness entirely. It is explanatory drawing of the process of step S12. It is a figure which shows an example of the image before and after performing a color adjustment while raising brightness centering on an intermediate brightness part. It is explanatory drawing of an outline emphasis process. It is a figure which shows an example of an outline emphasis process. It is explanatory drawing of the printed matter manufacturing method of Embodiment 2. FIG. It is explanatory drawing of the printed matter manufacturing method of Embodiment 3. FIG. 10 is a flowchart of a printed matter manufacturing method of Embodiment 3. It is explanatory drawing of the printed matter manufacturing method of other embodiment. It is the figure which compared the printed matter produced with the printed matter manufacturing method of other embodiment, and the conventional printed matter.

  Hereinafter, this embodiment will be described.

(Embodiment 1)
1. Configuration of Printed Product Manufacturing Apparatus FIG. 1 is a configuration diagram of a printed product manufacturing apparatus according to the present embodiment. The printed material manufacturing apparatus according to the present embodiment is a device capable of manufacturing a printed material that gives a good stereoscopic effect.

  The printed material manufacturing apparatus 1 includes an image processing apparatus 10 and a printing apparatus 30. The image processing apparatus 10 is connected to the stereoscopic scanner 20.

  The stereoscopic scanner 20 can scan a stereoscopic subject. The stereoscopic scanner 20 acquires a subject as image data including luminance data of RGB three primary colors. The image data is acquired as 256-level luminance values of, for example, 0 to 255 in each RGB color. The three-dimensional scanner 20 includes a scanner head having a light source and a line CCD. The light source is composed of, for example, two white fluorescent lamps arranged in parallel at a predetermined interval. The three-dimensional scanner 20 can change the attitude of the scanner head with respect to the subject placement surface. Thereby, the reading angle of the line CCD with respect to the subject placement surface can be changed (multi-angle scanner), and the irradiation position of the light source on the subject can be changed. With such a configuration, the three-dimensional scanner 20 can acquire an image in which a shadow due to unevenness existing on the surface of the three-dimensional object is generated. Furthermore, it is possible to adjust how the shadow is generated. Note that only one of the two white fluorescent lamps constituting the light source may be used. Thereby, a shadow can be produced more clearly. As the stereoscopic scanner 20, for example, Scamera (registered trademark) manufactured by Newly Co., Ltd. can be used.

  The image processing apparatus 10 performs image processing to be described later on the image output from the stereoscopic scanner 20. The image processing apparatus 10 can be configured by a computer.

  The printing apparatus 30 prints the image processed by the image processing apparatus 10. Various printing devices can be used as the printing device 30. For example, an inkjet printer or an offset printer can be used.

2. Configuration of Image Processing Device The image processing device 10 includes a computer main body 11, a display 12, and an operation unit 13.

  The display 12 displays an image output from the computer main body 11.

  The operation unit 13 is a device for the user to instruct the computer main body 11 to perform image processing. The operation unit 13 can be configured by a keyboard, a mouse, a touch panel, or the like, for example.

  The computer main body 11 includes a CPU 14, a storage unit 15, a scanner interface 16, a print interface 17, a display interface 18, and an operation interface 19.

  The CPU 14 performs various arithmetic processes.

  The storage unit 15 stores an image processing program that causes a computer to function as the image processing apparatus 10. The storage unit 15 stores image data to be subjected to image processing by the computer, image data after image processing, and the like. The storage unit 15 can be configured with a hard disk, a semiconductor memory, or the like.

  The scanner interface 16 exchanges various data with the stereoscopic scanner 20. For example, the CPU 14 outputs a scanning instruction signal to the stereoscopic scanner 20 via the scanner interface 16 and inputs image data obtained by scanning by the stereoscopic scanner 20.

  The print interface 17 transmits image data subjected to image processing in the computer main body 11 to the printing apparatus 30. The CPU 14 outputs, for example, a printing instruction signal and image data to be printed to the printing apparatus 30 via the printing interface 17. The image data to be printed may be transferred to the printing apparatus 30 using a recording medium. In this case, the print interface 17 may not be provided.

  The display interface 18 transmits display data such as an image subjected to image processing in the computer main body 11 to the display 12.

  The operation interface 19 transmits a signal output from the operation unit 13 to the computer main body 11. For example, the operation unit 13 can output a signal for controlling execution of the image processing program to the CPU 14 via the operation interface 19.

3. Operation of Printed Product Manufacturing Apparatus The operation of the printed product manufacturing apparatus 1 will be described with reference to FIG. FIG. 2 is a flowchart of the printed material manufacturing process performed by the printed material manufacturing apparatus 1.

  First, the stereoscopic scanner 20 scans a stereoscopic subject (S1). Specifically, the CPU 14 of the image processing apparatus 10 outputs a scanning instruction signal to the stereoscopic scanner 20 via the scanner interface 16. The scanning instruction signal is, for example, a scanning start signal, a signal indicating a scanning condition, or the like. The signal indicating the scanning condition is, for example, a signal related to scanning optical resolution and exposure amount. The stereoscopic scanner 20 scans a stereoscopic subject and outputs image data acquired by scanning. The optical resolution of scanning is set to 600 dpi, for example. The scanner head of the three-dimensional scanner 20 is set at a position where a desired shadow is generated due to the unevenness of the scan target.

  The setting of the exposure amount at the time of scanning will be described with reference to FIG. FIG. 3 is a diagram for explaining an example of image processing by the image processing apparatus according to the present embodiment. Specifically, as an example, a relationship between a plurality of pixels constituting one horizontal line with an image and luminance is shown. This example shows a case where the luminance of one horizontal line increases toward the right side in the horizontal direction.

  Line A shows an example of luminance when an image of a stereoscopic subject is acquired with an appropriate exposure amount. The appropriate exposure amount is an exposure amount at which the acquired image is expressed with natural brightness when viewed from a human. For example, the exposure amount is such that the average brightness of the acquired image is 18% gray. 18% gray has a brightness that looks sensibly the same when viewed from white or black when the brightness changes from dark (0) to light (100) in the color space, and its reflection. The rate is 18% gray.

  Here, in the stereoscopic scanner, a dynamic range of luminance that can be acquired is determined. For example, the stereoscopic scanner expresses the luminance of the subject in 256 levels from 0 to 255 according to the magnitude of the signal input from the line CCD. However, when the magnitude of the signal input from the line CCD exceeds the magnitude corresponding to 255, it is recorded as the maximum value 255 (luminance saturation). Therefore, for example, as shown by line A in FIG. 3, the luminance characteristic of the high luminance portion on the right side in the horizontal direction is changed from the original as shown by the dotted line to the horizontal flat one as shown by the solid line due to luminance saturation. End up. Then, when the shadow of the subject (luminance dent) exists in the high luminance part, the shadow disappears from the part of the image acquired by the scanner.

  In order to cope with this problem, in this embodiment, the exposure amount at the time of scanning is set to an amount smaller than the appropriate exposure amount by a first predetermined amount as shown in FIG. As shown in FIG. 3, the first predetermined amount is a reduction in the exposure amount with respect to the appropriate exposure amount so as not to cause color saturation or the like in the shade of the portion with high saturation or lightness in the subject during scanning. Amount. By performing scanning with the exposure amount reduced in this way, it becomes possible to satisfactorily acquire a fine “shadow” on the uneven surface of the subject that disappears when an image is acquired with an appropriate exposure amount. .

  The CPU 14 of the image processing apparatus 10 inputs image data acquired by scanning in the stereoscopic scanner 20 via the scanner interface 16.

  FIG. 4 shows an image acquired by the stereoscopic scanner 20. Specifically, FIG. 4A shows an image obtained by scanning the exposure amount by a first predetermined amount smaller than the appropriate exposure amount as in step S1. FIG. 4B shows an image scanned with an appropriate exposure amount. FIG. 4C shows an image scanned by a general two-dimensional scanner instead of the stereoscopic scanner 20. The image in FIG. 4A is a dark image as a whole as compared with the images in FIG. 4B and FIG. The image of FIG. 4C scanned with a general two-dimensional scanner has no stereoscopic effect. In the image of FIG. 4B scanned with an appropriate exposure amount, the shadow of the portion with high saturation and lightness in the subject (high luminance portion in the image data) is lost.

  Next, the CPU 14 of the image processing apparatus 10 performs image processing on the image data acquired from the three-dimensional scanner 20 to enable more natural three-dimensional expression of the image (S2). Specific contents of this image processing will be described later.

  Next, the CPU 14 of the image processing apparatus 10 instructs the printing apparatus 30 to print (S3). Specifically, the CPU 14 of the image processing apparatus 10 outputs a print instruction signal and print data for the image subjected to the image processing in step S <b> 2 to the printing apparatus 30 via the printing interface 17. The printing apparatus 30 executes printing based on the instruction signal received from the image processing apparatus 10 and the printing data. The image processing apparatus 10 outputs a print start signal, a signal indicating a print condition, and the like as a print instruction signal. As described above, the transfer of image data from the image processing apparatus 10 to the printing apparatus 30 may be performed using a recording medium. The number of printed lines is, for example, high-definition printing of 260 lines or more. For example, a mat black ink is used as the black ink.

3. Operation of Image Processing Device The operation of the image processing device 10 will be described with reference to FIG. FIG. 5 is a flowchart of image processing performed by the image processing apparatus 10 to enable a more natural three-dimensional expression of an image.

  First, the CPU 14 of the image processing apparatus 10 performs a process of increasing the brightness of the image on the image data acquired in step S1 (S11). For example, the luminance magnitudes indicated by the R, G, and B luminance data constituting the image are increased by a constant ratio, the same amount, or substantially the same amount. That is, the brightness of the image is increased so that the color balance of the image does not change or the color balance of the image does not change so much. For example, the image processing apparatus 10 increases the brightness of the image by a second predetermined amount as indicated by a line C in FIG. The second predetermined amount is an increase amount that does not cause color saturation on the high luminance side even when the brightness of the image is increased. That is, the second predetermined amount is an increase amount that does not cause the shadow in the image to disappear even when the brightness of the image is increased. It should be noted that the second predetermined amount has a great influence on the stereoscopic effect of the image even when color saturation occurs due to the shadow on the high luminance side among the shadows of the high luminance portion in the image when the brightness of the image is increased. It may be the amount of increase in which the shadow that does not give is lost. In other words, the second predetermined amount may be an increase amount that eliminates only the shadow that does not significantly affect the stereoscopic effect of the image when the brightness of the image is increased.

  Note that the image processing program causes the image processing apparatus 10 to realize a function equivalent to an image processing function realized by an existing application. As an existing application, for example, Adobe Photoshop (registered trademark) of Adobe System may be considered. In step S11, the image processing apparatus 10 is realized when a parameter related to the exposure amount of Adobe Photoshop (registered trademark) is set to a predetermined value between 0.50 and 0.99 instead of the default 0. Perform processing to realize the same function as Note that the above functions may be realized by cooperation between the image processing program of the present embodiment and an existing application.

  FIG. 6 shows an example of images before and after the process in step S11. Specifically, FIG. 6A shows an image before the process for increasing the brightness of the image, and FIG. 6B shows an image after the process for increasing the brightness of the image. For example, in a certain pixel, when the values indicating the brightness before processing, for example, the luminance values of R, G, and B are R: 56, G: 55, and B: 49, the luminance values of R, G, and B The value is increased by approximately the same amount to R: 75, G: 74, B: 66. As a result, the image of FIG. 6A that receives a dark impression before the process of increasing the brightness has a brightness close to the subject while retaining the shadow after the process, as shown in FIG. 6B. It becomes an image.

  Next, the CPU 14 of the image processing apparatus 10 further adjusts the brightness of the image whose brightness is increased in step S11 so that the brightness on the median side of the image is substantially equal to the brightness at the appropriate exposure. The brightness of the image is increased by a larger increase amount toward the median side (S12). FIG. 7 shows an example of the characteristics of the brightness increase amount in this processing. The characteristic of this example is a curved characteristic in which the amount of increase is 0 at the minimum and maximum values of brightness, and the amount of increase is maximum at the center between the minimum and maximum values. As a result of such processing, as shown by the line D in FIG. 3, the brightness on the median side that occupies a large part of the image becomes almost the brightness at the time of proper exposure, and the image gives a natural impression as a whole. . At this time, since the brightness on the high luminance side does not change much, it is possible to prevent the shadow on the high luminance side from disappearing due to color saturation as much as possible. Note that the characteristic is not limited to the characteristic in which the amount of increase is the maximum at the center between the minimum value and the maximum value, and may be a characteristic in which the amount of increase is in the vicinity of the center, for example. In this step S12, the image processing apparatus 10 has the same function as that realized when the Adobe Photoshop (registered trademark) tone curve parameter is set to a predetermined value between 129 and 150 instead of the default 128. Performs processing to realize the function. The setting can be performed in 256 steps from 0 to 255.

  Next, the CPU 14 of the image processing apparatus 10 performs a process of adjusting the color of the image whose brightness has been increased in step S12 (S13). Specifically, when the brightness of the image is increased as in step S12, a color shift may occur with respect to the color generated in the subject due to the predetermined standard light. Therefore, a process is performed to correct the color of the subject in the image so as to approach the color generated in the subject by predetermined standard light. The predetermined standard light is light having a predetermined color temperature. The predetermined color temperature is, for example, 5000K, but is not limited thereto. In this step S13, the image processing apparatus 10 is realized when a predetermined value between 1.01 and 1.5 is set instead of the default 1 in the level correction parameter of Adobe Photoshop (registered trademark). Perform processing to realize the same function as If no color misregistration occurs, the process of this step need not be performed.

  FIG. 8 shows an example of images before and after the processing in steps S12 and S13. Specifically, FIG. 8A shows an image before the processing in steps S12 and S13, and FIG. 8B shows an image after the processing.

  Next, the CPU 14 of the image processing apparatus 10 performs a process of enhancing the contour of the subject in the image (S14). Specifically, as shown in FIG. 9, a portion (contour (boundary)) where the difference in brightness (luminance) in the image is equal to or greater than a predetermined value is detected, and within a predetermined range on both sides of the contour portion (boundary). A process of enlarging the difference in brightness (luminance) is performed. In step S14, the image processing apparatus 10 sets a predetermined value between 10% and 50% in place of the default 0% in the parameter of the Adobe Photoshop (registered trademark) unsharp mask, and the unsharp mask. A process for realizing a function equivalent to the function realized when the radius parameter is set to a predetermined value between 1.01 and 1.5 instead of the default 0 is performed.

  FIG. 10 shows an example of images before and after the process in step S14. Specifically, FIG. 10A shows an image before performing the process of enhancing the contour of the subject in the image, and FIG. 10B shows the image after performing the process of enhancing the contour of the subject in the image. Images are shown. As can be seen from FIG. 10B, the stereoscopic effect of the image is further enhanced by performing the process of enhancing the contour of the subject in the image.

  Next, the CPU 14 of the image processing apparatus 10 stores in the storage unit 15 the image that has been subjected to the process of enhancing the contour of the image in step S14 (S15).

 Note that when printing is performed in step S3 of FIG. 1, RGB format image data is converted into CMYK format image data suitable for printing. When converted in this way, the color or the like of the image may become turbid or dark. To deal with this, the following steps may be executed after step S15 is completed.

  That is, correction for reducing the brightness of C (cyan) and K (black) may be performed. Specifically, the brightness of C (cyan) is decreased by a predetermined value between 1 and 5%, and the brightness of K (black) is decreased by a predetermined value between 3 and 5%. This data is stored as printing data, and is output from the image processing apparatus 10 to the printing apparatus 30 during printing. In this step, the image processing apparatus 10 sets -1% to -5% instead of the default 0% in the C (cyan) parameter of the tone curve of Adobe Photoshop (registered trademark), and sets the K ( In the black parameter, processing for realizing a function equivalent to the function realized when the parameter is set to −3% to −5% instead of the default 0% is performed.

4). Summary 4-1. Configuration The image processing apparatus 10 according to this embodiment includes:
A three-dimensional object image is acquired by the three-dimensional scanner 20 that can acquire an image of a three-dimensional object that has been shaded by surface irregularities, and image processing is performed on the acquired image. The image processing apparatus 10
Instruction means (CPU 14) for instructing the stereoscopic scanner 20 to acquire an image of a stereoscopic subject with an exposure amount at which an image having a brightness that is smaller by a first predetermined amount than when acquired with a predetermined exposure amount is acquired;
First brightness increasing means (CPU 14) for increasing the brightness of the acquired image by a second predetermined amount smaller than the first predetermined amount;
For an image whose brightness has been increased by the first brightness increase means, the median side increases so that the brightness on the median side of the image is approximately equal to the brightness at the predetermined exposure. Second brightness increasing means (CPU 14) for increasing the brightness of the image by an amount,
Image processing device.

Preferably, the image processing means (CPU 14)
Color correcting means (CPU 14) for correcting the color of the subject in the image so as to approach the color generated in the subject by predetermined standard light with respect to the image whose brightness has been increased by the first and second brightness increasing means. Further included.

Preferably, the image processing means (CPU 14)
The image processing apparatus further includes contour enhancement means (CPU 14) for enhancing the contour of the subject included in the image.

Preferably, the image processing means (CPU 14)
Image format conversion means for converting RGB format image data to CMYK format image data;
Brightness reduction means for reducing the lightness of the C and K colors converted by the image format conversion means by a third predetermined amount and a fourth predetermined amount;

The printed material manufacturing apparatus 1 of the present embodiment includes an image processing apparatus 10,
And a printing apparatus 30 that prints an image processed by the image processing apparatus 10.

In the image processing method of this embodiment, an image of a three-dimensional object is acquired by the three-dimensional scanner 20 that can acquire an image of a three-dimensional object that has been shaded due to unevenness on the surface, and an image is calculated by the calculation means (CPU 14) on the acquired image. Process. This image processing method
The computing means (CPU 14)
An instruction step (S1) for instructing the three-dimensional scanner 20 to acquire the image of the three-dimensional object with an exposure amount by which an image having a brightness that is smaller by a first predetermined amount than that acquired with a predetermined exposure amount is acquired; ,
An image processing step (S2) for performing image processing on the acquired image,
The image processing step (S2)
A first brightness increase step (S11) for increasing the brightness of the acquired image by a second predetermined amount smaller than the first predetermined amount;
With respect to the image whose brightness has been increased in the first brightness increasing step, the median value side so that the brightness on the median side of the brightness of the image is substantially equal to the brightness at the predetermined exposure time. A second brightness increase step (S12) for increasing the brightness of the image by a large increase amount.

Preferably, the image processing step (S2) includes
A color correction step (S13) is further included for correcting the color of the subject in the image so as to approach the color generated in the subject by predetermined standard light with respect to the image whose brightness has been increased in the second brightness increase step. .

Preferably, the image processing step (S2) includes
It further includes a contour emphasizing step (S14) for emphasizing the contour of the subject included in the image.

Preferably, the image processing step (S2) includes
An image format conversion step for converting image data in RGB format into image data in CMYK format;
A lightness reduction step of reducing the lightness of the C and K colors converted by the image format conversion means by a third predetermined amount and a fourth predetermined amount;

The printed matter manufacturing method of the present embodiment includes step (S2) included in the image processing method,
And a printing step (S3) for printing an image obtained by the image processing method.

4-2. Effect With the above configuration, it is possible to obtain an image with a natural impression as a whole while preventing disappearance due to color saturation of shadows that easily affect the stereoscopic effect of the image. That is, it is possible to obtain an image with a natural impression as a whole while giving a good stereoscopic effect. Therefore, it is possible to reproduce a three-dimensional object with unevenness in a printed matter more realistically.

  In the present embodiment, the processing in step S11 and the processing in step S12 are performed separately. However, the processing may be performed at once with the characteristics obtained by adding the characteristics of the increase in brightness in both steps.

(Embodiment 2)
In the second embodiment, an example will be described in which a plurality of images are acquired by scanning, the above-described image processing is performed on each of the acquired images, and a single image is generated by combining these images. To do. In addition, you may perform a process in order to further give a three-dimensional effect with respect to the image produced | generated by combining several images. An example of this process will be described with reference to FIG.

  FIG. 11 is an explanatory diagram of a method for producing a printed material according to the second embodiment. In the present embodiment, a case where two images A and B are used will be described. The images A and B are subjected to the image processing described in the first embodiment. The image A is an image obtained by performing the above image processing on an image obtained by capturing Japanese paper having irregularities on the surface. The image B is an image obtained by performing the image processing on an image obtained by capturing a flower (subject).

  First, the subject portion B ′ is masked (cut out) from the image B.

  Next, a subject part B ′ is arranged at a predetermined position in the image A, and a shadow C is added to a predetermined part around the subject part B ′ to generate an image D. Then, the image D is stored in the storage unit 15.

  When two subjects are overlapped and scanning is performed at the same time, there is a problem that the focus position of one of the subjects is shifted, and the texture of the subject (for example, a shadow due to unevenness of the subject) cannot be sufficiently extracted. However, as in the present embodiment, by performing individual scanning, the textures of both subjects can be sufficiently extracted. As a result, the combined image is also an image in which the texture of the subject is sufficiently extracted.

(Embodiment 3)
In the present embodiment, a printed matter in which an image obtained by the image processing method described in Embodiments 1 and 2 is printed on one surface of the transparent film, a manufacturing apparatus and a manufacturing method thereof will be described.

1. Configuration of Printed Material As shown in FIG. 12, the printed material of the present embodiment has an image (for example, a painting) processed by the image processing method of Embodiment 1 printed on one surface (back surface) of the transparent film, A frame-like pattern is printed on the peripheral portion of the other surface (front surface). That is, the printed matter is printed on the transparent film, the image layer obtained by the image processing method of Embodiment 1 or 2 printed on one side of the transparent film, and the peripheral portion of the other side of the transparent film. And a frame-like pattern layer. The frame-shaped pattern may be obtained by the image processing method according to the first or second embodiment.

2. Manufacturing Method The UV offset method is used as the printing method.

  A transparent film for printing (PET) having a thickness of 0.3 mm or more is used as the transparent film. Depth can be expressed by using a transparent film having a thickness. Further, at least the surface of the transparent film (the surface opposite to the surface on which printing is performed) has a gloss.

  The number of print lines is 200 lines or more. Thereby, the overlapping of halftone dots is reduced, and the printed image becomes vivid.

  Matt black ink is used as black ink. Thereby, the gloss of a shadow part can be suppressed.

  Use wide color gamut ink. Thereby, a color reproduction area can be expanded.

  The flow of the printed material manufacturing method of this embodiment is shown in the flowchart of FIG. The flowchart of FIG. 13 embodies the process of step S3 of the flowchart of FIG. 2 in the present embodiment. In the present embodiment, the storage unit 15 of the image processing apparatus 10 further stores image data related to the frame-shaped pattern, and prints the frame-shaped pattern using this image data.

  First, the image subjected to the image processing in step S2 of the flowchart of FIG. 2 is reversed and printed on the back surface of the transparent film (S21).

  Next, white ink is printed over the entire image printed on the entire back surface of the transparent film (S22). Thereby, when the image printed on the back surface of the transparent film is viewed from the front surface side of the transparent film, the image can be prevented from being seen through.

  Next, white ink is printed in a frame shape in a print-scheduled area of the frame-like pattern on the surface of the transparent film (S23).

  Next, a frame-like pattern is printed on the scheduled print area of the frame-like pattern on the surface of the transparent film so as to overlap the white ink printed in step S23 (S24). Thereby, when the frame-like pattern printed on the surface of the transparent film is viewed from the surface side of the transparent film, the frame-like pattern can be prevented from being seen through.

  In addition, after printing a frame-shaped pattern in step S24, a varnish may be applied on the surface of the transparent film so as to overlap the frame-shaped pattern. Thereby, gloss can be given to a frame-like pattern.

2. Summary The printed matter manufacturing method of the present embodiment includes a step (S21) of printing an image obtained by the image processing method described in Embodiment 1 on one surface of the transparent film;
Printing a frame-like pattern on the peripheral edge of the other surface of the transparent film (S24).

  According to the present embodiment, when the image printed on the back surface of the transparent film is viewed from the front surface side of the transparent film, the surface of the transparent film reflects, so that it is as if the picture or the like is in the frame having the glass plate. It seems that the image of is put. In particular, since the image printed on the back surface of the transparent film is an image that is generated by the image processing method of Embodiment 1 and gives a three-dimensional effect to the viewer, it seems that a real picture is placed in the frame. appear.

  The technical idea of the third embodiment is applicable even when the image printed on the back surface of the transparent film is not an image obtained by the image processing method described in the first embodiment.

(Other embodiments)
In the third embodiment, the white ink is printed on the image printed on the back surface of the transparent film. However, instead of white ink, a reflective thin metal film may be provided. FIG. 14A is a view seen from the back side in a state where only the image is printed on the back side of the transparent film, and FIG. 14B is a view seen from the back side where a metal film is provided on the back side of the transparent film. FIG. The metal film can be formed by printing, foil stamping, vapor deposition, sticking a seal, laminating, or the like. In the case shown in FIG. 14B, a metal film is provided by stamping.

  By forming the metal film, light that has entered from the surface of the transparent film is reflected by the metal film. Therefore, the image itself printed on the back surface of the transparent film appears to shine. FIG. 15A is a diagram viewed from the front side with only the image printed on the back surface of the transparent film, and FIG. 15B is the front surface with the metal film provided on the back image of the transparent film. It is the figure seen from the side. By comparing FIG. 15A and FIG. 15B, it can be seen that when the metal film is provided on the back surface of the transparent film, the image itself appears to shine. In the case where a metal film is provided, the positional relationship between the light source and the viewer changes if the angle at which the printed material is viewed changes. Therefore, the amount of reflected light from the printed material changes, and the brightness of the printed material changes. However, a film having a high reflectance such as a mirror film for an automobile window glass is not preferable because the reflected light becomes strong and it becomes difficult to see the shadow in the image. In addition, the technical idea of providing a metal film on the image printed on the back surface of the transparent film is also applicable to a case in which a frame-like pattern is not provided on the surface of the transparent film.

  Further, instead of white ink, a reflective mount may be provided. In this case, a transparent film on which a pattern is printed (the pattern is transparent) may be attached to a reflective mount. Thereby, the light that has entered from the surface of the transparent film is reflected by the reflective mount, and the printed matter appears to shine.

  Further, instead of white ink, ink of a predetermined color may be printed. For example, if blue ink is printed, the blue color can be seen through the front side of the transparent film, and the front side image can appear bluish. Also, if red ink is printed, the red color can be seen through the front side of the transparent film, and the front side image can appear reddish. That is, the expression of the printed image can be changed.

  Further, after printing with the white ink, the ink of a predetermined color may be further superimposed and printed. As the predetermined color, for example, a color similar to the color of the subject to be emphasized included in the image is used. Thereby, it is possible to satisfactorily enhance the subject included in the printed image to be emphasized.

DESCRIPTION OF SYMBOLS 1 Printed product manufacturing apparatus 10 Image processing apparatus 11 Computer main body 12 Display 13 Operation part 14 CPU
DESCRIPTION OF SYMBOLS 15 Memory | storage part 16 Scanner interface 17 Printing interface 18 Display interface 19 Operation interface 20 Three-dimensional scanner 30 Printing apparatus

Claims (23)

An image processing apparatus that acquires an image of a three-dimensional object by a three-dimensional scanner capable of acquiring an image of a three-dimensional object that has been shaded by surface irregularities, and performs image processing on the acquired image,
Instruction means for instructing the stereoscopic scanner to acquire the image of the stereoscopic subject with an exposure amount at which an image having a brightness that is smaller by a first predetermined amount than when acquired with a predetermined exposure amount;
Image processing means for performing image processing on the acquired image,
The image processing means includes
First brightness increasing means for increasing the brightness of the acquired image by a second predetermined amount smaller than the first predetermined amount;
For the image whose brightness is increased by the first brightness increasing means, the median side is set so that the brightness on the median side of the brightness of the image is substantially equal to the brightness at the predetermined exposure time. Second brightness increasing means for increasing the brightness of the image by a large increase amount,
Image processing device. The image processing means includes
Color correction means for correcting the color of the subject in the image so as to approach the color generated in the subject by predetermined standard light with respect to the image whose brightness has been raised by the second brightness raising means,
The image processing apparatus according to claim 1. The image processing means includes
A contour emphasizing unit for emphasizing the contour of the subject included in the image;
The image processing apparatus according to claim 1. The image processing means includes
Image format conversion means for converting RGB format image data to CMYK format image data;
Brightness reduction means for reducing the lightness of the C and K colors converted by the image format conversion means by a third predetermined amount and a fourth predetermined amount;
The image processing apparatus according to any one of claims 1 to 3. The image processing apparatus according to any one of claims 1 to 4,
A printing device that prints an image processed by the image processing device,
Print production equipment. An image processing method for acquiring an image of a three-dimensional object by a three-dimensional scanner capable of acquiring an image of a three-dimensional object having a shadow due to unevenness on a surface, and performing image processing on the acquired image by a calculation unit,
The computing means is
An instruction step for instructing the stereoscopic scanner to acquire an image of the stereoscopic subject with an exposure amount at which an image having a brightness that is smaller by a first predetermined amount than when acquired with a predetermined exposure amount;
An image processing step for performing image processing on the acquired image,
The image processing step includes
A first brightness increase step for increasing the brightness of the acquired image by a second predetermined amount smaller than the first predetermined amount;
With respect to the image whose brightness has been increased in the first brightness increasing step, the median value side so that the brightness on the median side of the brightness of the image is substantially equal to the brightness at the predetermined exposure time. A second brightness increase step for increasing the brightness of the image by a large increase amount,
Image processing method. The image processing step includes
A color correction step of correcting the color of the subject in the image so as to approach the color generated in the subject by predetermined standard light with respect to the image whose brightness has been increased in the first and second brightness increase steps; Including,
The image processing method according to claim 6. The image processing step includes
A contour emphasizing step for emphasizing the contour of the subject included in the image;
The image processing method according to claim 6 or 7. The image processing step includes
An image format conversion step for converting image data in RGB format into image data in CMYK format;
A lightness reduction step of reducing the lightness of the C and K colors converted in the image format conversion step by a third predetermined amount and a fourth predetermined amount;
The image processing method according to claim 6. Steps included in the image processing method according to any one of claims 6 to 9,
A printing step of printing an image obtained by the image processing method.
Printed product manufacturing method. After printing the image, further comprising forming a metal coating layer on a surface of the image layer opposite to the transparent film;
The printed matter manufacturing method according to claim 10. After printing the image, the method further comprises printing a predetermined color of ink on a surface of the image layer opposite to the transparent film.
The printed matter manufacturing method according to claim 10. Further comprising printing a frame-like pattern on a peripheral portion of the other surface of the transparent film.
The printed matter manufacturing method according to any one of claims 10 to 12. After the step of printing the frame-shaped pattern, the method further includes the step of applying a varnish over the frame-shaped pattern.
The printed matter manufacturing method according to claim 13.   An image processing program for causing a computer to function as means for executing the image processing method according to any one of claims 6 to 9. A transparent film,
The image layer obtained by the image processing method according to any one of claims 6 to 9 printed on one surface of the transparent film;
A metal coating layer formed on the surface of the image layer opposite to the transparent film,
Printed matter. A transparent film,
The image layer obtained by the image processing method according to any one of claims 6 to 9 printed on one surface of the transparent film;
A layer of ink of a color according to the color characteristics of the image formed on the surface of the image layer opposite to the transparent film,
Printed matter. It further has a frame-like pattern layer printed on the peripheral portion of the other surface of the transparent film,
The printed matter according to claim 16 or claim 17. The pattern layer further has a varnish layer on the surface opposite to the transparent film,
The printed matter according to claim 18. A method for producing printed matter,
Printing the image on one side of the transparent film;
Forming a metal coating layer on a surface of the image layer opposite to the transparent film after printing the image,
Printed product manufacturing method. Further comprising printing a frame-like pattern on a peripheral portion of the other surface of the transparent film.
The printed matter manufacturing method according to claim 20. A transparent film,
An image layer printed on one side of the transparent film;
A metal coating layer formed on the surface of the image layer opposite to the transparent film,
Printed matter. It further has a frame-like pattern layer printed on the peripheral portion of the other surface of the transparent film,
The printed matter according to claim 22.