JP3139498U - 3D image printed matter - Google Patents

Abstract

Disclosed is a stereoscopic image printed matter that suppresses unintended changes in hue even when the viewing angle is shifted, and suppresses the generation of moire.
A three-dimensional image printed matter includes a lenticular lens in which a plurality of semi-cylindrical lenses are continuously arranged, and a halftone dot image printed matter 3 attached to the back of the lenticular lens. A halftone image printed matter is a pixel in which pixels arranged in a grid pattern are printed for each pixel. A halftone angle is applied to each color plate, and adjacent halftone dots are in contact with each other.
[Selection] Figure 3

Description

  The present invention relates to a three-dimensional image printed material using a lenticular lens, and more particularly to a halftone dot printing technique for a halftone image printed material which is arranged on the back surface of a lenticular lens and relates to density gradation expression.

  2. Description of the Related Art Conventionally, stereoscopic image printed matter using a lenticular lens has been used so as to make a symbolic image of a product or service appear three-dimensionally in order to make a poster or advertisement printed matter stand out for advertisement of goods or services. In such a three-dimensional printed matter, images taken from different angles are divided into strips and arranged along the semi-cylindrical lens on the back of the lenticular lens (for example, Patent Documents 1 to 3). 4). In recent years, research has been conducted to arrange 30 to 80 strip-like portrait images on one semi-cylindrical lens, and high-precision halftone dot printing processing has been demanded.

  Further, when printing a halftone image printed matter arranged on the back side of the lenticular lens, in order to eliminate moire, a halftone angle is applied to each CMYK color plate during halftone printing with the CMYK color plate. Are known (for example, Patent Documents 1, 2, and 4).

JP 2006-259645 A JP 2006-251608 A JP 2007-233105 A JP-A-9-61950

  However, in the conventional three-dimensional image printed matter, simply by applying a halftone dot angle for each color plate of CMYK, each halftone dot of CMYK does not have a common vertical axis, so the observation angle is shifted in the horizontal direction. And there is a problem that unintentional hue changes occur (reference patent document 1, paragraphs [0012] to [0013]). That is, as shown in FIG. 9, when the halftone image printed material 14 shown in FIG. 9A is arranged on the back surface of the lenticular lens 4 shown in FIG. 9B, the observation angle is shifted in the horizontal direction. As shown in FIG. 9C, in the divided strip-shaped image (vertically long image), the area enlarged by the semi-cylindrical lens 4b of the lenticular lens 4 gradually moves to the left and right. However, in some cases, an area having a group of unprinted halftone dots may be included, resulting in an unintended change in hue.

  Accordingly, an object of the present invention is to provide a stereoscopic image printed matter that suppresses unintended changes in hue even when the observation angle is shifted, and suppresses the generation of moire.

  The stereoscopic image printed material according to the present invention includes a lenticular lens in which a plurality of semicylindrical lenses are continuously arranged, and a back surface of the lenticular lens, and a plurality of elongated images corresponding to each semicylindrical lens. A halftone dot image printed matter that is continuously arranged, and the halftone dot image printed matter has a halftone dot angle for each color plate, and adjacent halftone dots are in contact with each other. .

  According to this three-dimensional image printed matter, since the halftone dot image printed product has a halftone dot angle for each color plate, the occurrence of moire can be suppressed even when the halftone image printed matter is observed through a lenticular lens, As adjacent halftone dots touch each other, the halftone dots are printed more densely, so there is no clustered area where the halftone dots are not printed in the continuous color in the image. Even if it is shifted, unintended changes in hue are suppressed.

  Moreover, in this three-dimensional image printed matter, it is more preferable that the halftone dots of the halftone dot printed matter are arranged in a lattice shape and the rectangular halftone dots are in contact with each other at the sides. With this configuration, the halftone dots become denser, an area where the halftone dots are not printed does not occur, and an unintended change in hue due to a shift in observation angle is also eliminated.

  According to the present invention, even if the observation angle is shifted, an unintended change in hue is suppressed, and the occurrence of moire can be suppressed.

  Hereinafter, preferred embodiments of a stereoscopic image printed material according to the present invention will be described with reference to the drawings.

<First Embodiment>
First, the stereoscopic image printed matter 5 according to the first embodiment will be described. FIG. 1 is a diagram illustrating a method for producing a halftone image printed material 3 used for a stereoscopic image printed material. As shown in FIG. 1A, the cameras 1a, 1b, 1c, and 1d of the stereo camera 1 are installed so as to be arranged horizontally, and the subject 2 is photographed. 1B shows images taken by the cameras 1a to 1d, B-1 in FIG. 1B is an image G1 taken by the camera 1a, and B-2 in FIG. The image G2 photographed by the camera 1b, B-3 in FIG. 1B is an image G3 photographed by the camera 1c, and B-4 in FIG. 1B is an image G4 photographed by the camera 1d. is there. These images G1 to G4 are divided vertically according to the number of semi-cylindrical lenses of the lenticular lens used.

  In FIG. 1B, images obtained by dividing the image G1 of B-1 are referred to as vertically long images s11, s12, s13,. Similarly, the images obtained by dividing the B-2 image G2 are the vertically long images s21, s22, s23,..., And the images obtained by dividing the B-3 image G3 are the vertically long images s31, s32, s33,. , B-4 images G4 are divided into vertically long images s41, s42, s43,.

Then, as shown in FIG. 1C, the vertically long images G1 to G4 are arranged one by one in the order of the images G1 to G4. That is, from left to right,
s11, s21, s31, s41, s12, s22, s32, s42, s13, s23, s33, s43, s14, s24, s34, s44,.
Is arranged.

On top of that,
s11, s21, s31, s41 are group Gr1,
s12, s22, s32, and s42 are group Gr2,
s13, s23, s33, and s43 are group Gr3,
s14, s24, s34, and s44 are group Gr4,
......
Then, each group Gr is arranged on the back surface of the semi-cylindrical lens of the lenticular lens, and is enlarged or reduced in the vertical and horizontal directions so as to be arranged over the entire back surface of the lenticular lens to form a halftone image printed matter 3.

  Next, the arrangement of the halftone dot image printed product 3 on the back surface 4a of the lenticular lens 4 will be described with reference to FIG. FIG. 2 is an exploded perspective view of the stereoscopic image printed matter 5. As shown in FIG. 2, the halftone image printed matter 3 is configured by connecting each group Gr, and the vertically long image of each group Gr is arranged so as to match the back surface of one semi-cylindrical lens 4 b in the lenticular lens 4. And pasted to the back surface 4a.

  Next, a method of performing halftone dot printing on the halftone image printed matter 3 will be described with reference to FIG. FIG. 3A is a diagram for explaining halftone dot printing of the halftone dot image printed material 3, and FIG. 3B is a half cylindrical lens 4 b of the lenticular lens 4 attached to the halftone dot image printed material 3. FIG. 3C is a partially enlarged view of the halftone dot image printed matter 3.

  Here, there will be described a case in which there are ten vertically long images (10 pixels) pasted on the back surface of one semi-cylindrical lens 4b, and 10 pixels are used for gradation expression. In this case, as shown in FIG. 3 (A), ten vertically long images are arranged in the horizontal direction, and for each vertically long image, 10 pixels in the vertical direction are used, and any one of the color plates of CMYK is used for that floor. Print in a grid according to the furniture. Adjacent pixels are in contact with each other by straight sides, and each pixel corresponds to a halftone dot for halftone printing.

  In the example shown in FIG. 3A, for such 10 × 10 pixels arranged in a lattice pattern, 1, 1, 2, 3, Prints 4, 6, 6, 7, 8, and 9 pixels with halftone angles. That is, when printing one pixel centering on the center line 6 having the halftone dot angle of the vertically long image, the pixel passing through the center line 6 is printed, and when printing two pixels, the center line 6 is printed. The pixel that passes through and any of the pixels adjacent to the top and bottom of the pixel are printed. In the case of printing three pixels, the pixels through which the center line 6 passes and the pixels adjacent to the top and bottom of the pixels (three pixels in total) are printed. In this manner, the necessary number of pixels are printed in the vertical direction around the center line 6 having the halftone dot angle of the vertically long image. If the pixels that need to be printed out of the 10 pixels that are arranged in the vertical direction reach the uppermost pixel and still need to be printed, the pixel from the lowest pixel is directed upward. Add pixels to print. If the pixels that need to be printed out of the 10 pixels arranged in the vertical direction reach the lowest pixel and still need to be printed, the pixel from the uppermost pixel is directed downward. Add pixels to print.

  When pixels are printed in this way, adjacent print pixels are in close contact with each other at their straight sides, and therefore, a continuous region where no pixels are printed does not occur while colors are continuous in an image. Therefore, even if the observation angle is shifted, an unintended change in hue does not occur. That is, when the observation angle is shifted in the horizontal direction, as shown in FIG. 3C, in the vertically long image, the region enlarged by the semicylindrical lens 4b of the lenticular lens 4 gradually moves to the left and right. However, since there is no grouped area in which pixels are not printed while colors are continuous in an image, unintentional hue changes do not occur. Moreover, when printing the halftone image printed matter 3, a color matching method can also be employ | adopted and the reproducibility of a color can be improved.

Second Embodiment
Next, the stereoscopic image printed matter in the second embodiment will be described with reference to FIG. The feature of the second embodiment is that the halftone image print 7 is printed using a plurality of color plates, and the other features are the same as those of the first embodiment.

  As shown in FIG. 4, halftone dots (pixels) are printed on the halftone image print 7 by CMYK color plates, and each halftone angle is C: 15 ° and M: 75 so that moire does not occur. °, Y: 0 °, K: 45 °, and the center line 6 of each color plate is set so that printing pixels are dispersed as widely as possible. For convenience, the pixels to be printed by each color plate are one pixel here. When a plurality of color plates overlap with respect to one same pixel, these colors are mixed.

  As shown in the second embodiment, when the halftone image printed matter 7 is printed using a plurality of color plates, since the halftone angle is printed, the generation of moire can be suppressed. In addition, since adjacent print pixels are in close contact with each other at the straight sides, there is no grouped area where no pixels are printed while the colors are continuous in the image. Therefore, even if the observation angle is shifted, an unintended change in hue does not occur. Furthermore, since the center line 6 of each color plate is set so that the printing pixels are dispersed as widely as possible, the ratio of the ground color portion and the mixed color portion of the halftone image printed matter 7 is suppressed. Can also be prevented. Further, as in the first embodiment, when printing the halftone image printed matter 7, a color matching method can be adopted, and the color reproducibility can be improved.

  In the second embodiment, the pixels to be printed on each color plate are one pixel for convenience. However, when printing a plurality of pixels on each color plate, the center line 6 is displayed as in the first embodiment. It is good to print so that it may extend in the up-down direction as a center.

<Third Embodiment>
Next, a stereoscopic image printed matter according to the third embodiment will be described with reference to FIG. A feature of the third embodiment is an example in which the halftone dot angle in the second embodiment is changed to an equivalent angle. Specifically, the halftone dot angle of M in the color plate is 75 ° in the second embodiment, whereas it is −15 ° in the third embodiment as shown in FIG. Others are the same as in the second embodiment.

  As shown in the third embodiment, when a halftone image print 8 is printed using a plurality of color plates, it can be changed to an equivalent halftone angle so as not to cause moire. That is, when the halftone dot angle exceeds 45 °, the halftone dot angle can be set to a negative angle obtained by reversely rotating the halftone dot angle by 90 °. In addition, since adjacent print pixels are in close contact with each other with straight sides, there is no unity region where pixels are not printed while colors are continuous in the image, and even if the observation angle is shifted Unintentional hue changes do not occur. Therefore, the same effect as the second embodiment can be obtained.

<Fourth embodiment>
Next, a stereoscopic image printed matter according to the fourth embodiment will be described with reference to FIG. In the first embodiment, the pixels are printed so as to extend in the vertical direction with the center line 6 as the center, whereas in the fourth embodiment, as shown in FIG. On the other hand, it is characterized in that the pixels are printed by the required number of pixels downward. If the pixels that need to be printed out of the 10 pixels arranged in the vertical direction reach the lowest pixel and still need to be printed, the pixel from the uppermost pixel is directed downward. Add pixels to print.

  When printing a halftone image printed matter 11 as in the fourth embodiment, if pixels are printed by the required number of pixels downward with respect to the reference line 9 having a halftone angle, the adjacent print pixels are Because they are in close contact with each other on the sides of the straight line, there is no unity area where pixels are not printed in the continuous color in the image, and an unintended change in hue occurs even if the observation angle is shifted. Absent. Therefore, the same effect as the first embodiment can be obtained.

  In the fourth embodiment, pixels are printed by the number of pixels necessary downward with respect to the reference line 9, but instead, the number of pixels necessary for upward with respect to the reference line 9 is printed. Only the pixels may be printed. Further, as in the second and third embodiments, a halftone image printed matter 11 may be printed by using a plurality of color plates and giving each color plate a halftone angle.

<Fifth Embodiment>
Next, a stereoscopic image printed matter according to the fifth embodiment will be described with reference to FIG. The fifth embodiment is characterized by the setting of the center line 6 having a halftone dot angle. Although the first embodiment has been described with respect to 10 × 10 pixels, in the fifth embodiment, setting of the center line 6 for a set of adjacent 10 × 10 pixels will be described.

  As shown in FIG. 7, in the halftone image printed matter 12, each center line 6 to which the halftone angle is given is set so as to continuously extend over adjacent 10 × 10 pixels. The printing on the pixels may be performed in the same manner as in the first to third embodiments on the basis of such a center line 6. In addition, the center line 6 may be used as a reference line shown in the fourth embodiment for printing on the pixels.

<Sixth Embodiment>
Next, a stereoscopic image printed matter according to the sixth embodiment will be described with reference to FIG. The sixth embodiment is characterized by the setting of the center line 6 for a set of adjacent 10 × 10 pixels, but is different from the setting of the fifth embodiment. That is, in the fifth embodiment, it is set so as to continuously extend over a plurality of adjacent 10 × 10 pixel sets, but in the sixth embodiment, in the halftone image printed material 13, 10 × 10 It is characterized in that the center line 6 is shifted for each pixel set.

  Similar to the first embodiment, printing of pixels is performed for the necessary pixels in the vertical direction around the center line 6. In contrast to this, as in the second and third embodiments, a plurality of color plates may be used to print pixels while giving a halftone angle to each color plate. Further, the center line 6 may be used as the reference line shown in the fourth embodiment to perform printing on the pixels.

  As described above, according to the first to sixth embodiments, since the halftone angle is applied in the pixel printing of the halftone image printed matter, the occurrence of moire can be suppressed. In addition, since adjacent print pixels are in close contact with each other at the straight sides, there is no clustered area where no pixels are printed while the colors are continuous in the image, so the viewing angle is shifted. However, no unintentional color change occurs. In addition, when printing a halftone dot printed matter, a color matching method can be adopted, and color reproducibility can be improved. Furthermore, since the pixels used for gradation expression of one vertically long image are only in the vertical direction, more vertically long images can be adopted than the AM screen, and a highly accurate stereoscopic image can be realized. it can.

  The present invention is not limited to the above embodiment.

  In each of the above-described embodiments, a halftone dot image print in which vertically long images corresponding to the number of image data are arranged in accordance with the shape of each semicylindrical lens is bonded. The arrangement is not limited to this as long as it corresponds to the printed matter. For example, assuming that the stereoscopic image printed material is observed from above the center of the stereoscopic image printed material, the corresponding range of the halftone image printed material may be arranged in a range that can be seen through the semicylindrical lens from the observation point. In this case, the width of the halftone image print corresponding to the semicylindrical lens changes depending on the position of the semicylindrical lens even if the pitch of the semicylindrical lens is constant.

  In the above embodiment, rectangular pixels are used as halftone dots. However, dot-like halftone dots may be used as long as adjacent halftone dots are closely arranged.

It is the figure which showed the preparation method of the halftone dot image printed material used for a three-dimensional image printed material, (A) is a figure which shows a mode that a to-be-photographed object is image | photographed with a stereo camera, (B) is image | photographed with each camera of a stereo camera, The figure which shows dividing | segmenting in order to produce a dot image printed matter, (C) is a figure which shows the halftone image printed matter produced by combining the divided | segmented vertically long image. It is a disassembled perspective view of a three-dimensional image printed matter. It is a figure explaining the three-dimensional image printed matter of 1st Embodiment, (A) is a figure which shows a halftone dot image printed matter, (B) is a figure which shows arrangement | positioning of the lenticular lens with respect to a halftone dot image printed matter, (C ) Is a diagram illustrating a state in which an area to be enlarged is shifted by the shift of the viewpoint. It is a figure explaining the stereo image printed matter of 2nd Embodiment, (A) is a figure which shows a halftone dot image printed matter, (B) is a figure which shows arrangement | positioning of the lenticular lens with respect to a halftone dot image printed matter. It is a figure explaining the stereo image printed matter of 3rd Embodiment, (A) is a figure which shows a halftone dot image printed matter, (B) is a figure which shows arrangement | positioning of the lenticular lens with respect to a halftone dot image printed matter. It is a figure explaining the three-dimensional image printed matter of 4th Embodiment, (A) is a figure which shows a halftone dot image printed matter, (B) is a figure which shows arrangement | positioning of the lenticular lens with respect to a halftone dot image printed matter. It is a figure explaining the stereo image printed matter of 5th Embodiment, (A) is a figure which shows a halftone dot image printed matter, (B) is a figure which shows arrangement | positioning of the lenticular lens with respect to a halftone dot image printed matter. It is a figure explaining the stereo image printed matter of 6th Embodiment, (A) is a figure which shows a halftone dot image printed matter, (B) is a figure which shows arrangement | positioning of the lenticular lens with respect to a halftone dot image printed matter. It is a figure explaining the conventional stereo image printed matter, (A) is a figure which shows a halftone dot image printed matter, (B) is a figure which shows arrangement | positioning of the lenticular lens with respect to a halftone dot image printed matter, (C) is a viewpoint. It is a figure which shows a mode that the area | region expanded by transfer of is moved.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Stereo camera, 2 ... Subject, 3, 7, 8, 11, 12, 13 ... Halftone image printed matter, 4 ... Lenticular lens, 4a ... Back surface, 4b ... Semi-cylindrical lens, 5 ... Three-dimensional image printed matter, 6 ... Center line, 9 ... reference line.

Claims (2)

A lenticular lens in which a plurality of semi-cylindrical lenses are continuously arranged;
A halftone dot image printed matter arranged on the back of the lenticular lens, and a plurality of elongated images corresponding to each semi-cylindrical lens is continuously arranged;
The halftone image printed matter is a three-dimensional image printed matter characterized in that a halftone angle is given for each color plate and adjacent halftone dots are in contact with each other.   The three-dimensional image printed matter according to claim 1, wherein the halftone dots of the halftone image printed matter are arranged in a lattice shape, and the rectangular halftone dots are in contact with each other at a side.