JP2003279893A - Stereoscopic picture forming method and device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stereoscopic picture forming method and a device therefor to easily form a stereoscopic picture having upper, lower, right and left parallax. <P>SOLUTION: A parallactic picture 3 is formed on a transparent sheet 4 and processed to be laminated by a transparent film 5. A lens 6 is formed in a hemispherical shape on the film 5. It is desirable to form the lens 6 by an ink jet system, and is preferable to set the diameter of the lens 6 ≤1.0 mm. The lens 6 is constituted of photosetting resin and is hardened by photoirradiation while holding the hemispherical shape by surface tension. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image forming method and apparatus for stereoscopically viewing a parallax image on a plane image plane.

[0002]

2. Description of the Related Art As a technique for forming a three-dimensional image, many photographic methods have been studied and put to practical use. However, the photographic method has not been able to easily form a three-dimensional image not only at home but also in an office, a printing place, or the like. Japanese Patent Application Laid-Open No. 7-281327 proposes a relatively simple method of forming an image by an inkjet method on the back surface of a sheet on which a kamaboko-shaped lenticular lens is formed, and Japanese Patent Application Laid-Open No. 2001-255606 further improves the method. In addition, a method of forming the lenticular lens itself by an inkjet method has been proposed. However, since either method uses the lenticular sheet, only an image limited to the lateral parallax can be obtained. Such an image is difficult to provide a good stereoscopic image because images with different depths are mixed in the same parallax, and an adverse effect called a "writing effect" such as a mixture of a planar image and a stereoscopic image is likely to appear.

In Japanese Patent Laid-Open No. 7-274089, a method called a holographic stereogram is improved, and dot-shaped holograms are arranged and recorded to obtain parallax in the vertical and horizontal directions. However, in order to form a hologram, it takes a very long time to obtain a hologram having a sufficiently large area, because it takes a proper time to form each dot.
Not practical.

[0004]

[Problems to be Solved by the Invention]
An object of the present invention is to provide a stereoscopic image forming method for easily forming a stereoscopic image having parallaxes of up, down, left and right.

[0005]

In order to solve the above-mentioned problems, the present invention according to claim 1 forms a minute parallax image on one side of a transparent sheet, and at the same time or afterwards, on the opposite surface of the transparent sheet. A three-dimensional image forming method is characterized in that a minute lens array or a grating having a diameter of 1.0 mm or less is formed. The present invention according to claim 2 is characterized in that the three-dimensional image forming method discharges droplets onto a sheet surface by using an inkjet method, maintains a hemispherical shape by surface tension of the droplets, and solidifies while maintaining the shape. The three-dimensional image forming method according to claim 1, wherein the lens is formed by using the method.
According to the present invention of claim 3, the three-dimensional image forming method comprises:
The lens forming position is corrected by detecting a position correction mark which is formed at the same time as the parallax image and which is formed for one element image sequence. 3D image forming method.
In the present invention according to claim 4, the three-dimensional image forming method is
The three-dimensional image forming method according to any one of claims 1 to 3, wherein a photo-curable resin is used as the resin forming the lens. The present invention according to claim 5 is the method for forming a stereoscopic image according to any one of claims 1 to 4, wherein the stereoscopic image forming method uses a cationically polymerizable resin as the photocurable resin. And

According to a sixth aspect of the present invention, in the three-dimensional image forming method, a parallax image is formed on a coloring sheet, and the parallax image surface of the coloring sheet and a transparent film are attached and bonded. The three-dimensional image forming method according to any one of claims 1 to 5. The present invention according to claim 7 is characterized in that the three-dimensional image forming method uses an electrophotographic method as a method for forming a parallax image, and the toner used has a volume average particle diameter of 9 μm or less. The three-dimensional image forming method according to any one of claims 1 to 6. The present invention according to claim 8 relates to claims 1 to 7.
A stereoscopic image forming apparatus that forms a stereoscopic image by using the stereoscopic image forming method described in any one of 1.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In the present invention, it is necessary to obtain parallax image data for recording a stereoscopic image well. FIG. 1 is a schematic diagram showing a procedure for obtaining image data. First,
As shown in FIG. 1A, a subject 1 to be reproduced is fixed on a photographing table, and a digital camera 2 held on an XZ stage is arranged in front of the subject 1. The digital camera 2 is moved in the X and Z directions at regular intervals, and one image is taken each time it is moved. These photographed images are rearranged on the computer in correspondence with the photographed positions, as shown in FIG. At this time, the size of the captured image and the number of pixels are reduced according to the size of the image reproduced and the size of the minute lens. Although it is preferable to handle all the obtained image data, it is necessary to thin out the image data to some extent due to restrictions such as the resolution of the printer used. Such an image processing method is performed using a conventionally known technique. Parallax image data composed of a group of minute element images processed in this way is output onto a recording sheet by an image forming apparatus such as a printer.

The forming method of the image forming apparatus for outputting the parallax image data is not particularly limited as long as a sufficient resolution can be obtained, and various known methods other than the electrophotographic method, for example, the ink jet method, the offset printing method, A stencil printing method, a heat-sensitive method, a thermal transfer method, a thermal sublimation method and the like can be used. Each of these image forming methods has an optimum sheet or sheet, and a recording sheet on which a minute image is formed may be selected according to the method used. For example, in the case of a thermal sublimation method or an inkjet method, a treatment such as forming an ink receiving layer on the surface of the recording paper may be performed. Further, in order to improve the quality of the obtained stereoscopic image, surface-coated paper having high surface light diffusion and high whiteness is preferable.

When an electrophotographic image forming apparatus is used, it is preferable that the toner particle size used is small. Specifically, the volume average particle diameter is 9 μm or less, and more preferably 6 μm or less. It is also preferable that the particle size distribution of the toner is narrow. Further, when the two-component developing method of the electrophotographic method is used, it is preferable that the carrier particle size is also small, specifically, 50 μm or less.

Further, as shown in FIG. 2, after the transparent sheet 4 and the transparent film 5 are superposed on the output parallax image 3 and laminated, a minute hemispherical lens 6 is formed on the transparent film 5. To form. By forming the lens 6 in a hemispherical shape as in the present invention, it becomes possible to form a stereoscopic image having parallax from the upper, lower, left and right sides. Particularly, by forming the lens 6 to have a diameter of 1.0 mm or less, it is possible to form a high-quality stereoscopic image. The lens formation is not particularly limited as long as the lens function can be maintained on the transparent substrate, and for example, lens formation by a grating using a stamper using a mold may be used. In the case of a grating, since the irregularities of the lens are not visible, the light diffusion effect on the surface of the transparent film 5 is reduced and it becomes easy to see. However, there are drawbacks such that the molding cost of the mold is expensive and it is difficult to finely adjust the position of the lens 6.

In the case of forming a lens by ink jet, various lenses can be formed simply by adjusting the surface tension difference between the resin film droplets ejected from the ink jet head and the transparent film 5. In addition, in the lens formation by inkjet, it is possible to form a minute lens array in which the observation viewing area of a desired stereoscopic image is adjusted. When a certain amount of resin is ejected from the inkjet head according to the pitch of the elemental image, the transparent film 5
The resin reaching the top forms a predetermined hemispherical shape due to the difference in surface tension with the transparent film 5. When the lens 6 is cured while holding the hemisphere, the lens 6 adhered to the film is obtained. The surface tension and the liquid viscosity of the resin to be discharged are adjusted so that the focal point of the lens 6 coincides with the image surface of the parallax image data 3 on the opposite side of the transparent film 5.

For the droplets ejected by the ink jet, a heat-melting resin or various curable resins can be used.
You may add the solvent which melt | dissolves resin as needed. A photo-curable resin is preferable, and in particular, a large number of ultraviolet-curable resins that cure with ultraviolet rays are commercially available, and there are many options depending on the application. For the curing of the photo-curable resin, light with necessary energy may be irradiated. As an irradiation method, light from a fluorescent tube or a lamp may be directly irradiated, or an optical fiber or the like may be used as a guide. However, when the resin ejection port of the inkjet head is irradiated with light, the head is clogged, so a light shielding plate or the like may be used so that light does not enter.

The photocurable resin is not particularly limited,
For example, a combination of a polymer and a photocrosslinking agent, a photocrosslinkable polymer, a combination of a monomer containing at least one photopolymerizable unsaturated bond in the molecule with a photopolymerization initiator and a polymer, a cationically polymerizable monomer or a polymer and a photopolymerizable material. A combination of cationic polymerization initiators may be mentioned. A ring-opening polymerizable monomer containing an epoxy group can be used in the resin composition. Examples of the ring-opening polymerizable monomer containing an epoxy group include bisphenol A diglycidyl ether, bisphenol F diglycidyl ether, bisphenol S diglycidyl ether, brominated bisphenol A diglycidyl ether, brominated bisphenol F diglycidyl ether, brominated Bisphenol S diglycidyl ether, epoxy novolac resin, hydrogenated bisphenol A
Diglycidyl ether, hydrogenated bisphenol F diglycidyl ether, hydrogenated bisphenol S diglycidyl ether, 3,4-epoxycyclohexylmethyl-3,4-
Epoxycyclohexanecarboxylate, 2- (3,
4-epoxycyclohexyl-5,5-spiro-3,4-
Epoxy) cyclohexane-meta-dioxane, bis (3,4-epoxycyclohexylmethyl) adipate, vinylcyclohexene oxide, 4-vinylepoxycyclohexane, bis (3,4-epoxy-6-methylcyclohexylmethyl) adipate, 3,4- Epoxy-6-methylcyclohexyl-3,4-epoxy-
6-methylcyclohexanecarboxylate, methylenebis (3,4-epoxycyclohexane), dicyclopentadiene diepoxide, ethylene glycol di (3,4-epoxycyclohexanecarboxylate), dioctyl epoxyhexahydrophthalate, epoxyhexahydrophthalic acid Di-2-ethylhexyl,
1,4-butanediol diglycidyl ether, 1,6-
Hexanediol diglycidyl ether, glycerin triglycidyl ether, trimethylolpropane triglycidyl ether, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, ethylene glycol, propylene glycol,
1 or 2 for aliphatic polyhydric alcohols such as glycerin
Polyglycidyl ethers of polyether polyols, diglycidyl esters of aliphatic long-chain dibasic acids and monoglycidyl ethers of higher aliphatic alcohols, phenols, cresols, butylphenols or these obtained by adding one or more alkylene oxides Polyether alcohol monoglycidyl ether obtained by adding alkylene oxide, glycidyl ester of higher fatty acid, epoxidized soybean oil, butyl epoxystearate, 3G poxystearin octyl, epoxidized linseed oil, epoxidized polybutadiene, etc. To be

Of these, bisphenol A diglycidyl ether, bisphenol F diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, hydrogenated bisphenol F diglycidyl ether, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane Carboxylate, bis (3,4-epoxycyclohexylmethyl) adipate, 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, glycerin triglycidyl ether, trimethylolpropane triglycidyl ether, polyethylene glycol di Glycidyl ether and polypropylene glycol diglycidyl ether are preferred.

Compounds containing these epoxy groups are 1
They may be used alone or in combination of two or more.
Based on 100% by weight of the (meth) acrylate polymer, preferably 5 to 300% by weight, more preferably 10 to 20%.
The content is 0% by weight, more preferably 10 to 100% by weight. If it exceeds 300% by weight, the properties of the cured product will not differ from those of ordinary epoxy cured products and the toughness will tend to be lost. If it is less than 10% by weight, the elastic modulus of the cured product will tend to be low.

Commercially available products of these epoxy compounds include:
UVR-6100, UVR-6105, UVR-611
0, UVR-6128, UVR-6200, UVR-6
216 (above Union Carbide), Celoxide 2021, Celoxide 2021P, Celoxide 20
81, Celoxide 2083, Celoxide 2085,
Celoxide 2000, Celoxide 3000, Glycidole, AOEX24, Cyclomer A200, Cyclomarmer M100, Eporide GT-300, Epolide GT-301, Epolide GT-302, Epolide GT-400, Epolide 401, Epolide 403.
(The above is Daicel Chemical Industries, Ltd.), Epicoat 82
8, Epicoat 812, Epicoat 1031, Epicoat 872, Epicoat CT508, and the like.

The ring-opening polymerizable monomer containing an epoxy group can be used as a solvent in producing a (meth) acrylate polymer as described above, and when it is used as a solvent, it is used as it is in the resin composition. It can be used as a component. In this case, the ring-opening polymerizable monomer containing an epoxy group is preferably contained in the entire composition in an amount of 10 to 90% by weight, more preferably 20 to 80% by weight.

As the photocationic polymerization initiator, various kinds can be used. Preferred examples of these initiators include diaryliodonium salts and triarylsulfonium salts. In particular, it is effective to use an aromatic onium salt as a cationic polymerization initiator, and among them, an aryldiazonium salt, a diaryliodonium salt, a triarylsulfonium salt, a triarylselenonium salt, a dialkylphenacylsulfonium salt, a triaryls. A ruphonoxonium salt, an aryloxydiarylsulfonoxonium salt, a dialkylphenacylsulfonononium salt and the like can be mentioned. The anionic species of these salts are non-nucleophilic chemical species such as tetrafluoroborate, hexafluorophosphate, hexafluoroarsenic and hexafluoroantimonate. Further, an iron / arene complex can also be used, and specific examples thereof include ferrocenylm hexafluorophosphate.

Commercially available products of these cationic photopolymerization initiators include UVI-6950, UVI-6970, UVI-
6974, UVI-6990 (above, Union Carbide Co., Ltd.), ADEKA OPTOMER SP-150, SP-15
1, SP-170, SP-171 (all manufactured by Asahi Denka Kogyo Co., Ltd.), Irgacure261 (all manufactured by Ciba Geigy), CI-2481, CI-2624, CI-2.
639, CI-2064 (all manufactured by Nippon Soda Co., Ltd.), CD-1010, CD-1011, CD-101.
2 (above, manufactured by Sartomer), DTS-102, DTS
-103, NAT-103, NDS-103, TPS-
103, MDS-103, MPI-103, BBI-1
03 (above, manufactured by Midori Kagaku Co., Ltd.) and the like. Among these commercial products, UVI-6970, U
VI-6974, ADEKA OPTOMER SP-170, SP
-171, CD-1022, MPI-103 and the like are particularly preferable.

These photo-cationic polymerization initiators may be used either individually or in combination of two or more, and are used in an amount of 0.1 to 10% by weight, particularly 0.2 to 5% by weight, and further 0.3 It is preferable to add 3 to 3% by weight. 0.1% by weight
If it is less than 10% by weight, the curability tends to be deteriorated and sufficient mechanical strength cannot be obtained. Photosensitizers such as thioxanthone and its derivatives, anthraquinone and its derivatives, anthracene and its derivatives, perylene and its derivatives, benzophenone and benzoin isopropyl ether can also be used in combination with these photocationic polymerization initiators.

In addition to the above components, a radically polymerizable vinyl monomer may be added. As the monofunctional vinyl monomer, one kind or two or more kinds of the monomers exemplified as those that can be used when synthesizing the (meth) acrylate polymer component can be used. Polyfunctional monomers can also be added if desired. Examples of polyfunctional monomers include trimethylolpropane tri (meth)
Acrylate, pentaerythritol tri (meth) acrylate, ethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate,
1,4-butanediol di (meth) acrylate, 1,6
-Hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, trimethylolpropane trioxyethyl (meth) acrylate, tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate, tris (2-hydroxyethyl) Of isocyanurate di (meth) acrylate, tricyclodecane dimethanol di (meth) acrylate, bisphenol A ethylene oxide or propylene oxide adduct diol di (meth) acrylate, hydrogenated bisphenol A ethylene oxide or propylene oxide Di (meth) acrylate of adduct diol, epoxy (meth) acrylate obtained by adding (meth) acrylate to diglycidyl ether of bisphenol A, triethyl Such as glycol divinyl ether.

Commercial products include, for example, Uupimar U
V SA1002, SA2007 (above, Mitsubishi Chemical); Viscoat 700 (Osaka Organic Chemical); KAYA
RADR-604, DPCA-20, -30, -60,
-120, HX-620, D-310, D-330 (all manufactured by Nippon Kayaku); Aronix M-210, M-21
5, M-315, M-325 (above, manufactured by Toagosei)
And so on. These monofunctional monomers and polyfunctional monomers are preferably used in the composition in an amount of 0 to 50% by weight.

When the above vinyl polymerizable monomer is added to the resin composition, it is preferable to add a photoradical polymerization initiator. Examples of such a polymerization initiator include (meth)
The same compounds as those exemplified in the synthesis of the acrylate polymer can be used. These polymerization initiators are added to the composition in an amount of 0.1
-10% by weight, especially 0.2-5% by weight, and further 0.3-
It is preferable to add 3% by weight. If it is less than 0.1% by weight, curability tends to be low and sufficient mechanical strength cannot be obtained, and if it exceeds 10% by weight, curing failure may occur when the film thickness is large, which is not preferable.

Although the photo-curable resin is mentioned above, among many ultraviolet-curable resins, the cationically polymerizable resin is more preferable. The radical polymerizable resin or the like is easily cured by heat other than light, and the cationic polymerizable resin is superior in storage stability.

The photocurable resin may also include various other additives such as an antioxidant, a colorant, an ultraviolet absorber, a light stabilizer, a silane coupling agent, a thermal polymerization inhibitor, a leveling agent, a surfactant, and the like. A storage stabilizer, a plasticizer, a lubricant, a solvent, a filler, an antiaging agent, a wettability improver, a coating surface improver and the like can be added if necessary. Here, as the antioxidant, for example, Irganox 1010, 103
5, 1076, 1222 (above, made by Ciba Geigy), A
Nigen P, 3C, FR, GA-80 (manufactured by Sumitomo Chemical Co., Ltd.) and the like. Examples of the ultraviolet absorber include Tinuvin P, 234, 320, 326, 32.
7, 328, 329, 213 (above, manufactured by Ciba Geigy), Seesorb 102, 103, 501, 20
2, 712, 704 (above, manufactured by Cypro Kasei) and the like. Examples of the light stabilizer include Tinuvin 2
92, 144, 622LD (above, made by Ciba Geigy),
Sanol LS770 (manufactured by Sankyo), SumisorbTM
-061 (manufactured by Sumitomo Chemical Co., Ltd.) and the like. As the silane coupling agent, for example, γ-aminopropyltriethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, and as commercially available products, SH6062, 6030 (above, manufactured by Toray Silicone), KBE903 , 603, 403
(Above, manufactured by Shin-Etsu Chemical) and the like. There is no problem if these additives disappear from the resin after curing or are transparent.

Further, when the image is output by the printer, it is preferable to print the position correction mark for each row of the element image row. Thereby, the formation position of the lens 6 with respect to the parallax image 3 is corrected, and the formation position of the lens 6 can be automatically determined. A position correction mark detector is added to the inkjet apparatus, and the paper feed is stopped when the position correction mark is detected during lens formation. It suffices to adjust the position of the detector and the position of the position correction marks so that when the apparatus detects the position correction marks and stops the sheet, the inkjet head corresponds exactly to the image row.

Alternatively, the parallax image 3 may be directly formed on the coloring sheet, and the transparent film 5 may be stuck and adhered to the surface on which the parallax image 3 is formed.

[0028]

The present invention will be described in more detail with reference to the following examples. However, the present invention is not limited to the following examples. (Example 1) A subject was photographed according to the procedure of FIG. 1, and the obtained image was rearranged on a computer so as to correspond to the photographed position. Image processing is performed using a conventionally known technique, and 360 sheets vertically and 2 horizontally at a pitch of 0.5 mm with respect to an A5 size paper.
Eighty images were arranged. The image data consisting of the obtained minute element image group is used as AFICIO800 manufactured by Ricoh Co., Ltd.
0 was used to output on white art paper. For the output image, a transparent sheet 4 made of polyethylene having a thickness of 0.8 mm and a transparent film 5 made of polyethylene,
Lamination processing was performed by stacking as shown in FIG. 0.6mm diameter on transparent film 5 by inkjet method
The minute lens 6 of No. 6 was formed on the entire image. An ultraviolet curable resin was quantitatively discharged from the inkjet head in accordance with the pitch of the elemental image to form a hemispherical shape, which was then cured by irradiation with ultraviolet light. When the obtained stereoscopic image was placed on a flat plate and observed from the lens side, the photographed subject could be observed as a good stereoscopic image in the back of the sheet.

(Example 2) When an image was output by the printer in Example 1, a position correction mark was printed for each line of the element image line. A position correction mark detector was added to the inkjet device, and the paper feed was stopped when the mark was detected. The position of the detector and the arrangement of the marks were adjusted so that when the inkjet device detected the marks and stopped the paper, the inkjet heads corresponded exactly to the columns of the elemental images. By using such an inkjet device, a lens corresponding to an image was formed in the same manner as in Example 1. The place where the lens is formed was automatically determined. When the obtained stereoscopic image was placed on a flat plate and observed from the lens side, the photographed subject could be observed as a good stereoscopic image in the back of the sheet.

(Example 3) Image output was performed on a coloring sheet, and a transparent film made of polyethylene was attached to the image surface of the coloring sheet. Then, the same inkjet device as in Example 2 was used to form lenses on the transparent film. In the obtained three-dimensional image, the photographed subject could be observed as a good three-dimensional image behind the colored sheet.

[0031]

As described above, according to the present invention,
A stereoscopic image forming method and apparatus capable of easily forming a high-quality stereoscopic image having parallaxes of up, down, left, and right by forming microscopic hemispherical lenses on a parallax image composed of a group of minute elemental images. Can be provided.

[Brief description of drawings]

FIG. 1 is a diagram showing a procedure for obtaining image data,
FIG. 6A is a schematic view showing a subject image pickup, FIG. 6B is an image reconstruction, and FIG.

FIG. 2 is a sectional view showing a configuration of a stereoscopic image obtained by the present invention.

[Explanation of symbols]

1 subject 2 digital camera 3 parallax image 4 transparent sheet 5 transparent film 6 lenses

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hideki Sugiura             1-3-3 Nakamagome, Ota-ku, Tokyo Stocks             Company Rico (72) Inventor Minoru Masuda             1-3-3 Nakamagome, Ota-ku, Tokyo Stocks             Company Rico (72) Inventor Tomomi Tamura             1-3-3 Nakamagome, Ota-ku, Tokyo Stocks             Company Rico F term (reference) 2H059 AB02

Claims (8)

[Claims] 1. A minute parallax image is formed on one side of a transparent sheet, and at the same time or afterward, a diameter of 1.
A three-dimensional image forming method, which comprises forming a lens including a minute lens array of 0 mm or less or a grating. 2. The three-dimensional image forming method uses an inkjet method to eject droplets onto a sheet surface, hold a hemispherical shape by the surface tension of the droplets, and maintain the shape to solidify to form a lens. The three-dimensional image forming method according to claim 1, wherein. 3. The stereoscopic image forming method corrects the formation position of a lens by detecting a position correction mark which is formed at the same time as a parallax image and which is formed for one element image sequence. The three-dimensional image forming method according to claim 1 or 2, characterized in that. 4. The three-dimensional image forming method according to claim 1, wherein the three-dimensional image forming method uses a photocurable resin as a resin forming a lens. 5. The stereoscopic image forming method according to claim 1, wherein a cationically polymerizable resin is used as the photocurable resin in the stereoscopic image forming method. 6. The three-dimensional image forming method according to claim 1, wherein the parallax image is formed on the coloring sheet, and the parallax image surface of the coloring sheet and the transparent film are bonded to each other. A method for forming a stereoscopic image according to Crab. 7. The three-dimensional image forming method uses an electrophotographic method as a method of forming a parallax image, and the toner used has a volume average particle diameter of 9 μm or less. 7. The stereoscopic image forming method according to any one of 6 above. 8. A three-dimensional image forming apparatus for forming a three-dimensional image using the three-dimensional image forming method according to claim 1.