JP6926715B2 - 3D modeling data generation device, 3D modeling device, and 3D modeling data generation program - Google Patents

Description

The present invention relates to a three-dimensional modeling data generation device, a three-dimensional modeling device, and a three-dimensional modeling data generation program.

Patent Document 1 describes a method for manufacturing a three-dimensional model in which unit layers discharged with colored ink are laminated, based on the three-dimensional shape data of the three-dimensional model. It is characterized in that color correction is performed according to an acute angle θ formed by the surface direction A of the unit layer and the surface direction B of the three-dimensional modeled object at a plurality of parts on the surface of the three-dimensional modeled object. A method for manufacturing a three-dimensional model is disclosed.

Patent Document 2 describes a method of printing a three-dimensional article having a colored surface, in which a step of receiving data representing the coloring of the surface and data representing the coloring of the surface of the article are converted into voxel data. Steps and methods including are disclosed.

Patent Document 3 includes a forming portion for laminating layers formed of colored ink or transparent ink, and the forming portion includes a superimposing region between layers formed by the same ink other than the superimposing region formed by the ink. Disclosed is a three-dimensional object modeling apparatus characterized in that the ink ejection volume per unit volume is smaller than that of a region in which the layers formed by the ink are not overlapped with each other.

JP-A-2015-98091 U.S. Patent Application Publication No. 2015/0258770 JP-A-2015-221515

When creating 3D shape data with color information added to the surface of the 3D shape, 3D color information with thickness is generated toward the inside of the 3D shape, and the 3D shape is stacked in the stacking direction. By making the color distribution different between the upper and lower layers when sliced, it is necessary to suppress the variation in color development in the thickness direction of the three-dimensional shape.

However, when the three-dimensional shape is a complicated shape, the color distribution of the thick part in the slice image sliced in the stacking direction and the process of increasing the thickness toward the inside of the three-dimensional shape are different between the upper and lower layers. It is difficult to generate a three-dimensional color distribution as described above.

The present invention has a three-dimensional shape having a complicated shape as compared with the case where the discharge pattern of the modeling material is different depending on the angle formed between the surface direction of the layer and the surface direction of the three-dimensional shape for each layer to be laminated. A 3D shape data generator, a 3D modeling device, and a 3D modeling data generation program that can easily obtain a 3D shape that suppresses variations in color development when observed from various angles, even if it is a shape. The purpose is to provide.

In order to achieve the above object, the invention of the three-dimensional shape data generation device according to claim 1 develops the color information specified on the surface of the three-dimensional shape represented by the three-dimensional shape data in two dimensions. A two-dimensional development image generation unit that generates a two-dimensional development image with a thickness, and a halftone processing unit that three-dimensionally halftones the two-dimensional development image so that the upper and lower layers have different color distributions. , A three-dimensional modeling data generation unit that generates three-dimensional modeling data by pasting a three-dimensional color distribution image halftone-processed by the halftone processing unit on the three-dimensional shape, and a plurality of the three-dimensional shapes. Regarding the overlapping region generated when the color distribution image is pasted on the plurality of surfaces having an angle formed by the surfaces of less than 180 degrees, the color distribution image pasted on the overlapping region of each of the plurality of surfaces is It includes a compositing unit that synthesizes the color information to be represented .

In the invention according to claim 2, the color distribution information of the two-dimensional developed image includes color distribution information of a plurality of layers having different color distributions in the upper and lower layers.

According to the third aspect of the present invention, when the color distribution information generation unit generates color distribution information of the two-dimensional development image so that the color distribution is different from the top to the bottom of the two-dimensional development image. Halftone processing is performed using the color information so that different patterns are obtained in the continuous upper and lower layers.

In the invention according to claim 4 , the synthesis unit sets a representative value of the color information of each of the plurality of surfaces in the overlapping region as the color information of the overlapping region.

In the invention according to claim 5 , the synthesis unit calculates the representative value so that the closer the distance from the plurality of surfaces is to the overlapping region, the greater the proportion of the color information on the surfaces having a shorter distance. do.

In the invention according to claim 6 , the synthesis unit sets the color information of each of the plurality of surfaces in each of the divided regions obtained by dividing the overlapping region by a bisector of an angle formed by the plurality of surfaces. do.

The invention according to claim 7 is a two-dimensional developed image that generates a two-dimensional developed image in which the color information specified on the surface of the three-dimensional shape represented by the three-dimensional shape data is expanded two-dimensionally to give a thickness. The generation unit, the color distribution information generation unit that generates the color distribution information of the two-dimensional development image so that the color distribution is different from the top to the bottom of the two-dimensional development image having the thickness, and the color distribution. A three-dimensional modeling data generation unit that generates three-dimensional modeling data by pasting a color distribution image represented by the color distribution information of the two-dimensional development image generated by the information generation unit on the three-dimensional shape, and the above-mentioned a complementing part that complements the color information represented by the color distribution picture in the gap region generated when the angle between the plurality of surfaces of the three-dimensional shape is affixed the color distribution picture to the plurality of surfaces in excess of 180 degrees, the Be prepared.

In the invention according to claim 8 , the complementary portion interpolates the color information of the gap region from the color information on the gap region side of the color distribution image attached to the plurality of surfaces, thereby forming the gap region. Complements the color information.

The invention according to claim 9 is to attach a color distribution image attached to the plurality of surfaces to a plurality of pseudo regions provided on the outside of the plurality of surfaces in a pseudo manner, and to attach the color distribution image to the plurality of pseudo regions. Regarding the overlapping region where the color distribution images overlap, a compositing unit for synthesizing the color information represented by the color distribution image attached to each of the plurality of pseudo regions is provided, and the complementary portion is provided in the overlapping region. The set color information is complemented in the gap region.

The three-dimensional modeling apparatus of the invention according to claim 10 is the three-dimensional modeling generated by a discharge head that discharges a modeling material and the three-dimensional modeling data generation device according to any one of claims 1 to 9. A three-dimensional shape is formed by using an acquisition unit for acquiring data, a generation unit for generating slice data obtained by slicing the three-dimensional modeling data on a plurality of surfaces, and slice data generated by the generation unit. Is provided with a control unit for controlling the discharge head.

The three-dimensional modeling data generation program of the invention according to claim 11 is for causing the computer to function as each part of the three-dimensional modeling data generation device according to any one of claims 1 to 9. It is a generation program of.

According to the first, tenth , and eleventh aspects of the invention, the ejection pattern of the modeling material is formed according to the angle formed between the surface direction of the layers and the surface direction of the three-dimensional shape for each layer to be laminated. It has the effect that even if the three-dimensional shape has a complicated shape, a three-dimensional shape with less variation in color development can be easily obtained when observed from various angles, as compared with the case where the three-dimensional shapes are different. ..

According to the invention of claim 2, it becomes easier to generate different color distribution information in the upper and lower layers as compared with the case where the color distribution information of the two-dimensional developed image is not divided into the color distribution information of a plurality of layers. , Has the effect.

According to the third aspect of the present invention, as compared with the case where the color distribution information of the two-dimensional developed image is generated by a process other than the halftone process, the color distribution information having a different pattern in the continuous upper and lower layers can be easily obtained. It has the effect of being able to be generated.

According to the fourth aspect of the invention, the color information of the overlapping region is obtained as compared with the case where the color information other than the representative value of the color information of each of the plurality of surfaces in the overlapping region is set as the color information of the overlapping region. It has the effect that it can be set appropriately.

According to the fifth aspect of the invention, it is possible to appropriately set the color information of the overlapping area as compared with the case of setting the color information of the overlapping area regardless of the distance from the plurality of surfaces of the overlapping area. It has the effect of being able to do it.

According to the invention of claim 6 , it is simpler than the case where the color information is set in the overlapping area by synthesizing the color information represented by the color distribution image pasted on each overlapping area of the plurality of surfaces. It has the effect that color information can be set in the overlapping area by various processes.

According to the invention of claim 7 , the color information is not complemented in the gap region generated when the color distribution image is pasted on the plurality of surfaces having an angle formed by the plurality of surfaces of the three-dimensional shape exceeding 180 degrees. In comparison, it has the effect of suppressing variations in color development.

According to the eighth aspect of the present invention, there is a case where the color information is set in the gap region without interposing the color information in the gap region from the color information on the gap region side of the color distribution image pasted on the plurality of surfaces. In comparison, it has the effect that color information can be appropriately set in the gap region.

According to the invention of claim 9 , it has an effect that the color information to be set in the gap region can be collectively set.

It is a figure which shows the structural example of the 3D modeling data generation apparatus. It is a flowchart which shows an example of the flow of the 3D shape data generation processing. It is a perspective view which shows an example of a three-dimensional shape. It is a top view of the two-dimensional development image. It is a partial perspective view of a two-dimensional development image. It is a side view of a part of a two-dimensional developed image. It is a figure for demonstrating the case where the color information is set in the overlap region which occurs when the angle formed by a plurality of surfaces is less than 180 degrees. It is a figure for demonstrating the modification in the case of setting the color information in the overlap area which occurs when the angle formed by a plurality of surfaces is less than 180 degrees. It is a figure for demonstrating the case where the color information is set in the gap area which occurs when the angle formed by a plurality of surfaces exceeds 180 degrees. It is a figure for demonstrating the modification in the case of setting the color information in the gap region which occurs when the angle formed by a plurality of surfaces exceeds 180 degrees. It is a figure which shows the structural example of the 3D modeling apparatus. It is a perspective view of the three-dimensional shape which concerns on another example. It is a figure which shows the image which developed the three-dimensional shape which concerns on another example by UV. It is a figure which shows the cross section of the three-dimensional shape which concerns on another example. It is a figure which shows the cross section of the three-dimensional shape which concerns on another example. It is a figure which shows the cross section of the three-dimensional shape which concerns on another example. It is a figure which shows the slice image which sliced the three-dimensional shape which concerns on another example. It is a figure which shows the slice image which sliced the three-dimensional shape which concerns on another example. It is a perspective view of the three-dimensional shape which concerns on another example. It is a figure which shows the image which developed the three-dimensional shape which concerns on another example by UV. It is a figure which shows the cross section of the three-dimensional shape which concerns on another example.

Hereinafter, examples of embodiments for carrying out the present invention will be described in detail with reference to the drawings.

First, with reference to FIG. 1, the configuration of the three-dimensional shape data generation device 10 according to the present embodiment will be described.

The generation device 10 is composed of, for example, a personal computer or the like, and includes a controller 12. The controller 12 includes a CPU (Central Processing Unit) 12A, a ROM (Read Only Memory) 12B, a RAM (Random Access Memory) 12C, a non-volatile memory 12D, and an input / output interface (I / O) 12E. The CPU 12A, ROM 12B, RAM 12C, non-volatile memory 12D, and I / O 12E are each connected via the bus 12F.

Further, the operation unit 14, the display unit 16, the communication unit 18, and the storage unit 20 are connected to the I / O 12E. The CPU 12A is an example of a two-dimensional development image generation unit, a halftone processing unit, a three-dimensional modeling data generation unit, a composition unit, and a complement unit.

The operation unit 14 includes input devices such as a mouse, a keyboard, and a touch panel that receive instructions from the user of the generation device 10.

The display unit 16 includes display devices such as a liquid crystal display and an organic EL (Electro Luminescence) display.

The communication unit 18 is connected to a communication line such as the Internet and a LAN (Local Area Network), and has an interface for performing data communication with an external device such as a personal computer connected to the communication line.

The storage unit 20 is composed of a non-volatile storage device such as a hard disk, and stores a three-dimensional modeling data generation program, three-dimensional shape data, and the like, which will be described later. The CPU 12A reads and executes a three-dimensional modeling data generation program stored in the storage unit 20.

Next, the operation of the generation device 10 according to the present embodiment will be described with reference to FIG. When the CPU 12A reads and executes the three-dimensional modeling data generation program, the generation process shown in FIG. 2 is executed. The generation process shown in FIG. 2 is executed, for example, when the execution of the generation program is instructed by the user's operation.

In step S100, the three-dimensional shape data is read from the storage unit 20.

In step S102, the color information specified in the voxels on the surface of the three-dimensional shape represented by the three-dimensional shape data is expanded two-dimensionally to generate a two-dimensional expanded image having a thickness.

Here, as an example, a case where the three-dimensional shape represented by the three-dimensional modeling data is the three-dimensional shape 40 of the dice as shown in FIG. 3 will be described. As shown in FIG. 3, in the three-dimensional shape 40, the dice roll portion is colored black.

In this case, as shown in FIG. 4, the three-dimensional shape 40 is developed on a two-dimensional plane. In the example of FIG. 4, the case where it is developed into a six-view drawing is shown. Then, as shown in FIG. 5, a two-dimensional developed image 42 having a predetermined thickness d is generated. At this time, as shown in FIG. 6, taking the surface 42-1 where the dice roll is “1” as an example, the portion of the colored dice roll 44-1 is extended to the thickness d. As described above, the two-dimensional developed image 42 is simply an image in which the image developed on the two-dimensional plane of FIG. 4 is thickened.

In step S104, the color distribution information (three-dimensional color distribution information) of the two-dimensional developed image 42 is generated so that the upper and lower layers of the two-dimensional developed image 42 have different color distributions in the thickness direction. That is, the thick two-dimensional developed image 42 has color distribution information of a plurality of layers having different color distributions in the upper and lower layers.

Hereinafter, a specific method for generating color distribution information will be described. For example, the top (the outermost layer in a three-dimensional shape) is 100% transparent, and the bottom (the inner layer in a three-dimensional shape) is a specified (opaque) color with 0% transparency. Color distribution information may be generated so that the color distribution gradually changes in transparency from the top to the bottom so as to be information.

In addition, color distribution information is generated so that the color distribution gradually increases in saturation or lightness from the top to the bottom, or the color distribution decreases in saturation or lightness. You may.

Further, the color distribution information generation method may be changed depending on the color or shape, or different generation methods may be combined.

Further, the user may specify a method for generating three-dimensional color distribution information, a color change pattern may be specified, or the user may directly create the color distribution information.

Further, halftone processing may be performed using the color information specified on the surface of the three-dimensional shape data. When performing halftone processing, the specified color is reproduced only in a limited area inside the 3D shape in the 2D expanded image in which the color information specified on the 3D shape data surface is expanded in 2D. It is not necessary to determine such a pixel arrangement, and it is possible to generate color distribution information of a three-dimensional pixel arrangement using the thickness direction and transparent pixels.

For the halftone processing, a known method such as a dither method or an error diffusion method is used. For example, when the dither method is used, halftone processing may be performed using a three-dimensional dither matrix. Further, when the error diffusion method is used, the pixels for diffusing the error may be set in the three-dimensional space and halftone processing may be performed. In any case, considering the condition that the pixel arrangement must be determined so as to fit within the complicated three-dimensional shape, the thickness is thicker than when the three-dimensional color distribution information is generated. Halftone processing can be performed quickly and efficiently by simplifying to a three-dimensional expanded image.

By three-dimensionally halftone processing the two-dimensional developed image 42 in this way, three-dimensional color distribution information in which the color distributions of the adjacent upper and lower layers are different in the thickness direction of the two-dimensional developed image 42 is generated.

In step S106, three-dimensional modeling data is generated by pasting a color distribution image represented by the three-dimensional color distribution information generated in step S104 on a three-dimensional shape. The color distribution image is pasted so that the outer surface of the color distribution image matches the surface of the three-dimensional shape. That is, the color distribution image is pasted from the outermost surface to the inside of the three-dimensional shape.

In step S108, the overlapping region generated when the color distribution image is pasted on the plurality of surfaces having an angle formed by the plurality of surfaces of the three-dimensional shape is less than 180 degrees is pasted on each overlapping region of the plurality of surfaces. The color information represented by the resulting color distribution image is combined.

Specifically, the representative value of the color information of each of the plurality of surfaces in the overlapping region is set as the color information of the overlapping region.

Here, as shown in FIG. 7, a case of a three-dimensional shape 50 having a plurality of faces having a plurality of faces formed by an angle of 90 degrees will be described. The arrow H in the figure indicates the direction of the surface. That is, the direction of the arrow H represents the outer direction of the three-dimensional shape 50, and the direction opposite to the arrow H represents the inner direction of the three-dimensional shape 50. The same applies to FIGS. 8 to 10. The three-dimensional shape 50 has a first surface 52-1 and a second surface 52-2, and the angle θ formed by the first surface 52 and the second surface 52-2 is 90 degrees. In such a three-dimensional shape 50, the color distribution image 54-1 pasted on the first surface 52-1 and the color distribution image 54-2 pasted on the second surface 52-2 overlap. An overlapping region 56 is created.

In this case, among the color information represented by the color distribution image 54-1 pasted on the first surface 52-1, the color information of the region corresponding to the overlapping region 56 and the color information pasted on the second surface 52-2. Of the color information represented by the color distribution image 54-2, the representative value of the color information of the region corresponding to the overlapping region 56 and the representative value are calculated and set as the color information of the overlapping region 56. Examples of representative values include, but are not limited to, the average value, the median value, and the like.

Further, the representative value is calculated so that the closer the distance from the first surface 52-1 or the second surface 52-2 is to the overlapping area 56, the larger the ratio of the color information of the surface having the shorter distance is. It may be. As a result, the change in color information becomes smooth.

Further, for example, as shown in FIG. 8, the overlapping regions 56 are divided by the bisector 58 at the angle formed by the first surface 52-1 and the second surface 52-2, and the divided regions 56-1, 56- Of 2, the color information in the divided region 56-1 of the color distribution image 54-1 is set in the divided region 56-1, and the color information in the divided region 56-2 of the color distribution image 54-2 is set in the divided region 56-2. Color information may be set.

In step S110, the color information represented by the color distribution image is complemented in the gap region generated when the color distribution image is attached to the plurality of surfaces having an angle formed by the plurality of surfaces of the three-dimensional shape exceeding 180 degrees.

Specifically, the color information of the gap region is interpolated from the color information on the gap region side of the color distribution image pasted on the plurality of surfaces.

Here, as shown in FIG. 9, a case of a three-dimensional shape 60 having a plurality of surfaces having an angle formed by the plurality of surfaces of 270 degrees will be described. The three-dimensional shape 60 has a first surface 62-1 and a second surface 62-2, and the angle θ formed by the first surface 62-1 and the second surface 62-2 is 270 degrees. .. In such a three-dimensional shape 60, between the color distribution image 64-1 attached to the first surface 62-1 and the color distribution image 64-2 attached to the second surface 62-2. A gap region 66 is created.

In this case, the color information of the region of the color distribution image 64-1 pasted on the first surface 62-1 near the gap region 66 and the color distribution image 64 pasted on the second surface 62-2. The color information of the gap region 66 is interpolated by using the color information of the region of -2 close to the gap region 66. At this time, the color information may be changed according to the distance from the end of the color distribution image 64-1 and the color distribution image 64-2 so that the color information of the gap region 66 changes smoothly.

Further, the color information may be set in the gap region 66 as follows. First, as shown in FIG. 10, in the pseudo regions 68-1 and 68-2 provided on the outside of the first surface 62-1 and the second surface 62-2, the color distribution images 64-1 and Paste 64-2. Then, for the overlapping region 70 in which the pseudo regions 68-1 and 68-2 overlap, the same processing as the processing in step S108 is performed, so that the colors attached to each of the pseudo regions 68-1 and 68-2 are performed. The information represented by the distribution images 64-1 and 64-2 is synthesized.

Here, the overlapping region 70 has the same figure as the gap region 66 when rotated 180 degrees in FIG. Therefore, the color information set in the overlapping area 70 is set in the gap area 66.

In step S112, the three-dimensional modeling data generated by performing the above processing is stored in the storage unit 20.

As described above, in the present embodiment, the color information specified on the surface of the three-dimensional shape is expanded two-dimensionally to generate a two-dimensional expanded image having a thickness so that the upper and lower layers have different color distributions. Two-dimensional development Image is three-dimensionally halftone processed. Then, the three-dimensional modeling data is generated by pasting the halftone-processed three-dimensional color distribution image on the three-dimensional shape.

If the color distribution is the same in the upper and lower layers, the colors may appear like streaks continuously in the height direction of the three-dimensional shape, resulting in variations in color development. On the other hand, in the present embodiment, since the two-dimensional developed image is three-dimensionally halftone processed so as to have different color distributions in the upper and lower layers as described above, the halftone processing is simplified. Therefore, even if the three-dimensional shape has a complicated shape, three-dimensional modeling data capable of obtaining a three-dimensional shape with suppressed variation in color development when observed from various angles can be easily generated.

Next, a three-dimensional modeling device that forms a three-dimensional shape using the three-dimensional modeling data generated by the three-dimensional modeling data generation device 10 will be described.

FIG. 11 shows the configuration of the three-dimensional modeling apparatus 100 according to the present embodiment. As shown in FIG. 11, the three-dimensional modeling apparatus 100 includes an acquisition unit 102, a generation unit 104, a discharge head 106, and a control unit 108.

The modeling method adopted by the three-dimensional modeling apparatus 100 includes, for example, a binder jet method for forming a three-dimensional shape by injecting a colored binder onto a powdered material and laminating it, and a liquefied colored material. An inkjet method or the like in which a modeling material is jetted and laminated to form a three-dimensional shape can be mentioned, but other modeling methods may also be used.

The acquisition unit 102 acquires the three-dimensional modeling data generated by the three-dimensional modeling data generation device 10.

The generation unit 104 generates slice data obtained by slicing the three-dimensional modeling data acquired by the acquisition unit 102 on a plurality of surfaces.

The control unit 108 forms a three-dimensional shape by controlling the discharge head that discharges the modeling material according to the slice data generated by the generation unit 104.

Here, the three-dimensional modeling data acquired by the acquisition unit 102 has already been subjected to three-dimensional halftone processing as described above. Therefore, it is not necessary to perform halftone processing in the three-dimensional modeling apparatus 100, and the processing load is reduced.

Although the present invention has been described above using each embodiment, the present invention is not limited to the scope described in each embodiment. Various changes or improvements can be made to each embodiment without departing from the gist of the present invention, and the modified or improved forms are also included in the technical scope of the present invention.

For example, the three-dimensional modeling data generation process shown in FIG. 2 may be realized by hardware such as an ASIC (Application Specific Integrated Circuit). In this case, the processing speed can be increased as compared with the case where it is realized by software.

Further, in each embodiment, the embodiment in which the three-dimensional modeling data generation program is installed in the ROM 12B has been described, but the present invention is not limited to this. The three-dimensional modeling data generation program according to the present embodiment may be provided in a form recorded on a computer-readable storage medium. For example, the three-dimensional shape data generation program according to the present invention is recorded on an optical disk such as a CD (Compact Disc) -ROM and a DVD (Digital Versatile Disc) -ROM, or a USB (Universal Serial Bus) memory and a memory card. It may be provided in the form of being recorded in a semiconductor memory such as. Further, the three-dimensional modeling data generation program according to the present embodiment may be acquired from an external device via a communication line connected to the communication unit 18.

Further, in the present embodiment, the three-dimensional shape having a simple shape as shown in FIG. 3 has been described as an example, but the present invention is also applied to a complicated three-dimensional shape. For example, the present invention also applies to a donut-shaped three-dimensional shape 80 as shown in FIG. When the three-dimensional shape 80 shown in FIG. 12 is developed by so-called UV, a two-dimensional developed image 82 as shown in FIG. 13 is generated.

Then, the two-dimensional developed image 82 is made thick, and the three-dimensional color distribution information of the two-dimensional developed image 82 is generated so that the upper and lower layers have different color distributions in the thickness direction of the two-dimensional developed image 82. , Attached to the three-dimensional shape 80.

In this case, for example, as shown in FIG. 14, in the cross section 84 parallel to the XZ plane, the color distribution information 86 is set from the outermost surface to the inside of the three-dimensional shape 80 as shown in FIG.

Further, as shown in FIG. 16, in the cross section 88 parallel to the XY plane, as shown in FIG. 17, the color distribution information 86 is set from the outermost surface to the inside of the three-dimensional shape 80. Then, as shown in FIG. 18, when a plurality of slice images 90 obtained by slicing the three-dimensional shape 80 on a plane parallel to the XY plane are generated, the color distribution information 86 set in each slice image 90 is the upper and lower layers. Will have different color distributions.

The present invention also applies to a three-dimensional shape 92 having the shape of a dolphin as shown in FIG. When the three-dimensional shape 92 shown in FIG. 19 is developed by so-called UV, a two-dimensional developed image 94 as shown in FIG. 20 is generated.

Then, the two-dimensional developed image 94 is made thick, and the three-dimensional color distribution information of the two-dimensional developed image 94 is generated so that the upper and lower layers have different color distributions in the thickness direction of the two-dimensional developed image 94. , Attached to the three-dimensional shape 92.

In this case, for example, as shown in FIG. 21, in the cross section 96 parallel to the XY plane, the color distribution information 98 is set from the outermost surface to the inside of the three-dimensional shape 92 as shown in FIG.

Conventionally, as shown in FIG. 18, after generating a plurality of slice images 90 obtained by slicing a three-dimensional shape in which color information is set only on the surface on a plane parallel to the XY plane, each slice image 90 has a surface. Color information is set by providing a thickness from to the inside. In this case, it is necessary to set the color information in the thickness portion so that the upper and lower layers have different color distributions. However, in the case of a complicated shape such as the three-dimensional shape 92 of a dolphin as shown in FIG. 19, since the shape of the thick portion differs between the upper and lower layers, the thick portion has a different color distribution between the upper and lower layers. It is difficult to set the color information.

On the other hand, in the present embodiment, the two-dimensional expanded image in which the three-dimensional shape is expanded two-dimensionally has a thickness so that the upper and lower layers in the thickness direction of the two-dimensional expanded image have different color distributions. After generating the three-dimensional color distribution information of the image, paste it into the three-dimensional shape. Therefore, even if the three-dimensional shape has a complicated shape, it is easy to set the color information so that the upper and lower layers have different color distributions.

10 Generator 12 Controller 14 Operation unit 16 Display unit 18 Communication unit 20 Storage unit 32, 40, 50, 60 Three-dimensional shape 34 Voxel 42 Two-dimensional development image 54 Color distribution image 56 Overlapping area 58 Bisection line 64 Color distribution image 66 Gap area 68 Pseudo area 70 Overlapping area 100 Three-dimensional modeling device 102 Acquisition unit 104 Generation unit 106 Discharge head 108 Control unit

Claims (11)

A two-dimensional development image generator that generates a two-dimensional development image that expands the color information specified on the surface of the three-dimensional shape represented by the three-dimensional shape data in two dimensions and gives it thickness.
A color distribution information generation unit that generates color distribution information of the two-dimensional development image so that different color distributions are obtained from the top to the bottom of the two-dimensional development image having the thickness.
A three-dimensional modeling data generation unit that generates three-dimensional modeling data by pasting a color distribution image represented by the color distribution information of the two-dimensional development image generated by the color distribution information generation unit on the three-dimensional shape. When,
The overlapping region generated when the color distribution image is pasted on the plurality of surfaces having an angle formed by the plurality of surfaces of the three-dimensional shape is less than 180 degrees, and is pasted on the overlapping region of each of the plurality of surfaces. A compositing unit that synthesizes the color information represented by the attached color distribution image, and
A three-dimensional modeling data generator equipped with. The three-dimensional modeling data generation device according to claim 1, wherein the color distribution information of the two-dimensional developed image includes color distribution information of a plurality of layers having different color distributions in the upper and lower layers. When the color distribution information generation unit generates the color distribution information of the two-dimensional development image so that the color distribution is different from the top to the bottom of the two-dimensional development image, the color distribution information generation unit has different patterns in the continuous upper and lower layers. The three-dimensional modeling data generation device according to claim 1 or 2, wherein halftone processing is performed using the color information so as to be. The three-dimensional modeling data according to any one of claims 1 to 3, wherein the synthesis unit sets a representative value of the color information of each of the plurality of surfaces in the overlapping region as the color information of the overlapping region. Generator. The three-dimensional aspect according to claim 4 , wherein the synthesis unit calculates the representative value so that the closer the distance from the plurality of surfaces is to the overlapping region, the larger the proportion of the color information on the surfaces having the shorter distance is. Modeling data generator. Any of claims 1 to 3, wherein the synthesizing unit sets the color information of each of the plurality of surfaces in each of the divided regions obtained by dividing the overlapping region by bisectors having an angle formed by the plurality of surfaces. The three-dimensional modeling data generation device according to item 1. A two-dimensional development image generator that generates a two-dimensional development image that expands the color information specified on the surface of the three-dimensional shape represented by the three-dimensional shape data in two dimensions and gives it thickness.
A color distribution information generation unit that generates color distribution information of the two-dimensional development image so that different color distributions are obtained from the top to the bottom of the two-dimensional development image having the thickness.
A three-dimensional modeling data generation unit that generates three-dimensional modeling data by pasting a color distribution image represented by the color distribution information of the two-dimensional development image generated by the color distribution information generation unit on the three-dimensional shape. When,
A complementary portion that complements the color information represented by the color distribution image in the gap region generated when the color distribution image is attached to the plurality of surfaces having an angle formed by the plurality of surfaces of the three-dimensional shape exceeding 180 degrees .
A three-dimensional modeling data generator equipped with. The complementing portion complements the gap region with the color information by interpolating the color information of the gap region from the color information on the gap region side of the color distribution image pasted on the plurality of surfaces. Item 7. The device for generating three-dimensional modeling data according to item 7. The color distribution images pasted on the plurality of surfaces are pasted on the plurality of pseudo regions provided on the outside of the plurality of surfaces, and the color distribution images pasted on the plurality of pseudo regions overlap. The overlapping region is provided with a compositing unit that synthesizes the color information represented by the color distribution image attached to each of the plurality of pseudo regions.
The three-dimensional modeling data generation device according to claim 7 , wherein the complementary unit complements the color information set in the overlapping region to the gap region. A discharge head that discharges the modeling material and
An acquisition unit that acquires the three-dimensional modeling data generated by the three-dimensional modeling data generation device according to any one of claims 1 to 9.
A generator that generates slice data obtained by slicing the three-dimensional modeling data on a plurality of surfaces,
Using the slice data generated by the generation unit, a control unit that controls the discharge head so that a three-dimensional shape is formed, and a control unit.
A three-dimensional modeling device equipped with. A three-dimensional modeling data generation program for causing a computer to function as each part of the three-dimensional modeling data generation device according to any one of claims 1 to 9.

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