JP2017185715A - Slice image creating apparatus, 3-dimensional configuration generating system, and slice image creating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To create full color slice image in which a section within a thickness from surface may be colored in 3-dimensional configuration generation object.SOLUTION: In a slice image creating apparatus 100, a slice image creating part 74 makes association of a predetermined number of voxels 84 from a voxel DB located at the lowermost position of a first assembly 86 among voxels 84 determined as colored voxels by a colored voxel determining part 68 with first color image 94A, and makes association a predetermined number of voxels 84 from a voxel TB located at the uppermost position of the first assembly 86 among voxels 84 determined as colored voxels by the colored voxel determining part 68 with second color image 94B so as to create a plurality of slice image 98A, 98B as image involving color information.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a slice image creation device, a three-dimensional modeling system, and a slice image creation method.

  Conventionally, a three-dimensional modeling apparatus for modeling a desired three-dimensional modeled object is known. In this type of three-dimensional modeling apparatus, for example, data of a three-dimensional model for modeling a three-dimensional model is created using a computer program. A plurality of slice images corresponding to the cross-sectional shape of the three-dimensional structure are created based on a plurality of slice models created by slicing the three-dimensional model at predetermined intervals.

  In order to create a slice image, STL data is used as data of a three-dimensional model. In the STL data, the normal vector of each triangular surface constituting the three-dimensional model and the coordinate values of the three vertices of each triangle are recorded. Usually, since STL data does not include color information, a three-dimensional structure drawn in full color cannot be formed. Therefore, a three-dimensional structure drawn in full color is formed by adding color information to the slice image. Patent Document 1 discloses a technique in which, in a plurality of cross-sectional bodies constituting a three-dimensional model, the upper surface of a portion where the cross-sectional body is exposed to the outside is used as a chromatic area, and color information is added to the chromatic area.

JP 2003-145630 A

  However, in the technique described in Patent Document 1, it is possible to color only the upper surface of the three-dimensional structure, and it is not possible to color the lower surface (bottom surface), the side surface, and the inside of the three-dimensional structure. That is, with the technique described in Patent Document 1, it is impossible to form a three-dimensional structure colored by a certain thickness from the surface of the three-dimensional structure.

  The present invention has been made in view of such points, and its purpose is to color a certain thickness from the surface of the three-dimensional structure in the three-dimensional structure forming apparatus that forms the three-dimensional structure that is the object to be formed. It is to provide a slice image creation apparatus, a three-dimensional modeling system, and a slice image creation method capable of creating a full-color slice image capable of being processed.

  The slice image creation apparatus according to the present invention is a slice image creation apparatus that creates a slice image for modeling the three-dimensional structure in the three-dimensional structure apparatus that models a three-dimensional structure that is a modeling target, A storage unit that stores a three-dimensional model of the three-dimensional structure, an arrangement unit that arranges the three-dimensional model in an XYZ coordinate space divided into voxels, and slices the three-dimensional model at predetermined intervals. A slice model creation unit that creates a plurality of slice models, and a first aggregate including all voxels continuous in the Z-axis direction with respect to one voxel on the XY plane of the XYZ coordinate space, on the XY plane For all voxels, a first selection unit to select each voxel, and for each voxel of the selected first set, whether the voxel is located at the bottom of the first set A first determination unit that determines whether or not the slice model is included in a direction toward the uppermost voxel or a direction from the uppermost voxel of the first aggregate toward the lowermost voxel In all voxels including the slice model, the shortest distance value from the voxel not including the slice model to the voxel including the slice model is calculated, and the calculated voxel includes the slice model. In each voxel of the first aggregate, a distance information giving unit that gives the shortest distance value as distance information, and when the shortest distance value of the voxel including the slice model is smaller than a predetermined value, the voxel Is a colored voxel to which color information is added, and the voxel containing the slice model is determined. When the shortest distance value is equal to or greater than the predetermined value, a colored voxel determination unit that determines that the voxel is a non-colored voxel to which no color information is added, and the three-dimensional model arranged in the XYZ coordinate space A first image obtained from the image, a first image obtaining unit for obtaining a second image obtained by viewing the three-dimensional model arranged in the XYZ coordinate space from above, and color information is added to the first image to add a second image. A first color image creating unit that creates a first color image and adds a color information to the second image to create a second color image; and the voxels that are determined as the colored voxels by the colored voxel determining unit The first color image is associated with a predetermined number of voxels from the lowest voxel of the first aggregate, and is determined as the colored voxel by the colored voxel determining unit. A plurality of slice images which are images to which color information is added by associating the second color image with a predetermined number of voxels from the voxel positioned at the top of the first aggregate among the voxels thus obtained. And a slice image creation unit to create.

  According to the slice image creation device of the present invention, a full-color slice image to which color information is added can be created from a three-dimensional model of a three-dimensional structure to be shaped. That is, in the slice image creation device, the slice image creation unit includes a first color image from a voxel positioned at the bottom of the first aggregate among the voxels determined by the color voxel determination unit to a predetermined number of voxels. Color information is added by associating the second color image with a predetermined number of voxels from the voxel positioned at the top of the first aggregate among the voxels determined to be colored by the colored voxel determination unit. A plurality of slice images that are the created images are created. As a result, the entire surface of the three-dimensional structure that is the object to be formed, that is, the upper surface, the lower surface, and the side surface of the three-dimensional structure, and the full color that can be colored only by a certain thickness from the surface of the three-dimensional structure. It is possible to create a plurality of slice images that are images of Further, in a separately prepared three-dimensional modeling apparatus, using the created full-color slice image, for example, by applying a binder to the powder material, by sequentially laminating a layer of the powder material of the cross-sectional shape along the slice image, A three-dimensional structure depicted in full color can be formed. Furthermore, since the coloring to the part which cannot be visually recognized from the outside can be omitted, the amount of ink consumed can be reduced.

  According to the present invention, it is possible to create a full-color slice image that can be colored by a certain thickness from the surface of a three-dimensional structure.

It is sectional drawing of the three-dimensional modeling system which concerns on one Embodiment. It is a top view of the three-dimensional modeling apparatus concerning one embodiment. It is a block diagram of a slice image creation device concerning one embodiment. It is the flowchart which showed the procedure which produces a full-color slice image. It is a perspective view which shows the three-dimensional model arrange | positioned in XYZ coordinate space. It is a side view which shows the three-dimensional model arrange | positioned in XYZ coordinate space. It is a figure which shows the example of a slice model. It is a figure which shows the example of a 1st aggregate. It is a figure which shows the example of a 2nd aggregate. It is a figure which shows the example of a 3rd aggregate. It is a figure which shows the shortest distance value of a some voxel. It is a figure which shows the example of the state by which the shortest distance value was provided to each voxel of the aggregate. It is a figure which shows the example of a 1st image. It is a figure which shows the example of a 2nd image. It is a figure which shows the example of a 3rd image. It is a figure which shows the example of a 1st color image. It is a figure which shows the example of a 2nd color image. It is a figure which shows the example of a 3rd color image. It is a figure which shows the example of a slice image. It is a figure which shows the example of a slice image.

  Hereinafter, a three-dimensional modeling system including a slice image creation device according to an embodiment of the present invention will be described with reference to the drawings. It should be noted that the embodiments described herein are not intended to limit the present invention. In addition, members / parts having the same action are denoted by the same reference numerals, and overlapping descriptions are omitted or simplified as appropriate.

  FIG. 1 is a cross-sectional view of a three-dimensional modeling system 10 according to the present embodiment. FIG. 2 is a plan view of the three-dimensional modeling apparatus 10A. Note that symbols F, Re, L, R, Up, and Dn in the drawings indicate front, rear, left, right, upper, and lower, respectively. However, these are only directions for convenience of explanation, and do not limit the installation mode of the three-dimensional modeling system 10 at all.

  The three-dimensional modeling system 10 is a system for modeling a full-color three-dimensional modeled object. As shown in FIG. 1, the three-dimensional modeling system 10 includes a three-dimensional modeling apparatus 10 </ b> A and a slice image creation apparatus 100. The three-dimensional modeling apparatus 10A applies a binder (for example, an adhesive) to the powder material based on the full-color slice image representing the cross-sectional shape of the three-dimensional modeled object to be modeled, cures the powder material, This is an apparatus for modeling a full-color three-dimensional structure by sequentially laminating powder-cured layers having cross-sectional shapes along slice images. Note that the three-dimensional modeling apparatus 10A is not limited to a mode in which a binder is applied to a powder material as long as a full-color three-dimensional model can be modeled by discharging ink. Here, the “cross-sectional shape” is a shape of a cross section when a three-dimensional structure is sliced for each predetermined thickness (for example, 0.1 mm). Examples of the “powder material” include gypsum, ceramics, metal, plastic, and the like. The “adhesive” is not particularly limited as long as it is a material capable of fixing the powder materials to each other. The three-dimensional modeling apparatus 10 </ b> A includes a modeling unit 31, a supply unit 41, a binder head 12, an ink head 14, and a control device 16.

  In the modeling part 31, the three-dimensional model 18 is modeled. The modeling unit 31 includes a modeling tank 33, a modeling table 32, and a table lifting device 34. In the modeling tank 33, the powder cured layer 18 </ b> A is sequentially laminated on the modeling table 32, and the three-dimensional modeled object 18 is modeled. In the modeling tank 33, the powder material 19 supplied from the supply part 41 is accommodated. The modeling table 32 moves up and down in the modeling tank 33. The table elevating device 34 moves the modeling table 32 in the vertical direction. When one layer of the powder cured layer 18A is formed on the modeling table 32, the table lifting device 34 moves the modeling table 32 downward.

  The supply unit 41 supplies the powder material 19 to the modeling unit 31. The supply unit 41 includes a supply tank 43, a supply table 42, a table lifting / lowering device 44, and a supply roller 15. The powder material 19 is accommodated in the supply tank 43. The supply table 42 moves up and down in the supply tank 43. The table elevating device 44 moves the supply table 42 in the vertical direction. When the powder material 19 is supplied from the supply tank 43 to the modeling tank 33, the table elevating device 44 moves the supply table 42 upward. At this time, the movement amount when the supply table 42 is moved upward is the same as the movement amount when the modeling table 32 is moved downward. The supply roller 15 supplies the powder material 19 accommodated in the supply tank 43 into the modeling tank 33. The supply roller 15 is moved in the left-right direction on the supply tank 43 by a motor (not shown). As shown in FIG. 1 and FIG. 2, when the supply roller 15 is stopped, the supply roller 15 is positioned on the mounting portion 45 provided in the supply portion 41. When the supply roller 15 moves rightward from the mounting portion 45, the powder material in the supply tank 43 is supplied into the modeling tank 33. After the supply roller 15 returns to the mounting portion 45, the table lifting device 44 moves the supply table 42 upward.

  The binder head 12 applies a binder to the powder material 19 supplied to the modeling tank 33. The binder head 12 applies the binder to the region corresponding to the cross-sectional shape along the full-color slice image in the powder material 19 accommodated in the modeling tank 33. Thereby, the powder cured layer 18A is formed. The binder head 12 includes a nozzle 12A that discharges the binder. The nozzle 12A is connected to a tank (not shown) that accommodates the binder. The binder head 12 is connected to a drive device (not shown) and is configured to be movable in the front-rear direction and the left-right direction on the modeling tank 33.

  The ink head 14 applies ink to the powder cured layer 18A. The ink head 14 applies ink of a color based on the full-color slice image to the powder cured layer 18A. The ink head 14 includes a nozzle 14A that ejects ink. The nozzle 14A is connected to a tank (not shown) that stores ink. The ink head 14 is connected to a driving device (not shown) and is configured to be movable in the front-rear direction and the left-right direction on the modeling tank 33. In the present embodiment, the binder head 12 and the ink head 14 are integrally formed, but may be separate.

  The control device 16 is connected to the binder head 12, the ink head 14, the supply roller 15, the table lifting device 34, the table lifting device 44, and the slice image creation device 100. The control device 16 drives the table elevating device 34 to move the modeling table 32 upward or downward. The control device 16 drives the table elevating device 44 to move the supply table 42 upward or downward. The control device 16 controls the discharge of the binder from the binder head 12 and the movement of the binder head 12. The control device 16 controls the ejection of ink from the ink head 14 and the movement of the ink head 14. The control device 16 controls the movement of the supply roller 15. Full-color slice image data is output to the control device 16 from the slice image creation device 100. The configuration of the control device 16 is not particularly limited. For example, the control device 16 is a computer, and may include a central processing unit (hereinafter referred to as a CPU), a ROM storing a program executed by the CPU, a RAM, and the like.

  The configuration of the three-dimensional modeling apparatus 10A according to the present embodiment has been described above. In the slice image creation apparatus 100 according to the present embodiment, a three-dimensional model corresponding to a three-dimensional structure that is a modeling target is prepared. Here, the three-dimensional model is a polygon mesh model. Then, a plurality of three-dimensional slice models having a cross-sectional shape of the three-dimensional structure are created by slicing the three-dimensional model in the horizontal direction at predetermined intervals. Then, by adding color information to the slice model, a plurality of two-dimensional full-color slice images corresponding to the cross-sectional shape of the three-dimensional structure are created. In the present embodiment, the three-dimensional modeling apparatus 10A models the three-dimensional structure 18 by applying a binder to the powder material 19 and sequentially laminating the powder cured layers 18A having a cross-sectional shape along the slice image.

  The slice image creation device 100 creates a plurality of full-color slice images representing the cross-sectional shape of the three-dimensional structure based on the three-dimensional model of the three-dimensional structure that is the modeling object. The slice image creation apparatus 100 may be separate from the 3D modeling apparatus 10A, or may be incorporated in the 3D modeling apparatus 10A. For example, the slice image creation apparatus 100 is a computer, and may include a ROM and a RAM that store programs executed by the CPU. Here, a full-color slice image is created using a program stored in the computer. The slice image creation apparatus 100 may be a dedicated computer for the three-dimensional modeling system 10 or a general-purpose computer.

  FIG. 3 is a block diagram of the slice image creation apparatus 100. As illustrated in FIG. 3, the slice image creation apparatus 100 includes a storage unit 50, an arrangement unit 52, a slice model creation unit 54, a first selection unit 56A, a second selection unit 56B, and a third selection unit 56C. A first determination unit 58A, a second determination unit 58B, a third determination unit 58C, a distance information providing unit 66, a colored voxel determination unit 68, a first image acquisition unit 70A, and a second image acquisition unit. 70B, a third image acquisition unit 70C, a first color image creation unit 72A, a second color image creation unit 72B, a third color image creation unit 72C, and a slice image creation unit 74. In addition, each part mentioned above may be comprised by software, and may be comprised by hardware.

  Here, it is assumed that a three-dimensional model of a three-dimensional structure that is a modeling target is stored in the storage unit 50 in advance. The data of the three-dimensional model is read into the storage unit 50 from a storage medium or another computer (not shown) by a user operation, for example.

  FIG. 4 is a flowchart showing a procedure for creating a full-color slice image. As illustrated in FIG. 4, the slice image creation apparatus 100 creates a full-color slice image based on the three-dimensional model.

  First, in step S10, the arrangement unit 52 arranges the three-dimensional model 80 stored in the storage unit 50 in the XYZ coordinate space divided into voxels 84 as shown in FIG. FIG. 6 is a side view of the three-dimensional model 80 arranged in the XYZ coordinate space as viewed from the front. The ridgeline of the three-dimensional model 80 is indicated by a bold line. The position where the three-dimensional model 80 is arranged in the XYZ coordinate space may be specified by the user or may be automatically determined.

  Next, in step S20, the slice model creation unit 54 creates a plurality of slice models 82. An example of the slice model created by the slice model creation unit 54 is the slice model 82 of FIG. Specifically, the slice model creation unit 54 slices the three-dimensional model 80 arranged in the XYZ coordinate space in the vertical direction (Z-axis direction) at a predetermined interval, thereby dividing the plurality of voxel 84 units. A slice model 82 is created. The three-dimensional model 80 is sliced parallel to the XY plane. The XY plane is a plane including, for example, the X axis and the Y axis. The predetermined interval is a value stored in advance in the storage unit 50. The predetermined interval is, for example, the same as the vertical length of one voxel.

  Next, in step S30, the first selection unit 56A includes a first voxel 84 that includes all the voxels 84 that are continuous in the Z-axis direction with respect to one voxel 84 on the XY plane of the XYZ coordinate space, as shown in FIG. A collection 86 (see also FIG. 8A) is selected. The first selection unit 56A selects the first aggregate 86 for all voxels 84 on the XY plane. For example, the first selection unit 56A selects the first aggregate 86 in order from the voxel 84 having the smallest XY coordinate value.

  Next, in step S40, the first determination unit 58A determines whether or not the slice model 82 is included for each voxel 84 of the selected first aggregate 86. As shown in FIG. 8A, the first determination unit 58A, for each voxel 84 of the selected assembly 86, in the direction from the voxel 84A located at the bottom of the assembly 86 to the voxel 84I located at the top, It is determined whether or not the slice model 82 is included. The first determination unit 58A may determine whether or not the slice model 82 is included in a direction from the uppermost voxel 84I of the first aggregate 86 to the lowermost voxel 84A. In FIG. 8A, the voxel 84 represented by a solid line includes the slice model 82, and the voxel 84 represented by the broken line does not include the slice model 82. In the example illustrated in FIG. 8A, it is determined that the slice model 82 is not included for the voxels 84A to 84C and 84G to 84I. For the voxels 84D to 84F, it is determined that the slice model 82 is included. The determination result of whether or not the slice model 82 is included in each voxel 84 of each first aggregate 87 is stored in the storage unit 50.

  Next, in step S <b> 50, the distance information giving unit 66 gives distance information to the voxel 84 including the slice model 82. Here, first, the distance information assigning unit 66 has the shortest distance value from the voxel 84 not including the slice model 82 adjacent in the X-axis, Y-axis, and Z-axis directions in all the voxels 84 including the slice model 82. Is calculated.

  Hereinafter, a method of calculating the shortest distance value of the voxel 84AA shown in FIG. 9 will be described. A voxel 84AB, a voxel 84AC, a voxel 84AD, and a voxel 84AE are arranged on both sides of the voxel 84AA in the X-axis direction. Voxel 84AF, voxel 84AG, voxel 84AH and voxel 84AI are arranged on both sides in the Z-axis direction of voxel 84AA. Voxel 84AJ, voxel 84AK, voxel 84AL, and voxel 84AM are arranged on both sides of voxel 84AA in the Y-axis direction. A voxel that does not include the slice model 82 (for example, 84AB) draws a voxel edge by a two-dot chain line, and a voxel that includes the slice model 82 (for example, 84AC, etc.) draws a voxel edge by a solid line to distinguish each other. .

  The voxel 84AB does not include the slice model 82. For this reason, the distance information giving unit 66 gives the shortest distance value 0 to the voxel 84AB as the distance information. The voxel 84AD, the voxel 84AF, the voxel 84AH, the voxel 84AJ, and the voxel 84AL are given the shortest distance value 0 as the distance information similarly to the voxel 84AB. From this, it can be seen that the voxel to which the shortest distance value 0 is given as the distance information is equivalent to the voxel not including the slice model 82.

  The voxel 84AC includes a slice model 82. The voxel 84AC is adjacent to the voxel 84AB that does not include the slice model 82. For this reason, the distance information assigning unit 66 assigns the shortest distance value 1 obtained by adding 1 to the shortest distance value 0 given as distance information to the voxel 84AB as distance information to the voxel 84AC. The voxel 84AE, the voxel 84AG, the voxel 84AI, the voxel 84AK, and the voxel 84AM are given the shortest distance value 1 as the distance information similarly to the voxel 84AC.

  The voxel 84AA includes a slice model 82. The voxel 84AA is adjacent to the voxel 84AC, the voxel 84AE, the voxel 84AG, the voxel 84AI, the voxel 84AK, and the voxel 84AM. Here, the distance information assigning unit 66 uses, as distance information, the shortest distance value obtained by adding 1 to the shortest distance value assigned to the voxel having the smallest shortest distance value among the voxels 84AC to 84AM adjacent to the voxel 84AA. To voxel 84AA. Here, the shortest distance value given to the voxels 84AC to 84AM as distance information is 1, which is the same as each other. For this reason, the distance information giving unit 66 gives the shortest distance value 2 to the voxel 84AA as distance information. If the shortest distance value assigned to at least one of the voxels 84AC to 84AM adjacent to the voxel 84AA is 0, the distance information assigning unit 66 sets the shortest distance value 1 as distance information to the voxel 84AA. Give. In the present embodiment, the distance information assigning unit 66 adds 1 to the shortest distance value assigned to the voxel having the smallest shortest distance value, but the value to be added is not limited to 1. FIG. 10 is a diagram illustrating an example of a state in which the shortest distance value is assigned as distance information to each voxel 84 of the first aggregate 86 by the distance information assigning unit 66.

  Next, in step S60, the colored voxel determination unit 68 determines whether or not the shortest distance value is equal to or greater than a predetermined value in the voxels 84 determined to include the slice model 82 among the voxels 84 of the first aggregate 86. Determine whether. As a result, when the shortest distance value of the voxel 84 including the slice model 82 is smaller than a predetermined value in each voxel 84 of the first aggregate 86, the colored voxel determination unit 68 displays the voxel 84 with the color information. It is determined as a colored voxel to be added. The colored voxel determination unit 68 adds color information to each voxel 84 when the shortest distance value of the voxel 84 including the slice model 82 is equal to or greater than a predetermined value. It is determined as a non-colored voxel that is not performed. The order in which the colored voxel determination unit 68 determines the voxel 84 is not particularly limited. The predetermined value is stored in advance in the storage unit 50. The predetermined value is determined arbitrarily by the user. Here, the predetermined value is set to 3. In the example shown in FIG. 10, since the shortest distance value of the voxel 84RD, the voxel 84RE, and the voxel 84RF is not less than a predetermined value among the voxels 84 of the first aggregate 86, the colored voxel determination unit 68 determines that the voxel 84RD is a non-colored voxel. Is done. Further, the colored voxel determining unit 68 determines that the voxel 84 to which the shortest distance value is given as 0 by the distance information providing unit 66 does not include the slice model 82 that is a premise of coloring, and thus is determined as a non-colored voxel. To do. Among the voxels 84 of the first aggregate 86, for the voxels whose shortest distance value given by the distance information assigning unit 66 is smaller than a predetermined value (the shortest distance value is 1 or 2), the colored voxel determining unit 68 is colored. Judge as voxel.

  Next, in step S70, the first image acquisition unit 70A acquires a first image 91A (see FIG. 11A) obtained by viewing the three-dimensional model 80 arranged in the XYZ coordinate space from below. Here, the lowermost voxel 84 including the slice model 82 in each first assembly 86 is referred to as a voxel DB for convenience of explanation. The voxel DB is a voxel having a minimum Z coordinate value. In the example shown in FIG. 8A, the voxel 84D is a voxel DB. 70 A of 1st image acquisition parts acquire the 1st image 91A which consists of an aggregate | assembly of voxel DB when the three-dimensional model 80 arrange | positioned in XYZ coordinate space is seen from the downward direction.

  In step S70, the first image acquisition unit 70A acquires a second image 91B (see FIG. 11A) obtained by viewing the three-dimensional model 80 arranged in the XYZ coordinate space from above. Here, the uppermost voxel 84 including the slice model 82 in each first assembly 86 is referred to as a voxel TB for convenience of explanation. The voxel TB is a voxel having the maximum Z coordinate value. In the example shown in FIG. 8A, the voxel 84F is the voxel TB. 70 A of 1st image acquisition parts acquire the 2nd image 91B which consists of an aggregate | assembly of the voxel TB when the three-dimensional model 80 arrange | positioned in XYZ coordinate space is seen from upper direction.

  Next, in step S80, the first color image creation unit 72A creates a first color image 94A (see FIG. 12A) by adding color information to the first image 91A. The first color image creation unit 72A creates color image 94B (see FIG. 12A) by adding color information to the second image 91B. The first color image creation unit 72A adds color information to the first image 91A and the second image 91B in units of voxels 84. The first color image creation unit 72A adds arbitrary color information to each voxel 84 based on, for example, a user instruction. In FIG. 12A, color information is added to the voxel DB (voxel TB) and is represented by diagonal lines.

  Next, in step S90, the second selection unit 56B includes, as shown in FIG. 5, a second voxel 84 that includes all voxels 84 that are continuous in the Y-axis direction with respect to one voxel 84 on the XZ plane of the XYZ coordinate space. The aggregate 87 is selected. The second selection unit 56B selects the second aggregate 87 for all the voxels 84 on the XZ plane. For example, the second selection unit 56B selects the second aggregate 87 in order from the voxel 84 having the smallest XZ coordinate value.

  Next, in step S100, the second determination unit 58B determines whether or not the slice model 82 is included for each voxel 84 of the selected second aggregate 87. As shown in FIG. 8B, the second determination unit 58 </ b> B changes the voxel 84 of the selected second aggregate 87 from the voxel 84 </ b> J positioned at the foremost position of the second aggregate 87 to the voxel 84 </ b> P positioned at the rearmost position. It is determined whether or not the slice model 82 is included in the heading direction. The second determination unit 58B may determine whether or not the slice model 82 is included in a direction from the voxel 84P located at the rearmost position of the second aggregate 87 to the voxel 84J located at the frontmost position. In the example illustrated in FIG. 8B, it is determined that the slice model 82 is not included for the voxel 84J and the voxel 84P. It is determined that the slice model 82 is included for the voxels 84K to 84O. The determination result of whether or not the slice model 82 is included in each voxel 84 of each second aggregate 87 is stored in the storage unit 50.

  Next, in step S110, the second image acquisition unit 70B acquires a third image 92A (see FIG. 11B) in which the three-dimensional model 80 arranged in the XYZ coordinate space is viewed from the front. Here, the frontmost voxel 84 including the slice model 82 in each second aggregate 87 is referred to as a voxel FB for convenience of explanation. The voxel FB is a voxel having the minimum Y coordinate value. In the example shown in FIG. 8B, the voxel 84K is the voxel FB. The second image acquisition unit 70B acquires a third image 92A made up of a collection of voxels FB when the three-dimensional model 80 arranged in the XYZ coordinate space is viewed from the front.

  In Step S110, the second image acquisition unit 70B acquires a fourth image 92B (see FIG. 11B) obtained by viewing the three-dimensional model 80 arranged in the XYZ coordinate space from the rear. Here, the last voxel 84 including the slice model 82 in each second aggregate 87 is referred to as a voxel BB for convenience of explanation. The voxel BB is a voxel having the maximum Y coordinate value. In the example shown in FIG. 8B, the voxel 84O is the voxel BB. The second image acquisition unit 70B acquires a fourth image 92B made up of a collection of voxels BB when the three-dimensional model 80 arranged in the XYZ coordinate space is viewed from behind.

  Next, in step S120, the second color image creation unit 72B creates a third color image 95A (see FIG. 12B) by adding color information to the third image 92A. Further, the second color image creation unit 72B adds the color information to the fourth image 92B to create a fourth color image 95B (see FIG. 12B). The second color image creation unit 72B adds color information to the third image 92A and the fourth image 92B in units of voxels 84. The second color image creation unit 72B adds arbitrary color information to each voxel 84 based on, for example, a user instruction. In FIG. 12B, color information is added to the voxel FB (voxel BB) and is represented by diagonal lines.

  Next, in step S130, the third selection unit 56C includes all the voxels 84 that are continuous in the X-axis direction with respect to one voxel 84 on the YZ plane of the XYZ coordinate space, as shown in FIG. A collection 88 is selected. The third selection unit 56C selects the third aggregate 88 for all voxels 84 on the YZ plane. For example, the third selection unit 56C selects the third aggregate 88 in order from the voxel 84 having the smallest YZ coordinate value.

  Next, in step S140, the third determination unit 58C determines whether or not the slice model 82 is included for each voxel 84 of the selected third aggregate 88. As shown in FIG. 8C, the third determination unit 58 </ b> C, for each voxel 84 of the selected third aggregate 88, the voxel located farthest to the right from the voxel 84 </ b> Q located farthest to the left of the third aggregate 88. It is determined whether or not the slice model 82 is included in the direction toward 84W. The third determination unit 58C may determine whether or not the slice model 82 is included in the direction from the voxel 84W located on the rightmost side of the third aggregate 88 toward the voxel 84Q located on the leftmost side. . In the example illustrated in FIG. 8C, it is determined that the slice model 82 is not included in the voxel 84Q and the voxel 84W. It is determined that the slice model 82 is included for the voxels 84R to 84V. The determination result of whether or not the slice model 82 is included in each voxel 84 of each third aggregate 88 is stored in the storage unit 50.

  Next, in step S150, the third image acquisition unit 70C acquires a fifth image 93A (see FIG. 11C) in which the three-dimensional model 80 arranged in the XYZ coordinate space is viewed from the left. Here, in the third aggregate 88, the leftmost voxel 84 including the slice model 82 is referred to as a voxel LB for convenience of explanation. The voxel LB is a voxel having the minimum X coordinate value. In the example shown in FIG. 8C, the voxel 84R is the voxel LB. The third image acquisition unit 70 </ b> C acquires a fifth image 93 </ b> A that is an aggregate of voxels LB when the three-dimensional model 80 arranged in the XYZ coordinate space is viewed from the left.

  In step S150, the third image acquisition unit 70C acquires a sixth image 93B (see FIG. 11C) obtained by viewing the three-dimensional model 80 arranged in the XYZ coordinate space from the right side. Here, in the third aggregate 88, the rightmost voxel 84 including the slice model 82 is referred to as a voxel RB for convenience of explanation. The voxel RB is a voxel having the maximum X coordinate value. In the example shown in FIG. 8C, the voxel 84V is the voxel RB. The third image acquisition unit 70 </ b> C acquires a sixth image 93 </ b> B that is an aggregate of voxels RB when the three-dimensional model 80 arranged in the XYZ coordinate space is viewed from the right side.

  Next, in step S160, the third color image creation unit 72C adds color information to the fifth image 93A to create a fifth color image 96A (see FIG. 12C). Further, the third color image creation unit 72C creates a sixth color image 96B (see FIG. 12C) by adding color information to the sixth image 93B. The third color image creation unit 72C adds color information to the fifth image 93A and the sixth image 93B in units of voxels 84. Note that the third color image creation unit 72C adds arbitrary color information to each voxel 84 based on, for example, a user instruction. In FIG. 12C, color information is added to the voxel LB (voxel RB) and is represented by diagonal lines.

  Next, in step S <b> 170, the slice image creating unit 74 determines a predetermined number of voxels 84 from the voxel DB positioned at the bottom of the first aggregate 86 among the voxels 84 determined as colored voxels by the colored voxel determining unit 68. Is associated with the first color image 94A (see FIG. 12A), and a predetermined number of voxels TB among the voxels 84 that are determined as colored voxels by the colored voxel determining unit 68 from the top of the first aggregate 86 The voxel 84 is associated with the second color image 94B (FIG. 12B), and the predetermined number from the voxel FB located in the forefront of the second aggregate 87 among the voxels 84 determined as the colored voxels by the colored voxel determining unit 68. The third color image 95A (see FIG. 12B) is associated with the voxel 84 and the colored voxel determination Among the voxels 84 determined as colored voxels by 68, the fourth color image 95B (see FIG. 12B) is associated with a predetermined number of voxels BB from the voxel BB located at the rearmost of the second aggregate 87, and the colored voxels Among the voxels 84 determined as the colored voxels by the determination unit 68, the fifth color image 96A (see FIG. 12C) is associated with a predetermined number of voxels 84 from the voxel LB located on the leftmost side of the third aggregate 88, and Among the voxels 84 determined as colored voxels by the colored voxel determining unit 68, the sixth color image 96B (see FIG. 12C) is applied to a predetermined number of voxels 84 from the voxel RB located on the rightmost side of the third aggregate 88. By associating, a plurality of slice images, which are images to which color information is added, are created. FIG. 13 is an example of a slice image to which color information is assigned. The slice image 98A is used when modeling a portion corresponding to the uppermost layer of the three-dimensional model 80 in the three-dimensional structure. In the slice image 98A, reference numeral 99A indicates a modeling area, and reference numeral 99B indicates a non-modeling area. The modeling area 99A is provided with color information and is represented by diagonal lines. FIG. 14 is an example of a slice image to which color information is assigned. The slice image 98B is used when modeling a portion corresponding to the middle layer in the Z-axis direction of the three-dimensional model 80 in the three-dimensional structure. In the slice image 98B, reference numeral 99A indicates a modeling area, and reference numeral 99B indicates a non-modeling area. Color information is given to the modeling area 99A except for the area indicated by reference numeral 84Y, which is represented by diagonal lines.

  The predetermined number described above is stored in the storage unit 50 in advance. The predetermined number is arbitrarily determined by the user. In the present embodiment, the predetermined number is, for example, 2. It is assumed that the first color image 94A to the sixth color image 96B are associated with one voxel 84. In this case, the priority order of which image is associated with the voxel 84 is determined in advance. I can keep it. This priority order is arbitrarily determined by the user and stored in the storage unit 50. The priority order can be set for each voxel 84. For example, when the predetermined number is 2, the first color image 94A, the second color image 94B, and the third color image 95A are associated with the voxel 84X in FIG. The slice image creation unit 74 associates the first color image 94A with the voxel 84X by determining in advance that the association is performed with priority.

  The three-dimensional modeling apparatus 10A models a three-dimensional modeled object along the slice image created as described above. For example, the cross-sectional shape corresponding to the slice image 98B is formed using the slice image 98B of FIG. Specifically, the powder cured layer 18A (see FIG. 1) is formed by applying a binder to a region corresponding to the modeling region 99A in the powder material 19. And the ink corresponding to the color information provided to the modeling area | region 99A is discharged to the powder hardening layer 18A. Here, since color information is not given to the region 84Y, ink is not ejected to the region corresponding to the region 84Y in the powder cured layer 18A. In addition, a binder is not apply | coated to the area | region corresponding to the non-formation area | region 99B of the slice image 98B among the powder materials 19. FIG.

  As described above, the slice image creation apparatus 100 according to the present embodiment can create full-color slice images 98A and 98B to which color information is added from the three-dimensional model 80 of the three-dimensional structure 18 that is a modeling target. it can. That is, in the slice image creation device 100, the slice image creation unit 74 has a predetermined number of voxels DB from the voxel DB positioned at the bottom of the first aggregate 86 among the voxels 84 determined as the colored voxels by the colored voxel determination unit 68. The voxel 84 is associated with the first color image 94A, and the voxel 84 determined as the colored voxel by the colored voxel determination unit 68 is changed from the voxel TB positioned at the top of the first aggregate 86 to a predetermined number of voxels 84. By associating the second color image 94B, a plurality of slice images 98A and 98B, which are images to which color information is added, are created. Thereby, it is possible to color the entire surface of the three-dimensional structure 18 to be formed, that is, the upper surface, the lower surface and the side surface of the three-dimensional structure 18 and the surface of the three-dimensional structure 18 by a certain thickness. A plurality of slice images 98A and 98B, which are various full-color images, can be created. Further, in the separately prepared three-dimensional modeling apparatus 10A, using the created full-color slice images 98A and 98B, a binder is applied to the powder material 19, and a layer of the powder material having a cross-sectional shape along the slice images 98A and 98B is applied. The three-dimensional structure 18 drawn in full color can be formed by sequentially stacking the layers. Further, since coloring to the portions 84RD, 84RE, and 84RF (see FIG. 10) that cannot be visually recognized from the outside can be omitted, the amount of ink consumed can be reduced.

  According to the slice image creation device 100 of the present embodiment, the slice image creation unit 74 starts from the voxel FB located at the forefront of the second aggregate 87 among the voxels 84 determined as the colored voxels by the colored voxel determination unit 68. The third color image 95A (see FIG. 12B) is associated with a predetermined number of voxels 84, and among the voxels 84 that are determined as colored voxels by the colored voxel determination unit 68, the voxel that is located at the rearmost position of the second aggregate 87. By associating a fourth color image 95B (see FIG. 12B) with a predetermined number of voxels 84 from BB, a plurality of slice images 98A and 98B, which are images to which color information is added, are created. Thereby, it is possible to create a full-color slice image in which a color can be specified in more detail even on the front surface and the rear surface of the surface of the three-dimensional structure to be formed.

  According to the slice image creating apparatus 100 of the present embodiment, the slice image creating unit 74 includes the voxel LB located on the leftmost side of the third aggregate 88 among the voxels 84 determined as the colored voxels by the colored voxel determining unit 68. The fifth color image 96 </ b> A (see FIG. 12C) is associated with a predetermined number of voxels 84 to the rightmost position of the third aggregate 88 among the voxels 84 that are determined as colored voxels by the colored voxel determination unit 68. By associating the sixth color image 96B (see FIG. 12C) with a predetermined number of voxels 84 from the voxel RB to be created, a plurality of slice images 98A and 98B, which are images to which color information is added, are created. As a result, a full-color slice image that can specify the color in more detail can be created even for the left and right surfaces of the surface of the three-dimensional structure to be modeled.

  In the embodiment described above, the slice image creation apparatus 100 includes the first color image creation unit 72A, the second color image creation unit 72B, and the third color image creation unit 72C. May be provided, or any two may be provided. In this case, the slice image creating unit 74 creates a slice image by associating the created color image with the voxel 84 determined as the colored voxel by the colored voxel determining unit 68. For example, when the slice image creation apparatus 100 does not include the first color image creation unit 72A and the second color image creation unit 72B, but includes the third color image creation unit 72C, the slice image creation unit 74 includes the colored voxels. Among the voxels 84 determined as the colored voxels by the determination unit 68, the fifth color image 96A (see FIG. 12C) is associated with a predetermined number of voxels 84 from the voxel LB located on the leftmost side of the third aggregate 88, and Among the voxels 84 determined as colored voxels by the colored voxel determining unit 68, the sixth color image 96B (see FIG. 12C) is applied to a predetermined number of voxels 84 from the voxel RB located on the rightmost side of the third aggregate 88. By associating, a plurality of slice images, which are images to which color information is added, are created.

  In the above-described embodiment, the distance information adding unit 66 and the colored voxel determining unit 68 calculate the shortest distance value for the voxel 84 of the first aggregate 86, or determine whether the colored voxel is a colored voxel or not. However, it is not limited to this. The distance information giving unit 66 and the colored voxel determining unit 68 calculate the shortest distance value for the voxel 84 of the second aggregate 87 or the voxel 84 of the third aggregate 88, or determine whether the colored voxel is a non-colored voxel. You may go.

  Each unit such as the storage unit 50 of the slice image creation apparatus 100 according to the present embodiment is configured by software and realized by a computer, but each of the above units is realized by a circuit configured in the slice image creation apparatus 100. It may be a thing.

54 slice model creation unit 56A first selection unit 58A first determination unit 66 distance information addition unit 68 colored voxel determination unit 70A first image acquisition unit 72A first color image creation unit 74 slice image creation unit 80 three-dimensional model 82 slice model 84 voxel 86 first aggregate 91A first image, 91B second image 94A first color image, 94B second color image 98A, 98B slice image 100 slice image creation device

Claims (7)

In a three-dimensional modeling apparatus that models a three-dimensional structure that is a modeling target, a slice image creation apparatus that creates a slice image for modeling the three-dimensional structure,
A storage unit for storing a three-dimensional model of the three-dimensional structure;
An arrangement unit for arranging the three-dimensional model in an XYZ coordinate space divided into voxels;
A slice model creating unit that slices the three-dimensional model at a predetermined interval to create a plurality of slice models;
A first selection unit that selects, for each of all voxels on the XY plane, a first aggregate that includes all voxels that are continuous in the Z-axis direction with respect to one voxel on the XY plane of the XYZ coordinate space; ,
For each voxel of the selected first aggregate, the direction from the lowest voxel of the first aggregate to the uppermost voxel or the highest voxel of the first aggregate A first determination unit that determines whether or not the slice model is included in a direction toward a voxel located below;
In all the voxels including the slice model, the shortest distance value from the voxel not including the slice model to the voxel including the slice model is calculated, and the calculated shortest distance to the voxel including the slice model is calculated. A distance information providing unit that assigns each value as distance information;
In each voxel of the first aggregate, when the shortest distance value of the voxel including the slice model is smaller than a predetermined value, the voxel is determined as a colored voxel to which color information is added, and When the shortest distance value of a voxel including a slice model is equal to or greater than the predetermined value, a colored voxel determination unit that determines the voxel as a non-colored voxel to which no color information is added;
A first image acquisition unit that acquires a first image of the three-dimensional model arranged in the XYZ coordinate space viewed from below and a second image of the three-dimensional model arranged in the XYZ coordinate space viewed from above. When,
A first color image creating unit that creates color image by adding color information to the first image, and creates color image by adding color information to the second image;
Of the voxels determined as the colored voxels by the colored voxel determining unit, the first color image is associated with a predetermined number of voxels from the lowest voxel of the first aggregate, and the colored voxels Color information is added by associating the second color image with a predetermined number of voxels from the voxel positioned at the top of the first aggregate among the voxels determined by the determination unit as the colored voxels. A slice image creation device, comprising: a slice image creation unit that creates a plurality of slice images that are images. A second selection unit that selects, for each of all voxels on the XZ plane, a second aggregate that includes all voxels continuous in the Y-axis direction with respect to one voxel on the XZ plane of the XYZ coordinate space; ,
For each voxel of the selected second aggregate, the direction from the voxel located at the foremost position of the second aggregate toward the voxel located at the rearmost position or from the voxel located at the rearmost position of the second aggregate. A second determination unit that determines whether or not the slice model is included in a direction toward a voxel located;
A second image acquisition unit that acquires a third image obtained by viewing the three-dimensional model arranged in the XYZ coordinate space from the front and a fourth image obtained by viewing the three-dimensional model arranged in the XYZ coordinate space from the rear. When,
A second color image creation unit for creating a third color image by adding color information to the third image, and creating a fourth color image by adding color information to the fourth image;
The slice image creation unit is configured to apply the third color image to a predetermined number of the voxels from the voxel positioned in the forefront of the second aggregate among the voxels determined by the colored voxel determination unit as the colored voxels. By associating and associating the fourth color image with a predetermined number of voxels from the voxels located at the rearmost of the second aggregate among the voxels determined as the colored voxels by the colored voxel determining unit The slice image creation device according to claim 1, wherein a plurality of slice images which are images to which color information is added are created. A third selection unit that selects, for each of all voxels on the YZ plane, a third aggregate that includes all voxels that are continuous in the X-axis direction with respect to one voxel on the YZ plane of the XYZ coordinate space; ,
For each selected voxel of the third aggregate, the direction from the leftmost voxel of the third aggregate to the rightmost voxel or the most rightmost voxel of the third aggregate A third determination unit that determines whether or not the slice model is included in a direction toward the voxel located on the left;
A third image for acquiring a fifth image obtained by viewing the three-dimensional model arranged in the XYZ coordinate space from the left side and a sixth image obtained by viewing the three-dimensional model arranged in the XYZ coordinate space from the right side. An acquisition unit;
A third color image creation unit for creating a fifth color image by adding color information to the fifth image, and creating a sixth color image by adding color information to the sixth image;
The slice image creation unit includes the fifth color image from a voxel positioned to the left of the third aggregate among the voxels determined to be the colored voxel by the colored voxel determination unit to a predetermined number of the voxels. And the sixth color image is associated with a predetermined number of the voxels from the voxels positioned to the right of the third aggregate among the voxels determined as the colored voxels by the colored voxel determining unit. The slice image creation apparatus according to claim 1, wherein the plurality of slice images that are images to which color information is added are created. A three-dimensional modeling apparatus for modeling a full-color three-dimensional model;
A slice image creation device according to any one of claims 1 to 3,
3D modeling system with In a three-dimensional modeling apparatus that models a three-dimensional structure that is a modeling target, a slice image creation method that creates a slice image for modeling the three-dimensional structure,
An arrangement step of arranging a three-dimensional model of the three-dimensional structure in an XYZ coordinate space divided into voxels;
Slicing the three-dimensional model at a predetermined interval to create a plurality of slice models;
A first selection step of selecting, for each voxel on the XY plane, a first aggregate including all voxels continuous in the Z-axis direction with respect to one voxel on the XY plane of the XYZ coordinate space; ,
For each voxel of the selected first aggregate, the direction from the lowest voxel of the first aggregate to the uppermost voxel or the highest voxel of the first aggregate A first determination step of determining whether or not the slice model is included in a direction toward a voxel located below;
In all the voxels including the slice model, the shortest distance value from the voxel not including the slice model to the voxel including the slice model is calculated, and the calculated shortest distance to the voxel including the slice model is calculated. A distance information giving step for assigning each value as distance information;
In each voxel of the first aggregate, when the shortest distance value of the voxel including the slice model is smaller than a predetermined value, the voxel is determined as a colored voxel to which color information is added, and When the shortest distance value of the voxel including the slice model is equal to or greater than the predetermined value, a colored voxel determination step of determining the voxel as a non-colored voxel to which no color information is added;
A first image acquisition step of acquiring a first image obtained by viewing the three-dimensional model arranged in the XYZ coordinate space from below and a second image obtained by viewing the three-dimensional model arranged in the XYZ coordinate space from above. When,
A first color image creating step of creating a first color image by adding color information to the first image, and creating a second color image by adding color information to the second image;
Among the voxels determined as the colored voxels in the colored voxel determining step, the first color image is associated with a predetermined number of voxels from the lowest voxel of the first aggregate, and the colored voxels Color information is added by associating the second color image with a predetermined number of voxels from the voxel positioned at the top of the first aggregate among the voxels determined as the colored voxels in the determination step. A slice image creating step of creating a plurality of slice images as images. A second selection step of selecting, for each of all voxels on the XZ plane, a second aggregate including all voxels continuous in the Y-axis direction with respect to one voxel on the XZ plane of the XYZ coordinate space; ,
For each voxel of the selected second aggregate, the direction from the voxel located at the foremost position of the second aggregate toward the voxel located at the rearmost position or from the voxel located at the rearmost position of the second aggregate. A second determination step of determining whether or not the slice model is included in a direction toward a voxel located;
A second image acquisition step of acquiring a third image obtained by viewing the three-dimensional model arranged in the XYZ coordinate space from the front and a fourth image obtained by viewing the three-dimensional model arranged in the XYZ coordinate space from the rear. When,
A second color image creating step of creating a third color image by adding color information to the third image and creating a fourth color image by adding color information to the fourth image;
In the slice image creation step, the third color image is applied to a predetermined number of voxels from the voxels positioned in the forefront of the second aggregate among the voxels determined as the colored voxels in the colored voxel determining step. By associating and associating the fourth color image with a predetermined number of voxels from the voxels located at the rearmost of the second aggregate among the voxels determined as the colored voxels in the colored voxel determining step. The slice image creation method according to claim 5, wherein a plurality of the slice images, which are images to which color information is added, are created. A third selection step of selecting, for all voxels on the YZ plane, a third aggregate including all voxels continuous in the X-axis direction with respect to one voxel on the YZ plane in the XYZ coordinate space; ,
For each selected voxel of the third aggregate, the direction from the leftmost voxel of the third aggregate to the rightmost voxel or the most rightmost voxel of the third aggregate A third determination step of determining whether or not the slice model is included in a direction toward the voxel located on the left;
A third image for acquiring a fifth image obtained by viewing the three-dimensional model arranged in the XYZ coordinate space from the left side and a sixth image obtained by viewing the three-dimensional model arranged in the XYZ coordinate space from the right side. Acquisition process;
A third color image creating step for creating a fifth color image by adding color information to the fifth image, and creating a sixth color image by adding color information to the sixth image;
In the slice image creation step, among the voxels determined as the colored voxels in the colored voxel determining step, the fifth color image is applied to a predetermined number of the voxels from the leftmost voxel of the third aggregate. And the sixth color image is associated with a predetermined number of the voxels from the voxels positioned to the right of the third aggregate among the voxels determined as the colored voxels in the colored voxel determining step. The slice image creation method according to claim 5 or 6, wherein a plurality of slice images that are images to which color information is added are created.

Images