JP5010450B2 - Dressing simulation device, simulation method, and simulation program - Google Patents

Description

  The present invention relates to dressing simulation, and more particularly to speeding up the simulation.

  The applicant is considering three-dimensional simulation of the wearing state of the knit garment. A problem in simulation is speeding up. Patent Document 1: Japanese Patent Application Laid-Open No. 2005-242611, Patent Document 2: Japanese Patent Application Laid-Open No. 2005-240213, and Patent Document 3: PCT / JP2007 / 64936 proposed a method for speeding up. Japanese Patent Application Laid-Open No. 11-238086 discloses a method of displaying and selecting a 2D image of a clothing part and an approximate simulation when a human body model is changed.

In the simulation of the wearing state of the knit garment, parts such as a neck portion may be changed during the simulation. For example, a U-neck garment may be simulated first, and then the neck design may be changed to a V-neck or a turtleneck. However, in the methods of Patent Documents 1 to 4, it is inefficient because it is necessary to restart the simulation from the beginning if the parts are changed.
JP-A-2005-242611 JP-A-2005-240213 PCT / JP2007 / 64936 JP-A-11-238086

  An object of the present invention is to enable simulation for a knit garment after the change in a short time when the part is changed.

The present invention provides an apparatus for three-dimensionally wearing a knit garment design on a model on a computer.
3D simulation means for creating a transparent 3D image simulating a state in which the model is worn with data obtained by adding a part having a predetermined shape that does not exist in the design to a specific location of the design ;
When the specific part of the design is changed, at least for the design change part, a garment image creation means for creating an image of the knit garment before the model is worn ,
Mapping means for mapping the created knit garment image on the 3D image is provided.

The present invention also provides a method for three-dimensionally attaching a knit garment design to a model on a computer.
Create a transparent 3D image that simulates a state in which the model is worn with data in which a part of a predetermined shape that does not exist in the design is added to a specific part of the design ,
When the specific part of the design is changed, at least for the design change part, create an image of the knit garment before the model is worn ,
The created knit garment image is mapped onto the 3D image.

The present invention also provides a program executed by a computer for simulating a state in which a model is three-dimensionally wearing a knit garment design.
In the computer,
Creating a transparent 3D image that simulates a state in which the model is worn with data in which a part having a predetermined shape that does not exist in the design is added to a specific part of the design ;
When the specific part of the design is changed, at least for the design change part, creating an image of the knit garment before the model is worn ;
An image of knit garment created, step of mapping on the 3D image, characterized in that to execute the city.

Preferably, further providing a pattern creating means for creating, as the data, a part in which the predetermined shape part is added to the specific portion of the shape pattern corresponding to the design of the knit garment,
The 3D simulation means creates a transparent 3D image that simulates a state in which the model is worn on the pattern, and the garment image creation means creates an image of the entire knit garment,
The mapping means maps an image of the entire knit garment on the 3D image of a pattern and on a portion excluding the added part,
The garment image creation means re-creates a knit garment image at least for the design change section, and re-maps the re-created knit garment image onto the 3D image of the pattern by the mapping means.

Preferably, the specific part is a neck part of a knit garment, and the part having the predetermined shape is a part for changing the design of the neck to a turtleneck.
Preferably, the specific part is a sleeve of a knit garment, and the part of the predetermined shape is a part for changing the design of the sleeve to a long sleeve.

Preferably, when the organization pattern is edited in the design,
A knit garment image is re-created for at least the tissue pattern edited by the garment image creating means, and the re-created knit garment image is re-mapped on the 3D image of the pattern by the mapping means.

  In this specification, the description regarding the simulation apparatus also applies to the simulation method and the simulation program as it is, and the description regarding the simulation method and the simulation program also applies to the simulation apparatus.

  According to the present invention, when the design of the knit garment is changed, it is only necessary to create an image before wearing and map it to a 3D image. Therefore, the simulation can be performed in a much shorter time than when the simulation is restarted from the beginning.

  Here, a 3D image is obtained by simulating the wearing state of the pattern, and if the knit garment image is mapped to this image, the first simulation can be performed in a short time.

  This invention can perform a simulation in a short time when the design of the neck portion is changed or when the design of the sleeve is changed.

  When the tissue pattern is edited, the knit garment image can be recreated and re-mapped on the 3D image of the pattern to simulate the edited tissue pattern in a short time.

  In the following, an optimum embodiment for carrying out the present invention will be shown.

  An example is shown in FIGS. FIG. 1 shows hardware of the wearing simulation apparatus 2. 4 is a main bus, 6 is a graphic bus, 8 is a CPU (Central Processing Unit), and 10 is a general-purpose memory. Reference numeral 11 denotes a manual input, which includes a keyboard, mouse, stylus, joystick, trackball, and the like. A color monitor 12 displays a design of a knit product to be simulated and a simulation image. A color printer 13 prints a simulation image or the like. The input / output 14 performs input / output with the disk 15 or the Internet, and the wearing simulation program is stored in the disk 15 or the like, or is supplied to the input / output 14 from the Internet or the like via a carrier wave.

  A GPU (Graphic Processing Unit) 16 is a processor specialized for image processing, particularly 3D image processing, and stores data being processed and processing result data (3D images) in the GPU memory 18. The CPU 8 interprets the input from the manual input 11 and the input / output 14, performs processing other than the 3D simulation using the general-purpose memory 10, and the GPU 16 executes the 3D simulation in response to a command from the CPU 8.

  If the wearing simulation program of the embodiment is stored in the wearing simulation apparatus 2 of FIG. 1, an architecture is obtained as shown in FIG. A knit design unit 20 designs a knit garment in response to an input from the manual input 11 or the input / output 14. The data converter 21 converts the knit garment design data into knitting data that can be executed by a knitting machine such as a flat knitting machine. The pattern creating unit 22 creates a pattern image corresponding to the design of the knit garment or the knitting data corresponding thereto. In this specification, pattern data and pattern image are synonymous. A knit garment is composed of a plurality of parts such as a front body, a back body, a collar, and a sleeve, and it is arbitrary whether these parts are sewn into a single knit garment or a knit garment by sewing.

  The pattern corresponds to a collection of these parts, and the knit garment and knitting data include about 100,000 stitches. On the other hand, the pattern is a non-thick sheet having a density and rigidity corresponding to the material of the knit garment. A physical model of a pattern is composed of individual points obtained by partitioning the pattern in a grid pattern, and each point has a mass and is connected to an adjacent point by a spring. Note that such a pattern model itself is well known in a wearing simulation of a fabric (Woven Fabric).

  The pattern created in the embodiment does not necessarily match the design of the knit garment, and generally, the portion such as the neck and the sleeve where the design is easily changed is made longer than the design of the knit garment. For example, in the neck design, a U neck, a V neck, and a turtleneck are often used, and the pattern creation unit 22 outputs the turtleneck design for the U neck and V neck designs. In addition, long sleeves up to the wrist or short sleeves are used for the sleeves, and the pattern creating unit 22 creates a long sleeve pattern when the sleeves exist. Similarly, a sweater, a dress, a skirt, and the like have a degree of freedom in length, and the pattern creation unit 22 creates a long length pattern. The additional pattern storage unit 23 stores rules for changing the neck design to a turtleneck, changing the sleeve design to long sleeves, and changing the length to a long length with respect to the knit garment design.

  The knit simulation unit 25 executes 2D simulation of the knit product based on the knitting data, or executes 3D simulation without a human body model. A 2D simulation provides a 2D image of the knit garment, and a 3D simulation provides a 3D image without a human body model. When the wearing state is simulated, the simulation takes a long time due to interference with the human body model and drape due to gravity. On the other hand, for example, if a 3D simulation of a knit garment placed on a flat board is performed, the simulation time is short. In 2D simulation, simulation can be performed at higher speed.

  The pattern simulation unit 26 performs a 3D simulation of the wearing state of the human body model on the virtual garment obtained by sewing the individual patterns (parts) created by the pattern creation unit 22. This simulation is known in the simulation of garments made of fabric. The memory 28 stores various data, for example, knit garment knitting data, 2D simulation images, 3D simulation images on a flat table, 2D pattern images before simulation, and 3D simulation of the wearing state of the patterns. A pattern image or the like is stored.

  The difference unit 30 detects a knit garment design change unit or a knitting data change unit associated therewith. That is, the part where the design of the knit garment is changed is detected. The mapping unit 32 maps the 2D simulation image or the 3D simulation image of the knit on the flat table to the 3D pattern image via the 2D pattern image. Thereby, the stitches of the knit garment are mapped to the 3D pattern image that simulates the wearing state.

  The simulation of the wearing state of the pattern is approximate as the simulation of the wearing state of the knit garment. Therefore, a knit 3D simulation unit 33 may be provided, and additional simulation may be performed on the knit 3D simulation data obtained by mapping until the stitch position is stabilized. However, the knit 3D simulation unit 33 may not be provided, and a high-quality simulation image can be obtained without additional simulation according to the inventor's experience. The human body model storage unit 34 stores a human body model wearing a knit garment or pattern.

  FIGS. 3 and 4 show simulations of the wearing state of the knit garment, taking two examples of neck design change and tissue pattern addition. First, knit garment is designed, and design data is converted into knitting data. Then, pattern data corresponding to the design data is created, and the neck of the pattern data is changed to the turtle neck. In addition to this, processing such as changing the sleeve to a long sleeve and changing the length to a long length may be performed. Processing such as adding a pocket may be added. 3D simulation of the wearing state is performed on the pattern data after changing the neck design to the turtleneck. In addition, 2D simulation of the knit garment is performed from the knitting data. Alternatively, a 3D simulation of a knit garment placed on a flat table is performed.

  Next, the simulation image of the 2D or 3D knit is mapped to a 3D image representing the wearing state of the pattern via the pattern data. The knit 2D simulation image, the 3D simulation image on a flat table, and the pattern data image, for example, have substantially the same contour, and it can be easily determined which stitch corresponds to which position of the pattern. Then, it can be easily determined which point on the pattern corresponds to which position in the 3D image of the pattern after simulation. Thereby, it is possible to easily determine at which position in the 3D pattern image each stitch of the knit is mapped. Generally, a knit garment includes tens of thousands to hundreds of thousands of stitches. However, if a wearing state is simulated using a pattern, several hundreds to thousands of mass points may be considered. And mapping can be done at high speed. This facilitates simulation of the wearing state.

  In the design of sweaters, the neck design may change. Therefore, when the neck design is changed, the 2D knit simulation image is changed. However, it is not necessary to restart the simulation from the beginning, and it is sufficient to simulate the design change point detected by the difference unit and its surroundings. Then, the knit simulation image after the change is mapped to a 3D image of the pattern. For example, if the design after the change is a U-neck, there is no stitch in the turtleneck portion, and the pattern is mapped only to the portion corresponding to the U-neck in the 3D simulation image of the pattern. The pattern itself is a transparent image. Therefore, the image obtained by mapping is an image corresponding to the U neck.

  In this way, it is only necessary to change the 2D knit simulation image or the like only for the design change portion and map the changed knit simulation image. The part where mapping is performed again may be only the range detected by the difference part. Because of these, design changes can be simulated at high speed.

  The same thing can be done when changing sleeves or body length. A pocketed pattern is created and 3D simulated for a knit garment design without pockets. If the stitches of the knit garment without pockets are mapped to a simulation image of a transparent pattern with pockets, the wearing state of the knit garment without pockets can be simulated. When a pocket is added from here, it is only necessary to change the knitting data only in the pocket portion, change the simulation image of the knit in the pocket portion, and re-mapping only the pocket portion. The principle here is to create a large part including these designs as a pattern for parts with various designs, both large and small.

  During the simulation process, a texture pattern may be added to the knit garment, or the texture pattern may be changed or deleted. Here, the addition of a tissue pattern will be described as an example. When the tissue pattern is added, a related portion is detected by the difference unit, the knitting data is changed, and a 2D knit simulation image is created for the changed knitting data. Then, the changed knit simulation image is mapped to a 3D pattern image in which the wearing state is simulated. The range to be mapped may be, for example, only a portion where the knitting data is changed with the addition of the organization pattern. However, the tension applied to the stitches may change due to the addition of the texture pattern, and the contour of the 2D simulation image may change. In such a case, it is preferable to remap the entire 2D knit simulation image because the stitch mapping destination is different even at positions other than the tissue pattern. Again, a 3D simulation image on a flat table can be used in place of the 2D image, and the same applies to the change or deletion of the tissue pattern.

  FIG. 5 shows the wearing simulation program 50 of the embodiment, and the operation thereof is the same as that described with reference to FIGS. 3 and 4 for the knit simulation apparatus of FIG. A knit design instruction 51 designs a knit garment, and a data conversion instruction 52 converts the knit design into knitting data. The pattern creation command 53 converts the knit design or knitting data into a pattern, and performs design changes such as uniformly changing the neck design into a turtleneck and uniformly changing the sleeve design into long sleeves. The knit simulation command 54 creates a 2D simulation image on a flat table based on the knitting data. The pattern 3D simulation instruction 55 performs 3D simulation of the wearing state of the human body model with respect to the pattern. The mapping command 56 maps the knit simulation image to the 3D pattern simulation image via the 2D pattern image.

  The difference instruction 57 detects a part related to the design change when the design change of the knit garment is performed. Then, the simulation is again executed with the knit simulation command 54 for the part whose design has been changed, and the mapping is again executed with the mapping command 56.

  An example of simulation is shown in FIGS. FIG. 6 shows a sweater pattern, 61 is a U-neck pattern, 62 is a V-neck pattern, 63 is a turtleneck pattern, and a neck pattern 64 is shown separately. Even when the U-neck and V-neck designs are made, the turtleneck pattern 63 is created. FIG. 7 shows a 2D simulation image of the knit garment corresponding to FIG. 6, where only the front body is shown. 71 is a knit simulation image of a U neck, 72 is a knit simulation image of a V neck, 73 is a knit simulation image of a turtle neck, and an image of the neck itself is omitted. The pattern in FIG. 6 and the simulation image in FIG. 7 are similar in shape, and it can be easily determined at which position of the pattern in FIG. 6 each stitch in the simulation image in FIG. 7 is mapped.

  Based on the turtleneck pattern in FIG. 6, a simulation image 80 in FIG. 8 is obtained by simulating the wearing state on the human body model. In this simulation, instead of handling a large number of stitches, patterns can be expressed by mass points connected by springs. For this reason, the model is simplified and simulation can be performed in a short time.

  Next, when the simulation image of the turtleneck is 3D mapped to the image 80 of FIG. 8, the simulation image 90 of FIG. 9 is obtained. If the original knit simulation image is 2D, this is texture mapping the knit 2D simulation image to the image 80. When the knit simulation image is a 3D image, the image is composed of a large number of polygons. Considering the stitch unit, it can be easily determined which position in the image 80 the center of the stitch is mapped to. Next, the direction in which the stitch is oriented can be obtained from the orientation of the polygon at each position of the image 80. Therefore, the direction of the stitch is determined based on the orientation of the image 80 at the mapping destination, and a large number of polygons constituting the stitch are mapped to the image 80. As a result, the simulation image of the 3D knit on the flat table can be mapped to the image 80 side.

  FIG. 10 shows a simulation image 100 for the V neck, and FIG. 11 shows a simulation image 110 for the U neck. When the design of the neck portion is changed, the changed portion is detected by the difference portion, and 2D or 3D simulation on a flat table is re-executed with respect to the changed portion. Only the changed portion is mapped to the image 80 via the turtleneck pattern 63. The range in which mapping is performed is a portion corresponding to the pattern 62 in the case of the V neck and a portion corresponding to the pattern 61 in the case of the U neck. The image 80 is transparent. As described above, the simulation can be re-executed in a short time with respect to the design change of the neck.

  Here, a specific example has been shown for changing the design of the neck, but the same applies to the change of sleeves and length, the presence or absence of pockets, and the like. You can also add or change organizational patterns in the same way. In the embodiment, the pattern wearing state was simulated in order to speed up the initial simulation. However, the design of the turtleneck in FIG. 9 may be first simulated to obtain an image 90, and a 2D image of a U neck or a V neck or a 3D image in a non-wearing state may be mapped to this. Then, the image 90 in FIG. 9 is made transparent within the range that has not been mapped.

In the embodiment, the following effects can be obtained.
(1) Since the pattern wearing state is simulated and the knit simulation image is mapped to this, the wearing state of the knit garment can be simulated in a short time.
(2) If the design of the knit garment is changed, only the changed part can be re-executed with 2D or 3D simulation on a flat table, and mapping can be executed again. it can.
(3) For this reason, it is possible to respond to design changes in a short time for parts that are frequently changed, such as the neck, sleeve length, and body length.
(4) Similarly, it is possible to respond to the addition of organizational patterns in a short time.

The figure which shows the hardware constitutions of the dressing simulation apparatus of an Example. In the block diagram of the wearing simulation of the embodiment, the input / output is omitted. The flowchart which shows the first half of the wearing simulation method of an Example The flowchart which shows the second half of the wearing simulation method of an Example The figure which shows the dressing simulation program of an Example The figure which shows three patterns of a turtleneck, V neck, and U neck The figure which shows the 2D knit simulation image of the turtleneck, V neck and U neck The figure which shows the wearing condition of the garment to the pattern of the turtleneck The figure which shows the wearing state of the knit garment of the turtle neck The figure which shows the wearing condition of the knit garment of V neck The figure which shows the wearing condition of the knit garment of U neck

Explanation of symbols

2 Dressing simulation device 4 Main bus 6 Graphic bus 8 CPU
10 General-purpose memory 11 Manual input 12 Color monitor 13 Color printer 14 Input / output 15 Disk
16 GPU
18 GPU memory 20 Knit design unit 21 Data conversion unit 22 Pattern creation unit 23 Additional pattern storage unit 25 Knit simulation unit 26 Pattern simulation unit 28 Memory 30 Difference unit 32 Mapping unit 33 Knit 3D simulation unit 34 Human body model storage unit 50 Dressing simulation program
51 Knit design instruction 52 Data conversion instruction 53 Pattern creation instruction 54 Knit simulation instruction 55 Pattern 3D simulation instruction 56 Mapping instruction 57 Difference instruction
61 U-neck pattern 62 V-neck pattern 63 Turtle neck pattern 64 Neck pattern 71 U-neck knit simulation image 72 V-neck knit simulation image 73 Turtleneck knit simulation image 80 Simulation images 90 to 110 Simulation image

Claims (7)

In a device for three-dimensionally wearing a knit garment design to a model on a computer,
3D simulation means for creating a transparent 3D image simulating a state in which the model is worn with data obtained by adding a part having a predetermined shape that does not exist in the design to a specific location of the design ;
When the specific part of the design is changed, at least for the design change part, a garment image creation means for creating an image of the knit garment before the model is worn ,
A wearing simulation apparatus, comprising: mapping means for mapping the created knit garment image on the 3D image. A pattern creation means for creating, as the data, a part in which the part having the predetermined shape is added to the specific portion of the pattern having a shape corresponding to the design of the knit garment,
The 3D simulation means creates a transparent 3D image that simulates a state in which the model is worn on the pattern, and the garment image creation means creates an image of the entire knit garment,
The mapping means maps an image of the entire knit garment on the 3D image of a pattern and on a portion excluding the added part,
The garment image creation means recreates a knit garment image at least for the design change part, and re-maps the recreated knit garment image onto the 3D image of the pattern by the mapping means. The wearing simulation apparatus according to claim 1, wherein: 3. The wearing simulation apparatus according to claim 2, wherein the specific part is a neck part of a knit garment, and the part having the predetermined shape is a part for changing a neck design to a turtleneck. 3. The wearing simulation apparatus according to claim 2, wherein the specific part is a sleeve of a knit garment, and the part having the predetermined shape is a part for changing the sleeve design to a long sleeve. When the organization pattern is edited with the design,
The knit garment image is re-created for the tissue pattern edited at least by the garment image creating means, and the re-created knit garment image is re-mapped on the 3D image of the pattern by the mapping means. The wearing simulation apparatus according to claim 2, wherein the wearing simulation apparatus is characterized. In a method for three-dimensionally wearing a knit garment design to a model on a computer,
Create a transparent 3D image that simulates a state in which the model is worn with data in which a part of a predetermined shape that does not exist in the design is added to a specific part of the design ,
When the specific part of the design is changed, at least for the design change part, create an image of the knit garment before the model is worn ,
A dressing simulation method, wherein the created knit garment image is mapped onto the 3D image. In a program executed by a computer in order to simulate a state in which a model is three-dimensionally wearing a knit garment design,
In the computer,
Creating a transparent 3D image that simulates a state in which the model is worn with data in which a part having a predetermined shape that does not exist in the design is added to a specific part of the design ;
When the specific part of the design is changed, at least for the design change part, creating an image of the knit garment before the model is worn ;
An image of knit garment created, step of mapping on the 3D image, wearing simulation method characterized by executing the city.