KR20210021898A - Methode and apparatus of grading clothing including subsidiiary elements - Google Patents

Abstract

According to one embodiment, provided are a method for grading clothing including a subsidiary material element and a device thereof. The method comprises the steps of: calculating 3D transformation information between a 3D original avatar and a 3D target avatar; calculating 2D transformation information of a 2D pattern corresponding to the original clothing worn on the 3D original avatar based on the 3D transformation information; determining grading information for grading a 2D pattern to correspond to the 3D target avatar based on the 2D transformation information; identifying at least one subsidiary material element included in the original clothing; extracting at least one polygon matching at least one subsidiary material element among a plurality of polygons modeling the 2D pattern; and grading information of the at least one subsidiary material element based on the grading information of the at least one polygon.

Description

TECHNICAL FIELD The method and apparatus for grading clothing including subsidiary material elements TECHNICAL FIELD

Embodiments relate to a method and apparatus for grading a garment including subsidiary material elements.

Clothes appear three-dimensional when worn by a person, but are actually two-dimensional because they correspond to a combination of fabric pieces cut according to a two-dimensional pattern. Since the fabric used for the clothing is flexible, its appearance can change from moment to moment depending on the shape or movement of the wearer's body. For example, due to gravity, wind, or collision with the body, the worn garment may run down, wrinkle and fold.

Grading refers to a work of equally expanding or reducing a pattern of one size produced by draping or planar drafting. For example, if the size or pose between the source avatar and the target avatar is different, based on the source avatar, not only the costume but also the subsidiary material elements of the costume are automatically added according to the various sizes and poses of the target avatar. A method of grading is required.

According to an embodiment, a virtual including subsidiary elements designed to fit the size of the transformed target avatar by automatically changing the position and size of the subsidiary element that is deformed according to the grading of the 2D pattern. Costume can be implemented.

According to an embodiment, as the size of the two-dimensional pattern is automatically deformed by grading, the point input at the time of editing by the user is moved together, so that automatic grading of clothes and subsidiary materials is performed without a new designation of the position of the subsidiary material element. You can do it.

According to an embodiment, subsidiary material elements such as buttons, buttonholes, rubber bands, zippers, stitches, and piping may be automatically graded along the outline of a two-dimensional pattern.

According to an embodiment, a method of grading a garment including a subsidiary material element includes: calculating 3D strain information between a 3D original avatar and a 3D target avatar; Calculating 2D transformation information of a 2D pattern corresponding to the original clothing worn on the 3D original avatar based on the 3D transformation information; Determining grading information for grading the 2D pattern to correspond to the 3D target avatar based on the 2D transformation information; Identifying at least one subsidiary material element included in the original clothing; Extracting at least one polygon matching the at least one subsidiary material element from among a plurality of polygons modeling the 2D pattern; And grading the at least one subsidiary material element based on the at least one polygonal grading information.

The at least one subsidiary element may include a first type of subsidiary element corresponding to a graphic attribute; A second type of subsidiary element corresponding to the edit attribute; And at least one of a third type of subsidiary material element corresponding to a line attribute.

The 2D pattern includes a plurality of pattern pieces, and each of the plurality of pattern pieces is a polygon mesh based on the body shape of the 3D original avatar-the polygon mesh includes the plurality of polygons. Can be modeled.

The extracting of the at least one polygon may include extracting at least one polygon matching the at least one subsidiary element from among a plurality of polygons modeling the 2D pattern for each type of the subsidiary element. have.

When the subsidiary material element is of the first type, the extracting of the at least one polygon may include forming at least one graphic layer having the shape of the at least one subsidiary element on the polygonal mesh of the two-dimensional pattern. step; And extracting at least one polygon matching the at least one sub-material element by matching a vertex of the polygon mesh on which the at least one graphic layer is formed and a texture coordinate of the sub-material element. I can.

The at least one graphic layer may include at least one of a graphic image, a normal map, and a color layer.

The grading of the at least one subsidiary element may include grading the at least one subsidiary element by changing at least one of the position and size of the at least one graphic layer based on the at least one polygonal grading information. Can include.

When the subsidiary material element is of the second type, the extracting of the at least one polygon may include setting at least one first point for fixing the 2D pattern; Displaying a pin image at the first point; Inputting a barycentric coordination corresponding to the pin image on the polygonal mesh of the two-dimensional pattern; And extracting at least one polygon matching the at least one subsidiary material element from among the plurality of polygons based on the coordinates.

The grading of the at least one sub-material element may include deforming a polygonal mesh of the sub-material element based on the grading information of the at least one polygon; Calculating deformed coordinates corresponding to the pin image on the deformed polygonal mesh; Displaying the pin image on the deformed coordinates and setting a second point for fixing at the deformed coordinates; And grading the at least one subsidiary material element from the deformed polygonal mesh based on the second point.

When the subsidiary material element is of the third type, the extracting of the at least one polygon may be performed in the polygonal mesh of the pattern piece to which the subsidiary material element is applied among the 2D patterns, based on the grading information of the at least one polygon. It may include the step of extracting the at least one polygon by parameterizing the subsidiary material element.

The grading of the at least one subsidiary element may include grading the at least one subsidiary element for each type of the at least one subsidiary element based on the at least one polygonal grading information.

The grading of the at least one subsidiary material may include maintaining at least one of a curvature of an outline in the 2D pattern and a length ratio of a sewing line in the 2D pattern based on the grading information of the at least one polygon. It may include the step of grading one subsidiary material.

The calculating of the 3D transformation information may include calculating the 3D transformation information by mapping transformations between the 3D original avatar and the 3D target avatar in a corresponding mesh unit.

The calculating of the 3D transformation information may include determining a mapping relationship between a transformation part in which transformation exists between the 3D original avatar and the 3D target avatar and a pattern piece of the 2D pattern corresponding to the transformation part; And calculating the 3D transformation information based on the mapping relationship.

The calculating of the 2D transformation information may include calculating the 2D transformation information in a tangent direction to the curve of the 2D pattern when the subsidiary material element is applied to the curve of the 2D pattern.

The method for grading a garment including the subsidiary material element comprises: receiving a group setting for a button and a button hole among the at least one subsidiary material element; And a distance from the outline of the 2D pattern to the button hole set as the button and the group, a start position and an end position at which the button hole is created in the 2D pattern, a direction in which the button hole is created in the 2D pattern, In the step of receiving a user selection for the subsidiary material element including at least one of the number of button holes generated in the two-dimensional pattern, an interval between the button holes, the attribute of the button holes, and the style of the button holes It may further include at least one.

The garment grading method including the subsidiary material element applies the at least one subsidiary material element graded by the at least one polygonal grading information to the two-dimensional pattern graded by the at least one polygonal grading information. It may further include a step.

The grading of the at least one sub-material element may include determining whether the at least one sub-material element is a type requiring scaling; Determining whether there are predetermined standards of the at least one subsidiary material element; And selecting one of the predetermined standards based on the scaled size of the subsidiary material element according to the determination results.

The method of grading a garment including the subsidiary material element may further include receiving a setting for whether to apply the grading for each type of the at least one subsidiary material element.

According to an embodiment, an apparatus for grading a garment including a subsidiary material element includes: a user interface for receiving a user's selection of a 3D original avatar, a 3D target avatar, and at least one subsidiary material element; Calculate 3D transformation information between the 3D original avatar and the 3D target avatar, and based on the 3D transformation information, 2D transformation information of a 2D pattern corresponding to the original clothing worn on the 3D original avatar Calculating, based on the 2D transformation information, determining grading information for grading the 2D pattern to correspond to the 3D target avatar, identifying at least one subsidiary material element included in the original clothing, and the 2 A processor for extracting at least one polygon matching the at least one sub-material element from among a plurality of polygons modeling a dimensional pattern, and grading the at least one sub-material element based on grading information of the at least one polygon; And an output device configured to output a result of applying the at least one subsidiary material element graded by the at least one polygonal grading information to the 2D pattern graded by the at least one polygonal grading information.

According to one side, a virtual costume including a subsidiary element designed to fit the size of the transformed target avatar by automatically changing the position and size of the subsidiary element that is deformed according to the grading of the 2D pattern without any additional work on the subsidiary element. Can be implemented.

According to one side, as the size of the 2D pattern is automatically deformed by grading, the point entered at the time of editing by the user is moved together, and automatic grading of the clothing and subsidiary materials is performed without a new designation of the position of the subsidiary material element. can do.

According to one side, subsidiary material elements such as buttons, button holes, rubber bands, zippers, stitches, and piping may be automatically graded along the outline of the two-dimensional pattern.

1 is a flowchart illustrating a method of grading a garment including subsidiary material elements according to an exemplary embodiment.
2 is a diagram for describing a method of calculating 3D deformation information according to an exemplary embodiment.
3 is a view for explaining a method of transforming a polygon of an original garment into a polygon of a target garment, according to an exemplary embodiment.
4 is a diagram for describing a method of calculating 2D deformation information of a 2D pattern according to an exemplary embodiment.
5 is a diagram for describing a method of determining grading information according to an embodiment.
6 to 13 are views for explaining a method of grading sub-material elements according to types of sub-material elements according to embodiments.
14 is a block diagram of an apparatus for grading clothes including subsidiary material elements according to an exemplary embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes may be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It is to be understood that all changes, equivalents, or substitutes to the embodiments are included in the scope of the rights.

The terms used in the examples are used for illustrative purposes only and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

In addition, in the description with reference to the accompanying drawings, the same components are assigned the same reference numerals regardless of the reference numerals, and redundant descriptions thereof will be omitted. In describing the embodiments, when it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the embodiments, the detailed description thereof will be omitted.

1 is a flowchart illustrating a method of grading a garment including subsidiary material elements according to an exemplary embodiment. Referring to FIG. 1, a garment grading apparatus (hereinafter,'grading apparatus') including a subsidiary material element according to an exemplary embodiment calculates 3D strain information between a 3D original avatar and a 3D target avatar ( 110). Hereinafter, the'original avatar' may correspond to a costume to be graded, that is, a virtual 3D object on which the original costume is worn. The'target avatar' may correspond to a virtual 3D object having a body size corresponding to the target costume to be newly created by transforming the original costume.

The original avatar and/or the target avatar may include, for example, body dimensions, position coordinates of each body part, and feature points. 'Features' may correspond to points on the 3D avatar that become main positions when the virtual clothes are worn on the 3D avatar. Feature points are, for example, both arms, both wrists, left and right torso, both shoulders, head, neck, both legs, left and right lower body, both ankles, armpits, groin, pelvis, hips, belly, chest, both hands of the 3D avatar. It may correspond to at least one of both feet, both elbows, both knees, both fingertips, between both fingers, the back of both hands, both insteps, both toe ends, and both heels.

The original avatar and/or the target avatar may be modeled as, for example, a polygon mesh of a unit figure as shown in FIG. 3 below. In some cases, the unit figure may be a three-dimensional polyhedron (for example, a tetrahedron). Hereinafter, for convenience of explanation, it is assumed that the unit figure included in the mesh is a polygon, and in particular, it is a triangle. The mesh constituting the original avatar will be referred to as a'first mesh', and a triangle included in the first mesh will be referred to as a'first triangle'. In addition, the mesh constituting the target avatar will be referred to as a'second mesh', and a triangle included in the second mesh will be referred to as a'second triangle'.

The grading apparatus may calculate 3D transformation information by mapping transformations between the 3D original avatar and the 3D target avatar in units of corresponding meshes, for example. Here, the '3D transformation information' may be understood as a degree of transformation equal to how much each body part of the original avatar is transformed in the target avatar. The grading apparatus may calculate 3D deformation information based on, for example, a unit triangle constituting a mesh of the avatar. Here, the'unit triangle' may correspond to, for example, a first triangle constituting the first mesh of the original avatar and/or a second triangle constituting the second mesh of the target avatar. In other words, the grading apparatus may calculate 3D deformation information based on the difference between the first triangle and the second triangle. A method of calculating the 3D deformation information by the grading apparatus will be described in detail with reference to FIG. 2 below.

The grading apparatus calculates 2D transformation information of a 2D pattern corresponding to the original clothes worn on the 3D original avatar based on the 3D transformation information (120). The'original costume' is a costume worn on the 3D original avatar, and may correspond to a 3D virtual costume. A'target costume' is a costume worn on a 3D target avatar and may correspond to a virtual 3D costume similarly. In an embodiment, the original clothing and the target clothing may be modeled as a polygonal mesh in which a plurality of vertices are connected to each other. Hereinafter, a mesh constituting the original garment will be referred to as a'third mesh', and a triangle included in the third mesh will be referred to as a'third triangle'. In addition, a mesh constituting the target garment will be referred to as a'fourth mesh', and a triangle included in the fourth mesh will be referred to as a'fourth triangle'.

In one embodiment, the size of a triangle of a mesh (for example, a third mesh or a fourth mesh) constituting a 3D virtual garment may be modeled differently for each part according to the degree of delicacy of movement when simulated, and all are the same. You may.

In general,'draping' refers to a technique of creating a design by directly applying a cloth to a body, or completing a costume in three dimensions by cutting a dart or joint of a predetermined design. In the present specification,'wearing' may be understood as a process of putting a 3D clothing object on a 3D avatar by combining pattern pieces of a 2D pattern or a 2D pattern by a computer program.

The body type of the original avatar can be classified as a feature that appears in the physique according to the height and/or weight, for example, skinny body, standard body, upper body obesity, lower body obesity, upper and lower body obesity, skinny obesity, etc. It may include. The body shape of the original avatar may be determined based on, for example, a body size of a subject who will wear the original costume produced by a two-dimensional pattern or an average person's body size according to race, age, and/or gender.

The three-dimensional clothes, such as the original clothes and the target clothes, may be composed of one two-dimensional pattern including pattern pieces corresponding to each body part. The 2D pattern according to an exemplary embodiment may be a virtual 2D pattern modeled as a set of a plurality of triangles as shown in 510 and 530 of FIG. 5 to be described later for simulation of 3D virtual clothes. The 2D pattern includes a plurality of pattern pieces, and each of the plurality of pattern pieces may be modeled as a polygonal mesh based on the body shape of the 3D original avatar. In this case, the polygon mesh may include a plurality of polygons.

The mesh according to the embodiments may be modeled in various ways. For example, vertices of a polygon included in the mesh are point masses, and sides of the polygon may be expressed as springs having elasticity connecting the masses. Accordingly, the 2D pattern according to an embodiment may be modeled by, for example, a mass-spring model. Here, the springs may have resistance values for, for example, stretch, shear, and bending according to the physical properties of the fabric to be used. Alternatively, the mesh may be modeled with a strain model. The polygon included in the mesh may be modeled as a triangle, or may be modeled as a polygon of more than a square. In some cases, when a 3D volume needs to be modeled, the mesh may be modeled as a 3D polyhedron.

The vertices included in the mesh may move according to the action of an external force such as gravity and an internal force of stretching, twisting, and bending. If the external force and the internal force are calculated and the force applied to each vertex is obtained, the displacement and movement speed of each vertex can be obtained. And it is possible to simulate the movement of the virtual garment through the movement of the vertices of the polygon of the mesh at each time step. When a two-dimensional pattern made of a polygonal mesh is worn on a three-dimensional avatar, a natural-looking three-dimensional virtual garment based on the laws of physics can be implemented.

During grading, the volume or shape between the original avatar and the target avatar is different, but, for example, a connection relationship between meshes constituting each avatar and/or the number of triangles constituting the mesh may be the same.

Hereinafter, for convenience of description, the two-dimensional pattern constituting the original costume will be referred to as “original pattern”, and the two-dimensional pattern constituting the target costume will be referred to as “target pattern”. The 2D pattern may include a plurality of pattern pieces. The mesh constituting the original pattern will be referred to as a'fifth mesh', and a triangle included in the fifth mesh will be referred to as a'fifth triangle'. In addition, a mesh constituting the target pattern is referred to as a'sixth mesh', and a triangle included in the sixth mesh is referred to as a'sixth triangle'. In this case, the location information of a triangle included in each mesh may correspond to location information of vertices of a triangle included in each mesh, for example. Alternatively, the location information of a triangle included in each mesh may correspond to, for example, location information of a center of gravity of a triangle included in each mesh. A method of calculating the 2D deformation information of the 2D pattern by the grading apparatus will be described in detail with reference to FIGS. 3 to 4 below.

The grading apparatus determines grading information for grading the 2D pattern to correspond to the 3D target avatar based on the 2D transformation information calculated in step 120 (130). Here,'grading' refers to a method of generating pattern(s) of different size(s) based on a pattern of one size originally. The newly created target pattern should be designed to fit the target avatar. To this end, as the original avatar is transformed into the size of the target avatar, the size of the original pattern must be transformed into the size of the target pattern. However, since the size of the original avatar is changed for each body part, if this is not considered, an accurate target pattern suitable for the target avatar cannot be generated.

In one embodiment, the size of the original pattern is also changed for each body part in consideration of the fact that the size of the original avatar is changed for each body part, and it is applied to the target avatar and the target pattern of the target avatar, so that a more accurate target for the target avatar. Pattern pieces of patterns can be produced.

The grading method according to an embodiment may automatically grade a pattern of the target clothing so that the original clothing worn on the original avatar fits a target avatar having a different size and/or body shape. A method of determining the grading information by the grading apparatus will be described in detail with reference to FIG. 5 below.

The grading device identifies at least one subsidiary material element included in the original garment (140). Here,'at least one subsidiary material element' is used when editing subsidiary materials attached to a two-dimensional pattern or a two-dimensional pattern in addition to various subsidiary materials such as buttons, button holes, graphic images, zippers, etc. attached to a two-dimensional pattern of clothes. It may include various graphic data and/or texture data.

The at least one subsidiary element is, for example, a subsidiary element of a first type corresponding to a graphic attribute, a subsidiary element of a second type corresponding to an edit attribute, and a second subsidiary element corresponding to a line attribute. It may include at least one of three types of subsidiary material elements.

The graphic attribute is an attribute that enables a subsidiary material to be transformed graphically, and the grading device must consider not only the position change but also the scaling when grading the subsidiary material having the graphic attribute. Subsidiary elements of the first type are, for example, buttons, button holes, zippers, rubber bands, stitches, in addition to materials such as patterns, colors, logos, embroidery, characters, fabrics, etc. ), binding, and piping.

Piping means, for example, sewing by rolling it along an edge (border) in a women's bag, and both standardized and/or non-standardized properties are possible. The length and width of the zipper can be freely deformed graphically, but can be standardized in practice. Accordingly, the grading apparatus may automatically select and recommend the size of the most similar standard when grading the zipper, or may change the size to the size of the most similar standard.

Buttons and buttonholes may be set as a group by a user, for example. For example, suppose that 5 buttons and 5 button holes are attached to the front panel pattern piece of a two-dimensional pattern. In this case, five buttons may be set as one button group, and five button holes may be set as one button hole group. At this time, each button hole is displayed as a graphic image on a two-dimensional pattern, and thus may correspond to a first type of subsidiary material element having a graphic property. Also, since the buttonhole group or the button group is arranged along the outline of the 2D pattern, it may correspond to a third type of subsidiary material element corresponding to a line property. As such, the subsidiary material element may correspond to one type or may correspond to a plurality of types.

The zipper is indicated by both zipper lines on the two-dimensional pattern, and the length of the zipper line can be parameterized, for example, 0.9 times or 0.7 times the length of the two-dimensional pattern.

During subsequent grading, the grading apparatus calculates scaling in a direction perpendicular to the zipper line using, for example, a polygon mesh with the zipper line of the zipper as a subsidiary material as one side, and averages the scaling results to determine the width. . For example, when a zipper standard exists, the grading apparatus may grade the zipper, which is a subsidiary material, by a zipper having a standard closest to the zipper length and width calculated by scaling in a direction perpendicular to the zipper line.

The editing property may correspond to a property temporarily set for editing of a pattern piece. The second type of subsidiary element may include, for example, a pin, a trim, a tack, a measure, and a baseline setting.

Pins can be represented as a two-dimensional pattern or a point on a piece of pattern. When a user sets a pin on a two-dimensional pattern or pattern piece, the grading apparatus may move the coordinates of a polygon of a mesh matching the pin during grading.

Trim allows a 3D object to be placed at a point on the 3D garment. When trimming, the junction point may not be the center of the 3D object or may be multiple points.

The hour hand can be fixed by temporarily connecting two selected points on the 3D garment. The hour hand may be performed by the user selecting points through a pin or the like. The grading apparatus may move a polygon of menumbers corresponding to each selected point by the hour hand.

The maser may measure the length of a baseline consisting of two or more consecutive points on a 3D garment or a 2D pattern.

The button group can set or edit the positions of buttons and button holes at a point on the 3D clothing. In the case of the editing attribute, for example, only the position change can be considered when grading the subsidiary material.

The line attribute may correspond to an attribute set by being mediated on a line of a pattern piece of a two-dimensional pattern. The third type of subsidiary element may include, for example, a group of buttons and buttonholes, zippers, bindings, piping, and the like. The button group and/or the button hole group may correspond to the third type of subsidiary material element corresponding to the line property, since the button group and/or the button hole group have a certain interval from the outline of the 2D pattern and can be deformed in the tangent direction of the outline mesh of the 2D pattern. have. In this case, the button group and/or the button hole group may be scaled equally or differently according to a single scale axis.

The at least one subsidiary material element may be input by a user through, for example, a user interface of the grading apparatus (see 1410 of FIG. 14). The grading apparatus may receive, for example, a group setting for a button and a button hole among at least one subsidiary material element through a user interface. In addition, the grading device includes the distance from the outline of the 2D pattern to the button hole, the starting and ending positions of the button hole in the 2D pattern, the direction in which the button hole is created in the 2D pattern, and the button created in the 2D pattern. A user selection for a subsidiary material element including at least one of the total number of holes, an interval between button holes, attributes of button holes, and styles of button holes may be input.

The grading apparatus extracts at least one polygon matched with at least one subsidiary material element from among a plurality of polygons modeling a 2D pattern (150 ). The grading apparatus may extract at least one polygon matching at least one subsidiary element from among a plurality of polygons modeling a 2D pattern for each type of subsidiary element. A method of extracting at least one polygon for each type of sub-material element by the grading apparatus will be described in detail with reference to FIGS. 6 to 13 below.

The grading apparatus grades at least one subsidiary material element based on the at least one polygonal grading information extracted in step 150 (160 ). The grading apparatus may grade at least one subsidiary element for each type of at least one subsidiary element based on, for example, grading information of at least one polygon. In this case, the grading information of the at least one polygon may correspond to the grading information of the polygon matched to the subsidiary material element among the grading information of the 2D pattern determined in step 130.

For example, when the sub-material element is in a curve of a two-dimensional pattern, the grading apparatus may calculate deformation information in a tangential direction of the curve, and adjust the width of the two-dimensional pattern to which the sub-material element is applied as an average of the deformation information.

Alternatively, the grading apparatus may grade at least one subsidiary material while maintaining at least one of a curvature of an outline in a 2D pattern and a length ratio of a sewing line in a 2D pattern based on the grading information of at least one polygon.

In step 160, the grading apparatus applies at least one subsidiary material element graded according to the grading information of at least one polygon to the two-dimensional pattern graded by the grading information of at least one polygon, and outputs the result. I can.

According to an embodiment, the grading apparatus may receive a setting for whether to apply grading for each type of at least one subsidiary material element. For example, when whether to apply grading to a subsidiary material element is set to'OFF' according to a user's setting, the grading device may maintain the original size of the subsidiary material element as it is. In this case, the grading apparatus may apply a subsidiary material element in which the size of the original is maintained to the two-dimensional pattern graded based on the grading information. Or, when whether to apply grading to the subsidiary material element is set to "ON" by the user's setting, the grading device scales the subsidiary material element, in other words, changes the size and position of the subsidiary material element according to the grading information of the 2D pattern. I can. In this case, the grading device may output a two-dimensional pattern including the sub-material element and/or a three-dimensional garment including the sub-material element by applying the sub-material element graded by the grading information to the two-dimensional pattern graded by the grading information. I can. Depending on the embodiment, the grading apparatus may receive a setting on whether to apply the curvature of the 2D pattern in addition to the size and position of the subsidiary material element during grading.

2 is a diagram for describing a method of calculating 3D deformation information according to an exemplary embodiment. Referring to FIG. 2A, a body part of the 3D target avatar 230 corresponding to the body part of the 3D original avatar 210 is shown. In addition, referring to FIG. 2B, the first triangle 215 of the first mesh constituting the 3D original avatar 210 and the second triangle of the second mesh constituting the 3D target avatar 230 235 is shown.

In an embodiment, a deformation rate between the body part of the original avatar 210 and the body part of the target avatar 230 may be defined in units of triangles constituting the mesh of each avatar. A method of calculating how much each triangle (eg, the first triangle 215) of the original avatar 210 is deformed in the target avatar 230 may correspond to avatar fitting.

In the grading apparatus according to an embodiment, three points of the first triangle 215 of the original avatar 210 are determined by determining which feature point of the target avatar 230 is fitted to a specific feature point of the original avatar 210. ), you can see where you are moving to. The grading apparatus may calculate a 3D transformation matrix representing the degree of deformation of the triangle based on the position on the target avatar 230 where the three points of the first triangle 215 of the original avatar 210 have moved. have.

,

,

)가 주어졌다고 하자.For example, the positions (0, 1, 2) of the three points of the first triangle 215 of the original avatar 210 and the positions of the three points of the second triangle 235 of the target avatar 230 (

,

,

Suppose) is given.

와 제2 삼각형(235)의 세 점들에 기초한 제2 사면체

를 구성할 수 있다. The grading apparatus may form a tetrahedron by expanding the first triangle 215 and the second triangle 235. The grading device is a first tetrahedron based on three points of the first triangle 215

And a second tetrahedron based on three points of the second triangle 235

Can be configured.

는

와 같이 나타내고, 제2 사면체

는

와 같이 나타낼 수 있다. 이 때, 제1 사면체

의 한 점 3과 제2 사면체

의 한 점

은 각 삼각형의 중점에서

만큼 수직으로 떨어진 곳에 위치시킬 수 있다.First tetrahedron

Is

Represented as, and the second tetrahedron

Is

It can be expressed as At this time, the first tetrahedron

Point 3 and 2 tetrahedron

One point of

Is at the midpoint of each triangle

It can be located vertically apart.

와 제2 삼각형(235)에 대응하는 사면체

가 주어진 경우, 그레이딩 장치는 제1 사면체

와 제2 사면체

간의 변형 정도를 나타내는 변환 매트릭스

를 아래의 수학식 1과 같이 구할 수 있다. In this way, the first tetrahedron corresponding to the first triangle 215

And the tetrahedron corresponding to the second triangle 235

If is given, the grading device is the first tetrahedron

And the second tetrahedron

Transformation matrix indicating the degree of deformation between

Can be obtained as in Equation 1 below.

에 의해 원본 아바타와 타겟 아바타 간의 3차원 변형 정보를 산출할 수 있다. Grading device is a transformation matrix

Thus, 3D transformation information between the original avatar and the target avatar can be calculated.

According to an embodiment, the grading apparatus uses a correspondence map between the first mesh of the original avatar 210 and the second mesh of the target avatar 230 to generate 3 between the original avatar 210 and the target avatar 230. Dimensional transformation information can also be calculated. In this case, the corresponding map may be calculated proportionally based on feature points such as the head, toe, and arm of each avatar.

According to an embodiment, the grading apparatus may obtain a corresponding map by wearing a virtual reference garment having the same mesh topology on the original avatar 210 and the target avatar 230. The virtual reference clothing may be a virtual clothing worn in close contact with the avatar's body. The correspondence map includes information indicating triangle(s) of the second mesh of the target avatar 230 corresponding to the triangle(s) of the first mesh of the original avatar 210. Since the original avatar 210 and the target avatar 230 are dressed with a virtual reference costume of the same mesh topology, the second mesh of the target avatar 230 corresponding to the triangle(s) of the first mesh of the original avatar 210 Triangle(s) can be identified. For example, unique identifiers may be given to triangles included in the virtual reference clothing, and the identifiers of triangles included in the virtual reference clothing are the original avatar 210 and the target avatar 230 in which the virtual reference clothing is worn. Since it does not change even afterwards, a correspondence relationship between the triangle of the original avatar 210 and the triangle of the target avatar 230 having the same identifier can be easily identified.

The grading apparatus according to an embodiment may determine which body part of the original avatar 210 is mapped to each part of the original pattern constituting the original costume. The grading apparatus may determine a mapping relationship by searching, for example, a mapping list that maps triangles of the mesh of the original avatar 210 close to each triangle of the mesh constituting the original clothing. Here, the'mapping relationship' may indicate, for example, to which body part of the original avatar 210 each part of the virtual 3D clothing pattern corresponding to the original avatar 210 is mapped. When the original costume is worn on the original avatar 210, the grading apparatus may determine a mapping relationship between the target pattern and the body part of the original avatar 210 among the two-dimensional original patterns constituting the original costume.

The grading apparatus determines a mapping relationship between the transformed portion where the deformation exists between the three-dimensional original avatar 210 and the three-dimensional target avatar 230 and the pattern pieces of the two-dimensional pattern corresponding to the deformation portion, and based on the mapping relationship, 3D transformation information can be calculated.

More specifically, the grading apparatus may determine a mapping relationship between the original pattern and the target pattern.

For example, assume that the target pattern is a sleeve pattern corresponding to the right arm of the original avatar 210, and more specifically, the right shoulder. The grading apparatus may search for first triangles adjacent to each of the triangles constituting the mesh of the sleeve pattern of the original clothing among the first triangles constituting the first mesh of the original avatar 210. In this case, the grading apparatus may search for adjacent first triangles within a predetermined distance for each of three points of triangles constituting the mesh of the sleeve pattern. The grading apparatus may register adjacent first triangles in a mapping list corresponding to the sleeve pattern. The mapping list corresponding to a specific triangle of the original clothing may include, for example, one first triangle or a plurality of first triangles. According to an embodiment, the mapping list corresponding to a specific triangle of the original clothing may include first triangles in a certain area and/or first triangles in a certain direction. The grading apparatus may determine the mapping relationship based on the body part ('right shoulder part') of the original avatar 210 corresponding to the mapping list. The grading apparatus may convert a two-dimensional original pattern constituting the original garment into a two-dimensional target pattern constituting the target garment based on the 3D transformation information and the mapping relationship.

Thereafter, the grading apparatus determines grading information for grading the 2D pattern to correspond to the 3D target avatar 230 based on the 2D transformation information, and the original clothing is worn on the target avatar 230 according to the grading information. It can be transformed into a three-dimensional target costume. A method of converting the original clothing into the target clothing by the grading apparatus according to the grading information will be described in detail with reference to FIGS. 3 to 5 below.

In addition, the grading device deforms the portion of the target pattern mapped to the portion by the body portion-specific strain rate of the target avatar 230, while the entire target pattern of the target garment is the outline curvature and/or sewing line of the original pattern. The target pattern can be graded through an optimization process that maintains the length ratio and the like.

3 to 4 are diagrams for explaining a method of calculating 2D deformation information of a 2D pattern according to an exemplary embodiment. Referring to FIG. 3, a process of transforming a polygon of a mesh constituting an original garment into a polygon of a mesh constituting a target garment according to an embodiment is illustrated.

The grading apparatus is based on the 3D transformation information from the first triangles of the body part of the original avatar 310 to the second triangles of the body part of the target avatar 320, The third triangle may be transformed into a fourth triangle of the target garment 340.

According to the principle of grading, clothes can follow the size change of adjacent avatar body parts. Accordingly, the grading apparatus according to an embodiment maps (eg, adjacent) the deformation of the triangle of the mesh constituting the original cloth 330 to the third triangle of the third mesh constituting the original cloth 330 It may be calculated based on the strain rates of the first triangles of the body part of the original avatar 310.

로 표현되는 원본 아바타(310)와 타겟 아바타(320) 간의 3차원 변형 정보에 해당할 수 있다. 이때, 원본 아바타(310)와 타겟 아바타(320) 간의 변형률

및

은 도 3에 도시된 것과 같이 원본 의상(330)과 타겟 의상(340) 간의 변형률

로 적용될 수 있다.The deformation rates of the first triangles of the body part of the original avatar 310 are converted to the matrix as described in Equation 1 above.

It may correspond to 3D transformation information between the original avatar 310 and the target avatar 320 represented by. At this time, the strain rate between the original avatar 310 and the target avatar 320

And

Is the strain between the original clothes 330 and the target clothes 340 as shown in FIG. 3

Can be applied as

는 아래의 수학식 2와 같이 제1 삼각형들의 변형률들

의 평균에 해당할 수 있다. For example, when one of the first triangles constituting the first mesh of the original avatar 310 _{is expressed as a s} , the second triangle constituting the second mesh of the target avatar 320 a _t can be expressed as T _a xa _s. In addition, when one of the third triangles constituting the third mesh of the original clothing 330 _{is expressed as c s , the fourth triangle c t} constituting the fourth mesh of the target clothing 340 is It can be expressed as T xc _s. At this time,

Is the strains of the first triangles as shown in Equation 2 below

May correspond to the average of

라고 하자. For example, the set of first triangles of the body part of the original avatar 310 mapped to the third triangle r of the third mesh constituting the original costume 330 is

Let's say.

은 아래의 수학식 2와 같이 원본 아바타(310)의 신체 부위의 제1 삼각형들의 변형률들

의 평균으로 산출될 수 있다. In this case, the strain of the third triangle of the third mesh constituting the original garment 330

Is the strain rates of the first triangles of the body part of the original avatar 310 as shown in Equation 2 below.

Can be calculated as the average of

는 전술한 수학식 1에서 회전 강체 변환(rotation rigid transformation)을 제외한 값, 다시 말해, 스케일(scale) 변환 및 쉬어(shear) 각도 변환만을 수행한 결과에 해당할 수 있다. Here, the strain rates of the first triangles of the body part of the original avatar 310

May correspond to a value excluding rotation rigid transformation in Equation 1, that is, a result of performing only scale transformation and shear angle transformation.

In this way, the grading apparatus calculates the statistics (eg, average) of the 3D deformation information of the first triangles of the body part of the original avatar 310, and according to the statistics of the 3D deformation information of the first triangles, the original clothing ( The third triangle of the third mesh constituting 330 may be transformed into a fourth triangle of the fourth mesh constituting the target garment 340.

In one embodiment, by applying the transformation matrix of the original avatar 310 as it is to the target clothing 340, not only the transformation in the horizontal direction with respect to the original avatar 310 but also the transformation in the vertical direction is accurately reflected in the target clothing 340. Regardless of the shape of the garment, it is possible to generate accurately automatically graded target patterns.

Referring to FIG. 4A, when the third triangle 410 of the 3D original clothing is transformed into the fourth triangle 420 of the 3D target clothing, a two-dimensional original pattern corresponding to the third triangle 410 ( The relationship between the fifth triangle 430 of the fifth mesh) and the sixth triangle 440 of the two-dimensional target pattern (sixth mesh) corresponding to the fourth triangle 420 is shown.

The three-dimensional form of clothes can be deformed due to, for example, gravity, collision between clothes and clothes, fabric tension, etc., and these deformations of clothes should be reflected in the two-dimensional patterns constituting the clothes as well. A fitted two-dimensional pattern or pattern pieces of a two-dimensional pattern may be generated. Accordingly, in an embodiment, the deformation of the three-dimensional shape of the garment may be applied to a two-dimensional pattern constituting the garment similarly.

이라 부르고, 기준 삼각형(450)과 타겟 패턴의 제6 삼각형(440)의 형태 변형률을 '타겟 변형률'

이라 부르기로 하자. 여기서, 제5 삼각형(430)은 제3 삼각형(410)에 대응하는 원본 패턴(제5 메쉬)의 삼각형에 해당할 수 있다. 또한, 제6 삼각형(440)은 제4 삼각형(420)에 대응하는 타겟 패턴(제6 메쉬)의 삼각형에 해당할 수 있다. 또한, 기준 삼각형(450)은 2차원 패턴 상에서 기준이 되는 가상의 삼각형에 해당하며, 예를 들어, 아무런 외력이 작용하지 않는 이상적인 상태의 삼각형에 해당할 수 있다. 일 실시예에 따르면, 기준 삼각형은 미리 정해진 초기 크기를 가질 수 있고, 또는 설계에 따라 각 패턴의 단위 삼각형의 평균 크기를 가질 수도 있다.For example, the shape strain between the reference triangle 450 and the fifth triangle 430 of the original pattern is'original strain'.

And the shape strain of the reference triangle 450 and the sixth triangle 440 of the target pattern is referred to as'target strain'.

Let's call it this. Here, the fifth triangle 430 may correspond to a triangle of the original pattern (the fifth mesh) corresponding to the third triangle 410. In addition, the sixth triangle 440 may correspond to a triangle of the target pattern (sixth mesh) corresponding to the fourth triangle 420. In addition, the reference triangle 450 corresponds to a virtual triangle serving as a reference on a two-dimensional pattern, for example, may correspond to a triangle in an ideal state in which no external force acts. According to an embodiment, the reference triangle may have a predetermined initial size, or may have an average size of a unit triangle of each pattern according to a design.

Referring to FIG. 4B, a diagram for explaining a relationship between a triangle 410 or 420 constituting a three-dimensional garment and a triangle 430 or 440 constituting a two-dimensional pattern is shown.

과 타겟 변형률

은 아래의 수학식 3을 통해 계산될 수 있다. Original strain as described above

And target strain

Can be calculated through Equation 3 below.

Here, U is a 2 x 3 matrix, and the size of the first column vector of the matrix indicates how much scale is in the x-axis in two dimensions, and the size of the second column vector indicates how much the size of the second column vector is scaled in the y-axis. Can be indicated. In addition, the angle of the two column vectors may correspond to the shear angle.

를 계산할 수 있다. When a two-dimensional pattern is graded, a size change may occur mainly in the x-axis and y-axis directions, so the grading apparatus according to an embodiment has only the size of two column vectors, that is, a scale value, and a strain rate

Can be calculated.

로 정의할 수도 있다. 이 경우, 그레이딩 과정에서 각 의상을 구성하는 패턴의 삼각형들은 원본 변형률

에서 타겟 변형률

만큼 변형되어야 한다. According to the embodiment, the grading device includes not only the scale value but also the shear angle.

It can also be defined as In this case, the triangles of the pattern constituting each garment during the grading process are the original strain rate.

Target strain at

Must be transformed.

과 타겟 변형률

간의 비율을 2차원 변형 정보(

)라 부르기로 한다. 2차원 변형 정보는

와 같이 산출할 수 있다. 2차원 변형 정보(

)은 초기 비율

로도 표시할 수 있다. In one embodiment, the original strain

And target strain

The ratio between the two-dimensional transformation information (

). The 2D transformation information is

It can be calculated as Two-dimensional transformation information (

) Is the initial ratio

It can also be marked with.

5 is a diagram for describing a method of determining grading information according to an exemplary embodiment. Referring to FIG. 5, a process of converting an original pattern constituting an original clothing into a target pattern constituting a target clothing is illustrated based on the 2D transformation information of the 2D pattern.

The grading apparatus according to an embodiment may derive the sixth mesh candidate 530 of the 2D target pattern candidate from the fifth mesh 510 of the 2D original pattern based on an objective function that maintains the strain rate of the 2D pattern. have.

The grading apparatus may deform the entire triangular mesh constituting the 2D pattern so that the shape of the 3D clothing remains the same as possible even in the 2D pattern when the shape deformation occurs in the 3D clothing.

The grading apparatus according to an embodiment may calculate a target strain between the reference triangle and the sixth triangle candidate when, for example, the sixth triangle candidate of the sixth mesh candidate 530 of the target pattern candidate is determined. Here, the calculated target strain may correspond to a target strain candidate. The grading apparatus may determine a ratio between the original strain and the target strain candidate, that is, grading information. The grading apparatus may determine positions of points on the sixth mesh candidate 530 of the target pattern candidate to satisfy a first objective function that minimizes a difference between the 2D deformation information and the grading information.

In this way, a process of calculating the position of each point on the sixth mesh candidate 530 of the target pattern candidate to maintain the 2D strain corresponding to the triangle of the 3D garment as much as possible may be referred to as an “optimization process”. The optimization process can be expressed as Equation 4 below.

는 2차원 타겟 패턴 후보의 제6 메쉬 후보 상의 점들(예를 들어, 꼭지점들)의 위치들을 지시하는 벡터(vector)에 해당할 수 있다. here,

May correspond to a vector indicating positions of points (eg, vertices) on the sixth mesh candidate of the 2D target pattern candidate.

과 그레이딩 정보

간의 차이를 최소화하는 제1 목적 함수에 해당할 수 있다. 그레이딩 장치는 2차원 변형 정보

과 그레이딩 정보

간의 차이가 최소화되도록 타겟 패턴 후보의 제6메쉬 후보 상의 점의 위치를 계산할 수 있다. Equation 4 is two-dimensional transformation information

And grading information

It may correspond to a first objective function that minimizes the difference between. Grading device is two-dimensional deformation information

And grading information

The position of a point on the sixth mesh candidate of the target pattern candidate may be calculated so that the difference between the target pattern candidates is minimized.

The grading apparatus may obtain a solution in which the gradient of the objective function of Equation 4 is 0 by, for example, a gradient decent technique. The grading apparatus may obtain a 2D target pattern by obtaining a solution of Equation 4.

For example, when the body shape of the target avatar is smaller than that of the original avatar, the size of the target pattern is reduced overall compared to the original pattern. In this case, the outlines of the target pattern may be uneven due to a difference between the target strain of each triangle of the mesh constituting the target pattern and the target strain of the surrounding triangles. This may be due to the fact that the deformation rate of the triangles of the mesh of the target avatar adjacent to the triangle of the mesh constituting the target pattern is not continuous.

로 표시할 수 있다. The grading apparatus according to an embodiment may smoothly express the outlines of the 2D pattern in a straight line by mitigating the 2D deformation information through Equation 5 below. The two-dimensional deformation information relaxed by Equation 1 is

It can be marked with.

는 2차원 패턴의 삼각형 i 에 인접한 삼각형 j 들의 집합을 나타낸다. Where k denotes the iteration of relaxation,

Denotes a set of triangle j adjacent to triangle i of a two-dimensional pattern.

을 전술한 수학식 5를 통한 완화 과정을 거쳐 완화된 2차원 변형 정보

를 구할 수 있다. Grading device is the initial target strain

The two-dimensional deformation information relaxed through the relaxation process through Equation 5 described above.

Can be obtained.

를 구할 수 있다.Depending on the embodiment, the grading apparatus applies a moving average to points corresponding to the outlines of the 2D pattern, or the 2D transformation information that is relaxed by applying low-pass filtering.

Can be obtained.

를 수학식 4의 최적화 식에 반영하여 아래와 같은 수학식 6을 얻을 수 있다. Relaxed two-dimensional deformation information

Equation 6 below can be obtained by reflecting in the optimization equation of Equation 4.

과 완화된 2차원 변형 정보

간의 차이를 최소화하는 제2 목적 함수를 만족하도록 제6 메쉬 후보 상의 점들의 위치를 결정할 수 있다. 제2 목적 함수는 예를 들어, 수학식 6에 해당할 수 있다. The grading device is, for example, grading information

And relaxed two-dimensional deformation information

The positions of points on the sixth mesh candidate may be determined to satisfy the second objective function that minimizes the difference between the two. The second objective function may correspond to Equation 6, for example.

The grading apparatus can obtain a two-dimensional pattern having a smoother and smoother outline by Equation 6.

6 to 8 are views for explaining a method of grading a subsidiary material element when the subsidiary material element is a first type according to embodiments.

Referring to FIG. 6, according to an embodiment, a screen 610 showing an original costume and an original pattern including a graphic image of a logo (“CLO”) as a subsidiary material element of a first type, and an original costume and logo (“CLO”) ) A screen 630 showing the result of grading the graphic image to fit the target avatar is shown.

For example, it is assumed that a two-dimensional pattern 613 made of a mesh that fits the body shape of a three-dimensional original avatar, such as the screen 610, and a three-dimensional target avatar such as the subsidiary material element 615 and the screen 630, have been input. lets do it. The subsidiary element 615 may be, for example, a logo ("CLO") graphic image.

When the subsidiary material element 615 has a graphic property such as a logo, the grading device identifies the subsidiary material element 615 as a first type of subsidiary material element, and the polygonal mesh of the 2D pattern 613 as in the screen 610 A graphic layer 617 having the shape of a subsidiary material element may be formed. In this case, the graphic layer 617 may correspond to, for example, a graphic image such as a pattern or a logo, or may correspond to a normal map and a color layer.

The grading device matches the vertex of the polygonal mesh on which the graphic layer 617 is formed and the texture coordinate of the subsidiary element 635 displayed on the screen 630 to match at least one subsidiary element. You can extract polygons. In this case, the texture coordinates of the subsidiary material element 635 may be input from the user through the user interface 640 displayed at the lower right of the screen 630 or may be preset. The grading apparatus may grade the subsidiary element by equally applying the determined grading information to the subsidiary element to grade the 2D pattern 613 displayed on the screen 610 to correspond to the 3D target avatar displayed on the screen 630. . The grading apparatus may grade the sub-material element by applying the grading information of the 2D pattern determined through the above-described process to the graphic image of the logo (“CLO”) as the sub-material element. The grading apparatus may grade the sub-material element like the sub-material element 635 of the screen 630 by changing at least one of the position and size of the graphic layer 617 based on the grading information of the 2D pattern.

For example, when the first sub-material element is binding and/or piping, the grading apparatus may calculate the deformation size of the sub-material element by mesh deformation in a two-dimensional pattern instead of the graphic layer 617.

Referring to FIG. 7, according to an embodiment, a screen 710 showing an original costume and an original pattern including buttonholes, which are subsidiary materials of a first type, and a result of grading the original clothes and buttonholes according to a target avatar are shown. The illustrated screen 750 is shown.

The grading apparatus equally applies the grading information of the determined 2D pattern to the button holes in order to grade the 2D pattern 715 displayed on the screen 710 to correspond to the 3D target avatar displayed on the screen 730. ), you can grade the buttonholes.

For example, suppose that the grading apparatus grades the button holes 713 displayed on the original clothes on the left side of the screen 710 to match the target avatar, along with the screen 730. In this case, the grading apparatus may express a graphic image 757 of buttonholes, which are sub-material elements, on a polygonal mesh 755 of a two-dimensional pattern displayed on the screen 750. The grading apparatus may extract at least one polygon matching the button holes by matching the vertex of the polygon mesh in which the graphic image 757 of the button holes is expressed and the texture coordinates of the button holes. In this case, the texture coordinates of the buttonholes may be set by the user through the user interface 735 displayed on the right side of the screen 730, for example. The grading apparatus may grade the button holes by changing at least one of the positions and sizes of the button holes based on the extracted polygonal grading information.

Hereinafter, a process of setting a button group, which is an example of a subsidiary material element, and a process of grading the button group will be described with reference to FIGS. 8A to 8B.

8A to 8B, screens 810, 820, 830, 840, and 850 showing a process of setting a button group, which is a first type of subsidiary material element, according to an embodiment are shown.

For example, a user who wants to create a button group, which is a subsidiary material element, may select the button creation icon 815 from the user interface displayed at the top of the screen 810. When the button creation icon 815 is selected, 3D coordinates for setting the size of the button, etc. may be displayed on a 2D pattern like the screen 810.

When the size of the button is set, as shown on the right side of the screen 820, an outline of a 2D pattern in which the button is to be arranged may be selected.

After an outline on which a button is to be placed is selected, such as the screen 820, a user interface 835 may be displayed on the screen 830. The user can use the user interface 835 to determine the distance from the outline of the 2D pattern based on the starting point of the button (eg, 0.8 Cm), and the distance from the end of the 2D pattern to the starting position of the first button (eg. For example, 3.8 Cm), the spacing between buttons, and the total number of buttons can be entered.

When the user sets the distance between the buttons of the button group (eg, 5.9Cm) and the total number of buttons (eg, 5) through the user interface 845 displayed on the screen 840, for example , A button group according to a set value may be displayed on a two-dimensional pattern like the screen 850. In this case, the grading apparatus may generate a button hole group at a predetermined distance and interval along an outline of a corresponding two-dimensional pattern based on the positions of the buttons of the button group.

Even after the button group is displayed, the user can adjust the distance between the buttons of the button group and the total number of buttons through the user interface.

In this way, it is assumed that after a button group and/or a button hole group is generated on a two-dimensional pattern of an original garment, grading is performed on the button hole and/or the button hole group. In this case, the grading device may calculate 2D transformation information in a tangent direction to the curve of the 2D pattern, and based on the 2D transformation information, determine grading information for grading the 2D pattern to correspond to the 3D target avatar. have. The grading apparatus may grade the button group and/or the button hole group by applying the same grading information of the 2D pattern.

9 to 12 are diagrams for explaining a method of grading a subsidiary material element when the subsidiary material element is a second type according to embodiments.

Referring to FIG. 9, drawings 910 and 920 for explaining a process of grading the subsidiary material element when the subsidiary material element is a pin having editing properties temporarily set for editing a pattern piece are shown. .

The pin according to an embodiment may perform a role of fixing a specific portion of a garment or a two-dimensional pattern. The pin may fix a point of a garment or a two-dimensional pattern, or may fix a partial area.

For example, suppose that a user sets a pin as a sub-material element in a two-dimensional pattern displayed on the screen 910. When the subsidiary material element is a pin having the editing attribute, the grading apparatus sets at least one first point or first point area 915 for fixing the 2D pattern, and pins the first point or the first point area. ) Images can be displayed. The grading apparatus may input coordinates corresponding to the pin image on the polygonal mesh 925 of the two-dimensional pattern displayed on the screen 920. In this case, the coordinates corresponding to the pin image may be, for example, barycentric coordination of the vertices of the mesh corresponding to the first point area 915. The grading apparatus may extract at least one polygon matching a pin from among a plurality of polygons of a polygon mesh of a two-dimensional pattern based on the input coordinates. The grading apparatus may grade the position and size of the pin based on the grading information of at least one polygon matched with the pin.

The pin according to an embodiment may serve to fix a specific part of the garment. Pins can be used to fix a point on the garment or to fix some areas.

Referring to FIGS. 10A and 10B, drawings 1010, 1020, 1030, and 1040 for explaining a process of moving a pin and setting a pin are shown.

For example, suppose that the user selects a pin setting among the user interfaces displayed on the screen 1010 of FIG. 10A. In this case, a pin image 1011 may be displayed on a 2D pattern displayed on the screen 1010. Suppose that a user clicks on the pin image 1011 and then drags it to the location of the pin image 1013. In this case, the 2D pattern including the pin image 1011 may be moved to the position of the pin image 1013 and displayed as shown in 1015.

Also, as shown in the screen 1020, when the user clicks the pin while the simulation is stopped, the gizmo 1021 may be generated. For example, after moving using the square of the gizmo 1021 or the X, Y, and Z axes, the two-dimensional pattern can be moved to the position of the moved gizmo 1021 by simulation. The gizmo on the pin can also be used in a simulated state.

Depending on the embodiment, the pins may also be set in units of line segments. For example, suppose that the user double-clicks a point 1031 of the outline of a two-dimensional pattern as shown in the screen 1030 of FIG. 10B. In this case, the pin may be set in units of line segments corresponding to a certain segment including one point 1031 of the outline of the 2D pattern.

Alternatively, according to an embodiment, the pins may be set in units of patterns. For example, suppose that a user double-clicks a vertex 1041 of a mesh of a two-dimensional pattern like the screen 1040. In this case, pins may be set for the entire pattern piece 1043 of the mesh.

Referring to FIG. 11, screens 1110 and 1130 for explaining the process of grading the subsidiary element when the subsidiary element is a measure having an editing property temporarily set for editing a pattern piece are shown. .

When the editing attribute is selected as the sub-material element, the grading device displays the length of the baseline, as in the screen 1110 and the screen 1130, and adjusts the length ratio of the baseline according to the grading information of the 2D pattern. have.

Alternatively, for example, when connecting two fabrics of different shapes, the places where each fabric should meet each other should be marked, placed in contact with each other, and then fixed with a tack pin and then sewn, so that the sewing can be performed exactly as planned. The notch may correspond to a reference point that is marked so as not to be twisted when connecting fabrics in this way.

In the grading apparatus according to an embodiment, for example, the base line for displaying a seam allowance or a notch may be hidden as shown in the screen 1210 of FIG. 12 or displayed as the screen 1230 according to the convenience of work. can do.

13 is a diagram for explaining a method of grading a subsidiary material element when the subsidiary material element is of a third type according to exemplary embodiments. Referring to FIG. 13, screens 1310, 1320, 1330, and 1340 showing a process of arranging a zipper on a garment by a subsidiary material element according to an embodiment are shown.

The zipper may correspond to an example of a third type of subsidiary material element having a line property set by being mediated by the line of a pattern piece of a two-dimensional pattern, and the same process may be applied to binding, piping, and button groups in addition to zippers. .

For example, when the subsidiary material element is a zipper, the grading apparatus may receive a setting of a region in which the zipper is to be placed on the garment, such as the screen 1310 and the screen 1320, from the user.

When the area in which the zipper is to be placed is set, the grading device may receive settings such as the total length of the zipper, the width of the zipper, and the thickness through a user interface (not shown). When the setting of the zipper is completed on the screen 1330 of the grading apparatus, the grading apparatus may show a result of disposing the zipper on the original garment according to the user's setting, as shown on the screen 1340.

Thereafter, the grading apparatus may grade the original clothing on which the zippers are arranged to fit the 3D target avatar. In this case, the grading apparatus may extract at least one polygon matching the zipper from among a plurality of polygons modeling a two-dimensional pattern corresponding to the original garment. The grading apparatus may grade at least one subsidiary material element based on the at least one polygonal grading information. In this case, the grading apparatus may extract at least one polygon by mediating the zipper along the line of the polygon mesh of the pattern piece to which the zipper is applied among the two-dimensional patterns, based on the grading information of at least one polygon. The grading apparatus may grade the zipper to fit the target garment according to the polygonal grading information extracted along the line.

After grading, the grading apparatus according to an exemplary embodiment may maintain the same length ratio between the sewing lines sewn to each other in the two-dimensional pattern of the original garment even in the target pattern after grading. In other words, the grading device has a length ratio (for example, 1:1) between the sewing lines connected to each other on the target pattern, and the length ratio (for example, 1:1) between the sewing lines connected to each other on the corresponding original pattern. ). If the length ratio between the sewing lines connected to each other is not maintained, the length of the seam is different, which may cause the clothes to cry.

To this end, in an embodiment, the length ratio of the sewing line may be maintained during grading on a target pattern given after solving Equation 7 described above.

The grading apparatus is, for example, the first length ratio of the sewing lines of the original pattern corresponding to the second length ratio of the sewing lines between the target patterns connected to each other by sewing in the target pattern converted based on the positions of the points on the sixth mesh candidate It is possible to set a second limit that satisfies.

The grading apparatus may calculate the target lengths of all line segments on both sewing lines of the target pattern so that the lengths of the sewing lines are measured on the given target pattern after solving Equation 7 above, and the first length ratio of the sewing lines on the original pattern is the same. .

로 정의하는 경우, 타겟 길이를 유지하도록 하는 제2 제한은

와 같이 표현될 수 있다. For example, take the target length vector of all the calculated segments

If defined as, the second limit to keep the target length is

It can be expressed as

In an embodiment, an optimization equation such as Equation 8 below may be obtained by adding a second limit to maintain the ratio of the length of the sewing line to Equation 7 described above.

In addition to the second objective function and the first limitation, the grading apparatus may determine positions of points on the sixth mesh candidate that satisfies Equation 8 that satisfies the second limitation.

The grading apparatus may generate a target pattern that maintains the curvature of the original pattern and also maintains the seam length ratio by obtaining the solution of Equation (8).

Depending on the embodiment, the grading apparatus may add a third limitation to maintain the pressure distribution of the original image as much as possible during optimization. According to an embodiment, a pressure distribution on the surface of the original avatar may be stored in the third mesh of the original clothing. Thereafter, the pressure distribution of the original clothes may be converted into a pressure distribution of the target clothes according to a conversion relationship between the third mesh of the original clothes and the first mesh of the original avatar. In this case, a portion of the original avatar whose volume is increased may be converted to a higher pressure in the original costume, and a portion of the original avatar whose volume is reduced may be converted to a lower pressure in the original costume. Thereafter, a 2D target pattern that satisfies the pressure distribution of the target garment calculated by the above-described conversion factor may be obtained.

14 is a block diagram of an apparatus for grading clothes including subsidiary material elements according to an exemplary embodiment. Referring to FIG. 14, a grading device 1400 according to an embodiment includes a user interface 1410, a processor 1430, and an output device 1470. The grading apparatus 1400 may further include a memory 1450. The user interface 1410, the processor 1430, the output device 1470, and the memory 1450 may communicate with each other through a communication bus 1405.

The user interface 1410 receives a user's selection of a 3D original avatar, a 3D target avatar, and at least one subsidiary material element. The user interface 1410 may include, for example, a stylus pen, a mouse, a keyboard, and a touch input through a touch interface.

The processor 1430 calculates 3D transformation information between the 3D original avatar and the 3D target avatar. The processor 1430 calculates 2D transformation information of a 2D pattern corresponding to the original clothing worn on the 3D original avatar based on the 3D transformation information. The processor 1430 determines grading information for grading the 2D pattern to correspond to the 3D target avatar based on the 2D transformation information. The processor 1430 identifies at least one subsidiary material element included in the original clothing. The processor 1430 extracts at least one polygon matching at least one subsidiary material element from among a plurality of polygons modeling a 2D pattern. The processor 1430 grades at least one subsidiary material element based on the at least one polygonal grading information. The processor 1430 applies at least one subsidiary material element graded by the at least one polygonal grading information to the 2D pattern graded by the at least one polygonal grading information.

The memory 1450 may store, for example, a 3D original avatar and a 3D target avatar received through the user interface 1410. In addition, the memory 1450 includes 3D transformation information between the 3D original avatar and the 3D target avatar calculated by the processor 1430 and/or the mapping relationship between the 3D original clothing worn on the original avatar and the body part of the original avatar. Can be saved. Also, the memory 1450 may store at least one of 2D transformation information and grading information of the 2D pattern calculated by the processor 1430. The memory 1450 may store a target clothing converted from the original clothing and a two-dimensional target pattern constituting the target clothing.

The output device 1470 outputs a result of applying at least one subsidiary material element graded by the at least one polygonal grading information to the 2D pattern graded by the at least one polygonal grading information. The output device 1470 may output the result on a screen or may output the result to the outside of the grading device 1400. The output device 1470 may be, for example, a display or a communication interface that communicates with the outside of the grading device 1400. Also, the output device 1470 may be a two-dimensional pattern output device that outputs a two-dimensional target pattern constituting the target garment to a separate output such as paper or cloth.

In addition, the processor 1430 may perform at least one method or an algorithm corresponding to at least one method described above with reference to FIGS. 1 to 13. The processor 1430 may execute a program and control the grading device 1400. The program code executed by the processor 1430 may be stored in the memory 1450. The processor 1430 may include, for example, a central processing unit (CPU), a graphics processing unit (GPU), or a neural network processing unit (NPU).

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiment, or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -A hardware system specially configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of the program instructions include not only machine language codes such as those produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operation of the embodiment, and vice versa.

The software may include a computer program, code, instructions, or a combination of one or more of these, configuring the processing unit to operate as desired or processed independently or collectively. You can command the device. Software and/or data may be interpreted by a processing system or, to provide instructions or data to a processing system, of any type of machine, component, physical system, virtual equipment, computer storage medium or system. It can be permanently or temporarily embody. The software may be distributed over networked computer systems and stored or executed in a distributed manner. Software and data may be stored on one or more computer-readable recording media.

As described above, although the embodiments have been described by the limited drawings, a person of ordinary skill in the art can apply various technical modifications and variations based on the above. For example, the described techniques are performed in an order different from the described method, and/or components such as the described system, structure, system, circuit, etc. are combined or combined in a form different from the described method, or other components Alternatively, even if substituted or substituted by an equivalent, an appropriate result can be achieved. Therefore, other implementations, other embodiments, and claims and equivalents fall within the scope of the following claims.

1400: grading device
1405: communication bus
1410: User interface
1430: processor
1450: memory
1470: output device

Claims (20)

Calculating 3D strain information between the 3D original avatar and the 3D target avatar;
Calculating 2D transformation information of a 2D pattern corresponding to the original clothing worn on the 3D original avatar based on the 3D transformation information;
Determining grading information for grading the 2D pattern to correspond to the 3D target avatar based on the 2D transformation information;
Identifying at least one subsidiary material element included in the original clothing;
Extracting at least one polygon matched with the at least one subsidiary material element from among a plurality of polygons modeling the 2D pattern; And
Grading the at least one subsidiary material element based on the at least one polygonal grading information
Containing,
A method of grading a garment that includes subsidiary materials. The method of claim 1,
The at least one subsidiary material element is
A first type of subsidiary element corresponding to a graphic attribute;
A second type of subsidiary element corresponding to the edit attribute; And
A third type of subsidiary element corresponding to the line attribute
Containing at least one of,
A method of grading a garment that includes subsidiary materials. The method of claim 1,
The two-dimensional pattern is
Contains a plurality of pattern pieces,
Each of the plurality of pattern pieces
Modeled as a polygon mesh based on the body shape of the original 3D avatar-the polygon mesh includes the plurality of polygons-
A method of grading a garment that includes subsidiary materials. The method of claim 1,
The step of extracting the at least one polygon
Extracting at least one polygon matching the at least one subsidiary element from among a plurality of polygons modeling the 2D pattern for each type of the subsidiary element
Containing,
A method of grading a garment that includes subsidiary materials. The method of claim 4,
When the subsidiary material element is of the first type, extracting the at least one polygon includes
Forming at least one graphic layer having the shape of the at least one subsidiary material element on the polygonal mesh of the two-dimensional pattern; And
Extracting at least one polygon matching the at least one sub-material element by matching a vertex of the polygon mesh on which the at least one graphic layer is formed and a texture coordinate of the sub-material element
Containing,
A method of grading a garment that includes subsidiary materials. The method of claim 5,
The at least one graphic layer
Including at least one of a graphic image, a normal map, and a color layer,
A method of grading a garment that includes subsidiary materials. The method of claim 5,
Grading the at least one subsidiary material element
Grading the at least one subsidiary material element by changing at least one of the position and size of the at least one graphic layer based on the at least one polygonal grading information
Containing,
A method of grading a garment that includes subsidiary materials. The method of claim 4,
When the subsidiary material element is of the second type, extracting the at least one polygon includes
Setting at least one first point for fixing the two-dimensional pattern;
Displaying a pin image at the first point;
Inputting a barycentric coordination corresponding to the pin image on the polygonal mesh of the two-dimensional pattern; And
Extracting at least one polygon matching the at least one subsidiary material element from among the plurality of polygons based on the coordinates
Containing,
A method of grading a garment that includes subsidiary materials. The method of claim 8,
Grading the at least one subsidiary material element
Transforming the polygonal mesh of the subsidiary material element based on the at least one polygonal grading information;
Calculating deformed coordinates corresponding to the pin image on the deformed polygonal mesh;
Displaying the pin image on the deformed coordinates and setting a second point for fixing at the deformed coordinates; And
Grading the at least one subsidiary material element from the deformed polygonal mesh based on the second point
Containing,
A method of grading a garment that includes subsidiary materials. The method of claim 4,
When the subsidiary material element is of the third type, extracting the at least one polygon
Extracting the at least one polygon by parameterizing the sub-material element to a polygonal mesh of a pattern piece to which the sub-material element is applied among the two-dimensional patterns, based on the grading information of the at least one polygon
Containing,
A method of grading a garment that includes subsidiary materials. The method of claim 1,
Grading the at least one subsidiary material element
Grading the at least one subsidiary element for each type of the at least one subsidiary element based on the at least one polygonal grading information
Containing,
A method of grading a garment that includes subsidiary materials. The method of claim 1,
The step of grading the at least one subsidiary material
Grading the at least one subsidiary material while maintaining at least one of a curvature of an outline in the 2D pattern and a length ratio of a sewing line in the 2D pattern based on the grading information of the at least one polygon
Containing,
A method of grading a garment that includes subsidiary materials. The method of claim 1,
The step of calculating the three-dimensional deformation information
Calculating the 3D transformation information by mapping transformations between the 3D original avatar and the 3D target avatar in corresponding mesh units, respectively
Containing,
A method of grading a garment that includes subsidiary materials. The method of claim 1,
The step of calculating the three-dimensional deformation information
Determining a mapping relationship between a deformation portion in which deformation exists between the three-dimensional original avatar and the three-dimensional target avatar and a pattern piece of the two-dimensional pattern corresponding to the deformation portion; And
Calculating the 3D transformation information based on the mapping relationship
Containing,
A method of grading a garment that includes subsidiary materials. The method of claim 1,
The step of calculating the two-dimensional transformation information
When the subsidiary material element is applied to the curve of the two-dimensional pattern, calculating the two-dimensional deformation information in a direction tangential to the curve of the two-dimensional pattern
Containing,
A method of grading a garment that includes subsidiary materials. The method of claim 1,
Receiving a group setting for a button and a button hole among the at least one subsidiary material element; And
The distance from the outline of the 2D pattern to the button hole set as the button and the group, the starting position and the ending position where the button hole is created in the 2D pattern, the direction in which the button hole is created in the 2D pattern, the Receiving a user selection for the subsidiary material element including at least one of the number of button holes generated in the two-dimensional pattern, an interval between the button holes, attributes of the button holes, and styles of the button holes
Further comprising at least one of,
A method of grading a garment that includes subsidiary materials. The method of claim 1,
Grading the at least one subsidiary material element
Determining whether the at least one subsidiary material element is a type requiring scaling;
Determining whether there are predetermined standards of the at least one subsidiary material element; And
Selecting one of the predetermined standards based on the scaled size of the subsidiary material element according to the determination results
Containing,
A method of grading a garment that includes subsidiary materials. The method of claim 1,
Receiving a setting for whether to apply the grading for each type of the at least one subsidiary material element
Further comprising,
A method of grading a garment that includes subsidiary materials. A computer program stored in a computer-readable recording medium for executing the method of any one of claims 1 to 18 in combination with hardware. A user interface for receiving a user's selection of a 3D original avatar, a 3D target avatar, and at least one subsidiary element;
Calculate 3D transformation information between the 3D original avatar and the 3D target avatar, and based on the 3D transformation information, 2D transformation information of a 2D pattern corresponding to the original clothing worn on the 3D original avatar Calculating, based on the two-dimensional transformation information, determining grading information for grading the two-dimensional pattern to correspond to the three-dimensional target avatar, identifying at least one subsidiary element included in the original clothing, and the second A processor for extracting at least one polygon matching the at least one sub-material element from among a plurality of polygons for modeling a dimensional pattern, and grading the at least one sub-material element based on grading information of the at least one polygon; And
An output device for outputting a result of applying the at least one subsidiary material element graded by the at least one polygonal grading information to the 2D pattern graded by the at least one polygonal grading information
Containing,
Apparel grading device including subsidiary materials.

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