A Men's Suit Grading and Free Combination System Based on Dimensional Decoupling

Abstract

This invention discloses a men's suit grading and free combination system based on dimensional decoupling, comprising: a basic pattern module for storing basic patterns of specific suit styles and their control point networks; an independent grading module for performing decoupled displacement calculations on each control point according to a preset three-dimensional independent rule library of horizontal circumference, vertical length, and local details, generating a three-dimensional independent grading dataset; a combination generation module for receiving user size combination instructions, matching and fusing control point coordinates from different dimensions, and reconstructing and generating a target customized pattern according to the basic pattern connection rules; and a verification and correction module for automatically verifying and correcting the contour smoothness of the generated pattern. This invention achieves personalized and efficient grading based on a single basic pattern through dimensional decoupling and free combination, reducing repetitive work and meeting the personalized needs of customers.

Description

Technical Field

[0001] This invention relates to the field of clothing design and manufacturing technology, and in particular to a men's suit grading and free combination system based on dimensional decoupling. Background Technology

[0002] Grading (also known as pattern making or pattern grading) is a core step in industrialized garment production. Its goal is to generate a series of patterns in different sizes from a basic pattern (master pattern) through systematic scaling to meet the needs of mass production. Traditional suit grading is a "one-size-fits-all" scaling method. Its core principle is to use a mid-size (e.g., L) as the base master pattern, and then synchronously and uniformly enlarge or reduce all control points on the pattern according to pre-defined, interrelated size ranges (e.g., chest, waist, length, shoulder width, sleeve length). This method aims to ensure that all sizes from S to XXL maintain complete consistency in style, proportions (e.g., armhole depth to chest, waistline to length) with the base master pattern, ensuring a uniform fit for suits of different sizes.

[0003] However, this traditional integrated grading method has certain problems when dealing with the modern demands for personalized, small-batch, and fast-response garment customization: First, there is redundancy and inefficiency in basic pattern making: To cope with the limited demand for non-standard size combinations, traditionally, multiple sets of basic master patterns with different combinations can only be prepared in advance. This not only causes a lot of repetitive work in the early pattern-making stage, but also makes pattern room management complex and the cost of storing and maintaining multiple sets of basic patterns high. Every new size combination demand almost means a manual pattern-making process starting from scratch, which severely restricts the efficiency of customized production.

[0004] Secondly, the rigid sequence of the operation process: Traditional two-dimensional grading operations have a strict sequential order and must be performed sequentially within a fixed dimensional relationship framework. Operators cannot flexibly or erratically adjust a single dimension, which makes the grading process mechanized, slow, and difficult to adapt to rapidly changing design requirements.

[0005] Third, the lack of dimensional binding and flexibility results in insufficient support for personalized customization: Traditional methods treat the horizontal circumference, vertical length, and local details of clothing as an inseparable whole and scale them in a coordinated manner. This makes it impossible to sized and pattern according to the requirements of different individual customers, resulting in a rigid and inflexible approach. Summary of the Invention

[0006] This invention provides a men's suit grading and free combination system based on dimensional decoupling to overcome the above-mentioned technical problems.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: A men's suit grading and free combination system based on dimensional decoupling includes: a basic pattern module, an independent grading module, a combination generation module, and a verification and correction module; The basic pattern module is used to store, manage, and provide basic digital patterns and structural information of specific styles of suits; The independent coding module is connected to the basic template module and is used to perform independent and uncoupled coding calculations on the basic template based on a preset independent rule base for three dimensions: horizontal circumference, vertical length, and local details, to generate coding template datasets corresponding to the three dimensions respectively. The combined generation module is connected to the independent grading module. It is used to receive user size instructions, select data of the corresponding dimension from the grading pattern dataset of the three dimensions, perform coordinate fusion, and reconstruct the basic digital pattern according to the pattern outline generation rules to generate the target customized pattern. The verification and correction module is connected to the combination generation module and is used to verify the contour smoothness of the target customized template generated by reconstruction.

[0008] Furthermore, the basic template module includes a basic template storage unit and a control point network definition and management unit; The basic pattern storage unit is used to store basic industrial pattern files for specific styles of suits; The control point network definition and management unit is used to determine control points of structural base point type on the basic template by accurate coordinate basis method, determine control points of intersection type of adjacent structural lines by contour topology extraction method, determine control points of internal positioning point type of template by internal feature mapping method, determine control points of intersection type of transverse reference line and structural line by circumference ratio allocation method, and determine control points of curve turning point type by curve discretization fitting method, forming a control point network containing multiple control points, and storing the coordinates, type and topological connection relationship of each control point.

[0009] Furthermore, control points of the intersection type of adjacent structural lines are determined by contour topology extraction method, control points of the type of internal positioning points of the template are determined by internal feature mapping method, control points of the type of intersection of transverse reference lines and structural lines are determined by girth ratio allocation method, and control points of the type of curve inflection points are determined by curve discretization fitting method, including: The control points for determining the intersection type of adjacent structural lines are obtained by traversing all the outer contour lines of the front, back, and sleeve pieces of the suit and extracting the physical intersection point of any two structural lines as the control points for the intersection type of adjacent structural lines. The control points for the type of internal positioning points in the pattern are determined by the internal feature mapping method. According to the suit manufacturing standards, the internal feature points that do not participate in the outline formation but change synchronously with the cut pieces are used as the control points for the type of internal positioning points in the pattern. The control point for determining the intersection type of the horizontal reference line and the structural line by the circumference ratio allocation method is on the horizontal reference line of the bust line and waist line. The position of the intersection point is determined according to the ratio allocation rules of the bust and waist circumference differences. The control points for determining the curve inflection point type by using the curve discretization fitting method are obtained by segmenting the complex curves of clothing into Bézier curves and inserting control points at the curvature inflection points.

[0010] Furthermore, the control points of the structural base point type include the intersection of the bust line and the armhole line, the intersection of the armhole line and the front seam line, the intersection of the small sleeve cap and the inner sleeve seam, and the intersection of the large sleeve cap and the inner sleeve seam. The control points for the intersection types of adjacent structural lines include the intersection of the garment length line and the side seam line, the placket hem point, the lapel width point, the front neck point, the front shoulder point, the intersection of the armhole line and the back side seam line, the intersection of the side garment length line and the back side seam line, the intersection of the garment length line and the front side seam line, the intersection of the garment length line and the back center line, the intersection of the back garment length line and the back side seam line, the intersection of the back armhole curve line and the back side seam line, the back shoulder point, the back neck point, the back center point, the intersection of the sleeve cap line and the outer sleeve line of the small sleeve piece, the end point of the outer cuff of the small sleeve piece, the intersection of the inner sleeve seam and the cuff line of the small sleeve piece, the intersection of the sleeve cap line and the outer sleeve line of the large sleeve piece, the end point of the outer cuff of the large sleeve piece, the intersection of the inner sleeve seam and the cuff line of the large sleeve piece, the upper center point of the collar stand, the lower center point of the collar stand, the middle point of the collar face, the lower center point of the collar face, the collar point point, and the crossover point. The control points of the template's internal positioning point type include the chest dart point and the handkerchief pocket point; The control points for the intersection types of the transverse reference lines and structural lines include the intersection of the waistline and side seam, the lapel point, the intersection of the side panel waistline and the back side seam, the intersection of the back center line and the waistline, the intersection of the back panel waistline and the back side seam, and the back width. The control point for the curve inflection point type is the sleeve mountain point.

[0011] Furthermore, the independent coding module includes a three-dimensional rule base and a decoupled calculation engine; The three-dimensional rule base is used to store the displacement rules of the control point in three dimensions: horizontal circumference, vertical length, and local details. The decoupled calculation engine is used to receive the target size instruction and call the corresponding rules in the three-dimensional rule base to independently calculate the displacement of each control point in the three dimensions, forming three independent grading datasets.

[0012] Furthermore, the displacement rules for the horizontal circumference dimension are used to define the formula for calculating the displacement of control points in the horizontal axis direction when the circumference changes; the displacement rules for the vertical length dimension are used to define the formula for calculating the displacement of control points in the vertical axis direction when the length changes; and the displacement rules for the local detail dimension are used to define the formula for calculating the displacement of control points for lapel, collar, and sleeve components.

[0013] Furthermore, the displacement rules for the lateral circumference dimension include: The displacement of the points where the bust line and armhole line intersect, the front shoulder point, the handkerchief pocket point, the armhole line and the front side seam, the garment length line and the front side seam, the bust line and the back center line, the back center line and the waistline, the garment length line and the back center line, and the back center point is 0. For the intersection of the waistline and the side seam, the displacement is the difference between the bust circumference and the waist circumference. For the intersection of the garment length line and the side seam line, the displacement is the difference between the bust circumference and the hem circumference. For the placket hem point, lapel point, and lapel width point, the displacement is the difference in chest circumference. 21.25%; For the anterior neck point and chest dart point, the displacement is the shoulder width difference. 50% - Displacement of the lateral axis of the posterior neck point; The displacement at the intersections of the armhole line and the back seam, the waistline and the back seam, and the length line and the back seam is the bust measurement difference. 12.5%; The displacement at the intersection of the back garment length line and the back side seam is the hem circumference difference. 16.25%; The displacement at the intersection of the back waistline and the back side seam, and at the intersection of the back armhole curve and the back side seam, is the waist circumference difference. 16.25%; For the rear shoulder point, the displacement is the shoulder width difference. 50%; For the posterior neck point, the displacement is the difference in chest circumference. 6.25%; For the widest point on the back, the displacement is the difference in chest circumference. 15.625%.

[0014] Furthermore, the rules for displacement in the vertical length dimension include: The displacement is 0 at the intersection of the bust line and the armhole line, the handkerchief pocket point, the intersection of the armhole line and the front seam, and the intersection of the bust line and the back center line. For the intersection of the waistline and side seam, the lapel point, the bust dart point, the intersection of the side waistline and back side seam, the intersection of the back center line and waistline, and the intersection of the back waistline and back side seam, the displacement is the garment length difference * 50% - the displacement of the back center point longitudinal axis. For the intersection of the garment length line and the side seam line, the placket point, the intersection of the side garment length line and the back side seam line, the intersection of the garment length line and the front side seam line, the intersection of the garment length line and the back center line, and the intersection of the back garment length line and the back side seam line, the displacement is the garment length difference minus the displacement of the back center point longitudinal axis. For the lapel width point, front neck point, and rear neck point, the displacement is the displacement of the rear midpoint longitudinal axis + 0.05. For the front shoulder point, back shoulder point, and back midpoint, the displacement is the difference in chest circumference. 15%; For the intersection of the armhole line and the back side seam, and the intersection of the back armhole curve and the back side seam, the displacement is the displacement of the longitudinal axis of the back width point. 50%; For the widest point on the back, its displacement is the displacement of the longitudinal axis of the midpoint of the back. 50%.

[0015] Furthermore, the displacement rules for the local detail dimension include: The displacement at the intersection of the small sleeve cap and the inner sleeve seam and the large sleeve cap and the inner sleeve seam is 0. For the intersection of the sleeve cap line and the outer sleeve line of the small sleeve piece, and the intersection of the sleeve cap line and the outer sleeve line of the large sleeve piece, the vertical axis displacement is the displacement of the vertical axis at the back center point. 50%, its horizontal axis displacement is the difference between sleeve and fat grades. 50%; For the outer cuff endpoints of the small sleeve piece and the large sleeve piece, the vertical axis displacement is the sleeve length difference minus the vertical axis displacement of the sleeve cap point, and the horizontal axis displacement is the cuff length difference. 50%; For the intersection of the inner sleeve seam and cuff line of the small sleeve piece and the intersection of the sleeve cap line and outer sleeve line of the large sleeve piece, the vertical axis displacement is the sleeve length difference minus the vertical axis displacement of the sleeve cap point, and the horizontal axis displacement is 0. For the sleeve cap point, its vertical axis displacement is the displacement of the vertical axis at the intersection of the back armhole curve and the back side seam - 0.08, and its horizontal axis displacement is the sleeve width difference. 50%; For the upper midpoint, lower midpoint, upper midpoint, and lower midpoint of the collar stand, the vertical axis displacement is 0, and the horizontal axis displacement is the difference in chest circumference. 6.25%; For the neckline point and the crotch point, the vertical axis displacement is the difference in chest circumference. 6.25%, its horizontal axis displacement is the collar spacing difference.

[0016] Furthermore, the combined generation module includes a coordinate matching and fusion unit and a contour reconstruction unit; The coordinate matching and fusion unit is used to receive three sets of coordinate data from the independent coding module, and to judge each point in the control point network: if the point belongs to a local detail control point, the coordinates calculated by the local detail rule library are directly used; if the point does not belong to a local detail control point, the calculation results from the horizontal girth and vertical length dimensions are combined to obtain new coordinates. The contour reconstruction unit reads the complete set of coordinates of the new control points obtained after fusion, and reconnects the discrete new control points into continuous garment contour lines according to the connection rules and curve generation algorithm pre-stored in the basic template module for this suit, forming a new template.

[0017] Beneficial effects: This invention provides a men's suit grading and free combination system based on dimensional decoupling, which has the following advantages: 1. This invention adopts multi-dimensional grading, and grading in different dimensions such as horizontal, vertical and local dimensions can be completed simultaneously and independently. It does not require multiple sets of basic templates, and the local size adjustment is more accurate, reducing process steps, improving grading and pushing efficiency, and reducing repetitive work. 2. This invention achieves free combination of circumference, length, and details through dimensional decoupling and control point matching. The combined template has a smooth outline. At the same time, the matching scheme is verified by combining professional knowledge of production and process to meet the personalized needs of customers and improve user satisfaction and personalization. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A system block diagram of a men's suit grading and free combination system based on dimensional decoupling provided by the present invention; Figure 2 The basic template image and control point diagram provided for this invention; Figure 3 This is a schematic diagram of the push plate data for each control point provided by the present invention; Figure 4 This is a schematic diagram of the independent grading pusher plate for each dimension provided by the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This embodiment provides a men's suit grading and free combination system based on dimensional decoupling, such as... Figure 1 As shown, it includes: a basic template module, an independent coding module, a combined generation module, and a verification and correction module; The basic pattern module is used to store, manage, and provide the basic digital pattern and its structural information for the specific style of suit; Specifically, the basic template module includes a basic template storage unit and a control point network definition and management unit; The basic pattern storage unit is used to store the industrial pattern file of the basic suit pattern, including the precise outline data of the front piece, side piece, back piece, sleeve and collar; The control point network definition and management unit is used to determine control points of structural base point type on the basic template through coordinate base accurate legislation, determine control points of intersection type of adjacent structural lines through contour topology extraction method, determine control points of internal positioning point type of template through internal feature mapping method, determine control points of intersection type of transverse reference line and structural line through circumference ratio allocation method, and determine control points of curve turning point type through curve discretization fitting method, forming a control point network containing multiple control points, recording and storing the coordinates, type (such as base point, arc point, apex point) of each control point, and the topological connection relationship between each point (i.e., the generation order and rules of contour lines). The control points are determined using the contour topology extraction method to identify the intersection points of adjacent structural lines, the internal feature mapping method to identify the internal positioning points of the template, the girth ratio allocation method to identify the intersection points of the transverse reference lines and structural lines, and the curve discretization fitting method to identify the curve inflection points. The control points for determining the intersection type of adjacent structural lines are obtained by traversing all the outer contour lines of the front, back, and sleeve pieces of the suit and extracting the physical intersection point of any two structural lines as the control points for the intersection type of adjacent structural lines. The control points for determining the type of internal positioning points in the pattern are determined using the internal feature mapping method. Based on suit manufacturing standards, these internal feature points, which do not participate in the overall silhouette but change synchronously with the cut pieces, are used as the control points for the pattern's internal positioning point type. Specifically: Based on the structural design of suits, we selected internal feature points that support the functions of pockets and darts. Select the points that must shift synchronously with the garment body pieces during size changes; Once it is confirmed that the feature points do not participate in forming the outer contour of the cut piece, control points of the final template internal positioning point type are obtained; The control point for determining the intersection type of the horizontal reference line and the structural line by the circumference ratio allocation method is on the horizontal reference line of the bust line and waist line. The position of the intersection point is determined according to the ratio allocation rules of the bust and waist circumference differences. The control points for determining the curve inflection point type by using the curve discretization fitting method are obtained by segmenting the complex curves of clothing into Bézier curves and inserting control points at the curvature inflection points. control points such as Figure 2 As shown, the control points of the structural base point type in this invention include the intersection of the bust line and the armhole line (control point 1), the intersection of the armhole line and the front side seam line (control point 11), the intersection of the small sleeve cap and the inner sleeve seam (control point 25), and the intersection of the large sleeve cap and the inner sleeve seam (control point 29). Control points for the intersection of adjacent structural lines include: the intersection of the garment length line and the side seam line (control point 3), the placket hem point (control point 4), the lapel width point (control point 6), the front neck point (control point 7), the front shoulder point (control point 8), the intersection of the armhole line and the back side seam line (control point 12), the intersection of the side garment length line and the back side seam line (control point 14), the intersection of the garment length line and the front side seam line (control point 15), the intersection of the garment length line and the back center line (control point 18), the intersection of the back garment length line and the back side seam line (control point 19), the intersection of the back armhole curve and the back side seam line (control point 21), the back shoulder point (control point 22), and the back neck point. Control point 23, back center point 24, intersection of sleeve cap line and outer sleeve line of small sleeve piece 26, outer cuff end point of small sleeve piece 27, intersection of inner sleeve seam and cuff line of small sleeve piece 28, intersection of sleeve cap line and outer sleeve line of large sleeve piece 31, outer cuff end point of large sleeve piece 32, intersection of inner sleeve seam and cuff line of large sleeve piece 33, upper center point of collar stand 34, lower center point of collar stand 35, upper center point of collar face 36, lower center point of collar face 37, collar point point 38, and collar point (control point 39). The control points for the internal positioning point type of the template include the chest dart point (control point 9) and the handkerchief pocket point (control point 10). The control points for the intersection of the horizontal reference line and the structural line include: the intersection of the waistline and the side seam (control point 2), the lapel point (control point 5), the intersection of the side waistline and the back side seam (control point 13), the intersection of the back center line and the waistline (control point 17), the intersection of the back waistline and the back side seam (control point 20), and the back width (control point 40). The control point for the curve inflection point type is the sleeve point (control point 30); The independent grading module is connected to the basic template module and is used to perform independent and uncoupled grading calculations on the basic template based on a preset independent rule base for three dimensions: horizontal circumference, vertical length, and local details, to generate grading template datasets corresponding to the three dimensions respectively; the preset rule base stores the displacement rules of each control point in each dimension. Specifically, the independent coding module includes a three-dimensional rule base and a decoupled calculation engine; The displacement rules in the three-dimensional rule base are pre-defined based on clothing grade differences and structural features, as follows: The rules for displacement in the lateral circumference dimension are used to define the formula for calculating the displacement of control points in the lateral axis direction when the circumference (chest, waist, hip) changes. The specific calculation formulas are shown in the table below: Table 1. Lateral Dimension Layout Rules

[0022] The vertical length dimension displacement rule is used to define the displacement calculation formula of the control point in the vertical axis direction when the length (garment length, sleeve length, waist length) changes. The specific calculation formula is shown in the table below: Table 2 Vertical Length Coding Rules

[0023] The displacement rules at the local detail level are used to define the formulas for calculating the displacement of control points for lapel, collar, and sleeve components, as shown in the table below: Table 3. Local Detail Coding Rules

[0024] The decoupled calculation engine is used to receive target size instructions from user input or external systems and perform the following calculation steps: Call the displacement rules of the horizontal circumference dimension, take the input target size circumference difference as input, and calculate the new set of horizontal axis coordinates of all control points in the circumference dimension; The displacement rules in the vertical length dimension are invoked, and the new set of vertical axis coordinates of all control points in the length dimension is calculated using the target size garment length difference as input. By calling the displacement rules of the local detail dimension, and taking the target size sleeve length difference as input, a new set of coordinates of the relevant local control points is calculated; This embodiment uses a size L men's suit as the base pattern, and the calculated displacement is as follows: Figure 3 As shown; The combined generation module is connected to the independent grading module. It is used to receive user size instructions, select data of the corresponding dimension from the grading pattern dataset of the three dimensions, perform coordinate fusion, and reconstruct the basic digital pattern according to the pattern outline generation rules to generate the target customized pattern. The combined generation module includes a coordinate matching and fusion unit and a contour reconstruction unit; The coordinate matching and fusion unit is used to receive three sets of coordinate data from the independent coding module, and to judge each point in the control point network: if the point belongs to a local detail control point, the coordinates calculated by the local detail rule library are directly used; if the point does not belong to a local detail control point, the calculation results from the horizontal girth dimension and the vertical length dimension are combined to obtain new coordinates. The contour reconstruction unit reads the complete set of coordinates of the new control points obtained after fusion, and reconnects the discrete new control points into continuous garment contour lines according to the connection rules and curve generation algorithm pre-stored in the basic template module for this suit, forming a new template; the sizing effect in each dimension is as follows: Figure 4 As shown; The verification and correction module is connected to the combination generation module and is used to verify the contour smoothness of the reconstructed target customized template to ensure its process feasibility and maintain the original style characteristics. Specifically, the verification and correction module is used to perform geometric analysis on the outline of the newly generated pattern, such as checking the curvature continuity of the armhole curve and neckline curve to avoid sharp points or uneven inflection points; if uneven inflection points are found, the position of the control points is adjusted based on experience until a final qualified pattern that meets all process and style requirements is generated.

[0025] This invention utilizes a garment CAD system to achieve automatic pattern grading through parameterized settings of control point displacement. Control point displacement is adjusted horizontally, vertically, and locally, resulting in decoupled pattern grading that can be arbitrarily combined. The final pattern is generated through contour smoothing and process verification. This method allows for independent grading in different dimensions using a single basic pattern, which can then be flexibly combined according to different customer needs, eliminating the need for multiple basic patterns and reducing workload. Simultaneously, it breaks the limitations of traditional pattern grading with fixed dimensions, separating circumference, length, and local details into independent dimensions, enabling free cross-dimensional combinations to adapt to personalized customization scenarios. Furthermore, through control point coordinate marking and precise displacement calculation, it solves the problem of ambiguous local dimension adjustments in traditional pattern grading, ensuring pattern consistency.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A men's suit grading and free combination system based on dimensional decoupling, characterized in that, include: The module consists of a basic template module, an independent coding module, a combined generation module, and a verification and correction module. The basic pattern module is used to store, manage, and provide basic digital patterns and structural information of specific styles of suits; The independent coding module is connected to the basic template module and is used to perform independent and uncoupled coding calculations on the basic template based on a preset independent rule base for three dimensions: horizontal circumference, vertical length, and local details, to generate coding template datasets corresponding to the three dimensions respectively. The combined generation module is connected to the independent grading module. It is used to receive user size instructions, select data of the corresponding dimension from the grading pattern dataset of the three dimensions, perform coordinate fusion, and reconstruct the basic digital pattern according to the pattern outline generation rules to generate the target customized pattern. The verification and correction module is connected to the combination generation module and is used to verify the contour smoothness of the target customized template generated by reconstruction.

2. The men's suit grading and free combination system based on dimensional decoupling according to claim 1, characterized in that, The basic template module includes a basic template storage unit and a control point network definition and management unit; The basic pattern storage unit is used to store basic industrial pattern files for specific styles of suits; The control point network definition and management unit is used to determine control points of structural base point type on the basic template by accurate coordinate basis method, determine control points of intersection type of adjacent structural lines by contour topology extraction method, determine control points of internal positioning point type of template by internal feature mapping method, determine control points of intersection type of transverse reference line and structural line by circumference ratio allocation method, and determine control points of curve turning point type by curve discretization fitting method, forming a control point network containing multiple control points, and storing the coordinates, type and topological connection relationship of each control point.

3. The men's suit grading and free combination system based on dimensional decoupling according to claim 2, characterized in that, Control points of the intersection type of adjacent structural lines are determined through contour topology extraction; control points of the type of internal positioning points of the template are determined through internal feature mapping; control points of the type of intersection of the transverse reference line and structural line are determined through girth ratio allocation; and control points of the type of curve inflection point are determined through curve discretization fitting. (The methods include:) The control points for determining the intersection type of adjacent structural lines are obtained by traversing all the outer contour lines of the front, back, and sleeve pieces of the suit and extracting the physical intersection point of any two structural lines as the control points for the intersection type of adjacent structural lines. The control points for the type of internal positioning points in the pattern are determined by the internal feature mapping method. According to the suit manufacturing standards, the internal feature points that do not participate in the outline formation but change synchronously with the cut pieces are used as the control points for the type of internal positioning points in the pattern. The control point for determining the intersection type of the horizontal reference line and the structural line by the circumference ratio allocation method is on the horizontal reference line of the bust line and waist line. The position of the intersection point is determined according to the ratio allocation rules of the bust and waist circumference differences. The control points for determining the curve inflection point type by using the curve discretization fitting method are obtained by segmenting the complex curves of clothing into Bézier curves and inserting control points at the curvature inflection points.

4. The men's suit grading and free combination system based on dimensional decoupling according to claim 2, characterized in that, The control points of the structural base point type include the intersection of the bust line and the armhole line, the intersection of the armhole line and the front seam, the intersection of the small sleeve cap and the inner sleeve seam, and the intersection of the large sleeve cap and the inner sleeve seam. The control points for the intersection types of adjacent structural lines include the intersection of the garment length line and the side seam line, the placket hem point, the lapel width point, the front neck point, the front shoulder point, the intersection of the armhole line and the back side seam line, the intersection of the side garment length line and the back side seam line, the intersection of the garment length line and the front side seam line, the intersection of the garment length line and the back center line, the intersection of the back garment length line and the back side seam line, the intersection of the back armhole curve line and the back side seam line, the back shoulder point, the back neck point, the back center point, the intersection of the sleeve cap line and the outer sleeve line of the small sleeve piece, the end point of the outer cuff of the small sleeve piece, the intersection of the inner sleeve seam and the cuff line of the small sleeve piece, the intersection of the sleeve cap line and the outer sleeve line of the large sleeve piece, the end point of the outer cuff of the large sleeve piece, the intersection of the inner sleeve seam and the cuff line of the large sleeve piece, the upper center point of the collar stand, the lower center point of the collar stand, the middle point of the collar face, the lower center point of the collar face, the collar point point, and the crossover point. The control points of the template's internal positioning point type include the chest dart point and the handkerchief pocket point; The control points for the intersection types of the transverse reference lines and structural lines include the intersection of the waistline and side seam, the lapel point, the intersection of the side panel waistline and the back side seam, the intersection of the back center line and the waistline, the intersection of the back panel waistline and the back side seam, and the back width. The control point for the curve inflection point type is the sleeve mountain point.

5. The men's suit grading and free combination system based on dimensional decoupling according to claim 4, characterized in that, The independent coding module includes a three-dimensional rule base and a decoupled calculation engine; The three-dimensional rule base is used to store the displacement rules of the control point in three dimensions: horizontal circumference, vertical length, and local details. The decoupled calculation engine is used to receive the target size instruction and call the corresponding rules in the three-dimensional rule base to independently calculate the displacement of each control point in the three dimensions, forming three independent grading datasets.

6. The men's suit grading and free combination system based on dimensional decoupling according to claim 5, characterized in that, The displacement rules for the horizontal circumference dimension are used to define the formula for calculating the displacement of control points in the horizontal axis direction when the circumference changes; the displacement rules for the vertical length dimension are used to define the formula for calculating the displacement of control points in the vertical axis direction when the length changes; and the displacement rules for the local detail dimension are used to define the formula for calculating the displacement of control points in lapel, collar, and sleeve components.

7. A men's suit grading and free combination system based on dimensional decoupling according to claim 6, characterized in that, The displacement rules for the lateral circumference dimension include: The displacement of the points where the bust line and armhole line intersect, the front shoulder point, the handkerchief pocket point, the armhole line and the front side seam, the garment length line and the front side seam, the bust line and the back center line, the back center line and the waistline, the garment length line and the back center line, and the back center point is 0. For the intersection of the waistline and the side seam, the displacement is the difference between the bust circumference and the waist circumference. For the intersection of the garment length line and the side seam line, the displacement is the difference between the bust circumference and the hem circumference. For the placket hem point, lapel point, and lapel width point, the displacement is the difference in chest circumference. 21.25%; For the anterior neck point and chest dart point, the displacement is the shoulder width difference. 50% - Displacement of the lateral axis of the posterior neck point; The displacement at the intersections of the armhole line and the back seam, the waistline and the back seam, and the length line and the back seam is the bust measurement difference. 12.5%; The displacement at the intersection of the back garment length line and the back side seam is the hem circumference difference. 16.25%; The displacement at the intersection of the back waistline and the back side seam, and at the intersection of the back armhole curve and the back side seam, is the waist circumference difference. 16.25%; For the rear shoulder point, the displacement is the shoulder width difference. 50%; For the posterior neck point, the displacement is the difference in chest circumference. 6.25%; For the widest point on the back, the displacement is the difference in chest circumference. 15.625%.

8. A men's suit grading and free combination system based on dimensional decoupling according to claim 6, characterized in that, The rules for displacement in the vertical length dimension include: The displacement is 0 at the intersection of the bust line and the armhole line, the handkerchief pocket point, the intersection of the armhole line and the front seam, and the intersection of the bust line and the back center line. For the intersection of the waistline and side seam, the lapel point, the bust dart point, the intersection of the side waistline and back side seam, the intersection of the back center line and waistline, and the intersection of the back waistline and back side seam, the displacement is the garment length difference * 50% - the displacement of the back center point longitudinal axis. For the intersection of the garment length line and the side seam line, the placket point, the intersection of the side garment length line and the back side seam line, the intersection of the garment length line and the front side seam line, the intersection of the garment length line and the back center line, and the intersection of the back garment length line and the back side seam line, the displacement is the garment length difference minus the displacement of the back center point longitudinal axis. For the lapel width point, front neck point, and rear neck point, the displacement is the displacement of the rear midpoint longitudinal axis + 0.

05. For the front shoulder point, back shoulder point, and back midpoint, the displacement is the difference in chest circumference. 15%; For the intersection of the armhole line and the back side seam, and the intersection of the back armhole curve and the back side seam, the displacement is the displacement of the longitudinal axis of the back width point. 50%; For the widest point on the back, its displacement is the displacement of the vertical axis of the midpoint behind the point. 50%.

9. A men's suit grading and free combination system based on dimensional decoupling according to claim 6, characterized in that, The displacement rules for the local detail dimension include: The displacement at the intersection of the small sleeve cap and the inner sleeve seam and the large sleeve cap and the inner sleeve seam is 0. For the intersection of the sleeve cap line and the outer sleeve line of the small sleeve piece, and the intersection of the sleeve cap line and the outer sleeve line of the large sleeve piece, the vertical axis displacement is the displacement of the vertical axis at the back center point. 50%, its horizontal axis displacement is the difference between sleeve and fat grades. 50%; For the outer cuff endpoints of the small sleeve piece and the large sleeve piece, the vertical axis displacement is the sleeve length difference minus the vertical axis displacement of the sleeve cap point, and the horizontal axis displacement is the cuff length difference. 50%; For the intersection of the inner sleeve seam and cuff line of the small sleeve piece and the intersection of the sleeve cap line and outer sleeve line of the large sleeve piece, the vertical axis displacement is the sleeve length difference minus the vertical axis displacement of the sleeve cap point, and the horizontal axis displacement is 0. For the sleeve cap point, its vertical axis displacement is the displacement of the vertical axis at the intersection of the back armhole curve and the back side seam - 0.08, and its horizontal axis displacement is the sleeve width difference. 50%; For the upper midpoint, lower midpoint, upper midpoint, and lower midpoint of the collar stand, the vertical axis displacement is 0, and the horizontal axis displacement is the difference in chest circumference. 6.25%; For the neckline point and the crotch point, the vertical axis displacement is the difference in chest circumference. 6.25%, its horizontal axis displacement is the collar spacing difference.

10. A men's suit grading and free combination system based on dimensional decoupling according to claim 1, characterized in that, The combined generation module includes a coordinate matching and fusion unit and a contour reconstruction unit; The coordinate matching and fusion unit is used to receive three sets of coordinate data from the independent coding module, and to judge each point in the control point network: if the point belongs to a local detail control point, the coordinates calculated by the local detail rule library are directly used; if the point does not belong to a local detail control point, the calculation results from the horizontal girth dimension and the vertical length dimension are combined to obtain new coordinates. The contour reconstruction unit reads the complete set of coordinates of the new control points obtained after fusion, and reconnects the discrete new control points into continuous garment contour lines according to the connection rules and curve generation algorithm pre-stored in the basic template module for this suit, forming a new template.

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