CN104376187B - A kind of construction method of the intermediate dummy body form based on reverse Engineering Technology - Google Patents
A kind of construction method of the intermediate dummy body form based on reverse Engineering Technology Download PDFInfo
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Abstract
The present invention relates to a kind of construction method of the intermediate dummy body form based on reverse Engineering Technology, including：The three-dimensional (3 D) manikin of certain age bracket human body of certain sample size is selected, each spot size of three-dimensional (3 D) manikin is measured, suitable model is screened as data basis；Manikin is cut into multiple horizontal cross-sections, and angularly splits section counterclockwise using the center of horizontal cross-section as origin, sectional profile curve lin is divided into uniform point cloud；Layering is carried out to each model and takes characteristic point, characteristic point is converted into three dimensional space coordinate；Coordinate equalization to the same characteristic point in same position, and on the symmetrical axial symmetry of human body, generate the age bracket intermediate 3 D human body point cloud matrix；Point cloud matrix is imported into reverse engineering software, three-dimensional grid model is generated, is finally fitted to nurbs surface.The present invention sets up the time for shortening model foundation using reverse Engineering Technology dummy body form.
Description
Technical field
The present invention relates to human engineering of clothing technical field, more particularly to a kind of centre based on reverse Engineering Technology
The construction method of body dummy body form.
Background technology
The development of internet changes the life style and consumption pattern of people, and the garment virtual fitting based on MTM is more next
Be applied to more clothes it is customized in.With clothes digital development, on the one hand due to age differences, individual difference,
The size difference of the reason person to person such as domain difference, racial difference is larger, and one side garment production makes will to human somatotype classification
Ask increasingly thinner, people are to clothes zoarium degree and the requirement more and more higher of comfort level.Clothes are customized or as 21 century
Important trend, dummy body form is conducive to fit degree and the U.S. for helping people remotely to experience clothes on the internet by dummy body form
The property seen.Existing dummy body form construction method has：
The method for building up of the industrial people's platform of the Publication No. CN101912169A clothes three-dimensional cutting with quantity of margin
(2010) the 3 D human body upper part of the body data using certain age bracket, the middle volume data obtained using statistical analysis as foundation,
Quantity of margin when wearing clothes is added on 3 D human body, the clothes upper part of the body clothes form with quantity of margin is set up.The invention
It disclosure satisfy that demand of the designer for coat garment moulding.Entity people platform is bonded after ABS material 3 D-printing.
Publication No. CN101013508A Divisional combined three-dimensional parameters number people's platform construction method (2007) root
The main parts of description human body curved surface features are selected according to anthropometric data, are classified by the curvilinear characteristic of each main parts,
Different classes of main parts independent assortment is constituted into whole man's platform.On feature degree of enclosing section of people's platform by partes corporis humani position
Multiple key point descriptions, each key point is obtained by regression equation, reaches the build and size by each position of parameter regulation
Purpose.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of intermediate dummy body form based on reverse Engineering Technology
Construction method, can set up the human body intermediate dummy body form for meeting a certain age bracket build.
The technical solution adopted for the present invention to solve the technical problems is：A kind of centre based on reverse Engineering Technology is provided
The construction method of body dummy body form, comprises the following steps：
(1) three-dimensional (3 D) manikin of certain age bracket human body of certain sample size is selected, each portion of three-dimensional (3 D) manikin is measured
Position size, suitable model is screened as the basis of modeling as data basis；
(2) according to point cloud density degree during body scans, manikin is cut into multiple horizontal cross-sections, and with level
The center in section is that origin angularly splits section counterclockwise, and sectional profile curve lin is divided into uniform point cloud, completed to people
The decomposition of body Model；
(3) layering is carried out to each model and takes characteristic point, characteristic point is converted into three dimensional space coordinate；
(4) to the coordinate equalization of the same characteristic point in same position, and on the symmetrical axial symmetry of human body, the age bracket is generated
Intermediate 3 D human body point cloud matrix；
(5) point cloud matrix is imported into reverse engineering software, generates three-dimensional grid model, be finally fitted to nurbs surface, seal
It is an entity to close nurbs surface, so as to complete intermediate three-dimensional (3 D) manikin.
Manikin is cut into 90 horizontal cross-sections in the step (2).
The model of intermediate is built according to the form of m * n matrix in the step (4), by the every of each threedimensional model
The three-dimensional feature value of one layer of each upper characteristic point is averaged, and is built intermediate model point cloud matrix, is obtainedWherein,Represent jth name model's n-th layer K points, Ijn(Δxjn,Δyjn, 0) represent jth name model's n-th layer center
Offset.
Human body symmetry axis symmetrical treatment includes the point cloud symmetrical treatment of trunk and lower limb in the step (4).
The point cloud symmetrical treatment of the lower limb need to be only extracted where the three dimensional point cloud of human body right lower extremity, human body central shaft
Plane is as ymmetry center plane, and human body left lower extremity is symmetrical on Y-axis with right lower extremity, any data point and its bottom right on left lower extremity
The X-coordinate of limb character pair point opposite number each other；Wherein, X-axis is the transverse axis of ymmetry center plane, and Y-axis is ymmetry center plane
The longitudinal axis.
Beneficial effect
As a result of above-mentioned technical scheme, the present invention compared with prior art, has the following advantages that and actively imitated
Really：
The principle of body-face-line-point-line-face-body in reverse-engineering is applied to clothes by the modeling method of the present invention
Fill Human Modeling in, realize from the point cloud on real human body-human body physical model-people's body section-cross section curve-curve-
Point cloud coordinate handle-rearrange after point cloud-three-dimensional grid model-nurbs surface-physical model this process, profit
The time that model is set up that shortens is set up with reverse Engineering Technology dummy body form, is had important practical significance and economic value.
The present invention realizes the structure of intermediate three-dimensional virtual human platform, can be widely applied to Clothes dress model design and fabrication, three
The fields such as virtual fitting and human engineering in the development and application of dimension CAD of Garment software, custom made clothing.
Brief description of the drawings
Fig. 1 is that human body lower body of the present invention is divided into 51 layers of schematic diagram；
Fig. 2 is point coordinate diagrams such as each layer cross section isogonism of the invention；
Fig. 3 is the section before symmetrization of the present invention is handled；
Fig. 4 is the section after symmetrization processing of the present invention.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
Embodiments of the present invention are related to a kind of construction method of the intermediate dummy body form based on reverse Engineering Technology, bag
Include following steps：The three-dimensional (3 D) manikin of certain age bracket human body of certain sample size is selected, each portion of three-dimensional (3 D) manikin is measured
Position size, suitable model is screened as the basis of modeling as data basis；According to point cloud density journey during body scans
Degree, multiple horizontal cross-sections are cut into by manikin, and angularly split section counterclockwise using the center of horizontal cross-section as origin,
Sectional profile curve lin is divided into uniform point cloud, the decomposition to manikin is completed；Layering is carried out to each model and takes feature
Point, three dimensional space coordinate is converted into by characteristic point；Coordinate equalization to the same characteristic point in same position, and it is symmetrical on human body
Axial symmetry, generates the age bracket intermediate 3 D human body point cloud matrix；Point cloud matrix is imported into reverse engineering software, generation is three-dimensional
Grid model, is finally fitted to nurbs surface, closing nurbs surface is an entity, so as to complete intermediate 3 D human body
Model.
The present invention is further illustrated with a specific embodiment below.
Step 1, the three-dimensional (3 D) manikin for selecting 200 18-25 Sui young womens, denoising, filling-up hole and light are carried out to model
Along processing, and the human body parts of needs are extracted, measure the size at each position, the age bracket intermediate is obtained as data basis
The data characteristics at each position.
Step 2, the model for having screened 15 every close middle volume datas of body indexs, according to point cloud during body scans
Density degree, multiple horizontal cross-sections are cut into by manikin, and trunk is more slightly larger than the point cloud density of lower limb as shown in Figure 1,
Partial dot cloud close to anklebone is most intensive, in order at utmost close to manikin point cloud density actual conditions, by human body point 90
Layer.
Step 3, using the center of horizontal cross-section as origin angularly split section counterclockwise, sectional profile curve lin is divided into
Uniform point cloud, completes the decomposition to manikin.As shown in Fig. 2 being using horizontal X axle positive direction as the intersection point with cross section curve
No. 1 point, numbered counter-clockwise, final No. 61 points are overlapped with No. 1 point.
Step 4,61 characteristic points of each layer cross section are converted into three dimensional space coordinate.Each model has a correspondence
3 D human body point cloud matrix, see formula (1).Wherein n is the number of plies where point coordinates, and K is the points of every layer of coordinate, every layer
Z coordinate is all identical, in formulaRepresent the k-th point coordinates of n-th layer.
Step 5, due to reasons such as stance or instrumental systematic errors, the central point of each layer cross section of trunk might have micro-
The skew laughed at.Z-direction is due to being short transverse, without deviation.In order to reduce the later stage set up in the middle of body Model error, it is necessary to
Center is adjusted at new 0 point, the coordinates matrix after adjustment is shown in formula (2), wherein Δ In(Δxn,Δyn, 0) represent in n-th layer
The offset that the heart needs.
Step 6, the coordinate equalization to the same characteristic point in same position, and on the symmetrical axial symmetry of human body, generate the year
Age section intermediate point cloud matrix.The model of intermediate is built according to the form of m * n matrix, by each three-dimensional after adjustment coordinate
The three-dimensional feature value of each characteristic point is averaged on each layer of model, rebuilds intermediate model point cloud matrix, such as
Shown in formula (3).WhereinRepresent the j model's n-th layer K points, Ijn(Δxjn,Δyjn, 0) and represent jth name
The center offset of model's n-th layer.
Step 7, human body regarded as to hit exactly symmetrical body of the sagittal plane as symmetry axis, on the basis of the right side of human body,
The main point cloud symmetrical treatment including trunk and lower limb of symmetrization processing, implementation steps are as follows：
Step 7.1, trunk section symmetrical treatment.
Trunk section on Y-axis it is symmetrical after, the 1st point and the 31st point are located in X-axis, and on Y-axis pair
Claim；16th point and the 46th point are located in Y-axis, and are the front-rear center point of human body cross section.
There is x31=-x1, y31=y1；16th point and the 46th point are located in Y-axis, and are the front-rear center of human body cross section
Point；2nd point with it is symmetrical on Y-axis with 30 points, the 32nd point and the 60th point are symmetrical on Y-axis.Have the like, for
1st~31 point, n-th point symmetrical on Y-axis with the 32-n point, there is xn=-x32-n, yn=y32-n；For the 32nd to the 60th
Individual, n-th point symmetrically has x with the 92-n point on Y-axisn=-x92-n, yn=y92-n；The calculating of human body symmetrization processing is public
Formula is as follows：
Step 7.2, lower limb symmetrical treatment
Plane is as right where lower limb symmetrical treatment need to only extract the three dimensional point cloud of human body right lower extremity, human body central shaft
Claim central plane, human body left lower extremity is symmetrical on Y-axis with right lower extremity, any data point and its right lower extremity character pair on left lower extremity
The X-coordinate opposite number each other of point, the constant point coordinates formula of Y, Z coordinate is as follows：xL=-xR, yL=yR, zL=zR.Fig. 3 and Fig. 4 are
Contrasted before symmetrical treatment with symmetrical treatment descendant body section.
Step 8, finally by the intermediate three-dimensional point cloud handled well import reverse engineering software in, build three-dimensional grid model
Final to be fitted to nurbs surface, closing nurbs surface is an entity, so as to complete intermediate three-dimensional (3 D) manikin.
Claims (4)
1. a kind of construction method of the intermediate dummy body form based on reverse Engineering Technology, it is characterised in that comprise the following steps：
(1) three-dimensional (3 D) manikin of certain age bracket human body of certain sample size is selected, each position chi of three-dimensional (3 D) manikin is measured
It is very little, suitable model is screened as the basis of modeling as data basis；
(2) according to point cloud density degree during body scans, manikin is cut into multiple horizontal cross-sections, and with horizontal cross-section
Center angularly split section counterclockwise for origin, sectional profile curve lin is divided into uniform point cloud, completed to human mould
The decomposition of type；
(3) layering is carried out to each model and takes characteristic point, characteristic point is converted into three dimensional space coordinate；
(4) to the coordinate equalization of the same characteristic point in same position, and on the symmetrical axial symmetry of human body, generate in the middle of the age bracket
Body 3 D human body point cloud matrix；In the step (4) according to m * n matrix form build intermediate model, by each three
The three-dimensional feature value of each characteristic point is averaged on each layer of dimension module, is built intermediate model point cloud matrix, is obtainedWherein,Represent jth name model's n-th layer K points, Ijn(Δxjn,Δyjn, 0) represent jth name model's n-th layer center
Offset；
(5) point cloud matrix is imported into reverse engineering software, generates three-dimensional grid model, be finally fitted to nurbs surface, close
Nurbs surface is an entity, so as to complete intermediate three-dimensional (3 D) manikin.
2. the construction method of the intermediate dummy body form according to claim 1 based on reverse Engineering Technology, its feature exists
In manikin is cut into 90 horizontal cross-sections in the step (2).
3. the construction method of the intermediate dummy body form according to claim 1 based on reverse Engineering Technology, its feature exists
In human body symmetry axis symmetrical treatment includes the point cloud symmetrical treatment of trunk and lower limb in the step (4).
4. the construction method of the intermediate dummy body form according to claim 3 based on reverse Engineering Technology, its feature exists
In the point cloud symmetrical treatment of the lower limb need to only extract plane where the three dimensional point cloud of human body right lower extremity, human body central shaft
As ymmetry center plane, human body left lower extremity is symmetrical on Y-axis with right lower extremity, any data point and its right lower extremity pair on left lower extremity
Answer the X-coordinate of characteristic point opposite number each other；Wherein, X-axis is the transverse axis of ymmetry center plane, and Y-axis is the vertical of ymmetry center plane
Axle.
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| CN107123162B (en) * | 2016-02-24 | 2020-02-21 | 中国科学院沈阳自动化研究所 | Three-dimensional environment surface triangular mesh construction method based on two-dimensional laser sensor |
| CN105913486A (en) * | 2016-04-08 | 2016-08-31 | 东华大学 | Digital mixing human body rapid modeling method applied to apparel industries |
| CN105976406B (en) * | 2016-04-26 | 2019-04-23 | 上海时元互联网科技有限公司 | Measuring system, measuring device and foot shape measurement method and system |
| CN107577833B (en) * | 2017-07-10 | 2022-05-17 | 北京服装学院 | Digital design method of three-dimensional prototype clothes |
| CN108053480B (en) * | 2017-12-08 | 2021-03-19 | 东华大学 | Three-dimensional full-scale dressing human body mesh construction method based on reverse engineering technology |
| CN108335180B (en) * | 2018-04-18 | 2021-11-05 | 苏州大学 | Method for checking digital human body figure for clothing |
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