CN103690172A - Method for measuring volumes of breasts - Google Patents
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- CN103690172A CN103690172A CN201310745819.6A CN201310745819A CN103690172A CN 103690172 A CN103690172 A CN 103690172A CN 201310745819 A CN201310745819 A CN 201310745819A CN 103690172 A CN103690172 A CN 103690172A
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Abstract
The invention discloses a method for measuring the volumes of breasts. The method includes steps of S1, scanning three-dimensional models of female bodies to acquire data, processing the data and extracting three-dimensional models of human trunks from the data; S2, processing data of the three-dimensional models of the human trunks to extract three-dimensional models of the surfaces of the breasts from the data; S3, building three-dimensional models of bottom curved surfaces of the breasts according to the shapes of the ribs where the bottoms of the breasts are located, hermetically combining the three-dimensional models of the bottom curved surfaces of the breasts with the three-dimensional models of the surfaces of the breasts to acquire three-dimensional models of to-be-measured zones of the breasts, and acquiring the volumes of the three-dimensional models of the to-be-measured zones of the breasts by means of computation. The method has the advantage that the volumes of the breasts can be conveniently, quickly and accurately measured without contact with the human bodies.
Description
Technical field
The present invention relates to somatometry technical field, relate in particular to a kind of breast volume measurement method.
Background technology
In apparel industry especially underwear industry, the comfortableness close ties of this factor of breast volume and clothes, especially the zoarium of bra cup is comfortable has close relationship with volume breast, the volume that only has the appearance profile line of cup and can hold is all consistent with human breast, and bra just can be taken into account comfortable and attractive in appearance.Therefore profile and the volume of measuring objectively breast are very important to designing and producing of underwear, and the edge of effectively determining breast is to measure exactly its volume, design the prerequisite with the more fit comfortable bra of appropriate volume.Because the border of breast is difficult for accurately defining by body surface, and breast bottom rides on chest rib curved surface, therefore, is difficult to its volume to carry out Measurement accuracy, increased to a great extent the difficulty of research.
For the judgement of breast area and the measurement of volume, for a long time, various circles of society be devoted to find always a kind of easily and fast, accurate and reproducible measuring method.Mainly contain following several method:
(1) empirical equation method: outfit is ruler, tape measure.Measurement index is measured upper chest measurement (measuring through oxter), chest measurement (through nipple the most plentiful place measurement), chest measurement poor (upper chest measurement-chest measurement), breast radius, breast height for founding position or seat.
Computing formula: breast volume=1/3 π * breast height 2 * (3 * breast radius-breast height), or,
Breast volume=250+50 * chest measurement is poor+20 * overweight body weight, or
Breast volume=2145.32-11.4069 * height (standard body weight), or
Breast volume=1874.268-9.254 * height (overweight), or
Breast volume=9.074 * height-134.18
The unit of wherein going up chest measurement, chest measurement, breast radius and height is cm, and volume unit is ml, and body weight unit is kg.
The method principle is simple, random large, and rough estimate is accurate not.
(2) die methods: the feature of die methods is that the principle of having applied water, air, sand volumes displacement is measured the volume of breast.Can make the plaster model of breast, the volume of breast is calculated and analyzed to the sand volumes of filling up this model by calculating.Or copy the form of chest and fill with water with thermoplastic material thin slice, the volume of water is breast volume.But these methods are all that chest bottom is considered as to horizontal plane, a but not complicated curved surface that relies on chest rib, therefore the volume data obtaining not is the concept of the complete volume in absolute sense, and while mould is close to degree from breast and is subject to the interference from different thorax forms.
(3) ultrasonic measurement art: using ultrasound digital still gray scale scanning is popped one's head in, and breast is carried out to crosscut or rip cutting and scan, and clearance distance is 1cm.Require planar range to comprise all breast tissues that probe can be identified, depth bounds comprises below skin corium, retromammary cellular space, more than the surperficial fascia of pectoralis major.Computing goes out each scanning slice area, then relies on each stacked adding to estimate breast volume.
This technical data computing is more loaded down with trivial details, and breast is irregular soft tissue, and the contact of ultrasonic probe is difficult to guarantee that the degree of crimp has or not impact to each measurement result.
(4) mr imaging technique: mr imaging technique concrete operation method is: tester gets prone position, and breast naturally droops, does cutting plane scan from pectoralis major plane to nipple, each planar thickness is selected in 0.5～1.0mm scope.Press each aspect stack reconstruction of three-dimensional stereo-picture, and can calculate the volume of each aspect and thickness thereof, then each layer of volume stack drawn to breast volume.Magnetic resonance three-dimensional solid images reconstruction technique is untouchable technology, and high to soft tissue resolution, degree of accuracy is high, reproducible, but needs special installation, somewhat expensive, and operating environment is complicated, and general test person is difficult to accept.
Above relevant breast area to define with the measuring method of volume be to be mainly used in Mammaplasty and breast medical domain, required precision is higher, and operator's professional technique is had relatively high expectations.
In addition, the application that the patent No. is 201310303382.0 discloses a kind of three-dimensional breast volume measuring method based on Grid Projection method, mainly comprises step:
Step 1, by 3D anthropometric scanning, obtain the three dimensional point cloud of Whole Body, each data has all comprised the surface information of triangle gridding, to in data, reject and form testing data point set with the uncorrelated data point of chest scope and noise, with chest peak, play beginning breadth first traversal, all testing data point layerings that testing data point is concentrated, for each testing data point, give a level attributes, the testing data point that is positioned at chest peak is the 0th grade, the like;
Whether step 2, each testing data point of concentrating according to four boundary control points judgement testing data points on breast border in 3D anthropometric scanning data belong to chest region to be measured, and the curved surfaces that all testing data points that belong to chest region to be measured form are breast curved surface to be measured;
Step 3, employing planar interception mode are sealed breast curved surface to be measured, obtain breast area to be measured;
Step 4, adopt Grid Projection method to utilize the surface information of the triangle gridding that each data point comprises to calculate the volume of breast area to be measured.
But the application that the patent No. is 201310303382.0 adopts planar interception mode to seal breast curved surface to be measured, does not consider that human breast bottom surface is irregular rib, therefore, the breast volume of measurement is also not accurate enough.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of breast volume measurement method is provided, and its object is by not contacting human body, convenient, to measure fast and accurately breast volume.
In order to solve the problems of the technologies described above, the invention discloses a kind of breast volume measurement method, comprise step:
S1, the female body threedimensional model obtaining by scanning is carried out to date processing, and therefrom extract the threedimensional model of trunk;
S2, the threedimensional model of described trunk is carried out to date processing, thereby extract the threedimensional model of breast surface;
S3, according to the rib shape at place, breast bottom, build breast end curved surface threedimensional model, and the threedimensional model of described breast end curved surface threedimensional model and described breast surface is sealed in conjunction with the threedimensional model that obtains airtight breast area to be measured, afterwards by calculating the volume of the threedimensional model of described breast area to be measured.
Further, described step S1 specifically comprises step:
S11, employing spatial digitizer scanning female body surface, obtain described human 3d model;
S12, extract the cloud data of described human 3d model;
S13, the cloud data that described step S12 is extracted carry out date processing, specifically comprise denoising point, data interpolation and removal and the incoherent part of human chest;
The data through date processing that S14, employing NURBS modeling technique obtain described step S13 are carried out three-dimensional modeling, thereby obtain the threedimensional model of described trunk.
Wherein, described spatial digitizer preferably adopts U.S. TC2 scanner, the data that the cloud data of described human 3d model preferably adopts the * .obj file format of described U.S. TC2 scanner to derive.
Wherein, described NURBS modeling preferably adopts reverse engineering software Polyworks software to realize.
Further, described step S2 specifically comprises step:
S21, find out eight breast border key points of the threedimensional model of described trunk;
S22, the curve that adopts smooth sealing connect described eight breast border key points, thereby define breast area;
S23, extract described breast area, thereby obtain described breast surface threedimensional model.
Wherein, described eight breast border key points are an A, put B, put C, put D, put E, put F, put G, put H, wherein, described some A is breast inner edge point, and some B is the mid point of profile camber line inside breast, point C is breast lower edge point, point D is the mid point of outside breast contour line, and some E is breast outer rim point, and some G was the intersection point of theligonum BP longitudinal section and upper BL BUST LINE, point F is for some E and put the mid point that G is connected camber line, and wherein said upper BL BUST LINE is the contour through left and right axil point level one circle.
Wherein, described some H determines by following steps:
S221, take theligonum as starting point, simultaneously perpendicular to the plane of crossing theligonum cross section and longitudinal section, towards the direction cutting at human body center, the facet of interval 5mm and body surface are crossing, obtain some curves on body surface;
S222, find out breast continuous curve in article one left and right in described some curves, be labeled as curve LineH;
S223, connect theligonum and neck den forming curves LineL, curve LineL and curve LineH intersect at an I, and before human body, centrage is given a K mutually with curve LineH, and some H is an above K and put curvature between I and change maximum point of curve LineH.
Wherein, in step S22, preferably adopt the IMEdit module of Polyworks reverse engineering software that described eight breast border key points are connected with smooth closed curve.
Further, described step S3 specifically comprises step:
S31, according to the rib shape at place, breast bottom, adopt composite type sealing model construction breast end curved surface threedimensional model;
S32, adopt comprehensive sealing mode to seal the threedimensional model that described breast end curved surface threedimensional model and described breast surface threedimensional model obtain described breast area to be measured;
S33, employing calculus calculate the volume of the threedimensional model of described breast area to be measured.
Wherein, in described step S33, preferably adopt Polyworks reverse engineering software IMEdit module by calculus, to calculate the volume of described breast threedimensional model to be measured.
Implement the present invention, there is following beneficial effect:
1, the present invention is based on 3-D scanning technology and obtain human 3d model, after determining breast area, according to breast end rib shape, build breast end curved surface threedimensional model, by breast end surface model sealing breast three-dimensional surface model, utilize reverse Engineering Technology to measure the volume of breast, make the low-cost human breast volume that gathers in enormous quantities become possibility, this factor of human breast volume is joined in bra cup structure design, make bra cup farthest be applicable to such build crowd's the fitness of wearing, met industrial demand.
2, the present invention measures the volume of three-dimensional breast model with reverse Engineering Technology, has avoided contact to measure and has easily caused distortion and inconvenience, and compared with the method for medical measurement breast volume, the method expense is relatively low in addition, and its certainty of measurement is applicable to garment industry.
3, the present invention is usingd electronics technology as the platform of measuring breast volume, and its measuring speed is fast, and cost is low, simple to operate, repeatable high.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic flow sheet of the breast volume measurement method of embodiment of the present invention proposition;
Fig. 2 is the idiographic flow schematic diagram of step S1 in Fig. 1;
Fig. 3 is the female body three-dimensional model diagram of scanning;
Fig. 4 is the point cloud model comparison diagram of the human 3d model before and after denoising point;
Fig. 5 is the comparison diagram of the human 3d model before and after filling-up hole;
Fig. 6 is the three-dimensional model diagram of described trunk;
Fig. 7 is the idiographic flow schematic diagram of step S2 in Fig. 1;
Fig. 8 is the three-dimensional model diagram of the breast surface that extracts of step S2;
Fig. 9 is eight breast border key point schematic diagrams that breast area defines;
Figure 10 is the schematic flow sheet of definite concrete steps that in Fig. 9, H is ordered;
Figure 11 is some curve synoptic diagrams on the human body that in Figure 10, step S221 obtains;
Figure 12 is the schematic diagram that in Figure 10, H is ordered;
Figure 13 is the idiographic flow schematic diagram of step S3 in Fig. 1.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of breast volume measurement method, as shown in Figure 1, comprise step:
S1, the female body threedimensional model obtaining by scanning is carried out to date processing, and therefrom extract the threedimensional model of trunk;
S2, the threedimensional model of described trunk is carried out to date processing, thereby extract the threedimensional model of breast surface;
S3, according to the rib shape at place, breast bottom, build breast end curved surface threedimensional model, and the threedimensional model of described breast end curved surface threedimensional model and described breast surface is sealed in conjunction with the threedimensional model that obtains airtight breast area to be measured, afterwards by calculating the volume of the threedimensional model of described breast area to be measured.
Further, as shown in Figure 2, described step S1 specifically comprises step:
S11, employing spatial digitizer scanning female body surface, obtain described human 3d model;
As shown in Figure 3, be the female body surface three dimension model of scanning, during scanning, measured body two lower limbs are upright, and bipod is slightly separately concordant with shoulder breadth, the slightly separated trunk of two arms, chest is in exposed state above the waist, and the lower part of the body is worn smallclothes;
S12, extract the cloud data of described human 3d model;
S13, the cloud data that described step S12 is extracted carry out date processing, specifically comprise denoising point, data interpolation and removal and the incoherent part of human chest;
Concrete steps are:
(1) denoising point: by cloud data formation curve curved surface, adopt half mutual automanual method for fairing to check adjustment to cloud data.If Fig. 4 is the point cloud model of the human 3d model of denoising point front and back;
(2) data interpolation: for instrument scanning less than place, by the method for data interpolation, carry out polishing leak.Utilize the surface fitting technology based on point to carry out leak polishing herein.Fig. 5 is the human 3d model before and after filling-up hole;
(4) remove and the incoherent part of human chest: human 3d model comprises right lower limb, left lower limb, trunk, right arm, the right hand, left arm, left hand.For improving data processing rate, six parts of the right lower limb, left lower limb, right arm, the right hand, left arm, the left hand that have nothing to do with chest on human body are deleted, only leave torso portion;
The data through date processing that S14, employing NURBS modeling technique obtain described step S13 are carried out three-dimensional modeling, thereby obtain the threedimensional model of described trunk, as shown in Figure 6;
Wherein, NURBS is the english abbreviation of Non-Uniform Rational B-Splines, i.e. " the reasonable B batten of non-unification ".NURBS is a kind of formative method of specialize curved face object, NURBS moulding is defined by curve and curved surface, therefore, adopt the data through date processing that NURBS modeling technique obtains described step S13 to carry out three-dimensional modeling herein, and NURBS modeling preferably adopt reverse engineering software Polyworks software to realize.In reverse-engineering, PolyWorks is one of classic Point Cloud Processing software in the market, and it is produced by Canadian InnovMetric company, and many leading automobiles, aeronautical manufacture commercial city are its clients in the world.Polyworks mainly comprises Polyworks/Modeler and the large functional software bag of Polyworks/Inspector two, the former is for a cloud modeling, the latter processes and measures for some cloud, Polyworks/Modeler carries out the cloud data of scanning whole, splicing, triangular facet etc. are processed and built three-dimensional entity model, Polyworks/Inspector built model be optimized, measurement, deformation analysis, report generation etc. complete various requirement of engineering.Polyworks10.0 version software comprises the eight large functional modules such as IMAlign, IMEdit, IMInspect.
Wherein, described spatial digitizer preferably adopts U.S. TC2 scanner, the data that the cloud data of described human 3d model preferably adopts the * .obj file format of described U.S. TC2 scanner to derive, the file that can derive the forms such as * .wrl, * .obj from TC2 scanning system, wherein the file precision of * .obj form is higher.
Further, as shown in Figure 7, described step S2 specifically comprises step:
S21, find out eight breast border key points of the threedimensional model of described trunk;
S22, the curve that adopts smooth sealing connect described eight breast border key points, thereby define breast area;
S23, extract described breast area, thereby obtain described breast surface threedimensional model, specifically as shown in Figure 8.
Wherein, as shown in Figure 9, described eight breast border key points are an A, put B, put C, put D, put E, put F, put G, put H, wherein, described some A is breast inner edge point, point B is the mid point of profile camber line inside breast, point C is breast lower edge point, point D is the mid point of outside breast contour line, point E is breast outer rim point, point G was the intersection point of theligonum BP longitudinal section and upper BL BUST LINE, and some F is for some E and put the mid point that G is connected camber line, and wherein said upper BL BUST LINE is the contour through left and right axil point level one circle.
Wherein, as shown in figure 10, described some H determines by following steps:
S221, take theligonum BP as starting point, simultaneously perpendicular to the plane of crossing theligonum cross section and longitudinal section, towards the direction cutting at human body center, the facet of interval 5mm and body surface are crossing, obtain some curves on body surface; As shown in figure 11;
S222, find out breast continuous curve in article one left and right in described some curves, be labeled as curve LineH, as shown in figure 12;
S223, connection theligonum BP and neck den FNP forming curves LineL, curve LineL and curve LineH intersect at an I, before human body, centrage is given a K mutually with curve LineH, and some H is that between curve LineH upper some K and some I, curvature changes maximum point, as shown in figure 12.
Wherein, in step S22, preferably adopt the IMEdit module of Polyworks reverse engineering software that described eight breast border key points are connected with smooth closed curve.
Further, as shown in figure 13, described step S3 specifically comprises step:
S31, according to the rib shape at place, breast bottom, adopt composite type sealing model construction breast end curved surface threedimensional model;
S32, adopt comprehensive sealing mode to seal the threedimensional model that described breast end curved surface threedimensional model and described breast surface threedimensional model obtain described breast area to be measured;
S33, employing calculus calculate the volume of the threedimensional model of described breast area to be measured.
Wherein, in described step S33, preferably adopt Polyworks reverse engineering software IMEdit module by calculus, to calculate the volume of described breast threedimensional model to be measured, during measurement volumes, the operation principle of software is: breast model is longitudinally cut into very thin aspect, be called unit, slice numbers is larger, cut apart carefullyyer, the volumetric errors of obtaining is less, and each model slice number is for being preferably 10,000.Take out wherein one deck, again this layer is divided into the sub-cell of condition of equivalent thickness, because each unit is very little, use computer integral operation principle, our visual each unit floor space is Amm
2vertical cyclindrical shape.Each unit slice Volum=Σ Amm
2* H
n, H herein
nwhat be point on n sub-cell vertical curve to breast area back bodice curve Z coordinate data is poor.Breast volume is tried to achieve by unit stack, so breast volume Breast Volum=Σ Slice Volumn.
The method proposing according to the present invention is tested to precision of the present invention after measuring breast volume.The method of inspection is: for the accuracy of checking measurements value, the present invention finds the volunteer of 5 different builds, under the state of nude, uses 3D anthropometric scanning.The volume of measuring breast according to the breast volume measurement method of above introduction is the volume of breast threedimensional model.Delimitation method according to breast area described in invention sketches out breast area on volunteer's body surface, according to delineating the softening mammary surface that sticks on of plaster bandage immersion for region, after rapid draing, from body surface, take off, obtain the plaster model of breast, then the volume that fine sand exchanges plaster model for is the volume of breast plaster model.Using the volume of plaster model as actual value, be analyzed with the volume of threedimensional model, the precision of check software measurement result.
Wherein, obtaining mainly of testing data comprises the following steps:
(1) 3D anthropometric scanning.With U.S. TC2 spatial digitizer, scan human body volunteer's upper body nude in the situation that, obtain 3 D human body cloud data.
(2) measure the volume of breast threedimensional model.Human body three-dimensional cloud data is imported to reverse engineering software Polyworks, according to the delimitation method of breast area, tick breast area, measure the volume of breast threedimensional model.
(3) at body surface, delineate breast contour line.Measured stands naturally, according to the division methods of breast area, and plotted point A, B, C, D, E, F, G, H, finally sketches out breast contour line.
(4) apply medical bandage, isolation human body skin.In order to prevent that Gypsum Fibrosum from directly contacting human body skin, in the region that need to apply plaster bandage, apply medical bandage and separate, on binder, again sketch out the contour line of breast, with medical proof fabric, glue.
(5) apply plaster bandage, obtain plaster model.Plaster bandage is cut into width, the applicable strip of length, and the softening rear flattening note of warm water that is dipped in 45 ℃ spreads on and the outer position of ticking of binder, needs to paste 3-5 layer.The principle of plaster splint width, length is that the position that curvature is large requires plaster splint narrow, short, and accurate to reach curvature, the little smooth mild position of curvature requires plaster splint slightly wide, long.Skin at plaster bandage is enclosed hospital gauze, prevents that plaster model from powdering away after dry, shapes with medical proof fabric.
(6) take off plaster model.With hair-dryer, blow plaster model 15-20 minute, make plaster model hardening sizing, until model dry qualitative after, take off model.
(7) measuring model is volume.At model inwall, enclose one deck preservative film, the model reverse side of avoiding making dirty.Model is filled with to fine sand, the sand in model is poured in beaker, then with graduated cylinder, measure the volume of the vertical sand of beaker.
(8) volume of 5 volunteer's breast threedimensional models and the volume of plaster model are contrasted, the volume of supposing plaster model is actual value, and the measured value of reverse-engineering threedimensional model is measured value, the relative error between checking measurements value and actual value.
Table 1 is the measured value of 5 volunteer's breast threedimensional model volumes, plaster model volume, suppose that the volume that plaster model is surveyed is decided to be actual value, volume that threedimensional model is surveyed is measured value, absolute error=measured value deducts actual value, the absolute value of relative error=[(measured value-actual value)/actual value] * 100.
Table 1 breast volume testing data unit is (ml)
From table 1, can see, absolute error value scope is between-23.84～17.40, relative error range is 0.76%～4.67%, such precision requires relatively low field to be expected to obtain practice and application in as apparel industry at some, especially in bra design, this measuring method has breast deformation and the easy advantage that obtains mass data of avoiding contact measurement to cause.
Implement the embodiment of the present invention, there is following beneficial effect:
1, the present invention is based on 3-D scanning technology and obtain human 3d model, after determining breast area, according to breast end rib shape, build breast end curved surface threedimensional model, by breast end curved surface threedimensional model sealing breast three-dimensional surface model, utilize reverse Engineering Technology to measure the volume of breast, make the low-cost human breast volume that gathers in enormous quantities become possibility, this factor of human breast volume is joined in bra cup structure design, make bra cup farthest be applicable to such build crowd's the fitness of wearing, met industrial demand.
2, the present invention measures the volume of three-dimensional breast model with reverse Engineering Technology, has avoided contact to measure and has easily caused distortion and inconvenience, and compared with the method for medical measurement breast volume, the method expense is relatively low in addition, and its certainty of measurement is applicable to garment industry.
3, the present invention is usingd electronics technology as the platform of measuring breast volume, and its measuring speed is fast, and cost is low, simple to operate, repeatable high.
Above disclosed is only a kind of preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to the claims in the present invention, still belongs to the scope that the present invention is contained.
Claims (10)
1. a breast volume measurement method, is characterized in that, comprises step:
S1, the female body threedimensional model obtaining by scanning is carried out to date processing, and therefrom extract the threedimensional model of trunk;
S2, the threedimensional model of described trunk is carried out to date processing, thereby extract the threedimensional model of breast surface;
S3, according to the rib shape at place, breast bottom, build breast end curved surface threedimensional model, and the threedimensional model of described breast end curved surface threedimensional model and described breast surface is sealed in conjunction with the threedimensional model that obtains airtight breast area to be measured, afterwards by calculating the volume of the threedimensional model of described breast area to be measured.
2. breast volume measurement method as claimed in claim 1, is characterized in that, described step S1 specifically comprises step:
S11, employing spatial digitizer scanning female body surface, obtain described human 3d model;
S12, extract the cloud data of described human 3d model;
S13, the cloud data that described step S12 is extracted carry out date processing, specifically comprise denoising point, data interpolation and removal and the incoherent part of human chest;
The data through date processing that S14, employing NURBS modeling technique obtain described step S13 are carried out three-dimensional modeling, thereby obtain the threedimensional model of described trunk.
3. breast volume measurement method as claimed in claim 2, it is characterized in that, described spatial digitizer preferably adopts U.S. TC2 scanner, the data that the cloud data of described human 3d model preferably adopts the * .obj file format of described U.S. TC2 scanner to derive.
4. breast volume measurement method as claimed in claim 2, is characterized in that, described NURBS modeling preferably adopts reverse engineering software Polyworks software to realize.
5. breast volume measurement method as claimed in claim 1, is characterized in that, described step S2 specifically comprises step:
S21, find out eight breast border key points of the threedimensional model of described trunk;
S22, the curve that adopts smooth sealing connect described eight breast border key points, thereby define breast area;
S23, extract described breast area, thereby obtain described breast surface threedimensional model.
6. breast volume measurement method as claimed in claim 5, it is characterized in that, described eight breast border key points are an A, put B, put C, put D, put E, put F, put G, put H, wherein, described some A is breast inner edge point, point B is the mid point of profile camber line inside breast, point C is breast lower edge point, point D is the mid point of outside breast contour line, point E is breast outer rim point, point G was the intersection point of theligonum longitudinal section and upper BL BUST LINE, and some F is for some E and put the mid point that G is connected camber line, and wherein said upper BL BUST LINE is the contour through left and right axil point level one circle.
7. breast volume measurement method as claimed in claim 6, is characterized in that, described H point is determined by following steps:
S221, take theligonum as starting point, simultaneously perpendicular to the plane of crossing theligonum cross section and longitudinal section, towards the direction cutting at human body center, the facet of interval 5mm and body surface are crossing, obtain some curves on body surface;
S222, find out breast continuous curve in article one left and right in described some curves, be labeled as curve LineH;
S223, connect theligonum and neck den forming curves LineL, curve LineL and curve LineH intersect at an I, and before human body, centrage is given a K mutually with curve LineH, and some H is an above K and put curvature between I and change maximum point of curve LineH.
8. breast volume measurement method as claimed in claim 5, is characterized in that, preferably adopts the IMEdit module of Polyworks reverse engineering software that described eight breast border key points are connected with smooth closed curve in step S22.
9. breast volume measurement method as claimed in claim 1, is characterized in that, described step S3 specifically comprises step:
S31, according to the rib shape at place, breast bottom, adopt composite type sealing model construction breast end curved surface threedimensional model;
S32, adopt comprehensive sealing mode to seal the threedimensional model that described breast end curved surface threedimensional model and described breast surface threedimensional model obtain described breast area to be measured;
S33, employing calculus calculate the volume of the threedimensional model of described breast area to be measured.
10. breast volume measurement method as claimed in claim 9, is characterized in that, preferably adopts Polyworks reverse engineering software IMEdit module by calculus, to calculate the volume of described breast threedimensional model to be measured in described step S33.
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| CN106225677A (en) * | 2016-09-26 | 2016-12-14 | 广西科技大学 | Automobile engine cylinder head combustion chamber volume measuring method |
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