CN108399651B - Human body hair style three-dimensional modeling and model multiplexing method - Google Patents
Human body hair style three-dimensional modeling and model multiplexing method Download PDFInfo
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Abstract
The invention discloses a method for three-dimensional modeling and model multiplexing of a human body hairstyle, which belongs to the field of hairstyle design, wherein a hairstyle model head three-dimensional positioning model and a scalp state model are established, information acquisition modeling is carried out on the corresponding hairstyle of the head of the hairstyle model, corresponding correction parameters are determined to adjust the hairstyle three-dimensional model through comparison of scalp state information in the hairstyle model head three-dimensional positioning model and the hairstyle model head three-dimensional positioning model of a multiplexer, a hairstyle three-dimensional model adaptive to the head of the hairstyle multiplexer is generated, and the hairstyle multiplexing on the same individual or different individuals is completed. The method for three-dimensional modeling and model multiplexing of the human body hairstyle has the advantages that the hairstyle model is simple to establish and multiplex, the operation is simple and convenient, the reality of hairstyle design and multiplexing is greatly improved, once the hairstyle model and the three-dimensional positioning model of the human body head are established, the hairstyle model can be repeatedly used for many times, the hairstyle design cost is greatly reduced, and the application and popularization values are great.
Description
Technical Field
The invention belongs to the field of hairstyle design, and particularly relates to a human body hairstyle three-dimensional modeling and model multiplexing method.
Background
With the continuous improvement of living standard of people, the requirement of people on hairstyle is higher and higher, the hairstyle is not only limited to the simple living requirement in the past, but also has higher requirement on the hairstyle, different personalities and different aesthetic standards are required to be reflected, and the purpose of improving personal quality, image and charm is achieved.
Hair styling is a comprehensive art which involves a variety of factors, such as the human head, face, sense organs, stature, age, etc., as well as the individual's occupation, complexion, dressing, personal taste, season, hair quality, applicability, and age. In addition, the hairstyle design of the human body is also influenced by the head state of the human body, and different head states have larger difference for the same hairstyle; therefore, in designing a hair style, a combination of factors is needed.
In the prior art, the presentation of the hair style is often realized by means of hair stylists or hairdressers, and the presentation of the hair style by each hair stylist or hairdresser is influenced by the technical skill and the working state of the hair stylist or hairdresser, so that certain differences are often generated in the process of presenting the same hair style for multiple times, and particularly, when the same hair style is applied to different head styles, the differences are particularly obvious, which inevitably reduces the accuracy of hair style reuse.
Although some hair style design software exists in the prior art, people can be helped to realize on-line design of a hair style, for example, uploading an image or taking a picture on the internet, performing a series of hair style designs, and allowing a designer to print out or write down a serial number of the hair style, and then, the designer can refer to the design after arriving at a barbershop. However, most of hairstyle design software in the prior art applies a designed hairstyle model, and often lacks support of data such as individual head shape, scalp and hair, or individual data is not comprehensive, fine and specific, so that such hairstyle design can only be regarded as one hairstyle wearing, the designed hairstyle model is worn on the head just like a hat, and lacks reality, and the hairstyle and the individual head shape often cannot be fully attached, and the human head shape is different, so that the effect of matching the hairstyle often differs greatly from the actual situation. Furthermore, the data of hair distribution, quantity, thickness, luster, softness, elasticity and the like of each individual head are different, and a hairstyle model designed according to one individual is difficult to completely reproduce on the head of another individual. Therefore, when an individual designs and selects a hairstyle through the current hairstyle design software, it is often difficult to accurately determine whether data such as his own head shape and hair meets the conditions of the hairstyle model, determine whether the individual can trim the hairstyle on his head, and ensure that the effect between the trimmed hairstyle and the designed hairstyle is consistent.
Disclosure of Invention
In view of the above defects or improvement needs of the prior art, the present invention provides a method for three-dimensional modeling of human hair style and multiplexing of models, wherein a three-dimensional positioning model of the head of a hair style model and a scalp state model are established, information acquisition modeling is performed on the corresponding hair style of the head, and corresponding correction parameters are determined to adjust the three-dimensional hair style model by comparing the hair state difference between the three-dimensional positioning model of the head of a multiplexing user and the three-dimensional positioning model of the head of the hair style model, so as to generate a three-dimensional hair style model adapted to the head of the hair style multiplexing user, thereby effectively improving the accuracy of hair style modeling and the applicability of hair style multiplexing.
To achieve the above object, according to one aspect of the present invention, there is provided a method for three-dimensionally modeling a human hair style, which is used for three-dimensionally modeling a sample hair style on a human head with the sample hair style trimmed thereon, comprising the steps of:
s1: selecting a lower mandible point positioned at the lowest part of the lower mandible edge, a nose bridge point positioned at the most concave part of a nose bone and a point farthest from the lower mandible point, namely a back head top point, from the outer edge of a median sagittal plane of the head of the human body, determining a virtual central point in the head of the human body according to the distance relationship between the three points, and determining two axial points which are respectively arranged at two sides of the head of the human body and have connecting lines vertical to the median sagittal plane and pass through the virtual central point by using the virtual central point;
s2: at least one magnetic field source and a plurality of magnetic detectors are arranged on the outer edge of the median sagittal plane of the human head and two axial center points, the magnetic field source generates a magnetic field on the human head, and the plurality of magnetic detectors determine the relative position in the magnetic field;
s3: setting a detection probe capable of carrying out mobile positioning and detection at any position of the whole scalp part of the human head, wherein the detection probe is provided with a magnetic detector or a magnetic field source, so that the position information and scalp state information of the scalp part where the detection probe is positioned are fed back by the movement and detection of the detection probe at the whole scalp part of the human head, establishing a three-dimensional positioning model of the human head according to the acquired position information, and establishing a scalp state three-dimensional model according to the three-dimensional positioning model and the scalp state information;
s4: selecting characteristic main hairlines in each characteristic area of the sample hairstyle, collecting position parameters and characteristic information parameters of the characteristic main hairlines and correspondingly inputting the position parameters and the characteristic information parameters into the human head three-dimensional positioning model;
s5: and generating a plurality of main hairlines and auxiliary hairlines among the characteristic main hairlines in the three-dimensional positioning model of the human head, thereby forming the three-dimensional model of the hairstyle.
As a further improvement of the present invention, the scalp state information includes the position, number, density and health status of hair follicles in the scalp region where the detection probe is located, and the distribution, growth direction, number, density, diameter, color and health status of hairs in the corresponding hair follicles.
As a further improvement of the present invention, the collection of the characteristic main hair information may be accomplished by providing a detecting pen, which is hollow inside, and the front end of which is provided with a hair-catching hook or a hair-catching small claw that can be extended and retracted inside the detecting pen to catch or grab one or more hair hooks and pull them into the detecting pen, and detecting the position information of the tip and root of the characteristic main hair, the length, elasticity, softness, friction force of the hair, and color information of each section of the hair with a sensor provided on the detecting pen.
As a further improvement of the present invention, the method for determining the virtual center point is as follows:
connecting the mandible point and the back head top point to form a straight line, leading a ray from the nose bridge point to intersect with the straight line, moving the position of the intersection point until the distance between the intersection point and the nose bridge point is equal to the distance between the intersection point and the back head top point, and the intersection point is the virtual central point in the brain of the human head.
As a further improvement of the invention, the magnetic field source is arranged at the lower mandible point, and magnetic detectors are respectively arranged at the nose bridge point, the vertex of the back head and the two axle center points.
As a further improvement of the present invention, the detection probe is disposed on a circular arc-shaped guide rail, two ends of the guide rail are respectively disposed on two axial center points and can rotate around a connecting line of the axial center points to cover the whole scalp, and the detection probe can reciprocate in the guide rail, so that the positioning of the whole scalp of the human head and the collection of the scalp state can be realized through the reciprocating movement of the detection probe and the rotation of the guide rail.
In another aspect of the invention, the human body hair style three-dimensional model generated by the human body hair style three-dimensional modeling method is applied.
In another aspect of the present invention, the application of the three-dimensional model of human hair style comprises the following steps:
a1: establishing a three-dimensional head positioning model and a scalp state model of a person to be reused, and completing positioning at the whole scalp part of the head and collecting scalp state information;
a2: comparing the obtained scalp state three-dimensional model of the human head with the scalp state three-dimensional model of the head of the person to be reused and hairstyle according to the claim 1, and generating corresponding correction parameters, wherein the correction parameters are determined according to the difference between the head of the person to be reused and the human head of the sample hairstyle, the shape and the size, the hair density and the hair follicle growth angle, the distribution condition of the hair, the hair color, the hair diameter, the softness and the elasticity of the hair;
a3: and substituting the correction parameters into the human body hairstyle three-dimensional model for adjustment and correction to generate a hairstyle three-dimensional model matched with the head of the person to be reused, obtaining the hair length information of the scalp area corresponding to the head of the person to be reused after correction, and further realizing the reuse of the hairstyle sample on the head of the person to be reused.
As a further improvement of the present invention, in the step a3, the generated three-dimensional model of the hair style may be rendered, and an effect graph may be generated and/or a hair style library may be established.
As a further improvement of the invention, the hairstyle three-dimensional model obtained after the correction can be used for intelligent multiplexing and trimming of hairstyles by giving the exact hair length of the corresponding scalp area of the head of the person to be multiplexed with hairstyles.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
(1) the invention relates to a method for three-dimensional modeling and model multiplexing of a human hair style, wherein a virtual center point and an axis point of a human head are determined by selecting a relatively fixed mandible point, a nose bridge point and a back head vertex point on the human head, an electromagnetic field source and a magnetic detector are arranged on corresponding fixed points, a magnetic field is generated on the human head to perform positioning, and state information and position information of a scalp part are determined by arranging a detection probe to scan the scalp part of the human body, so that the position information and the state information on the whole scalp part are combined to obtain a three-dimensional positioning model and a scalp state model of the human head, and the accuracy and the repeatability of the whole scalp position positioning are effectively improved;
(2) the invention relates to a human body hairstyle three-dimensional modeling and model multiplexing method, which selects characteristic main hairlines in different areas on a hairstyle, inputs the characteristic main hairlines into a hairstyle model head three-dimensional positioning model corresponding to the acquisition positions of the characteristic main hairlines, generates the main hairlines and the auxiliary hairlines in a gradual change mode, and finally establishes a three-dimensional model of the hairstyle by combining the hairstyle model head three-dimensional positioning model, wherein the hairstyle model is easy and convenient to establish, and once the hairstyle model is established, the hairstyle model can be repeatedly used for multiple times, so that the cost is lower;
(3) according to the method for three-dimensional modeling and model multiplexing of the human hair style, the scalp state model of the person who needs to trim the hair style is collected, and the hair style three-dimensional model suitable for the person who needs to trim the hair style can be finally generated through comparison of hair state differences in the scalp state model of the person who needs to trim the hair style and the scalp state model of the hair style model, so that the reproduction of the hair style on the head of the person who needs to trim the hair style can be finished according to the hair style three-dimensional model, the reproduction of the hair style is fully met, the reproduction of the hair style is combined with the scalp states and hair information of all areas of the head of a human body, the reality of hair style multiplexing is greatly improved, and the accuracy and the applicability of hair style multiplexing are higher;
(4) the method for three-dimensional modeling and model multiplexing of the human body hairstyle has the advantages that the establishment and multiplexing of the hairstyle model are simple, the operation is simple and convenient, once the hairstyle model and the three-dimensional positioning model of the human head are established, the hairstyle model and the three-dimensional positioning model of the human head can be repeatedly used for many times, the reality of hairstyle multiplexing is greatly improved, meanwhile, the design cost of the hairstyle is reduced, and the method has great application and popularization values.
Drawings
FIG. 1 is a side view of an auxiliary device for three-dimensional modeling of a human hair style according to an embodiment of the present invention;
FIG. 2 is a front view of an auxiliary device for three-dimensional modeling of a human hair style according to an embodiment of the present invention;
FIG. 3 is a top view of an auxiliary device for three-dimensional modeling of a human hair style according to an embodiment of the present invention;
FIG. 4 is a structural diagram of a detection pen for three-dimensional modeling of a human hair style according to an embodiment of the invention;
FIG. 5 is a schematic diagram of the overall structure of an auxiliary device for three-dimensional modeling of a human hair style according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a multi-person collaboration for three-dimensional modeling of a human hair style in an embodiment of the invention;
in all the figures, the same reference numerals denote the same features, in particular: 1. the human body head part comprises a human body head part, 2. a mandible point, 3. a nose bridge point, 4. a forehead point, 5. a face point, 6. a lateral brain point, 7. a posterior brain point, 8. a face support, 9. a face fixing knob, 10. a fixing pressing sheet, 11. a forehead point support, 12. a mandible point support, 13. a posterior brain point support, 14. a lower mandible point electromagnetic field source, 15. a nose bridge point magnetic detector, 16. a forehead point magnetic detector, 17. a face point magnetic detector, 18. a lateral brain point magnetic detector, 19. a posterior brain point magnetic detector, 20. a detection pen, 21. a detection pen head electromagnetic field source, 22. a hair taking hook, 23. a hair guide wire, 24. a sensor, 25. a hair guide hose, 26. a working top seat, 27. a servo motor and 28. a detection pen hanging rope.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Although the hairstyle of the human head can be changed in a great number, the hairstyle is not separated from the human head because each hair in the hairstyle has a hair root with a determined position and does not appear through empty hair. Each hair strand may be drawn from a defined position on the hairstyling surface, along a contoured curve, to a defined position on the scalp at the root of the hair. Adjacent hairs also do not appear disorderly, often regularly oriented in the same direction, and the curves of adjacent hairs tend to have the same or similar morphology. All hairstyles are formed by arranging and combining tens of millions of hairlines, the arrangement of the hairlines is quite regular, the three-dimensional curve form of human body hairlines is not quite complex, and the three-dimensional curve form of most hairstyles and hairlines is quite simple or the three-dimensional curve form of most hairlines is quite simple. Various hairstyles have a plurality of characteristic hairlines which can show the hairstyle shape, and the hairline shape between two characteristic hairlines is in gradual change relationship.
Based on the principle rules of several points formed by the human head hairstyle, the invention establishes a three-dimensional model of the human body hairstyle, collects the state information of scalp parts of various areas, such as parameters of hair length, diameter, elasticity, color, hair follicle quantity or hair distribution condition, and provides a basis for hairstyle multiplexing or intelligent hairstyle trimming.
In the preferred embodiment of the invention, a three-dimensional model of the hairstyle is established through a hairstyle model, and the method comprises the following steps:
s1: three-dimensional positioning of full scalp region and three-dimensional modeling of scalp state of human head with sample hairstyle trimming
The human skull can be divided into a skull and a face skull, wherein the side surface of the skull is generally irregular and round, the top surface is oval and the face skull is slightly conical. Aiming at irregular circles on one side of the skull, the three-dimensional positioning method for the scalp of the human body in the preferred embodiment of the invention can determine a unique axial center point which is relatively positioned at the central position and has simple, convenient, universal and good repeatability in positioning operation; then, a data acquisition device is arranged, a connecting line of axle center points on two sides of a skull is taken as a rotating shaft, a guide rail is arranged to rotate around the rotating shaft, a movable detection probe is arranged in the guide rail to scan, detect and position all scalp parts, various head position information and state data are acquired, position information of each measuring point is acquired through arranging devices such as an electromagnetic field source and a magnetic detector, and three-dimensional positioning of all scalp parts of a human body is achieved.
The three-dimensional positioning method for the scalp part of the human body in the preferred embodiment comprises the following steps:
firstly, determining a virtual central point in a brain cranium and axial center points at two sides of the brain cranium; firstly, determining a median sagittal plane of a human head 1, namely a vertical plane passing through a virtual central point of the human head and enabling two sides of the head to be approximately symmetrical, and selecting a mandible point 2, a posterior head vertex, a nose bridge point 3 and a brain posterior neck point, wherein the mandible point 2 in the preferred embodiment is the lowest point of the mandible lower edge, namely a point of intersection of the mandible lower edge and the head, and the posterior head vertex point are preferably points on the median sagittal plane of the human head and farthest from the mandible point 2, and the nose bridge point is the most concave point of a human nose bone on the median sagittal plane of the head; then, the mandible point 2 and the back head vertex are connected into a line, the line passes through a virtual circle center point, a ray is led out from the nose bridge point 3 to intersect with the line, when the distance between the nose bridge point 3 and the intersection point is equal to the distance between the back head vertex and the intersection point, the intersection point is the virtual circle center point in the encephalic of the head 1 of the human body, and the axis center point is the point which is perpendicular to the two sides of the encephalic from the virtual circle center point and the positive sagittal plane of the head, so that the virtual circle center point and the axis center point can be determined.
Secondly, three-dimensional positioning of the scalp part of the human head 1; after the virtual center point and the axis point are determined, establishing corresponding position coordinates to realize the three-dimensional positioning of the scalp part on the basis of the virtual center point and the axis point;
in the preferred embodiment, the magnetic field is adopted to carry out three-dimensional positioning on the scalp, the penetrability of the magnetic field to non-magnetic shielding objects (such as a human body) is utilized to realize the three-dimensional positioning of the corresponding parts of the human body, and compared with an X-ray perspective positioning method, an ultrasonic positioning method and a radioactive element marking positioning method, the method has the characteristics of high precision, no injury, no damage, ionizing radiation avoidance, simplicity and convenience in operation and the like. Arranging one or a plurality of magnetic field sources on a plurality of fixed measuring points of the head 21 of the human body to form a magnetic field on the head of the human body, wherein the magnetic field sources in the preferred embodiment are electromagnetic field sources, and can also be permanent magnets and other devices capable of generating the magnetic field, then arranging a detection probe containing a magnetic detector or the magnetic field sources, scanning and detecting the whole scalp position of the head 1 of the human body by the detection probe, and calculating the accurate position of the detection probe according to data information fed back by the magnetic detector of the detection probe, thereby realizing the three-dimensional positioning of the corresponding scalp position of the head of the human body; further preferably, the detection probe can be arranged on a circular arc-shaped guide rail, two ends of the guide rail are respectively arranged on two axial center points and can rotate around an axial center point connecting line, so that the scanning range of the detection probe can cover the whole scalp part, the detection probe in the preferred embodiment can move in the guide rail in a reciprocating manner, and then the whole scalp part of the human head 1 can be positioned and the scalp state can be acquired through the line-by-line scanning of the detection probe.
Further, the scalp state information detected by the detection probe comprises the position, the number, the density, the health state and the growth angle of the hair follicles in the scalp region where the scalp region is located, and information and data corresponding to the distribution, the growth direction, the number, the density, the diameter, the color, the health state, the subcutaneous telangiectasia and the like of the hairs in the hair follicles; because the scalp of the human head 1 is attached with hair and the influence of the hair is avoided, the detection probe is inserted into the hair and directly reaches the scalp to acquire the image, data and three-dimensional shape of the scalp, so the detection probe which can be inserted into the hair and directly reaches the scalp to operate at the scalp fully attached with the hair is arranged and is used for scanning at the full scalp, thereby completing the state detection of each position point of the full scalp of the human body, and acquiring the hair information and hair follicle information of each position of the scalp, such as the position, the number, the density and the health state of hair follicles of a scalp area, and the distribution condition, the growth direction, the number, the density, the diameter, the color and the health state of the hair in the corresponding hair follicles.
Furthermore, the position information acquired by the detection probe corresponds to the scalp state information of the position one by one, and the position points are connected in sequence, so that the state information of the corresponding position of the human scalp part corresponds to the position information, and then the corresponding information is processed and modeled, so that the three-dimensional modeling of the state information of each scalp part of the human head 1 can be realized, and the real-time monitoring of the state information of any scalp part can be realized.
S2: collecting relevant information of sample hair style
In the preferred embodiment, a three-dimensional model of the hairstyle is created by the operator in an intuitive interactive manner based on the three-dimensional positioning model determined in step S1 through the collection and recording of hair style characteristics. The specific method employed in the preferred embodiment is as follows:
firstly, finding out characteristic main hairlines, finding out characteristic hairlines which can show the shape of a hairstyle most according to the shape characteristics of the hairstyle, and selecting one or a plurality of adjacent hairlines as the characteristic main hairlines;
for a hair style, the characteristics of the hair style in each area of the human head are different, and the characteristics can be embodied on the morphological characteristics such as the length, the angle, the bending degree and the like of the hair, so that theoretically, each hair is taken as a characteristic main hair to collect corresponding morphological data, and the characteristics of the hair style can be most embodied, but the method can increase the data collection workload undoubtedly, and generally, the shape and the data parameters of the hair in adjacent areas of the same hair style are similar or continuously changed, so that the characteristic main hair can be selected according to a certain number of characteristic areas on the hair style, so that the morphological parameters of the relevant positions of the hair style can be collected, and the selection precision of the characteristic main hair cannot greatly influence the precision of the hair style modeling.
Secondly, an operator grabs the characteristic main hair by using a corresponding device, collects and measures data such as the position, the length, the elasticity, the color and the like of the tip and the root of the characteristic main hair, and simultaneously draws the three-dimensional curve form of the characteristic main hair at a specific position according to the collected state parameters on the basis of the head three-dimensional positioning model of the real person hairstyle model established in the step S1 as one characteristic main hair in the hairstyle three-dimensional model;
thirdly, the steps are repeated to draw a plurality of characteristic main hairlines in the head three-dimensional positioning model;
finally, a plurality of main hairlines are generated between every two adjacent characteristic main hairlines according to the shape gradual change relation between the characteristic main hairlines, the main hairlines are the hairlines which are close to the characteristic main hairlines and have small shape difference, the hairlines within a certain distance around the characteristic main hairlines are usually selected, the shape difference of the main hairlines positioned at the side of the same characteristic main hairline is small, particularly when the positions between the two adjacent characteristic main hairlines are close, the characteristic parameter difference is smaller, such as the length and the growth angle difference are not large, and the hairlines between the two main hairlines often exist in a continuously gradual change mode, so that the two adjacent main hairlines are arranged at the position of a hair root on a certain hair follicle between the two adjacent characteristic main hairlines of the three-dimensional positioning model of the real human hair model.
Furthermore, it is preferable that information and data such as hair distribution, growth direction, number, diameter, color and luster of each part of the scalp of the hairstyle model and various generation parameters (including some probability functions such as hair tip deviation radius, hair length change and the like) are adjusted by an operator to generate a plurality of secondary hair lines around each primary hair line, wherein the secondary hair lines are hair lines which surround the primary hair lines and are closer to the primary hair lines, and the form of the secondary hair lines can be obtained in a gradual change mode according to the close primary hair lines, so that the hairstyle of the hairstyle model is established in a three-dimensional head model, and a three-dimensional hairstyle model corresponding to the hairstyle is formed; the generation of the primary and secondary hair is well applied in the prior art, and as the academic thesis in the prior art "modeling and dynamic simulation algorithm research for realistic three-dimensional hair" introduces this detailed description, the present solution can also use the related technology in the above thesis to realize the generation of the primary and secondary hair, and this process is not the focus of the present solution, so no further description is made here.
Further preferably, in a preferred embodiment, the collection of the characteristic main hair information is performed by providing a detection pen, the detection pen is preferably hollow, a hair taking hook capable of stretching and retracting in the detection pen is provided at the front end of the detection pen, and a sensor capable of detecting hair state information is provided in the detection pen, so that the position information of the tip and the root of the characteristic main hair, the length, the elasticity, the softness, the friction force of the hair and the color information of each section of the hair are detected by the sensor after one or more hair hooks are taken out and pulled into the detection pen.
Further, in the preferred embodiment, the finally generated three-dimensional model of the hairstyle can be rendered, so as to obtain a three-dimensional hair model which is almost consistent with the hairstyle on the head of the hairstyle model.
Further, after the hair style three-dimensional model is built through the steps, the hair style three-dimensional model can be uploaded to a computer system or a cloud end and used for selecting and reusing the hair style, people who need hair style design can select favorite hair style from the computer system or the cloud end, a state diagram of the hair style can be generated by combining the head three-dimensional model and scalp state information of the people, then the hair style can be trimmed on the head of the people according to the state diagram, the hair style can be reused, and the hair style three-dimensional model in the preferred embodiment can be preferably reused on the heads of the same individual or different individuals.
Furthermore, the hairstyle of the human head is usually determined by the length of the hair, the growth angle of the hair follicle and the curvature of the hair, and generally speaking, when the same hairstyle is reused on the head of the same person, the distances from the tips of the hair in different areas to the scalp are mostly fixed or have small differences, so that the original hairstyle does not need to be greatly corrected unless the scalp state parameters of the scalp part of the human head are greatly changed, such as external force influence or disease influence; further, when the same hairstyle is used in different individuals, the hairstyle cannot be directly reused due to the difference in the shape and size, the hair density and the hair follicle growth angle between human heads and the difference in the distribution, the hair color, the hair diameter, the softness and the elasticity of the hair, and the hairstyle needs to be reused after being adjusted according to the difference in the scalp state information between the person who wants to cut the hairstyle and the hairstyle model.
Further specifically, the scaling of the hairstyle model can be proportionally realized according to the information such as the size, the shape and the like of the head collected and measured by a person who wants to trim the hairstyle; according to the information such as the specific position of the head hairline and the like acquired and measured by a person who wants to trim the hairstyle, the multiplexing hairstyle model can be attached to the three-dimensional head model of the person who wants to trim the hairstyle more accurately and more closely; according to the information such as the distribution condition, the density, the quantity and the like of the hair collected and measured by a person who wants to trim the hair style, the quantity of the hair of the reusable hair style model can be increased or reduced according to the actual condition; according to the information such as the growth direction of the hair collected and measured by the person who wants to trim the hairstyle, the change of the relevant form of the multiplexing hairstyle model can be calculated; according to the information such as the diameter of the hair collected and measured by a person who wants to trim the hair style, the thickness of the whole bundle of hair (such as the thickness of a hair braid) or the change of the thickness of the head hair style can be calculated; according to the measured information of softness, elasticity and the like of the hair collected by a person who wants to trim the hair style, the change of the three-dimensional curve form of the characteristic main hair can be calculated; and according to the information of the color, the luster and the like of the hair collected and measured by a person who wants to trim the hair style, different hair style color effects after rendering are realized, and the like.
Further, the reuse of the hairstyle in the preferred embodiment preferably employs the following method:
firstly, the three-dimensional modeling of the head and the modeling of the scalp state of a person to be trimmed are realized through the step S1, and the collection of the head state information is completed;
secondly, comparing the head state information of the hairstyle model with the head state information of a person to be hairstyle trimmed to generate corresponding correction parameters, wherein the selection of the correction parameters is mainly determined by the difference of the shape and the size of human heads, the hair density, the hair sac position and the growth angle, and the distribution condition, the hair color, the hair diameter, the softness and the elasticity of the hair;
thirdly, introducing the correction parameters into the original hairstyle three-dimensional model, and correspondingly adjusting partial parameters of corresponding positions in the hairstyle three-dimensional model according to the correction of the correction parameters, such as adjustment of the length of hair in partial areas or fine adjustment of hairstyle shapes, so as to generate the hairstyle three-dimensional model when the hairstyle is reused on the head of a person to trim the hairstyle;
and finally, according to the hairstyle three-dimensional model in the steps, the hairstyle can be reproduced on the head of the human body in a manual trimming or intelligent trimming mode, and the reuse of the hairstyle three-dimensional model is completed.
The reusable generated hairstyle three-dimensional model combines the head shape characteristics, scalp state information and hair information of the hairstyle person to be trimmed, is closer to the actual situation, and enables the hairstyle person to be trimmed to visually see the hairstyle effect after trimming before trimming, so that the experience effect is improved, the generated hairstyle three-dimensional model can be rendered, an effect graph can be generated and/or a hairstyle library can be established, and the convenience and the authenticity of application are further improved.
Further, in order to assist in completing the three-dimensional modeling of the hair style, in a preferred embodiment, an auxiliary device is used to collect information related to the hair style of the hair style model, as shown in fig. 1 to 6, wherein fig. 1 is a structural side view of the auxiliary device for three-dimensional modeling of the human body hair style in the embodiment of the present invention; FIG. 2 is a front view of an auxiliary device for three-dimensional modeling of a human hair style according to an embodiment of the present invention; FIG. 3 is a top view of an auxiliary device for three-dimensional modeling of a human hair style according to an embodiment of the present invention; FIG. 4 is a structural diagram of a detection pen for three-dimensional modeling of a human hair style according to an embodiment of the invention; FIG. 5 is a schematic diagram of the overall structure of an auxiliary device for three-dimensional modeling of a human hair style according to an embodiment of the present invention; fig. 6 is a schematic diagram of multi-person collaboration for three-dimensional modeling of a human hair style in an embodiment of the invention.
More specifically, the aid in the preferred embodiment preferably provides 9 stations on the human head 1: a mandible point 2, a nose bridge point 3, a forehead measuring point 4, two face measuring points 5, two lateral brain measuring points 6 and two posterior brain measuring points 7. The lower mandible point 2 is preferably the lowest point of the lower mandible edge, namely the point of the lower mandible edge which is intersected with the median sagittal plane of the head, an electromagnetic field source is preferably arranged on the lower mandible point 2, magnetic detectors are arranged on other measuring points, and the lower mandible point 2, the nose bridge point 3 and the frontal measuring point 4 are preferably positioned on the median sagittal plane of the head of the hairstyle model.
Furthermore, a face support 8 is provided to support each magnetic detector, which can be worn on the face of the human body and fixed correspondingly, in the preferred embodiment, a nose bridge point magnetic detector 15 is arranged at the upper part of the front end of the face support 8 corresponding to the nose bridge point 3 and is arranged at the lowest part of the nose bridge bone of the hairstyle model, a forehead measuring point support 11 on the face support 8 has certain elasticity and extends upwards to the forehead, and the upper end of the face support is provided with a forehead measuring point magnetic detector 22 attached to the forehead of the real human hairstyle model; further, the face support 8 of the preferred embodiment is preferably fixed on the head of the human body by a face fixing knob 9 on each side, and is preferably provided with a face measuring point magnetic detector 23 on the lower portion thereof, and the magnetic detector can be fixed on the head of the hairstyle model after the knob is tightened, and preferably is provided with a fixing pressing piece 10 between the head and the magnetic detector, namely, the fixing pressing piece 10 on the lower portion thereof is pressed on the cheekbones on each side of the hairstyle model by the face fixing knob 9, so that the face support 8 is fixed on the head of the hairstyle model.
Furthermore, two supports 13 for measuring points behind the brain are respectively arranged at two sides of the head 1 of the human body, preferably two supports which are symmetrically arranged, are symmetrical with the median sagittal plane of the head 1 of the human body and are used for installing a magnetic detector 18 for measuring points at the side of the brain and a magnetic detector 19 for measuring points behind the brain; furthermore, in the preferred embodiment, the back brain measurement point support 13 is arc-shaped and can surround the head of the human body to adapt to the shape of the head 1 of the human body, in the preferred embodiment, one end of the back brain measurement point support 13 positioned at two sides of the head of the human body can be fixed at the rear end of the face support 8 through two face fixing knobs 9, and the other end of the back brain measurement point support 13 extends to the rear end of the head 1 of the human body along the curve of the head of the human body; further, a brain side measuring point magnetic detector 18 is arranged in the middle of the brain rear measuring point bracket to complete the detection of the brain side position, and a brain rear measuring point magnetic detector 19 is arranged at the tail end of the brain rear measuring point magnetic detector, which is far away from the face fixing knob 9, to complete the determination of the brain rear position.
Further, it is preferable that a mandibular point support 12 is placed on the chin of the hairstyle model by two elastic bands at the lower end of the face support 8, a mandibular point electromagnetic field source 14 is provided in the support 12, an electromagnetic field is generated by the mandibular point electromagnetic field source 14, and magnetic field information is collected by other magnetic detectors and transmitted to a computer system, and then the computer system calculates the three-dimensional positional relationship of the measuring points of the head of the hairstyle model based on the collected magnetic field data, and matches the three-dimensional head model to the three-dimensional head model of the hairstyle model, and then displays the three-dimensional head model on a display screen. Further preferably, to improve the accuracy of magnetic field data acquisition, more magnetic detectors may be disposed on the face support 8, or other magnetic fields and magnetic detector arrangements may be used, and are not limited to the above arrangement.
Furthermore, a detection pen 20 is arranged to complete the collection of the hair style characteristics of each position of the hair style model, the front part of the detection pen 20 in the preferred embodiment is provided with a detection pen point electromagnetic field source 21 which emits an electromagnetic field in a time-sharing manner with the electromagnetic field source 14 at the lower mandible point, and after the collection by each magnetic detector, the computer system can calculate the three-dimensional position and direction of the front part of the detection pen 20 in the three-dimensional head model of the hair style model in real time and simultaneously display the three-dimensional position and direction on a screen, so that the subsequent drawing operation of the three-dimensional curve shape of the characteristic main hair line by an operator is facilitated; further, the front end of the test pen 20 in the preferred embodiment is further provided with a hair-catching hook 22 for catching hair at a certain position of the hairstyle, however, the form of catching is not limited to the above-mentioned manner, and other manners such as a hair-sucking tube with negative pressure may be used to catch one or several adjacent hair strands, and only one of them may be caught as far as possible.
Further, the sensing pen 20 in the preferred embodiment is provided with a sensor in the middle and a hair-guiding hose 25 connected to the rear end, as shown in fig. 4. The detection pen 20 and the hair guiding hose 25 are both hollow, a hair guiding wire 23 is arranged in the detection pen 20 and connected with the hair taking hook 22, and the hair taking process of the hair taking hook 22 can be achieved through the movement of the hair guiding wire 23 in the detection pen 20. The method comprises the following steps of grabbing one or a plurality of adjacent hairlines by using a hair-fetching hook 22, grabbing only one of the hairlines as far as possible, collecting the three-dimensional position of the hairline tip by an operator, grabbing the hairline tip by using hands, slowly and slightly pulling the hairline tip, keeping the adjacent hairlines from being disturbed as far as possible, carefully observing the three-dimensional curve form of the hairline during pulling the hairline tip, recording and describing the form of the hairline on a three-dimensional head model in a system through an external input device of a computer system, and preferably, the operator needs to have certain hand-drawing power to ensure that the drawn hairline form is not distorted as far as possible; then, after the hair is straightened, the hair root of the hair is pulled, and the operator inserts the front part of the detection pen 20 into the hair to reach the position of the hair root of the hair, so as to acquire the three-dimensional position of the hair root; further, under the control of the operator, the hair-taking hook 22 at the front end of the detection pen 20 hooks the root of the hair, and preferably, if the hair-taking hook 22 does not hook the hair in the hair, but hooks other adjacent hairs, the result of hair information collection is not obviously affected.
Furthermore, after the hair is hooked by the hair taking hook 22, the hair taking hook can be driven by the hair guiding wire 23 at the rear end of the hair taking hook to retract backwards in the detection pen 20, the hair guiding wire 23 is driven to extend and retract by the servo motor 27 arranged in the working top seat 26, the hair guiding wire 23 is preferably made of a material which can be bent freely but does not deform elastically, the rear end of the detection pen 20 is communicated with the hair guiding hose 25, the hair taking hook 22 can hook the hair and retract into the hair guiding hose 25 until the length of the hair is exceeded, the hair is separated from the hair taking hook 22, and in the retracting process, data such as color, elasticity, softness, friction force, length and the like of each part of the hair are acquired through the sensor 24 arranged at the rear part of the detection pen 20. Further, after the hair is separated from the hair-taking hook 22, the operator takes the test pen 20 away from the head of the model to pull out the hair, and the hair-taking hook 22 is driven by the hair-guiding wire 23 driven by the servo motor 27 in the working top seat 26 to extend forward and return to the front end of the test pen 20, so as to continue the next hair-taking operation.
Once the detection pen 20 finishes collecting information of the hair style hairline, the operator can draw the three-dimensional curve of the hairline as a characteristic main hairline of the hairstyle according to the specific positions of the hair tip and the hair root of the hairline and the specific three-dimensional curve form of the hairline, and the characteristic main hairline is arranged at the position of the hair root of a certain hair follicle of the three-dimensional head model of the hairstyle model, so that more characteristic main hairlines are recorded, and finally the whole hairstyle three-dimensional model is built.
Further preferably, the arrangement of the mechanisms of the detection pen 20 and the working top seat 26 and the sensor 24 is not limited to the above-described form, and those skilled in the art can implement the detection in other forms according to the actual needs, and the working top seat 26 is not limited to only being provided with the servo motor 27, but also can be provided with other motors, such as a stepping motor, etc., and can also be provided with hydraulic drive, pneumatic drive, etc.; further preferably, as shown in fig. 6, which is a schematic diagram of multi-person cooperation of three-dimensional modeling of a human hair style in an embodiment of the present invention, more than one detection pen 20 is used to complete information acquisition of hair style characteristic main hair in a multi-person cooperation manner, so that the acquisition efficiency can be greatly improved.
The method comprises the steps of collecting a plurality of characteristic main hair strands, generating a plurality of main hair strands and a plurality of auxiliary hair strands between any two characteristic main hair strands on the basis of the characteristic main hair strands, generating a plurality of strands of hair, forming the whole hairstyle, and rendering the hairstyle model according to information and data such as color, luster and the like of each part of the characteristic main hair strands, so that an effect picture consistent with the hairstyle on the hairstyle model head is obtained, the collection of the hairstyle model is realized, and the establishment of the three-dimensional hairstyle model is completed.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A method for three-dimensional modeling of a human hair style, which is used for three-dimensional modeling of a sample hair style on a human head with the sample hair style trimmed, comprises the following steps:
s1: selecting a lower mandible point (2) positioned at the lowest part of the lower mandible, a nose bridge point (3) positioned at the most concave part of a nose bone and a point farthest from the lower mandible point (2), namely a back head top point, from the outer edge of a median sagittal plane of the head (1) of the human body, determining virtual central points in the head (1) of the human body according to the distance relationship among the three points, and determining two axial central points which are respectively arranged at two sides of the head (1) of the human body and have connecting lines vertical to the median sagittal plane and pass through the virtual central points by using the virtual central points;
s2: arranging at least one magnetic field source and a plurality of magnetic detectors on the outer edge of the median sagittal plane of the human head (1) and two axial center points, wherein the magnetic field source generates a magnetic field on the human head (1) and the magnetic detectors determine the relative position in the magnetic field;
s3: arranging a detection probe capable of carrying out mobile positioning and detection at any position of the whole scalp part of the human head (1), wherein the detection probe is provided with a magnetic detector or a magnetic field source, the position information and scalp state information of the scalp part where the detection probe is positioned are fed back by the movement and detection of the detection probe at the whole scalp part of the human head (1), a three-dimensional positioning model of the human head (1) is established according to the acquired position information, and a scalp state three-dimensional model is established according to the three-dimensional positioning model and the scalp state information;
s4: selecting characteristic main hairlines in each characteristic area of the sample hairstyle, collecting position parameters and characteristic information parameters of the characteristic main hairlines and correspondingly inputting the position parameters and the characteristic information parameters into the three-dimensional positioning model of the human head (1);
s5: a plurality of main hairs and auxiliary hairs are generated among the characteristic main hairs in the three-dimensional positioning model of the human head (1), thereby forming a three-dimensional model of the hairstyle.
2. The method for three-dimensional modeling of human hair style according to claim 1, wherein the scalp state information includes location, number, density and health status of hair follicles of a scalp area where the detection probe is located, and distribution, growth direction, number, density, diameter, color and health status of hairs in the corresponding hair follicles.
3. The method for three-dimensional modeling of human hair style according to claim 1, wherein the collection of the characteristic main hair information can be achieved by arranging a detection pen (20), the detection pen (20) is hollow inside, the front end of the detection pen is provided with a hair taking hook or a hair taking small claw which can be extended and retracted in the detection pen (20) so as to take or grab one or more hair and pull the hair into the detection pen (20), and the sensors arranged on the detection pen (20) are used for detecting the position information of the hair tip and the hair root of the characteristic main hair, the length, the elasticity, the softness, the friction force and the color information of each section of the hair.
4. A method of three-dimensional modelling of a human hairstyle as claimed in any one of claims 1 to 3 wherein the virtual centre point is determined by:
connecting the mandible point (2) and the vertex of the back head into a straight line, leading a ray from the nose bridge point (3) to intersect with the straight line, moving the position of the intersection point until the distance between the intersection point and the vertex of the nose bridge point (3) and the distance between the intersection point and the vertex of the back head are equal, and the intersection point is the virtual central point in the brain of the head (1) of the human body.
5. Method for three-dimensional modeling of a human hair style according to any of claims 1-3, wherein said magnetic field source is placed on said inframandibular point (2) and magnetic detectors are placed on said nose bridge point (3), said posterior vertex and both said axial center points, respectively.
6. The method for three-dimensional modeling of human hair style according to any one of claims 1 to 3, wherein the detection probe is disposed on a circular arc-shaped guide rail, two ends of the guide rail are respectively disposed on two axial center points and can rotate around a connecting line of the axial center points to realize the covering of the whole scalp position, and the detection probe can move back and forth in the guide rail, so that the positioning of the whole scalp position of the human head (1) and the collection of the scalp state can be realized through the back and forth movement of the detection probe and the rotation of the guide rail.
7. A method for reusing the three-dimensional model of human hair style, which is realized by using the three-dimensional model of human hair style generated by the method for three-dimensional modeling of human hair style according to any one of claims 1 to 6, and comprises the following steps:
a1: establishing a three-dimensional head positioning model and a scalp state model of a person to be reused, and completing positioning at the whole scalp part of the head and collecting scalp state information;
a2: comparing parameters of the scalp state three-dimensional model of the human head (1) with the scalp state three-dimensional model of the head of the person to be subjected to hair style reusing, and generating corresponding correction parameters, wherein the correction parameters are determined according to the difference between the shape and the size, the hair density, the hair follicle position and the growth angle of the head of the person to be subjected to hair style reusing and the human head (1) of the sample hair style, and the distribution condition, the hair color, the hair diameter, the softness and the elasticity of the hair;
a3: and substituting the correction parameters into the human body hairstyle three-dimensional model for adjustment and correction to generate a hairstyle three-dimensional model matched with the head of the person to be reused, obtaining the hair length information of the scalp area corresponding to the head of the person to be reused after correction, and further realizing the reuse of the hairstyle sample on the head of the person to be reused.
8. The method for reusing the three-dimensional model of human hair style according to claim 7, wherein the step a3 further renders the generated three-dimensional model of hair style, and generates an effect diagram and/or builds a hair style library.
9. The method for reusing a three-dimensional model of human hair style according to claim 7 or 8, wherein the three-dimensional model of hair style obtained after modification can be used for intelligent reuse trimming of hair style by giving the exact hair length of the corresponding scalp area of the head of the person to be reused with hair style.
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| CN113761974B (en) * | 2020-06-03 | 2024-04-26 | 富泰华工业（深圳）有限公司 | Scalp monitoring method, intelligent hair dryer and storage medium |
| CN116129151B (en) * | 2023-02-23 | 2023-08-11 | 北京云数智康医疗科技有限公司 | User feature-based AI hairstyle matching fitting method and system |
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| CN101344373A (en) * | 2008-08-14 | 2009-01-14 | 中国人民解放军总后勤部军需装备研究所 | Standardization processing method based on three-dimensional head and face curved surface modeling |
| CN103035030B (en) * | 2012-12-10 | 2015-06-17 | 西北大学 | Hair model modeling method |
| CN103606186B (en) * | 2013-02-02 | 2016-03-30 | 浙江大学 | The virtual hair style modeling method of a kind of image and video |
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| US9579046B2 (en) * | 2015-07-24 | 2017-02-28 | Albert Davydov | Method and apparatus for unambiguously determining orientation of a human head in 3D geometric modeling |
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