WO2024037082A1 - 眼镜建模方法及眼镜 - Google Patents

眼镜建模方法及眼镜 Download PDF

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Publication number
WO2024037082A1
WO2024037082A1 PCT/CN2023/095298 CN2023095298W WO2024037082A1 WO 2024037082 A1 WO2024037082 A1 WO 2024037082A1 CN 2023095298 W CN2023095298 W CN 2023095298W WO 2024037082 A1 WO2024037082 A1 WO 2024037082A1
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WO
WIPO (PCT)
Prior art keywords
glasses
stipule
points
parameters
model
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PCT/CN2023/095298
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English (en)
French (fr)
Inventor
吴俊中
刘宗表
卿霞
Original Assignee
珠海赛纳视博科技有限公司
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Publication of WO2024037082A1 publication Critical patent/WO2024037082A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C13/00—Assembling; Repairing; Cleaning
    • G02C13/003—Measuring during assembly or fitting of spectacles
    • G02C13/005—Measuring geometric parameters required to locate ophtalmic lenses in spectacles frames
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C5/00—Constructions of non-optical parts
    • G02C5/12—Nose pads; Nose-engaging surfaces of bridges or rims
    • G02C5/122—Nose pads; Nose-engaging surfaces of bridges or rims with adjustable means
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C5/00—Constructions of non-optical parts
    • G02C5/12—Nose pads; Nose-engaging surfaces of bridges or rims
    • G02C5/122—Nose pads; Nose-engaging surfaces of bridges or rims with adjustable means
    • G02C5/124—Nose pads; Nose-engaging surfaces of bridges or rims with adjustable means for vertically varying the position of the lenses
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2111/00—Details relating to CAD techniques
    • G06F2111/16—Customisation or personalisation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2113/00—Details relating to the application field
    • G06F2113/10—Additive manufacturing, e.g. 3D printing

Definitions

  • This application relates to the technical field of three-dimensional printing glasses, and in particular to glasses modeling methods and glasses.
  • glasses have become very popular, and more and more people need glasses to maintain their daily work and life.
  • a new type of customized glasses has begun to appear, that is, customized glasses for individual customers based on their preferences, facial features and other personalized characteristics. , private glasses design and glasses customization.
  • Glasses include frames and nose pads.
  • the nose pads are an important part of glasses. They are the supporting components of the frame on the bridge of the nose. In personalized design, in order to maintain the comfort of the wearer, the position of the nose pads affects the wearer. Comfort when wearing custom glasses. Currently, during the glasses modeling process, it is difficult to adjust the matching of the nose pads to the wearer's nose.
  • Embodiments of the present application provide a glasses modeling method and glasses, which can improve the matching degree between the nose pads and the wearer's nose, and improve the comfort of using glasses.
  • An embodiment of the present application provides a glasses modeling method, which method includes:
  • the stipule model includes a stipule body and a twisted arm, the twisted arm connects the stipule body and the glasses frame model;
  • the model parameters of the twist arm are adjusted to obtain a glasses model, and the model parameters of the twist arm include size parameters and/or twist angles.
  • adjusting the model parameters of the twist arm based on the glasses frame model and at least part of the three-dimensional facial feature data includes:
  • Adjust the size parameters of the twisted arm to adjust the distance between the stipule body and the spectacle frame model;
  • the twisting angle of the twisting arm is adjusted, and the twisting angle includes at least one of a bevel angle, a rake angle, and a side angle.
  • the glasses model further includes a stipule, and the stipule is connected to the stipule stem body.
  • the glasses parameters include at least one of frame parameters, stipule parameters, and temple parameters.
  • the plurality of feature points include facial contour points, eyebrow arch points, eyebrow starting points, eyebrow ending points, inner canthus points, outer canthus points, pupil points, temple points, cheekbone points, cheek points, and nose points. At least one characteristic point among the root point, the nose tip point, the left and right nasal side points, the left and right mouth corner points, the chin bottom point, the ear base point and the auricle point.
  • the glasses parameters include frame parameters, and generating a glasses frame model based on the glasses parameters and at least part of the three-dimensional facial feature data includes:
  • the standard glasses frame model is adjusted according to at least part of the three-dimensional facial feature data to obtain a glasses frame model that matches the wearer; wherein at least part of the three-dimensional facial feature data includes eyebrow arch points, inner canthus points, Position data of at least one feature point among the outer canthus point, pupil point, temple point, cheekbone point, left and right nasal side points, ear base point and auricle point.
  • the glasses parameters include temple parameters
  • the method further includes:
  • a temple model according to the temple parameters of the glasses parameters and at least part of the three-dimensional facial feature data; wherein at least part of the three-dimensional facial feature data includes at least one of a temple point, an ear base point, and an auricle point.
  • Location data of feature points is generated according to the temple parameters of the glasses parameters and at least part of the three-dimensional facial feature data; wherein at least part of the three-dimensional facial feature data includes at least one of a temple point, an ear base point, and an auricle point.
  • the at least part of the three-dimensional facial feature data includes the root of the nose.
  • obtaining three-dimensional facial feature data of the wearer's head includes:
  • the position data of multiple three-dimensional facial feature points on the wearer's head is obtained through a three-dimensional scanning measurement method.
  • the application provides glasses.
  • the glasses include a spectacle frame and a nose pad.
  • the nose pad includes a stipule stem
  • the stipule stem includes a stipule stem body and a twisted arm. Both sides of the twisted arm
  • the ends are respectively connected to the glasses frame and the stipule body, and the twisting arms have adjustable twisting angles and sizes for adjusting the nose pads.
  • the twist angle includes at least one of a bevel angle, a rake angle, and a side angle.
  • the nose pad further includes a stipule, and the stipule stem is gap-fitted with the stipule.
  • an end of the stipule stem body away from the twisted arm is provided with a stipule button hole, and the stipule is stuck in the stipule button hole.
  • the stipule includes a stub and a blade connected to the stub, the width of the entrance end of the stipule button hole is smaller than the inner width of the stipule button hole, and the stub is stuck It is located in the stipule button hole, and there is a movable gap between the inlet end of the stipule button hole and the side wall of the support pile.
  • an end of the stipule stem body away from the twisted arm is provided with a cutout connected to the stipule buttonhole; the stipule enters the stipule buttonhole through the cutout, and It is stuck in the button hole of the stipe.
  • the stent includes a stub and a blade connected to the stub, and the width of the stub is greater than the width of the cutout.
  • the glasses modeling method provided by this application can adjust the distance between the glasses frame and the stipule body (i.e., the nose pad) by adjusting the model parameters of the twisted arm during the modeling process. It will affect the shape of the entire nose pad; you can also adjust the twist angle of the twist arm to adjust the end of the twist arm connected to the stipule body, which will not affect the shape of the stipule body, let alone the end of the stipule body.
  • the structure of the stipule button hole will not cause the stipule button hole to deform; it ensures the correct assembly angle of the stipule stem and stipule and the fit of the nose pad and the wearer's nose bridge.
  • the matching of the nose pads to the wearer's nose can be improved, and the comfort of using glasses can be improved. It can also improve the modeling efficiency and shorten the design cycle of glasses.
  • the glasses provided by this application can change the size (height and/or shape) and twisting angle of the twisting arm according to the facial features of the wearer, so that the glasses can be more adapted to the user's wearing habits or to adapt to different wearing needs.
  • the size and/or twisting angle of the twisting arm that is, making different designs according to different nose bridge heights and flatness, the operation is simple and the modeling efficiency is high; at the same time, by adding the twisting arm structure to the nose pad, The twisted arm can disperse the load-bearing weight of the stipule body, thereby reducing the user's wearing burden. It can improve the matching between the nose pad and the wearer's nose, and improve the comfort of using glasses. It can also improve modeling efficiency and shorten the design cycle of glasses. .
  • Figure 1 is a schematic structural diagram of glasses according to an embodiment of the present application.
  • FIGS. 2a-2c are schematic diagrams of various angles of nose pads in glasses
  • Figure 3 is a schematic structural diagram of the nose pad according to the embodiment of the present application.
  • Figure 4 is a schematic cross-sectional structural view of the stipule stem in the nose pad according to the embodiment of the present application.
  • Figure 5 is a schematic structural diagram of a nose pad in glasses according to another embodiment of the present application.
  • Figure 6 is a schematic structural diagram of a nose pad in glasses according to another embodiment of the present application.
  • Figure 7 is a schematic flow chart of the glasses modeling method according to the embodiment of the present application.
  • the glasses include a spectacle frame 1, nose pads 2 and spectacle legs 3.
  • the spectacle frame 1 is used to support the lenses.
  • the spectacle legs 3 are supported on the wearer's ears.
  • the nose pad 2 is supported on the bridge of the wearer's nose.
  • the nose pads need to be able to match the bridge of the wearer's nose.
  • the nose pad 2 includes a stipule stem 21 and a stipule 22, and the spectacle frame 1 and the stipule stem 21 are integrally formed by three-dimensional printing.
  • the stipule stem 21 and the stipule 22 have a clearance fit, and there is a movable and adjustable space between them, so that the stipule 22 can be adaptively adjusted according to the nose bridge characteristics of different users, thereby improving the user's comfort in wearing glasses.
  • the stipule stem 21 includes a stipule stem body 212 and a twisting arm 211.
  • the two ends of the twisting arm 211 are connected to the stipule stem body 212 and the spectacle frame 1 respectively.
  • the end of the stipule stem body 212 away from the twisted arm 211 is provided with a stipule button hole 213, and the stipule button hole 213 is used to install the stipule 22.
  • the twisting arm 211 has an adjustable twisting angle and size, and is used to adjust the structure of the entire nose pad 2 to adapt to the nose bridge characteristics of different wearers.
  • the adjustment of the twist angle of the twist arm 211 will not affect the shape of the stipule stem body 212, nor will it affect the structure of the stipule button hole 213 at the end of the stipule stem body 212, nor will it cause the stipule button hole 213 to deform; ensuring that the stipule button hole 213 is deformed.
  • the height and/or shape of the twisting arm 211 can be changed according to the facial features of the wearer, and different designs can be made according to the height and flatness of different nose bridges to adapt to the nose bridge characteristics of different users.
  • the nose bridge characteristics of different users can be adapted, and the load-bearing weight of the nose pads can be dispersed, thereby reducing the user's burden of wearing glasses.
  • the twisting arm 211 includes a first connection end and a second connection end, wherein the first connection end is connected to the glasses frame 1 and the second connection end is connected to the stipule stem body 212 .
  • the distance between the spectacle frame 1 and the stipule body 212 can be adjusted by adjusting the size parameters of the first connection end, such as the height and shape of the first connection end, that is, adjusting the spectacle frame 1 and the nose pads.
  • the setting angle of the nose pad 2 can be adjusted by adjusting the twisting angle of the twisting arm 211, which includes at least one of an oblique angle, a front angle, and a side angle.
  • the size (height and/or shape) and twist angle of the twisting arms can be changed according to the wearer's facial features, so that the glasses can better adapt to the user's wearing habits or to adapt to different wearing needs.
  • the size and/or twisting angle of the twisting arm that is, making different designs according to different nose bridge heights and flatness, the operation is simple and the modeling efficiency is high; at the same time, by adding the twisting arm structure to the nose pad, The twisted arm can disperse the load-bearing weight of the stipule body, thereby reducing the user's wearing burden. It can improve the matching between the nose pad and the wearer's nose, and improve the comfort of using glasses. It can also improve modeling efficiency and shorten the design cycle of glasses. .
  • the front angle ⁇ is the angle between the long axis of the nose pad and the vertical line when viewed from the front of the glasses.
  • the front angle ⁇ is generally 20° to 35°;
  • the bevel angle ⁇ is the angle between the normal line of the nose pad and the plane of the glasses frame when looking down at the nose pads from above the glasses.
  • the bevel angle ⁇ is generally 25° to 35°;
  • the side angle ⁇ is Looking at the nose pads from the side of the glasses, the angle formed by the nose pads and the plane of the glasses frame, the side angle ⁇ is generally 10° to 15°.
  • the details may include:
  • a glasses model with a three-dimensional structure is obtained through the glasses modeling method described in the first aspect, which will not be described again here. Then, the three-dimensional printed glasses frame 1 and the stipule stem 21 are obtained by printing layer by layer using three-dimensional printing technology.
  • Exemplary 3D printing technologies include, but are not limited to: stereolithography (SLA), digital light processing (DLP), three-dimensional printing (3DP), multi-jet fusion (MJF), and various others known in the art The types of 3D printing or additive manufacturing technologies are not limited here.
  • Figure 3 is a schematic structural diagram of the nose pad in an embodiment of the present application
  • Figure 4 is a schematic cross-sectional structural diagram of the stipule stem in the nose pad of the embodiment of the present application.
  • the stipules 22 are stuck in Inside the stipule button hole 213.
  • the stipule 22 includes a holder 221 and a blade 222 connected to the holder 221 .
  • the width of the entrance end of the stipule button hole 213 is smaller than the inner width of the stipule button hole 213 .
  • the stipule button hole 213 is shaped like a prism and is a blind hole.
  • the shape of the stipule button hole 213 may be truncated or columnar, and the stipule button hole 213 may be a blind hole or a perforation, which is not limited here.
  • the blades 222 can be made of elastic material, such as silicone material.
  • the blade 222 can also be formed by three-dimensional printing, or can be produced by injection molding or other production processes, which is not limited here.
  • the supporting pile 221 includes a snap-in part far away from the blade 222 and a connection part close to the blade 222.
  • the snap-in part is in the shape of a trapezoidal block, and the width of the end of the snap-in part away from the connection part is smaller than the width of the end of the snap-in part close to the connection part.
  • Width that is, the clamping portion has two slopes. The design of the slope is conducive to the clamping portion being able to snap into the stipule button hole 213.
  • the width of the connecting portion is smaller than the entrance width of the stipule button hole 213, so that the connecting portion is not in contact with the stipule button hole 213. 213 has a gap between the inlet ends.
  • FIG. 5 is a schematic structural diagram of a nose pad in another embodiment of the present application.
  • the stipule button hole 213 is a through hole.
  • the end of the stipule stem body 212 away from the twisted arm 211 is connected to the stipule button hole 213.
  • the stipule 22 can enter the stipule button hole 213 through the cutout 214 and be locked in the stipule button hole 213.
  • the width of the holder 221 is greater than the width of the cutout 214, so that the holder 221 squeezes into the holder button hole 213 through the elastic deformation of the cutout, and prevents the holder 22 from falling off from the cutout 214 after the assembly is completed.
  • Figure 6 is a schematic structural diagram of a nose pad in another embodiment of the present application.
  • the end of the stipule stem body 212 away from the twisted arm 211 is rolled to form a stipule button hole 213.
  • the stipule button hole 213 is a through hole, and the stipule is The buttonhole 213 is circular.
  • the rolled end of the stipule stem body 212 is against the stipule stem body 212 to form a cutout 214, through which the stipule 22 can enter the stipule button hole 213.
  • the support pile 221 includes structures such as a stipule handle, a support cap and a limiting part.
  • the diameter of the support cap is less than or equal to the width of the stipule button hole 213.
  • the diameter of the stipule handle is greater than the width of the cutout 214 and smaller than the width of the stipule button hole 213.
  • the width allows the holder 221 to enter the holder button hole 213 through the elastic deformation of the cutout 214, and prevents the holder 22 from falling off from the cutout 214 after the assembly is completed.
  • the limiting portion is used to limit the rotation angle of the stipe 22 after installation, and the width of the limiting portion is less than or equal to the width of the opening slot.
  • FIG. 7 is a schematic flowchart of a glasses modeling method according to an embodiment of the present application.
  • the glasses modeling method provided by this application includes the following steps S1 to S5:
  • Step S1 Obtain three-dimensional facial feature data of the wearer's head, where the three-dimensional facial feature data includes position data of multiple feature points;
  • Step S2 determine the wearer's glasses type and glasses parameters based on a preset glasses database
  • Step S3 generate a glasses frame model based on the glasses parameters and at least part of the three-dimensional facial feature data
  • Step S4 Generate a stipule model on the glasses frame model.
  • the stipule model includes a stipule body and a twisted arm. The twisted arm connects the stipule body and the glasses frame model;
  • Step S5 According to the glasses frame model and at least part of the three-dimensional facial feature data, adjust the model parameters of the twist arm to obtain a glasses model.
  • the model parameters of the twist arm include size parameters and/or twist angles.
  • the distance between the spectacle frame and the stipule body i.e., the nose pad
  • the distance between the spectacle frame and the stipule body can be realized by adjusting the size parameters during the modeling process, and it will not affect the shape of the entire nose pad.
  • Shape You can also adjust the twisting angle of the twisting arm to adjust the end of the twisting arm connected to the stipule body. This will not affect the shape of the stipule body, nor will it affect the structure of the stipule button hole at the end of the stipule body. , will not cause deformation of the stipule buttonhole; ensure the correct assembly angle of the stipule stem and stipule and the fit of the nose pad and the wearer's nose bridge.
  • the matching of the nose pads to the wearer's nose can be improved, and the comfort of using glasses can be improved. It can also improve the modeling efficiency and shorten the design cycle of glasses.
  • Step S1 Obtain three-dimensional facial feature data of the wearer's head, where the three-dimensional facial feature data includes position data of multiple feature points.
  • three-dimensional facial feature data of the wearer's head can be obtained through a three-dimensional scanning measurement method.
  • machine vision methods can be used to three-dimensionally scan the wearer's head to obtain three-dimensional scan image data of the wearer's head, and then use predetermined three-dimensional modeling software to reconstruct a three-dimensional model based on the three-dimensional scan image data to obtain a three-dimensional model of the head.
  • position data of multiple feature points of the three-dimensional face of the three-dimensional head model are extracted.
  • the position data may be three-dimensional coordinate information of each feature point.
  • a mobile phone with a clear camera can also be used to shoot the user's head from multiple angles to collect multiple head feature image data of the user for use in three-dimensional modeling software to establish a three-dimensional model of the head; or
  • the user's head data can be obtained through other methods for three-dimensional reconstruction, which is not limited in this application.
  • the three-dimensional modeling software used in this embodiment can be existing on the market, such as Maya, C4D, etc., as long as it can perform three-dimensional reconstruction based on the user's head data to obtain a three-dimensional head model that meets the needs.
  • the multiple feature points of the three-dimensional face include face contour points, eyebrow arch points, eyebrow starting points, eyebrow end points, inner corner points, outer corner points, pupil points, temple points, zygomatic points, cheek points, At least one characteristic point among the nose root point, the nose tip point, the left and right nose side points, the left and right mouth corner points, the chin bottom point, the ear base point and the auricle point. In other implementations, more or fewer facial feature points can also be extracted.
  • the facial feature parameters of the wearer can be measured. For example, the distance between the right pupil point and the left The distance between the midpoint of the right pupil point is used to obtain the reference interpupillary distance parameter of the right eye, the distance between the left pupil point and the midpoint of the left and right pupil points is used to obtain the reference interpupillary distance parameter of the left eye, the distance between the left and right temple points is used to obtain the temporal distance parameter, etc.
  • Step S2 Determine the wearer's glasses type and glasses parameters based on a preset glasses database.
  • the wearer can select a suitable type of glasses in the glasses database according to preferences.
  • a suitable glasses type can be selected from the eye database based on the wearer's three-dimensional facial feature data.
  • the type of glasses can be selected according to your needs and is not limited here.
  • the glasses database includes various types of glasses.
  • the glasses type is the style of the glasses frame, which can be square-frame glasses, round-frame glasses, polygon-frame glasses, etc.
  • the glasses parameters are generated, and the glasses parameters include at least one of frame parameters, stipule parameters, and temple parameters.
  • the initially generated glasses parameters are preset standard parameters.
  • the frame parameters include, for example, the size of the glasses frame (such as frame width, thickness, height, etc.), mirror inclination angle and other information;
  • the stipule parameters include, for example, the relative position of the stipule stalk and the glasses frame, the front angle of the nose pads, and the inclination of the nose pads.
  • the temple parameters may include, for example, information such as the length of the temple.
  • Step S3 Generate a glasses frame model based on the glasses parameters and at least part of the three-dimensional facial feature data.
  • step S3 specifically includes:
  • the standard glasses frame model is adjusted according to at least part of the three-dimensional facial feature data to obtain a glasses frame model that matches the wearer; wherein at least part of the three-dimensional facial feature data includes eyebrow arch points, inner canthus points, Position data of at least one feature point among the outer canthus point, pupil point, temple point, cheekbone point, left and right nasal side points, ear base point and auricle point.
  • Step S4 Generate a stipule model on the glasses frame model.
  • the stipule model includes a stipule body and a twisted arm. The twisted arm connects the stipule body and the glasses frame model.
  • a stipule model is generated on the glasses frame model according to the stipule parameters of the glasses parameters.
  • the stipule model includes the stipule body and a twisted arm, and the twisted arms are connected The stipule body and the glasses frame model.
  • the twisting arm includes a first connecting end and a second connecting end, wherein the first connecting end is connected to the spectacle frame to adjust the distance between the spectacle frame and the stipule body, that is, to adjust the distance between the spectacle frame and the nose pads. distance.
  • the second connecting end is connected to the stipule stem body to adjust the twisting angle of the twisting arm.
  • the twisting angle includes at least one of bevel angle, front angle and side angle, that is, adjusting the setting angle of the nose pad.
  • the second connecting end of the twisting arm is generally S-shaped, receives the twist and is connected to the stipule body.
  • Step S5 Adjust the model parameters of the twist arm according to the glasses frame model and at least part of the three-dimensional facial feature data to obtain a glasses model.
  • the distance between the nose pads and the glasses frame, the nose pad bevel angle, the nose pad front angle, and the nose pad side angle are obtained, and the twist arm is adjusted, for example Contract and stretch the first connecting end of the twisted arm to adjust the distance between the nose pad and the spectacle frame; change the shape and/or angle of the second connecting end to adjust at least one of the bevel, front angle, and side angle of the nose pad.
  • the distance between the nose pad and the spectacle frame is adjusted by adjusting the first connection end of the twisted arm, and at least one of the bevel angle, front angle, and side angle of the nose pad is adjusted by adjusting the second connection end, so as not to Affects the shape of the entire stipule body. Due to the existence of the twisted arm, the twisting arm is used to avoid the deformation of the entire stipule during the modeling process.
  • the stipule has a large adjustment range to ensure the correct alignment of the stipule and the blade.
  • the assembly angle and the fitting angle of the nose pads to the angle of the wearer's nose bridge have high modeling efficiency, shorten the design cycle of glasses, and improve the user's wearing comfort.
  • the method also includes:
  • a temple model according to the temple parameters of the glasses parameters and at least part of the three-dimensional facial feature data; wherein at least part of the three-dimensional facial feature data includes at least one of a temple point, an ear base point, and an auricle point.
  • Location data of feature points is generated according to the temple parameters of the glasses parameters and at least part of the three-dimensional facial feature data; wherein at least part of the three-dimensional facial feature data includes at least one of a temple point, an ear base point, and an auricle point.
  • a standard temple model is obtained according to the temple parameters of the glasses parameters; and then the standard temple model is adjusted based on at least part of the three-dimensional facial feature data to obtain a temple model that matches the wearer.
  • the glasses model After obtaining the glasses frame model, temple model and stipule model that match the wearer, the glasses model can be generated.
  • the glasses modeling method provided by this application can adjust the model parameters of the twisted arm.
  • the distance between the glasses frame and the stipule body i.e., the nose pad
  • the size parameters Affects the shape of the entire nose pad; you can also adjust the twist angle of the twist arm to adjust the end of the twist arm connected to the stipule body. This will not affect the shape of the stipule body, let alone the support at the end of the stipule body.
  • the structure of the leaf button hole will not cause the stipule button hole to deform; it ensures the correct assembly angle of the stipule stem and stipule and the fit of the nose pad and the wearer's nose bridge.
  • the matching of the nose pads to the wearer's nose can be improved, and the comfort of using glasses can be improved. It can also improve the modeling efficiency and shorten the design cycle of glasses.

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Abstract

一种眼镜建模方法及眼镜，方法包括：获取佩戴者头部的三维面部特征数据，三维面部特征数据包括多个特征点的位置数据(S1)；基于预设的眼镜数据库确定佩戴者的眼镜类型以及眼镜参数(S2)；根据眼镜参数和至少部分的三维面部特征数据，生成眼镜框模型(S3)；在眼镜框模型上生成托叶梗模型，托叶梗模型包括托叶梗本体(212)及扭曲臂(211)，扭曲臂(211)连接托叶梗本体(212)与眼镜框模型(S4)；根据眼镜框模型和至少部分的三维面部特征数据，调整扭曲臂的模型参数，得到眼镜模型，扭曲臂(211)的模型参数包括尺寸参数和/或扭曲角度(S5)。眼镜建模方法及眼镜，能够提高鼻托(2)与佩戴者鼻部的匹配度，提高眼镜使用的舒适性。

Description

眼镜建模方法及眼镜
本申请要求于2022年08月17日提交中国专利局，申请号为202210987156.8、发明名称为“眼镜建模方法及眼镜”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及三维打印眼镜技术领域，尤其涉及眼镜建模方法及眼镜。
背景技术
眼镜的使用已经非常普及，有更多的人需要眼镜来维持日常的工作和生活，一种新形势的定制眼镜开始出现，即根据顾客的偏好、面部特征等个性化特征，为个人客户进行单独的、私人的眼镜设计和眼镜定制形式。
眼镜包括眼镜框和鼻托，鼻托是眼镜的重要组成部分，是眼镜框在鼻梁上起支撑作用的部件，在个性化设计中，要想保持佩戴者的舒适，鼻托位置影响着佩戴者佩戴定制眼镜时的舒适度。目前在眼镜建模过程中，鼻托与佩戴者鼻部的匹配度难以调整。
申请内容
本申请实施例提供眼镜建模方法及眼镜，能够提高鼻托与佩戴者鼻部的匹配度，提高眼镜使用的舒适性。
本申请实施例提供一种眼镜建模方法，所述方法包括：
获取佩戴者头部的三维面部特征数据，所述三维面部特征数据包括多个特征点的位置数据；
基于预设的眼镜数据库确定所述佩戴者的眼镜类型以及眼镜参数；
根据所述眼镜参数和至少部分的所述三维面部特征数据，生成眼镜框模型；
在所述眼镜框模型上生成托叶梗模型，所述托叶梗模型包括托叶梗本体及扭曲臂，所述扭曲臂连接所述托叶梗本体与所述眼镜框模型；
根据所述眼镜框模型和至少部分的所述三维面部特征数据，调整扭曲臂的模型参数，得到眼镜模型，所述扭曲臂的模型参数包括尺寸参数和/或扭曲角度。
在一些实施方式中，所述根据所述眼镜框模型和至少部分的所述三维面部特征数据，调整扭曲臂的模型参数，包括：
调节所述扭曲臂的尺寸参数，以调节所述托叶梗本体与所述眼镜框模型之间的距离；和/或
调节所述扭曲臂的扭曲角度，所述扭曲角度包括斜角、前角和侧角中至少一个。
在一些实施方式中，所述眼镜模型还包括托叶，所述托叶与所述托叶梗本体连接。
在一些实施方式中，所述眼镜参数包括镜框参数、托叶梗参数、镜腿参数中至少一种。
在一些实施方式中，所述多个特征点包括脸廓点、眉弓点、眉毛起点、眉毛尾点、内眼角点、外眼角点、瞳孔点、太阳穴点、颧骨点、脸颊点、鼻根点、鼻尖点、左右鼻侧点、左右嘴角点、下巴底点、耳根点和耳廓点中的至少一个特征点。
在一些实施方式中，所述眼镜参数包括镜框参数，所述根据所述眼镜参数和至少部分的所述三维面部特征数据，生成眼镜框模型，包括：
根据所述眼镜参数的镜框参数，得到标准眼镜框模型；
根据至少部分的所述三维面部特征数据调整所述标准眼镜框模型，得到与所述佩戴者匹配的眼镜框模型；其中，至少部分的所述三维面部特征数据包括眉弓点、内眼角点、外眼角点、瞳孔点、太阳穴点、颧骨点、左右鼻侧点、耳根点和耳廓点中的至少一个特征点的位置数据。
在一些实施方式中，所述眼镜参数包括镜腿参数，所述方法还包括：
根据所述眼镜参数的镜腿参数和至少部分的所述三维面部特征数据，生成眼镜腿模型；其中，至少部分的所述三维面部特征数据包括太阳穴点、耳根点和耳廓点中的至少一个特征点的位置数据。
在一些实施方式中，在所述根据所述眼镜框模型和至少部分的所述三维面部特征数据，调整扭曲臂的模型参数的步骤中，所述至少部分的所述三维面部特征数据包括鼻根点、鼻尖点、左右鼻侧点中至少一个特征点的位置数据。
在一些实施方式中，所述获取佩戴者头部的三维面部特征数据，包括：
通过三维扫描测量方法获得佩戴者头部的多个三维面部特征点的位置数据。
第二方面，本申请提供一种眼镜，所述眼镜包括眼镜框和鼻托，所述鼻托包括托叶梗，所述托叶梗包括托叶梗本体及扭曲臂，所述扭曲臂的两端分别连接所述眼镜框与所述托叶梗本体，所述扭曲臂具有可调节的扭曲角度及尺寸，用于调整所述鼻托。
在一些实施方式中，所述扭曲角度包括斜角、前角和侧角中至少一个。
在一些实施方式中，所述鼻托还包括托叶，所述托叶梗与所述托叶间隙配合。
在一些实施方式中，所述托叶梗本体远离所述扭曲臂的一端设有托叶扣孔，所述托叶卡设于所述托叶扣孔内。
在一些实施方式中，所述托叶包括托桩及与所述托桩连接的叶片，所述托叶扣孔的入口端宽度小于所述托叶扣孔的孔内宽度，所述托桩卡设于所述托叶扣孔内，且所述托叶扣孔的入口端与所述托桩的侧壁之间具有活动间隙。
在一些实施方式中，所述托叶梗本体远离所述扭曲臂的一端设有与所述托叶扣孔相连通的切口；所述托叶通过所述切口进入所述托叶扣孔，并卡设于所述托叶扣孔内。
在一些实施方式中，所述托叶包括托桩及与所述托桩连接的叶片，所述托桩的宽度大于所述切口的宽度。
本申请的技术方案至少具有以下有益的效果：
本申请提供的眼镜建模方法，通过调整扭曲臂的模型参数，在建模过程，通过调节尺寸参数即可实现眼镜框与托叶梗本体(即鼻托)之间的距离的调节，并不会影响整个鼻托的形状；还可以通过调节扭曲臂的扭曲角度，调整扭曲臂与托叶梗本体连接的一端，不会影响托叶梗本体的形状，更不会影响托叶梗本体末端的托叶扣孔的结构，不会导致托叶扣孔变形；保障托叶梗与托叶的正确组装角度以及鼻托与佩戴者鼻梁的贴合度。通过获取佩戴者的三维面部特征数据，适应性调整扭曲臂，可以提高鼻托与佩戴者鼻部的匹配度，提高眼镜使用的舒适性；还能够提高建模效率，缩短眼镜的设计周期。
本申请提供的眼镜，可以根据佩戴者的面部特征来改变扭曲臂的尺寸(高度和/或形状)、扭曲角度，使得眼镜能够更加适应用户的佩戴习惯，或适应不同的佩戴需求。在实际应用过程中，通过调节扭曲臂的尺寸和/或扭曲角度，即根据不同的鼻梁高低扁平做不同的设计，操作简单，建模效率高；同时，通过在鼻托中增加扭曲臂结构，扭曲臂可以分散托叶梗本体的承重，从而减轻用户的佩戴负担，可以提高鼻托与佩戴者鼻部的匹配度，提高眼镜使用的舒适性；还能够提高建模效率，缩短眼镜的设计周期。
利用应当理解的是，以上的一般描述和后文的细节描述仅是示例性的，并不能限制本申请。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例的眼镜的结构示意图；
图2a-图2c为眼镜中鼻托各角度的示意图；
图3为本申请实施例的鼻托结构示意图；
图4为本申请实施例的鼻托中的托叶梗的剖面结构示意图；
图5为本申请另一实施例的眼镜中鼻托的结构示意图；
图6为本申请又一实施例的眼镜中鼻托的结构示意图；
图7为本申请实施例的眼镜建模方法的流程示意图；
附图标记：
1-眼镜框；
2-鼻托；21-托叶梗；211-扭曲臂；212-托叶梗本体；213-托叶扣孔；214-切口；22-托叶；
221-托桩；222-叶片；
3-眼镜腿；α-前角；β-斜角；γ-侧角。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
为了更好的理解本申请的技术方案，下面结合附图对本申请实施例进行详细描述。
应当明确，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
在本申请实施例中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本申请。在本申请实施例和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其它含义。
应当理解，本文中使用的术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本申请提供一种眼镜，如图1所示，眼镜包括眼镜框1、鼻托2和眼镜腿3，眼镜框1用于支撑镜片，眼镜在佩戴使用时，眼镜腿3支撑在佩戴者的耳朵上，鼻托2支撑在佩戴者的鼻梁上，想要提高佩戴者的舒适度，鼻托需要能够匹配佩戴者的鼻梁。
在一些实施方式中，鼻托2包括托叶梗21和托叶22，眼镜框1和托叶梗21由三维打印一体成型。托叶梗21与托叶22间隙配合，两者之间存在可活动调整的空间，从而使托叶22可根据不同用户的鼻梁特征适应性地进行调整，提高了用户佩戴眼镜的舒适度。
具体地，托叶梗21包括托叶梗本体212及扭曲臂211，扭曲臂211的两端分别连接托叶梗本体212与眼镜框1。托叶梗本体212远离扭曲臂211的一端设有托叶扣孔213，托叶扣孔213用于安装托叶22。
在本实施例中，扭曲臂211具有可调节的扭曲角度及尺寸，用于调整整个鼻托2的结构，以适应不同佩戴者的鼻梁特征。扭曲臂211的扭曲角度调整，不会影响托叶梗本体212的形状，更不会影响托叶梗本体212末端的托叶扣孔213的结构，不会导致托叶扣孔213变形；保障托叶梗21与托叶22的正确组装角度以及鼻托与佩戴者鼻梁的贴合度。
扭曲臂211的尺寸参数调整，可以根据佩戴者的面部特征来改变扭曲臂211的高度和/或形状，可以根据不同的鼻梁高低扁平做不同的设计，以适应不同用户的鼻梁特征。
可以理解地，通过扭曲臂211的设置，可适应不同用户的鼻梁特征，且分散鼻托的承重，减轻了用户佩戴眼镜的负担。
进一步地，扭曲臂211包括第一连接端及第二连接端，其中，第一连接端连接眼镜框1，第二连接端连接托叶梗本体212。在一些实施方式中，可以通过调节第一连接端的尺寸参数，例如第一连接端的设置高度以及形状，来调节眼镜框1和托叶梗本体212之间的距离，即调节眼镜框1与鼻托2之间的距离。可以通过调节扭曲臂211的扭曲角度，扭曲角度包括斜角、前角和侧角中至少一个，即调节鼻托2设置角度。
可以理解地，在本方案中，可以根据佩戴者的面部特征来改变扭曲臂的尺寸(高度和/或形状)、扭曲角度，使得眼镜能够更加适应用户的佩戴习惯，或适应不同的佩戴需求。在实际应用过程中，通过调节扭曲臂的尺寸和/或扭曲角度，即根据不同的鼻梁高低扁平做不同的设计，操作简单，建模效率高；同时，通过在鼻托中增加扭曲臂结构，扭曲臂可以分散托叶梗本体的承重，从而减轻用户的佩戴负担，可以提高鼻托与佩戴者鼻部的匹配度，提高眼镜使用的舒适性；还能够提高建模效率，缩短眼镜的设计周期。
需要说明的是，如图2a所示，前角α为从眼镜的正前方观察，鼻托长轴与垂线的一个夹角，前角α一般为20°～35°；如图2b所示，斜角β为从眼镜的上方俯视鼻托，鼻托平面与眼镜框平面法线之间的一个夹角，斜角β一般为25°～35°；如图2c所示，侧角γ为从眼镜的侧方观察鼻托，鼻托与眼镜框平面构成的一个夹角，侧角γ一般为10°～15°。
在利用三维打印方法一体成型眼镜框1与托叶梗21时，具体可以包括：
通过上述第一方面所述的眼镜建模方法得到具有三维结构的眼镜模型，在此不再赘述。再通过三维打印技术逐层打印得到三维打印的眼镜框1和托叶梗21。可使用的示例性3D打印技术包括但不限于：立体光刻(SLA)、数字光处理(DLP)、三维印刷技术(3DP)、多射流熔融技术(MJF)以及本领域已知的各种其他种类的3D打印或增材制造技术，在此不作限定。
图3为本申请一实施例中鼻托的结构示意图，图4为本申请实施例的鼻托中的托叶梗的剖面结构示意图；如图3及图4所示，托叶22卡设于托叶扣孔213内。托叶22包括托桩221及与所述托桩221连接的叶片222，托叶扣孔213的入口端宽度小于托叶扣孔213的孔内宽度。在一些实施方式中，托叶扣孔213的形状呈棱台状，且为盲孔。在其它实施方式中，托叶扣孔213的形状可为圆台状或柱状，托叶扣孔213可为盲孔或穿孔，在此不作限定。
如图3所示，托桩221的一端卡设于所述托叶扣孔213内，托桩221的另一端连接叶片222。托叶扣孔213的入口端与托桩221的侧壁之间具有间隙，使得托叶梗21和托叶22之间间隙配合。在一些实施方式中，叶片222可以使用弹性材料制作，例如硅胶材料。叶片222也可以通过三维打印成型，也可以通过注塑或其他生产工艺制得，在此不做限定。
进一步地，托桩221包括远离叶片222的卡接部和靠近叶片222的连接部，卡接部呈梯形块状，卡接部远离连接部的一端的宽度小于卡接部靠近连接部的一端的宽度，即卡接部具有两个斜面，斜面的设计有利于卡接部能够卡入托叶扣孔213中，连接部的宽度小于托叶扣孔213的入口宽度，使得连接部与托叶扣孔213的入口端之间具有间隙。
图5为本申请另一实施例中鼻托的结构示意图，托叶扣孔213为通孔，托叶梗本体212远离所述扭曲臂211的一端设有与所述托叶扣孔213相连通的切口214，托叶22可通过切口214进入托叶扣孔213，并卡设于所述托叶扣孔213内。具体地，托桩221的宽度大于切口214的宽度，使得托桩221通过切口的弹性形变挤进托叶扣孔213内，并能够防止托叶22装配完成后从切口214中脱落。
图6为本申请又一实施例中鼻托的结构示意图，托叶梗本体212远离所述扭曲臂211的一端卷绕形成托叶扣孔213，托叶扣孔213为通孔，且托叶扣孔213为圆形。托叶梗本体212卷绕的一端与托叶梗本体212相抵形成切口214，托叶22可通过切口214进入托叶扣孔213。托桩221包括托叶柄、托帽和限位部等结构，托帽直径小于等于托叶扣孔213的孔内宽度，托叶柄的直径大于切口214的宽度且小于托叶扣孔213的孔内宽度，使得托桩221通过切口214的弹性形变进入托叶扣孔213，并防止托叶22装配完成后从切口214中脱落。限位部用于限制托叶22安装后转动的角度，限位部的宽度小于等于开口槽的宽度。
图7为本申请实施例的眼镜建模方法的流程示意图，本申请提供的眼镜建模方法，包括以下步骤S1至步骤S5：
步骤S1，获取佩戴者头部的三维面部特征数据，所述三维面部特征数据包括多个特征点的位置数据；
步骤S2，基于预设的眼镜数据库确定所述佩戴者的眼镜类型以及眼镜参数；
步骤S3，根据所述眼镜参数和至少部分的所述三维面部特征数据，生成眼镜框模型；
步骤S4，在所述眼镜框模型上生成托叶梗模型，所述托叶梗模型包括托叶梗本体及扭曲臂，所述扭曲臂连接所述托叶梗本体与所述眼镜框模型；
步骤S5，根据所述眼镜框模型和至少部分的所述三维面部特征数据，调整扭曲臂的模型参数，得到眼镜模型，所述扭曲臂的模型参数包括尺寸参数和/或扭曲角度。
在本方案中，通过调整扭曲臂的模型参数，在建模过程，通过调节尺寸参数即可实现眼镜框与托叶梗本体(即鼻托)之间的距离，并不会影响整个鼻托的形状；还可以通过调节扭曲臂的扭曲角度，调整扭曲臂与托叶梗本体连接的一端，不会影响托叶梗本体的形状，更不会影响托叶梗本体末端的托叶扣孔的结构，不会导致托叶扣孔变形；保障托叶梗与托叶的正确组装角度以及鼻托与佩戴者鼻梁的贴合度。通过获取佩戴者的三维面部特征数据，适应性调整扭曲臂，可以提高鼻托与佩戴者鼻部的匹配度，提高眼镜使用的舒适性；还能够提高建模效率，缩短眼镜的设计周期。
以下结合实施例详细阐述本方案：
步骤S1，获取佩戴者头部的三维面部特征数据，所述三维面部特征数据包括多个特征点的位置数据。
在一些实施方式中，可以通过三维扫描测量方法获取佩戴者头部的三维面部特征数据。具体地，可以采用机器视觉方法对佩戴者的头部进行三维扫描，获得佩戴者头部三维扫描图像数据，再利用预定的三维建模软件基于三维扫描图像数据进行三维模型重建得到头部三维模型。基于得到的头部三维模型，提取头部三维模型的三维面部的多个特征点的位置数据。位置数据可以是各特征点的三维坐标信息。
在另一些实施方式中，还可以利用带有清晰摄像头的手机对用户头部进行多角度拍摄，以采集用户的多张头部特征图像数据用于三维建模软件建立头部三维模型；或者还可以通过其他的方式获取用户头部数据以用于三维重建，本申请中不做限制。本实施例中使用的三维建模软件可以是市面上已有的例如Maya、C4D等，只要能基于用户头部数据进行三维重建得到满足需求的头部三维模型即可。
在本实施例中，三维面部的多个特征点包括脸廓点、眉弓点、眉毛起点、眉毛尾点、内眼角点、外眼角点、瞳孔点、太阳穴点、颧骨点、脸颊点、鼻根点、鼻尖点、左右鼻侧点、左右嘴角点、下巴底点、耳根点和耳廓点中的至少一个特征点。在其他实施方式中，还可以提取更多或更少的面部特征点。
具体地，通过提取多个特征点的位置数据，并根据任意两个特征点位置数据测量两个特征点之间的距离，从而可以测量得到佩戴者的面部特征参数。例如，可以根据右瞳孔点距左 右瞳孔点中点距离得到右眼参考瞳距参数、左瞳孔点距左右瞳孔点中点距离得到左眼参考瞳距参数、左右太阳穴点距离得到颞距参数等等。
步骤S2，基于预设的眼镜数据库确定所述佩戴者的眼镜类型以及眼镜参数。
在一些实施方式中，佩戴者可以根据喜好，在眼镜数据库中选择适合的眼镜类型。在其他实施方式中，可以根据佩戴者的三维面部特征数据，在眼睛数据库中选取适合的眼镜类型。确定眼镜类型可以根据需求选择，在此不作限定。眼镜数据库包括各式各样的眼镜类型，眼镜类型为眼镜架的款式，可以是方框眼镜、圆框眼镜、多边形框眼镜等等。
在确定眼镜类型后，生成眼镜参数，眼镜参数包括镜框参数、托叶梗参数、镜腿参数中的至少一种。需要说明的是，初始生成的眼镜参数是预设的标准参数。其中，镜框参数例如包括眼镜框大小(如眼镜框宽度、厚度、高度等)、镜面倾斜角度等信息；托叶梗参数例如包括托叶梗与眼镜框相对位置、鼻托前角、鼻托斜角、鼻托侧角等信息；需要说明的是，托叶梗与眼镜框相对位置可以通过鼻托中的扭曲臂的尺寸参数进行调整；鼻托前角、鼻托斜角、鼻托侧角可以通过鼻托中的扭曲臂的扭曲角度进行调整。镜腿参数例如可包括镜腿长度等信息。
步骤S3，根据所述眼镜参数和至少部分的所述三维面部特征数据，生成眼镜框模型。
在一些实施方式中，步骤S3，具体包括：
根据确定的眼镜参数的眼镜框参数，得到标准眼镜框模型；
根据至少部分的所述三维面部特征数据调整所述标准眼镜框模型，得到与所述佩戴者匹配的眼镜框模型；其中，至少部分的所述三维面部特征数据包括眉弓点、内眼角点、外眼角点、瞳孔点、太阳穴点、颧骨点、左右鼻侧点、耳根点和耳廓点中的至少一个特征点的位置数据。
步骤S4，在所述眼镜框模型上生成托叶梗模型，所述托叶梗模型包括托叶梗本体及扭曲臂，所述扭曲臂连接所述托叶梗本体与所述眼镜框模型。
在得到与所述佩戴者匹配的眼镜框模型后，根据眼镜参数的托叶梗参数，在眼镜框模型上生成托叶梗模型，托叶梗模型包括托叶梗本体及扭曲臂，扭曲臂连接所述托叶梗本体与所述眼镜框模型。
具体地，扭曲臂包括第一连接端及第二连接端，其中，第一连接端连接眼镜框，以调节眼镜框和托叶梗本体之间的距离，即调节眼镜框与鼻托之间的距离。第二连接端连接托叶梗本体，调节扭曲臂的扭曲角度，扭曲角度包括斜角、前角和侧角中至少一个，即调节鼻托设置角度。
在一些实施方式中，扭曲臂的第二连接端大体呈S型，承接扭转并连接至托叶梗本体。 通过调节扭曲臂的扭曲角度，调整扭曲臂与托叶梗本体连接的一端，不会影响托叶梗本体的形状，更不会影响托叶梗本体末端的托叶扣孔的结构，不会导致托叶扣孔变形；保障托叶梗与托叶的正确组装角度以及鼻托与佩戴者鼻梁的贴合度。
步骤S5，根据所述眼镜框模型和至少部分的所述三维面部特征数据，调整扭曲臂的模型参数，得到眼镜模型。
在本实施例中，根据眼镜框模型和至少部分的所述三维面部特征数据，得到鼻托与眼镜框的距离、鼻托斜角、鼻托前角、鼻托侧角，调整扭曲臂，例如收缩拉伸扭曲臂的第一连接端，以调节鼻托与眼镜框的距离；改变第二连接端的形状和/或角度，以调节鼻托的斜角、前角、侧角中至少一个。
在本方案中，通过调节扭曲臂的第一连接端以调整鼻托与眼镜框的距离，通过调节第二连接端以调节鼻托的斜角、前角、侧角中的至少一个，从而不影响整个托叶梗本体的形状，由于扭曲臂的存在承接扭转，避免了整个托叶梗在建模过程中的变形，且托叶梗具有较大的调整范围，保证托叶梗与叶片的正确组装角度以及鼻托与佩戴者鼻梁角度的贴合角度，建模效率高，缩短眼镜的设计周期，并提高用户佩戴舒适度。
进一步地，所述方法还包括：
根据所述眼镜参数的镜腿参数和至少部分的所述三维面部特征数据，生成眼镜腿模型；其中，至少部分的所述三维面部特征数据包括太阳穴点、耳根点和耳廓点中的至少一个特征点的位置数据。
具体地，根据眼镜参数的镜腿参数，得到标准镜腿模型；再根据至少部分的所述三维面部特征数据调整标准镜腿模型，得到与所述佩戴者匹配的镜腿模型。
在得到与所述佩戴者匹配的眼镜框模型、镜腿模型以及托叶梗模型后，即可以生成眼镜模型。
本申请提供的眼镜建模方法，能够通过调整扭曲臂的模型参数，在建模过程，通过调节尺寸参数即可实现眼镜框与托叶梗本体(即鼻托)之间的距离，并不会影响整个鼻托的形状；还可以通过调节扭曲臂的扭曲角度，调整扭曲臂与托叶梗本体连接的一端，不会影响托叶梗本体的形状，更不会影响托叶梗本体末端的托叶扣孔的结构，不会导致托叶扣孔变形；保障托叶梗与托叶的正确组装角度以及鼻托与佩戴者鼻梁的贴合度。通过获取佩戴者的三维面部特征数据，适应性调整扭曲臂，可以提高鼻托与佩戴者鼻部的匹配度，提高眼镜使用的舒适性；还能够提高建模效率，缩短眼镜的设计周期。
以上仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之 内，所做的任何修改、等同替换、改进等，均应包含在本申请保护的范围之内。

Claims (16)

  1. 一种眼镜建模方法，其特征在于，所述方法包括：
    获取佩戴者头部的三维面部特征数据，所述三维面部特征数据包括多个特征点的位置数据；
    基于预设的眼镜数据库确定所述佩戴者的眼镜类型以及眼镜参数；
    根据所述眼镜参数和至少部分的所述三维面部特征数据，生成眼镜框模型；
    在所述眼镜框模型上生成托叶梗模型，所述托叶梗模型包括托叶梗本体及扭曲臂，所述扭曲臂连接所述托叶梗本体与所述眼镜框模型；
    根据所述眼镜框模型和至少部分的所述三维面部特征数据，调整扭曲臂的模型参数，得到眼镜模型，所述扭曲臂的模型参数包括尺寸参数和/或扭曲角度。
  2. 根据权利要求1所述的方法，其特征在于，所述根据所述眼镜框模型和至少部分的所述三维面部特征数据，调整扭曲臂的模型参数，包括：
    调节所述扭曲臂的尺寸参数，以调节所述托叶梗本体与所述眼镜框模型之间的距离；和/或
    调节所述扭曲臂的扭曲角度，所述扭曲角度包括斜角、前角和侧角中至少一个。
  3. 根据权利要求1所述的方法，其特征在于，所述眼镜模型还包括托叶，所述托叶与所述托叶梗本体连接。
  4. 根据权利要求1所述的方法，其特征在于，所述眼镜参数包括镜框参数、托叶梗参数、镜腿参数中至少一种。
  5. 根据权利要求1所述的方法，其特征在于，所述多个特征点包括脸廓点、眉弓点、眉毛起点、眉毛尾点、内眼角点、外眼角点、瞳孔点、太阳穴点、颧骨点、脸颊点、鼻根点、鼻尖点、左右鼻侧点、左右嘴角点、下巴底点、耳根点和耳廓点中的至少一个特征点。
  6. 根据权利要求5所述的方法，其特征在于，所述眼镜参数包括镜框参数，所述根据所述眼镜参数和至少部分的所述三维面部特征数据，生成眼镜框模型，包括：
    根据所述眼镜参数的镜框参数，得到标准眼镜框模型；
    根据至少部分的所述三维面部特征数据调整所述标准眼镜框模型，得到与所述佩戴者匹配的眼镜框模型；其中，至少部分的所述三维面部特征数据包括眉弓点、内眼角点、外眼角点、瞳孔点、太阳穴点、颧骨点、左右鼻侧点、耳根点和耳廓点中的至少一个特征点的位置数据。
  7. 根据权利要求5所述的方法，其特征在于，所述眼镜参数包括镜腿参数，所述方法还包括：
    根据所述眼镜参数的镜腿参数和至少部分的所述三维面部特征数据，生成眼镜腿模型；其中，至少部分的所述三维面部特征数据包括太阳穴点、耳根点和耳廓点中的至少一个特征点的位置数据。
  8. 根据权利要求5所述的方法，其特征在于，在所述根据所述眼镜框模型和至少部分的所述三维面部特征数据，调整扭曲臂的模型参数的步骤中，所述至少部分的所述三维面部特征数据包括鼻根点、鼻尖点、左右鼻侧点中至少一个特征点的位置数据。
  9. 根据权利要求1～8任一项所述的方法，其特征在于，所述获取佩戴者头部的三维面部特征数据，包括：
    通过三维扫描测量方法获得佩戴者头部的多个三维面部特征点的位置数据。
  10. 一种眼镜，其特征在于，所述眼镜包括眼镜框和鼻托，所述鼻托包括托叶梗，所述托叶梗包括托叶梗本体及扭曲臂，所述扭曲臂的两端分别连接所述眼镜框与所述托叶梗本体，所述扭曲臂具有可调节的扭曲角度及尺寸，用于调整所述鼻托。
  11. 根据权利要求10所述的眼镜，其特征在于，所述扭曲角度包括斜角、前角和侧角中至少一个。
  12. 根据权利要求10所述的眼镜，其特征在于，所述鼻托还包括托叶，所述托叶梗与所述托叶间隙配合。
  13. 根据权利要求12所述的眼镜，其特征在于，所述托叶梗本体远离所述扭曲臂的一端设有托叶扣孔，所述托叶卡设于所述托叶扣孔内。
  14. 根据权利要求13所述的眼镜，其特征在于，所述托叶包括托桩及与所述托桩连接的叶片，所述托叶扣孔的入口端宽度小于所述托叶扣孔的孔内宽度，所述托桩卡设于所述托叶扣孔内，且所述托叶扣孔的入口端与所述托桩的侧壁之间具有活动间隙。
  15. 根据权利要求13所述的眼镜，其特征在于，所述托叶梗本体远离所述扭曲臂的一端设有与所述托叶扣孔相连通的切口；所述托叶通过所述切口进入所述托叶扣孔，并卡设于所述托叶扣孔内。
  16. 根据权利要求15所述的眼镜，其特征在于，所述托叶包括托桩及与所述托桩连接的叶片，所述托桩的宽度大于所述切口的宽度。
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