The relationship between head circumference and glasses size and its application in glasses design and matching

Abstract

The invention relates to a pair of glasses, and in particular to S1: acquiring face data and measuring head circumference data, wherein the head circumference data is acquired by taking the circumference from the glabella point as the starting point and passing through the back occipital point to the starting point, and establishing a database of the head circumference; S2: acquiring the temporal distance (inner width of temple) data of a frame, wherein the temporal distance data is acquired by the distance between the inner sides of two temples at 25 mm behind the lens plane when the temples are opened to the limit position, and establishing a database of the temporal distance; S3: acquiring lens length data, wherein the lens length is acquired by the horizontal distance from the leftmost end to the rightmost end of the lens in a box method, and establishing a database of the lens length; and S4: establishing face model data, wherein the face model data is established according to the database of the head circumference established in step S1, and step S2 establishes a database of the temporal distance and step S3 establishes a database of the lens length. According to the database of the head circumference established in step S1, appropriate matching is performed to form a comparison database of the head circumference, the temporal distance of glasses and the lens length; the comparison database of the head circumference, the temporal distance of glasses and the lens length is mainly divided into a comparison database of the head circumference, the temporal distance of glasses and the lens length for children and adults. By establishing the relationship between the temporal distance of glasses, lens length and head circumference, it will be easier for people to choose glasses that suit their head size.

Description

Technical Field

[0001] The present invention relates to glasses, and in particular to the application of the relationship between head circumference and glasses size in glasses design and matching. Background Art

[0002] The universal eyeglass sizes are the baseline method and the frame method. The frame method is currently the most commonly used eyeglass size marking method in China. Both methods include three size elements in the eyeglass structure: lens length, nose-to-nose distance between the two lenses, and temple length. However, these three sizes cannot accurately express the size of the glasses, nor can they be matched with different head sizes. Offline, we can still try on pairs of glasses one by one, but it still feels that the target is not very targeted, especially when buying glasses online. How can we quickly and conveniently choose glasses with the right tightness? Is there a more rational data that can give a clear guide on how to match glasses?

[0003] In view of the above-mentioned defects, the present invention makes improvements. Summary of the invention

[0004] In order to overcome the shortcomings of the background technology, the present invention provides an application of the relationship between head circumference and eyeglass size in eyeglass design and matching, thereby making the selection and matching of eyeglasses more convenient and better meeting actual needs.

[0005] The technical solution adopted by the present invention is:

[0006] The application of the relationship between head circumference and eyeglass size in eyeglass design and matching is characterized by: including:

[0007] S1: Acquire facial data and measure head circumference data. The head circumference data is acquired by taking the circumference from the glabella point as the starting point and passing through the occipital point to the starting point, and establishing a head circumference database;

[0008] S2: Acquire the data of the temporal distance of the glasses. The method for acquiring the data of the temporal distance of the glasses is to open the temples to the extreme position, and to obtain the inner distance between the two temples at 25 mm behind the lens plane, and to establish a database of the temporal distance;

[0009] S3: obtaining lens length data, wherein the lens length is obtained by the horizontal distance from the leftmost end to the rightmost end of the lens in the box method, and establishing a database of lens length;

[0010] S4: establishing face model data, the face model data is established according to the database of head circumference established in step S1, step S2 establishes a database of glasses temporal distance and step S3 establishes a database of lens length according to the data of head circumference established in step S1; performing appropriate matching to form a comparison database of head circumference, glasses temporal distance and lens length;

[0011] The head circumference, eyeglass temporal distance and lens length comparison database is mainly divided into two parts: the head circumference, eyeglass temporal distance and lens length comparison database for children and adults.

[0012] As the best option, based on the established database of head circumference, eyeglass temporal distance and lens length comparison, a conversion system is constructed using head circumference parameter sizes, eyeglass temporal distance and lens length to find the corresponding eyeglass temporal distance and lens length based on the measured customer head circumference size.

[0013] As the best option, the comparison database of children's head circumference and eyeglass temporal distance is divided into small-size, medium-size and large-size head circumference and eyeglass temporal distance, lens length comparison databases.

[0014] As the best option, the comparison database of head circumference and eyeglass temporal distance for adults is divided into comparison databases of head circumference and eyeglass temporal distance and lens length for adults in small size, medium size and large size.

[0015] As the best option, the basic value of the lens length data is set according to the head circumference size, and the positive and negative floating is adjusted according to the face shape relative to the forehead width. If the face is small, it is adjusted negatively, and if the face is large, it is adjusted positively.

[0016] As the best option, the lens length data is based on the statistics of lenses with 200-450 bends. The length of lenses with 600-800 bends is ≈ the length of lenses with 200 bends / cos(90-mirror angle / 2). Lenses with 600-800 bends only need to be calculated according to this formula, so the data is omitted.

[0017] In summary, the beneficial effects of the present invention are:

[0018] The most critical factor in determining whether the size of glasses is appropriate for a person is whether the width of the head is suitable (the depth is determined by the length of the temples, which can be designed in proportion and adjusted when trying on). Therefore, the temporal distance of the glasses is the most critical dimension for whether the glasses are suitable for the size of the head. The size of the head is expressed in terms of the size of the head circumference, which is simple and easy to operate. As long as the relationship between the head circumference size and the temporal distance of the glasses and the length of the lenses is established, it will be convenient for people to choose glasses that suit their head size. In particular, when buying glasses online, you only need to refer to the head circumference size, which brings great convenience to the purchase. We can also use the general correspondence between the temporal distance of the glasses, the length of the lenses and the head circumference to guide the design and teaching of glasses frames.

[0019] By marking the head circumference on various carriers such as the eyeglass lenses, temples, product labels, tags, product leaflets, web page descriptions, product titles, etc., the head circumference adaptation range can be relaxed by about ±1cm as appropriate, because the inner width of the temples can be adjusted to a limited extent. For example, it can be marked as "head circumference 560±10", "560±10" or "56±1cm".

[0020] It realizes automatic matching based on head circumference and glasses size data, without the need for manual operation by people with professional glasses knowledge, which can greatly improve efficiency and reduce labor costs.

[0021] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 is a general corresponding relationship diagram of head circumference and eyeglass size of the present invention;

[0024] Figure 2 is a schematic diagram of the temporal distance of glasses of the present invention;

[0025] Figure 3 It is a schematic diagram of the lens length and the mid-nose distance of the present invention;

[0026] Figure 4 Schematic diagram of the mirror angle of the present invention;

[0027] Figure 5 It is a schematic diagram of the head circumference size marked on the glasses lens and temples of the present invention;

[0028] Figure 6 This is a schematic diagram of the head circumference size of the present invention indicated on the product description page;

[0029] Figure 7 This is a schematic diagram of the head circumference size indicated in the product title of the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention Figure 1-7 , clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In order to make the purpose, technical solution and advantages of the implementation of the present invention clearer, the technical solution in the embodiment of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiment of the present invention.

[0032] Example

[0033] like Figure 1-7 As shown, the relationship between head circumference and eyeglass size disclosed in this embodiment is applied to eyeglass design, matching, and marking.

[0034] include:

[0035] S1: Acquire facial data and measure head circumference data. The head circumference data is acquired by taking the circumference from the glabella point as the starting point and passing through the occipital point to the starting point, and establishing a head circumference database;

[0036] S2: Acquire the data of the temporal distance of the glasses. The method for acquiring the data of the temporal distance of the glasses is to open the temples to the extreme position, and to obtain the inner distance between the two temples at 25 mm behind the lens plane, and to establish a database of the temporal distance;

[0037] S3: obtaining lens length data, wherein the lens length is obtained by the horizontal distance from the leftmost end to the rightmost end of the lens in the box method, and establishing a database of lens length;

[0038] S4: establishing face model data, the face model data is established according to the database of head circumference established in step S1, step S2 establishes a database of glasses temporal distance and step S3 establishes a database of lens length according to the data of head circumference established in step S1; performing appropriate matching to form a comparison database of head circumference, glasses temporal distance and lens length;

[0039] The head circumference, eyeglass temporal distance and lens length comparison database is mainly divided into two parts: the head circumference, eyeglass temporal distance and lens length comparison database for children and adults.

[0040] In the relationship between head circumference and eyeglass size established in this scheme:

[0041] 1. There is a strong relationship between the temporal distance of glasses and the size of head circumference, which determines the tightness and comfort level of glasses after fitting. By measuring the temporal distance of glasses, finding the corresponding head circumference data, and marking the head circumference that the glasses are suitable for, people can easily choose glasses of different sizes according to their head circumference.

[0042] Second, the length of the lens is secondary to the size of the head circumference. Generally speaking, the larger the head circumference, the longer the lens should be. The basic value of the lens length data is set according to the size of the head circumference, and the positive and negative floating is adjusted according to the size of the face relative to the forehead width. If the face is large, it is adjusted positively, and if the face is small, it is adjusted negatively. The size and shape of the lens determine the beauty of the match with the face shape. Figure 1 The lens length data is based on the statistics of lenses with 200 to 450 bends. Other lenses with 600 or 800 bends can be calculated based on this data. It should be noted that the curvature is related to the radius of the lens. The calculation method applicable to this solution is: curvature D = (n-1) / R, where n is the refractive index and R is the radius. Generally, the larger the curvature of the lens, the smaller the mirror angle when designing the eyeglass frame.

[0043] It should be pointed out that:

[0044] 1. Head circumference: The circumference from the eyebrow point to the starting point through the occipital point.

[0045] 2. Temporal distance of glasses: the distance between the inner sides of the two temples 25mm behind the lens plane when the temples are opened to the limit. Figure 2 .

[0046] 3. Lens length: The horizontal distance from the leftmost end to the rightmost end of the lens. Figure 3 .

[0047] 4. Mirror angle: The obtuse angle between the two lens planes. Figure 4

[0048] As the best option, based on the established head circumference and glasses temporal distance comparison database, a conversion system is constructed through the head circumference parameter size and glasses temporal distance, lens length, and the measured customer head circumference parameter size is converted into glasses temporal distance size.

[0049] The conversion system of this solution is simple and feasible. It adopts a matching data comparison table method to quickly select the required glasses. The algorithm is simple and the error rate is extremely low. The error can be greatly reduced through difference valuation, which can basically meet the current needs of consumers with different head circumferences to quickly screen out suitable glasses.

[0050] Specific reference Figure 1 The children's head circumference and glasses temporal distance comparison database is divided into children's small size, children's medium size, children's large size head circumference and glasses temporal distance, lens length comparison database.

[0051] As the best option, the comparison database of head circumference, temporal distance of glasses and lens length for adults is divided into small size for adults, medium size for adults and large size for adults.

[0052] The conversion system between head circumference and eyeglass temporal distance is: head circumference = 4.02*eyeglass temporal distance;

[0053] The conversion system for head circumference and lens length is: head circumference = 10.56 * lens length.

[0054] Technical personnel should note that: Although the present invention has been described according to the above specific implementation methods, the inventive concept of the present invention is not limited to this invention, and any modification using the inventive concept will be included in the scope of protection of this patent right.

Claims

1. The method for applying the relationship between head circumference and eyeglass size to eyeglass design and matching is characterized by: include: S1: Acquire facial data and measure head circumference data. The head circumference data is acquired by taking the circumference from the glabella point as the starting point and passing through the occipital point to the starting point, and establishing a head circumference database; S2: Acquire the data of the temporal distance of the glasses. The method for acquiring the data of the temporal distance of the glasses is to open the temples to the extreme position, and to obtain the inner distance between the two temples at 25 mm behind the lens plane, and to establish a database of the temporal distance; S3: obtaining lens length data, wherein the lens length is obtained by the horizontal distance from the leftmost end to the rightmost end of the lens in the box method, and establishing a database of lens length; S4: establishing face model data, the face model data is established according to the database of head circumference established in step S1, step S2 establishes the database of glasses temporal distance and step S3 establishes the database of lens length according to the data of head circumference established in step S1; performing appropriate matching to form a comparison database of head circumference, glasses temporal distance and lens length; the comparison database of head circumference, glasses temporal distance and lens length is mainly divided into two parts: children's and adults' comparison database of head circumference, glasses temporal distance and lens length; according to the established comparison database of head circumference, glasses temporal distance and lens length, a conversion system of head circumference parameter size, glasses temporal distance and lens length is constructed, and the glasses with corresponding temporal distance size and lens length are searched for by measuring the size of customer's head circumference; The conversion system between head circumference and eyeglasses temporal distance is: head circumference = 4.02 * eyeglasses temporal distance; the conversion system between head circumference and lens length is: head circumference = 10.56 * lens length; The head circumference, eyeglass temporal distance and lens length comparison database for children is divided into small, medium and large size databases for children; The comparison database of head circumference, temporal distance of glasses and lens length for adults is divided into small size, medium size and large size comparison databases of head circumference, temporal distance of glasses and lens length for adults; The lens length data is based on the statistics of lenses with 200-450 bends; 600-800 curved lens length ≈ 200 curved lens length / cos(90-mirror angle / 2); The difference between steps S2 and S3 will also be estimated; The matching data comparison table is used to quickly select the required glasses. The algorithm is simple and the error rate is extremely low. The error is reduced by difference valuation, which can meet the needs of consumers with different head circumferences to quickly screen out suitable glasses. By marking the head circumference that the glasses are suitable for, people can choose glasses of different sizes according to their head circumference.

2. The method for applying the relationship between head circumference and eyeglass size in eyeglass design and matching according to claim 1, characterized in that: The basic value of the lens length data is set according to the size of the head circumference, and the positive and negative floating value is adjusted according to the face shape relative to the forehead width. If the face is small, it is adjusted negatively, and if the face is large, it is adjusted positively.

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