KR102294822B1 - Eyeglasses manufacturing body data measuring device using stereo vision - Google Patents

Abstract

The present invention relates to an apparatus for measuring human body data for manufacturing eyeglasses of a subject, a spectacle frame in which nose pads are formed on both sides of the center of the rear and a reference point is formed on one side of the front corresponding to the center of the subject's nose; A body including temples extending rearwardly from both ends of the frame, and disposed at the same height as the reference point among the front of one side of the body, and disposed at an inclination toward the inside of the body, the first to photograph both eyes of the subject The camera and the first camera are disposed in front of the other side of the main body symmetrical to the front side of the main body, are arranged to be inclined to the inner rear of the main body, and are installed on one side of the second camera and the first camera for photographing both eyes of the subject, the subject A first light source irradiating light to both eyes of a second light source installed on one side of the second camera and irradiating light to both eyes of the subject, and a video image taken from the first camera and the second camera An angle formed by the first camera and the second camera and the center of the eyeball of any one of both eyes is detected, and using the detected angle and a known value of the reference point, a Left Pupillary Distance (LPD, Left Pupillary) for making glasses for the subject. Distance), a right eye distance (RPD, Right Pupillary Distance), an optical center point height (OH, Optical Height), and a vertex distance (VD, Vertex Distance) comprising a controller for calculating the human body data.
According to the present invention as described above, by using the position of the reference point, which is a known value, it is possible to more easily and accurately measure the human body data of the subject to which the glasses wearing position and wearing habit according to the shape of the subject's nose are applied. It is possible to provide glasses that are more suitable for
In addition, by utilizing the known value of the reference point, it is possible to more easily and accurately measure the human body data for making eyeglasses of the subject with a simple trigonometric function.

Description

Eyeglasses manufacturing body data measuring device using stereo vision

The present invention relates to an apparatus for measuring human body data for manufacturing glasses using stereo vision, and more particularly, to more easily and accurately measuring the human body data of a subject to which the position of wearing glasses according to the shape of the subject's nose and the habit of wearing glasses are applied. It relates to an apparatus for measuring human body data for manufacturing glasses using stereo vision that can be measured.

In general, in order to precisely manufacture spectacle lenses, especially special spectacle lenses such as progressive lenses or progressive multifocal lenses, the distance or near gaze position or orientation, both pupil distance, facial facial structure, reading habits, pupil rotation angle, facial tilt It is necessary to consider the physical characteristics and viewing habits of the person who is going to wear glasses (measurement target). These considerations are called “parameters for making spectacle lenses”, which parameters for making spectacle lenses include, for example, Infinite Distance Binocular Pupil Distance, Infinite Distance Binocular Pupil Distance ( Infinite Distance Monocular Pupil Distance, Near Distance Binocular Pupil Distance, Near Distance Monocular Pupil Distance, vertical distance and horizontal distance (u/v) from the center of the eyeglass frame to the center of the pupil , the horizontal distance of the eyeglass frame lens insertion unit (BOX A), the vertical distance of the eyeglass frame lens insertion unit (BOX B), the longest distance from the center point of the frame to the eyeglass frame lens insertion unit (BOX ED), the horizontal distance between the left and right eyeglass frame lens insertion units (DBL) ), the vertical distance from the center of the pupil to the lower spectacle frame lens insertion part (Eye point), the face tilting angle of the subject wearing glasses, and the vertical line perpendicular to the lateral reference horizontal plane of the subject wearing glasses. and the angle formed with the side line of the spectacle lens (Pantoscopic Tilt), the distance from the lateral reference corneal vertex of the subject wearing glasses to the optical center point of the spectacle lens (Vertex Cornea Distance), from the center of the spectacle frame when wearing glasses to the left side toward the face of the subject Or the angle between the virtual line to the left or right longest distance of the spectacle lens bent to the right and the virtual line horizontally extending to the left or right from the center of the frame (Face Form Angle), and the face rotation angle of the subject wearing glasses (Face Rotation Angle) and the like, but is not limited thereto.

The parameters for manufacturing spectacle lenses should be accurately measured and applied to spectacle lenses when manufacturing not only general spectacle lenses but also special spectacle lenses such as progressive lenses or progressive multi-focal lenses. In this regard, Korean Patent Application Laid-Open No. 10-2004-0030594 discloses that, in a spectacle lens design method considering eye movement (listing side), eye movement (listing side) is considered in order to easily obtain high-performance spectacle lenses. As a spectacle lens design method, the visual acuity evaluation function (log MAR) generally derived from the measured visual acuity V is used as an evaluation function regarding the visual acuity constituting the advantage function used in the optimization calculation, and in this case, the field curvature is used. When the aberration of a normal spectacle lens is taken and the residual astigmatism is defined as the astigmatism extended by the spectacle lens design considering the listing side, the visual acuity evaluation function (log MAR) is expressed by the following equation (1) ( Visual acuity evaluation function (log MAR) = log 10 (1/V (field curvature, residual astigmatism))) (1) A spectacle lens design method and spectacle lens are disclosed. In addition, Korean Patent Application Laid-Open No. 10-2009-0066296 discloses an apparatus and method for determining one or more components of a direction of a corrective spectacle lens for a future wearer in a wearing state, and identifies a position on a frame or a display lens installed in the frame. installing a system, the system comprising: one or more identification elements having one or more known geometric characteristics; two-dimensionally capturing an image of the vertical element in a vertical facial plane; processing the captured image to measure a captured geometric characteristic of the image of the identification element that is dependent on the known geometric characteristic of the identification element; and comparing the captured geometrical feature with the known geometrical feature, and calculating one or more components of a direction of the lens.

However, since the above prior art employs a complex equation or algorithm for measuring parameters for manufacturing spectacle lenses, the manufacturing process of the device for implementing this is very complicated, and the size of the device is required. In addition, the above prior art has a problem in that only one or a few parameters for manufacturing spectacle lenses can be measured, and various and numerous parameters for manufacturing spectacle lenses cannot be simultaneously measured. Furthermore, the above prior arts do not consider the intrinsic physical characteristics or viewing habits of the subject to be measured. Therefore, in comparison with the prior art, a method for measuring parameters for manufacturing spectacle lenses that can be implemented more accurately and easily, and can be implemented in a compact and portable manner, and measurement for implementing the same by reflecting the physical characteristics or viewing habits of the subject to be measured The device is in demand.

Korean Patent Publication No. 2004-0030594 Korean Patent Publication No. 2009-0066296

The present invention has been devised to solve the above problems, and an object of the present invention is to utilize the position of a reference point, which is a known value, to obtain the human body data of the subject to which the glasses wearing position and wearing habits are applied according to the shape of the subject's nose. An object of the present invention is to provide an apparatus for measuring human body data for manufacturing eyeglasses using stereo vision that allows for easier and more accurate measurement.

According to the present invention for achieving the above object, in the apparatus for measuring human body data for making eyeglasses of a subject, nose pads are formed on both sides of the center of the rear and a reference point is formed on one side of the front corresponding to the center of the nose of the subject A body including a spectacle frame which becomes a spectacle frame, and temples extending rearwardly from both ends of the spectacle frame, and disposed at the same height as the reference point among the front of one side of the body, and arranged to be inclined toward the inside of the body and rearward, the subject A first camera for photographing both eyes of a second camera and a second camera for photographing both eyes of the subject and disposed in front of the other side surface of the main body symmetrical to the first camera, inclined to the inner rear of the main body, and the first camera A first light source installed on one side and irradiating light to both eyes of the subject and a second light source installed on one side of the second camera and irradiating light to both eyes of the subject, and the first camera and the second camera Detects the angle formed by the center of the eyeball of any one of the first camera and the second camera and both eyes from the video image taken from Includes a control unit that calculates human body data including Left Pupillary Distance (LPD), Right Pupillary Distance (RPD), Optical Center Height (OH, Optical Height) and Vertex Distance (VD, Vertex Distance) An apparatus for measuring human body data for manufacturing glasses using stereo vision is provided.

Here, it is formed on one side of the glasses frame, characterized in that it further comprises a display for visually displaying the calculated human body data.

According to the present invention as described above, by using the position of the reference point, which is a known value, it is possible to more easily and accurately measure the human body data of the subject to which the glasses wearing position and wearing habits are applied according to the shape of the subject's nose. It is possible to provide glasses that are more suitable for

In addition, by utilizing the known value of the reference point, it is possible to more easily and accurately measure the human body data for making eyeglasses of the subject with a simple trigonometric function.

1 is a schematic perspective view of an apparatus for measuring human body data for manufacturing glasses using stereo vision according to an embodiment of the present invention;
2 is a schematic plan view of an apparatus for measuring human body data for manufacturing glasses using stereo vision according to an embodiment of the present invention;
3 is a schematic side view of an apparatus for measuring human body data for manufacturing glasses using stereo vision according to an embodiment of the present invention;
4 is a view for explaining a process of calculating a monocular distance (MPD) through the control unit of the present invention.
5 is a view for explaining a process of calculating an optical center point height (OH: Optical Height) through the control unit of the present invention.
6 is a view for explaining a process of calculating the distance between vertices (VD: Vertex Distance) through the control unit of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings. It should be noted that the same components in the drawings are denoted by the same reference numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted.

1 is a schematic perspective view of an apparatus for measuring human body data for manufacturing glasses using stereo vision according to an embodiment of the present invention, and FIG. 2 is an apparatus for measuring human body data for manufacturing glasses using stereo vision according to an embodiment of the present invention. 3 is a schematic side view of an apparatus for measuring human body data for manufacturing glasses using stereo vision according to an embodiment of the present invention.

1 to 3 , in the apparatus 1 for measuring human body data for manufacturing glasses using stereo vision according to an embodiment of the present invention, the glasses wearing position and wearing habits are determined according to the shape of the nose of the subject who wears the glasses. The body 10, the first camera 20, the second camera 30, the first light source 40, the second light source 50 and the control unit 60 ) is included.

Here, the human body data for manufacturing glasses includes a left eye distance (LPD, Left Pupillary Distance), a right eye distance (RPD, Right Pupillary Distance), an optical center point height (OH, Optical Height), and a vertex distance (VD, Vertex Distance). .

Left Pupillary Distance (LPD) and Right Pupillary Distance (RPD) are used to determine the horizontal position of the optical center of the lens to indicate the distance from the center of the subject's nose to the center of the left and right eyes.

The optical center point height (OH, Optical Height) indicates the distance from the bottom of the lens to the center of the left or right eye and is used to determine the vertical position of the optical center of the lens.

Vertex Distance (VD) indicates the distance from the posterior vertex of the lens to the corneal surface of the left or right eye, and is used to determine the corrective refractive power of the lens.

The body 10 is worn by an examinee who is an object of measurement of human body data required for manufacturing glasses, and includes a spectacle frame 11 , a temple 12 and an installation frame 13 .

The spectacle frame 11 has nose pads 11a formed on both sides of the rear center, and a reference point 11b is displayed on one side of the front center corresponding to the center of the subject's nose.

In addition, a display 11c for visually displaying the calculated human body data is further formed on the upper front portion of the glasses frame 11 .

The temple 12 is formed to extend backward from both ends of the spectacle frame 11 , and the extended ends are supported by both ears of the examinee to fix the position of the spectacle frame 11 .

The installation frame 13 is formed to extend forward from both ends of the spectacle frame 11, and provides installation areas for the first camera 20 and the second camera 30 to be described later through the extended ends.

The first camera 20 is disposed in front of one side of the main body 10 through any one of the installation frames 13, is inclined to the inner rear of the main body 10, and captures the video image taken by photographing both eyes of the subject. It is provided to the control unit 60 to be described later.

The second camera 30 is disposed in front of the other side of the main body 10 that is symmetrical with the first camera 20 through the other installation frame 13, and is slanted to the inside of the body 10 and rearward of the subject. Both eyes are photographed and the captured video image is provided to the controller 60 to be described later.

Here, as the first camera 20 and the second camera 30 , any one selected from an RGB camera or an IR (Infra-red) camera may be used.

The first light source 40 is installed on one side of the first camera 20, and irradiates light to both eyes of the examinee to form an image at the apex of the cornea positioned in a straight line with each eye center (EC) of the examinee. It serves to display the light reference point (41).

The second light source 50 is installed on one side of the second camera 30, and irradiates light to both eyes of the examinee to form an image at the apex of the cornea positioned in a straight line with each eye center (EC) of the examinee to form a second It serves to display the light reference point (51).

On the other hand, the first optical reference point 41 and the second optical reference point 51, as shown in FIG. A first imaginary line (b) connecting the first camera 20 and the center of the eyeball (EC) with respect to the first reference line (a) connecting the first camera 20 and the second camera 30 in a triangle connecting the ) and the second camera 30 and the second virtual line c connecting the center of the eyeball EC provide a reference position for calculating the angles (α, β) formed.

In addition, as shown in FIG. 3 , the first optical reference point 41 and the second optical reference point 51 are a second reference line connecting the first camera 20 or the second camera 30 and the reference point 11b. A reference position for calculating the angle γ formed by the third virtual line d connecting the first camera 20 or the second camera 30 and the eye center EC with respect to (P) is provided.

Here, as the first light source 40 and the second light source 50 , any one selected from an RGB LED light source or an IR LED light source may be used.

The control unit 60 is formed by the first camera 20 and the second camera 30 from the video images taken from the first camera 20 and the second camera 30 and the center of the eyeball EC of any one of both eyes. Detecting the angle (α, β, γ), and using the detected angle and the known value of the reference point 11b, Left Pupillary Distance (LPD, Left Pupillary Distance), Right Pupillary Distance (RPD) for making glasses for the subject ), the optical center point height (OH, Optical Height), and the vertex distance (VD, Vertex Distance) are calculated.

As described above, the human body data measuring device 1 for manufacturing glasses using stereo vision according to an embodiment of the present invention measures the human body data of a subject while wearing the glasses-type measuring device. It is possible to measure more accurate human body data to which the position of wearing glasses and the habit of wearing glasses according to the shape of the subject's nose are applied.

Accordingly, it is possible to reliably manufacture eyeglasses more suitable for the eye and human body of the subject.

Hereinafter, with reference to the drawings, the left eye distance (LPD, Left Pupillary Distance), the right eye distance (RPD, Right Pupillary Distance), the optical center point height (OH, Optical Height) and between the vertices for manufacturing the subject's glasses through the controller 60 with reference to the drawings A process of calculating the distance (VD, Vertex Distance) will be described in more detail.

4 is a view for explaining a process of calculating a monocular pupillary distance (MPD) through the control unit of the present invention.

Referring to the process of calculating the Right Pupillary Distance (RPD) among the monocular distances through the controller 60 of the present invention with reference to FIG. 4 , first, the first camera 20 and the second camera 30 are connected. A first imaginary line (b) connecting the first reference line (a), the first camera 20 and the center of the right eye (REC), and a second imaginary line (b) connecting the second camera 30 and the center of the right eye (REC) c) to form a triangle consisting of

At this time, the length of the first reference line (a) is a known value that is a design value of the measuring device, and the angle (α) formed by the first virtual line (b) with respect to the first reference line (a) and the first reference line (a) The angle β formed by the second virtual line c with respect to ? is a known value calculated in advance using the first optical reference point 41 and the second optical reference point 51 .

Next, a vertical line h orthogonal to the first reference line a is formed from the right eye center REC.

Then, the distance (x) from the first camera 20 to the water line is calculated using Equation 1 below.

<Equation 1>

Finally, using the calculated x value, the right eye distance (RPD) is calculated using Equation 2 below.

<Equation 2>

On the other hand, the left eye distance (LPD) can be calculated by applying the same method as above for the left eye, and the pupillary distance (PD) can be calculated by adding the calculated left eye distance (LPD) and right eye distance (RPD). have.

Then, the length of the first vertical line (h) is calculated through Equation 3 below to be used as a known value when calculating the distance between the optical center point (OH) and the vertex distance (VD: Vertex Distance), which will be described later. .

<Equation 3>

5 is a view for explaining a process of calculating an optical center point height (OH: Optical Height) through the control unit of the present invention.

Referring to the process of calculating the optical center point height (OH: Optical Height) for the right eye through the control unit 60 of the present invention with reference to FIG. 5, the first camera 20 and the right eye center ( The first vertical line h extending to REC) is a known value calculated in FIG. 4 above.

First, a third imaginary line (h') connected perpendicularly to the first vertical line (h) is formed at the right eye center (REC), and a third imaginary line ( d) to form a triangle.

Here, the angle γ formed by the third virtual line d with respect to the first vertical line h is a known value calculated using the first optical reference point 41 .

Then, the length of the second vertical line h' is calculated using Equation 4 below.

<Equation 4>

Finally, assuming that the lens LE is installed in the spectacle frame 11, the distance H from the reference point 11b, which is a known value when designing the measuring device to the lower end of the lens LE, is the first calculated through Equation 4 2 By subtracting the length of the vertical line h', the optical center point height (OH), which is the distance from the lower end of the lens LE to the right eye center REC, can be calculated.

Meanwhile, the optical center point height (OH) for the left eye may be calculated by applying the same method as above to the left eye using the second camera 30 .

6 is a diagram for explaining a process of calculating a distance between vertices (VD: Vertex Distance) through the control unit of the present invention.

Referring to the process of calculating the vertex distance (VD: Vertex Distance) for the right eye through the controller 60 of the present invention with reference to FIG. 6 , the first camera 20 and the right eye center ( The first vertical line h extending to REC) is a known value calculated in FIG. 4 above.

And, the distance Q from the second reference line P connecting the first camera 20 and the reference point 11b and the reference point 11b to the rear vertex of the lens LE is a known value at the time of designing the measurement device, If the diameter (D) of the eyeball, which is usually 25 mm, is used as a known value, the distance between vertices (VD: Vertex Distance) can be calculated using Equation 5 below.

<Equation 5>

Meanwhile, a vertex distance (VD) for the left eye may also be calculated by applying the same method as above to the left eye using the second camera 30 .

As described above, the apparatus for measuring human body data for glasses manufacturing using stereo vision according to an embodiment of the present invention utilizes a known value of a reference point, so that the human body data for glasses manufacturing of a subject can be measured more easily and accurately with a simple trigonometric function. can

Although the present invention has been described with reference to the above preferred embodiments, various modifications and variations are possible without departing from the spirit and scope of the invention. Accordingly, the appended claims are intended to cover such modifications and variations as fall within the subject matter of the present invention.

1: Human body data measuring device for glasses production using stereo vision
10: body 11: glasses frame
11a: nose rest 11b: reference point
11c: display
12: temple 13: installation frame
20: first camera 30: second camera
40: first light source 41: first light reference point
50: second light source 51: second light reference point
60: control unit

Claims (2)

In the apparatus for measuring the human body data for the manufacture of glasses of the subject,
A spectacle frame having nose pads formed on both sides of the rear center and having a reference point formed on one front side corresponding to the center of the nose of the subject, temples extending rearward from both ends of the spectacle frame, and both sides of the spectacle frame a body including a pair of installation frames extending forward from the end;
a first camera installed at the extended end of any one of the installation frames, disposed at the same height as the reference point, inclined toward the inside of the body, and photographing both eyes of the subject;
a second camera installed at the extended end of the other installation frame symmetrical to the first camera, disposed at an angle to the inside of the main body and rearward, and photographing both eyes of the subject;
a first light source installed on one side of the first camera and irradiating light to both eyes of the subject;
a second light source installed on one side of the second camera and irradiating light to both eyes of the subject;
From the video images taken from the first camera and the second camera, an angle between the first camera and the second camera and the center of any one of both eyes is detected, and a known value of the detected angle and the reference point is obtained. Using the left eye distance (LPD, Left Pupillary Distance), Right Pupillary Distance (RPD, Right Pupillary Distance), optical center point height (OH, Optical Height) and vertex distance (VD, Vertex Distance) for the production of glasses of the subject using An apparatus for measuring human body data for manufacturing glasses using stereo vision, characterized in that it comprises a control unit for calculating human body data. The method of claim 1,
An apparatus for measuring human body data for manufacturing glasses using stereo vision, characterized in that it further comprises a display formed on one side of the glasses frame and visually displaying the calculated human body data.

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