JP2015049379A - Independent type measurement assist device and noncontact type measurement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily, inexpensively and highly accurately calibrate a captured image for a measurement when measuring parameters for spectacles, while reducing a burden of a subject as much as possible.SOLUTION: An independent type measurement assist device 1 as an assist device for measuring parameters for spectacles is used when measuring parameters for spectacles of a subject wearing a spectacle frame F. The independent type measurement assist device 1 includes: a measurement reference part 2 that includes an imaging object surface O imaged along with the face of the subject in a state of wearing the spectacle frame F, for measuring the parameters for spectacles, and a measurement reference scale S having a prescribed size, on the imaging object surface O; and a pedestal part 3 that is configured to, when the measurement reference part 2 is held, freely fix the measurement reference scale S in such an arrangement that the measurement reference scale S in the measurement reference part 2 and at least one of the spectacle frame F and the subject's face have a prescribed physical relationship, while being mutually in noncontact with each other.

Description

  The present invention relates to a self-supporting measurement auxiliary tool and a non-contact measurement method used when measuring spectacle wearing parameters.

  In general, the production of spectacle lenses requires spectacle wearing parameters measured by a spectacle wearer wearing a spectacle frame. The spectacle wearing parameters include a corneal vertex distance, a frame forward tilt angle, a fitting point position, a pupil distance, a frame warp angle, and the like.

  The measurement of the spectacle wearing parameters is performed using, for example, a dedicated spectacle wearing parameter measuring device. As the spectacle wearing parameter measurement device, after positioning the face of the spectacle wearer who is the subject, the face side and front of the subject are imaged, based on the image that is the imaging result, There is one configured to calculate and obtain various spectacle wearing parameters (for example, see Patent Document 1).

  On the other hand, there is also a method for obtaining various spectacle wearing parameters using a scale auxiliary tool by a relatively simple method without using the spectacle wearing parameter measuring apparatus. For example, there is a technique of providing a measurement reference scale or the like on a spectacle frame. Hereinafter, the prior art will be described.

  For example, in Patent Literature 2, a face side image of a subject wearing spectacles in which a scale auxiliary tool with a scale of a predetermined dimension is attached to a spectacle frame is obtained as image data, and the photographed subject's image is obtained. A method is described in which the corneal apex is obtained and the actual distance from the subject's corneal apex to the inside of the frame of the spectacle frame is calculated based on the scale assisting tool.

  Further, Patent Document 3 describes that a scale seal as an index to be marked on the spectacles is attached to the spectacle frame. Further, in Patent Document 3, the imaging unit images the face portion of the subject from a position deviating from the directly facing position with the subject, and the analysis unit narrows the interval between the marked seals. It is described that the tilt of the face of the subject T is corrected based on the above.

Japanese Patent No. 5013930 Japanese Patent No. 3976925 Japanese Patent No. 4536329

  Among the methods described above, the method described in Patent Document 1 can surely measure the spectacle wearing parameters with high accuracy. On the other hand, the dedicated spectacle wearing parameter measuring device itself becomes a large-scale one. More specifically, the spectacle wearing parameter measuring apparatus has a configuration in which an imaging means can move around a subject around the subject after the subject is seated. In this way, the face side and front face of the subject are imaged. For this reason, the apparatus is naturally large, and the price of the apparatus is difficult to say. Then, not all eyeglass stores can purchase the device.

  On the other hand, in the methods described in Patent Documents 2 and 3, a subject who wears a spectacle frame by attaching a scale auxiliary tool or a scale seal (hereinafter, representatively, the scale auxiliary tool is taken as an example) to the spectacle frame. Can be taken. Therefore, the spectacle wearing parameters can be obtained relatively easily and inexpensively.

  The methods described in Patent Documents 2 and 3 are useful in that the spectacle wearing parameters can be obtained relatively easily and inexpensively, although there is anxiety in terms of accuracy compared to the method described in Patent Document 1. . By doing so, spectacle wearing parameters can be obtained in many spectacle stores, the spectacle wearing parameters can be reflected in the spectacle lens, and the spectacle lens performance required when the subject wears spectacles. It is because it can pull out.

  However, when the present inventors examined the methods described in Patent Documents 2 and 3, the following problems were highlighted.

(Problem 1)
By attaching the scale assisting tool to the spectacle frame, the spectacle frame is scratched or affixed (hereinafter referred to as “scratch” as a representative).
In order to reproduce the wearing state of the eyeglasses as faithfully as possible, the subject usually wears the eyeglass frame to be purchased (eyeglass frame without eyeglass lenses) and starts imaging. Therefore, a scale auxiliary tool must be attached to the spectacle frame to be purchased. At that time, if the spectacle frame is damaged due to the attachment of the scale assisting tool, the subject finally purchases spectacles in which the spectacle lens is fitted in the spectacle frame with the scratch.

(Problem 2)
By attaching the scale assisting tool to the spectacle frame, the possibility that the scale assisting tool comes into contact with the face of the subject increases.
In such a case, the subject may feel uncomfortable, and even if the scale auxiliary tool does not come into contact with the face of the subject, the subject is forced to be tense. Above all, hygiene problems may occur when other subjects are using scale aids. In this case, the scale auxiliary tool must be sterilized for each measurement, which increases the burden on the spectacle store.

  In addition, the present inventors have found that there is a problem caused by using a scale auxiliary tool with respect to measurement accuracy. That is the following problem.

(Problem 3)
When the scale assisting tool is attached to the spectacle frame, the spectacle frame falls down due to the weight of the scale assisting tool itself as compared with the normal wearing state.
In order to improve the measurement accuracy, the wearing state of the glasses must be reproduced as faithfully as possible. Nevertheless, if the measurement is performed with the spectacle frame sliding down, it is naturally difficult to accurately obtain the spectacle wearing parameters.

(Problem 4)
When the scale assisting tool is attached to the spectacle frame, blurring occurs during imaging due to the movement of the face of the subject.
As described above, when taking an image, the subject must wear a spectacle frame. In addition, the subject is forced to stand still. Even if forced to be stationary, it is impossible to completely stop the movement of the face. That is, the spectacle frame and the scale auxiliary tool that are worn also move with the movement of the face. In such a case, even if the scale auxiliary tool is imaged, blurring occurs, and accuracy is reduced when the spectacle wearing parameters are calculated from the captured image.

Even when the scale assisting tool is attached to the spectacle frame, before the present inventors have found the above problem, in the conventional method as described in Patent Documents 2 and 3, in terms of accuracy. There is no literature that raised the problem. The reason for this is that it was considered sufficient for the corneal apex distance, the forward tilt angle, and the like to be calculated to some extent and reflected in the glasses.
However, the present inventors have found that the accuracy of spectacle wearing parameters such as the distance between corneal vertices determines whether or not the performance of the spectacle lens is sufficiently brought out.

  Therefore, the present invention, when measuring spectacle wearing parameters, performs calibration related to a captured image for the measurement with ease, low cost, and high accuracy while reducing the burden on the subject as much as possible. It is an object of the present invention to provide a self-supporting measuring aid and a non-contact measuring method that can be realized.

  In order to solve the above problems, the present inventors have repeatedly studied. And it was thought that all the above problems could be solved by adopting a configuration in which the scale auxiliary tool is not attached to the spectacle frame and does not interlock with the movement of the subject's face. As a result, the inventors have come up with a technique of making the scale assisting tool as it stands in the prior art and making the scale assisting tool non-contact with the subject.

Aspects of the present invention based on the above findings are as follows.
The first aspect of the present invention is:
An instrument for measuring spectacle wearing parameters used when measuring spectacle wearing parameters of a subject wearing a spectacle frame,
A measurement reference unit having an image pickup surface imaged together with the face of the subject wearing the eyeglass frame for measurement of spectacle wearing parameters, and having a measurement reference scale of a predetermined size on the image pickup surface;
Arrangement so that the measurement reference scale in the measurement reference part and at least one of the spectacle frame and the face of the subject have a predetermined positional relationship in a non-contact state by holding the measurement reference part A pedestal having a configuration that allows the measurement reference scale to be fixed freely;
This is a self-supporting measuring aid having

According to a second aspect of the present invention, in the self-supporting measuring aid according to the first aspect,
The measurement standard part is
A measurement scale member having the measurement scale;
A bridge member connecting between the measurement reference scale member and the pedestal portion;
Have
The pedestal is arranged so that the measurement reference scale member and at least one of the spectacle frame and the face of the subject are in a predetermined positional relationship in a non-contact state by holding the bridge member The measurement reference scale member can be fixed freely,
The metric scale member is
A first scale member disposed in a predetermined relationship with at least one of the eyeglass frame or the subject's face;
A second scale member formed with the measurement reference scale;
A connecting member that connects the first scale member and the second scale member so that the relative position of the second scale member to the first scale member is movable;
Have

According to a third aspect of the present invention, in the self-supporting measuring aid according to the second aspect,
The relative position includes a position where the imaged surface of the second scale member is imaged together with the face side of the subject and a position where the imaged surface of the second scale member is imaged together with the face front of the subject. And are included.

According to a fourth aspect of the present invention, in the self-supporting measurement auxiliary tool according to the second or third aspect,
The first scale member and the second scale member are formed in a plate shape,
The connecting member is configured by a hinge mechanism that enables the first scale member and the second scale member to rotate within a predetermined angle range.

According to a fifth aspect of the present invention, in the self-supporting measuring aid according to any one of the second to fourth aspects,
The measurement reference scale member and the bridge member are freely engageable.

According to a sixth aspect of the present invention, in the self-supporting measuring aid according to any one of the first to fifth aspects,
The spectacle wearing parameters include
The distance between the corneal apexes in the state where the subject wears the spectacle frame,
At least one of the fitting point position and the interpupillary distance in the state,
Is included.

A seventh aspect of the present invention is the self-supporting measuring aid according to any one of the first to sixth aspects,
The predetermined positional relationship is an arrangement in which at least one side of the measurement reference scale is parallel to the temple of the spectacle frame, or an arrangement in which the one side is parallel to the datum line of the spectacle frame. is there.

The eighth aspect of the present invention is
A method for measuring spectacle wearing parameters of a subject wearing a spectacle frame,
A measurement reference unit having an image pickup surface imaged together with the face of the subject wearing the eyeglass frame for measurement of spectacle wearing parameters, and having a measurement reference scale of a predetermined size on the image pickup surface;
Arrangement so that the measurement reference scale in the measurement reference part and at least one of the spectacle frame and the face of the subject have a predetermined positional relationship in a non-contact state by holding the measurement reference part A pedestal having a configuration that allows the measurement reference scale to be fixed freely;
Prepare a self-supporting measuring aid with
With respect to at least one of the spectacle frame and the face of the subject in a state where the subject and the self-supporting measurement aid are in non-contact and the spectacle frame and the self-supporting measurement aid are in non-contact. The self-supporting measuring aid is arranged so as to have a predetermined positional relationship,
The imaged surface is positioned so as to be imaged together with the subject's face side or face front, and the size of the imaged result is based on the measurement reference scale on the imaged surface included in the imaged result obtained in that state. This is a non-contact measurement method for performing calibration.

According to a ninth aspect of the present invention, in the non-contact measurement method according to the eighth aspect,
The measurement standard part is
A measurement scale member having the measurement scale;
A bridge member connecting between the measurement reference scale member and the pedestal portion;
Have
The pedestal is arranged so that the measurement reference scale and at least one of the spectacle frame and the face of the subject are in a predetermined positional relationship in a non-contact state by holding the bridge member. The measurement reference scale has a configuration that can be freely fixed,
The metric scale member is
A first scale member disposed in a predetermined relationship with at least one of the eyeglass frame or the subject's face;
A second scale member formed with the measurement reference scale;
A connecting member that connects the first scale member and the second scale member so that the relative position of the second scale member to the first scale member is movable;
Have
The first scale member and the second scale member are connected via a connecting member so that the relative position of the second scale member with respect to the first scale member is movable, and the second scale member has a cover. The measurement reference scale is formed on the imaging surface,
Arranging the first scale member in the self-supporting measuring auxiliary tool at a predetermined relationship with at least one of the spectacle frame or the face of the subject;
The second scale member connected to the first scale member is positioned so that the imaged surface is imaged together with either the face side or the face front of the subject, and is included in the imaging result obtained in that state Calibrate the dimensions of the imaging result based on the measurement reference scale on the imaged surface,
The second scale member is moved by moving a relative position of the second scale member with respect to the first scale member while maintaining a positional relationship between the first scale member and at least one of the eyeglass frame or the face of the subject. Is positioned so as to be imaged together with either the face side surface or the face front, and dimensional calibration of the imaging result based on the measurement reference scale on the imaging surface included in the imaging result obtained in that state Perform

  According to the present invention, when measuring spectacle wearing parameters, calibration relating to a captured image for the measurement can be performed simply, at low cost and with high accuracy while reducing the burden on the subject as much as possible. It becomes possible.

It is a schematic side view of the self-supporting measurement auxiliary tool in the present embodiment. It is explanatory drawing which shows the structural example of the spectacles wearing parameter in this embodiment. (A) shows the intercorneal vertex distance, and (b) shows the interpupillary distance. It is explanatory drawing which shows the structural example of the measurement reference | standard scale member in this embodiment. (A) shows the state which folded the 1st scale member and the 2nd scale member, (b) shows the state which opened the 1st scale member and the 2nd scale member. It is explanatory drawing which shows the usage example of the bridge member in this embodiment. It is a schematic plan view of the self-supporting measurement auxiliary tool in the present embodiment. It is the flowchart which showed the procedure of the non-contact-type measuring method in this embodiment. It is explanatory drawing which shows a specific example of the usage condition of the self-supporting measuring aid in this embodiment. (A) shows the state of the first imaging step (face side), and (b) shows the state of the second imaging step (face front). It is the schematic of the measurement auxiliary tool in another aspect.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Here, description will be made with the following categories.
1. Self-supporting measuring aid 1-A) Outline of self-supporting measuring aid 1-B) Specific examples of spectacle wearing parameters 1-C) Specific examples of measurement reference scale 1-D) Measurement reference section 1-D-a ) Measurement reference scale member 1-Db) Bridge member 1-E) Pedestal part 2. Measurement scale member 2-A) First scale member 2-B) Second scale member 2-C) Connecting member Non-contact measurement method 3-A) Preparation step 3-B) First imaging step (face side)
3-C) First calibration step (face side)
3-D) Second imaging step (front face)
3-E) Second calibration step (front face)
4). 4. Effects of the embodiment Modifications etc. Note that for configurations not described below, configurations described in known documents may be adopted.

<1. Self-supporting measuring aid 1>
1-A) Outline of Self-supporting Measuring Aid 1 The basic configuration of the self-supporting measuring aid 1 in this embodiment will be described with reference to FIG. FIG. 1 is a schematic view of a self-supporting measuring aid 1 according to this embodiment.

The self-supporting measurement auxiliary tool 1 in the present embodiment mainly has the following configuration.
A measurement reference unit 2 having an imaged surface O that is imaged together with the face of the subject wearing a spectacle frame for measurement of spectacle wearing parameters, and having a measurement reference scale S of a predetermined size on the imaged surface O.
By holding the measurement reference unit 2, the measurement reference scale S is arranged in such a manner that the measurement reference scale S and at least one of the spectacle frame and the subject's face are in a predetermined non-contact state with each other. Pedestal part 3 having a structure that can be fixed freely
With the above configuration, it is possible to easily and accurately measure the spectacle wearing parameters while keeping the measurement reference scale S in contact with the subject.

  Hereinafter, the “glasses wearing parameter” to be measured and the “measurement reference scale S” used as a reference for performing calibration at the time of measuring the glasses wearing parameter will be described. Then, each structure in the self-supporting measurement auxiliary tool 1 will be described in detail.

1-B) Specific examples of spectacle wearing parameters Here, the spectacle wearing parameters measured in the present embodiment will be described.
FIG. 2 is an explanatory diagram showing a specific example of the spectacle wearing parameters. (A) shows the intercorneal vertex distance, and (b) shows the interpupillary distance.

  The spectacle wearing parameters measured in the present embodiment include the corneal vertex distance, the forward frame tilt angle, the fitting point position, and the interpupillary distance when the subject wears the spectacle frame F.

  As shown in FIG. 2 (a), the distance between the corneal vertices is the distance on the far visual axis A when the visual axis when the subject (glasses wearer) looks far is the far visual axis A. This is a distance CVD from the corneal apex of the eyeball E of the subject to the inner surface of the spectacle lens L.

  The frame forward tilt angle generally refers to an angle formed by the temple T and the rim of the spectacle frame F. In the present embodiment, as shown in FIG. This is the angle α formed by the straight line L1 orthogonal to the upper side and the tangent line L2 on the outer surface of the spectacle lens L on the far visual axis A.

  The fitting point position is a distance FP from the datum line (horizontal line located at the center of the lens vertical width) D to the fitting point (the position of the subject's pupil) as shown in FIG. is there.

  As shown in FIG. 2B, the interpupillary distance is a distance PD between the centers of the left and right eyes when the subject looks far away. In the present embodiment, the inter-pupil distance PD includes a right-eye monocular pupil distance PDR that is a distance from the center of the right eye pupil to the center of the bridge of the spectacle frame F, and a center of the bridge of the spectacle frame F from the center of the pupil of the left eye. Left-eye monocular pupillary distance PDL, which is a distance up to

  These spectacle wearing parameters are only specific examples in the present embodiment. That is, the spectacle wearing parameters are not limited to these, as long as at least one of these parameters is included, and other parameters may be included. Other than these, for example, a frame warp angle, a distance between near vision cornea vertices, a distance between near vision pupils, an eyeball rotation angle, and the like can be given.

1-C) Specific Example of Measurement Reference Scale S “Measurement reference scale S” in the present embodiment is used as a reference for performing calibration at the time of measuring spectacle wearing parameters, and is configured by a figure of a predetermined size. ing. If it is a figure of a predetermined size (that is, a figure whose figure on the image pickup surface O is known), the measurement reference scale S may extend in a one-dimensional direction, for example. What consists of the combination of the figure extended on each direction of two dimensions on O is desirable. As shown in FIG. 3 to be described later, the measurement reference scale S in the present embodiment surrounds a graphic portion in which four line segments are arranged in a rectangular shape on an imaging surface O having a rectangular planar shape. And a graphic part in which three line segments are arranged in a U-shape. As a result, the measurement reference scale S in the present embodiment includes at least two L-shaped graphic portions having long sides and short sides extending in two-dimensional directions. Moreover, these graphic parts are in a positional relationship in which corresponding long sides and short sides are parallel to each other.

  It is assumed that the figure constituting the measurement reference scale S is given a color that can ensure the contrast with the ground color of the imaging surface O so that the figure can be recognized on the captured image. Specifically, for example, if the ground color of the imaging surface O is white, it can be considered that the measurement reference scale S is configured by a figure such as black, blue, or red.

  Note that the measurement reference scale S mentioned here is merely a specific example, and may be configured by other graphic patterns as long as it is configured by a graphic of a predetermined size (that is, the size is known). .

  Moreover, as a method of forming the measurement reference scale S in the present embodiment, any method may be used. For example, the measurement reference scale S may be printed on a second scale member 21b described later, or a seal on which the measurement reference scale S is printed may be attached to the second scale member 21b.

1-D) Measurement standard part 2
The measurement reference part 2 in the present embodiment is a part having a measurement reference scale S and a part held by a pedestal part 3 described later. By holding the measurement reference part 2 on the pedestal part 3, the measurement reference scale S can be fixedly arranged.

In addition, the measurement reference | standard part 2 in this embodiment has the following structures.
A measurement reference scale member 21 having a measurement reference scale S
A bridge member 22 that connects between the measurement reference scale member 21 and the pedestal 3.
The above configuration will also be described below.

1-Da) Measurement reference scale member 21
The measurement reference scale member 21 in the present embodiment is a member having an imaging surface O that is imaged together with the face of the subject wearing the spectacle frame F for measuring spectacle wearing parameters. A measurement reference scale S of a predetermined size is formed on the imaging surface O.
In addition, the material of the measurement reference scale member 21 may be arbitrary. For example, it may be formed lightweight using a resin material. Considering that it becomes easier to hold by the pedestal portion 3 described later, it is preferable that the weight is light.
The measurement reference scale member 21 is not limited to a specific configuration as long as the measurement reference scale S having a predetermined size is formed. In the present embodiment, the measurement reference scale member 21 having a rectangular shape in plan view is used. Then, a measurement reference scale S is formed along one side extending in the horizontal direction in the rectangle, and this measurement reference scale S is used for calibration. However, the measurement reference scale member 21 exemplified in the present embodiment has not only a rectangular shape in plan view but also a large feature. This will be described in detail later.

1-Db) Bridge member 22
The bridge member 22 in the present embodiment is a member that connects the measurement reference scale member 21 and the pedestal portion 3.
Similarly to the measurement reference scale member 21, the bridge member 22 may be any material. For example, it is preferable to use a resin material to make it lightweight.
The bridge member 22 is not limited to a specific configuration as long as it can connect the measurement reference scale member 21 and the pedestal portion 3. As an example, there is a bridge member 22 as shown in FIG. FIG. 4 is an explanatory view showing an example of use of the bridge member 22 in the present embodiment.

  As shown in FIG. 4, the bridge member 22 in the present embodiment has a crank shape. The bridge member 22 includes a first bridge member 22a, a second bridge member 22b, and a third bridge member 22c, counting from the side held by the pedestal portion 3. The end portion of the first bridge member 22a and the end portion of the second bridge member 22b are connected to each other, and can be fixed as long as no force is applied while being rotatable around the connection point. doing. The other end of the second bridge member 22b and the end of the third bridge member 22c are connected in the same configuration. The measurement reference scale member 21 is engaged with the other end of the third bridge member 22c. At this time, the third bridge member 22c and the measurement reference scale member 21 are engaged so that the third bridge member 22c and the measurement reference scale S in the measurement reference scale member 21 are parallel to each other.

  As shown in FIG. 4, in the bridge member 22 in the present embodiment, the first bridge member 22 a and the third bridge member 22 c are maintained in a parallel state.

  For details, see <3. Non-contact measurement method> For example, when the measurement reference scale S is imaged together with the face side of the subject, not only the measurement reference scale S but also the temple T of the eyeglass frame F worn by the subject is horizontally arranged. It is preferable to arrange.

  Therefore, first, when the pedestal 3 holds the first bridge member 22a, the third bridge member 22c naturally becomes horizontal by engaging the first bridge member 22a horizontally, and as a result, engages with the third bridge member 22c. The measurement reference scale S in the measurement reference scale member 21 is also horizontal. In addition, since the measurement reference scale member 21 is not in contact with the subject, the measurement reference scale S remains fixed even when the subject moves his / her face.

  By arranging the temple T of the spectacle frame F and the measurement reference scale S in parallel with each other, the temple T can also be arranged horizontally. Therefore, when imaging the temple T through the measurement reference scale S, it is necessary to arrange the temple T and the measurement reference scale S so that the temple T and one side of the measurement reference scale S overlap. Therefore, by adopting the configuration of the bridge member 22 described above, the position of the measurement reference scale S in the vertical direction is adjusted while maintaining the measurement reference scale S in a horizontal state as indicated by the white arrow in FIG. It becomes possible. By doing so, it becomes possible to image both the temple T and the measurement reference scale S in a state where they are parallel and horizontal to each other, thereby improving the measurement accuracy.

1-E) Pedestal part 3
The pedestal portion 3 in the present embodiment can fix the arrangement of the measurement reference scale S by holding the measurement reference portion 2. By doing so, it is possible to easily and accurately measure the spectacle wearing parameters while making the measurement reference scale S non-contact with the subject.

The pedestal portion 3 may be arbitrary as long as it can hold the bridge member 22 and fix the arrangement of the measurement reference scale S in the measurement reference scale member 21. The same applies to the shape of the base 3.
However, in order to fix the arrangement of the bridge member 22 and the measurement reference scale member 21, it is preferable to increase the weight of the base portion 3.

  In addition, as an example of a preferable configuration of the pedestal portion 3, a base member 31 that can be fixed and placed on the desk D, a support member 32 that extends from the support member 31 in the top-to-bottom direction, and a support member 32. An attached member having a holding member 33 having a configuration capable of holding the first bridge member 22a is mentioned.

  The holding member 33 attached to the column member 32 has a configuration for holding the first bridge member 22a. For example, the holding member 33 may be a clamp that can hold the first bridge member 22a, or a configuration that can be engaged with the first bridge member 22a. In order to make it possible to adjust the height at which the measurement reference scale S is disposed, it is preferable that the holding member 33 is movable in the vertical direction with respect to the support member 32.

The base member 31 is rectangular in plan view. The reason will be described with reference to FIG. FIG. 5 is a schematic plan view of the self-supporting measurement auxiliary tool 1 in the present embodiment.
If the base member 31 is rectangular in plan view, for example, by aligning one side l to the end of the desk D, another side m of the base member 31 is perpendicular to the side l. At this time, the bridge member 22 held by the support member 32 and the measurement reference scale member 21 engaged with the bridge member 22 are made parallel to one side m. In this way, the self-supporting measuring aid 1 is arranged. Then, the subject aligns the direction of the line of sight in parallel with the side m while visually checking the side m of the base member 31. This facilitates positioning to a “predetermined position (details will be described later)” at the time of imaging.

<2. Measurement reference scale member 21>
Next, in the present embodiment, a configuration example of the measurement reference scale member 21 used when measuring the spectacle wearing parameters will be described. As described above, the measurement reference scale member 21 according to the present embodiment has a great feature other than the self-supporting measurement auxiliary tool 1 having the measurement reference portion 2 and the pedestal portion 3 described above.
FIG. 3 is an explanatory diagram showing a configuration example of the measurement reference scale member 21 in the present embodiment. (A) shows the state which folded the 1st scale member 21a and the 2nd scale member 21b, (b) shows the state which opened the 1st scale member 21a and the 2nd scale member 21b.

The measurement reference scale member 21 described in the present embodiment has the following configuration as shown in FIG.
The first scale member 21a arranged at a predetermined relationship with at least one of the spectacle frame F or the subject's face
The second scale member 21b formed with the measurement reference scale S
A connecting member 21c that connects the first scale member 21a and the second scale member 21b.
Hereinafter, each configuration will be described in detail.

2-A) First scale member 21a
The first scale member 21a is formed of, for example, a plate-like material having a rectangular shape (for example, a rectangular shape) in plan view, and at least the spectacle frame F worn by the subject's face or the subject. It is arranged at a position in a predetermined relationship with one. Here, “arranged at a position having a predetermined relationship” means being arranged so as to maintain the predetermined relationship at the position. In addition, the “predetermined relationship” refers to a positional relationship set in advance so as to be suitable for the measurement of spectacle wearing parameters. As one specific example, the subject wears on the subject's dominant eye side. A positional relationship of the eyeglass frame F in contact with the temple T or a relationship positioned in the vicinity of the temple T can be given. More specifically, an arrangement relationship in which one side of the measurement reference scale S and the temple T of the spectacle frame F are parallel, or one side of the measurement reference scale S and the datum line of the spectacle frame F are parallel. Can be mentioned. However, the example given here is only one specific example. If the positional relationship is set in advance so as to be suitable for measurement of spectacle wearing parameters, the positional relationship in contact with the rim of the spectacle frame or the face of the subject. Other examples such as a relationship located in the vicinity of can also fall under the “predetermined relationship”.
In such support and fixing, it is desirable that the first scale member 21a is formed to be lightweight using, for example, a resin material.
The first scale member 21a in the present embodiment is formed with a hook 210 for engaging with the third bridge member 22c. The hook 210 is formed at the upper end and the lower end of the first scale member 21a. By passing the third bridge member 22c between the two hooks 210, the first scale member 21a and thus the measurement reference scale member 21 are held on the third bridge member 22c. With such a configuration, the measurement reference scale member 21 can be attached to and detached from the bridge member 22.

2-B) Second scale member 21b
The second scale member 21b is formed of, for example, a rectangular (for example, rectangular) plate-like material having a planar shape equivalent to that of the first scale member 21a. Then, on one surface side of the plate-like material, there is an imaging surface O that is imaged together with the face of the subject wearing the spectacle frame F for the measurement of spectacle wearing parameters. A measurement reference scale S of a predetermined size is formed on the imaging surface O, as will be described in detail later.
The second scale member 21b is also preferably formed to be light using, for example, a resin material, like the first scale member 21a.

2-C) Connecting member 21c
The connecting member 21c connects the first scale member 21a and the second scale member 21b. However, the connecting member 21c can move the relative position of the second scale member 21b with respect to the first scale member 21a, and can maintain the relative position at an arbitrary position. The member 21b is connected. Note that the “arbitrary position” referred to herein includes a position where the imaging surface O of the second scale member 21b is imaged together with the face side of the subject, and a measurement target of the second scale member 21b. It is assumed that the position where the imaging surface O is imaged together with the front face of the subject is included.
In order to realize such a coupling mode with a simple configuration, the coupling member 21c can rotate the first scale member 21a and the second scale member 21b within a predetermined angle range (see arrow R in FIG. 3). The hinge mechanism is used. The hinge mechanism is arranged at one end edge of the rectangular plate-like first scale member 21a and second scale member 21b. As a result, the first scale member 21a and the second scale member 21b are connected via the connecting member 21c formed of a hinge mechanism, and the angle formed by the hinge mechanism is changed around the connecting axis of the hinge mechanism. become. Moreover, if it is a hinge mechanism, the relative position of the 1st scale member 21a and the 2nd scale member 21b can move by adjustment of the fitting dimension of the connecting shaft which comprises the said hinge mechanism, and its bearing part, And it becomes possible to implement | achieve easily the mechanism which can maintain the state after a movement in arbitrary positions.
In addition, it is desirable that the hinge mechanism constituting the connecting member 21c is lightly formed using a resin material, for example, similarly to the first scale member 21a and the second scale member 21b except for the connecting shaft.

<3. Non-contact measurement method>
Next, the procedure of the measurement method performed using the self-supporting measurement auxiliary tool 1 having the above-described configuration will be described with reference to FIG. FIG. 6 is a flowchart showing the procedure of the non-contact measurement method in the present embodiment. Again, one of the features of the present invention is to measure the spectacle wearing parameters while keeping the self-supporting measuring aid 1 and the wearer's face or the spectacle frame F in a non-contact state.

  The contents of the following steps are <1. Self-supporting measuring aid 1> and <2. There is also an overlap with the content described in the measurement reference scale member 21>. Therefore, for contents not described below, <1. Self-supporting measuring aid 1> and <2. As described in the measurement reference scale member 21>. For contents not described below, a known technique may be adopted as appropriate.

  Further, in the following steps, in order to facilitate understanding of the invention, a description will be given of a specific embodiment of each part or each member of the self-supporting measuring aid 1. Of course, the present invention is not limited to a specific embodiment of each part or each means.

The non-contact measurement method in the present embodiment has the following steps.
A preparatory process in which the self-supporting measurement auxiliary tool 1 and the subject are arranged in a predetermined manner. A process for imaging the face side surface of the subject wearing the spectacle frame F and the measurement reference scale S in the self-supporting measurement auxiliary tool 1 One imaging process (face side)
First calibration step (face side surface) that performs dimension calibration of the imaging result based on the measurement reference scale S on the imaging target surface O included in the imaging result
Second imaging step (front face) for imaging the front face of the subject wearing the spectacle frame F and the measurement reference scale S in the self-supporting measuring aid 1
Second calibration step (front face) for calibrating the dimension of the imaging result based on the measurement reference scale S on the imaging surface O included in the imaging result
Hereinafter, each process is explained in full detail. In that case, it demonstrates using FIG. 7 with FIG. FIG. 7 is an explanatory view showing a specific example of a usage mode of the self-supporting measuring auxiliary tool 1 in the present embodiment. (A) shows the state of the first imaging step (face side), and (b) shows the state of the second imaging step (face front).

3-A) Preparation Step First, the self-supporting measurement auxiliary tool 1 is prepared. At that time, one side l of the base member 31 having a rectangular shape in plan view in the pedestal portion 3 is aligned with the end portion of the desk D. In other words, one side m of the base member 31 is arranged perpendicular to the end of the desk D. Then, the bridge member 22 is attached to the support member 32, and one side of the measurement reference scale S in the measurement reference scale member 21 engaged at the tip of the bridge member 22 is horizontal and parallel to one side m of the base member 31. To place.

In the present embodiment, the face side surface SF of the subject wearing the spectacle frame F is imaged and the intercorneal apex distance CVD and the frame forward tilt angle α among the spectacle wearing parameters are obtained, and then the subject is examined. An example will be described in which the front face FF of the examiner is imaged to obtain the fitting point position PD and the interpupillary distance PD among the spectacle wearing parameters.
The measurement reference scale member 21 is used as described below when measuring the spectacle wearing parameters of the subject wearing the spectacle frame F.

  For example, when imaging the face side surface SF of the subject wearing the spectacle frame F, first, the measurement reference scale member 21 is closed, that is, the connection axis of the hinge mechanism constituting the connection member 21c is the center. Then, the first scale member 21a and the second scale member 21b are folded so as to overlap (see, for example, FIG. 3A). Then, with the first scale member 21a and the second scale member 21b folded, the face of the subject or the subject wears the first scale member 21a on the subject's dominant eye side. The eyeglass frame F is arranged at a predetermined relationship with at least one of the eyeglass frames F. More specifically, the connecting member 21c is positioned on the rim R side of the spectacle frame F, and the imaging surface O of the second scale member 21b is directed outward (opposite to the face side of the subject). In the state, the first scale member 21a is arranged. These operations are performed by a measurer of spectacle wearing parameters (for example, a store clerk of a spectacle store).

Then, the measurement reference scale member 21 requests the subject to take a posture such that the temple T of the spectacle frame F is parallel to one side of the measurement reference scale S as shown in FIG. Thus, on the imaging surface O of the second scale member 21b, its long side extends in a direction along the temple T of the spectacle frame F, and its short side extends in a direction perpendicular to the temple T. Of course, instead of asking the subject, the side of the measurement reference scale S is arranged in parallel to the temple T so as to match the temple T of the spectacle frame F worn by the subject in the normal position. The measurer may adjust the arrangement of the bridge member 22.
At this time, it is conceivable that the imaging surface O is arranged so that one end edge thereof coincides with the position of the corneal apex of the eyeball E of the subject. You may make it the one end edge of the imaging surface O leave | separate from the position of a cornea vertex. Further, in the illustrated example, when the face of the subject is viewed from the side, the surface to be imaged O is located in the vicinity of the temple T of the spectacle frame F and away from the temple T. However, the present invention is not limited to this, and the surface to be imaged O may be arranged so as to be in contact with the temple T of the spectacle frame F.

3-B) First imaging step (face side)
After the imaging surface O is positioned on the side of the subject's face, the eyeglass frame F is worn along with the measurement reference scale S formed on the imaging surface O of the measurement reference scale member 21 thereafter. An image of the face side SF of the subject is taken. Since the imaging at this time does not require positioning of the face of the subject, the imaging function and the information processing function are not used instead of the conventional spectacle wearing parameter measuring device (see, for example, Patent Document 1). While using a portable terminal device (for example, a tablet-type terminal) or an imaging camera capable of transferring data to a computer device, it is possible to perform the posture in a natural posture for the subject. Hereinafter, the imaging function, imaging camera, and the like of the portable terminal device used for imaging in this embodiment are simply referred to as “camera unit”. Note that imaging by the camera unit is performed by a measurer of spectacle wearing parameters (for example, a store clerk of a spectacle store).

In imaging, for example, a rectangular guide frame is displayed in the finder for imaging, and the rectangular part of the measurement reference scale S formed on the imaging surface O is aligned with the guide frame. It is conceivable to perform imaging when the rectangular portion is aligned with the guide frame. This is because the subject's face side surface SF and the image pickup surface O of the measurement reference scale member 21 can be imaged without tilting.
For example, when the imaged surface O is tilted without facing the camera unit, the rectangular part of the measurement reference scale S on the imaged surface O is distorted in the viewfinder and is no longer rectangular. It will not match the guide frame in the viewfinder. In other words, if the rectangular portion of the measurement reference scale S matches the guide frame in the finder, it can be said that the imaging target surface O is in a state of facing the camera unit. The imaging result of the face side surface SF of the subject in a state where there is no inclination is obtained.
At this time, if the measurement reference scale S on the imaged surface O is composed of a combination of figures extending in each of the two-dimensional directions on the imaged surface O, in any of the two-dimensional directions, There can be no inclination.
In addition, if the two-dimensional figure extending in each direction includes at least two L-shaped figure parts, the guide frame in the finder should also correspond to this, so that it should be matched in the finder. Therefore, it is easy to align the measurement reference scale S with the guide frame, and as a result, it is possible to expect higher accuracy of tilt removal when imaging.

3-C) First calibration step (face side)
Based on the imaging result obtained in this way, the information processing function in the portable terminal device or computer device that acquired the imaging result is the spectacle wearing parameter to be measured on the image that is the imaging result. The corneal apex distance CVD and the frame forward tilt angle α are determined. Regarding how to obtain the corneal apex distance CVD and the frame forward tilt angle α on the captured image, for example, specify the corneal apex position and the upper end position and the lower end position of the rim R of the spectacle frame F on the captured image. Although it is possible to calculate by recognizing the distance obtained by appropriately connecting the points as necessary, the present invention is not limited to this, and other known calculation methods may be used.

  At this time, however, at least the corneal apex distance CVD needs to be calibrated to associate the size in the real space with the size in the captured image in order to obtain it on the captured image. However, the obtained captured image includes an image of the measurement reference scale S formed on the imaging target surface O of the measurement reference scale member 21. The measurement reference scale S is configured by a graphic of a predetermined size, and the size of the graphic (that is, the size in real space) is known. Therefore, the information processing function that performs processing on the captured image performs calibration that associates the size in the real space with the size on the captured image using any of the graphic parts constituting the measurement reference scale S. It is possible to perform scale conversion on the captured image.

  It is desirable that the graphic portion of the measurement reference scale S used for calibration has a certain size. This is to increase the accuracy of calibration. For example, when a camera unit having 14 million pixels is used to image the imaged surface O with the imaged surface O of the measurement reference scale member 21 facing the distance of about 400 mm from the camera unit. If the figure part of the measurement standard scale S used for calibration has a size (length) of 60 mm or more, the length variation on the captured image of the figure part is suppressed to within ± 0.3 mm. It is done. However, it has been found that if it is smaller than that, the measurement variation becomes large. Therefore, it is desirable that the graphic part of the measurement reference scale S has a certain size (for example, a size of 60 mm or more).

3-D) Second imaging step (front face)
Thereafter, when imaging the face front FF of the subject wearing the spectacle frame F, the position of the first scale member 21a of the measurement reference scale member 21 (that is, the face of the subject or the spectacle frame). The second scale member 21b is moved around the connecting shaft of the hinge mechanism constituting the connecting member 21c of the measurement reference scale member 21 while maintaining a predetermined relationship with respect to at least one of F. Then, the measurement reference scale member 21 is opened, that is, the first scale member 21a and the second scale member 21b form an angle of, for example, about 90 ° ± 20 ° with the connecting member 21c as a fulcrum (for example, FIG. 3). (Refer to (b)). The movement of the second scale member 21b is performed by, for example, a spectacle wearing parameter measurer (for example, a store clerk at a spectacle store).

Thereby, as shown in FIG. 3B, the measurement reference scale member 21 has the imaging surface O of the second scale member 21 b extending in the direction along the datum line D of the spectacle frame F, The posture is such that the short side extends in a direction perpendicular to the short side, and the short side is positioned in a state where imaging is possible on the front side of the face of the subject.
At this time, if the imaging surface O is arranged so that one end edge of the imaging surface O matches the position of the corneal apex of the eyeball of the subject when imaging the face side surface SF of the subject, one end thereof Since the second scale member 21b moves around the connecting member 21c located on the edge side, after the movement, the second scale member 21b is located on the same plane as the corneal apex of the eyeball of the subject or on a plane that can be viewed with this. .

  After the imaging surface O is positioned on the front side of the subject's face, the spectacle frame F is worn along with the measurement reference scale S formed on the imaging surface O of the measurement reference scale member 21 thereafter. An image of the face front FF of the subject is taken. Also for the imaging at this time, as in the case of the face side surface SF described above, the spectacle wearing parameter measuring device (for example, a clerk of a spectacle store) is not a spectacle wearing parameter measuring device (see, for example, Patent Document 1) having a large structure. It is possible to perform in a posture that is natural for the subject while using the camera unit operated by the user.

  When imaging, the face of the subject does not need to be positioned, so the face front FF may tilt without facing the camera unit. Therefore, in imaging, as in the case of the face side surface SF described above, the imaging target surface O faces the camera unit using a rectangular guide frame displayed in the finder for imaging. It is conceivable to perform imaging of the subject's face front FF and the imaging surface O of the measurement reference scale member 21 in a state (that is, no inclination).

3-E) Second calibration step (front face)
Based on the imaging result obtained in this way, the information processing function in the portable terminal device or computer device that acquired the imaging result is the spectacle wearing parameter to be measured on the image that is the imaging result. The fitting point position FP and the inter-pupil distance PD are obtained. Regarding how to obtain the fitting point position FP and the inter-pupil distance PD on the captured image, for example, the pupil center position and the upper end position and the lower end position of the rim R of the spectacle frame F are specified on the captured image. However, the present invention is not limited to this, and other known calculation methods may be used.

  Also at this time, calibration (calibration) that associates the size in the real space with the size in the captured image is necessary. This calibration can be performed in the same manner as in the case of the face side surface SF described above, since the image of the measurement reference scale S on the imaged surface O is included in the captured image.

  In the present embodiment, the case where the face front side FF is subsequently imaged after the face side surface SF of the subject is imaged has been described as an example. However, the order may be reversed. . Even in the reverse case, the measurement reference scale member 21 moves the second scale member 21b with the connecting member 21c as a fulcrum while maintaining the position where the first scale member 21a is disposed, It is possible to deal with imaging of the side surface SF and the face front surface FF.

<4. Advantages of the embodiment>
According to the self-supporting measurement auxiliary tool 1 described in the present embodiment and the non-contact measurement method performed using the same, the following effects can be obtained.

  First, in this embodiment, unlike the method described in Patent Document 1, a large-scale device is not required. More specifically, when the self-supporting measurement auxiliary tool 1 in the present embodiment is used, the measurement reference scale S of the self-supporting measurement auxiliary tool 1 and the subject wearing the spectacle frame F can be imaged. That's it. Therefore, the spectacle wearing parameters can be obtained relatively easily and inexpensively. By doing so, the spectacle wearing parameters can be obtained in many spectacle stores, and the performance of the spectacle lens required when the subject wears the spectacles can be derived.

  Moreover, in addition to the merit of using the measurement reference scale S, the following effects corresponding to the above problems 1 to 4 can be enjoyed.

(Effect 1)
Since the scale auxiliary tool (measurement reference unit 2 in the present embodiment) is not attached to the spectacle frame F, the possibility of scratching the spectacle frame F can be eliminated. Therefore, finally, it becomes certain that the subject purchases the spectacles in which the spectacle lens is fitted in the spectacle frame F without any scratches.

(Effect 2)
Since the measurement reference part 2 is not attached to the spectacle frame F, the possibility that the measurement reference part 2 contacts the skin of the subject can be eliminated. As a result, it is possible to eliminate the possibility that the subject will feel uncomfortable. In addition, the possibility that the measurement reference unit 2 is in contact with the skin of the subject can be reduced to zero, and the subject is not strained. Further, as an excellent effect, even if another subject uses the measurement reference unit 2, the use of the measurement reference unit 2 is absolutely non-contact use, and thus there is no possibility of causing a sanitary problem. As a result, it is not necessary to disinfect the measurement reference unit 2 every measurement, and the burden on the spectacle store is remarkably reduced.

  Moreover, by using the self-supporting measurement auxiliary tool 1 in the present embodiment, the measurement accuracy is remarkably improved as shown in the following effects.

(Effect 3)
Since the measurement reference unit 2 is not attached to the spectacle frame F, the spectacle frame F does not slide down due to the weight of the measurement reference unit 2 itself. As a result, the wearing state of the glasses can be reproduced as faithfully as possible, and thus the glasses wearing parameters can be obtained accurately.

(Effect 4)
Since the measurement reference unit 2 is not attached to the spectacle frame F, even if the subject's face moves, the measurement reference scale S does not blur during imaging. Then, accuracy is improved when the spectacle wearing parameters are calculated from the captured image.

  As described above, when measuring spectacle wearing parameters, it is possible to perform calibration related to the captured image for measurement with ease, low cost, and accuracy while reducing the burden on the subject as much as possible. It is possible to provide the measurement reference scale member 21 and the measurement method.

Furthermore, in addition to the above effects, the measurement reference scale member 21 of the present embodiment has the following excellent effects.
In the measurement reference scale member 21 of the present embodiment, the first scale member 21a is disposed at a position having a predetermined relationship with at least one of the spectacle frame F or the subject's face, and the second scale member 21b connected thereto is covered. An imaging surface O is imaged together with the examiner's face, and a measurement reference scale S is formed on the imaging surface O. Therefore, by using the measurement reference scale S on the imaging surface O, it is possible to perform calibration for associating the size of the object in the real space and the size of the object on the captured image. Become. In other words, even when measuring spectacle wearing parameters based on the imaging results of the subject's face, there is no need to position the subject's face, and the subject does not feel cramped Moreover, the spectacle wearing parameters can be measured with high accuracy through calibration. As described above, the measurement reference scale member 21 of the present embodiment functions as a means for enabling calibration.
In addition, the measurement reference scale member 21 of the present embodiment is capable of first imaging even when a plurality of imaging results (for example, an image of the face side surface SF and an image of the face front surface FF) are required for measuring the spectacle wearing parameters. While maintaining the position where the scale member 21a is disposed, the relative scale of the second scale member 21b with respect to the first scale member 21a is simply moved, and the measurement reference scale on the imaged surface O is obtained for each of a plurality of imaging results. S can be included. In other words, it is not necessary to prepare separate means for dealing with a plurality of imaging results, and if one measurement reference scale member 21 is prepared, a plurality of imaging results can be obtained simply by moving the position of the second scale member 21b. Therefore, the means for calibration is simple, and the measurement process of the spectacle wearing parameters is not complicated, and the convenience of the measurement process can be improved. Furthermore, since it is possible to deal with a plurality of imaging results simply by moving the position of the second scale member 21b, even if a plurality of imaging results are required, the measurement reference scale member 21 is re-installed for that purpose. In this respect, it can be said that the convenience of the measurement process can be improved without requiring the subject to move the direction of the face.
As described above, according to the measurement reference scale member 21 of the present embodiment, when measuring the spectacle wearing parameters, it is possible to easily and accurately perform calibration relating to the captured image for the measurement.

  In particular, as described in the present embodiment, the imaging surface O of the second scale member 21b of the measurement reference scale member 21 is imaged at least together with the face side surface SF of the subject and the front face FF of the subject. If it is arranged selectively at both of the positions to be imaged, the spectacle wearing parameters CVD, inter-corneal apex distance CVD, frame forward tilt angle α, fitting point position FP, and inter-pupil distance PD are measured. It will be very suitable. That is, each of these spectacle wearing parameters is indispensable for the design, manufacture and sale of the spectacle lens, but according to the measurement reference scale member 21 of the present embodiment, for each item of these spectacle wearing parameters, If one measurement reference scale member 21 is prepared, each measurement can be handled. Therefore, since only one measurement reference scale member 21 needs to be prepared, each measurement can be simplified, and as a result, it is very suitable for performing each measurement.

  Further, in the measurement reference scale member 21 of the present embodiment, a connecting member 21c that connects the first scale member 21a and the second scale member 21b is constituted by a hinge mechanism. Therefore, even if it is a case where the relative position of the 1st scale member 21a and the 2nd scale member 21b is connected so that movement is possible, the connection mode can be realized by simple composition. And if it is a hinge mechanism, the mechanism which can move the relative position of the 1st scale member 21a and the 2nd scale member 21b, and can maintain the state after a movement in arbitrary positions easily is implement | achieved. Is possible.

  Further, in the measurement reference scale member 21 of the present embodiment, the first scale member 21a is arranged on the dominant side of the subject for the convenience of measuring the corneal apex distance CVD when measuring the spectacle wearing parameters. Used. Whether the subject's dominant eye is the right eye or the left eye differs depending on the subject. On the other hand, in the measurement reference scale member 21 of the present embodiment, the connecting member 21c configured by the hinge mechanism is disposed on one end edge of the rectangular plate-like first scale member 21a and the second scale member 21b. By simply reversing the top-and-bottom direction when the measurement reference scale member 21 is arranged, it is possible to cope with both the case where the subject's dominant eye is the right eye and the case where the subject is the left eye. Therefore, it is only necessary to prepare one measurement reference scale member 21 regardless of which side of the subject's dominant eye is. This simplifies parameter measurement and is very suitable for measuring the spectacle wearing parameter measurement.

<5. Modified example>
While embodiments of the present invention have been described above, the above disclosure is intended to illustrate exemplary embodiments of the present invention. That is, the technical scope of the present invention is not limited to the exemplary embodiments described above. In addition, there is no limitation in particular in the number of each part and each member which were enumerated above.

(Modification of measurement standard part 2)
In the above embodiment, the case where the measurement reference unit 2 includes the measurement reference scale member 21 and the bridge member 22 has been described. Of course, the measurement reference part 2 may include other members. On the other hand, the case where the measurement reference part 2 does not include these members can also be employed. When a specific example is given, the measurement reference | standard part 2 consists of a long plate-shaped member, and the case where the measurement reference | standard scale S is formed in the front-end | tip of the said member is mentioned. In this case, the imaged part refers to the main surface on which the measurement reference scale S is formed in a plate-like member. In this case, the pedestal portion 3 directly holds the measurement reference portion 2.

(Modification of pedestal 3)
In said embodiment, the case where the base part 3 had the base member 31 and the support | pillar member 32 was described. Of course, the pedestal 3 may include other members. On the other hand, the case where the base part 3 does not include these members can also be employed. If a specific example is given, the case where the structure which can fix arrangement | positioning of the 1st bridge member 22a with respect to the base member 31 is provided is mentioned. As an example, a hole having the same shape as the cross-sectional shape of the first bridge member 22a is formed in the base member 31, and the first bridge member 22a is fitted and fixed in the hole. The structure of holding is mentioned. However, in order to be able to adjust the height at which the measurement reference scale S is arranged, it is preferable to provide the support member with a clamp that can move in the vertical direction with respect to the column member 32. Of course, a plurality of holes are provided so as to be aligned in the vertical direction with respect to the base member 31, and the height at which the measurement reference scale S is disposed by fitting and fixing the first bridge member 22 a in a predetermined hole. It may be adjustable. Moreover, as long as the base part 3 can implement | achieve a self-supporting type | mold, you may employ | adopt what the base member 31 is placed on the floor etc. instead of on the desk D.

(Modification of measurement reference scale member 21)
In the above embodiment, the case where the measurement reference scale member 21 includes the first scale member 21a, the second scale member 21b, and the connecting member 21c has been described. Of course, the measurement reference scale member 21 may include other members. On the other hand, it is also possible to adopt a case where the measurement reference scale member 21 does not include these members. As a specific example, the measurement reference scale member 21 is a single plate-like member, and the measurement reference scale S is printed on the main surface of the member. Even if it is a single plate-like member, the measurement reference part 2 or the pedestal part 3 is provided with a movable part, the base member 31 is rearranged, or the subject changes the orientation of the face. It is possible to cope with the measurement on the side face or front face of the examiner.
In contrast to providing the measurement reference scale member 21 with the hook 210 for hooking the measurement reference scale member 21 on the bridge member 22, the hook 210 may be provided on the bridge member 22. However, when the first scale member 21a, the second scale member 21b, and the connecting member 21c are provided, the position of the second scale member 21b can be moved, and the subject needs to change the face orientation. Is preferable.

In the above embodiment, the first scale member 21a and the second scale member 21b constituting the measurement reference scale member 21 are both made of a rectangular plate material. The invention is not limited to this. That is, the first scale member 21a has any shape or member as long as the first scale member 21a is arranged in a predetermined relationship with at least one of the face of the subject or the spectacle frame F worn by the subject. May be formed. In addition, the second scale member 21b has an imaging surface O, and the relative position with respect to the first scale member 21a is connected to the first scale member 21a so as to be movable. It may be formed of any shape or member.
The same applies to the measurement reference scale S formed on the imaging surface O in the second scale member 21b. In other words, the measurement reference scale S is configured to include at least a figure portion of a predetermined size, and is preferably implemented as long as it is composed of a combination of figures extending in two-dimensional directions on the imaging surface O. It is not based on the rectangular figure pattern as exemplified in the form, but it may be, for example, a triangular figure pattern or a polygonal figure pattern of pentagon or more, or a figure pattern formed by combining separated line segment figures. .

  Moreover, in said embodiment, although the case where the connection member 21c which connects the 1st scale member 21a and the 2nd scale member 21b was comprised by the hinge mechanism was mentioned as an example, this invention is limited to this. It is not a thing. That is, the connecting member 21c is a hinge mechanism as long as it connects the first scale member 21a and the second scale member 21b so that the relative position of the second scale member 21b with respect to the first scale member 21a is movable. Other mechanisms (for example, a flexible joint mechanism) may be used.

(Modification of bridge member 22)
In the above embodiment, the case where the bridge member 22 includes the first bridge member 22a, the second bridge member 22b, and the third bridge member 22c has been described. Of course, the bridge member 22 may include other members. Further, the bridge member 22 may be configured by only the first bridge member 22a.

  Moreover, in said embodiment, the case where the bridge member 22 was engageable with the measurement reference | standard scale member 21 (1st scale member 21a) was described. On the other hand, it is sufficient that the bridge member 22 and the first scale member 21a are fixed to each other. Therefore, it is not possible to engage with each other, and both may be fixed.

Moreover, in said embodiment, by engaging the 1st scale member 21a with the 3rd bridge member 22c arrange | positioned horizontally, one side of the 1st scale member 21a is also horizontal and with respect to the 3rd bridge member 22c. The case where they are arranged in parallel has been described. On the other hand, the third bridge member 22c may not be arranged horizontally. Even if the third bridge member 22c is not arranged in parallel, it is sufficient that one side of the measurement reference scale S is horizontal when the first scale member 21a is engaged with the third bridge member 22c. For example, even if the third bridge member 22c is a disk-shaped member, a notch is made in the disk-shaped member and a protrusion is provided on the first scale member 21a, and the protrusion is You may make it arrange | position one side of the measurement reference | standard scale S horizontally by inserting in a notch.
However, making one side of the measurement reference scale S horizontal is a preferable example, and is not essential. Even if one side of the measurement reference scale S is not horizontal, it is possible to perform calibration for associating the size of the object in the real space with the size of the object on the captured image.

(Modification of measuring aid)
As the name suggests, the present invention is such that the measuring aid is a self-supporting type, and the positional relationship between the measurement reference scale S and the eyeglass frame F worn by the subject or the subject can be appropriately fixed. Has major features. As a result, it is possible to measure the spectacle wearing parameters while maintaining the measurement reference scale S and the subject or the spectacle frame F worn by the subject in a non-contact state. On the other hand, a mode in which the measurement auxiliary tool is not self-supporting is also included. FIG. 8 shows this aspect. FIG. 8 is a schematic view of a measuring aid in another aspect. This aspect will be briefly described as follows.

An instrument for measuring spectacle wearing parameters used when measuring spectacle wearing parameters of a subject wearing the spectacle frame F,
A measurement target scale O of a predetermined size is provided on the imaging target surface O having an imaging target surface O to be imaged by the imaging device together with the face of the subject wearing the spectacle frame F for measurement of spectacle wearing parameters. A measurement reference unit 2 having;
It is a part which connects the said measurement reference | standard part 2 and the said imaging device I, Comprising: It has the structure which can be attached to the said imaging device I, and the distance between the said measurement reference | standard part 2 and the said imaging device I is set. A communication unit 4 having a configuration that can be maintained constant;
A measuring aid.

  If it is said structure, it will become possible to measure the measurement reference | standard part 2 in a non-contact state with respect to the test subject or the spectacles frame F which a test subject wears, and can solve the subject of this invention. . In addition, the distance between the imaging device I (for example, a tablet terminal having the camera unit C) and the measurement reference scale S can be kept constant. In this case, it is not necessary to take the distance between the two into consideration for each calibration. As a result, the time required for calibration can be shortened, and since the distance is constant, it is possible to eliminate a factor that causes a measurement error, thereby improving measurement accuracy.

The connecting unit 4 may have any specific configuration as long as it has the above function. For example, the connecting unit 4 may be configured so that the connecting unit 4 that keeps the distance between the imaging device I and the measurement reference scale S constant can be expanded and contracted by applying force. Further, the measurement reference part 2 may be freely engageable with the communication part 4, or the measurement reference part 2 may be fixed to the tip of the communication part 4. Further, the measurement reference scale S may be printed on the tip of the communication unit 4. The modification about this point is the same as that described in the measurement reference scale member 21 and the bridge member 22.
Further, a configuration that can be freely attached to the imaging apparatus I may be arbitrary. For example, when a tablet terminal is used as the imaging device I, a configuration in which the end of the tablet terminal is held by a clamp may be employed.

DESCRIPTION OF SYMBOLS 1 ......... Stand-alone measuring aid 2 ......... Measurement reference part 21 ... Measurement reference scale member 21a ... First scale member 210 ... Hook 21b ... Second scale member 21c ... Connecting member 22 ... Bridge member 22a ... 1st bridge member 22b ... 2nd bridge member 22c ... 3rd bridge member 3 ......... Base part 31 ... Base member 32 ... Supporting member 33 ... Holding member 4 ......... Communication part D ......... Desk F ... …… Glasses frame T …… Temple S ……… Measuring reference scale O ………… Imaging surface I ………… Imaging device C ……… Camera unit

Claims (9)

An instrument for measuring spectacle wearing parameters used when measuring spectacle wearing parameters of a subject wearing a spectacle frame,
A measurement reference unit having an image pickup surface imaged together with the face of the subject wearing the eyeglass frame for measurement of spectacle wearing parameters, and having a measurement reference scale of a predetermined size on the image pickup surface;
Arrangement so that the measurement reference scale in the measurement reference part and at least one of the spectacle frame and the face of the subject have a predetermined positional relationship in a non-contact state by holding the measurement reference part A pedestal having a configuration that allows the measurement reference scale to be fixed freely;
A self-supporting measuring aid. The measurement standard part is
A measurement scale member having the measurement scale;
A bridge member connecting between the measurement reference scale member and the pedestal portion;
Have
The pedestal is arranged so that the measurement reference scale member and at least one of the spectacle frame and the face of the subject are in a predetermined positional relationship in a non-contact state by holding the bridge member The measurement reference scale member can be fixed freely,
The metric scale member is
A first scale member disposed in a predetermined relationship with at least one of the eyeglass frame or the subject's face;
A second scale member formed with the measurement reference scale;
A connecting member that connects the first scale member and the second scale member so that the relative position of the second scale member to the first scale member is movable;
The self-supporting measuring aid according to claim 1, comprising:   The relative position includes a position where the imaged surface of the second scale member is imaged together with the face side of the subject and a position where the imaged surface of the second scale member is imaged together with the face front of the subject. The self-supporting measuring aid according to claim 2, wherein The first scale member and the second scale member are formed in a plate shape,
The self-supporting measurement auxiliary tool according to claim 2 or 3, wherein the connecting member is configured by a hinge mechanism that allows the first scale member and the second scale member to rotate within a predetermined angle range.   The self-supporting measurement auxiliary tool according to any one of claims 2 to 4, wherein the measurement reference scale member and the bridge member are freely engageable. The spectacle wearing parameters include
The distance between the corneal apexes in the state where the subject wears the spectacle frame,
At least one of the fitting point position and the interpupillary distance in the state,
The self-supporting measuring aid according to any one of claims 1 to 5, wherein:   The predetermined positional relationship is an arrangement in which at least one side of the measurement reference scale is parallel to the temple of the spectacle frame, or an arrangement in which the one side is parallel to the datum line of the spectacle frame. The self-supporting measuring aid according to any one of claims 1 to 6, A method for measuring spectacle wearing parameters of a subject wearing a spectacle frame,
A measurement reference unit having an image pickup surface imaged together with the face of the subject wearing the eyeglass frame for measurement of spectacle wearing parameters, and having a measurement reference scale of a predetermined size on the image pickup surface;
Arrangement so that the measurement reference scale in the measurement reference part and at least one of the spectacle frame and the face of the subject have a predetermined positional relationship in a non-contact state by holding the measurement reference part A pedestal having a configuration that allows the measurement reference scale to be fixed freely;
Prepare a self-supporting measuring aid with
With respect to at least one of the spectacle frame and the face of the subject in a state where the subject and the self-supporting measurement aid are in non-contact and the spectacle frame and the self-supporting measurement aid are in non-contact. The self-supporting measuring aid is arranged so as to have a predetermined positional relationship,
The imaged surface is positioned so as to be imaged together with the subject's face side or face front, and the size of the imaged result is based on the measurement reference scale on the imaged surface included in the imaged result obtained in that state. A non-contact measurement method that performs calibration. The measurement standard part is
A measurement scale member having the measurement scale;
A bridge member connecting between the measurement reference scale member and the pedestal portion;
Have
The pedestal is arranged so that the measurement reference scale and at least one of the spectacle frame and the face of the subject are in a predetermined positional relationship in a non-contact state by holding the bridge member. The measurement reference scale has a configuration that can be freely fixed,
The metric scale member is
A first scale member disposed in a predetermined relationship with at least one of the eyeglass frame or the subject's face;
A second scale member formed with the measurement reference scale;
A connecting member that connects the first scale member and the second scale member so that the relative position of the second scale member to the first scale member is movable;
Have
The first scale member and the second scale member are connected via a connecting member so that the relative position of the second scale member with respect to the first scale member is movable, and the second scale member has a cover. The measurement reference scale is formed on the imaging surface,
Arranging the first scale member in the self-supporting measuring auxiliary tool at a predetermined relationship with at least one of the spectacle frame or the face of the subject;
The second scale member connected to the first scale member is positioned so that the imaged surface is imaged together with either the face side or the face front of the subject, and is included in the imaging result obtained in that state Calibrate the dimensions of the imaging result based on the measurement reference scale on the imaged surface,
The second scale member is moved by moving a relative position of the second scale member with respect to the first scale member while maintaining a positional relationship between the first scale member and at least one of the eyeglass frame or the face of the subject. Is positioned so as to be imaged together with either the face side surface or the face front, and dimensional calibration of the imaging result based on the measurement reference scale on the imaging surface included in the imaging result obtained in that state The non-contact type measurement method according to claim 8, wherein the measurement is performed.

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