JP2010243827A - Apparatus for supporting design of eyeglasses - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To support design of eyeglasses which makes correction by a lens possible even when the line of sight of an eyeglass user changes the direction without the need of skills when preparing a pair of eyeglasses from a prescribed lens and a desired eyeglass frame. <P>SOLUTION: The eyeglass user A wearing a pair of eyeglasses is imaged by cameras 2, 3, two-dimensional coordinates of the eyeglass frame to an eyeball E are obtained, and the three-dimensional relative positional relation of the eyeball E of the eyeglass user, the line of sight, and the peripheral edge part, especially lower peripheral edge part, of the lens L is obtained by an operation part 6 based on the two-dimensional coordinates. Thus, whether or not the line of sight is to be corrected by the lens L is determined, and the propriety of the combination of the prescribed lens L and the desired eyeglass frame is determined finally. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

 The present invention relates to an eyeglass design support device that supports selection of an appropriate combination of an eyeglass frame and a lens when making eyeglasses newly.

  Specifically, when newly making eyeglasses, that is, when designing eyeglasses, a lens is first prescribed according to the eyeglass user.

 Next, the spectacle user wears spectacles obtained by integrating the prescribed lens and the spectacle frame desired by the spectacle user.

 Here, when the desired spectacle frame holds the lens at a certain distance and in a certain posture with respect to the user's eyeball, the movement range of the line of sight that the user will actually move is taken into consideration. Thus, it is necessary to confirm whether the combination of the lens and the spectacle frame is appropriate.

  In other words, for example, there is no problem because the lens is properly prescribed, but the lens is cut according to the shape and size of the lens holding part of the spectacle frame selected as desired and incorporated into the spectacle frame, When the eyeglass user moves his / her line of sight, the line of sight may be shifted to the outside from the lens incorporated in the eyeglass frame, and as a result, the visual acuity may not be corrected.

 In such a case, it is necessary to reselect the desired spectacle frame.

 However, if the lens is cut and the cut lens is incorporated into the spectacle frame to determine the suitability of the combination of the prescription lens and the selected spectacle frame after the spectacles are completed, the already cut lens is wasted. It is a problem.

 In this way, the eyeglasses composed of the prescribed lens and the eyeglass frame that is selected as desired result in the line of sight even when the eyeglass user moves the line of sight with respect to the eyeglasses. Assists in the design of glasses by determining whether the combination of the prescribed lens and the selected spectacle frame is suitable for the spectacle user so that the eyesight is within the range of the lens. The present invention relates to an eyeglass design support apparatus.

 When newly making eyeglasses, it is necessary to select a lens specially prescribed for the new eyeglass user.

 On the other hand, the spectacle frame holds the lens in an integrated manner, and holds the lens at a fixed distance and a fixed posture with respect to the user's eyeball. In general, the eyeglass frame is selected by the user.

  That is, when newly designing glasses, the lens is determined by the prescription, but the glasses frame can be selected.

  As described above, when a spectacle user normally looks at an object, the line of sight from the eyeball changes its angle following the direction of the object, that is, the line of sight moves relative to the lens (changes the posture). ) Is performed.

 Therefore, when the direction of the line of sight changes and goes out of the range of the spectacle lens, the line of sight has not been corrected by the lens, so it is assumed that the object has been corrected by the lens for the spectacle user. It will be impossible to see.

  Therefore, when creating new glasses, a spectacle frame desired by the eyeglass user (subject to create glasses) is worn, and the subject's conscious line of sight with respect to the clerk's visual inspection and instructions from the clerk The positional relationship between the center of the lens and the spectacle frame is obtained by the movement of the lens.

  However, such a method has a problem that the degree of suitability of the lenses constituting the spectacles and the spectacle frame to the subject greatly depends on the skill level of the store clerk, and there is a large variation in the completion of the spectacles.

  Also, for the test subject, the movement of the line of sight in response to an instruction for obtaining compatibility between the lens and the spectacle frame is a strain, and as a result, the completed spectacles have a lens within the range of the normal line of sight movement. However, there was a problem that the eyesight was corrected with a narrow visual field.

  Therefore, when creating eyeglasses, it is important to know the direction of the line of sight with respect to the front vertical direction of the eyeball of the subject. On the other hand, the following patent application publication discloses a technique for objectively obtaining the behavior of the line of sight with respect to the position of the visual object regardless of the skill level of the store clerk.

Special table 2007-536043 gazette JP-T-2006-516752

  The spectacles are composed of a lens and a spectacle frame.

  The lens is specially formulated for those who use the glasses. The spectacle frame integrally holds the prescribed lens, and keeps the prescribed lens at a certain distance and in a certain posture with respect to the user's eyeball when the user wears glasses. It is.

  In order for the eyeglass user to correct his or her visual acuity with the lens, it is necessary for the eyeglass user's movable line of sight to be covered by the lens.

  In other words, the lens needs to be sized so as to cover the range of movement of the line of sight of the eyeglass user and to be held at a position that covers it.

  Patent Document 1 discloses a technique for measuring the movement of the line of sight including the movement of the head of a subject (glasses user).

  However, in order for a spectacle user to view an object with a visual acuity corrected by the lens, it is necessary for the line of sight to pass through the range of the lens. Just knowing the movement (the inclination of the line of sight) does not reveal the relative positional relationship between the line of sight and the lens. By simply measuring and grasping the movement of the line of sight, the eyeglass user always corrects the line of sight with the lens. The problem arises that it cannot be guaranteed that the object will always look good.

  On the other hand, Patent Document 2 discloses a technique for obtaining a relative position between a pupil of a subject (a spectacle user) and a spectacle frame, but the movement of the line of sight of the spectacle user and a lens cover for correcting vision. The scope to do is not disclosed.

  Therefore, the technique disclosed in Patent Document 2 can be expected to have an effect corresponding to a change in a subject's line of sight if the change is in a certain narrow range, but the subject moves the line of sight within a normal natural range. In such a case, there is no guarantee that the line of sight is always corrected by the lens, and as a result, there is a problem that it does not necessarily contribute to the design support of the glasses, that is, the support of the combination of the lens and the spectacle frame.

  The present invention has been made in view of the above circumstances, and when a new spectacle is made, the prescribed lens and the spectacle frame selected as desired move for the spectacle user. The target (the range of change in the posture of the line of sight) is taken into consideration, and even if the line of sight moves, the line of sight is corrected by the lens so that the object can be seen as a corrected image. The present invention provides a spectacle design support device that supports spectacle design that is not performed.

  The inventor of the present invention has conducted extensive research on the above-described problems, and has examined the relationship among the lens, the spectacle frame, the eyeball, and the line of sight, so that even when the spectacle user moves the line of sight, When using the lens, even if the direction of the line of sight follows the object and has an angle (tilt due to a change in posture) from the eyeball, the line of sight can be corrected by the lens. A configuration that supports the design of eyeglasses was created and the invention was completed.

  That is, first, when newly producing glasses, it is necessary to match the lens prescribed exclusively for the eyeglass user and the desired eyeglass frame.

  Specifically, when a lens is prescribed for a spectacle user and the spectacle frame desired by the spectacle user is determined, first, the lens can be adapted to the size and shape of the spectacle frame. is necessary.

  In particular, the center of the lens needs to be held at an appropriate position with respect to the spectacle frame, and the spectacle frame needs to be able to hold the lens as prescribed regardless of the lens power.

  For example, when a lens that matches a prescription is cut from a standardized lens and the spectacle frame is larger than the lens, the center of the lens has a predetermined position with respect to the user's eyeball. There are cases where it is not taken.

  In such a case, as a result, the compatibility between the lens and the spectacle frame cannot be obtained.

  On the other hand, when the prescription lens intended for use is a progressive lens, the near portion for viewing a visual target object located nearby is disposed below the center of the lens by a substantially constant distance (10 to 16 mm). ing.

  Therefore, when the vertical dimension of the lens holding frame of the selected spectacle frame is short, the vertical dimension of the lens to be used is limited to the size of the lens holding frame, and is cut and shaped. Therefore, a lens in which the near portion is cut and missing is used. Therefore, the spectacles using the lens lacking the near portion are created, and the compatibility between the lens and the spectacle frame cannot be obtained.

  Further, when viewing an actual eyeglass user, an actual eyeglass user usually looks at the object to be viewed with the line of sight dropped by about 35 degrees with respect to the horizontal line, that is, the front vertical direction of the eyeball.

  Therefore, even when it is not necessary to lose the near portion when shaping the lens, the spectacle frame of the spectacles holds the lens at a distance that is largely separated from the eyeball user's eyeball. In some cases, the line of sight dropped by approximately 35 degrees with respect to the horizon of the eyeglass user does not pass through the lens passing under the lens, that is, try to see the object through the outside of the lens. become.

  Therefore, since the line of sight in such a case is not corrected by the lens, the object cannot be visually recognized, and compatibility between the lens and the spectacle frame cannot be obtained.

  In such a case, in order to obtain compatibility between the lens and the spectacle frame, the lens holding frame is adjusted so that the visual acuity of the line of sight is corrected by the lens when the user looks at the hand with the line of sight dropped by the spectacle user. It is necessary to replace with a large spectacle frame to expand the range of correction of visual acuity by the lens, or to replace the spectacle frame with a shape in which the distance between the eyeball user's eyeball and the lens is short.

  Here, from the standpoint of adjusting the lens, if the three-dimensional relative positional relationship between the eyeball user's eyeball and the spectacle frame can be measured, the range of movement when the direction of the line of sight moves is determined. As a result, it becomes possible to design an optimum lens for the user of the spectacles.

  That is, for example, when a spectacle frame of a desired size having a lens holding frame of the spectacle frame is selected, the three-dimensional relative relationship between the eyeball of the spectacle user and the spectacle frame of the desired size of the lens holding frame is selected. Once the positional relationship is measured, the line of sight drops when looking at the hand, and it is possible to determine whether or not it is possible to design a lens with a near-use part at the position where the line of sight below it passes. Based on the above, it is possible to obtain spectacles that are compatible with the spectacle user who is the measurement target from the lens and the spectacle frame.

  Therefore, a means for measuring the relative three-dimensional positional relationship between the eyeball of the subject (a spectacle user who newly creates spectacles) and the lens holding frame of the spectacle frame, the lens holding frame is displayed as an image, and the lens holding is further performed. Means for displaying an image of a lens layout mark overlaid on a frame image, means for displaying the relative three-dimensional positional relationship, and means for printing out the lens layout mark at the same magnification. Thus, it is determined whether or not compatibility is obtained by the relationship between the lens and the spectacle frame, and a configuration for supporting spectacle design for obtaining spectacles that are corrected by the lens even when the line of sight moves is obtained.

  The relative three-dimensional positional relationship means a positional relationship between a quadrilateral circumscribing the lens (a quadrilateral contiguous to the inside of the lens holding frame of the lens frame) and the center of the lens.

  According to the present invention, a subject wearing a spectacle frame is photographed from two different directions, and based on image data obtained by the photographing, the relative positional relationship between the center of the lens and the quadrilateral circumscribing the lens, and the subject The eyeglass design support device is configured to support eyeglass design by obtaining a relative positional relationship between the eyeball and the lens.

  The detailed configuration is arranged substantially in front of the subject in the horizontal direction, and is disposed below the first camera for photographing the eyeball and the spectacle frame of the subject wearing the spectacles. A second camera for photographing the eyeball and glasses of the subject from obliquely below, a storage unit for inputting and storing image data obtained by imaging with the first camera and the second camera, and the storage Based on the image data obtained by processing the image data from the unit and the display unit displaying the processed image data obtained by processing the image data as an image, and the first camera and the second camera, respectively, A first calculation for calculating the two-dimensional coordinates of the left and right eyeballs of the subject and the three-dimensional coordinates of the left and right eyeballs of the subject based on the two-dimensional coordinates, and the first and second cameras. At least one of the second calculation for calculating the vertical coordinates of the upper and lower ends of the left and right lenses of the spectacles based on the image data obtained by imaging, and the first camera and the second camera. A third operation for calculating the horizontal coordinates of the right and left ends of the left and right lenses of the glasses obtained by imaging, and a result of the first operation, a result of the second operation, and a result of the third operation Based on the results, a fourth calculation for calculating the three-dimensional coordinates of the quadrilateral circumscribing the left and right lenses of the glasses, the three-dimensional coordinates of the left and right eyeballs of the subject as a result of the first calculation, and the fourth Based on the three-dimensional coordinates of the quadrilateral circumscribing the left and right lenses of the glasses, which are the results of the above calculation, the coordinates of the center position of the lens, the relative positional relationship of the circumscribed quadrilateral of the lens, and the Calculate the positional relationship When the first camera and the second camera capture images, the image data from the two cameras is stored in the storage unit, and the first calculation is performed in the calculation unit. A spectacle design support apparatus that includes a control unit that performs the fifth calculation and controls the display unit to display the result of the fifth calculation.

  In addition, the said control part overwrites the circle of the desired radius centering on the coordinate corresponding to the center position of a lens with respect to the image imaged with the said 1st camera, and can be displayed on the said display part When the operator finds the minimum radius that includes the lens portion of the eyeglass by visual observation, the operator calculates the actual radius based on the three-dimensional lens position. There is a configuration in which the size is converted into a size, and the control is performed so that the diameter of the minimum lens necessary for manufacturing the lens is calculated and output.

  Further, in the spectacle design support device, the control unit additionally adds the position of the eyeball when the position of the eyeball of the subject and the position / size / angle of the lens are drawn on a view of the spectacles viewed from the lateral direction. In other words, there is a configuration in which control is performed so as to draw and display on the display unit so as to cross the lens in the direction of the maximum angle of the range in which the line of sight moves (the range of the line of sight inclination).

  In the eyeglass design support device, and further in the eyeglass design support device including the control unit that performs the above-described control, an operation is performed when an image from the first camera and / or the second camera is displayed on the display unit. When the operator designates each coordinate, the control unit is configured such that the first computation, the second computation, and the third computation of the computing means are performed based on the value of each coordinate designated by the operator. Can be mentioned.

  Further, when the above-mentioned arithmetic unit is provided with a layout mark in which the center of the lens given in advance and the near position of the progressive lens are shown in a two-dimensional diagram, the center between the three-dimensional lenses of the left and right lenses is prepared. The calculation function for generating one two-dimensional lens mark image in which the left and right layout marks are drawn based on the distance of the layout mark and the scale ratio of the layout mark, and the center position of each three-dimensional lens of the left and right lenses The camera coordinates are converted to the center coordinates of the lens in the image, the first camera image is expanded and contracted and translated to match the center position of the two lenses in the two-dimensional lens mark image, and the two-dimensional face is obtained. An arithmetic function for generating an image is provided, and the control unit includes a control unit that controls the display unit to synthesize and display a two-dimensional face image and a two-dimensional lens mark image. .

  According to the present invention, when a new pair of glasses is created, the user (subject) of the new glasses sets the direction of the line of sight with respect to the front horizontal direction based on image data obtained by wearing a glasses frame. Even if it is changed, it is configured to discriminate whether or not the lens covers the range to correct the line of sight at that time, so that it is desired for the prescribed lens without requiring special skill. This is a spectacle design support device that can easily and reliably determine whether a spectacle frame is appropriate.

It is composition explanatory drawing explaining the whole structure at the time of using embodiment of this invention with respect to a test subject. It is a structure explanatory drawing explaining the structure of operation performed with respect to the image displayed on the display part in the process at the time of measuring the three-dimensional coordinate of a test subject's eyeball using the apparatus shown in FIG. FIG. 2 is a configuration explanatory diagram illustrating a configuration for measuring an image displayed on a display unit when a range of a lens of a spectacle worn by a subject is replaced with a quadrilateral using the apparatus illustrated in FIG. 1. FIG. 4 is an explanatory diagram schematically illustrating the positions of four corners of the quadrilateral when the quadrilateral showing the range of the left and right lenses shown in FIG. 3 is looked down from above. FIG. 5 is a configuration explanatory diagram schematically illustrating that correction is performed by rotation with respect to the positional relationship of the schematic quadrilateral that indicates the range of the left and right lenses illustrated in FIG. 4. FIG. 3 is a configuration explanatory diagram illustrating a configuration of rotation correction for an XZ coordinate system for position data of left and right lenses obtained by the camera of the apparatus illustrated in FIG. 1. It is a structure explanatory drawing explaining the structure of how to obtain | require the relative position of the right and left eyeball with respect to the circumscribed quadrilateral which concerns on a right and left lens using the apparatus shown in FIG. FIG. 2 is a configuration explanatory view for explaining a method of obtaining a relationship between a desired spectacle frame and a position and a diameter of a lens when creating new spectacles using the apparatus shown in FIG. 1. FIG. 2 is a schematic front view schematically showing a configuration when viewing spectacles from the front when parameters relating to the spectacle frame and the lens are obtained using the apparatus shown in FIG. 1. FIG. 2 is a schematic side view schematically showing a configuration when the eyeglasses are viewed from the side when the parameters relating to the eyeglass frame and the lens are obtained using the apparatus shown in FIG. 1. In order to determine whether or not the near portion of the eyeglass lens to be created is within the lens holding portion of the eyeglass frame, the left and right images of the image by the first camera of the apparatus shown in FIG. It is a configuration explanatory view for schematically explaining a state in which a layout mark and a near portion are overlaid on a lens. FIG. 4 is a configuration explanatory diagram for explaining the determination of the position of the peripheral edge of a lens using a radial or diametrical line segment centered on an eyeball in order to obtain custom-made lens data. FIG. 4 is a configuration explanatory diagram for explaining that a position of a peripheral portion of a lens is determined using a computer mouse in order to obtain data on a custom-made lens.

  A mode for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited by this form.

  As shown in FIG. 1, the eyeglass design support device 1 includes a first camera 2, a second camera 3, a storage unit 4, a display unit 5, a calculation unit 6, a control unit 7, and an operation unit. 8, a feeding means 9, a line-of-sight guidance marker 10, and an illumination unit 11.

  The first camera 2 has a distance of about 0.4 to 1.0 meters in front of the eyeball E of the subject A when the subject A who intends to newly make glasses S arrives at a fixed position for examination. The eyeball E of the subject wearing the eyeglasses S and the eyeglass frame F of the eyeglasses S wearing the eyeglasses S are preferably provided so as to be positioned forward by 0.6 meters. Shooting in color.

  The second camera 3 is disposed substantially vertically below the first camera 2 by 0.2 to 0.3 meters, and photographs the eyeball E and glasses S of the subject in color from obliquely below. .

  Here, when the subject A is located at the fixed position for the inspection, specifically, when the subject is seated at a position where the horizontal distance and the height position are predetermined with respect to the spectacle design support device 1, the second camera 3 is subject to the subject A. The eyeball E is adjusted by relative movement of the main body of the eyeglass design support device 1 and the subject A so that the eyeball E becomes a substantially fixed position set in advance (for example, the center height position of imaging).

  The first camera 2 and the second camera 3 are configured to shoot in color. However, color shooting is performed so that an image obtained by shooting using the two cameras can be more easily recognized. However, monochrome shooting may be used as long as it is sufficiently visible.

  The second camera 3 can be moved in an arc shape (in the direction of arrow B) by the feeding means 9 about the eyeball E of the subject A.

  Although not shown in the drawing, the feeding means 9 is provided with a pinion gear attached to the second camera 3 and disposed on the moving side, an arc-shaped rack gear meshing with the pinion gear, It is constituted by an arc feed mechanism provided with a geared motor for driving the pinion gear.

  Accordingly, the second camera 3 moves in an arc shape around the eyeball E of the subject A who is in the fixed position for examination by the feed control from the control unit 7 to the geared motor, and as a result, the subject A Therefore, it is configured to move in the vertical direction.

  The storage unit 4 records video data of videos taken by the first camera 2 and the second camera 3.

  In addition, the storage unit 4 can also store processed processed data obtained by calculating the video data by the calculation unit 6.

  The display unit 5 displays the image data from the storage unit 4 and the processed image data obtained by calculating and processing the image data stored in the storage unit 4 with the calculation unit 6 as an image.

  The display unit 5 further displays the functional state of the eyeglass design support device at the present time, the operation content from the operation unit 8 and the like.

  Based on the image data from the storage unit 4, that is, based on the image data obtained by photographing with the first camera 2 and the second camera 3, the calculation unit 6 calculates the left and right eyeballs Er and El of the subject A. The first calculation for calculating the three-dimensional coordinates of the left and right eyeballs E of the subject A based on the two-dimensional coordinates and the two-dimensional coordinates, and the vertical coordinates of the upper and lower ends of the left and right lenses Lr, Ll of the glasses S The second calculation to be calculated is performed.

  The calculation result obtained by the calculation by the calculation unit 6 is stored in the storage unit 4.

  The calculation unit 6 is based on the image data from the storage unit 4, that is, based on the image data obtained by being picked up by at least one of the first camera 2 and the second camera 3. Left and right lens Lr. A third calculation for calculating the horizontal coordinates of the right end and the left end of Ll is performed.

  The calculation unit 6 is a quadrilateral three-dimensional coordinate circumscribing the left and right lenses Lr and Ll based on the result of the first calculation, the result of the second calculation, and the result of the third calculation. The fourth calculation for calculating is performed.

  Note that an octagon closer to the shape of the lens may be used instead of the quadrilateral.

  Further, the calculation unit 6 calculates the coordinates of the center position of the lens L based on the three-dimensional coordinates of the subject A that is the result of the first calculation and the three-dimensional coordinates of the lens L that is the result of the third calculation. The fifth calculation for calculating the relative positional relationship of the circumscribed quadrilateral of the lens L and the positional relationship between the eyeball E and the lens L is performed.

  When imaging is performed by the first camera 2 and the second camera 3, the control unit 7 stores the image data from the two cameras 2 and 3 in the storage unit 4, and causes the calculation unit 6 to store the first data. Control is performed so that the calculation to the fifth calculation are performed, and the result of the fifth calculation is displayed on the display unit 5.

  Further, the control unit 7 shoots the first camera 2 and the second camera 3 based on the instruction content from the operation unit 8, the display function of the display unit 5, the calculation function of the calculation unit 6, and the sending means 9. Control of ON / OFF of the feed function, the output of the line-of-sight guidance marker 10 and ON / OFF of the illumination unit 11 is performed.

  The operation unit 8 is an input unit for an operator to operate the function of the eyeglass design support device 1, and the operation content (instruction content) is sent to the control unit 7.

  The operation unit 8 is a specific example of the eyeglass design support device 1, which is a keyboard and a computer mouse (both not shown).

  The calculation unit 6 is a computer connected to the keyboard and the computer / mouse, and the storage unit 4 is a storage unit of the computer or an external storage unit.

  The line-of-sight guidance marker 10 is disposed in the vicinity of the first camera 2 and is for guiding the line of sight of the subject A in its own direction.

  Therefore, when the subject A is guided by the line-of-sight guidance marker 10 and turns his / her line of sight, the line of sight is directed substantially toward the first camera 2.

  The line-of-sight guidance marker 10 is light that becomes a point.

  However, when the subject A can easily point his / her line of sight toward the first camera 2, the line-of-sight guidance marker 10 is not necessary or even if the line-of-sight guidance marker 10 is provided. .

  The illumination unit 11 includes a brightness sensor (not shown) that senses the brightness of the usage environment of the spectacle design support device 1 at that time, and based on the detection result of the brightness sensor, the spectacle design support device 1 When functioning, the illumination is given so that the use environment has a suitable brightness.

  However, if the spectacles design support apparatus 1 is made to function, that is, if the brightness of the use environment is suitable for measurement and operation, the illumination unit 11 is not necessary or needs to be used even if the illumination unit 11 is provided. There is no.

  The whole and each part of the spectacles design support apparatus 1 are configured as described above. Below, the function of the spectacles design support apparatus 1 is demonstrated, explaining the detailed function structure of each part.

  A subject A (glasses user) who wants to make glasses S newly sits at a predetermined position in which the first camera 2 is almost at the eye level and in front.

  Here, the operator (inspector) operates the output from the operation unit 8 to the illumination unit 11 so that the brightness of the usage environment of the spectacle design support device 1 at this time becomes a suitable brightness. The control unit 7 receives the operation signal from the operation unit 8 and sends a control signal to the illumination unit 11 so that the brightness is suitable for the current use environment of the eyeglass design support device 1.

  When the illumination unit 11 receives the control signal from the control unit 7, the illumination unit 11 measures the brightness of the usage environment of the spectacle design support device 1 with the brightness sensor, and the measurement value and the appropriate brightness in advance. The set values are compared, and the illumination is output so as to obtain a preset suitable brightness.

  Next, the operator, after the subject A has arrived at the fixed position for examination and confirming the subject A to start the examination, causes the subject A's line of sight to be guided substantially in the direction of the first camera 2. An operation for outputting the line-of-sight guidance marker 10 is performed by the operation unit 8.

  The operation unit 8 sends a signal that causes the control unit 7 to output the line-of-sight guidance marker 10. The control unit 7 receives a signal from the operation unit 8 and sends a control signal for outputting to the line-of-sight guidance marker 10.

  Here, the line-of-sight guidance marker 10 receives a control signal from the control unit 7 and lights point light for line-of-sight guidance in green.

  When the line-of-sight guidance marker 10 turns on the green point light, the subject A directs his / her line of sight to the point light, so that the center of the eyeball E of the subject A is almost on the optical axis of the lens of the first camera 2. In other words, the line of sight of the subject A and the optical axis of the lens of the first camera 2 are almost on board.

  Here, after the operator confirms that the eyeball E of the subject A is in such a state, the first camera 2 and the second camera 3 from the operation unit 8 touch the face of the subject A in that state. Perform operations for shooting.

  When the operation unit 8 receives a signal for a photographing operation from the operator, the operation unit 8 sends a signal to that effect to the control unit 7. The control unit 7 sends a control signal to the first camera 2 and the second camera 3 so as to perform photographing.

  Here, the first camera 2 and the second camera 3 photograph the face of the subject A.

  At the time of this photographing, the image of the subject A of the first camera 2 is displayed on the display unit 5 as a monitor image.

  The operator confirms whether or not the subject A is photographed as predetermined by looking at the monitor imaged on the display unit 5. If the photographing has not been performed as predetermined, the predetermined photographing of the subject A is obtained by performing the photographing again.

  In addition, because of the configuration of the eyeglass design support device 1, it is not necessary to confirm the image capturing by the second camera 3 as long as there is no problem in confirming the monitor image capturing by the first camera 2. .

  When shooting by the first camera 2 and the second camera 3 is performed, the image data D1 and D2 of the shooting related to the shooting are stored in the storage unit 4 as data.

  Hereinafter, measurement of the three-dimensional coordinates of the eyeball E of the subject A and the spectacle frame F of the spectacles S will be described.

First, the relationship between the actual point P and the positions of the cameras 2 and 3 on the image will be taken up.
Since the results photographed by the first camera 2 and the second camera 3 are displayed as images on the display unit 5, the operator operates the operation unit 8 on the displayed images to The position of the eyeball Ea on the image and the position of the eyeglass frame Fa on the image are acquired as two-dimensional values (values in the xy coordinate system).

  Note that the subscript a indicates that it is displayed as an image on the display unit 5 below.

  Here, the image displayed on the display unit 5 is actually two-dimensional, but consider it as three-dimensional. For the points of the image by the first camera 2 and the second camera 3 with respect to the actual point P (X, Y, Z) on the three-dimensional (value in the xyz coordinate system), the xy coordinate system is used. Are the coordinates (x1, y1) and coordinates (x2, y2), respectively.

  On the other hand, since the first camera 1 and the second camera 3 have parallax in the vertical direction (y direction), the following relationship is established, that is, they can be handled as a function.

Z = f (y1, y2)
X = g (x1, y1, z)
Y = h (x1, y1, z)
Here, f (), g () and h () mean functions for x, y and z, not coordinates. A group of these three formulas is represented by formula (1).

  On the other hand, these three equations are transformed, and the coordinates (x, y) of the image by the camera are determined by the actual point P (X, Y, Z). Therefore, considering the functionalization, the following equations are given: .

x = u (X, Y, Z)
y = v (X, Y, Z)
Here, u () and v () mean functions for X, Y, and Z, not coordinates. The group of these two formulas is represented by formula (2).

  Next, measurement of the three-dimensional coordinates of the eyeball E of the subject A will be described.

  First, the eyeball Ea on the image captured by the camera is performed by operating the operation unit 8 with respect to the left and right eyeballs Era and Ela displayed on the display unit 5 for ease of processing.

  Specifically, circular marks Mr and Ml are displayed on the display unit 5 by operating the operation unit 8, and then the operation unit 8 (specifically, a computer mouse) is operated to display the circular marks. Mr, Ml are the black eye portions Ira. Of the left and right eyeballs Era, Ela on the image of the display unit 5. It moves to Ila and matches the size of the outer periphery of the black-eye portions Ir and Il of the left and right eyeballs Era and Ela (see FIG. 2).

  Here, the coordinate value on the image is measured for each of the left and right eyeballs Era and Ela of the subject A displayed on the display unit 5.

  The coordinate values obtained here are substituted into the formulas for X, Y, and Z described above to obtain three-dimensional coordinate values.

  That is, in the example shown in FIG. 2, both eyes of the subject A are at a short distance of about 60 cm with respect to the first camera 2, and both eyes of the subject A are at the same close distance as the first camera 2. Since a certain gaze guidance marker 10 is consciously viewed as if it is located in the forward direction, the left and right eyes are closer to each other than the normal natural state, so-called crossed eye state. Therefore, it is necessary to correct the positions of both eyes Era and Ela obtained so that the left and right eyes are in a normal natural state outward along the X axis (horizontal direction).

  The amount of correction in the outward direction of both eyes is calculated by the calculation unit 6 based on the average diameter of the eyeball E and the distance from the eyeball E to the line-of-sight guidance marker 10 (measured value Z).

  Next, measurement of the three-dimensional coordinates of the spectacle frame F will be described.

  Since it is meaningful for the subject A to be corrected by the lens of the glasses S, the inside of the glasses frame F is measured as the maximum range in which the lens performs the function of correcting the eyeball E.

  In the case of spectacles without spectacle frame F called so-called edgeless spectacles, or in the case of spectacles having a configuration in which a part of spectacle frame F is missing, the outer circumference of the lens to be used is measured. .

  The operator operates the operation unit 8 to specify the left and right inner sides of the eyeglass frame Fa of the image displayed on the display unit 5 or the outer periphery of the left and right lenses Lra and Lla, that is, specifically the computer mouse. By operating and slidingly aligning the horizontal line and the vertical line on the image of the spectacle frame Fa on the display unit 5, the y-coordinate of the upper side, the y-coordinate of the lower side, the x-coordinate of the right side, and the x-coordinate of the left side, respectively. Is designated (see FIG. 3).

  When measurement is performed by designating the position of this coordinate, the y coordinate of the upper side and the y coordinate of the lower side are obtained by both the first camera 2 and the second camera 3 in order to obtain data for calculating the Z coordinate. It is necessary to measure. That is, the Z coordinate is obtained by the calculation of the triangle formed by the spectacle frame Fa, the first camera 2 and the second camera 3.

  At this time, the x coordinate on the right side and the x coordinate on the left side of the spectacle frame Fa are measured by both the camera 1 and the camera 2. This is to obtain higher accuracy, and the measurement in the xy coordinate system may be based on the imaging of only the first camera 2. The right lens of the image on the display unit 5 based on the first camera 2 is determined by the intersection p (see FIG. 3) of the upper side, the lower side, the left side, and the right side, which are positioned as described above, that is, determined by these four sides. The coordinates of the four corners of the quadrilateral are obtained (eight points p1 to p8 for the left and right lenses Lra and Lla).

  By substituting the value of the coordinates of each point p obtained here into the above equations for X, Y and Z, the three-dimensional coordinates of the four corners of the quadrilateral can be obtained.

  On the other hand, depending on the spectacles, there may be a case where there is a difference in the position in the forward direction of the line of sight between the right lens and the left lens, that is, there is a difference in the value of Z. In this case, coordinate conversion described below needs to be performed.

  That is, specifically, the difference in the Z direction between the center position of the quadrilateral related to the right lens and the center position of the quadrilateral related to the left lens is obtained, and based on this difference, four of the quadrilateral related to the right lens are obtained. The Z coordinate of each corner and the Z coordinate of each of the four corners of the quadrilateral related to the left lens are corrected by proportional distribution.

  By this correction, the quadrangle related to the right lens and the quadrangle related to the left lens are located on the same plane, and as a result, the right lens and the left lens are located on the same plane.

  On the other hand, except for special cases, when making eyeglasses, the right lens Lr and the left lens Ll are generally equal in size, and the angles in the Y-axis direction with respect to the XY plane are equal.

  Therefore, when the right lens Lra and the left lens Lla do not have such a relationship in the display unit 5, the size and the angle in the Y-axis direction with respect to the XY plane are corrected for the right lens Lra and the left lens Lla. There is a need to.

  In order to perform correction by averaging, it is necessary to obtain the x coordinates of the left and right sides of the image by the second camera 3. Further, the image of the second camera 3 needs to be converted according to the equation (1).

  Here, the right lens Lr and the left lens Ll are both equal in size and have the same angle in the Y-axis direction with respect to the XY plane and do not appear on the display unit 5. Can be considered to be shifted in the Z direction.

  Therefore, assuming that the right lens Lra and the left lens Lla appearing on the display unit 5 are shifted in the Z direction, the case where the right lens Lra and the left lens Lla are viewed from above is considered, that is, on the XZ plane. Correction is performed on the right lens Lra and the left lens Lla.

  Here, since the correction work is complicated when the lens itself is handled, the quadrilateral determined by the outer periphery of the lens obtained above is considered.

  In addition, since the lens L held integrally with the spectacle frame F is generally positioned so that the upper side protrudes forward and the lower side recedes, the quadrangular intersections p1 to p8 circumscribing the lenses Lra and Lla are used. When schematically represented, the positions shown in FIG. 4 are taken.

  In the example shown in FIG. 4, the lens Lra protrudes forward and the lens Lla moves backward, but the same can be applied to the opposite case.

  First, the center of the quadrangle related to the lens Lra and the center of the quadrangle related to the lens Lla are connected by a straight line. Subsequently, rotation correction is performed by matching the directions of the lenses Lra and Lla with the direction of the straight line (see FIG. 5).

  Here, rotation correction of the lens Lra, the lens Lla, and the frame Fa holding these lenses Lra, Lla is obtained.

  Hereinafter, an operation for correcting the shape of the frame Fa will be described.

  In the normal spectacle frame F, the right lens Lr and the left lens Ll are regarded as a specific angle in the X-axis direction with respect to the XY plane, that is, the shape of the face portion on which the spectacles S are worn, as a spherical surface. Specifically, for example, it has an angle of approximately 175 degrees. Therefore, in order to obtain an accurate three-dimensional spectacle frame F based on a two-dimensional image, correction is performed on the data of the two-dimensional image. It is necessary to do.

  This correction is performed by the operator by performing an input operation on the calculation unit 6 via the operation unit 8.

  As shown in FIG. 6, the specific measurement of the specific angle is performed with the spectacle frame F standing on a straight plane, that is, the lenses Lr and Ll are substantially placed on the plane. This is done by standing up and looking down vertically downward, and reading the angles of the two lens holding frames of the eyeglass frame F and the straight line drawn on the plane at that time.

  To read this angle, a protractor may be used, or a dedicated sheet with a straight line drawn on the plane as a reference line and an auxiliary line indicating the angle may be used as the reference line.

  The true shape of the frame F is corrected by reading this specific angle and subsequently inputting the read value to the calculation unit 6.

  Here, the left and right lenses Lr. The circumscribed quadrilateral according to L1 can be obtained with three-dimensional coordinates corrected in the X-axis direction with respect to the XY plane.

  The relative positions of the left and right eyeballs Er and El with respect to the circumscribed quadrilaterals related to the left and right lenses Lr and Ll of the three-dimensional coordinates corrected in the X-axis direction with respect to the XY plane are obtained.

  As shown in FIG. 7, first, the left and right eyeballs Er and El and the corresponding lenses Lr and Ll are compared with each other in order to obtain the relative positions of the left and right eyeballs Er and El with respect to the circumscribed quadrilateral relating to the left and right lenses Lr and Ll. Correction is performed so that the distances in the Z direction are equal.

  This is because when the first camera 2 performs the above photographing, there is no problem if both eyes of the subject A are aligned and facing the front vertical direction, but even if the line of sight faces the front, This is because if the posture is tilted in the X-axis direction, the positions of the left and right eyeballs in the Z-axis direction (the original forward direction for the subject) need to be corrected.

  Here, when correction is performed on the positions of the left and right eyeballs Er and El in the Z direction, the intersection of the line-of-sight direction obtained by this correction and the plane of the lenses Lr and Ll becomes the center of the lenses Lr and Ll.

  However, there are many cases where the person being measured, that is, the person who intends to make the glasses S has a unique habit. In such a case, even if the surface of the subject A is slightly inclined with respect to the front vertical direction, if it is customary to look at the object with the line of sight facing forward, the surface X as described above There is no need to correct the tilt of the axial orientation.

  Next, measurement of the diameter required for the lens to be used will be described below. In other words, the lens can be adjusted in advance according to the visual acuity of the subject A, but the visual acuity needs to be reliably corrected by the adjusted lens.

  However, the lens Lr. If the diameter of Ll is small, the user (subject A) changes the direction of the line of sight following the object to be viewed and avoids a situation in which the user passes through the outside of the lenses Lr and Ll and is not corrected by the lenses Lr and Ll. It is to do.

  In such a situation, there is no problem as long as the lenses Lr and Ll held in the spectacle frame F are within the range of movement in the direction of the line of sight of the user and fall within the minimum diameter lenses Lr and Ll.

  However, the lenses Lr and Ll for spectacles generally have a maximum diameter determined according to the power involved in correcting vision.

  Therefore, a minimum diameter that is within the determined diameter range and within which the line of sight of the user (subject A) of the new glasses can correct the visual acuity by the lenses Lr and Ll is obtained. The vision will be corrected.

  As shown in FIG. 8, the operation unit 8 is operated on the image captured by the first camera 2 and displayed on the display unit 5, specifically, the computer mouse is operated to display the image. By designating the position with the cursor, a circle that overlaps the inside of the lens holding frame of the spectacle frame F (the holding portion of the lenses Lra and Lla) is drawn.

  Here, the diameter of this circle is changed, and the circle with the largest diameter in which the circle and the inside of the lens holding frame of the spectacle frame F overlap is obtained.

  The coordinates of the center of the circle determined at this time are the positions obtained by converting the lens center coordinates obtained above into the coordinates of the first camera 2.

  Here, since it is possible to define that the four rectangular three-dimensional coordinates of the quadrilateral inscribed in the lens holding frame are known and on the plane, the diameter of the circle of the coordinate system related to the image is set to the three-dimensional coordinate system. It is possible to convert to a diameter at.

  Therefore, the calculation unit 6 calculates the lens L system in the three-dimensional coordinate system.

    Hereinafter, calculation of various parameters relating to the lens L will be described.

  In the right lens Lr and the left lens Ll of the spectacles S, as shown in FIGS. 9 and 10, respectively, the horizontal length of the lenses Lr, Ll, the vertical length, and the center between the lenses Lr, Ll. The distance is calculated and displayed on the display unit 5.

  Here, since the operator can know various parameters related to the lenses Lr and Ll as specific numerical values, the lens to be used based on the prescription is a lens normally manufactured by a manufacturer. Is it possible to use it? If the lens is a progressive lens, whether the near line of sight is within the downward range of the line of sight, for example, within 35 degrees with respect to the front horizontal direction? It becomes possible to confirm.

  Note that 35 degrees means that when the subject visually recognizes an object positioned below in the sitting posture, the head is directed downward with respect to the body, and in addition, many people when the line of sight is directed downward. Is the maximum likelihood value of the maximum angle that can be taken. That is, it is a measured value.

  Therefore, an angle indicating the downward range of the line of sight may be selected as desired.

  If the lens to be used is normally manufactured by the manufacturer, it cannot be used in this confirmation work, that the lens is a progressive lens and the near line of sight is in the front horizontal direction. On the other hand, if it is found that the angle does not fall within 35 degrees below, by changing to another lens or changing to the spectacle frame F, a lens that matches the user's vision correction and is desired. In addition, the eyeglass frame F is configured to provide eyeglasses S that are corrected even if the posture of the user's line of sight changes.

  Further, in the case of a lens with a positive power (convex lens), it is possible to easily select a lens that is as thin and light as possible by ordering a lens that has the smallest possible lens diameter.

  Next, the spectacle frame F and the lens layout marks Mr and Ml are drawn on the image of the first camera 2.

  As shown in FIG. 11, in the state where the spectacle frame F is displayed on the image on the display unit 5 by the first camera 2, the operation unit 8 is operated at the same position as the center position of the lens to operate the lens layout mark Mr, Ml is drawn and displayed.

  Since the difference between the x coordinate of the coordinate system related to the two-dimensional image of the left eye El and the right eye Er and the difference of the X coordinate related to the three-dimensional coordinate system are proportional to each other, the image of the eyeglass frame F by the first camera 2 is displayed. When the lens layout marks Mr and Ml are overwritten with a certain size after being drawn in a stretched manner, the difference in the X coordinate according to the three-dimensional coordinate system corresponds to the stretch.

  Specifically, when there is the same X coordinate difference in the three-dimensional coordinate system, if there is an eye at a distant position, the difference in the x coordinate appears small between distant positions in the two-dimensional image coordinate system. Therefore, when the image is enlarged and drawn, the image is displayed as an image having a size (length) corresponding to the three-dimensional coordinate system.

  Here, the position designated as the center should not be the position of the eyeballs Era and Ela, but the center position of the lenses Lra and Lla.

If the coordinates of the center position of the three-dimensional lens are converted by equation (2), they can be converted into two-dimensional image coordinates. Instead of the position of the eyeballs Era and Ela, the center position value of the lens Lra and Lla having the above-mentioned diameter is used for expansion and contraction and translation, and the size is the same as the actual dimension, that is, the layout mark Mr, Make the same size as Ml.
The operator confirms the image thus obtained to determine whether the near portion (small circle marks Nr, Nl in the image example) is within the lens holding portion of the spectacle frame Fa. It can be performed.

  Similarly, by optimally drawing layout marks Mr and Ml at a plurality of different positions of the lenses Lra and Lla, the optimum lenses Lr and Ll can be selected and provided.

  Furthermore, by drawing the layout marks Mr and Ml on the lenses Lra and Lla, as a result, it is easy to visually check the distortion of the spectacle frame F and the balance between the spectacle frame F and the eyes Er and El.

  For example, in FIG. 11, it can be easily seen visually that the lens holding part of the spectacle frame Fa of the left eyeball Ela is raised and the lens holding part of the spectacle frame Fa of the right eyeball Era is lowered.

  Next, a diagram of various parameters relating to the lens displayed on the display unit 5 and an image of the spectacle frame Fa with the layout marks Mr and Ml attached to the lenses Lra and Lla are printed in actual size on paper, so-called etc. Print out at double.

  Here, if the printout is performed at the same magnification, the lenses Lra and Lla displayed on the display unit 5 are displayed on the paper with the actual size and the like, so confirmation is required when processing the lenses Lr and Ll. It is possible to produce an easy and error-free instruction book.

  In the following, the creation of a custom-made lens will be described.

  In other words, what has been described above is that the length of the lens in the lateral direction is based on the premise that the optimal lens is selected from the existing lens group that has been manufactured according to the lens that the manufacturer frequently uses. The positional relationship between the length in the vertical direction and the center of the lens and the positional relationship between the near portion and the spectacle frame F and the eyeball E have been measured and illustrated.

  However, if desired or necessary, the lens cannot be used because it is not an optimal lens among the existing lens groups, and the lens may have to be specially ordered. In such a case, by obtaining the three-dimensional shape of the peripheral portion of the lens L with respect to the eyeball E, it is possible to create a custom-made lens that is optimal for the subject A (the user of new glasses). It is.

  As shown in FIG. 12, the position of the peripheral portion of the lens Lra is on a straight line extending in the radial direction or the diametrical direction from the center of the lens Lra, and a plurality of intersections with the lens holding portion of the spectacle frame Fa are operated portions. This is obtained by instructing with the computer mouse 8 (the crossing point of the cross in the figure indicates the indicating point).

  Such a method has an effect that the operation can be easily performed because the computer mouse of the operation unit 8 follows the indication point located on the line where the indication point extends in the radial direction or the diameter direction. Yes.

  Note that the position of the peripheral edge of the lens Ll can be obtained by a similar method.

  In addition, as shown in FIG. 13, there is a method for instructing the lens Lra by drawing by drawing an arbitrary number of points with a computer mouse by operating the operation unit 8. .

  In this method, since it is possible to measure densely in a portion having a large curvature, measurement with high reproducibility can be obtained even with a relatively small number of points.

  Note that the lens Ll can be similarly obtained by such a method.

  Subsequently, based on the coordinates (x, y) of the designated two-dimensional coordinate system of each point, conversion to the real coordinate system is performed using Expression (1). In this conversion calculation, the distance Z in the horizontal front direction can be calculated by giving the Z value of the plane of the lens.

  That is, if a coordinate value is given in an image by only the first camera 2, the three-dimensional coordinates of each indicated point can be calculated.

  Therefore, based on the coordinate value of each point instructed, by converting and outputting to the coordinate system having the positions of the eyeballs Era and Ela as the origin, 3 of the peripheral portions of the lenses Lra and Lla with respect to the eyeballs Era and Ela are output. It is possible to obtain dimensional coordinates.

  Therefore, based on the three-dimensional coordinate data obtained here, it is possible to easily and reliably design and manufacture a custom-made lens optimum for the subject.

   As a result, it is optimal for the subject, and it is possible to produce a custom-made lens that is simple and reliable, so that the creator (subject) of the new spectacles has spectacles composed of lenses that meet the desired frame and prescription. Can be easily and reliably obtained.

  As described above, the eyeglass design support device 1 tracks the observation object even if the line of sight of the subject A who intends to newly create eyeglasses moves, that is, the line of sight tilts with respect to the forward direction of the eyeball E. However, since it is possible to determine the shape of the eyeglass frame, the size of the lens holding frame, etc. so that the line of sight at that time is covered and corrected by the prescribed lens, no skill is required In addition, it is possible to easily and reliably create the spectacles S including the combination of the prescribed lenses Lr and Ll and the desired spectacle frame F.

Claims (6)

A first camera that is disposed substantially in front of the subject A in a horizontal direction and that captures an eyeball and a spectacle frame of a subject wearing spectacles;
A second camera that is disposed below the first camera and photographs the eyeball and glasses of the subject from obliquely below;
A storage unit for inputting and storing image data obtained by imaging with the first camera and the second camera;
A display unit that displays image data from the storage unit and processed image data obtained by processing the image data as an image;
The two-dimensional coordinates of the left and right eyeballs of the subject A based on the image data obtained by the first camera and the second camera, respectively, and the three-dimensional of the left and right eyeballs of the subject A based on the two-dimensional coordinates. Based on the first calculation for calculating the coordinates and the image data obtained by imaging with the first camera and the second camera, the upper and lower coordinates of the upper and lower ends of the left and right lenses of the glasses are calculated. A third calculation for calculating horizontal coordinates of the right and left ends of the left and right lenses of the glasses obtained by imaging by at least one of the first camera and the second camera; A fourth calculation that calculates three-dimensional coordinates of a quadrilateral circumscribing the left and right lenses of the glasses based on the result of the first calculation, the result of the second calculation, and the result of the third calculation; Based on the three-dimensional coordinates of the left and right eyeballs of the subject A as a result of the first calculation and the three-dimensional coordinates of a quadrilateral circumscribing the left and right lenses of the glasses as a result of the fourth calculation, A calculation unit for performing a fifth calculation for calculating the position coordinates, the relative positional relationship of the circumscribed quadrilateral of the lens, and the positional relationship between the eyeball and the lens;
When imaging is performed by the first camera and the second camera, the image data from the two cameras is stored in the storage unit, and the calculation unit performs the first to fifth calculations. And a control unit that controls to display the result of the fifth calculation on the display unit;
An eyeglass design support apparatus comprising:   The control unit is capable of overwriting an image obtained by imaging with the first camera with a circle having a desired radius centered on coordinates corresponding to the center position of the lens and displaying the circle on the display unit. When the function is provided in the calculation unit, when the operator visually determines the minimum radius including the lens unit of the glasses, the calculation unit actually calculates the calculated radius based on the three-dimensional lens position. The spectacles design support apparatus according to claim 1, wherein the control is performed so that the minimum diameter of the lens necessary for manufacturing the lens is calculated and output.   The control unit traverses the lens in the direction of the maximum line-of-sight angle from the eyeball position when the eyeglass position and the lens position, size, and posture angle are superimposed on the image of the eyeglasses viewed from the lateral direction. The spectacles design support apparatus according to claim 1, wherein control is performed so that the display unit draws and displays the display.   When the operator designates each coordinate when an image obtained by imaging with the first camera and / or the second camera is displayed on the display unit, the control unit The spectacles design according to any one of claims 1 to 3, wherein control is performed such that the first calculation, the second calculation, and the third calculation are calculated based on the values of the coordinates specified by the operator. Support device.   When the layout mark which shows the center of the lens given beforehand and the near position of the progressive lens in a two-dimensional diagram is prepared, the calculation unit calculates the distance between the centers of the three-dimensional lenses of the left and right lenses. An arithmetic function for generating one two-dimensional lens mark image in which left and right layout marks are drawn based on the scale ratio of the layout mark, and the center position of each of the three-dimensional lenses of the left and right lenses are coordinates of the first camera To obtain the center coordinates of the lens in the image and generate the two-dimensional face image by moving the first camera image in parallel to expand and contract so as to coincide with the center position of the two lenses in the two-dimensional lens mark image A spectacle lens, wherein the control unit controls the display unit so that a two-dimensional face image and a two-dimensional lens mark image are combined and displayed on the display unit. Apparatus according to claim 1 to perform the selection and design support. A first camera that is arranged substantially in front of the subject in a horizontal direction and that captures an eyeball of a subject wearing spectacles and a spectacle frame of the spectacles;
A second camera that is disposed below the first camera and photographs the eyeball and glasses of the subject from obliquely below;
A storage unit for inputting and storing imaging data of the two cameras;
It has a monitor (display) and an input device (such as a mouse) connected to the computer,
Eyeball coordinate measuring means for obtaining two-dimensional coordinates (total of four locations) of the left and right eyeballs of the subject imaged by the two cameras, and further converting to three-dimensional coordinates based on these two-dimensional coordinates;
Means for determining vertical coordinates of the upper and lower ends of the left and right lens portions of the spectacle frame captured by two cameras, and determining a three-dimensional lens plane based on those values;
While displaying the image of the first camera or the second camera, the operator designates the position to obtain the two-dimensional coordinates of the lens peripheral portion in the image, and the two-dimensional coordinates and the three-dimensional lens plane type are obtained. 6. A spectacle lens selection / design support device according to claim 1, further comprising: means for obtaining a three-dimensional coordinate of the lens peripheral portion based on the position; and a means for outputting the position of the three-dimensional eyeball and the three-dimensional coordinate of the lens peripheral portion. .

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