TW201400084A - Fixation line measuring method, fixation line measuring device, eyeball rotation center measuring device, and view point measuring device - Google Patents

Abstract

To provide a fixation line measuring method capable of performing a high-precision fixation line measurement by using a simple structure. Using a pair of measuring glasses provided with glasses reference points at bilaterally symmetrical positions, a 3D camera set up at a specific position, a light source, and an analytic computer for allowing the analytic computer to perform: a process of allowing an examinee who wears a pair of measuring glasses to gaze at a particular fixation point and allowing the light source to emit light, and photographing the glasses reference points and corneal reflex points via the 3D camera; a process of analyzing positions of the glasses reference points and the corneal reflex points according to the photographed images; a process of calculating pupil center positions of the examinee according to the analyzed corneal reflex points; and a process of obtaining a fixation line by calculating a line which passes through the calculated pupil center and the fixation point gazed by the examinee.

Description

Eye line measuring method, eye line measuring device, eyeball turning point measuring method, and point point measuring device

The present invention relates to a fixation line measurement method, a fixation line measurement device, and an eyeball measurement point for measuring a fixation line at the time of distant fixation and a fixation line at the time of near gaze when measuring the eyesight of the eyeglasses or the like. Method and point of view measuring device.

From the prior art, as a method for measuring the intersection of the eyeglasses and the like, that is, the intersection of the eye-wearing eye and the eyeglass lens, for example, the method of the prior document 1 is known. This method measures the line of sight at the time of distant gaze (hereinafter referred to as a distant gaze line) and the line of sight at the time of near gaze (hereinafter referred to as a near-eye line), and calculates two gaze lines and glasses by calculating The position where the lenses intersect is used to determine the point of sight.

The measurement of the distant gaze line in the prior art as described above causes the subject to look at the distant gaze point and arrange the camera at a position that does not obstruct the subject's line of sight, thereby performing stereo photography. From the portrait of the stereoscopic photograph, the outline of the eye black and the white of the eye is extracted, and the center of the extracted eye black is taken as the center of the pupil, and the horizontal straight line extending in parallel from the center of the left and right pupils is set as the distant fixation line.

In the measurement of the near-eye line, the subject is photographed in the near direction and stereoscopically photographed in the same manner as in the distant gaze, and the pupil center is measured from the center of the eye black. Then, according to the distant gaze line, the eyeball revolving point is taken out. And a straight line passing through the pupil center and the eyeball reciprocating point at 2 o'clock is set as the near-eye line.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2003-45562

In general, most of the eyeball is covered by the eyelids or other parts, and photography cannot be performed in such a way as to be able to distinguish all the boundaries of the eye black and the white of the eye. Therefore, it is a very difficult task to extract the dark part of the eye and define the center of the pupil according to the boundary line between the eye black and the white of the eye. Further, since the eyeball system is a sphere and a cornea having a smaller radius is present in front of the pupil, there is a problem that it is difficult to measure with high precision for the pupil center.

Figure 1 is a graph showing the relationship between the left and right eye flat and gaze lines and the relationship between the eyeball gyroscopic point and the pupil center in the prior art gaze line measurement.

C _L and C _{R are} the imaginary eyeball roundabouts of the left and right eyes, and the line c represents the distance between the eyeballs, but this is the same distance from the center of the pupil when the distant eye is gazing. A _L and A _R are the apex of the eyeball when the left and right eyes are close to each other, and the line a is equal to the distance between the centers of the pupils when the near eye is gazing. The extension e _L of the line connecting the two points C _L and A _L and the extension e _R of the line connecting the two points C _R and A _R are the near-eye line, and the two are intersected at the point T. . At this time, the distance from the center O of the eyeballs A _L and A _R of the left and right eyes to T is the gaze distance.

When the distance between the centers of the pupils in the distant gaze is 64 mm, and the distance between the centers of the pupils in the near gaze is 61.6 mm, the gaze distance is 333 mm, but if the pupil center is in the near gaze In the measurement of the position, an error of 0.1 mm was generated at a single eye, and the distance between the centers of the pupils was 61.8 mm, and the fixation distance was changed to 365 mm. The measurement error of the center position of the pupil at 0.2 mm at both eyes is about 3 cm at the gaze distance. In this way, in the measurement of the line of sight, as long as there is a slight error, a large influence is exerted, and a method capable of measuring the line of fixation with higher accuracy is required.

Further, in the prior art, as in the above-described general, in the measurement of the near-eye line, the center point in the whirling motion of the eyeball called the eyeball turning point is used.

This eyeball roundabout point, in the case of an adult, assumes that the position is from the apex of the eyeball to a depth of 13 mm, but due to the actual eyeball gyration point, there is a deviation depending on the person, so This is assumed to be the above-mentioned eyeball gyration point of 13 mm, which can only be said to be an imaginary eyeball gyration point.

As shown in Fig. 1, in general, if the distance between the apex of the eyeballs A _L and A _R and the eyeball gyration points C _L and C _R is long, the influence of the measurement error of the center position of the pupil on the gaze distance can be reduced, however, As described above, the eyeball turning point is a short distance of 13 mm from the apex of the eyeball, and the eyeball turning point itself is only the center point of the imaginary, and therefore, there is a problem that it is difficult to accurately measure the gaze line.

Further, in the measurement method of the prior art, although the pupil center is obtained from the boundary between the eye black and the white of the eye, the eyeball is a sphere, and a cornea having a small radius is further present before the pupil. Therefore, in order to accurately measure the center of the pupil, it is an ideal form to arrange the camera on the line of sight in both the distant gaze and the near gaze. Therefore, it is inevitable that it is necessary to separately prepare a camera for distant gaze and near gaze, or it is necessary to move the camera, which is a factor for increasing the size and cost of the device.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method for measuring a high-precision gaze line by a simple device and a device used in the method.

Further, it is an object of the present invention to provide a method for measuring a realistic eyeball whirlpool point of a non-imaginary subject using the above method, and a device for measuring a target point when the eyeglass is created.

The first configuration of the present invention for solving the above-mentioned problems is a measurement eyeglass for providing a reference point for glasses at a left-right symmetrical position, a stereo camera provided at a specific position, a light source, and analysis. A computer for measuring a fixation line for measuring a line of sight of a subject, wherein the analysis computer performs a method of gazing at a specific gaze point by the subject in which the measurement glasses are attached and causing the light source Illumination, with stereo camera for the reference point of the glasses and the reflection point of the cornea Performing a photography project of photography; and acquiring a position information for analyzing the position of the eyeglass reference point and the corneal reflection point based on the image captured as described above; and calculating the subject's image based on the corneal reflection point analyzed as described above The pupil center of the pupil center position is acquired; and the line of the pupil line calculated by the above-mentioned pupil and the line of fixation of the subject's gaze point are obtained as the fixation line calculation project.

In the first configuration of the present invention, preferably, in the case of measuring the fixation line at the time of distant gaze, the imaging project causes the subject to look into the distance and photograph the eyeglass reference point and the corneal reflection point, and the gaze line The acquisition process is calculated as a horizontal straight line extending from the center of the pupil calculated as described above in the front-rear direction as a line of fixation at the time of distant gaze. In this case, it is preferable that the pupil center is obtained for each of the front view and the side view, and the cornea reflection point is P', the corneal center is C, and the line connecting the light source and the cornea center C is set. For s', the intersection point between the straight line s' and the corneal surface is Q, and the angle formed from the center of the pupil to the corneal reflection point P' when the angle formed between the straight line s' and the distant gaze line is β . 'P is extracted by the following formula P'P=(QC-QP')‧sin β , and the position of the pupil center is calculated by correcting the corneal reflection point P' by the above P'P.

Further, when measuring the gaze line in the near-eye gaze, it is preferable that the light source is marked with a near-eye gaze point index in a direction opposite to the light-emitting surface of the light source, and the photographic project is The examiner looks at the light-emitting surface of the light source, and in addition to the eyeglass reference point and the corneal reflection point, also photographs the near-focus point indicator, and the aforementioned position information is taken. In addition to the eyeglass reference point and the corneal reflection point, the near-eye fixation point is also analyzed according to the near-eye fixation point index. The pupil center is obtained as the pupil center position. The gaze point acquisition project is calculated by the straight line of the pupil center and the near gaze point as the gaze line at the time of near gaze. In this case, it is preferable that the light-emitting surface of the light source is provided with a detachable filter for dimming, and the surface of the light-reducing filter is marked with a close-up for the subject to look at. Gaze at the point.

The second configuration of the present invention, which is aimed at solving the above problems, is a measuring spectacator for providing a reference point for glasses at a left-right symmetrical position, a stereo camera provided at a specific position, and a rear camera side. A gaze line measuring device that measures a light source of a near-eye gaze point index and a computer for analysis, and measures the gaze line of the subject, wherein the analysis computer is configured to perform measurement The subject of the eyeglasses looks into the distance and causes the light source to emit light, and the stereoscopic camera photographs the eyeglass reference point and the corneal reflection point; and according to the photographed image, the eyeglass reference point and the cornea a position information acquisition project for analyzing the position of the reflection point; and calculating a pupil center of the pupil center position of the subject based on the corneal reflection point analyzed; and moving from the center of the pupil calculated to the front and rear direction The horizontal line of the extension, which is calculated as the line of fixation calculated from the gaze line in the distant gaze, The measurement is performed on the distant gaze line, and the subject is mounted on the light-emitting surface of the light source and the light source is illuminated by the subject in which the measurement glasses are attached, and the glasses are used by the stereo camera. a reference point and a corneal reflection point and the aforementioned near-eye fixation point index for photographing; and analyzing the eyeglass reference point and the corneal reflection point based on the photographed image, and according to the near-eye fixation point index a position information acquisition project for analyzing the position of the gaze point; and obtaining the project by using the analyzed corneal reflection point as the pupil center of the pupil center; and a straight line passing through the pupil center and the near center point analyzed as described above The gaze line calculated by the near-eye gaze line is used to measure the near-eye line.

In the second configuration of the present invention, it is preferable that the position information acquisition project in the measurement of the near-eye line includes the position of the eyeglass reference point in the portrait in the case of distant gaze and the image in the near-eye gaze. , and the magnification of the image of the two is set to the same image magnification correction project.

Further, in the second configuration of the present invention, it is preferable that the pupil center is obtained in the measurement of the distant fixation line, and the corneal reflection point is P', and the corneal center is set for each of the front view and the side view. When C is set, the line connecting the light source and the center of the cornea C is set to s', and the intersection of the straight line s' and the corneal surface is Q, and when the angle formed between the straight line s' and the distant gaze line is β, The distance P'P from the center of the pupil to the corneal reflection point P' is extracted by the following formula P'P=(QC-QP')‧sinβ, and the cornea reflection point is obtained by the aforementioned P'P P' is corrected and the position of the pupil center is calculated.

Further, in the second configuration of the present invention, it is preferable that the light-emitting surface of the light source is provided with a detachable filter for light reduction, and the surface of the light-reducing filter is marked with a The examiner makes a close look at the gaze point.

The third aspect of the present invention, which is an object of the present invention, is to provide a measuring eyeglass for providing a reference point for a pair of glasses at a left-right symmetrical position, a stereo camera installed at a specific position, and a rear camera side. A method for measuring an eyeball gyro point for measuring an eyeball gyroscopic point of a subject with a light source of a near-point gaze point indicator and a computer for analysis, wherein the analysis computer is implemented by: The subject of the measurement glasses gaze at the distance and emits the light source, and the stereoscopic camera photographs the eyeglass reference point and the corneal reflection point; and the eyeglass reference point is obtained based on the image taken as described above. And a position information acquisition project for analyzing the position of the corneal reflection point; and calculating a pupil center of the pupil's pupil center position based on the corneal reflection point analyzed as described above; and starting from the pupil center calculated as described above A horizontal line extending in the front-rear direction is obtained as a line of fixation calculated as a line of fixation in the distant gaze For the measurement of the distant gaze line, and by performing the method of illuminating the light-emitting surface of the light source with the light-emitting surface of the light source and causing the light source to emit light, the reference point and the cornea of the glasses are obtained by the stereo camera. a reflection point and the near-eye gaze point index are used for photographing photography; and the eyeglass reference point and the corneal reflection point are analyzed based on the photographed image, and the near-eye fixation point is used according to the near-eye fixation point index a position information acquisition project for analyzing the position; and obtaining the project by using the analyzed corneal reflection point as the pupil center of the pupil center; and the straight line passing through the pupil center and the near center point analyzed as described above The line of sight calculated by the line of sight The acquisition was performed to measure the near-eye line, and the intersection of the far-aspect line and the near-eye line measured as described above was calculated as an eyeball roundabout.

In the third configuration of the present invention, it is preferable that the position information acquisition project in the measurement of the near-eye line includes the position of the eyeglass reference point in the portrait in the case of distant gaze and the portrait in the near-eye gaze. , and the magnification of the image of the two is set to the same image magnification correction project.

Further, in the third configuration of the present invention, it is preferable that the pupil center is obtained in the measurement of the distant fixation line, and the corneal reflection point is P', and the corneal center is set for each of the front view and the side view. When C is set, the line connecting the light source and the center of the cornea C is set to s', and the intersection of the straight line s' and the corneal surface is Q, and when the angle formed between the straight line s' and the distant gaze line is β, The distance P'P from the center of the pupil to the corneal reflection point P' is extracted by the following formula P'P=(QC-QP')‧sinβ, and the cornea reflection point is obtained by the aforementioned P'P P' is corrected and the position of the pupil center is calculated.

Further, in the third configuration of the present invention, it is preferable that the light-emitting surface of the light source is provided with a detachable light-reducing filter, and the surface of the light-reducing filter is marked with a The examiner makes a close-up gaze at the gaze.

A fourth aspect of the present invention to solve the above problems is a lens for providing a reference point for glasses at a left-right symmetrical position, a stereo camera, and a light source marked with a near-eye gaze point on the back side. And the computer for analysis, for the eyes and glasses of the subject A target point measuring device for measuring a point of view formed by an intersection between the lenses, wherein the analysis computer is configured to illuminate the subject with the glasses and to illuminate the light source a photographing process for photographing the eyeglass reference point and the corneal reflection point by a stereo camera; and obtaining a position information for analyzing the position of the eyeglass reference point and the corneal reflection point based on the photographed image; and Based on the corneal reflection point analyzed, the pupil center acquisition project of the pupil center position of the subject is calculated; and the horizontal straight line extending from the center of the pupil calculated as described above in the front-rear direction is used as the fixation line in the distant gaze. The calculated gaze line is obtained for the measurement of the distant gaze line, and by performing: the subject wearing the spectacles is gazing at the light emitting surface of the light source and causing the light source to emit light, and by the stereo camera Photographic engineering of the reference point of the glasses and the corneal reflection point and the aforementioned near-eye fixation index; and The photographed image is obtained by analyzing the eyeglass reference point and the corneal reflection point, and acquiring the position information for analyzing the position of the near fixation point based on the near-eye fixation point index; and reflecting the cornea reflected The point is taken as the center of the pupil of the pupil center; and the line of the pupil center and the near center point which is analyzed as described above is used as the line of fixation calculated by the line of sight in the near gaze, and the project is taken for the near side. The line of sight is measured, and the position of the spectacle lens is calculated based on the analyzed eyeglass reference point, and the intersection of the calculated spectacle lens and the measured distant attention line and the near-eye line is used as a remote use. Calculated by the point of view and the use of the target.

The fourth configuration of the present invention is preferably measured in the near-eye line The location information acquisition project of the centering includes the image magnification correction project in which the magnification of the portraits of the two images is the same according to the position of the eyeglass reference point in the portrait when the gaze is in the distance and the portrait in the near gaze. .

Further, in the fourth configuration of the present invention, it is preferable that the pupil center is obtained in the measurement of the distant fixation line, and the corneal reflection point is P', and the corneal center is set for each of the front view and the side view. When C is set, the line connecting the light source and the center of the cornea C is set to s', and the intersection of the straight line s' and the corneal surface is Q, and when the angle formed between the straight line s' and the distant gaze line is β, The distance P'P from the center of the pupil to the corneal reflection point P' is extracted by the following formula P'P=(QC-QP')‧sinβ, and the cornea reflection point is obtained by the aforementioned P'P P' is corrected and the position of the pupil center is calculated.

Further, in the fourth configuration of the present invention, it is preferable that the light-emitting surface of the light source is provided with a detachable light-reducing filter, and the surface of the light-reducing filter is marked with a The examiner makes a close-up gaze at the gaze.

According to a fourth aspect of the present invention, in the analysis computer, the near-eye line re-acquisition project is further performed, and the near-eye line is re-acquired based on the far-sighted line and the near-eye line measured as described above. At the intersection point, the eyeball roundabout of the subject is calculated, and the straight line of the eyeball turning point set by the operator and the calculated eyeball turning point is calculated as a new near-eye line. .

According to the first and second configurations of the present invention, it is possible to obtain a high-accuracy fixation line measurement by obtaining the pupil center of the subject based on the corneal reflection point instead of the contour of the eye black. In this way, since it is not necessary to provide a camera on the fixation line when photographing the subject, it is possible to measure both the far-sighted line and the near-eye line by using one stereo camera. The measurement device is configured to be simple.

According to the third configuration of the present invention, the position of the eyeball turning point is calculated by the far-sighted line and the near-eye line obtained from the actually measured values, and the actual eyeball turning point of the subject can be measured. .

According to the fourth configuration of the present invention, since it is possible to perform high-accuracy fixation line measurement by a simple device including one stereo camera, it is possible to form the intersection of the fixation line and the spectacle lens. At the point of view, the measurement is made with high precision by a simple configuration.

Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

Fig. 2 is a view showing the configuration of the fixation line measuring device 1 according to the first embodiment of the present invention. As shown in FIG. 2, the attention line measurement device 1 is composed of the measurement glasses 2, the stereo camera 3, and the analysis computer 4.

The measuring glasses 2 are generally composed of a frame 21, left and right dummy lenses 22, and eyeglass reference points O _R , O _L as shown in FIG. 3 .

The frame 21 and the dummy lens 22 are only required to be glasses having a normal degree. Moreover, the dummy lens 22 is a member required to provide the glasses reference points O _R and O _L in the lens frame of the frame 21, and it is not necessary to use the entire area in the lens frame by the dummy lens 22 Come to occlusion.

The glasses reference points O _R and O _L are marks provided at the respective positions of the dummy lens 22 described above, and are positions for the glasses reference points O _R , O _L via the position information acquisition processing described later. For analysis, when the face of the subject 5 is tilted when the distant gaze and the near gaze are observed, the matter is detected and corrected.

The stereoscopic imaging device 3 is a photographer for the subject 5 at the time of distant gaze and near gaze, and is generally constituted by the stereo camera 31, the light source 32, and the imaging device frame 33 as shown in FIG.

The stereo camera 31 is a side-by-side arrangement in which the lenses are arranged side by side in the left-right direction of the subject 5, and is a position for specifying the three-dimensionality of the subject.

The stereo camera 31 in the present embodiment is controlled by the analysis computer 4 to be described later, and is a camera that can transfer the captured image to the analysis computer 5 after the shooting. However, When the computer 4 is used as a controller for analysis, a stereo camera having a general configuration can be used. In addition, it is also possible to arrange two or more cameras in parallel in parallel, and to control the two computers to be synchronized by the analysis computer 5.

The light source 32 is a strobe that emits light in conjunction with the stereo camera 31. When photographing, the light source 32 is illuminated, and the light is made The light is reflected by the eyes of the subject 5 and photographed.

Further, as shown in FIGS. 4(a) and 4(b), the light source 32 can detachably mount the filter 32b which serves as the near-pointing point T1 at the flash light-emitting surface 32a. Further, as shown in FIGS. 4(c) and 4(d), generally, on the back side of the light source 32, that is, on the side opposite to the light-emitting surface 32a of the flash light, it is marked for the near-pointing point. The position of T1 is the resolved near-pointing point indicator 32c.

The photographing device frame 33 is a frame for arranging the stereo camera 31 and the light source 32. The stereo camera 31 is fixed to the frame 33, and the light source 32 is detachably provided on the frame 33.

The analysis computer 4 is connected to the stereo camera 3, and is a computer that calculates the line of sight based on the image captured by the stereo camera 3 while controlling the stereo camera 3, and the computer 4 for analysis is used. It is a general-purpose computer, that is, an electronic computer in which a CPU, a memory, a memory device, an input/output device, and the like are connected via a bus bar. The position information acquisition project, the pupil center calculation project, and the fixation line calculation project, which will be described later, are executed via the analysis computer 4.

The above is the configuration of the fixation line measurement device 1 of the present embodiment. Hereinafter, a method of measuring the fixation line using the fixation line measurement device 1 will be described.

Fig. 5 is a view showing a flow of the measurement of the fixation line using the fixation line measuring device 1 of the present embodiment. The gaze line measuring device 1 is a device capable of measuring both the far gaze line and the near gaze line, and is measured in accordance with the flow for both eyes. By.

In the measurement of the distant gaze line, as shown in FIG. 2, in the state where the stereo camera 3 is placed on the table 61, the subject 5 is loaded with the measurement glasses 2 and sits in the chair 62. Up, and make it look at the distant gaze point T2. The distant gaze point T2 can be a target for the subject 5, regardless of the form, and if the subject 5 is allowed to look into the distance even if the distant gaze point is not used, Omit it.

The photographing project S01 shown in Fig. 5 is performed in the above state. The operator operates the analysis computer 4 to cause the light source 32 of the stereo camera 3 to emit light, and causes the light of the light source 32 to be reflected at the eyes of the subject 5 while being reflected by the light. The two eyes are photographed by the stereo camera 31, and the photographed image is transmitted to the analysis computer 4.

If the portrait is transmitted to the analysis computer 4 by the photographing project S01, the position information acquisition project S02 is executed by the computer 4. The position information acquisition project S02 extracts the eyeglass reference points O _R and O _L and the corneal reflection point P′ based on the image photographed by the photographing project S01, and combines the corresponding points of the left and right portraits. The 3-dimensional information of the specific position of the subject (that is, the subject 5) is reproduced. The analysis of the glasses reference points O _R , O _L and the corneal reflection point P′ is preferably performed by the analysis computer 4 for automatic analysis of the soft body. However, the analysis can be performed without using the analysis computer 4 . .

Figure 6 is a front view of the image data that will be reproduced in 3 dimensions. The pattern of the projector is shown in the sex (x-y plane). In the present embodiment, as shown in FIG. 2, the light source 32 is incorporated into a portion of the stereoscopic imaging device 3, and is illuminated with respect to the subject 5 along with the elevation angle, and The shape is a spherical surface, and therefore, the cornea reflection point P' is imaged at the lower portion of the pupil.

Further, the position at which the light source 32 is disposed is not limited to the above position. If the position of the light source 32 is set higher than the subject 5, the cornea reflection point P' is imaged above the center of the pupil, and if the light source 32 is facing the subject 5, the cornea reflection point P 'It is consistent with the height of the pupil center. If the light source 32 is provided separately from the stereo camera 3, it will become a large-scale device. However, in the present embodiment, by combining the light source 32 as a part of the stereo camera 3, it is possible to Set to a simple structure.

In the present embodiment, since the light source 32 is illuminated with respect to the subject 5 with an elevation angle as described above, the cornea reflection point P' is imaged at the lower portion of the pupil, in order to reflect the point according to the cornea. The center of the pupil is taken out, and the vertical direction (y direction) and the left and right direction (x direction) are corrected in accordance with the position where the light source 32 is placed.

If the three-dimensional position of the eyeglass reference points O _R and O _L and the corneal reflection point P′ are analyzed by the position information acquisition project S02, the pupil center acquisition engineering S03 system is executed by the analysis computer, and The position information of the corneal reflection point P' is corrected in the above y direction and the x direction, and the position information of the pupil center is obtained.

Fig. 7(a) shows the cornea reflection point P' and pupil of the subject 5 The positional relationship of the center P is a pattern diagram of a side view (y-z plane) projection. The image point P' is a corneal reflection point. However, since the shape of the front surface of the cornea is a spherical surface, the cornea reflection point is not formed on the surface of the cornea but at the image point P' on the inner side. Virtual image. Therefore, the y component and the z component of the coordinates obtained as the three-dimensional data of the corneal reflection point are not on the surface of the cornea but on the y component and the z component of the image point P'.

The light incident from the light source 32 to the apex of the eye is set to s, and the light from the light source 32 toward the center of the cornea is set to s'. s', although strictly speaking, is not parallel to s, but the distance (depth distance) between the stereo camera 31 including the light source 32 and the subject's eyes is set to 70 to 80 cm, and can be It is seen as slightly parallel. The image point P' is a straight line including the light ray s' from the light source 32, and a straight line including the reflected light g from the cornea toward the stereo camera 31, and the intersections between the straight lines coincide. If the angle formed by the light s' and the distant attention line d is β _y , the y coordinate of the pupil center P is the correction value P'P added to the y component of the image point P'.

The correction value P'P can be calculated by (QC-QP') ‧ sinβ _y . Here, QP' is a distance from the corneal surface to the image point P', and can be taken out according to the law of reflection. In the calculation of the distance QP', the corneal radius QC is required. However, the corneal radius of the human body is 7.8 mm, and the distribution range is 6.8 to 8.5 mm. Even if the average value is used for calculation, the error range becomes ± The degree of 0.1mm, therefore, even if the distribution range is neglected, the effect on the correction value can be ignored.

Fig. 7(b) is a schematic view showing a positional relationship between the corneal reflection point and the pupil center of the right eye of the subject 5 in a front view (x-z plane). Similarly to Fig. 7(a), the image point P' is a corneal reflection point which is formed with a virtual image not on the surface of the cornea but at the image point P' on the inner side.

The light source 32 and the stereo camera 31 are arranged at intervals in the same front and rear direction axes (z-axis), but the distance from the eyes of the subject 5, that is, the depth distance, It is set to about 70 to 80 cm, and the incident light from the light source 32 and the reflected light from the cornea toward the stereo camera 31 can be regarded as the same straight line. That is, in Fig. 7(a), the incident light rays s, s' and the reflected light ray g can be substituted by a straight line g, and the image point P' is present on the straight line g.

If the angle formed by the light g and the distant attention line d is β _x , the x coordinate of the pupil center P is added to the x component of the image point P′ by the correction value P′P. The correction value P'P is the same as the correction value on the yz plane described above, and can be extracted via (QC-QP') ‧ sinβ _x

In the pupil center acquisition project S03, the correction value in the y direction and the correction value in the x direction are extracted, and the correction center is added to the y component and the x component of the corneal reflection point to extract the pupil center position. . Through this project S03, it is possible to freely set the position of the light source 32 regardless of the position of the distant fixation point. By this, it is possible to The source 32 is incorporated into the stereography device 3, and it is not necessary to provide a device for separately setting the light source in the case of distant gaze and near gaze. According to this configuration, the fixation line measuring device 1 can be made simple.

When the position of the pupil center P is obtained by acquiring the item S03 via the pupil center, the attention line acquisition item S04 is executed via the analysis computer 4.

In the far-sighted line measurement, a line parallel to the front-rear direction (z-axis direction) is taken from each of the right and left pupil centers P, and this straight line is taken as a distant attention line.

After the measurement of the distant fixation line is completed, next, the measurement of the near-eye line can be performed. Further, in the present embodiment, the order of measurement of the fixation line is determined by first measuring the distant fixation line and then measuring the near fixation line. However, the order is not limited thereto, and the near-gaze line may be first performed. Determination.

When the measurement of the near-eye line is performed, as shown in Fig. 8, the light source 32 is separated from the stereo camera 31, and the subject 5 holds the light source 32 to gaze at the near gaze point. Although the photographing project S01 is carried out in the above state, it is necessary to form the near-eye gaze point target 32c including the back surface of the light source 32 in the image photographed at this time.

When the photographing project S01 is completed, the position information acquisition project S02 is executed via the analysis computer 4, which is the same as the remote eye line measurement.

FIG. 9 is a projection of the front view (x-y plane) of the image data which is reproduced in three dimensions by the position information acquisition project S02. The model diagram of the show. In the portrait at the time of near-eye gaze, since the close-up gaze point target 32c marked on the back surface of the light source 32 is included in the portrait, it is necessary to analyze the near-eye gaze point target 32c as well.

Further, in the present embodiment, the light source 32 is provided with a filter 32b for dimming the near-eye gaze point T1 on the light-emitting lamp light-emitting surface 32a, but as shown in Figs. 4(c) and (d). Generally, since the near-eye gaze point target 32c is disposed at the back of the light source 32, strictly speaking, between the position of the near-eye gaze point target 32c and the position of the near-eye gaze point T1, There are differences in the system. In the position information acquisition project S02, the position of the near-eye fixation point T1 is obtained based on the position of the near-eye fixation point target 32c by correcting the difference.

Further, as described above, the fixation line measurement device 1 of the present embodiment can measure both the far-agree line and the near-eye line, but in the near-eye gaze, the subject 5 is gazing at the light source 32. Therefore, the face will naturally tilt, and it can be inferred that the distance between the subject 5 and the stereo camera 3 changes when the distant gaze and the near gaze. When the near-eye gaze is detected, the above-described change is detected based on the positions of the eyeglass reference points O _R and O _L in the photographic image at the time of distant gaze and near gaze, and correction for canceling the magnification difference or the like can be performed. The interval between the reference points O _R and O _L of the glasses may be arbitrary. However, when the distance is long, the accuracy of comparing and correcting the size of the image is further improved. From this point of view, in the present embodiment, the eyeglass reference points O _R , O _L are respectively disposed at the outer sides of the left and right dummy lenses 22.

Further, since the correct distance between the glasses reference points O _R and O _L has been previously known, the glasses reference points O _R and O _{L are} also used as three-dimensional data by the same as the cornea reflection point or the like. In the reproduction, it is possible to know the correct actual size position of each point of the corneal reflection point P' which is three-dimensionally reproduced, based on the distance between the glasses reference points O _R and O _L . Thereby, the pupil center position at the time of distant gaze and the pupil center position and the near gaze point position at the time of near gaze can be reproduced in three dimensions in the same coordinate system at an actual magnification. Thereby, the fixation point measurement device 1 and the fixation point measurement method can be applied to the eyeball roundabout measurement and the point of view measurement which will be described later.

If the position of the corneal reflection point, the glasses reference point O _R , O _L , and the near-eye fixation point T1 is analyzed by the position information acquisition item S02, the pupil center acquisition item S03 is executed by the analysis computer 4.

Fig. 10 (a) and (b) are schematic diagrams showing the positional relationship between the corneal reflection point and the pupil center in the near gaze. When looking at the near side, it is different from the distant gaze, and the near-eye line and the light from the light source 32 toward the eye are consistent. Therefore, since the image point P is obtained on the fixation line, the image point P obtained as the three-dimensional data is a corneal reflection point and also serves as a pupil center. In the near-eye gaze, since the position in the space of reality and the position of the three-dimensional data obtained through image analysis are consistent, the pupil center obtains the project S03, and the cornea obtained by the project S02 is obtained by the position information. The position of the reflection point is directly used as the pupil center P.

If the pupil center position project S03 ends, it is analyzed by electricity. In the brain 4, the gaze line is acquired to obtain the project S04.

In the near-eye line measurement, the near-eye gaze point T1 obtained by the position information acquisition S02 and the pupil center P obtained by the pupil center obtaining the item S03 are respectively acquired as data in the three-dimensional space. Therefore, as shown in FIGS. 11(a) and 11(b), a straight line extending from the center of the pupils P _L and P _R of the left and right eyes toward the near gaze point T1 is a near-eye line. . The line of sight acquisition project S04 is for the purpose of taking out the above-mentioned line.

Although the first embodiment of the present invention has been described above, in the present embodiment, the pupil center P and the near-eye gaze point T1 obtained in the result of image analysis can be used for the near side. Look at the line for analysis. At this time, since the hypothetical eyeball gyro point which is 13 mm from the apex of the eyeball is not used, it is possible to measure the near gaze point with high accuracy.

Further, in the above-described prior art, in the near-eye gaze, the subject is photographed via the camera while holding the camera and the near-eye gaze point integrated, but this is the case. At this time, since the position of the near-eye fixation point cannot be specified by the device, it is necessary to additionally provide a new three-dimensional measurement device externally in order to specify the position of the near-eye fixation point. Therefore, in this configuration, the entire system of the device becomes a large-scale person. However, in the configuration of the present embodiment, the near-eye fixation point is obtained based on the near-eye fixation point index 32c provided at the light source 32. The position of T1 does not require an external three-dimensional measuring device or the like, and the gaze point measuring device 1 can be simplified.

Further, the distant attention line and the near-eye line can be measured together with the fixation line measuring device 1. Since it is not necessary to separately provide a camera or the like in the case of distant gaze and near gaze, it is possible to realize high-accuracy fixation line measurement by a simple device.

In the first embodiment, the far-sighted line and the near-eye line can be obtained as three-dimensional data on the same coordinate by the fixation line measuring device 1 and the fixation line measuring method. In the second embodiment of the present invention, the visual gyroscopic point of the individual is used for the non-imaginary subject 5 using the distant gaze line and the near gaze line measured by the gaze line measuring method. As a measurer.

Fig. 12 is a conceptual diagram showing the flow of the eyeball turning point measuring method of the second embodiment. In addition, the configuration of the first fixation line measuring device 1 is directly used in the eyeball turning point measuring method of the second embodiment.

The distant attention line measurement project S05 and the near-eye line measurement project S06 are specifically the eye line measurement methods described in the first embodiment, that is, the items S01 to S04. When the measurement of both the distant attention line and the near-eye line is completed, the eyeball turning point acquisition project S07 is executed by the analysis computer 4.

13(a) and 13(b) are schematic diagrams showing the distant fixation line and the near fixation line on the same coordinate. The straight lines d _L and d _{R are} the distant gaze lines of the left and right eyes, and the straight lines e _L and e _{R are} the near-eye gaze lines of the left and right eyes. By taking the intersection of the straight line d _L and the straight line e _{L and} the intersection of the straight line d _R and the straight line e _R , it is possible to obtain the eyeball turning point C _L , C of the left and right eyes when actually looking at the near gaze point T1. _R.

In the second embodiment, since the eyeball gyration point is measured using the near-eye line obtained from the near-field gaze point of the reality, the realistic eye of the subject 5 can be measured by a simple device. Roundabout.

On the other hand, if the distant and near-eye lines are specified, when creating a spectacle lens such as a progressive lens, it is the most appropriate position for the point of view (that is, the intersection of the line of sight and the spectacle lens). Make settings. According to a third embodiment of the present invention, a point of view measurement device and a point of view measurement method using the fixation line measurement method according to the first embodiment are used.

In the eyepiece measuring device according to the third embodiment, the measuring eyeglasses 2 in the first embodiment are changed to the glasses 2' in which the dummy lens 22 is combined at the frame 21' of the actually made eyeglasses ( Hereinafter, it is called newly made glasses 2').

Newly made glasses, as shown in Figure 14, are marked with glasses reference points U _R , U _L , L _R , L _L , O _R , O _L , I _R , I at the newly made glasses 2' _L. The difference from the first embodiment is that the frame 21' having the actually formed glasses is used, and four glasses are provided at the respective dummy lenses 22, respectively.

Figure 15 is a conceptual diagram showing the flow of the method of measuring the point of view. In the second embodiment, the eyeball turning point acquisition project S07 is provided after the distant eye line measurement project S05 and the near-eye line measurement project S06. However, in the third embodiment, the eyeball turning point is acquired instead of the eyeball. S07, and set the point to get the project S08.

In the third embodiment, the remote eye line measurement project is included In S05, the position information acquisition project S02 of the near-eye line measurement project S06 analyzes the plane based on the glasses reference point (the glasses reference plane) in addition to the analysis of the glasses reference point.

In Fig. 14, the glasses reference point is a reference point of the glasses marked with 4 points on the right and left dummy lenses, respectively. O _R , I _R , I _L , O _L , on a horizontal line, are marked equidistantly from the center, U _R , L _R and U _L , L _L , in relation to the reference point on the horizontal line It is marked in an orthogonal manner.

16(a) and 16(b) are schematic diagrams showing the positional relationship between the distant gaze line of the right eye of the subject and the reference plane of the glasses. According to the glasses reference points U _R and L _R , the tilt angle α of the upper and lower directions of the dummy lens can be generally obtained as shown in FIG. 16( a ), and according to the glasses reference points I _R and O _R , as shown in FIG. 16( b ) The tilt angle β in the left-right direction of the dummy lens is generally obtained as shown. The eyeglass reference surface is obtained as a plane including the eyeglass reference point I _R having an inclination angle α in the vertical direction and a three-dimensional inclination angle β in the left and right direction.

When the remote attention line measurement project S05 and the near-eye line measurement project S06 including the above-described project are completed, the target point measurement project S07 is executed by the analysis computer 4.

In the position information acquisition project S02, since the eyeglass reference plane is analyzed, the target point can be obtained by calculating the intersection point between the eyeglass reference plane and the far eye line, and the target point is used. The figure can be extracted by calculating the intersection of the eyeglass reference plane and the near-eye line.

Fig. 17(a) is a schematic diagram showing the far-sighted point of view and the near-use point of view, and FE _R and FE _L are used for far-reaching purposes, NE _R , NE _L , It is a near-use point of view.

Further, Fig. 17(b) is a partial enlarged view of Fig. 17(a), and a _y corresponds to the amount of swirling of the lower part of the eye from the time of distant gaze to the time of near gaze, and becomes a progressive band for determining the progressive lens. The length of the parameter. Similarly, a _x is a parameter corresponding to the amount of convection (straight squint) of the eye from the time of distant gaze to the time of near gaze, and becomes a parameter for determining the in-set of the progressive lens.

In the point of view measurement project S07, the amount of internal shift is also measured for the above-mentioned point of view and the progressive tape length of the progressive lens.

By using the imaginary eyeball gyroscopic point instead of the gaze point extracted by the gaze point taken out from the near gaze point target, the above value can be measured by simple construction. The measurement is made for the most appropriate position of the target.

Further, by combining the configurations of the second embodiment, in the present embodiment, the actual eyeball turning point of the subject can be obtained. For example, when it is necessary to perform the fine adjustment of the fixation point position T such as the fixation distance, it is not necessary to perform the photography again for the subject in the near-eye gaze, and it is possible to re-establish the position according to the new fixation point and the eyeball revolving point. Calculate the near-eye line and make changes to the near-use point.

Further, the constitution of the present invention is not limited to the above embodiments.

For example, in the first embodiment, the stereo camera 31 is provided at a position where it is photographed with an elevation angle from the lower side of the subject 5. However, the position of the stereo camera 31 is not limited thereto, and may be set, for example, at a position accompanied by a depression angle.

Further, the stereoscopic imaging device 3 and the analysis computer 4 are only required to be able to control the stereoscopic imaging device 3 by the analysis computer 4, and can be controlled by wire or by wireless.

The other specific configurations are not limited by the above-described embodiments, and various changes can be made without departing from the spirit and scope of the invention.

1‧‧‧ gaze line measuring device

2‧‧‧Measurement glasses

3‧‧‧Three-dimensional camera

31‧‧‧ Stereo Camera

32‧‧‧Light source

33‧‧‧Photographic device framework

4‧‧‧analysis computer

5‧‧‧Subjects

[Fig. 1] A conceptual diagram showing a method for measuring a near-eye line of the prior art.

Fig. 2 is a conceptual diagram when measuring a distant attention line in the first embodiment caused by the present invention.

Fig. 3 is a view showing the measurement glasses in the same embodiment.

[Fig. 4] is a view showing a light source in the same embodiment, (a) is a front view in a state where the filter is removed, and (b) is a filter attached. The front view of the state, (c) is a rear view, and (d) is a side view.

[Fig. 5] A conceptual diagram of the flow of the fixation line measurement in the same embodiment.

Fig. 6 is a front view showing the positional relationship between the corneal reflection point and the eyeglass reference point in the distant gaze in the same embodiment.

Fig. 7 is a view showing the positional relationship between the corneal reflection point and the pupil center in the distant gaze in the same embodiment, and (a) is a side view. Figure (b) is a plan view.

Fig. 8 is a conceptual diagram when the near-eye line is measured in the same embodiment.

Fig. 9 is a front view showing the positional relationship between the corneal reflection point and the eyeglass reference point in the near-eye gaze in the same embodiment.

Fig. 10 is a view showing the positional relationship between the corneal reflection point and the pupil center in the near-eye gaze in the same embodiment, (a) is a side view, and (b) is a plan view.

Fig. 11 is a view showing a positional relationship between a pupil center and a fixation point in the near-eye gaze in the same embodiment, (a) is a plan view, and (b) is a side view.

Fig. 12 is a conceptual diagram showing the flow of eyeball turning point measurement in the second embodiment caused by the present invention.

Fig. 13 is a view showing the relationship between the far-sighted line, the near-eye line, and the eyeball turning point in the second embodiment, wherein (a) is a plan view and (b) is a side view.

Fig. 14 is a view showing a newly formed eyeglass in the third embodiment caused by the present invention.

Fig. 15 is a conceptual diagram showing the flow of the point of view measurement in the third embodiment.

Fig. 16 is a view showing the relationship between the eyeball, the distant fixation line, and the eyeglass reference plane of the subject in the third embodiment, wherein (a) is a side view and (b) is a plan view.

[Fig. 17] For the distant use point and near use in the third embodiment The front view of the relationship between points.

2‧‧‧Measurement glasses

3‧‧‧Three-dimensional camera

31‧‧‧ Stereo Camera

32‧‧‧Light source

33‧‧‧Photographic device framework

4‧‧‧analysis computer

5‧‧‧Subjects

61‧‧‧Table

62‧‧‧ chairs

T2‧‧‧ distant gaze

Claims (18)

A method for measuring a fixation line is a measurement eyeglass for measuring a contact point provided with a glasses reference point at a left-right symmetric position, and a stereo camera installed at a specific position, a light source, and a computer for analysis. The gaze line measuring method for measuring the line of sight is characterized in that the analysis computer performs a method of causing a subject in which the measuring glasses are attached to look at a specific gaze point and illuminate the light source, thereby using a stereo camera. a photographing project for photographing the eyeglass reference point and the corneal reflection point; and obtaining a position information for analyzing the position of the eyeglass reference point and the corneal reflection point based on the image captured as described above; and the corneal reflection point analyzed according to the foregoing To calculate the pupil center of the subject's pupil center position, and to obtain the line of the gaze line calculated by the above-mentioned calculated pupil center and the gaze point that makes the subject look at the line of sight. . The gaze line measuring method according to the first aspect of the invention, wherein the gaze line measuring method is a gaze line measuring method in a distant gaze, wherein the photographing project causes the subject to look into the distance and to the glasses reference The point and the corneal reflection point are photographed, and the gaze line acquisition project is a horizontal straight line extending from the center of the pupil calculated as described above in the front-rear direction as a gaze in the distant gaze. Calculated by the line. The gaze line measuring method according to the second aspect of the invention, wherein the pupil center acquisition process is performed for each of the front view and the side view, and the cornea reflection point is P', and the cornea center is C. The line connecting the light source and the center of the cornea C is set to s', and the intersection of the straight line s' and the corneal surface is set to Q, and when the angle formed between the straight line s' and the distant gaze line is β , the center will be from the pupil center. The distance P'P from the corneal reflection point P' is extracted by the following formula: P'P = (QC - QP') ‧ sin β , and the cornea reflection point P is obtained by the aforementioned P'P 'Make a correction and calculate the position of the pupil center. The gaze line measuring method according to the first aspect of the invention, wherein the gaze line measuring method is a gaze line measuring method in the near gaze, wherein the light source is opposite to a light emitting surface of the light source. Marked with a near-eye gaze point indicator, the photographic project is such that the subject is gazing at the light-emitting surface of the light source, and in addition to the eyeglass reference point and the corneal reflection point, the near-eye gaze point indicator is also photographed. In addition to the eyeglass reference point and the corneal reflection point, the position information acquisition project also analyzes the near-eye fixation point according to the near-eye fixation point index, and the pupil center is obtained as the pupil center. The position, the gaze point acquisition project, is calculated by the straight line of the pupil center and the near gaze point as the gaze line at the time of near gaze. The gaze line measuring method according to the fourth aspect of the invention, wherein the light-emitting surface of the light source is provided with a detachable light-reducing filter, and the surface of the light-reducing filter is It is marked with a near-eye gaze point that allows the subject to make a gaze. A gaze line measuring device is a measuring spectacator provided with a spectacles reference point at a left-right symmetrical position, a stereo camera installed at a specific position, and a light source marked with a near-eye gaze point at the back side. And a gaze line measuring device for measuring the gaze line of the subject, wherein the analysis computer is configured to: gaze the subject with the measurement glasses and gaze at the distance a photographing process for photographing the eyeglass reference point and the corneal reflection point by the stereo camera, and positional information for analyzing the position of the eyeglass reference point and the corneal reflection point based on the photographed image Acquire the project; and Based on the corneal reflection point analyzed, the pupil center acquisition project of the pupil center position of the subject is calculated; and the horizontal straight line extending from the center of the pupil calculated as described above in the front-rear direction is used as the fixation line in the distant gaze. The calculated gaze line acquisition project is used to measure the distant gaze line, and by performing: the subject wearing the measurement spectacles is gazing at the light-emitting surface of the light source and illuminating the light source, and the stereo camera is used Performing a photographing process for photographing the eyeglass reference point and the corneal reflection point and the near-eye fixation point index; and analyzing the eyeglass reference point and the corneal reflection point based on the photographed image, and according to the near-eye fixation point index a position information acquisition project for analyzing the position of the near-pointing point; and obtaining the project by using the analyzed corneal reflection point as the pupil center of the pupil center; and a straight line passing through the pupil center and the near center point analyzed as described above , as the line of fixation calculated by the near-eye gaze line, the project is obtained, Line side for fixation assay. The gaze line measuring device according to the sixth aspect of the invention, wherein the position information acquisition project in the measurement of the near-eye line includes: an image based on a distant gaze and a portrait at a close gaze The position of the reference point of the glasses in the middle, and the magnification of the portrait of the two is set to The same image magnification correction project. The gaze line measuring device according to the sixth aspect or the seventh aspect of the invention, wherein the pupil center is obtained in the measurement of the distant gaze line, and the cornea is reflected in each of the front view and the side view. The point is set to P', the center of the cornea is set to C, the line connecting the light source and the center of the cornea C is set to s', and the intersection of the straight line s' and the corneal surface is set to Q, and the line s' and the distant gaze line are When the angle is β, the distance P'P from the center of the pupil to the corneal reflection point P' is obtained by the following formula: P'P=(QC-QP')‧sinβ, and is obtained by The corneal reflection point P' is corrected by the aforementioned P'P, and the position of the pupil center is calculated. The gaze line measuring device according to any one of claims 6 to 8, wherein the illuminating surface of the light source is provided with a detachable filter for dimming, and the dimming filter is used. On the surface of the filter, it is marked with a near-eye gaze point for the subject to look at. A method for measuring an eyeball gyroscopic point is a measuring spectacles for setting a spectacles reference point at a left-right symmetrical position, and a stereo camera installed at a specific position, and a near-eye gaze point indicator on the back side. Light source, and computer for analysis, to the eyeball of the subject A method for measuring an eyeball gyroscopic point for measuring is characterized in that the computer for analysis is performed by causing a subject in which the measuring glasses are attached to look far into the distance and emit the light source, thereby using a stereo camera. a photographing project for photographing the eyeglass reference point and the corneal reflection point; and a position information obtaining project for analyzing the position of the eyeglass reference point and the corneal reflection point based on the photographed image; and the corneal reflection point analyzed according to the foregoing The calculation of the pupil center of the subject's pupil center position and the horizontal line extending from the center of the pupil calculated in the front-rear direction as the fixation line calculated in the distant gaze. The measurement is made for the distant fixation line, and by performing: the subject wearing the measurement glasses is gazing at the light-emitting surface of the light source and causing the light source to emit light, and the reference point of the glasses and the cornea reflection point by the stereo camera And the above-mentioned near-eye gaze index for photography photography; and photographed according to the foregoing For example, the eyeglass reference point and the corneal reflection point are analyzed, and the position information for analyzing the position of the near gaze point is obtained according to the near gaze point index; and the analyzed corneal reflection point is taken as the pupil center The pupil center obtains the project; and the pupil center and the near center point that will be resolved by the foregoing The line, which is the gaze line calculated as the gaze line in the near gaze, is used to measure the near-eye line, and the intersection of the far-sighted line and the near-eye line determined as the eyeball turning point is used. Calculated. The eyeball roundabout measurement method according to the tenth aspect of the invention, wherein the position information acquisition process in the measurement of the near-eye line includes: according to a portrait in a distant gaze and a near-eye gaze In the image, the position of the reference point of the eyeglasses is set, and the magnification of the portraits of the two images is set to be the same as the image magnification correction project. The method for measuring an eyeball whirlpool according to the tenth or eleventh aspect of the invention, wherein the pupil center is obtained in the measurement of the distant gaze line, and the cornea is used for each of the front view and the side view. The reflection point is set to P', the center of the cornea is set to C, the line connecting the light source and the center C of the cornea is set to s', and the intersection of the straight line s' and the corneal surface is set to Q, and the line s' and the distant gaze line are When the angle formed is β, the distance P'P from the center of the pupil to the corneal reflection point P' is obtained by the following formula: P'P=(QC-QP')‧sinβ, and is borrowed. The position of the pupil center is calculated by correcting the corneal reflection point P' by the aforementioned P'P. As described in any of the 10th to 12th patent applications. The method for measuring an eyeball gyroscopic point, wherein a light-removing surface of the light source is provided with a detachable filter for dimming, and the surface of the light-reducing filter is marked to be made by the subject Look at the near side of the gaze. A sight point measuring device is a lens that is provided with a glasses reference point at a left-right symmetrical position, a stereo camera, a light source marked with a near-eye gaze point on the back side, and a computer for analysis. A target point measuring device for measuring a point of view formed by an intersection between a line of sight of a subject and a lens of the eyeglasses, wherein the computer for analysis is configured to: mount the eyeglasses The subject looks at the distance and causes the light source to emit light, and the photographic work for photographing the eyeglass reference point and the corneal reflection point by the stereo camera; and the eyeglass reference point and the cornea reflection point according to the photographed image a position information acquisition project for analyzing the position; and calculating a pupil center of the subject's pupil center position based on the corneal reflection point analyzed; and a level extending from the center of the pupil calculated to the front and rear direction Straight line, as the line of fixation calculated from the gaze line in the distant gaze, the project is taken to test the distant gaze line. , And, by implementation of: making the glasses are filled with the subject's gaze light emitting surface of the light source and Light-emitting the light source, and photographing the glasses reference point and the corneal reflection point and the near-eye fixation point index by a stereo camera; and performing the eyeglass reference point and the corneal reflection point according to the photographed image Parsing, and obtaining a position information for analyzing the position of the near-eye point according to the near-eye gaze point index; and obtaining the project by using the parsed corneal reflection point as the pupil center of the pupil center; and The line of the pupil center and the center point of the near point is used as a line of fixation calculation calculated as the line of fixation in the near gaze, and the near-eye line is measured, and the eyeglass lens is calculated based on the analyzed eyeglass reference point. At the position, the intersection of the calculated eyeglass lens and the measured distant attention line and the near-eye line is calculated as a distant point of interest and a near point of interest. The point-of-view measuring device according to the fourth aspect of the invention, wherein the position information acquisition project in the measurement of the near-eye line includes: according to a portrait in a distant gaze and a near-eye gaze In the image, the position of the reference point of the eyeglasses is set, and the magnification of the portraits of the two images is set to be the same as the image magnification correction project. The eye point measuring device according to the invention of claim 14 or claim 15, wherein the pupil center is obtained in the measurement of the distant fixation line, and the cornea is oriented for each of the front view and the side view. The reflection point is set to P', Set the center of the cornea to C, set the line connecting the light source to the center C of the cornea as s', set the intersection of the straight line s' and the corneal surface to Q, and set the angle between the straight line s' and the distant gaze line to β. At this time, the distance P'P from the center of the pupil to the corneal reflection point P' is obtained by the following formula: P'P = (QC - QP') ‧ sinβ, and is obtained by the aforementioned P'P The position of the pupil center is calculated by correcting the corneal reflection point P'. The eye point measuring device according to any one of claims 13 to 16, wherein the light-emitting surface of the light source is provided with a detachable filter for dimming, and the dimming is performed On the surface of the filter, the close-up gaze point for the subject to look at is marked. The target point measuring device according to any one of the preceding claims, wherein the analysis computer further implements a near-eye line re-acquisition project, and the near-eye line is re-acquired. The eyeball gyration point of the subject is calculated based on the intersection of the distant gaze line and the near gaze line measured above, and the near gaze point set by the operator and the calculated The straight line of the eyeball roundabout is calculated as a new near-eye line.