WO2016143862A1 - 眼鏡装用パラメータ測定装置、眼鏡装用パラメータ測定プログラムおよび位置指定方法 - Google Patents
眼鏡装用パラメータ測定装置、眼鏡装用パラメータ測定プログラムおよび位置指定方法 Download PDFInfo
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- WO2016143862A1 WO2016143862A1 PCT/JP2016/057609 JP2016057609W WO2016143862A1 WO 2016143862 A1 WO2016143862 A1 WO 2016143862A1 JP 2016057609 W JP2016057609 W JP 2016057609W WO 2016143862 A1 WO2016143862 A1 WO 2016143862A1
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- image
- wearing
- spectacle
- subject
- frame
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C13/00—Assembling; Repairing; Cleaning
- G02C13/003—Measuring during assembly or fitting of spectacles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0016—Operational features thereof
- A61B3/0041—Operational features thereof characterised by display arrangements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/11—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring interpupillary distance or diameter of pupils
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C13/00—Assembling; Repairing; Cleaning
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0012—Biomedical image inspection
- G06T7/0014—Biomedical image inspection using an image reference approach
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20212—Image combination
- G06T2207/20221—Image fusion; Image merging
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30004—Biomedical image processing
- G06T2207/30041—Eye; Retina; Ophthalmic
Definitions
- the present invention relates to a spectacle wearing parameter measurement device, a spectacle wearing parameter measurement program, and a position designation method used when measuring spectacle wearing parameters.
- spectacle wearing parameters measured by a spectacle wearer wearing a spectacle frame are required.
- spectacle wearing parameters a distance between corneal apexes, a frame forward tilt angle, a fitting point position, a distance between pupils, a frame warp angle, and the like are known.
- Spectacle wearing parameters are measured using a dedicated measuring device.
- the dedicated measuring device is configured to, for example, capture the face of the subject wearing a spectacle frame and calculate various spectacle wearing parameters based on the face image as a result of the imaging.
- the imaging result of the subject's face is displayed on a screen, and a point serving as a reference for measurement using a cursor mark or the like on the screen (for example, , Specify the corneal apex of the subject, the spectacle frame front frame, etc.) and calculate the spectacle wearing parameters such as the intercorneal apex distance and the frame forward tilt angle based on the position of the measurement reference point on the screen.
- a point serving as a reference for measurement using a cursor mark or the like on the screen for example, Specify the corneal apex of the subject, the spectacle frame front frame, etc.
- the spectacle wearing parameters such as the intercorneal apex distance and the frame forward tilt angle based on the position of the measurement reference point on the screen
- a deformation mechanism may be provided for the temple of the spectacle frame in order to change the relative position between the spectacle wearer's eye position and the spectacle lens.
- the temple width of the spectacle frame becomes wide (see, for example, FIG. 1A and FIGS. 2 to 3 of Patent Document 2).
- the spectacle wearing parameter is measured based on the position of the measurement reference point on the screen. That is, specifying the position of the measurement reference point on the screen displaying the face image of the subject is an indispensable process for measuring the spectacle wearing parameters. Therefore, it is desirable that the position designation of the measurement reference point can be easily performed. In addition, since the position of the measurement reference point directly affects the measurement result of the spectacle wearing parameter, it is required that the designation is performed with high accuracy. For example, when measuring the distance between corneal apexes, it is necessary that the position of the measurement reference point is correctly aligned with the corneal apex of the subject.
- the position of the measurement reference point is specified on a screen that displays the face image of the subject.
- the position of the corneal apex of the subject on the face image obtained by imaging the face side of the subject is set as one of the measurement reference points. It will be specified as one.
- the image used for measuring the spectacle wearing parameters and specifying the position of the measurement reference point therefor is obtained by capturing the face of the subject wearing the spectacle frame.
- the present invention provides a spectacle wearing parameter measurement that enables the specification of the position of the measurement reference point when the position of the measurement reference point is specified on the face image of the subject when measuring the spectacle wearing parameter.
- An object is to provide an apparatus, a spectacle wearing parameter measurement program, and a position designation method.
- a first aspect of the present invention is a spectacle wearing parameter measurement device used when measuring spectacle wearing parameters of a subject wearing a spectacle frame, which is a face image in a state of wearing the spectacle frame of the subject.
- An information processing unit that obtains a first image and a second image that is a face image in a state where the glasses frame is not worn, and prepares a third image in which the first image and the second image are associated;
- a display screen unit for displaying an image prepared by the information processing unit, an operation unit for specifying a measurement reference point for spectacle wearing parameters on the image displayed on the display screen unit, and data of the specified measurement reference point
- a spectacle wearing parameter measuring apparatus comprising: a calculation unit that calculates spectacle wearing parameters.
- the third image includes a first image in the spectacle frame wearing state and a second image in the spectacle frame non-wearing state. Is a composite image including at least a measurement position.
- the composite image includes a partial region of the first image in the spectacle frame wearing state and the second in the spectacle frame non-wearing state. It is a composite image with the corresponding area of the image of.
- the partial region is examined on the first image obtained by imaging the subject's face from the side.
- a computer that includes a display screen unit and an operation unit, and is used when measuring spectacle wearing parameters of a subject wearing a spectacle frame.
- Image processing means for preparing a third image associating each of the first image that is a face image in the eyeglass frame wearing state of the subject and the second image that is a face image in the eyeglass frame non-wearing state;
- Display control means for displaying the third image prepared by the image processing means on the display screen unit, and operation for specifying the measurement reference point of the spectacle wearing parameters on the third image displayed on the display screen unit by the operation unit
- a spectacle wearing parameter measurement program that functions as a control unit and a measurement calculation unit that calculates spectacle wearing parameters using data of a designated measurement reference point.
- the sixth aspect of the present invention is a measurement reference point on a face image required for measurement when measuring spectacle wearing parameters related to the subject using the face image of the subject wearing the spectacle frame.
- a third image in which the first image in the spectacle frame wearing state is associated with the second image in the spectacle frame non-wearing state is prepared and displayed, and the third image is displayed on the third image.
- a position designation method is characterized in that a measurement reference point of spectacle wearing parameters is designated.
- the position of the measurement reference point when measuring the spectacle wearing parameters, when specifying the position of the measurement reference point on the face image of the subject, the position of the measurement reference point can be specified.
- the present invention is used when measuring spectacle wearing parameters. More specifically, the face of the subject wearing the spectacle frame is imaged, and the face image as a result of the imaging is displayed on the screen, and a point serving as a measurement reference on the face image (for example, The spectacle wearing parameters are measured by calculating various spectacle wearing parameters based on the positions of the measurement reference points after designating the subject's corneal apex, the spectacle frame front frame, and the like. In the present invention, such spectacle wearing parameter measurement is performed using a spectacle wearing parameter measuring apparatus in which the apparatus main body (housing) is configured to be portable.
- the portable spectacle wearing parameter measuring device is not particularly limited in its configuration as long as it can be carried by a spectacle wearing parameter measurer (that is, an examiner for the subject) by hand. It is conceivable to use a portable tablet terminal device that is a computer having an imaging function, an image display function, an operation function, and an information processing function. If configured using a tablet terminal device, an imaging function, an image display function, an operation function, and an information processing function necessary and sufficient for measurement of spectacle wearing parameters can be obtained, and the cost is low in view of the widespread use in recent years. It can also be realized by this, and it can be said that it is very suitable for promoting introduction into an eyeglass store.
- a portable tablet terminal device generally employs a touch interface in which an operator touches an operation target and directly operates the device, thereby enabling clear operability.
- a tablet terminal device is used as a spectacle wearing parameter measurement device, a face image obtained by imaging the face of a subject wearing a spectacle frame is displayed and used as an operation target.
- a portion that is difficult to visually recognize may occur on the subject's face, which may deteriorate operability.
- the inventor of the present application has intensively studied.
- the inventor displays the face image of the subject wearing the spectacle frame and also displays the face image of the subject not wearing the spectacle frame to display the examiner (operation It is possible to avoid the occurrence of difficult-to-view parts on the subject's face and to suppress the deterioration in operability due to this.
- the inventor of the present application has further studied earnestly.
- the inventor of the present application prepares the imaging results of the face of the subject wearing the spectacle frame non-wearing state. By displaying them in a single display screen in association with each other, it is possible to easily grasp the state where there is no spectacle frame even in a portion that is difficult to visually recognize with the spectacle frame, and obtain a completely new idea that has not existed before. It came to.
- the present invention has been made based on the above-described new idea by the present inventors. That is, according to the present invention, a face image (first image) in the spectacle frame wearing state of the subject and a face image (second image) in the spectacle frame non-wearing state are respectively acquired, and the spectacle wearing parameter
- a (processed) image (third image) that associates each face image is generated and displayed on one display screen, and the measurement reference point is displayed on the processed image. It is characterized by specifying.
- FIG. 1 is an explanatory diagram illustrating a specific example of spectacle wearing parameters.
- the spectacle wearing parameters for example, the distance between the corneal apexes and the forward tilt angle of the frame when the subject wears the spectacle frame are known.
- the distance between the corneal apexes is the distance on the far visual axis A when the visual axis when the subject (glasses wearer) looks far is the far visual axis A.
- This is the distance CVD from the corneal apex of the eyeball E of the subject to the inner surface of the spectacle lens L framed in the spectacle frame F worn by the subject.
- the curvature of the inner surface of the spectacle lens L framed in the spectacle frame F varies depending on the spherical power and the astigmatism power prescribed to the subject.
- the measurement of spectacle wearing parameters is performed at the timing when the subject intends to purchase new spectacles, that is, the subject wears a spectacle frame in which a sample lens is framed at a spectacle store. It is common. Therefore, even if the corneal apex distance CVD is measured at a spectacle store, the measurement result does not necessarily reflect the prescription frequency of the subject. Further, in the state of being put in the spectacle frame F, the position of the inner surface of the spectacle lens L is often difficult to visually recognize.
- the frame corneal apex distance FVD is measured instead of the corneal apex distance CVD.
- the frame-corneal apex distance FVD is a distance on the far visual axis A when the subject (glasses wearer) takes the far visual axis A when viewed far.
- a line extends horizontally from the apex of the cornea of the eyeball E of the subject to the spectacle frame F worn by the subject in that state, and the center of the width of the upper rim at the outermost uppermost end of the spectacle frame F
- the distance from the intersection with the straight line connecting the center of the width of the lower rim at the lowermost outer periphery of the spectacle frame F is the corneal apex interframe distance.
- the distance to the intersection of the straight line connecting the upper and lower edge edges of the dummy lens attached to the spectacle frame F is the corneal vertex frame distance. It is.
- the distance to the intersection of the center of the width of the rim bar or the straight line connecting the center of the width of the brow bar and the midpoint of the edge of the edge of the dummy lens is This is the distance between frames.
- the prescription power of the spectacle lens L is determined, based on the measurement result of the frame cornea apex distance FVD, the refractive index of the lens substrate, the lens convex curve shape, the lens concave curve shape, the lens thickness, the frame front It is possible to uniquely derive the corneal apex distance CVD that reflects the prescription frequency etc. by performing geometric calculation etc. using the tilt angle, the warp angle of the frame, the forward tilt angle of the lens, the eye point, and the position of the bevel as calculation parameters. It becomes.
- the frame forward tilt angle generally refers to an angle formed by the temple and the rim of the spectacle frame F.
- a straight line orthogonal to the far vision axis A that is, vertical
- these spectacle wearing parameters are only one specific example. That is, the spectacle wearing parameters are not limited to these, as long as at least one of these parameters is included, and other parameters may be included. Other than these, for example, the fitting point position, the interpupillary distance, the frame warp angle, the near vision interpupillary distance, the eyeball rotation angle, and the like can be cited.
- FIG. 2A and 2B are explanatory diagrams showing a configuration example of the spectacle wearing parameter measurement apparatus according to the embodiment of the present invention, in which FIG. 2A is an external perspective view, and FIG. 2B is a functional block diagram.
- the spectacle wearing parameter measurement device 1 described in the present embodiment is configured using a portable tablet terminal device.
- the spectacle wearing parameter measurement device 1 in this embodiment is simply referred to as a “tablet terminal”.
- the tablet terminal 1 includes a portable device housing (main body) 10 that can be carried by a person who measures spectacles wearing parameters (that is, an examiner for a subject) by hand.
- the apparatus housing 10 includes an imaging camera unit 11 having a CCD (Charge Coupled Device) sensor or a CMOS (Complementary Metal-Oxide Semiconductor) sensor, and a flat panel display such as an LCD (Liquid Crystal Display) panel.
- a display screen unit 12 is provided, and an information processing unit 15 (not shown in FIG. 2A) having a CPU (Central Processing Unit) is provided.
- the display screen unit 12 is provided with an operation unit 12a that realizes a touch interface.
- the touch interface is a user interface that can be operated by touching the display of the display screen unit 12.
- the tablet terminal 1 functions as a computer having an imaging function, an image display function, an operation function, and an information processing function.
- the operation of the operation unit 12a by the touch interface may be performed using a touch pen as shown in the figure, but may be performed directly with the operator's finger.
- the operation unit 12a is not based on a touch interface, and an information input device such as a keyboard or a mouse connected to the tablet terminal 1 may be used.
- the tablet terminal 1 detects an angular velocity in the device housing 10 as shown in FIG.
- a gyro sensor 13 which is a device to be operated and a memory unit 14 made of a nonvolatile memory are provided.
- the gyro sensor 13 is used for grasping the posture state of the apparatus housing 10 and the like. As the gyro sensor 13, what the tablet terminal 1 originally has may be used.
- the memory unit 14 stores a predetermined program necessary for processing operation of the information processing unit 15 in addition to the image data obtained by the imaging camera unit 11 and various data input by the operation unit 12a.
- the information processing unit 15 functions as an imaging control unit 15a, an image processing unit 15b, a display control unit 15c, an operation control unit 15d, and a measurement calculation unit 15e. It has become.
- the imaging control unit 15a controls the operation of the imaging camera unit 11.
- the operation control of the imaging camera unit 11 includes control of whether or not the shutter of the imaging camera unit 11 is operable. Specifically, the imaging control unit 15a permits the operation of the shutter only when the posture of the apparatus housing 10 is in a predetermined state.
- the image processing means 15b performs predetermined image processing on the face image of the subject that is the imaging result obtained by the imaging camera unit 11. Specifically, the image processing means 15b includes, as one of the predetermined image processes, the first image obtained by the imaging camera unit 11 in the eyeglass frame wearing state and the second image in the eyeglass frame non-wearing state. A processed image (third image) in which these images are associated with each other is generated. More specifically, a composite image obtained by combining the images is generated as a processed image in which the images are associated with each other.
- the corresponding area of the first image in the eyeglass frame wearing state of the same subject is fitted in a partial area of the second image in the eyeglass frame non-wearing state of the subject (both areas) Is obtained by so-called superimposing synthesis.
- the partial area and the corresponding area that are to be superimposed are combined on the face side image obtained by imaging the subject's face from the side.
- the display control means 15c controls the operation of the display screen unit 12.
- the operation control of the display screen unit 12 includes control of image contents displayed on the display screen unit 12.
- the display control unit 15 c causes the display screen unit 12 to display the face image (that is, the image before imaging) of the subject that is an imaging target by the imaging camera unit 11 on the display screen unit 12. It functions as an imaging finder of the imaging camera unit 11.
- the display control unit 15c displays the face image of the subject (that is, the captured image) as a result of imaging by the imaging camera unit 11 on the display screen unit 12, thereby performing the operation on the operation unit 12a performed thereafter. It is designed for operation.
- the display control unit 15c displays a processed image (specifically, for example, a superimposed image) generated by the image processing unit 15b on the display screen unit 12 as an imaging result of the imaging camera unit 11. It shall be displayed.
- the operation control means 15d controls the operation of the operation unit 12a.
- the operation control of the operation unit 12a includes position recognition of a point designated by the operation unit 12a.
- the operation control means 15d designates a point on the face image of the subject displayed on the display screen unit 12 by the operation unit 12a, so that the measurement reference point necessary for measuring the spectacle wearing parameters is determined. The position on the display image is recognized.
- the measurement calculation means 15e is for obtaining spectacle wearing parameters relating to the subject. Specifically, the measurement calculation unit 15e performs calculation processing for obtaining spectacle wearing parameters related to the subject based on the measurement reference point specified by the operation unit 12a while using the imaging result obtained by the imaging camera unit 11. It is like that. In the present embodiment, the measurement calculation means 15e is also referred to as a calculation unit.
- These means 15a to 15e are realized by the information processing unit 15 reading and executing a predetermined program in the memory unit 14. That is, the functions as the respective means 15a to 15e in the tablet terminal 1 are realized by a predetermined program in the memory unit 14 (that is, an embodiment of the spectacle wearing parameter measurement program according to the present invention).
- the spectacle wearing parameter measurement program is installed and used in the memory unit 14, but is provided by being stored in a storage medium readable by the tablet terminal 1 prior to the installation. Alternatively, it may be provided to the tablet terminal 1 through a communication line connected to the tablet terminal 1.
- the information processing unit 15 in the apparatus housing 10 functions as the measurement calculation unit 15e, that is, when the measurement calculation unit 15e performs calculation processing for obtaining spectacle wearing parameters in the apparatus housing 10.
- the information processing unit 15 and the other device on the communication line are configured to be communicable through a wireless or wired communication line connected to the tablet terminal 1, for example, the other device has glasses. You may make it bear the function to perform the calculation process which calculates
- the function and the like as the measurement calculation unit 15e by the information processing unit 15 are as follows: Like so-called cloud computing, other devices on the communication line may be substituted.
- FIG. 3 is a flowchart showing an example of the procedure of the spectacle wearing parameter measurement method according to the embodiment of the present invention.
- the spectacle wearing parameter measurement method described in the present embodiment at least the face side of the subject wearing the spectacle frame and the face side of the subject not wearing the spectacle frame are imaged. Based on the first image (face image in the spectacle frame wearing state) and the second image (face image in the spectacle frame non-wearing state), which are the imaging results, the intercorneal vertex distance FVD and the frame forward tilt angle ⁇ are obtained. By determining, the spectacle wearing parameters are measured.
- a spectacle wearing parameter measurer that is, an examiner such as a spectacle store clerk
- a spectacle wearing parameter examinee that is, a spectacle store customer or the like
- the tablet terminal 1 on which the measurement program is installed as an application program is started up (step 101; hereinafter, step is abbreviated as “S”).
- the subject prepares a spectacle frame to be worn.
- the portable tablet terminal 1 is used for imaging of the subject, the subject can be moved to the device installation location or specified to the subject, unlike the case of using a fixed measuring device. There is no need to let the posture. Up to this point, this corresponds to the “preparation stage” in the spectacle wearing parameter measurement method of the present embodiment.
- the examiner presses the shutter button of the imaging camera unit 11 while using the imaging camera unit 11 in the tablet terminal 1 while holding the tablet terminal 1 in the hand,
- the face side of the subject wearing the spectacle frame is imaged (S102), and then the face side is imaged without wearing the spectacle frame (S103).
- the tablet terminal 1 acquires at least a face side image in the eyeglass frame wearing state of the subject and a face side image in the subject eyeglass frame non-wearing state, respectively. Up to this point, this corresponds to the “imaging stage” in the spectacle wearing parameter measurement method of the present embodiment.
- the examiner operates the tablet terminal 1 and measures various spectacle wearing parameters based on the imaging result obtained in the imaging stage. Specifically, the tablet terminal 1 obtains at least the frame forward tilt angle ⁇ (S104), measures the frame vertical width of the spectacle frame worn by the subject (S105), and then determines between the frame cornea vertices. The distance FVD is obtained (S106). Up to this point, this corresponds to the “measurement stage” in the spectacle wearing parameter measurement method of the present embodiment. And the tablet terminal 1 preserve
- the tablet terminal 1 preserve
- the spectacle wearing parameters are measured through a preparation stage, an imaging stage, and a measurement stage.
- the steps are not necessarily performed in order, and may be performed in parallel.
- the measurement stage may be started to determine the frame forward tilt angle ⁇ (S104).
- FIG. 4 is an explanatory diagram showing a specific example of the contents displayed on the imaging finder of the spectacle wearing parameter measurement device according to one embodiment of the present invention, in which the first image is taken in the spectacle frame wearing state of the subject. It is a figure which shows the display content required for.
- FIG. 5 is an explanatory diagram showing a specific example of the content displayed on the imaging finder, and is a diagram showing the display content when the subject's face is imaged from the side.
- the tablet terminal 1 When the first image of the subject wearing the eyeglass frame is captured, the tablet terminal 1 first enters the imaging mode for the eyeglass frame wearing state in accordance with a predetermined operation by the examiner who performs the imaging.
- the tablet terminal 1 that has entered the imaging mode for the spectacle frame wearing state follows the control by the display control unit 15c, and in the imaging viewfinder by the display screen unit 12 (that is, gravity).
- Direction and a second reference line 32 consisting of a straight line extending in the vertical direction of the imaging finder, and a shutter button used for imaging. 33 is displayed.
- the first reference line 31, the second reference line 32, and the shutter button 33 are displayed on the display screen unit 12.
- the first reference line 31 is displayed so as to always extend in the vertical direction and the horizontal direction regardless of the posture of the device housing 10 of the tablet terminal 1. That is, regardless of the posture of the apparatus housing 10, the display is always fixed with respect to the direction of gravity. Such a first reference line 31 can be displayed in the imaging finder by using the function of the gyro sensor 13.
- the second reference line 32 is always fixedly displayed with respect to the angle of view of the display screen unit 12. Therefore, when the posture of the device housing 10 of the tablet terminal 1 changes, the direction in which the second reference line 32 extends changes accordingly.
- the 1st reference line 31 and the 2nd reference line 32 are displayed so that each can be identified. Specifically, it may be possible to identify each display color by making it different.
- the shutter button 33 is pressed by the examiner in order to perform imaging with the imaging camera unit 11.
- the shutter button 33 can be pressed only when the device housing 10 of the tablet terminal 1 is in a posture that can be regarded as standing in the vertical direction. Shall be. Specifically, when the examiner holds the apparatus housing 10 by hand, assuming that the state in which the apparatus housing 10 stands in the vertical direction is 90 °, the front-rear direction (the arrow direction in the figure) It is assumed that the shutter button 33 can be pressed only when the inclination of the shutter button is within ⁇ 5 °, for example. Such a pressing restriction on the shutter button 33 can also be realized by using the function of the gyro sensor 13.
- the examiner determines that the face side surface of the subject in the eyeglass frame wearing state is an imaging target in the imaging camera unit 11. To do. Specifically, the examiner puts the eyeglass frame on the examinee and holds the tablet terminal 1 in his / her hand so as to face the side face of the subject wearing the eyeglass frame. The face side of the subject is displayed in the imaging finder by the display screen unit 12 of the tablet terminal 1.
- the examiner sets the second reference line 32 displayed in the imaging finder to match the rim center line in the spectacle frame F worn by the examinee.
- the position where the terminal 1 is held is adjusted by moving it in the direction of rotation (the arrow direction in the figure).
- the tablet terminal 1 may give guidance to the examiner about matching the second reference line 32 with the rim center line.
- the guidance may be performed by the imaging control unit 15a displaying character information on the display screen unit 12, but the guidance is not limited to this and may be performed by voice output.
- the examiner presses the shutter button 33 in that state.
- the imaging camera unit 11 captures an image displayed on the imaging finder.
- An image as a result of imaging by the imaging camera unit 11 (that is, an image of the side face of the subject wearing the eyeglass frame) is combined with position information of the first reference line 31 and the second reference line 32 on the image.
- the display control means 15c may be configured to be able to move the position of the second reference line 32 on the screen displayed by the display screen unit 12 while following the operation contents of the operation unit 12a by the examiner. In this way, the examiner can finely adjust the position of the second reference line 32 on the image that is the imaging result even after imaging of the face side face in the eyeglass frame wearing state of the subject. .
- the display content on the display screen unit 12 is stored in the memory unit 14 as the imaging result of the first image of the subject wearing the eyeglass frame. Will be.
- the second reference line 32 displayed in the imaging finder is The imaging is performed so as to match the rim center line in the spectacle frame F worn by the person.
- the frame forward tilt angle ⁇ which is one of the spectacle wearing parameters, can be obtained. It will be possible to ask.
- the first image of the subject wearing the eyeglass frame obtained by imaging is stored in the memory unit 14 and then read out from the memory unit 14 to store the first image of the tablet terminal 1. It can be displayed on the display screen unit 12 and reused.
- the display control unit 15c that causes the display screen unit 12 to display the first image rotates the first image so that the position of the second reference line 32 overlaps the position of the first reference line 31.
- the image processing unit 15b may perform image editing processing for moving in the direction. After such image editing processing, the display screen unit 12 is in a state in which the position adjustment amount obtained by moving the tablet terminal 1 in the rotational direction at the time of imaging is corrected (that is, the vertical direction of the first image).
- the first image in the state of wearing the eyeglass frame of the subject is displayed in a state where the horizontal direction is along the edge that forms the angle of view of the display screen unit 12.
- the tablet terminal 1 that is in the imaging mode for the glasses frame non-wearing state performs imaging in the imaging finder by the display screen unit 12 as shown in FIG. 5B while following the control by the display control unit 15c. And a guide image 34 corresponding to the imaging result of the first image in the eyeglass frame wearing state of the subject. As a result, in addition to the image obtained through the imaging camera unit 11, the shutter button 33 and the guide image 34 are displayed on the display screen unit 12.
- the guide image 34 is obtained by performing a predetermined image editing process on the imaging result obtained in the imaging process (S102) of the first image in the spectacle frame wearing state.
- a predetermined image editing process in addition to the image editing process for correcting the position adjustment amount described above, there is an image editing process for adjusting the transparency of the image to make it translucent.
- the transparency of the image may be adjusted using a known technique. Specifically, it is conceivable to adjust the transparency within a range of 20% to 40%, preferably about 30%. If the transparency is adjusted in this way, even when the guide image 34 is displayed, other images can be seen through the guide image.
- the examiner sets the imaging camera unit 11 as the imaging target for the face side face of the subject in the state where the eyeglass frame is not worn. Specifically, the examiner removes the spectacle frame worn by the subject and holds the tablet terminal 1 in his / her hand so as to face the side face of the subject who is not wearing the spectacle frame. Then, the face side of the subject is displayed in the imaging finder by the display screen unit 12 of the tablet terminal 1.
- the examiner displays the outline of the second image in the eyeglass frame non-wearing state displayed in the imaging finder through the imaging camera unit 11 in the imaging finder.
- the position where the tablet terminal 1 is held is adjusted so as to match the contour of the guide image 34 that is being held.
- the tablet terminal 1 may provide guidance to the examiner about matching the contour of the second image in the glasses frame non-wearing state with the guide image 34.
- the guidance may be performed by the imaging control unit 15a displaying character information on the display screen unit 12, but the guidance is not limited to this and may be performed by voice output.
- the examiner presses the shutter button 33 in that state.
- the imaging camera unit 11 captures an image displayed on the imaging finder.
- An image that is a result of imaging by the imaging camera unit 11 (that is, an image of the face side surface when the subject's eyeglass frame is not worn) is temporarily displayed on the display screen unit 12 together with the guide image 34.
- the display control unit 15c moves the position on the screen displayed by the display screen unit 12 while following the operation content of the operation unit 12a by the examiner with respect to the image that is the imaging result by the imaging camera unit 11.
- the size may be enlarged or reduced. In this way, even after imaging of the side face of the subject when the eyeglass frame is not worn, the second image is obtained so that the contour of the second image as the imaging result completely matches the guide image 34. Can be fine-tuned by the examiner.
- the display content on the display screen unit 12 is stored in the memory unit 14 as the imaging result of the second image when the subject's eyeglass frame is not worn. Will be.
- the tablet terminal 1 described in the present embodiment captures the first image in the eyeglass frame wearing state of the subject when capturing the second image in the eyeglass frame non-wearing state of the subject.
- the imaging is performed so as to match the guide image 34 based on the result. If imaging is performed in this way, the first image in the eyeglass frame wearing state of the subject and the image within the angle of view are already obtained for the second image in the eyeglass frame non-wearing state of the subject. Can be obtained with substantially the same arrangement and size.
- the second image of the subject wearing the eyeglass frame that is not worn is read out from the memory unit 14 after the data is stored in the memory unit 14, whereby the tablet terminal 1. Can be displayed and reused.
- the tablet terminal 1 in the forward tilt measurement mode reads out the first image in the eyeglass frame wearing state of the subject from the memory unit 14 and displays it on the display screen unit 12 while following the control by the display control unit 15c. And in the tablet terminal 1, the measurement calculating means 15e performs the calculation process which calculates
- the measurement calculating means 15e calculates
- the frame forward tilt angle ⁇ obtained by the measurement calculation means 15e in this way is displayed in a predetermined window in the screen of the display screen unit 12 while being controlled by the display control means 15c. If there is no problem as a result of confirmation by the examiner, the calculation processing result is stored in the memory unit 14.
- the spectacle wearing parameters are calculated and obtained based on the face image that is the imaging result of the subject's face.
- the spectacle wearing parameters specified by the distance magnitude such as the frame-corneal apex distance FVD, are calculated and calculated in order to calculate the distance magnitude on the face image and the actual distance in the real space. Calibration that correlates the magnitude of the distance is required.
- the spectacle frame vertical width measurement process (S105) is performed on the spectacle frame F worn by the subject.
- the tablet terminal 1 enters the spectacle frame vertical width measurement mode in accordance with a predetermined operation by the examiner.
- FIG. 6 is an explanatory diagram showing a specific example of display contents on the display screen when the spectacle wearing parameter measurement apparatus according to an embodiment of the present invention obtains spectacle wearing parameters, and shows the spectacle frame worn by the subject. It is a figure which shows the display content at the time of measuring a frame vertical width.
- the tablet terminal 1 that has entered the spectacle frame length measurement mode follows the control of the display control unit 15c, along the long side of the screen within the screen of the display screen unit 12, as shown in FIG.
- a third reference line 35 made of an extending straight line and fourth reference lines 36a and 36b made of two straight lines arranged in parallel with the third reference line 35 are displayed.
- the third reference line 35 is fixedly displayed in the vicinity of the intermediate point in the vertical direction of the screen on the display screen unit 12.
- the display of the third reference line 35 is not essential, and the display may be omitted.
- the fourth reference lines 36a and 36b are displayed so as to sandwich the third reference line 35, respectively.
- fourth reference lines 36a and 36b can be moved independently within the screen while maintaining a parallel state with the third reference line 35.
- the movement of the fourth reference lines 36a and 36b in the screen is performed while following the operation contents of the operation unit 12a by the examiner.
- the examiner displays the screen on the display screen unit 12 as shown in FIG.
- the eyeglass frame F worn by the subject is placed in a single state.
- the examiner places the spectacle frame F on the screen so that the datum line of the spectacle frame F is aligned with the third reference line 35.
- the 3rd reference line 35 is used as a guide for mounting spectacles frame F, it will become a thing convenient for an examiner.
- the third reference line 35 is displayed, it is not necessary to use the screen peripheral area of the display screen unit 12 when measuring the spectacle frame vertical width, which will be described later, so that the measurement can be performed precisely. .
- each 4th reference line 36a, 36b corresponds with the magnitude
- the measurement calculation means 15e causes the actual distance between the fourth reference lines 36a and 36b.
- the measurement calculation means 15e recognizes the size of the interval between the fourth reference lines 36a and 36b based on the number of pixels in the display screen unit 12, and the actual size per pixel in the recognized number of pixels.
- the actual distance between each of the fourth reference lines 36a and 36b is obtained by multiplying by and the calculation processing result is set as the frame vertical width of the spectacle frame F.
- the calculation result of the frame vertical width obtained by the measurement calculation means 15e in this way is displayed on the predetermined window 37 in the screen of the display screen unit 12 while being controlled by the display control means 15c. If there is no problem as a result of confirmation by the examiner, the calculation processing result is stored in the memory unit 14.
- the tablet terminal 1 described in the present embodiment is configured to measure the spectacle frame vertical width of the spectacle frame F worn by the subject for calibration necessary for measurement of spectacle wearing parameters (S105). )I do.
- the tablet terminal 1 according to the present embodiment performs the spectacle frame vertical width measurement process (S105), with the spectacle frame F placed on the screen of the display screen unit 12, and the frame vertical width of the spectacle frame F. Is converted into the number of pixels in the display screen unit 12, and then the size of the frame vertical width is obtained by arithmetic processing. Accordingly, it is not necessary to physically measure the frame vertical width of the spectacle frame F with a scale or the like, and it is not necessary to input the value of the measurement result to the tablet terminal 1, and the spectacle frame vertical width measurement process (S 105).
- the tablet terminal 1 can then perform the measurement process (S106) of the intercorneal vertex distance FVD.
- the tablet terminal 1 enters the frame-corneal apex distance measurement mode according to a predetermined operation by the examiner.
- the tablet terminal 1 that has entered the frame-corneal apex distance measurement mode reads out the imaging result obtained in the imaging process (S102, S103) from the memory unit 14 while following the control by the display control unit 15c, and displays it on the display screen unit 12. It is displayed and used for the operation by the operation unit 12a performed by the examiner thereafter. However, at this time, in the tablet terminal 1, the function as the image processing unit 15 b in the information processing unit 15 performs image processing as described below.
- FIG. 7 is an explanatory diagram showing a specific example of image composition processing performed by the spectacle wearing parameter measurement device according to one embodiment of the present invention.
- the image processing means 15b reads out from the memory unit 14 a first image 41 that is an imaging result of the face side surface of the subject in the spectacle frame wearing state. Further, as shown in FIG. 7B, the image processing unit 15 b reads out from the memory unit 14 a second image 42 that is an imaging result of the face side surface of the subject in the state where the eyeglass frame is not worn.
- the image processing means 15b When the first image 41 in the spectacle frame wearing state and the second image 42 in the spectacle frame non-wearing state are read out, the image processing means 15b performs superimposing synthesis on these images 41 and 42. Perform the necessary image processing.
- the image processing unit 15 b extracts data of the partial area 43 of the first image 41 in the spectacle frame wearing state, and the partial area 43. Erase data in other areas except for (see hatched area in the figure).
- the “partial region” at this time has a predetermined position, size, range, and the like with respect to the entire image, and includes at least the rim portion of the spectacle frame F worn by the subject. This is a region set so as not to include the temple portion of F and the eyeball cornea portion of the subject.
- the partial area 43 may be rectangular as shown in the figure, but is not limited to this, and even if it is set to another shape such as a circular shape. Good.
- the image processing means 15b erases the data of the corresponding area 44 corresponding to the partial area 43 described above with respect to the face side image 42 in the glasses frame non-wearing state (in the figure). (See hatching).
- the “corresponding area” at this time is determined to have the same position, size, range, and the like as the partial area 43 so as to correspond to the partial area described above. Therefore, the corresponding region 44 is also set so as not to include the eyeball cornea portion of the subject as in the partial region 43 described above.
- the outer shape of the corresponding region 44 may be any of a rectangular shape or a circular shape as long as it is the same as the partial region 43 described above.
- the association between the partial area 43 and the corresponding area 44 is performed based on the position information of the pixels constituting the images 41 and 42.
- the first image 41 in the spectacle frame wearing state and the second image 42 in the spectacle frame non-wearing state are captured so as to have the same angle of view. This is because the arrangement and size of the images in the corners are substantially the same.
- the present invention is not necessarily limited to this, and the partial area 43 and the corresponding area 44 may be associated with each other by another method.
- another method for example, after recognizing the shape of an image element (such as a subject's ear or a rim of a spectacle frame) that exists in common in each of the images 41 and 42, the image element in each is matched.
- the partial area 43 and the corresponding area 44 are associated with high accuracy with reference to the positional relationship with the image element.
- the image processing means 15b converts the partial region 43 in the first image 41 in the spectacle frame wearing state into the corresponding region 44 in the second image 42 in the spectacle frame non-wearing state. Superimpose synthesis is performed on these images 41 and 42 so as to fit in the image. As a result, the image processing means 15b combines the first image 41 in the spectacle frame wearing state and the second image 42 in the spectacle frame non-wearing state to obtain one composite image (third image) 45. It will be.
- the composite image 45 corresponds to an aspect of a processed image in which the images 41 and 42 are associated with each other.
- a partial region 43 in the first image 41 in the spectacle frame wearing state is changed to a corresponding region 44 in the second image 42 in the spectacle frame non-wearing state. It will be replaced. Therefore, if such superimpose synthesis is performed, the image portion of the spectacle frame is partially deleted from the synthesized image as necessary on one synthesized image 45 obtained as a result.
- the tablet terminal 1 After performing the image composition processing as described above, the tablet terminal 1 displays one composite image 45 obtained by the image composition processing on the display screen unit 12 and then displays the frame-corneal vertex distance FVD to the examiner.
- the measurement reference point necessary for the measurement is specified.
- FIG. 8 is an explanatory diagram showing a specific example of display contents on the display screen when the spectacle wearing parameter measurement apparatus according to an embodiment of the present invention obtains spectacle wearing parameters, and in the case of obtaining the frame cornea apex distance. It is a figure which shows a display content.
- the tablet terminal 1 that is in the frame-corneal apex distance measurement mode follows the control by the display control unit 15c, and the display screen unit 12 performs the above-described operation as shown in FIGS. 8 (a) and 8 (b).
- One composite image 45 obtained by the image composition processing is displayed, and pointer images 53 and 54 are superimposed on the composite image 45 and displayed.
- the pointer images 53 and 54 are graphic images that serve as a guide for specifying the position of the point to be specified by the operation unit 12a when specifying the measurement reference point by operating the operation unit 12a.
- the pointer image 53 is used when designating the position of the corneal apex on the face side of the subject as a measurement reference point.
- the pointer image 54 is used when the upper end position and the lower end position of the rim in the spectacle frame F worn by the subject are designated as measurement reference points.
- the graphic pattern shapes constituting the pointer images 53 and 54 may be set in advance considering the operability by the examiner and the visibility of the composite image 45 to be overlaid, and are particularly limited. is not.
- the tablet terminal 1 After the pointer images 53 and 54 are displayed superimposed on the composite image 45, the tablet terminal 1 operates the operation unit 12a on the screen of the display screen unit 12 as shown in FIG. A movable pointer image 53 is positioned at the apex of the cornea on the composite image 45 being displayed. At this time, the composite image 45 serving as the background is obtained by superimposing and performing partial deletion of the image portion of the spectacle frame from the face image as necessary. Therefore, when aligning the pointer image 53 with the corneal apex position, a portion that is difficult to visually recognize does not occur in the vicinity of the cornea of the subject's face.
- the examiner operates the operation unit 12 a to combine the pointer image 54 that can be moved within the screen of the display screen unit 12 during display.
- the eyeglass frame F on the image 45 is positioned at the upper and lower ends of the rim.
- the center point in the pointer image 53 arranged at the corneal apex position is the frame cornea apex distance FVD. It is designated as one of the measurement reference points for obtaining, and the center points in the pointer image 54 arranged at the upper and lower ends of the rim of the spectacle frame F are the remaining measurement references for obtaining the frame-corneal apex distance FVD. It will be specified as a point.
- the display control means 15c A partial enlarged window image 55 for enlarging and displaying the peripheral area is displayed at a predetermined location in the screen of the display screen unit 12. In this way, even when the pointer images 53 and 54 are moved by operating the touch interface, the part touched by the touch interface is changed to a predetermined part different from the part by the partial enlarged window image 55. Since the display is enlarged, the operability when the examiner moves and aligns the pointer images 53 and 54 can be improved.
- the measurement calculation means 15e causes the pointer image 53 positioned at the cornea apex.
- the intersection of the straight line passing through the center of the frame and the straight line connecting the centers of the pointer images 54 at the upper and lower ends of the rim of the spectacle frame F is obtained.
- the measurement calculation means 15e calculates
- the measurement of the intercorneal vertex distance FVD at this time is performed on the composite image 45 displayed on the display screen unit 12. Therefore, in measuring the frame-corneal apex distance FVD, calibration (calibration) that associates the size in the real space with the size on the composite image 45 is necessary.
- the calibration obtains the frame vertical width of the spectacle frame F in the spectacle frame vertical width measurement process (S105) described above. It is conceivable to perform this by associating with the distance on the composite image 45 between the pointer images 54 arranged at the upper and lower ends of the image.
- the distance corneal apex distance FVD obtained by the measurement calculation means 15e in this way is displayed on the predetermined window 56 in the screen of the display screen unit 12 while being controlled by the display control means 15c. If there is no problem as a result of confirmation by the examiner, the calculation processing result is stored in the memory unit 14.
- the characteristic procedure for measuring the spectacle wearing parameters in the present embodiment has been described above.
- the tablet terminal 1 may perform other procedures other than the characteristic procedure described above.
- Other procedures include imaging processing of the upper face of the subject in the imaging stage and imaging processing of the front face of the subject, measurement processing of the frame warp angle ⁇ in the measurement stage, measurement processing of the fitting point position FP, and measurement of the interpupillary distance PD. Processing and the like.
- the detailed description is abbreviate
- various spectacle wearing parameters are measured using the portable tablet terminal 1. Therefore, installation space like a non-portable large-scale measuring device is not required, and introduction into an eyeglass store can be facilitated. In this respect, it is convenient for an examiner (such as a store clerk of an eyeglass store) who measures various spectacle wearing parameters.
- the first image in the eyeglass frame wearing state of the subject and the second image in the eyeglass frame non-wearing state are respectively picked up and acquired, and the imaging result for the eyeglass frame wearing state is obtained.
- the imaging result of the glasses frame non-wearing state are combined and displayed on a single composite image, and the measurement reference point required for obtaining the spectacle wear parameters on the single composite image (third image) is displayed. It is designed to specify. That is, in addition to the imaging results of the face image of the subject wearing the eyeglass frame, the imaging results of the face image of the subject wearing the eyeglass frame are prepared, and the imaging results are partially imaged.
- a composite process is performed and displayed on the display screen unit 12 as a single composite image.
- the image portion of the spectacle frame can be partially deleted as necessary on one composite image after the image composition processing through the image composition processing described above. become.
- the spectacle frame shape worn by the subject can be caused by the spectacle frame shape. It is possible to prevent the examiner's face from becoming difficult to see. For example, even if the subject wears a spectacle frame with a large temple width, the cornea vertex of the subject is hidden in the temple of the spectacle frame on the face image by deleting the temple portion. Can be prevented.
- the measurement reference point to be specified when specifying the measurement reference point necessary for obtaining the spectacle wearing parameters, can be specified by partially deleting the image portion of the spectacle frame as necessary.
- the position of the measurement reference point can be easily specified, and as a result, the position of the measurement reference point can be specified easily. Can be secured.
- a part of the imaging result for the spectacle frame wearing state is fitted to the corresponding region of the imaging result for the spectacle frame non-wearing state. If the superimposing composition is performed, only the necessary part of the imaging result in the spectacle frame wearing state (that is, a partial region of the imaging result) is used as the imaging result in the spectacle frame non-wearing state (that is, The corresponding area of the imaging result can be replaced. Therefore, according to the present embodiment, only the part necessary for designating the measurement reference point is surely replaced with the face image for the glasses frame non-wearing state. That is, it is possible to reliably delete the image portion of the spectacle frame that is unnecessary when specifying the measurement reference point, and as a result, it is possible to easily and accurately specify the position of the measurement reference point.
- the temple of the eyeglass frame hides the corneal apex of the subject on the face image as described above.
- the target region for superimposition synthesis that is, the partial region and the relevant region.
- the region includes a rim portion of the spectacle frame to be worn, but is set so as not to include the temple portion of the spectacle frame and the eyeball cornea portion of the subject.
- the position of the measurement reference point to be specified is not obscured even when the temple of the eyeglass frame hides the corneal apex of the subject on the face image.
- the present invention is very suitable when applied to the measurement of the intercorneal vertex distance FVD, which is one of the spectacle wearing parameters.
- a composite image (third image) of the first image in the spectacle frame wearing state and the second image in the spectacle frame non-wearing state a partial region of one image corresponds to the other image.
- a composite image according to another composition mode may be displayed.
- an image obtained by superimposing images in a state where the transparency is different can be cited.
- the first image in the spectacle frame wearing state and the second image in the spectacle frame non-wearing state need to be displayed in a combined state as long as they are displayed in association with each other. Absent.
- the present invention generates and displays a processed image (third image) in which the first image in the spectacle frame wearing state and the second image in the spectacle frame non-wearing state are associated with each other,
- the measurement reference point may be designated on the processed image.
- association means that the relevance of each image can be recognized when the measurement reference point is designated.
- the processed images in which the images are associated with each other include the following images in addition to the composite image described in the present embodiment. That is, as the processed image, the first image in the spectacle frame wearing state and the second image in the spectacle frame non-wearing state are displayed side by side, and the position is adjusted and / or the size is adjusted, respectively.
- the pointer image is processed so that the pointer image moves synchronously at the same position on the image.
- the first image in the spectacle frame wearing state and the first in the spectacle frame non-wearing state are not limited to such an example, so that it is easy to visually recognize a location necessary for specifying the measurement reference point regardless of the presence or absence of the spectacle frame.
- the second image is processed and displayed, it corresponds to the “processed image (that is, the third image)” in the present invention.
- each image with the frame wearing state and without the frame as described above is divided by a vertical straight line located between the apex of the cornea and the front part of the glasses (the part where the spectacle lens is attached), and then the frame wearing state is obtained.
- the information processing unit 15 acquires a first image in the eyeglass frame wearing state of the subject and a second image in the eyeglass frame non-wearing state, rather than newly generating a composite image, A third image associated with each image is prepared.
- the processing procedure when measuring the frame-corneal apex distance FVD is mainly given as an example. Therefore, in the present embodiment, a case is described in which an image of the subject's face side surface is combined to form a combined image.
- the present invention is not limited to this, and in addition to the subject's face side, the same image composition processing as in the present embodiment is performed on the subject's upper face and front face. It is also possible to do so. For example, if the eye point position on the sunglasses is specified while wearing sunglasses, it may not be easy to confirm the position of the cornea due to the shading action of the sunglasses.
- a measurement auxiliary tool on which a measurement reference scale with a known figure size (that is, a size in real space) is drawn is imaged together with the face of the subject.
- a measurement reference scale with a known figure size that is, a size in real space
- calibration is performed to associate the size in the real space with the size on the face side composite image, and the face side composite image
- image data obtained by the imaging camera unit 11 is used, but other image data may be used.
- image data captured by the imaging camera unit 11 of the tablet terminal 1 image data obtained by imaging a subject with another imaging device may be used. It is a preferable example to provide the imaging camera unit 11 in the tablet terminal 1.
- SYMBOLS 1 Glasses wearing parameter measurement apparatus (tablet terminal), 10 ... Apparatus housing, 11 ... Imaging camera part, 12 ... Display screen part, 12a ... Operation part, 13 ... Gyro sensor, 14 ... Memory part, 15 ... Information processing part , 15a ... imaging control means, 15b ... image synthesis means, 15c ... display control means, 15d ... operation control means, 15e ... measurement calculation means (calculation unit), 41 ... first image, 42 ... second image, 43 ... partial area 44 ... corresponding area 45 ... composite image (third image)
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Abstract
Description
測定基準点の位置指定は、被検者の顔画像を表示する画面上で行う。例えば、眼鏡装用パラメータとして角膜頂点間距離を測定する場合であれば、被検者の顔側面を撮像して得られる顔画像上で、その被検者の角膜頂点の位置を測定基準点の一つとして指定することになる。
ところが、眼鏡装用パラメータの測定およびそのための測定基準点の位置指定に用いる画像は、眼鏡フレームを装用した状態の被検者の顔を撮像して得られるものである。そのため、被検者が装用している眼鏡フレームの形状によっては、被検者の顔について視認困難な箇所が生じてしまい、指定すべき測定基準点の位置が不明確になってしまう可能性がある。具体的には、例えばプラスチック系素材の眼鏡フレームはテンプル幅が大きいものも存在しており、顔画像上において眼鏡フレームのテンプルに被検者の角膜頂点が隠れてしまうといったことが起こり得る。そのような場合には、測定基準点の位置指定を簡便に行うことができず、また指定後の測定基準点の位置について必要十分な位置精度を確保できないおそれがある。
そして特許文献2に記載のように、テンプル幅の大きい眼鏡フレームを使用する場合、眼鏡フレームに隠れて角膜が見えなくなってしまう場合がある。そのような場合には、測定基準点の位置指定を簡便に行うことができず、また指定後の測定基準点の位置について必要十分な位置精度を確保できないおそれがある。そのため、角膜頂点を含む装用パラメータの距離の測定が困難となる場合がある。
本発明の第1の態様は、眼鏡フレームを装用する被検者の眼鏡装用パラメータについて測定を行う際に用いられる眼鏡装用パラメータ測定装置であって、被検者の眼鏡フレーム装用状態における顔画像である第1の画像と眼鏡フレーム非装用状態における顔画像である第2の画像とをそれぞれ取得し、第1の画像と第2の画像とを関連付けた第3の画像を準備する情報処理部と、情報処理部が準備した画像を表示する表示画面部と、表示画面部が表示する画像上で眼鏡装用パラメータの測定基準点の指定を行う操作部と、指定された測定基準点のデータを用いて眼鏡装用パラメータを算出する演算部と、を備えることを特徴とする眼鏡装用パラメータ測定装置である。
本発明の第2の態様は、第1の態様に記載の眼鏡装用パラメータ測定装置において、第3の画像は、眼鏡フレーム装用状態における第1の画像と眼鏡フレーム非装用状態における第2の画像とを合成した少なくとも測定位置を含む合成画像であることを特徴とする。
本発明の第3の態様は、第2の態様に記載の眼鏡装用パラメータ測定装置において、合成画像は、眼鏡フレーム装用状態における第1の画像の一部領域と、眼鏡フレーム非装用状態における第2の画像の該当領域との合成画像であることを特徴とする。
本発明の第4の態様は、第3の態様に記載の眼鏡装用パラメータ測定装置において、一部領域は、被検者の顔を側面から撮像して得られた第1の画像上で被検者が装用する眼鏡フレームのリム部分を含む領域であり、該当領域は、被検者の顔を側面から撮像して得られた第2の画像上で被検者の眼球角膜部分を含まない領域であることを特徴とする。
本発明の第5の態様は、表示画面部および操作部を備え、眼鏡フレームを装用する被検者の眼鏡装用パラメータについて測定を行う際に用いられるコンピュータを、
被検者の眼鏡フレーム装用状態における顔画像である第1の画像と眼鏡フレーム非装用状態における顔画像である第2の画像とのそれぞれを関連付けた第3の画像を準備する画像処理手段と、
画像処理手段が準備した第3の画像を表示画面部に表示させる表示制御手段と、表示画面部が表示する第3の画像上で眼鏡装用パラメータの測定基準点の指定を操作部で行わせる操作制御手段と、指定された測定基準点のデータを用いて眼鏡装用パラメータを算出する計測演算手段と、として機能させることを特徴とする眼鏡装用パラメータ測定プログラムである。
本発明の第6の態様は、眼鏡フレームを装用した状態の被検者の顔画像を用いて被検者に関する眼鏡装用パラメータを測定する際に、測定に必要となる顔画像上の測定基準点を指定するための位置指定方法であって、被検者の眼鏡フレーム装用状態における顔画像である第1の画像と眼鏡フレーム非装用状態における顔画像である第2の画像とをそれぞれ取得しておき、測定基準点の指定にあたり、眼鏡フレーム装用状態における第1の画像と眼鏡フレーム非装用状態における第2の画像とを関連付けた第3の画像を準備して表示し、第3の画像上で眼鏡装用パラメータの測定基準点の指定を行うことを特徴とする位置指定方法である。
ここでは、以下のような項分けをして説明を行う。
1.本発明の概要
2.眼鏡装用パラメータの具体例
3.眼鏡装用パラメータ測定装置の構成例
4.眼鏡装用パラメータ測定方法の手順
4-1.手順の概要
4-2.特徴的な手順の詳細
4-3.その他の手順
5.本実施形態の効果
6.変形例等
6-1.合成画像の変形例
6-2.顔側面画像以外への適用
6-3.測定補助具の使用
先ず、本発明の概要について説明する。
本発明は、眼鏡装用パラメータについて測定を行う際に用いられる。さらに詳しくは、眼鏡フレームを装用した状態の被検者の顔を撮像して、その撮像結果である顔画像を画面上に表示し、その顔画像上にて測定の基準となる点(例えば、被検者の角膜頂点や眼鏡フレーム前枠等)を指定した上で、その測定基準点の位置に基づいて各種眼鏡装用パラメータを演算して求めることで、眼鏡装用パラメータについて測定を行う。
このような眼鏡装用パラメータの測定を、本発明では、装置本体(筐体)が可搬式に構成された眼鏡装用パラメータ測定装置を用いて行う。可搬式であれば、非可搬式の大掛かりな測定装置のような設置スペースを要することがなく、眼鏡店への導入を容易化できるからである。
可搬式の眼鏡装用パラメータ測定装置は、眼鏡装用パラメータの測定者(すなわち被検者に対する検者)が手で持ち運び可能なものであれば、その構成が特に限定されるものではないが、その一例として撮像機能、画像表示機能、操作機能および情報処理機能を備えたコンピュータである携帯型のタブレット端末装置を利用して構成することが考えられる。タブレット端末装置を利用して構成すれば、眼鏡装用パラメータの測定に必要十分な撮像機能、画像表示機能、操作機能および情報処理機能が得られ、しかも近年広く普及しつつあることを鑑みれば低コストで構成することも実現可能となり、眼鏡店への導入を促進する上で非常に好適であると言える。
この点につき、本願発明者は、鋭意検討を行った。そして、本願発明者は、眼鏡フレームを装用した状態の被検者の顔画像を表示しつつ、その眼鏡フレームを装用していない状態の被検者の顔画像についても表示して検者(操作者)が把握できるようにすれば、被検者の顔について視認困難な箇所が生じてしまうのを回避することができ、これによる操作性悪化を抑制できるのではないかと考えた。
このことを実現すべく、本願発明者は、さらに鋭意検討を重ねた。そして、本願発明者は、眼鏡フレーム装用状態の被検者の顔の撮像結果に加えて、眼鏡フレーム非装用状態の被検者の顔の撮像結果を用意しておき、これらの撮像結果を互いに関連付けて一つの表示画面内に表示することで、眼鏡フレームによる視認困難な箇所についても当該眼鏡フレームがない状態を容易に把握することが可能になるという、従来にはない全く新たな着想を得るに至った。
すなわち、本発明は、被検者の眼鏡フレーム装用状態における顔画像(第1の画像)と眼鏡フレーム非装用状態における顔画像(第2の画像)とをそれぞれ取得しておき、眼鏡装用パラメータの測定に必要となる測定基準点を指定にあたり、それぞれの顔画像を関連付けた(加工)画像(第3の画像)を生成して一つの表示画面内に表示し、その加工画像上で測定基準点の指定を行うことを特徴とする。
このような特徴を有することで、眼鏡装用パラメータの測定にあたり、被検者の顔画像上で測定基準点の位置指定を行う場合に、その測定基準点の位置指定を行うことを実現可能とするのである。
ここで、眼鏡装用パラメータ測定装置を用いて測定される眼鏡装用パラメータについて説明する。
図1は、眼鏡装用パラメータの具体例を示す説明図である。
フレーム角膜頂点間距離FVDは、図1(b)に示すように、被検者(眼鏡装用者)が遠方視したときの視軸を遠方視軸Aとした場合において、その遠方視軸A上における当該被検者の眼球Eの角膜の頂点から、その状態で被検者が装用する眼鏡フレームFへと水平方向に線を伸ばし、眼鏡フレームFの外周最上端にある上リムの幅の中央から、眼鏡フレームFの外周最下端にある下リムの幅の中央とを結んだ直線との交点までの距離が、角膜頂点フレーム間距離である。
また、眼鏡フレームFが縁なしの場合は、眼鏡フレームFに取り付けられたダミーレンズの上端と下端のコバの幅の中点とを結んだ直線との交点までの距離が、角膜頂点フレーム間距離である。
さらに、眼鏡フレームFがナイロールの場合は、リムバーの幅の中央、またはブローバーの幅の中央とダミーレンズの下端のコバの幅の中点とを結んだ直線との交点までの距離が、角膜頂点フレーム間距離である。
なお、眼鏡レンズLの処方度数等が確定すれば、フレーム角膜頂点間距離FVDの測定結果を基に、レンズ基材の屈折率、レンズ凸面カーブ形状、レンズ凹面カーブ形状、レンズ肉厚、フレーム前傾角、フレームのそり角、レンズの前傾角、アイポイント、ヤゲンの位置を計算パラメータとして幾何演算等を行うことで、当該処方度数等が反映された角膜頂点間距離CVDを一意に導き出すことが可能となる。
次に、眼鏡装用パラメータの測定を行う際に用いられる眼鏡装用パラメータ測定装置の構成例について説明する。
図2は、本発明の一実施形態における眼鏡装用パラメータ測定装置の構成例を示す説明図であり、(a)は外観斜視図、(b)は機能ブロック図を示している。
なお、タッチインタフェースによる操作部12aの操作は、図例のようにタッチペンを用いて行うことが考えられるが、操作者の指で直接行うようにしても構わない。また、操作部12aは、タッチインタフェースによるものではなく、タブレット端末1に接続されたキーボードやマウス等の情報入力装置を用いるようにしても構わない。
次に、上述した構成のタブレット端末1を使用して行う眼鏡装用パラメータ測定方法の手順について説明する。
ここで、先ず、眼鏡装用パラメータ測定方法の手順の概要について説明する。
図3は、本発明の一実施形態における眼鏡装用パラメータ測定方法の手順の一例を示すフローチャートである。
続いて、上述した各段階を経る眼鏡装用パラメータ測定方法における特徴的な手順について、具体例を挙げて詳細に説明する。
図4は、本発明の一実施形態における眼鏡装用パラメータ測定装置の撮像ファインダーで表示する内容の具体例を示す説明図であり、被検者の眼鏡フレーム装用状態における第1の画像を撮像する場合に必要となる表示内容を示す図である。図5は、同じく撮像ファインダーで表示する内容の具体例を示す説明図であり、被検者の顔を側面から撮像する際における表示内容を示す図である。
一方、第二基準線32は、表示画面部12の画角に対して常に固定的に表示される。したがって、タブレット端末1の装置筐体10の姿勢が変わると、これに伴って第二基準線32が延びる方向も変わることになる。
なお、第一基準線31と第二基準線32とは、それぞれを識別し得るように表示される。具体的には、それぞれの表示色を相違させることで、識別し得るようにすることが考えられる。
被検者の眼鏡フレーム装用状態における第1の画像の撮像が終了すると、タブレット端末1は、次いで、検者による所定操作に応じて、当該被検者の眼鏡フレーム非装用状態についての撮像モードとなる。
被検者の眼鏡フレーム装用状態の第1の画像の撮像処理(S102)が終了した後は、フレーム前傾角αの測定処理(S104)を開始することが可能となる。フレーム前傾角αを測定する場合に、タブレット端末1は、検者による所定操作に応じて、前傾角測定モードとなる。
ところで、測定段階においては、被検者の顔の撮像結果である顔画像を基に、眼鏡装用パラメータを演算して求める。そのため、例えばフレーム角膜頂点間距離FVDのような距離の大きさによって特定される眼鏡装用パラメータについては、これを演算して求めるのにあたり、顔画像上における距離の大きさと実空間内での実際の距離の大きさとを関連付けるキャリブレーション(較正)が必要となる。
第三基準線35は、表示画面部12における画面の上下方向中間点付近に固定的に表示される。なお、第三基準線35の表示は必須ではなく、当該表示を省略してもよい。
一方、第四基準線36a,36bは、第三基準線35を挟むようにそれぞれが表示される。また、第四基準線36a,36bは、第三基準線35との平行状態を維持したまま、それぞれが独立して画面内で移動させ得るようになっている。第四基準線36a,36bの画面内での移動は、検者による操作部12aでの操作内容に従いつつ行われる。
以上のような眼鏡装用パラメータ測定装置が完了すると、その後、タブレット端末1では、フレーム角膜頂点間距離FVDの測定処理(S106)が実行可能となる。フレーム角膜頂点間距離FVDを測定する場合に、タブレット端末1は、検者による所定操作に応じて、フレーム角膜頂点間距離測定モードとなる。
図7は、本発明の一実施形態における眼鏡装用パラメータ測定装置が行う画像合成処理の具体例を示す説明図である。
以上のような画像合成処理を行った後、タブレット端末1では、その画像合成処理で得られた一つの合成画像45を表示画面部12で表示した上で、検者にフレーム角膜頂点間距離FVDの測定に必要となる測定基準点の指定を行わせる。
検者がポインタ画像53,54をそれぞれの位置に移動させて、これによりフレーム角膜頂点間距離FVDを求めるための測定基準点を指定すると、計測演算手段15eは、角膜頂点に位置するポインタ画像53の中心を通る水平方向に延びる直線と、眼鏡フレームFのリムの上端および下端の各ポインタ画像54の中心を結ぶ直線との交点を求める。そして、計測演算手段15eは、その交点と角膜頂点に位置するポインタ画像53の中心との間の距離を、フレーム角膜頂点間距離FVDとして求める。
以上に、本実施形態において眼鏡装用パラメータを測定する際の特徴的な手順について説明したが、タブレット端末1は、上述した特徴的な手順以外のその他の手順について行うものであってもよい。その他の手順としては、撮像段階における被検者の顔上面の撮像処理や顔正面の撮像処理、測定段階におけるフレーム反り角βの測定処理、フィッティングポイント位置FPの測定処理、瞳孔間距離PDの測定処理等が挙げられる。なお、これらの各手順については、公知技術を利用して行えばよいため、ここではその詳細な説明を省略する。
本実施形態で説明したタブレット端末1、当該タブレット端末1の特徴的な機能を実現する眼鏡装用パラメータ測定プログラム、および、当該タブレット端末1を用いて行う位置指定方法によれば、以下のような効果が得られる。
したがって、本実施形態によれば、上述した画像合成処理を経ることで、その画像合成処理後の一つの合成画像上において、眼鏡フレームの画像部分を必要に応じて部分的に削除することが可能になる。このように、眼鏡フレームの画像部分を部分的に削除可能であれば、被検者が装用している眼鏡フレームの形状がどのようなものであっても、その眼鏡フレーム形状に起因して被検者の顔が視認困難になってしまうのを防ぐことができる。例えば、テンプル幅が大きい眼鏡フレームを被検者が装着している場合であっても、そのテンプル部分を削除することで、顔画像上において被検者の角膜頂点が眼鏡フレームのテンプルに隠れてしまうのを防止できる。
つまり、本実施形態によれば、眼鏡装用パラメータを求めるために必要となる測定基準点の指定にあたり、必要に応じて眼鏡フレームの画像部分を部分的に削除することで、指定すべき測定基準点の位置が不明確になってしまうのを回避でき、その結果として測定基準点の位置指定を簡便に行うことができるようになり、さらには指定後の測定基準点の位置について必要十分な位置精度を確保し得るようにもなる。
したがって、本実施形態によれば、測定基準点の指定にあたって必要となる部分だけを、確実に眼鏡フレーム非装用状態についての顔画像に置換することになる。つまり、測定基準点の指定にあたり不要となる眼鏡フレームの画像部分を確実に削除することができ、その結果として測定基準点の位置指定を簡便かつ高精度に行うことが実現可能となる。
以上に本発明の実施形態を説明したが、上述した開示内容は、本発明の例示的な実施形態を示すものである。すなわち、本発明の技術的範囲は、上述の例示的な実施形態に限定されるものではない。以下に、変形例等について説明する。
本実施形態では、眼鏡フレーム装用状態の第1の画像と眼鏡フレーム非装用状態の第2の画像との合成画像(第3の画像)として、一方の画像の一部領域を他方の画像の該当領域に嵌め込んだスーパーインポーズ合成画像を表示する場合を例に挙げたが、本発明はこれに限定されるものではなく、他の合成態様による合成画像を表示するようにしてもよい。他の合成態様による合成画像としては、例えば、透過性を相違させた状態で各画像を重ね合わせたようなものが挙げられる。
また、眼鏡フレーム装用状態の第1の画像と眼鏡フレーム非装用状態の第2の画像とは、それぞれが互いに関連付けられて表示されていれば、必ずしも合成された状態で表示されることを要さない。つまり、本発明は、眼鏡フレーム装用状態の第1の画像と眼鏡フレーム非装用状態の第2の画像との各画像を互いに関連付けた加工画像(第3の画像)を生成して表示し、その加工画像上で測定基準点の指定を行わせるものであってもよい。ここでいう「関連付け」とは、測定基準点の指定にあたり各画像の関連性を認識し得るようにすることをいう。したがって、各画像を互いに関連付けた加工画像には、本実施形態で説明した合成画像の他に、以下のようなものも含まれる。すなわち、加工画像としては、眼鏡フレーム装用状態の第1の画像と眼鏡フレーム非装用状態の第2の画像とのそれぞれを並べて表示しつつ、位置を合わせ、および/または、大きさを合わせ、それぞれの画像上の同一位置をポインタ画像が同期して移動するように加工したものが、その一例として挙げられる。このような例に限られず、測定基準点の指定にあたり必要となる箇所を眼鏡フレームの有無にかかわらず視認し易くするように、眼鏡フレーム装用状態の第1の画像と眼鏡フレーム非装用状態の第2の画像とを加工して表示するものであれば、本発明における「加工画像(すなわち第3の画像)」に該当することになる。例えば上記のようなフレーム装用状態とフレームなしの各々の画像を、角膜頂点と眼鏡のフロント部(眼鏡レンズを取り付ける部分)の間に位置する鉛直方向直線にて分割した上で、フレーム装用状態の画像であってフレームフロント部が含まれる分割画像と、フレームなしの画像であって角膜頂点を含む画像分割とを選択して並べることも本願の好適な実施の形態である。この場合、情報処理部15において、合成画像を新たに生成するというよりも、被検者の眼鏡フレーム装用状態における第1の画像と眼鏡フレーム非装用状態における第2の画像とをそれぞれ取得し、それぞれの画像を関連付けた第3の画像を準備している。
本実施形態では、主として、フレーム角膜頂点間距離FVDを測定するときの処理手順を例に挙げている。そのため、本実施形態では、被検者の顔側面についての画像を合成して合成画像とする場合について説明している。ただし、本発明はこれに限定されるものではなく、被検者の顔側面の他に、被検者の顔上面や顔正面等についても、本実施形態の場合と同様の画像合成処理を行うようにすることも考えられる。例えばサングラスを装用した状態で、サングラス上のアイポイント位置を特定しようとすると、サングラスの遮光作用により角膜位置を確認することは容易でないことがある。サングラス装用状態と、サングラスを装用していない画像を撮像し、少なくとも角膜頂点を含む画像と、サングラスのフレーム枠含む画像を合わせた合成画像を作成すればサングラス上のアイポイント位置を確認することが可能となる。
本実施形態では、実空間内での大きさと画像上での大きさとを関連付けるキャリブレーションを、眼鏡フレーム縦幅の測定処理(S105)を行ったうえで、その処理結果に基づいて行う場合を例に挙げている。ただし、キャリブレーションは、例えば、スケール等を用いて計測した眼鏡フレーム縦幅の値を検者がタブレット端末1に数値入力することで行うようにしてもよい。また、眼鏡フレーム縦幅を測定するのではなく、所定サイズの図形によって構成された測定基準スケールを指標として用い、その指標を被検者の顔画像と共に撮像することによって行うようにしてもよい。具体的には、撮像段階において、構成図形の大きさ(すなわち実空間内での大きさ)が既知である測定基準スケールが描かれた測定補助具を、被検者の顔と併せて撮像対象とする。そして、その撮像結果に含まれる測定基準スケールを構成するいずれかの図形部分を用いて、実空間内での大きさと顔側面合成画像上での大きさとを関連付けるキャリブレーションを行い、顔側面合成画像上でのスケール変換を行うようにすることが考えられる。なお、測定補助具については、公知技術を利用して実現したものであればよく、ここではその詳細な説明を省略する。
本実施形態では、撮像カメラ部11で得た画像データを使用したが、それ以外の画像データを使用しても構わない。例えば、タブレット端末1の撮像カメラ部11で撮像した画像データではなく、他の撮像機器により被験者を撮像して得られた画像データを使用しても構わない。タブレット端末1において撮像カメラ部11を設けるのはあくまで好ましい例である。
Claims (6)
- 眼鏡フレームを装用する被検者の眼鏡装用パラメータについて測定を行う際に用いられる眼鏡装用パラメータ測定装置であって、
前記被検者の眼鏡フレーム装用状態における顔画像である第1の画像と眼鏡フレーム非装用状態における顔画像である第2の画像とをそれぞれ取得し、前記第1の画像と前記第2の画像とを関連付けた第3の画像を準備する情報処理部と、
前記情報処理部が準備した前記第3の画像を表示する表示画面部と、
前記表示画面部が表示する前記第3の画像上で前記眼鏡装用パラメータの測定基準点の指定を行う操作部と、
指定された前記測定基準点のデータを用いて眼鏡装用パラメータを算出する演算部と、
を備えることを特徴とする眼鏡装用パラメータ測定装置。 - 前記第3の画像は、前記眼鏡フレーム装用状態における第1の画像と前記眼鏡フレーム非装用状態における第2の画像とを合成した少なくとも測定位置を含む合成画像である
ことを特徴とする請求項1記載の眼鏡装用パラメータ測定装置。 - 前記合成画像は、前記眼鏡フレーム装用状態における第1の画像の一部領域と、前記眼鏡フレーム非装用状態における第2の画像の該当領域との合成画像である
ことを特徴とする請求項2記載の眼鏡装用パラメータ測定装置。 - 前記一部領域は、前記被検者の顔を側面から撮像して得られた第1の画像上で前記 被検者が装用する眼鏡フレームのリム部分を含む領域であり、
前記該当領域は、前記被検者の顔を側面から撮像して得られた第2の画像上で前記被検者の眼球角膜部分を含まない領域である
ことを特徴とする請求項3記載の眼鏡装用パラメータ測定装置。 - 表示画面部および操作部を備え、眼鏡フレームを装用する被検者の眼鏡装用パラメータについて測定を行う際に用いられるコンピュータを、
前記被検者の眼鏡フレーム装用状態における顔画像である第1の画像と眼鏡フレーム非装用状態における顔画像である第2の画像とのそれぞれを関連付けた第3の画像を準備する画像処理手段と、
前記画像処理手段が準備した前記第3の画像を前記表示画面部に表示させる表示制御手段と、
前記表示画面部が表示する前記第3の画像上で前記眼鏡装用パラメータの測定基準点の指定を前記操作部で行わせる操作制御手段と、
指定された前記測定基準点のデータを用いて前記眼鏡装用パラメータを算出する計測演算手段、
として機能させることを特徴とする眼鏡装用パラメータ測定プログラム。 - 眼鏡フレームを装用した状態の被検者の顔画像を用いて前記被検者に関する眼鏡装用パラメータを測定する際に、前記測定に必要となる前記顔画像上の測定基準点を指定するための位置指定方法であって、
前記被検者の眼鏡フレーム装用状態における顔画像である第1の画像と眼鏡フレーム非装用状態における顔画像である第2の画像とをそれぞれ取得しておき、
前記測定基準点の指定にあたり、前記眼鏡フレーム装用状態における第1の画像と前記眼鏡フレーム非装用状態における第2の画像とを関連付けた第3の画像を準備して表示し、
前記第3の画像上で前記眼鏡装用パラメータの測定基準点の指定を行う
ことを特徴とする位置指定方法。
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