CN108567406A - A kind of analytical measurement system and method for human eye diopter - Google Patents
A kind of analytical measurement system and method for human eye diopter Download PDFInfo
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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
- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
- A61B3/032—Devices for presenting test symbols or characters, e.g. test chart projectors
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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
- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
- A61B3/0285—Phoropters
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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
- A61B3/112—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring interpupillary distance or diameter of pupils for measuring diameter of pupils
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- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/18—Eye characteristics, e.g. of the iris
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
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- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
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Abstract
The present invention relates to a kind of analytical measurement systems of human eye diopter, the camera is used to obtain the face-image of the consumer of different location, graphics process computing module calls myopic refractive degree calculating process corresponding with state, hyperopic refractive degree calculating process or simple astigmatism diopter calculating process according to the different conditions of calculated consumer's eyes, finally provides human eye diopter result.In the present invention, diopter can voluntarily measure result by user, can also result be measured by optician's shop, avoid the influence of the subjective factor of consumer when tradition is tried on inserted sheet during mirror, simplify the process for preparing glasses, make each consumer that can clearly grasp the variation of myopia degree, software provide diet, life etc. suggestion under carry out eyes health care.
Description
Priority declaration
The technical solution of the claim 1 of the present invention is required on April 28th, 2017 to China State Intellectual Property Office
Content in the specification specific embodiment application No. is 2017102931124 application for a patent for invention that Patent Office submits；
The technical solution of the claim 2 of the present invention is required on April 28th, 2017 to China State Intellectual Property Office
Patent Office submit application No. is the priority of claim 1 technical solution of 2017102931124 application for a patent for invention.
Technical field
The invention belongs to human eye diopter detection technique field, the analytical measurement system of especially a kind of human eye diopter and
Method.
Background technology
Eyes are that most of animal receives light and forms the organ of image in brain, be most important sense organ it
One, simple eye structure can detect the light and shade of ambient enviroment, and more complicated eye structure can provide vision, and human eye is exactly
A kind of more complicated structure, is broadly divided into the tissues such as wall of eyeball, intraocular chamber and content, nerve, blood vessel, and crystalline lens therein is used
In focusing, iris be used to control enter eyes light number.
Flexion occurs for the light that eyes make object reflection, and so that light is directly fallen on retina, is able to obtain clearly
Image, but the reasons such as excess eye-using, disease can cause eyes various problems occur, such as：Myopia, long sight, presbyopic, astigmatism etc. are asked
Topic, wherein myopia is to be only capable of seeing the object of short distance clearly, remote object seems very fuzzy, this is because image is focused
To the front of retina, the method for correction is that myope is allowed to wear concavees lens, the light after focusing can be made driven slightly rearwardly thereby in this way,
Just it falls on retina.Long sight is that the anteroposterior diameter of eyeball shortens, after the light focusing to retina that the object of short distance is sent out
Face seems just very fuzzy in this way, and only remote object can be seen clearly, wearable convex lens, so that light is rolled over slightly inwards and bends, side
Light is helped to fall on the retina.Presbyopic refers to the case where aged people gradually generates near-distance reading or operational difficulties, this is
A kind of phenomenon of function of human body aging, such as：See that tiny that the handwriting is blurred is unclear, it is necessary to which by books, newspaper is taken far can just see clearly
Writing above continues to increase with the age, is moved even if books and newspapers are remote as possible, it is also difficult to obtain clearly eyesight, at this time
Near-sighted ability can be improved by wearing convex lens.Astigmatism is a kind of not positive state of ophthalmic refractive, the reason of causing astigmatism
It is that cornea or plane of crystal curvature are inconsistent, such as American football shape, causes the refractive power of orthogonal two meridian different,
Form unintelligible or superimposed image, see it is remote see it is close unclear.Under normal circumstances, astigmatism degree is more stable, and generally not
Can with the age increase and increase, so be engaged in fine-limit work person or need for a long time read small characters person be contemplated that by glasses into
Row correction.
No matter which kind of above-mentioned problem is required to be corrected, and the mode of wearing spectacles is usually used, if not correcting meeting
It influences the normal life of people, work, the most importantly optometry in glasses process for preparation, using emmetropia state as standard,
The poly- scattered difference degree between eye subject and emmetropia is measured, common equipment is optometry unit, which occupies in clinical position
Critically important status, relative to the inefficiency and trivial operations of traditional retinoscopy method, optometry unit using it is infrared,
The technological means such as electronics, computer check the incident retrobulbar focus condition of light, have measuring speed fast, easy to use excellent
Point, but find in actual use, optometry unit still there are problems that：1. optometry unit is specialized hardware, need to engage profession
Optist, by its measure when gradually operated, complete myopic refractive degree measurement, general user is difficult specially to buy
Expensive optometry unit, and the professional training of optometry operation can not be obtained；2. the accuracy of optometry unit by it is many because
The influence of element, such as：Consumer's head eye cooperation is bad, watches eye attentively does not concentrate, consumer's excessively anxiety etc. can all cause it is larger
Error, so optometry unit prepared as glasses it is unique according to being improper；3. optometry unit is only capable of measuring myopic refractive degree
Substantially situation, provide reference to understanding consumer's dioptric degree, optist is finally or will be according to the subjective feeling of consumer
Inserted sheet is carried out to try on the suitable number of degrees of determination.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide it is easy to operate, without complicated optometry equipment, be not necessarily to
Professional knowledge can understand a kind of analytical measurement system of human eye diopter of glasses diopter state at any time, everywhere.
The technical solution adopted by the present invention is that：
A kind of analytical measurement system of human eye diopter, it is characterised in that：Including camera and graphics process computing module,
The camera is used to obtain the face-image of the consumer of different location, and graphics process computing module is according to calculated consumption
The different conditions of person's eyes call myopic refractive degree calculating process corresponding with state, hyperopic refractive degree calculating process or pure
Astigmatism diopter calculating process finally provides human eye diopter result.
It is a further object to provide a kind of measurement method of the analytical measurement system of human eye diopter, features
It is：Include the following steps：
(1) the terminal movement with camera and the from the near to the distant face far from consumer, the simple eye naked eye of consumer are made
The sighting target of terminal setting, when consumer just sees clearly sighting target, camera obtains consumer's near point face-image；
(2) diameter on the picture of iris is calculated near point face-image；
(3) according to the corresponding iris of near point face-image as upper diameter calculation goes out simple eye near point sighting distance；
(4) near point diopter is calculated according near point stadimeter, disappeared near point diopter and the judgement of the operation result of the amplitude of accommodation
The state of the person's of expense eyes；
When the sum of near point diopter and the amplitude of accommodation are less than zero, eyes are myopia, are calculated into myopic refractive degree
Journey；
When the sum of near point diopter and the amplitude of accommodation are more than zero, eyes are farsightedness, are calculated into hyperopic refractive degree
Journey；
When the sum of near point diopter and the amplitude of accommodation are zero, eyes are emmetropia, into simple astigmatism dioptometer
Calculation process.
Moreover, myopic refractive degree calculating process includes the following steps：
A. make the terminal movement with camera and from the distant to the near close to the face of consumer, the simple eye naked eye of consumer
The sighting target of terminal setting, when consumer just sees clearly sighting target, camera obtains consumer's far point face-image；
B. diameter on the picture of iris is calculated in far point face-image；
C. according to the corresponding iris of far point face-image as upper diameter calculation goes out simple eye far point sighting distance；
D. according to far point stadimeter calculate myopic refractive degree, myopic refractive degree=- (1/ far point sighting distance)；
E. the measurement of renaturation Myopia astigmatism diopter is carried out.
Moreover, the measurement of renaturation Myopia astigmatism diopter includes the following steps：
The sighting target for replacing display is astigmatism dial plate；
A. make the terminal movement with camera and from the distant to the near close to the face of consumer, the simple eye naked eye of consumer
The astigmatism dial plate of terminal setting, when the arbitrary straight line color in astigmatism dial plate starts to deepen, camera obtains consumer
Starting point face-image；
B. the terminal for carrying camera continues close to consumer's face, the astigmatism of the simple eye naked eye terminal setting of consumer
Dial plate, when the shade of all straight lines in astigmatism dial plate is consistent, camera obtains the terminal face-image of consumer；
C. diameter on the picture of iris in zequin face-image；
D. calculate terminal face-image in iris picture on diameter；
E. according to diameter calculation starting point sighting distance on the picture of the corresponding iris of starting point face-image；
F. according to diameter calculation terminal sighting distance on the picture of the corresponding iris of terminal face-image；
Renaturation Myopia astigmatism diopter is the difference of starting point diopter and terminal diopter.
Moreover, hyperopic refractive degree calculating process includes the following steps：
A. make the terminal movement with camera and from the distant to the near close to the face of consumer, the simple eye naked eye of consumer
The sighting target of terminal setting, when reach suitably apart from when, camera obtains consumer operating position face-image；
B. diameter on the picture of iris is calculated in the face-image of operating position；
C. according to the corresponding iris of operating position face-image as upper diameter calculation goes out simple eye operating position sighting distance；
D. hyperopic refractive degree, hyperopic refractive degree=(1/ operating position are calculated according to operating position sighting distance and near point stadimeter
Sighting distance)-(1/ near point sighting distance)；
E. the measurement of renaturation long sight astigmatism diopter is carried out.
Moreover, the measurement of renaturation long sight astigmatism diopter includes the following steps：
The sighting target for replacing display is astigmatism dial plate；
A. it carries the terminal movement of camera and the face far from consumer, the simple eye naked eye of consumer is whole from the near to the distant
The astigmatism dial plate for holding setting, when the arbitrary straight line color in astigmatism dial plate starts to deepen, camera obtains consumer and rises
Point face-image；
B. the terminal for carrying camera continues far from consumer's face, the astigmatism of the simple eye naked eye terminal setting of consumer
Dial plate, when the shade of all straight lines in astigmatism dial plate is consistent, camera obtains consumer's terminal face-image；
C. diameter on the picture of iris in zequin face-image；
D. calculate terminal face-image in iris picture on diameter；
E. according to diameter calculation starting point sighting distance on the picture of the corresponding iris of starting point face-image；
F. according to diameter calculation terminal sighting distance on the picture of the corresponding iris of terminal face-image；
Renaturation long sight astigmatism diopter is the difference of starting point diopter and terminal diopter..
Moreover, simple astigmatism diopter calculating process includes the following steps：
A. it carries the terminal movement of camera and the face far from consumer, the simple eye naked eye of consumer is whole from the near to the distant
Hold the astigmatism dial plate of setting：
If all straight line shades in astigmatism dial plate when mobile unanimously if exit active procedure and judge emmetropia
Without astigmatism；
If arbitrary straight line color when mobile in astigmatism dial plate is from light to dark, camera obtains consumer's starting point face
Portion's image；
B. the terminal for carrying camera continues far from consumer's face, the astigmatism of the simple eye naked eye terminal setting of consumer
Dial plate, when the shade of all straight lines in astigmatism dial plate is consistent, camera obtains consumer's terminal face-image；
C. diameter on the picture of iris in zequin face-image；
D. calculate terminal face-image in iris picture on diameter；
E. according to diameter calculation starting point sighting distance on the picture of the corresponding iris of starting point face-image；
F. according to diameter calculation terminal sighting distance on the picture of the corresponding iris of terminal face-image；
G. it is simple myopic astigmatism, closely if starting point sighting distance is less than near point sighting distance and terminal sighting distance is equal near point sighting distance
Point sighting distance is terminal sighting distance, and simple myopic astigmatism diopter is the difference of starting point diopter and near point diopter；
It is simple hyperopic astigmatism, near point if starting point sighting distance is equal near point sighting distance and terminal sighting distance is more than near point sighting distance
Sighting distance is starting point sighting distance, and simple hyperopic astigmatism diopter is the difference of near point diopter and terminal diopter.
Moreover, the sighting distance be consumer list eye iris center to screen vertical range, by curve look into value method or
Computing method of formula obtains.
Moreover,
Establishing the process of curve is：
The iris of pre-production consumer face-image as the sample table between upper diameter and the sighting distance actually measured,
Engineer's scale is found out by the ratio as upper diameter and consumer's face-image width；
(2) the coordinate system that the sighting distance actually measured is abscissa, engineer's scale is ordinate is established；
(3) curve is drawn in coordinate system according to sample table；
Looking into the process of value is：
(1) the numerical value of engineer's scale is obtained with the calculated width as upper diameter divided by the face image of people；
(2) the numerical value of the corresponding sighting distance of abscissa is searched according to the numerical value of engineer's scale on curve.
Moreover, the computing method of formula uses following formula：
Wherein, Y is distance, and K values are the pixel value that 1.5 ± 0.2, W is face-image width, and D is straight on the picture of iris
Diameter.
The advantages and positive effects of the present invention are：
1. in this system, consumer only needs the terminals such as mobile phone, a tablet computer with front camera, by certain
Operating procedure complete the acquisition of image, remaining calculating section completed by software, finally shows diopter on a display screen
Status information, consumer do not need to buy expensive optometry equipment, can be whenever and wherever possible without the optometry training by profession
Solve the state of the diopter of itself.
2. in this system, consumer can be carried out diopter in any environment such as work, life, shopping, queuing
It measures, as long as camera can normally obtain face-image and calculate pupil reflective spot, so that it may to obtain accurate dioptric
Degree, and measure it is easy, efficient, when changing tradition with mirror the most of the time spend in the situation in inserted sheet adjustment.
3. in this system, consumer can in different times, different places carry out the measurement of myopic refractive degree, avoid
Tradition is with during mirror, and consumer can only be in the error that optician's shop carries out single optometry and generate, and consumer can be at eyes
It is taken multiple measurements when different fatigue state, statistics calculating is carried out by software, obtains the average value of diopter, which can
As the foundation with mirror.
4. in the present invention, diopter can be voluntarily measured by user as a result, can also be measured by optician's shop as a result, avoiding
The influence of the subjective factor of consumer when tradition is tried on inserted sheet during mirror simplifies the process for preparing glasses, makes every
A consumer can clearly grasp the variation of myopia degree, software provide diet, life etc. suggestion under into
The health care of row eyes.
Description of the drawings
Fig. 1 (a), (b) are sighting distance and the near point face of the far point face-image of myopia measurement process in the present invention respectively
The test schematic of the sighting distance of portion's image；
Fig. 2 (a), (b) are the sighting distance of the operating position face-image of farsightedness measurement process in the present invention respectively and close
The test schematic of the sighting distance of point face-image；
Fig. 3 (a) is the test schematic of the starting point sighting distance and terminal sighting distance of compound myopic astigmatism；
Fig. 3 (b) is the test schematic of the starting point sighting distance and terminal sighting distance of compound hyperopic astigmatism；
Fig. 3 (c) is the test schematic of the starting point sighting distance and terminal sighting distance of simple myopic astigmatism；
Fig. 3 (d) is the test schematic of the starting point sighting distance and terminal sighting distance of simple hyperopic astigmatism；
Fig. 4 is the sighting distance of the multiple random sites obtained in advance, as upper diameter, the sample table of engineer's scale；
Fig. 5 is the curve of the sighting distance and engineer's scale relationship drawn according to sample table；
Fig. 6 be the sighting distance drawn according to sample table and iris as upper diameter Relationship curve；
Fig. 7 is the schematic diagram that myopia measures sighting target；
Fig. 8 is the schematic diagram that long sight measures sighting target；
Fig. 9 is the schematic diagram of astigmatism dial plate.
Specific implementation mode
With reference to embodiment, the present invention is further described, and following embodiments are illustrative, are not restrictive,
Protection scope of the present invention cannot be limited with following embodiments.
A kind of analytical measurement system of human eye diopter, as shown in Fig. 1~8, innovation of the invention is：Including camera
With graphics process computing module, the camera is used to obtain the face-image of the consumer of different location, and graphics process calculates
Module calls myopic refractive degree calculating process corresponding with state, long sight to bend according to the different conditions of calculated consumer's eyes
Luminosity calculating process or simple astigmatism diopter calculating process, finally provide human eye diopter result.
The measurement method of the analytical measurement system of above-mentioned human eye diopter includes the following steps：
(1) the terminal movement with camera and the from the near to the distant face far from consumer, the simple eye naked eye of consumer are made
The sighting target of terminal setting, when consumer just sees clearly sighting target, camera obtains consumer's near point face-image；
(2) diameter on the picture of iris is calculated near point face-image；
(3) according to the corresponding iris of near point face-image as upper diameter calculation the goes out simple eye near point sighting distance (survey of near point sighting distance
Amount principle is shown in Fig. 1 (b) and Fig. 2 (b))；
According near point stadimeter calculate near point diopter, near point diopter=- (1/ near point sighting distance), near point diopter
The state of consumer's eyes is judged with the operation result of the amplitude of accommodation；
When the sum of near point diopter and the amplitude of accommodation are less than zero, eyes are myopia, are calculated into myopic refractive degree
Journey；
When the sum of near point diopter and the amplitude of accommodation are more than zero, eyes are farsightedness, are calculated into hyperopic refractive degree
Journey；
When the sum of near point diopter and the amplitude of accommodation are zero, eyes are emmetropia, into simple astigmatism dioptometer
Calculation process.
Above-mentioned the case where being judged as myopia is a kind of comprehensive condition, may include simple myopia, presbyopic myopia, astigmatism
Property myopia or astigmatism presbyopic myopia.Negative diopter is only obtained without type classification in myopic refractive degree calculating process, that is, is existed
The correction number of degrees that this problem ametropia to presbyopic is contained in myopic refractive degree no longer need to individually calculate or measure presbyopic
The number of degrees.
Above-mentioned the case where being judged as farsightedness is also a kind of comprehensive condition, may include simple hypermetropia, presbyopic, presbyopic is remote
Depending on, astigmatism presbyopic, astigmatism long sight or astigmatism presbyopic long sight.In hyperopic refractive degree calculating process only without type classification
It obtains positive diopter, i.e., contains the correction number of degrees of this problem ametropia to presbyopic in myopic refractive degree, no longer need to list
Solely calculate or measure the number of degrees of presbyopic.
Include rectifying for presbyopic in the result of myopic refractive degree calculating process and the result of hyperopic refractive degree calculating process
The positive number of degrees obtain the correction number of degrees of myopia plus presbyopic without optist using multiple steps compared with prior art, without
Optist empirically directly carries out the adjustment of myopia degree, and result of calculation is more accurate, step is simpler.
Above-mentioned myopic refractive degree tacheometrical survey principle is shown in Fig. 1 (a, b), and calculating process includes the following steps：
A. make the terminal movement with camera and from the distant to the near close to the face of consumer, the simple eye naked eye of consumer
The sighting target of terminal setting, when consumer just sees clearly sighting target, camera obtains consumer's far point face-image；
B. diameter on the picture of iris is calculated in far point face-image；
C. according to the corresponding iris of far point face-image as upper diameter calculation goes out simple eye far point sighting distance；
D. according to far point stadimeter calculate myopic refractive degree, myopic refractive degree=- (1/ far point sighting distance).
Above-mentioned hyperopic refractive degree measuring principle is shown in that Fig. 2 (a, b) calculating process includes the following steps：
A. make the terminal movement with camera and from the distant to the near close to the face of consumer, the simple eye naked eye of consumer
The sighting target of terminal setting, when reach suitably apart from when, camera obtains consumer operating position face-image；
B. diameter on the picture of iris is calculated in the face-image of operating position；
C. according to the corresponding iris of operating position face-image as upper diameter calculation goes out simple eye operating position sighting distance, work
Make position sighting distance and is less than near point sighting distance；
D. hyperopic refractive degree, hyperopic refractive degree=(1/ operating position are calculated according to operating position sighting distance and near point stadimeter
Sighting distance)-(sighting distance of 1/ near point).(sighting distance of 1/ operating position) is the numerical value that operating position diopter takes absolute value, and (1/ is close
The sighting distance of point) it is what near point diopter took absolute value, the difference that the two takes absolute value respectively is hyperopic refractive degree.
After determining myopia and completing the calculating of myopic refractive degree, continue the survey of renaturation Myopia astigmatism diopter
Amount, such as the principle of Fig. 3 (a), measurement includes the following steps：
The sighting target for replacing display is astigmatism dial plate；
A. make the terminal movement with camera and from the distant to the near close to the face of consumer, the simple eye naked eye of consumer
The astigmatism dial plate of terminal setting, when the arbitrary straight line color in astigmatism dial plate starts to deepen, camera obtains consumer
Starting point face-image；
If all straight line shades in astigmatism dial plate in moving process unanimously if judge this it is simple eye for myopia and
Without astigmatism, and exit measurement process.
B. the terminal for carrying camera continues close to consumer's face, the astigmatism of the simple eye naked eye terminal setting of consumer
Dial plate, when the shade of all straight lines in astigmatism dial plate is consistent, camera obtains the terminal face-image of consumer；
C. diameter on the picture of iris in zequin face-image；
D. calculate terminal face-image in iris picture on diameter；
E. according to diameter calculation starting point sighting distance on the picture of the corresponding iris of starting point face-image；
F. according to diameter calculation terminal sighting distance on the picture of the corresponding iris of terminal face-image；
Renaturation Myopia astigmatism diopter=starting point diopter-terminal diopter, starting point diopter=- (1/ starting point regards
Away from), terminal diopter=- (1/ terminal sighting distance).
After determining farsightedness and completing the calculating of hyperopic refractive degree, continue the survey of renaturation long sight astigmatism diopter
Amount, such as the principle of Fig. 3 (b), measurement includes the following steps：
The sighting target for replacing display is astigmatism dial plate；
A. it carries the terminal movement of camera and the face far from consumer, the simple eye naked eye of consumer is whole from the near to the distant
The astigmatism dial plate for holding setting, when the arbitrary straight line color in astigmatism dial plate starts to deepen, camera obtains consumer and rises
Point face-image；
If all straight line shades in astigmatism dial plate in moving process unanimously if judge this it is simple eye for farsightedness and
Without astigmatism, and exit measurement process.
B. the terminal for carrying camera continues far from consumer's face, the astigmatism of the simple eye naked eye terminal setting of consumer
Dial plate, when the shade of all straight lines in astigmatism dial plate is consistent, camera obtains consumer's terminal face-image；
C. diameter on the picture of iris in zequin face-image；
D. calculate terminal face-image in iris picture on diameter；
E. according to diameter calculation starting point sighting distance on the picture of the corresponding iris of starting point face-image；
F. according to diameter calculation terminal sighting distance on the picture of the corresponding iris of terminal face-image；
Renaturation long sight astigmatism diopter=starting point diopter-terminal diopter, starting point diopter=- (1/ starting point regards
Away from), terminal diopter=- (1/ terminal sighting distance).
After determining emmetropia, continue the measurement of simple astigmatism diopter, such as the principle of Fig. 3 (c, d), measures packet
Include following steps：
A. it carries the terminal movement of camera and the face far from consumer, the simple eye naked eye of consumer is whole from the near to the distant
Hold the astigmatism dial plate of setting：
If all straight line shades in astigmatism dial plate when mobile unanimously if exit active procedure and judge emmetropia
Without astigmatism；
If arbitrary straight line color when mobile in astigmatism dial plate is from light to dark, camera obtains consumer's starting point face
Portion's image；
B. the terminal for carrying camera continues far from consumer's face, the astigmatism of the simple eye naked eye terminal setting of consumer
Dial plate, when the shade of all straight lines in astigmatism dial plate is consistent, camera obtains consumer's terminal face-image；
C. diameter on the picture of iris in zequin face-image；
D. calculate terminal face-image in iris picture on diameter；
E. according to diameter calculation starting point sighting distance on the picture of the corresponding iris of starting point face-image；
F. according to diameter calculation terminal sighting distance on the picture of the corresponding iris of terminal face-image；
G. it is simple myopic astigmatism, closely if starting point sighting distance is less than near point sighting distance and terminal sighting distance is equal near point sighting distance
Point sighting distance is terminal sighting distance, simple myopic astigmatism diopter=starting point diopter-near point diopter；
It is simple hyperopic astigmatism, near point if starting point sighting distance is equal near point sighting distance and terminal sighting distance is more than near point sighting distance
Sighting distance is starting point sighting distance, simple hyperopic astigmatism diopter=near point diopter-terminal diopter).
It is simple eye to refer in the above process, only have one eye to open when measuring every time, in addition one eye is blocked, such as left
Eye measures, and blocks right eye etc., but two eyes keep opening in measurement process state, to be measured simple eye not wear eye
The harness that the influences such as mirror, U.S. pupil measure.
It is (including multiple for long sight (including compound hyperopic astigmatism and simple hyperopic astigmatism) astigmatism, Myopia in this method
Property myopic astigmatism and simple myopic astigmatism) astigmatism is positive value, it also needs to detect astigmatic eyes by other methods in mirror
Axis of astigmatism, method are easier to, and are no longer illustrated herein.This sentence should embody in all astigmatism instructions books.
Terminal can be smart mobile phone, tablet computer, it might even be possible to be common camera, smart mobile phone, tablet computer will
For screen towards the face of consumer, the sighting target of screen display can be in a figure, a symbol or standard visual acuity chart
English alphabet E etc., astigmatism dial plate is as shown in figure 8, be a disk radially arranged by straight line.Consumer can click screen
Button, quick camera button on curtain carry out the acquisition of face-image.Common camera can connect computer, be pasted on camera
One cardboard, draw thereon, be pasted with figure, symbol or letter e etc., the face-image that camera obtains is collected computer
In, the effect of sighting target can also be realized in this way.
Above-mentioned sighting target is preferably the English alphabet E in standard visual acuity chart, altogether there are three, distributing position as shown in fig. 7, and
Should be as far as possible close to the position of camera, the drafting specification of E is shown in《Standard logarithmic visual acuity chart (GB-11533-2011)》3.1
Section.
In addition, in simple eye measurement, the simple eye sighting target that face substantially on terminal screen or cardboard has certain water certainly
Flat, vertical offset will not influence measurement result, and the extraneous light intensity in measuring environment will reach 300lux, screen intensity
Reach 200 (cd/m2), otherwise there can be a little influence on result.(see《Standard logarithmic visual acuity chart (GB-11533-2011)》5.3
Section).
Suitable distance during hyperopic refractive degree measures is that consumer thinks the distance for reaching reading or near work, is read
It reads or the distance of near work refers to：Consumer can see clear sighting target at this position, and eyes are relatively light, do not have
Excessive adjusting or eyes keeps the distance of comfort conditions in viewing.
Terminal movement can be realized by different modes, including：By consumer's handheld terminal carry out mobile mode, by
Other people handheld terminals carry out mobile mode or mobile mode is carried out by mobile device clamping terminal in addition terminal is fixed and
The mode of consumer's automatic moving is also possible, any one mode in these four modes may be implemented from the distant to the near or
Effect from the near to the distant, certainly, movement more stable, more at the uniform velocity are more advantageous to the accuracy and agility of measurement.
The empirical equation at the age and amplitude of accommodation relationship that Hofstetter (Hough Si Dite) is proposed：The amplitude of accommodation=
15-0.25 × the age.
Since human iris will stablize after being born 18 months in form, and interpersonal actual iris diameter
Margin of tolerance very little (± 0.5mm), so the sighting distance found out based on iris diameter is suitable for almost all of year with diopter
Age section crowd.So this method has universal applicability.
Above-mentioned iris includes the following steps as the processing procedure of upper diameter：
(1) color space conversion processing is carried out to face-image, obtain gray level image；Color space conversion will be for that will obtain
Dot cotton image and near point face-image handled, be converted into gray level image, such as：Use the face in Opencv
Color space transformation function void cvCvtColor (const CvArr*src, CvArr*dst, int code), may be implemented RGB
Color can also be converted to gray level image to HSV, the conversion of the color spaces such as HSI.
Parameter declaration：
The 8- bit single channel images of src inputs；
The image and input picture size of dst outputs are identical as data type；
code：The pattern of color space conversion, the code realize different types of color space conversion.
(2) histogram equalization processing is carried out to the result of step (1)；Histogram equalization is then by using cumulative function pair
Gray value is adjusted to realize the enhancing of contrast, such as：Use the histogram equalization function void in Opencv
cvEqualizeHist(const CvArr*src,CvArr*dst)。
Parameter declaration：
The 8- bit single channel images of src inputs；
The image and input picture size of dst outputs are identical as data type.
(3) the grader that human eye area is carried out to the result of step (2) positions；It is fixed using trained eye classification device
Human eye area is arrived in position, obtains the area image of single eyes.Such as：Use the grader applied to eyes in Opencv
" haarcascade_mcs_eyepair_big.Xml ", " haarcascade_mcs_eyepair_small.xml ",
" haarcascade_mcs_lefteye.xml ", " haarcascade_mcs_righteye.xml ".
Eyes call library 1 and library 2, single eye images to call library 3 and library 4, instantiation grader class CascadeClassifier
The void load (string filename) under CascadeClassifier are called afterwards.
DetectMultiScale function parameter explanations：
The rectangle that objects-detection obtains；
If rejectLevels-does not meet the rectangle of feature, the strong classifier number met in cascade classifier is returned；
The distance that levelWeights-sliding window moves every time.It must be the integral multiple of block movement；
ScaleFactor-image scale factor；
MinNeighbors-expression constitutes the minimum number of the adjacent rectangle of detection target；
Flags-threshold value, i.e. correction coefficient；
MinObjectSize and maxObjectSize-minimum and maximum detection window size, minSize and maxSize
Range for the target area limited.
Load function parameter explanations：
string filename:The path in the libraries such as haarcascade_mcs_eyepair_big.Xml.
To step (3) in single eyes area image carry out binary conversion treatment；By the gray scale of the pixel on image
Value is set as 0 or 255, that is, whole image is showed and significantly there was only black and white visual effect, marks iris
General profile.Such as：Pair it is operated using the cvThreshold function pair single channel array application fixed thresholds in Opencv, i.e.,
Gray level image carries out threshold operation and obtains bianry image, or removes noise, such as filters the figure of very little or very big pixel value
Picture point.
The method for taking threshold value to image that this function is supported is determined by threshold_type.
void cvThreshold(const CvArr*src,CvArr*dst,double threshold,double
max_value,int threshold_type)
Parameter declaration：
src：Single channel image；
dst：Export array, it is necessary to, single channel image consistent with the type of src；
threshold：Threshold value；
max_value：Use the maximum value of CV_THRESH_BINARY and CV_THRESH_BINARY_INV；
threshold_type：Threshold type.
(5) the area image of the single eyes to step (4) carries out hough-circle transform processing, obtains iris center and iris
As upper diameter.Best circle is matched in eye areas, diameter of a circle is exactly diameter on iris picture, and the center of circle is iris center.
Such as：Using the cvHoughCircles functions in Opencv,
CvSeq*cvHoughCircles(CvArr*image,void*circle_storage,int method,
double dp,double min_dist,double param1,double param2,int min_radius,int max_
radius)
Parameter declaration：
image:8bit (gray scale) image is inputted, content can be changed by function；
circle_storage:The circle storage silo detected can be memory storage storehouse；
method:Hough transform mode；
dp:Find the accumulative resolution ratio in the circular arc center of circle；
min_dist:The parameter is the minimum range between two different circles that algorithm can obviously be distinguished；
param1:For the edge threshold values upper limit of Canny, lower limit is set to the half of the upper limit；
param2:The threshold values of accumulator；
min_radius:Minimum radius of circle；
max_radius:Maximum radius of circle.
The full name of OpenCV is:Open Source Computer Vision Library, OpenCV are one and are based on
The cross-platform computer vision library of (increasing income) distribution, may operate in Linux, Windows and Mac OS operating systems, has
Lightweight and efficient advantage, are made of a series of C functions and a small amount of C++ class, at the same provide Python, Ruby,
The interface of the language such as MATLAB realizes many general-purpose algorithms in terms of image procossing and computer vision.Certainly, in addition to
Other than OpenCV, similar function with the same function, library, kit etc. can also be used to realize function.
Sighting distance be consumer list eye iris center to the vertical range of sighting target, value method or formula can be looked by curve
Calculating method obtains.Either curve looks into value method or computing method of formula, and the sample table of Fig. 4 is the numerical value of random measurement, that is, is regarded
May be the sighting distance of random length between human eye and screen away from Y.
Curve looks into value method：
Shoot in advance it is each apart from lower face image, calculate diameter on the picture of iris, then use laser, the rangings such as infrared
Equipment carries out field survey, obtains each as the corresponding sighting distance of upper diameter, sees the sample table in Fig. 4, the sighting distance Y in table by 10~
55 centimetres, it is corresponding as upper diameter D be 291~52, this is unified for 1944* as upper a diameter of pixel value, the pixel of face-image
2592, the former is width W, and the latter is height H, engineer's scale R=D/W.
If sample is enough, the drafting of curve can be carried out according to Y, R in table, the result obtained is shown in Fig. 5, abscissa
For sighting distance Y, ordinate is engineer's scale R.
Computing method of formula is：
Using the sample table of Fig. 4 as data source, the curve of drafting is shown in that Fig. 6, abscissa are sighting distance Y, and ordinate is as upper diameter
D carries out formula fitting according to the curve of Y and D, obtains
Y is sighting distance, and K values are the pixel value that 1.5 ± 0.2, W is face-image width, and D is diameter on the picture of iris.
In test process, sighting distance size verification is carried out by multiple external equipments such as infrared, laser, ultrasonic waves, error is very
It is small, substantially 1~2%, it is seen then that the calculated sighting distance of the present invention is very accurate, is bent despite the presence of error, but for subsequent
When luminosity calculates, it can be ignored completely.
Embodiment 1
Certain consumer 37 years old, 173 centimetres of height, male are under the conditions of outdoor natural light, use vivo X9.
1. eye state determines
Be display sighting target E at position of the mobile phone screen close to camera, block left eye, consumer hold mobile phone by close to
The nearby distally cell phone of face generally remains mobile phone at the uniform velocity in moving process, and the sight of right eye observation is substantially and screen
Vertically.
When consumer has just seen clear sighting target E, presses camera button and obtain near point face-image, consumer clicks storage
Key.
The pixel of near point face-image is 3874*5163, and a diameter of 232 on the picture of calculated iris, engineer's scale is
232/3874=0.06 is looked into according to Fig. 5 curves and is worth to Y=25 centimetres of near point sighting distance, show that near point diopter is -4D；It adjusts
Amplitude=15-0.25*37=5.75D.
Near point diopter+the amplitude of accommodation=1.75D>0, therefore show that this consumer's right eye is farsightedness.
2. hyperopic refractive degree measures
At this time consumer according to prompt according to hyperopic refractive degree measuring principle cell phone, when positioned at suitably apart from when,
The determining order of voice input, mobile phone obtain the operating position face-image of the position automatically, preserve image and are uploaded to app clothes
It is engaged in device.
The pixel of operating position face-image is 3874*5163, a diameter of 298 pixel on the picture of iris, according to formula meter
Calculation obtains Y=19.5 centimetres of sighting distance, substitutes into formula evaluation work position diopter=- 5.25D
Therefore obtain hyperopic refractive degree=5.25D-4.0D=+1.25D.
3. renaturation long sight astigmatism diopter measurement
Mobile phone claps to obtain starting point far from consumer's face when straight line color starts to deepen in astigmatism disk from the near to the distant
Face-image；Continue far from face when all straight line colors are equally deep in astigmatism disk, claps to obtain terminal face-image；
Starting point face-image as iris a diameter of 189 on the picture of upper iris a diameter of 255 and terminal face-image；
The pixel of astigmatism initial point face-image is 3874*5163, and according to equation, K takes 1.5, calculates astigmatism initial point sighting distance
It is 22.8 centimetres.
The pixel of astigmatism terminal face-image is 3874*5163, and according to equation, K takes 1.5, must calculate astigmatism terminal and regard
Away from for 30.7cm.
Therefore it obtains：
Renaturation long sight astigmatism diopter=astigmatism starting point diopter-astigmatism terminal diopter=1.13D ≈ 1.25D
The result of calculation of the opticians degree number provided with optist by the result of calculation of this method, the present embodiment is the consumption
The suitable number of degrees of person's current state are more suitable for consumer than optist by equipment and the empirically determined number of degrees.Same process
The diopter for measuring another eyes, obtains the suitable number of degrees.
Embodiment 2
Certain consumer 28 years old, 184 centimetres of height, male, respectively (the fine day morning), outdoor shade in the illumination of classroom fluorescent tube
(fine day afternoon) etc. many places carry out right eye diopter in the balcony natural illumination environment on (fine day noon) in environment, family daytime
It measures, measurement data, that is, result of calculation is shown in Table 1, wherein the mode moved using handheld terminal at outdoor, uses him indoors
The mode of human hand held terminal and consumer's automatic moving, outdoor application mobile phone, interior use tablet computer.Other conditions and implementation
Example 1 is identical.
1. eye state determines
The iris of certain near point face-image as upper diameter pixel value be 162.
The pixel that near point measures face-image is 960*1280, engineer's scale 162/960=0.169, according to Fig. 5 marches
Line, which is looked into, is worth to Y=8.3 centimetres of near point sighting distance, show that near point diopter is -12D；The amplitude of accommodation=15-0.25*28=8D.
Adjust the diopter+amplitude of accommodation=- 4D<0, therefore show that this consumer's right eye is myopia.
2. myopic refractive degree measures
It is as follows repeatedly to measure far point data：
Table 1：The data repeatedly measured
Calculate the average value of above-mentioned myopic refractive degree：
Simple arithmetic mean
Weighted mean method：
Geometric average method：
Therefore show that its myopic refractive degree is -4.5D.
3. renaturation Myopia astigmatism diopter measurement
Astigmatism starting point relevant parameter is shown in Table 2：
Table 2：Starting point relevant parameter
Astigmatism terminal relevant parameter part table 3：
| Serial number | As upper diameter | Terminal face-image | Terminal sighting distance (unit cm, be calculated by formula) |
| 1 | 49 | 960*1280 | 29.4 |
| 2 | 23 | 480*960 | 31.3 |
| 3 | 101 | 1944*2592 | 28.9 |
| 4 | 94 | 1920*2560 | 30.6 |
| 5 | 50 | 960*1280 | 28.8 |
Table 2：Terminal relevant parameter
Renaturation Myopia astigmatism diopter is shown in Table 3：
Table 3：Renaturation Myopia astigmatism diopter
Calculate the average value of above-mentioned astigmatism diopter：
Simple arithmetic mean
Weighted mean method：
Geometric average method：
Truncation average method：
Remove one highest 2.5 and minimum 1.75
In the prescription that rafractive provides, the mean of cylindrical diopter of right eye is 2.5D.When preparing glasses, optist, which provides, to disappear
The glasses right eye mean of cylindrical diopter of the person's of expense subjective observation environment is 2.0D.
By the result of calculation of this method compared with the opticians degree number that optist provides, the result of calculation of the present embodiment is should
The suitable number of degrees of consumer's current state.The diopter of same process measurement another eyes, obtains the suitable number of degrees.
Embodiment 3
Certain consumer 18 years old, 165 centimetres of height, women are in the lighting environment of normal light of supermarket, use mobile phone
It for Huawei mate9, stands below fluorescent tube, blocks right eye, hand-held mobile phone carries out the diopter measurement of left eye from the distant to the near, is moved through
Mobile phone is generally remained in journey at the uniform velocity, the sight of left eye observation is substantially and screen vertical.
1. eye state determines
Mobile phone screen shows sighting target E at the position of camera, consumer's cell phone from the distant to the near, when consumer is rigid
When just having seen clear sighting target E, presses camera button and obtain near point face-image, consumer clicks storage key.
The pixel that near point measures face-image is 2448*3264, as a diameter of 386 pixel of upper iris.According to equation meter
Calculation obtains Y=9.5 centimetres of near point sighting distance, show that near point diopter is -10.5D；The amplitude of accommodation=15-0.25*18=10.5D.
It is obtained according to Hofstetter (Hough Si Dite) ages proposed and the empirical equation of amplitude of accommodation relationship：
Near point diopter+the amplitude of accommodation=0；This artificial emmetropia is judged, into simple astigmatism diopter measurement process.
2. simple astigmatism diopter measurement
Mobile phone slowly claps to obtain starting point face far from face when straight line color starts to deepen in astigmatism disk from the near to the distant
Portion's image；Continue slowly to clap to obtain terminal face-image when all straight line colors are equally deep in astigmatism disk far from face；
Starting point face-image as iris a diameter of 75 on the picture of upper iris a diameter of 52 and terminal face-image；
The pixel of starting point face-image is 2448*3264, and it is 9.5 centimetres that sighting distance, which is calculated, according to formula.
The pixel of terminal face-image is 2448*3264, and it is 10.8 centimetres that sighting distance, which is calculated, according to formula.
Therefore it obtains：
Astigmatism diopter=- 1/0.108+1/0.095 ≈ 1.25D
Since astigmatism starting point is near point, astigmatism terminal sighting distance is more than near point, this artificial simple hyperopic astigmatism.
In the prescription that rafractive provides, the astigmatism diopter of left eye is 1.0D.When preparing glasses, optist provides
The glasses left eye mean of cylindrical diopter of consumer's subjective observation environment is 1.5D.
By the result of calculation of this method compared with the opticians degree number that optist provides, the result of calculation of the present embodiment is should
The suitable number of degrees of consumer's current state.The diopter of same process measurement another eyes, obtains the suitable number of degrees.
Embodiment 4
Certain consumer 14 years old, 150 centimetres of height, male, the time after school are in the normal natural light in classroom, are using mobile phone
Iphone stands by the window, and blocks right eye, holds the diopter measurement that mobile phone carries out left eye, mobile phone is generally remained in moving process
At the uniform velocity, the sight of left eye observation is substantially and screen vertical.
1. eye state determines
Consumer's handheld terminal is pressed by the movement close to face from the near to the distant when consumer has just seen clear E marks
Camera button obtains near point face-image, and consumer clicks storage key.
A diameter of 327 pixel on the picture of near point face-image.The pixel of near point face-image is 1920*2560, according to public affairs
Y=1.5*1920/327=8.8 centimetres of sighting distance is calculated in formula, substitutes into formula and calculates near point diopter=- 11.36D ≈-
11.5D。
The amplitude of accommodation=15-0.25*18=11.5D, then：- 11.5+11.5=0 obtains this artificial emmetropia.
2. simple astigmatism diopter measurement
Mobile phone is by slowly separate facial from the near to the distant from close face, during whole process arm stretches to farthest
Each line color depth variation of astigmatism disk is not found, then this person is without astigmatism.Finally obtain this artificial normal eyes.
Claims (10)
1. a kind of analytical measurement system of human eye diopter, it is characterised in that：Including camera and graphics process computing module, institute
The face-image of consumer of the camera for obtaining different location is stated, graphics process computing module is according to calculated consumer
The different conditions of eyes call myopic refractive degree calculating process corresponding with state, hyperopic refractive degree calculating process or pure to dissipate
Light diopter calculating process finally provides human eye diopter result.
2. a kind of measurement method of the analytical measurement system of human eye diopter according to claim 1, it is characterised in that：Packet
Include following steps：
(1) the terminal movement with camera and the from the near to the distant face far from consumer, the simple eye naked eye terminal of consumer are made
The sighting target of setting, when consumer just sees clearly sighting target, camera obtains consumer's near point face-image；
(2) diameter on the picture of iris is calculated near point face-image；
(3) according to the corresponding iris of near point face-image as upper diameter calculation goes out simple eye near point sighting distance；
(4) near point diopter is calculated according near point stadimeter, consumer is judged with the operation result of near point diopter and the amplitude of accommodation
The state of eyes；
When the sum of near point diopter and the amplitude of accommodation are less than zero, eyes are myopia, into myopic refractive degree calculating process；
When the sum of near point diopter and the amplitude of accommodation are more than zero, eyes are farsightedness, into hyperopic refractive degree calculating process；
When the sum of near point diopter and the amplitude of accommodation are zero, eyes are emmetropia, are calculated into simple astigmatism diopter
Journey.
3. a kind of analysis measurement method of human eye diopter according to claim 2, it is characterised in that：Myopic refractive degree meter
Calculation process includes the following steps：
A. make the terminal movement with camera and from the distant to the near close to the face of consumer, the simple eye naked eye terminal of consumer
The sighting target of setting, when consumer just sees clearly sighting target, camera obtains consumer's far point face-image；
B. diameter on the picture of iris is calculated in far point face-image；
C. according to the corresponding iris of far point face-image as upper diameter calculation goes out simple eye far point sighting distance；
D. according to far point stadimeter calculate myopic refractive degree, myopic refractive degree=- (1/ far point sighting distance)；
E. the measurement of renaturation Myopia astigmatism diopter is carried out.
4. a kind of analysis measurement method of human eye diopter according to claim 3, it is characterised in that：Renaturation Myopia dissipates
The measurement of light diopter includes the following steps：
The sighting target for replacing display is astigmatism dial plate；
A. make the terminal movement with camera and from the distant to the near close to the face of consumer, the simple eye naked eye terminal of consumer
The astigmatism dial plate of setting, when the arbitrary straight line color in astigmatism dial plate starts to deepen, camera obtains rising for consumer
Point face-image；
B. the terminal for carrying camera continues close to consumer's face, the astigmatic chart of the simple eye naked eye terminal setting of consumer
Disk, when the shade of all straight lines in astigmatism dial plate is consistent, camera obtains the terminal face-image of consumer；
C. diameter on the picture of iris in zequin face-image；
D. calculate terminal face-image in iris picture on diameter；
E. according to diameter calculation starting point sighting distance on the picture of the corresponding iris of starting point face-image；
F. according to diameter calculation terminal sighting distance on the picture of the corresponding iris of terminal face-image；
Renaturation Myopia astigmatism diopter is the difference of starting point diopter and terminal diopter.
5. a kind of analysis measurement method of human eye diopter according to claim 2, it is characterised in that：Hyperopic refractive degree meter
Calculation process includes the following steps：
A. make the terminal movement with camera and from the distant to the near close to the face of consumer, the simple eye naked eye terminal of consumer
The sighting target of setting, when reach suitably apart from when, camera obtains consumer operating position face-image；
B. diameter on the picture of iris is calculated in the face-image of operating position；
C. according to the corresponding iris of operating position face-image as upper diameter calculation goes out simple eye operating position sighting distance；
D. hyperopic refractive degree is calculated according to operating position sighting distance and near point stadimeter, hyperopic refractive degree be operating position diopter with
The difference of near point diopter；
E. the measurement of renaturation long sight astigmatism diopter is carried out.
6. a kind of analysis measurement method of human eye diopter according to claim 5, it is characterised in that：Renaturation long sight dissipates
The measurement of light diopter includes the following steps：
The sighting target for replacing display is astigmatism dial plate；
A. it carries the terminal movement of camera and the face far from consumer, the simple eye naked eye terminal of consumer is set from the near to the distant
The astigmatism dial plate set, when the arbitrary straight line color in astigmatism dial plate starts to deepen, camera obtains consumer's starting point face
Portion's image；
B. the terminal for carrying camera continues far from consumer's face, the astigmatic chart of the simple eye naked eye terminal setting of consumer
Disk, when the shade of all straight lines in astigmatism dial plate is consistent, camera obtains consumer's terminal face-image；
C. diameter on the picture of iris in zequin face-image；
D. calculate terminal face-image in iris picture on diameter；
E. according to diameter calculation starting point sighting distance on the picture of the corresponding iris of starting point face-image；
F. according to diameter calculation terminal sighting distance on the picture of the corresponding iris of terminal face-image；
Renaturation long sight astigmatism diopter is the difference of starting point diopter and terminal diopter.
7. a kind of analysis measurement method of human eye diopter according to Claims 2 or 3 or 4 or 5 or 6, it is characterised in that：
Simple astigmatism diopter calculating process includes the following steps：
A. it carries the terminal movement of camera and the face far from consumer, the simple eye naked eye terminal of consumer is set from the near to the distant
The astigmatism dial plate set：
If all straight line shades in astigmatism dial plate when mobile unanimously if exit active procedure and judge emmetropia without dissipating
Light；
If arbitrary straight line color when mobile in astigmatism dial plate is from light to dark, camera obtains consumer's starting point face figure
Picture；
B. the terminal for carrying camera continues far from consumer's face, the astigmatic chart of the simple eye naked eye terminal setting of consumer
Disk, when the shade of all straight lines in astigmatism dial plate is consistent, camera obtains consumer's terminal face-image；
C. diameter on the picture of iris in zequin face-image；
D. calculate terminal face-image in iris picture on diameter；
E. according to diameter calculation starting point sighting distance on the picture of the corresponding iris of starting point face-image；
F. according to diameter calculation terminal sighting distance on the picture of the corresponding iris of terminal face-image；
G. it is simple myopic astigmatism, near point regards if starting point sighting distance is less than near point sighting distance and terminal sighting distance is equal near point sighting distance
Away from for terminal sighting distance, simple myopic astigmatism diopter is the difference of starting point diopter and near point diopter；
It is simple hyperopic astigmatism, near point sighting distance if starting point sighting distance is equal near point sighting distance and terminal sighting distance is more than near point sighting distance
For starting point sighting distance, simple hyperopic astigmatism diopter is the difference of near point diopter and terminal diopter.
8. a kind of analysis measurement method of human eye diopter according to claim 7, it is characterised in that：The sighting distance is to disappear
The person of expense list eye iris center looks into value method by curve or computing method of formula obtains to the vertical range of screen.
9. a kind of measurement method of myopic refractive degree according to claim 8, it is characterised in that：
Establishing the process of curve is：
The iris of pre-production consumer face-image as the sample table between upper diameter and the sighting distance actually measured, by picture
The ratio of upper diameter and consumer's face-image width finds out engineer's scale；
(2) the coordinate system that the sighting distance actually measured is abscissa, engineer's scale is ordinate is established；
(3) curve is drawn in coordinate system according to sample table；
Looking into the process of value is：
(1) the numerical value of engineer's scale is obtained with the calculated width as upper diameter divided by the face image of people；
(2) the numerical value of the corresponding sighting distance of abscissa is searched according to the numerical value of engineer's scale on curve.
10. a kind of measurement method of myopic refractive degree according to claim 8 or claim 9, it is characterised in that：The formula calculates
Method uses following formula：
Wherein, Y is distance, and K values are the pixel value that 1.5 ± 0.2, W is face-image width, and D is diameter on the picture of iris.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112274104A (en) * | 2019-07-22 | 2021-01-29 | 艾科股份有限公司 | Method and apparatus for refractive and visual measurement |
| CN114052654A (en) * | 2021-11-15 | 2022-02-18 | 云智道智慧医疗科技(广州)有限公司 | Dynamic eye health management system |
| CN116171124A (en) * | 2020-07-29 | 2023-05-26 | 卡尔蔡司光学国际有限公司 | Method for determining a near point, method for determining a near point distance, method for determining a sphere power and method for producing an ophthalmic lens, and corresponding mobile terminal and computer program |
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| US11867984B2 (en) | 2020-07-29 | 2024-01-09 | Carl Zeiss Vision International Gmbh | Methods for determining the near point, for determining the near point distance, for determining a spherical refractive power, and for producing a spectacle lens, and corresponding mobile terminals and computer programs |
| CN114052654A (en) * | 2021-11-15 | 2022-02-18 | 云智道智慧医疗科技(广州)有限公司 | Dynamic eye health management system |
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