CN104657702B - Eyeball arrangement for detecting, pupil method for detecting and iris discrimination method - Google Patents
Eyeball arrangement for detecting, pupil method for detecting and iris discrimination method Download PDFInfo
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- CN104657702B CN104657702B CN201310607136.4A CN201310607136A CN104657702B CN 104657702 B CN104657702 B CN 104657702B CN 201310607136 A CN201310607136 A CN 201310607136A CN 104657702 B CN104657702 B CN 104657702B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- 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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- 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
- A61B3/113—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining or recording eye movement
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Abstract
It includes optical module, image sensor and arithmetic element that the present invention, which provides a kind of eyeball arrangement for detecting, pupil method for detecting and iris discrimination method, the eyeball arrangement for detecting,.Optical module provides multiple tracks incident light and forms multiple bright spots to eyeball and in eyeball, and at least partly bright spot is located near the pupil of eyeball.Image sensor is for capturing eyeball image, and eyeball image includes the image of these bright spots.Arithmetic element analyzes the gray value of the image of eyeball, and the distributing position of these bright spots is obtained through the gray value of the image of eyeball, judges the position of pupil accordingly by the distributing position of these bright spots.
Description
Technical field
The present invention is about a kind of eyeball arrangement for detecting, and in particular to the carry out eyeball by eyeball arrangement for detecting
The method for detecting and iris discrimination method of tracking.
Background technique
Current eyeball arrangement for detecting can be used to detect eye movement direction, or can be carried out iris boundary identification.Big portion
Point eyeball arrangement for detecting using pupil with the change of sight the characteristic of shift position, to detect the direction of eyeball fixes.
In general, known eyeball arrangement for detecting is largely to be projeced on eyeball to be formed by bright spot using incident light
(glint) directions of eyeball fixes is detected, and known eyeball arrangement for detecting is usually using bright spot as the ginseng of the positioning of eyeball
Examination point.
Specifically, after the image for capturing eyeball, known eyeball arrangement for detecting can be from the cornea (Cornea) of eyeball
Image identification go out pupil and bright spot.During recognizing pupil, whole ball image of opening one's eyes can be scanned, by the whole ball of opening one's eyes of analysis
The gray value (gray scale value) of image is distributed and recognizes pupil and bright spot.Later, eyeball arrangement for detecting can be further
Ground obtains the relative position between pupil and bright spot, and relative position differentiates direction that eyeball is watched attentively accordingly.
Summary of the invention
The purpose of the present invention is to provide the eyeball arrangement for detecting that one kind can pick out pupil quickly.
Another object of the present invention is to provide one kind and be not required to penetrate to judge whole the first eyeball image or the second eyeball
The grey value profile of image is to obtain the detecting pupil method of the position of pupil and recognize iris method.
A further object of the present invention is to provide a kind of iris discrimination methods of boundary search speed for accelerating iris image.
The embodiment of the present invention provides a kind of eyeball arrangement for detecting, penetrates the distributing position of at least one epibulbar bright spot
The position of pupil is judged accordingly.
The embodiment of the present invention provides a kind of eyeball arrangement for detecting, and the eyeball arrangement for detecting includes optical module, image biography
Sensor and arithmetic element.Optical module provides multiple incident lights and forms multiple bright spots to eyeball and in eyeball, and at least partly
Bright spot is located near the pupil of the eyeball.Image sensor, for capturing the image of the eyeball, and the image of eyeball includes this
A little bright spots.Arithmetic element analyzes the gray value of the image of eyeball, and obtains these bright spots through the gray value of the image of eyeball
Distributing position, judge the position of pupil accordingly by the distributing position of these bright spots.
The embodiment of the present invention provides a kind of method for detecting pupil, through the distributing position for forming one or more bright spots
The position of pupil is judged accordingly.
The embodiment of the present invention provides a kind of method for detecting pupil, and the method for detecting includes providing one or more incident lights
It is incident to eyeball and forms one or more first bright spots in eyeball, and at least partly the first bright spot is located near pupil.From eye
Ball captures the first eyeball image, and the first eyeball image includes the image of multiple first bright spots and pupil.Analyze the first eyeball
The gray value of image is to obtain the distributing positions of these the first bright spots.Pupil is judged accordingly through the distributing position of these the first bright spots
The position in hole.
The embodiment of the present invention provides a kind of method for recognizing iris, can judge the deformation of iris image when eyeball displacement
Amount.
The embodiment of the present invention provides a kind of method for recognizing iris, and the method for the identification iris includes when eyeball is located at one
When reference position, issue the multiple incident light beam strikes of multiple tracks to eyeball, with formed near the pupil of the eyeball the first reference point,
The label of second reference point and third reference point to be located at reference position as eyeball, wherein the first reference point, the second reference
The position of point and third reference point is corresponding with the position at these incident light emittings.When eyeball is from reference position activity to one
When measurement position, these incident lights form the first measurement bright spot, the second measurement bright spot and third in eyeball and measure bright spot, and the
One measurement bright spot, the second measurement bright spot and third measurement bright spot are located near the pupil of eyeball.Capture the eyeball shadow of eyeball
Picture, eyeball image include these bright spots and iris image.The gray value of eyeball image is analyzed to obtain the first measurement bright spot, the
The position of two measurement bright spots and the bright measurement point of third.It is bright to calculate the first measurement bright spot, the second measurement bright spot and third measurement
Displacement caused by position of the position of point relative to the first reference point, the second reference point and third reference point, is obtained accordingly
Iris image of iris image of eyeball when being located at measurement position when being located at reference position relative to eyeball deformation quantity.
The embodiment of the present invention provides a kind of method for recognizing iris, can judge the change resolution amount of iris image.
The embodiment of the present invention provides a kind of method for recognizing iris, and the method for the identification iris includes providing multiple incidences
Light is incident to eyeball.The first reference point, the second reference point and third reference point are set to be located at reference position as eyeball
Label, wherein the position of the first reference point, the second reference point and third reference point and the position phase at these incident light emittings
It is corresponding.These incident lights form the first measurement bright spot, the second measurement bright spot and third in eyeball and measure bright spot, and first measures
Bright spot, the second measurement bright spot and third measurement bright spot are located near the pupil of eyeball, wherein the first measurement bright spot, the second survey
The position for measuring bright spot and third measurement bright spot is opposite with the position of the first reference point, the second reference point and third reference point
It answers.The eyeball image of eyeball is captured, eyeball image includes these bright spots and iris image.Analyze eyeball image gray value with
Obtain the position of the first measurement bright spot, the second measurement bright spot and the bright measurement point of third.Calculate the first measurement bright spot and second
Variation of the spacing relative to the first reference point and the spacing of the second reference point of bright spot is measured, and to calculate second measurement bright
Variation of the spacing of point and third measurement bright spot relative to the second reference point and the spacing of third reference point, obtains eye accordingly
Change resolution amount caused by iris image when ball is located at reference position.
In conclusion the embodiment of the present invention provides the detecting of eyeball arrangement for detecting and eyeball (such as pupil and iris) and distinguishes
Knowledge method.The eyeball arrangement for detecting includes optical module, image sensor and arithmetic element.The detecting of the eyeball tracking
Method may determine that the grey value profile of the neighboring area near the bright spot in the first eyeball image by arithmetic element, to obtain
Obtain the position of pupil.Therefore, arithmetic element is not required to penetrate the grey value profile for judging whole the first eyeball image to obtain pupil
Position.Well-known technique is compared, the eyeball arrangement for detecting of the embodiment of the present invention can pick out pupil quickly.
The embodiment of the present invention provides the method for detecting of eyeball arrangement for detecting and eyeball tracking, the eyeball arrangement for detecting packet
Include optical module, image sensor, arithmetic element and control unit.Difference is controlled in different time points by control unit
Incident light beam strikes position, the bright spot position in eyeball image so as to adjust different time points, and then via image phase
Bright spot position can be more confirmed through gray value and special pattern after subtracting step, help to reduce and find wrong bright spot position
Probability.Arithmetic element can only judge the grey value profile of the neighboring area near the distributing position of the bright spot in Difference image,
So as to be able to the position for accelerating to obtain pupil P1.For comparing well-known technique, arithmetic element, which is not required to penetrate, judges whole first
The grey value profile of eyeball image or the second eyeball image is to obtain the position of pupil.
The embodiment of the present invention provides the method for identification iris, and the method for the identification iris calculates the by arithmetic element
One measurement bright spot, second measurement bright spot and third measurement bright spot position relative to the first reference point, the second reference point and
Displacement caused by the position of third reference point can calculate the ellipse long and short shaft of iris image, to estimate out accordingly
The oval boundary of iris image, and then accelerate the boundary search speed of iris image.
The embodiment of the present invention provides the method for identification iris, and the method for the identification iris calculates the by arithmetic element
After one variable quantity, the second variable quantity and third variable quantity, the boundary of iris image is estimated out, and then accelerate the side of iris image
Boundary's search speed.
In order to be further understood that technology, method and effect adopted by the present invention, please refer to below in connection with the present invention
Detailed description, schema, it is believed that feature and feature of the invention, when can thus be able to deeply and it is specific understand, however it is appended
Schema is only for reference and description with attachment, is not intended to limit the present invention.
Detailed description of the invention
Figure 1A is the schematic side view of the eyeball arrangement for detecting of first embodiment of the invention.
Figure 1B is the front-view schematic diagram of the eyeball arrangement for detecting of first embodiment of the invention.
Fig. 1 C is the functional block diagram of the eyeball arrangement for detecting of first embodiment of the invention.
Fig. 1 D is the flow diagram for the pupil method for detecting that first embodiment of the invention provides.
Fig. 2A is the front-view schematic diagram of the eyeball arrangement for detecting of second embodiment of the invention.
Fig. 2 B is the flow diagram for the pupil method for detecting that second embodiment of the invention provides.
Fig. 2 C is the flow diagram of the pupil method for detecting of second embodiment of the invention.
Fig. 3 A is the functional block diagram of the eyeball arrangement for detecting of third embodiment of the invention.
Fig. 3 B is the flow diagram for the pupil method for detecting that third embodiment of the invention provides.
Fig. 4 is the flow diagram of iris discrimination method provided in an embodiment of the present invention.
Fig. 5 is the flow diagram of iris discrimination method provided in an embodiment of the present invention.
Appended drawing reference
100,200,300 eyeball arrangement for detecting
110,210 optical module
112,212 light source
114,214 spectrum groupware
120 image sensors
130,230 arithmetic element
150 bearing frames
152 frames
154 mirror pins
340 control units
L1 incident light
M1 inspects region
E1 eyeball
G1 bright spot
The first bright spot of G1a
The second bright spot of G1b
P1 pupil
I1 iris
S101~S104 step
S201~S204 step
S301~S307 step
S401~S405 step
S501~S506 step
Specific embodiment
Figure 1A is the schematic side view of the eyeball arrangement for detecting of first embodiment of the invention, and Figure 1B is that the present invention first is implemented
The front-view schematic diagram of the eyeball arrangement for detecting of example, and Fig. 1 C is the function block of the eyeball arrangement for detecting of first embodiment of the invention
Figure.Figure 1A to Fig. 1 C is please referred to, eyeball arrangement for detecting 100 includes optical module 110, image sensor 120 and arithmetic element
130.Optical module 110 provides at least one incident light L1 to form at least one bright spot G1 near pupil P1.Image passes
Sensor 120 is for capturing eyeball image, and eyeball image includes the image of bright spot G1.Arithmetic element 130 analyzes eyeball image
Gray value, and the distributing position of bright spot G1 is obtained according to this.In addition, arithmetic element 130 can by bright spot G1 distributing position accordingly
Judge the position pupil P1.
Eyeball arrangement for detecting 100 can be installed on frame, can also be installed in running gear notebook computer
Either on the panel of smartphone.In this present embodiment, eyeball arrangement for detecting 100 is the eyeball arrangement for detecting of a spectacle
100, and optical module 110 and image sensor 120 are all installed in bearing frame 150.Bearing frame 150, which is available for users to, matches
It wears, and optical module 110 and image sensor 120 is all located in front of eyeball E1.But, in other embodiments,
Eyeball arrangement for detecting 100 can also be installed on running gear, e.g. before notebook computer either smartphone
It sets on camera lens or panel.But, the present invention is limited not to this.
In practice, bearing frame 150 can be a mirror holder, and including two frames 152 and two respectively with mirror
The mirror pin 154 that frame 152 connects.Mirror pin 154 is placed on ear by user, and before frame 152 is located at eyeball E1.But, it carries
The design of frame 150 only supplies for example, the present invention is not limited bearing frame 150.
Optical module 110 can emit an at least incident light L1 to eyeball E1.These incident lights L1 is fallen on eyeball E1, and
It can be reflected on iris I1 to form an at least bright spot G1, wherein bright spot G1 is located near pupil P1.In the present embodiment, enter
One of incident light L1 to eyeball E1 is penetrated, so that the quantity of bright spot G1 is one.It is worth noting that, incident light L1 is black light
(invisible light), e.g. infrared light (infrared light, IR) or near infrared light (near infrared
Light, NIR), and iris I1 structural outside layers are covered with cornea (Cornea) as a smooth surface, therefore each direction incident light
Can all form a reflection bright spot on the light path above the cornea with image sensor, thus L1 incident light can then be formed one with
Upper bright spot G1.
Specifically, optical module 110 may include an at least light source 112 and an at least spectrum groupware 114, and optics
Component 110 provides at least one incident light L1 by light source 112 and spectrum groupware 114.In practice, light source 112 can be with
It is light emitting diode (Light Emitting Diode, LED), and spectrum groupware 114 can have the function of leaded light, and have more
A optical microstructures, wherein optical microstructures can be printed patterns, groove or fin, and groove is, for example, V-type ditch (V-cut).
When the light provided by the light source 112 is incident to spectrum groupware 114, and light can be reflected by these optical microstructures, refraction or
Scattering, so as to be emitted from going out from light for spectrum groupware 114.
Image sensor 120 is for capturing eyeball image.It is worth noting that the wavelength that image sensor 120 is sensed
Range covers the wave-length coverage of incident light L1.The eyeball image energy captured shows the eye of user, the e.g. white of the eye (not
Mark), iris I1 and pupil P1 etc..In addition, further including the bright spot G1 in the eyeball image captured.Specifically, shadow
Incident light L1 is incuded as sensor 120 penetrates photosensory assembly, and photosensory assembly can be complementary metal oxide semiconductor sense
Survey component (Complementary Metal-Oxide-Semiconductor Sensor, CMOS sensor) or Charged Couple
Component (Charge-Coupled Device, CCD).
Arithmetic element 130 can be digital signal processor (Digital Signal Processor, DSP) either in
Central processor (Central Processing Unit, CPU).Arithmetic element 130 analyzes the eye that image sensor 120 is captured
The grey value profile of ball image, and the distributing position of bright spot G1 is obtained through the grey value profile of eyeball image, thus
The position of pupil P1 is judged with the distributing position according to bright spot G1.
Fig. 1 D is the flow diagram for the pupil method for detecting that first embodiment of the invention provides.Please refer to Figure 1B, Fig. 1 C
And Fig. 1 D.
Step S101 is executed, when user uses eyeball arrangement for detecting 100, e.g. user wears and detects configured with eyeball
When surveying the bearing frame 150 of device 100, optical module 110 is enabled to provide one of incident light L1 to eyeball E1.Incident light L1 falls in eye
It on ball E1, and can be located near pupil P1, such as the neighbouring region iris I1, reflect to form a bright spot G1.
It is worth noting that, the ornaments position of light source 112 or the configuration of light source 112 and spectrum groupware 114 can adjust
Whole incident light L1 is incident in the region iris I1 near pupil P1.That is, the position of bright spot G1 can be sent out with incident light L1
The change of the position at the place of penetrating and change, that is, the position of bright spot G1 correspond to incident light L1 transmitting at position.
Then, step S102 is executed, shoots eyeball E1 through image sensor 120 to capture the first eyeball image.Image
First eyeball image captured by sensor 120 can show the image of the eye of user and the image of the bright spot G1.
Then, the data of the first captured eyeball image are transmitted to arithmetic element 130 by image sensor 120.
Then, step S103 is executed, arithmetic element 130 analyzes the gray value of the first eyeball image, to obtain bright spot G1's
Distributing position.By taking 8 256 color shade values as an example, gray value is finally quantified as 256 face to pure white variation by black to ash
Color, and the range of gray value is 0 to 255.It is worth noting that the gray value of bright spot G1 is close or equal to 255 mostly, and pupil
The gray value of P1 is then closer to 0 relative to the gray value of bright spot G1.Gray value point of the arithmetic element 130 through the first eyeball image
Cloth, after can learning position, shape and the range size that the pixel of gray value close to maximum value in all pixels is distributed,
And the position that the pixel for further deducing the position bright spot G1 in corresponding first eyeball image is distributed.
Then, step S104 is executed, arithmetic element 130 judges the position of pupil P1 through the distributing position of bright spot G1 accordingly
It sets.Specifically, arithmetic element 130 is first chosen threshold grey scale value appropriate (threshold gray scale value), and
The gray value of pupil P1 in first eyeball image is less than the threshold grey scale value, and multiple bright spot G1 in the first eyeball image
Gray value be greater than the threshold grey scale value.
After the distributing position of confirmation bright spot G1, arithmetic element 130 scans inspecting near bright spot G1 distributing position
Grey value profile in region M1 (as shown in Figure 1B), and judge in the gray value institute for inspecting the first eyeball image in the M1 of region
Less than the part of threshold grey scale value.Wherein, inspecting region M1 can be defined e.g. by the position of bright spot G1, and inspecting region M1 can
To set the region for the distributing position for being slightly larger than and covering bright spot G1 and pupil.It is worth noting that bright spot G1 can position
In the boundary for inspecting region M1 or inspect inside the M1 of region.User can according to pupil P1 position range size to be searched and
The range for inspecting region M1 is set through arithmetic element 130.The present invention is not limited the range size for inspecting region M1.
When arithmetic element 130 judge inspect region M1 have a specific region gray value be less than threshold grey scale value it
Afterwards, further judge whether the shape of the specific region meets the shape of pupil P1 to reduce the machine of the erroneous judgement position pupil P1
Rate.For example, arithmetic element 130, which judges to meet the specific region less than threshold grey scale value, rectangle and circle, then
It can determine whether that circular specific region more meets the shape of pupil P1 compared with the specific region of rectangle, that is, level off to circle.In addition,
In order to more reduce the probability of the erroneous judgement position pupil P1, the area value of the pupil P1 image in the first eyeball image can be first established
Range, and arithmetic element 130 may determine that whether the scale of specific region falls into the area value of the pupil P1 image
Within the scope of, further to reduce the probability of the erroneous judgement position pupil P1.
It is worth noting that arithmetic element 130 can be analyzed only in the first eyeball image through above-mentioned pupil method for detecting
Bright spot G1 near the grey value profile for inspecting region M1, with reduce find pupil P1 range, so as to be able to accelerate obtain
Obtain the position of pupil P1.For comparing known techniques, arithmetic element 130 is not required to analyze the gray value point of whole the first eyeball image
Cloth finds the position of pupil P1.
Fig. 2A is the schematic side view of the eyeball arrangement for detecting of second embodiment of the invention, and Fig. 2 B is that the present invention second is implemented
The functional block diagram of the eyeball arrangement for detecting of example.Please refer to Fig. 2A and Fig. 2 B, the eyeball arrangement for detecting 200 of second embodiment with
Both eyeball arrangement for detecting 100 of first embodiment structure is similar, such as eyeball arrangement for detecting 100 and 200 equally all includes light
Learn component 110 and image sensor 120.But, still there is difference between eyeball arrangement for detecting 100 and 200.It is just directed to eye below
Difference between ball arrangement for detecting 200 and eyeball arrangement for detecting 100 is described in detail, and same characteristic features then repeat no more.
The eyeball arrangement for detecting 200 of second embodiment includes optical module 210, image sensor 120 and arithmetic element
130.Optical module 110 provides multiple incident light L1 to form multiple bright spot G1 near pupil P1.Image sensor 120 is used
In acquisition eyeball image, and eyeball image includes the image of these bright spots G1.The gray scale of the analysis eyeball image of arithmetic element 130
Value, and the distributing position of these bright spots G1 is obtained according to this.In addition, arithmetic element 130 can be by the distributing position of these bright spots G1
The position pupil I1 is judged accordingly.
Optical module 210 can emit multiple tracks incident light L1 to eyeball E1.These incident lights L1 is fallen on eyeball E1, and energy
To form multiple bright spot G1, the wherein at least bright spot G1 of part is located near pupil P1 for reflection on iris I1.
Light can be divided into using only the light source 212 of one or negligible amounts with spectrum groupware 214 by the present embodiment
A plurality of incident light L1.Either, optical module 210 can also include multiple light sources 212 without including any spectrum groupware 214,
And optical module 210 provides multiple tracks incident light L1 by these light sources 212.Therefore, the present invention does not limit 212 quantity of light source
And the structure of spectrum groupware 214 is limited.
Fig. 2 C is the flow diagram for the pupil method for detecting that first embodiment of the invention provides.Please refer to Fig. 2A, Fig. 2 B
And Fig. 2 C.
Step S201 is executed, when user uses eyeball arrangement for detecting 200, optical module 210 is enabled to provide multiple tracks incident light
L1 to eyeball E1, and can reflect in the region iris I1 being located near pupil P1 to form multiple bright spot G1.
It is worth noting that, the position of bright spot G1 can change with the change of the position at incident light L1 transmitting.Citing
For, it is assumed that the position at four incident light L1 transmittings is provided, and the position at this four incident light L1 transmittings is about rectangle
Arrangement and length-width ratio is about 2 to 1, then four bright spot G1 will occur in the region iris I1 near pupil P1, and bright spot G1
Arrangement is also in principle rectangular arranged and length-width ratio is 2 to 1.
Then, step S202 is executed, captures the first eyeball image from eyeball E1 through image sensor 120.Image sensing
First eyeball image captured by device 120 can show the image of the eye of user and the image of the bright spot G1.Then,
The data of the first captured eyeball image are transmitted to arithmetic element 130 by image sensor 120.
Then, step S203 is executed, arithmetic element 130 can be learnt through the grey value profile of the first eyeball image
After the pixel of gray value close to maximum value is distributed in all pixels position, shape and range size, and further speculate
The position that the pixel of the position bright spot G1 in the first eyeball image is distributed is corresponded to out.
Then, step S204 is executed, arithmetic element 130 judges pupil P1's through the distributing position of these bright spots G1 accordingly
Position.Specifically, arithmetic element 130 first chooses threshold grey scale value appropriate, and multiple bright spot G1 in the first eyeball image
Gray value be greater than the threshold grey scale value.After the distributing position of confirmation bright spot G1, arithmetic element 130 scans these bright spots
The grey value profile inspected in region M1 (as shown in Figure 2 A) near G1 distributing position, and judge inspecting in the M1 of region
The part of the be less than threshold grey scale value of gray value of first eyeball image.
It is worth noting that inspecting region M1 can be defined by the position of these bright spots G1.E.g., inspecting region M1 can
To be slightly larger than and cover the region of the distributing position of these bright spots G1 and pupil, it is also possible to be enclosed by these bright spots G1
Around forming.
Similarly, in order to reduce the probability of the erroneous judgement position pupil P1, judge have inspecting region M1 in arithmetic element 130
Interior one be less than threshold grey scale value specific region after, judge the shape of the specific region whether meet the shape of pupil P1 with
And judge whether the scale of specific region falls within the scope of the area value of the pupil P1 image.
It is worth noting that arithmetic element 130 can only transmit multiple bright spot G1 definition through above-mentioned pupil method for detecting
The range or shape of region M1 is inspected out, to reduce the range for finding pupil P1, so as to be able to accelerate to obtain pupil P1's
Position.
Fig. 3 A is the functional block diagram of the eyeball arrangement for detecting of third embodiment of the invention.Fig. 3 A is please referred to, third is implemented
The eyeball arrangement for detecting 300 of example is similar to 200 the two structure of eyeball arrangement for detecting of second embodiment, such as eyeball arrangement for detecting
300 and 200 equally all include optical module 210 and image sensor 120.But, between eyeball arrangement for detecting 300 and 200 still
There is difference.It is just described in detail below for the difference between eyeball arrangement for detecting 300 and eyeball arrangement for detecting 200,
And same characteristic features then repeat no more.
The eyeball arrangement for detecting 300 of 3rd embodiment includes optical module 210, image sensor 120, arithmetic element 230
And control unit 340.Optical module 210 provides multiple incident light L1 to form multiple bright spot G1 near pupil P1.Control
Unit 340 processed can control the time point of incident light beam strikes to eyeball E1, i.e. control unit 340 can control optical module 110 in not
Same time point provides incident light L1 to eyeball E1 respectively.Image sensor 120 is used to capture the eyeball image of different time points,
And eyeball image respectively includes these bright spots G1a or G1b, i.e., it is all aobvious among the eyeball image that different time points are captured
Bright spot G1a or G1b are shown.Arithmetic element 230 is analyzed in the gray value of the eyeball image of different time points, and obtains this according to this
The distributing position of a little bright spot G1, and the position pupil I1 is judged by the distributing position of bright spot G1a and G1b accordingly.
Specifically, control unit 340, which is used to control optical module 210, provides the incident light L1 time for being incident to eyeball E1
Point, that is to say, that control unit 340 controls optical module 210 and provides incident light L1 respectively in different time points.Image sensing
Device 120 is used to capture the eyeball image in different time points, and these all show in the eyeball image that different time points are captured
Bright spot G1a or G1b out.Gray scale of the arithmetic element 230 in addition to judging and analyzing these eyeball images under different time points
Except value, arithmetic element 230 can more transmit instruction to control unit 340, so that control unit 340 be made to control optical module
210 provide the time point of incident light L1.
Fig. 3 B is the flow diagram for the pupil method for detecting that second embodiment of the invention provides.Please refer to Fig. 3 A and figure
3B。
Step S301 is executed, control unit 340 controls optical module 210 and provides multiple tracks incident light L1 in first time point.
These incident lights L is incident to the reflection of the region iris I1 near pupil P1 to form multiple first bright spot G1a, and the first bright spot
The position of G1a corresponds to the position at incident light L1 transmitting.It is worth noting that the present embodiment can be used including multiple light sources
112 without the optical module 210 including any spectrum groupware 114.
Then, step S302 is executed, is captured through image sensor 120 in the first eyeball image of first time point.Shadow
The first eyeball image as captured by sensor 120 is eye captured in first time point, and showing user
The image of the image in portion and the first bright spot G1a.And image sensor 120 transmits the data of the first captured eyeball image
To arithmetic element 230.
Then, step S303 is executed, control unit 340 controls optical module 210 and provides multiple tracks incidence in the second time point
Light L1 is incident to the region iris I1 near pupil P1.Incident light L1 is reflected to form multiple second bright spot G1b, Er Qie once again
The position of two bright spot G1b corresponds to the position at incident light L1 transmitting.It is worth noting that, second time point is different from the
One time point, and the position of the second bright spot G1b is formed by the second time point and to be formed by first in first time point bright
The position of point G1a is different.Specifically, in first time point, only the light source 112 of part issues incident light L1, and second
When time point, only the light source 112 of another part issues incident light L1.
For example, the quantity of light source 212 can be four, and rectangular arranged can be presented in the position of this four light sources 212,
Wherein the length-width ratio of rectangle is 2 to 1.Control unit 340 can control four light sources 212 and first only provide it in first time point
In be located at two diagonal light sources 212, and control unit 340 is located at two in addition diagonal light at the second time point in control
Source 212.But, it is worth noting that, the position of the light source 212 of the present invention provided incident light L1 not lower for different time points
It sets and quantity limits, also do not limit these light sources 212 with the sequence of light of different time points.
Then, step S304 is executed, is captured through image sensor 120 in the second eyeball image at the second time point.Shadow
The image of the eye of user and the shadow of the second bright spot G1b are shown in the second eyeball image as captured by sensor 120
Picture.And the data of the second captured eyeball image are transmitted to arithmetic element 230 by image sensor 120.
It is worth noting that the first time point is certain a period of time that user begins to use eyeball arrangement for detecting 300
Between point, and the second time point was to be different from another time point of first time point.First eyeball image is then image sensor 120
The captured eyeball image in first time point, and the second eyeball image is then image sensor 120 at the second time point
Captured eyeball image.
Then, step S305 is executed, analyzes the gray value of the first eyeball image and the second eyeball image to obtain first
The distributing position of bright spot G1a and the second bright spot G1b.Specifically, arithmetic element 230 analyze respectively the first eyeball image and
The grey value profile of second eyeball image can learn all gray values among the first eyeball image and the second eyeball image
Position, shape and the range being distributed close to the pixel of maximum value.According to this, through the close maximum of all gray values of analysing and comparing
Position, shape and the range that the pixel of value is distributed, and further deduce the first eyeball image and the second eyeball image
In all first bright spot G1a and the second position bright spot G1b.
Then, step S306 is executed, image is executed to the first eyeball image and the second eyeball image and subtracts each other (Image
Subtraction).It is worth noting that, in the present embodiment, the quantity of light source 212 is four, in the first eyeball image,
First bright spot G1a is only provided by being wherein located at two diagonal light sources 212.And in the second eyeball image, the second bright spot G1b
It is provided by two in addition diagonal light sources 212.By the first eyeball image and the gray scale of the second corresponding pixel of eyeball image
Value is subtracted each other, it will the Difference image of this obtained two width image, such as the difference gray value of Difference image will be between -255 to 255
Between.
It is worth noting that due to the first bright spot G1a image position and the second eyeball image in the first eyeball image
In the second bright spot G1b image position do not overlap, according to this, execute image in the first eyeball image and the second eyeball image and subtract each other
Later among generated Difference image, the gray scale of corresponding first bright spot G1a image position and the second bright spot G1b image position
Value is extreme value.For example, according to this, the first position bright spot G1a among the Difference image, in corresponding first eyeball image
Gray value highest, and the gray value (e.g. negative gray value) of the second position bright spot G1b in corresponding second eyeball image is most
It is low.
According to this, among the Difference image, correspond to two the first bright spot G1a and two the second positions bright spot G1b
Gray value show a special pattern.And this special pattern is defined by two most bright spots and two most dim spots.But, exist
In other embodiments, it can be and the first eyeball image is subtracted with the second eyeball image, thus among its Difference image, corresponding the
The gray value highest of the position bright spot G1 in two eyeball images, and the gray value of the position bright spot G1 in corresponding first eyeball image
It is minimum.The present invention limits not to this.
Furthermore, it is understood that when arithmetic element 230 is when judging the position of the first bright spot G1a and the second bright spot G1b, according to
Position that the pixel that Difference image analyzes all gray values close to maximum value (255) and minimum value (- 255) is distributed, shape with
And range and deduce the position of the first bright spot G1a and the second bright spot G1b in Difference image.Then, arithmetic element 230 judges institute
Whether the position arrangement of the first bright spot G1a or the second bright spot G1b that deduce correspond to above-mentioned special pattern, and then more into one
The position of the first bright spot G1a and the second bright spot G1b in step confirmation Difference image.
Accordingly, the position of different incident light L1 incidence is controlled in different time points by control unit 340, so as to
Change the first bright spot G1a in the eyeball image of different time points and the second position bright spot G1b, and via image subtraction step
After can more confirm the first bright spot G1a and the second position bright spot G1b through gray value and the special pattern, help to drop
The low probability for finding the mistake position bright spot G1.
Then, step S207, distributing position of the arithmetic element 230 through the first bright spot G1a and the second bright spot G1b are executed
The position of pupil P1 is judged accordingly.Specifically, arithmetic element 230 first chooses appropriate threshold grey scale value, and original first image
In the gray value of pupil P1 be less than the threshold grey scale value, and multiple first bright spot G1a or second in Difference image are bright
The absolute value of the gray value of point G1b is greater than the threshold grey scale value.Using threshold grey scale value, arithmetic element 230 can confirm that these
The distributing position of first bright spot G1a or the second bright spot G1b.In the distribution position of confirmation the first bright spot G1a or the second bright spot G1b
After setting, inspected in the M1 of region near the distributing position of the scanning of arithmetic element 230 first bright spot G1a or the second bright spot G1b1
Grey value profile, and judge in the portion for the be less than threshold grey scale value of gray value for inspecting original first image in the M1 of region
Part.
For example, among the Difference image, corresponding first bright spot G1a image position and the second bright spot G1b shadow
The gray value of image position is extreme value, the gray value highest of the first position bright spot G1a in corresponding first eyeball image, and corresponding the
The gray value of the second position bright spot G1b in two eyeball images is minimum.According to this, arithmetic element 230 penetrates the threshold grey scale value
The position of the first bright spot G1a is confirmed, so that arithmetic element 230, which scans, inspects the gray scale in the M1 of region near the first bright spot G1a
Distribution value judges the position of pupil P1 accordingly.
It is worth noting that inspecting region M1 can be defined by these the first bright spot G1a and/or the second bright spot G1b.It inspects
Region M1 can be less times greater than and cover the region that the distributing position of the first bright spot G1a or the second bright spot G1b is surrounded.
Either, region M1 is inspected to be also possible to be surrounded by the first bright spot G1a or the second bright spot G1b.User can be according to
The range for inspecting region M1 is set through arithmetic element 230 according to the pupil searched P1 position range size.The present invention is not
The range size for inspecting region M1 is limited.
When arithmetic element 230 judge inspect region M1 have a specific region gray value be less than threshold grey scale value it
Afterwards, that is, judge the specific region shape and scale whether close to the pupil P1 image in difference image to reduce
Judge the probability of the position pupil P1 by accident.
Based on above-mentioned, through pupil method for detecting of the invention, arithmetic element 230 can only judge in Difference image
The grey value profile for inspecting region M1 near the distributing position of one bright spot G1a or the second bright spot G1b, so as to be accelerated
Obtain the position of pupil P1.For comparing well-known technique, arithmetic element 230 be not required to through judge whole the first eyeball image or
The grey value profile of second eyeball image is to obtain the position of pupil P1.
Fig. 4 is the flow diagram of the method for iris identification provided in an embodiment of the present invention, and the iris of the present embodiment is distinguished
The method of knowledge can use the eyeball arrangement for detecting of Fig. 2A.Fig. 4 and cooperation are please referred to refering to Fig. 2A.
Carry out step S401, when eyeball E1 is located at a reference position, sending multiple tracks incident light L1 to eyeball E1 on, with
Multiple bright spot G1 are formed near the pupil P1 of eyeball E1, wherein the distributing position of these bright spots G1 is respectively as the first reference
Point, the second reference point and third reference point.
Specifically, multiple tracks incident light L1 can be provided by light source 212 and spectrum groupware 214, so that multiple tracks enters
Penetrate is at multiple light out of spectrum groupware 214 at light L1 transmitting.Either, multiple tracks incident light L1 can also be by least three
Light source 212 is provided without including any spectrum groupware 214, thus putting for these light sources 212 at multiple tracks incident light L1 transmitting
Set place.The adjustable incident light L1 of configuration of the ornaments position or light source 212 and spectrum groupware 214 of light source 212 is incident in
The region iris I1 near pupil P1.
The label of first reference point, the second reference point and third reference point to be located at reference position as eyeball E1,
And this reference position is to provide the position of one group of reference data in subsequent iris identification step.In the present embodiment, in eye
In the state that ball E1 faces front, the default position multiple bright spot G1 corresponding at the L1 transmitting of these incident lights of user is as the
The position of one reference point, the second reference point and third reference point.Specifically, shape between the first reference point and the second reference point
At the first reference axis, the second reference axis is formed between the second reference point and third reference point, and the first reference axis and second refers to
Have between axis and refers to angle.In addition, in order to definitely clearly mark reference position, the present invention can further include setting
Four reference points or more other reference points.That is, the present invention is not limited the quantity of reference point.
In the present embodiment, the position at three incident light L1 transmittings is provided, and at this three incident light L1 transmittings
A right angle rounded projections arranged is presented in position, and two section chief's degree ratios of this right angled triangle are 2 to 1.Iris near pupil P1
Three bright spot G1 will occur in the region I1, and the arrangement of these bright spots G1 arranges phase with the position at incident light L1 transmitting in principle
Together.That is, in principle, the ratio between the length of the first reference axis and the length of the second reference axis is about 2 to 1, reference
Angle is 90 degree.
Then, step S402 is carried out, when eyeball E1 is from the reference position activity a to measurement position, these incident lights
L1 measures bright spot in the first measurement of eyeball E1 formation bright spot, the second measurement bright spot and third, and first measures bright spot, the second survey
Amount bright spot and third measurement bright spot are located near the pupil P1 of eyeball E1.Between first measurement bright spot and the second measurement bright spot
First axle is formed, forms the second axis between the second measurement bright spot and third measurement bright spot, and is had between first axle and the second axis
Angle.
Specifically, when eyeball E1 is rotated relative to reference position, due to the substantially three-dimensional ball of eyeball E1 shape
Shape, and iris I1 can protrude spherical surface is formed by the position multiple bright spot G1 and will change so incident light L1 is incident in iris I1,
And the bright spot G1 of changed position is the first measurement bright spot, the second measurement bright spot and third measurement bright spot.Namely
Say, when eyeball E1 sight deviate face front state when, the position bright spot G1 will by the first reference point, the second reference point and
The position of third reference point deviates to the position of the first measurement bright spot, the second measurement bright spot and third measurement bright spot.
Then, step S403 is carried out, captures eyeball image through image sensor 120.Captured by image sensor 120
Image, the first measurement bright spot, the second measurement bright spot, third measurement bright spot of the eye of user are shown in eyeball image
And the image of iris I1.Then, the data of captured eyeball image are transmitted to arithmetic element 130 by image sensor 120
Or 230.
Later, step S404 is carried out, analyzes the gray value of eyeball image to obtain the first measurement bright spot, the second measurement bright spot
And the position of third measurement bright spot.Specifically, arithmetic element 130 or 230 analyzes the grey value profile of eyeball image, can be with
Learn the position, shape that the pixel of all gray values close to maximum value (such as 255 gray value) among eyeball image is distributed
Shape and range.According to this, arithmetic element 130 or 230 is distributed through the pixel of analyse and compare all gray value close to maximum values
Position, shape and range, further deduce in eyeball image it is all first measurement bright spots, second measurement bright spot and
The position of third measurement bright spot.
Then, step S405 is carried out, the position of the first measurement bright spot, the second measurement bright spot and third measurement bright spot is calculated
Displacement caused by position relative to the first reference point, the second reference point and third reference point obtains eyeball E1 accordingly
The deformation quantity of iris I1 image when iris I1 image when positioned at measurement position is located at reference position relative to eyeball E1.In detail
For, variable quantity and angle of the first axle relative to the length of the first reference axis are calculated through arithmetic element 130 or 230
Variable quantity to obtain the first variable quantity, the second axis relative to the variable quantity of the length of the second reference axis and the variable quantity of angle
To obtain the second variable quantity, angle obtains third variable quantity relative to the variable quantity of reference angle.Accordingly, arithmetic element 130
Or 230 calculate iris image according to the first variable quantity, the second variable quantity and third variable quantity deformation quantity, it is advanced,
The deformation quantity ratio can be estimated according to the variation of the ratio of the one or two axis of the relative scale of first and second axis and original reference merely
It surveys, sensor in addition can be estimated according to first axle or the second shaft length to eyeball distance, and then estimate iris image size, accelerated
It searches.
It is worth noting that when eyeball E1 faces front and is located at reference position, rainbow captured by image sensor 120
Film image will relatively likeness in form round shape.When measurement position is identical as reference position, that is, eyeball E1 sight keeps facing the shape in front
When state, iris image captured by image sensor 120 will remain unchanged and be similar to round shape.When measurement position and reference position not
Meanwhile that is, eyeball E1 sight when deviateing the state for facing front, iris image captured by image sensor 120 will more shape
Like ellipticity.
After arithmetic element 130 or 230 calculates the first variable quantity, the second variable quantity and third variable quantity, Ke Yiju
To calculate the ellipse long and short shaft of iris image, to estimate out the oval boundary of iris image, and then accelerate iris image
Boundary search speed.
Fig. 5 is the flow diagram of the method for identification iris provided in an embodiment of the present invention.Please refer to Fig. 5 and cooperation ginseng
Fig. 2A is read, wherein the identification iris method of Fig. 5 embodiment is similar to both identification iris methods of Fig. 4 embodiment, and below can
It is described in detail for the difference between the method for both identification irises.
In the method for the identification iris of the present embodiment, firstly, carrying out step S501, multiple incident light L1 is provided and are incident to
Eyeball E1, to form multiple bright spot G1 on eyeball E1.Multiple tracks incident light L1 can be by light source 112 and spectrum groupware 114
There is provided, and be light at multiple tracks incident light L1 transmitting by spectrum groupware 114 it is multiple go out light position.Either, more
Road incident light L1 can also be provided by least three light sources 212 without including any spectrum groupware 214, so that multiple tracks is incident
It is the set-down location of these light sources 212 at light L1 transmitting.In addition, the ornaments position of light source 212 or light source 212 and spectrum groupware
The 214 adjustable incident light L1 of configuration is incident in the region iris I1 near pupil P1.
Step S502 is carried out, the first reference point of setting, the second reference point and third reference point as eyeball E1 to be located at
The label of reference position.In the present embodiment, reference position is the position that eyeball E1 faces front.Front is faced in eyeball E1
Under state, the default position multiple bright spot G1 corresponding at the L1 transmitting of these incident lights of user is as the first reference point, second
The position of reference point and third reference point.But, it is worth noting that reference position and being not required to shall be limited only to the extent eyeball E1 and facing
The position in front, reference position can also be the positions for deviateing front positioned at eyeball E1 sight.
Specifically, the first reference axis is formed between the first reference point and the second reference point, the second reference point and third are joined
The second reference axis is formed between examination point, and is had between the first reference axis and the second reference axis and referred to angle.In addition, in order to more
It is expressly understood that and marks reference position, the present invention can further include the 4th reference point of setting or more other reference points.Also
It is to say, the present invention is not limited the quantity of reference point.
In the present embodiment, the position at three incident light L1 transmittings is provided, and at this three incident light L1 transmittings
A right angle rounded projections arranged is presented in position, and two section chief's degree ratios of this right angled triangle are 2 to 1.Iris near pupil P1
Three bright spot G1 will occur in the region I1, and the arrangement of these bright spots G1 arranges phase with the position at incident light L1 transmitting in principle
Together.That is, in principle, the ratio between the length of the first reference axis and the length of the second reference axis is 2 to 1, with reference to folder
Angle is 90 degree.It is worth noting that, the default multiple bright spot G1 position conduct corresponding at the L1 transmitting of these incident lights of user
The position of first reference point, the second reference point and third reference point.
Step S503 is carried out, when eyeball E1 is located at measurement position, these incident lights L1 forms the first measurement in eyeball E1
Bright spot, the second measurement bright spot and third measure bright spot.First measurement bright spot, the second measurement bright spot and third measure bright spot
Position is located near the pupil P1 of eyeball E1, and the position with the first reference point, the second reference point and third reference point
It is corresponding.Form first axle between first measurement bright spot and the second measurement bright spot, the second measurement bright spot and third measurement bright spot it
Between form the second axis, and between first axle and the second axis have angle.
Specifically, when different users wears eyeball tracking device 200 or 300, optical module 210 is easy because making
The shape of face of user is different or bridge of the nose height is different and different from eyeball E1 distance, so incident light L1 incidence eyeball E1 is formed
The position the multiple bright spot G1 position bright spot G1 that will change, and be changed be that the first measurement bright spot, the second measurement are bright
Point and third measure bright spot.That is, the position bright spot G1 will be by first in the state that eyeball E1 sight remains unchanged
The position equal proportion of reference point, the second reference point and third reference point zoom to the first measurement bright spot, second measurement bright spot with
And the position of third measurement bright spot, and angle is identical as with reference to the angle of angle.
In the present embodiment, the ratio between the length of first axle and the length of the second axis is 2 to 1, accordingly, the first reference
Ratio between the length of axis and the length of the second reference axis is also 2 to 1.It is 90 degree with reference to angle, accordingly, angle is also 90
Degree.
Step S504 is carried out, captures eyeball E1 image through image sensor 120.Eye captured by image sensor 120
Image, the first measurement bright spot, the second measurement bright spot, third measurement bright spot and the iris I1 of eye are shown in ball image
Image.Then, the data of captured eyeball image are transmitted to arithmetic element 130 or 230 by image sensor 120.
Carry out step S505, analyze eyeball image gray value with obtain the first measurement bright spot, second measurement bright spot and
The position of the bright measurement point of third.Specifically, arithmetic element 130 or 230 analyzes the grey value profile of eyeball image, can learn
Position, shape and the range that the pixel of all gray values close to maximum value is distributed among eyeball image.According to this, through point
Analysis compares position, shape and the range that the pixel of all gray value close to maximum values is distributed, and deduces in eyeball image
It is all first measurement bright spots, second measurement bright spot and the bright measurement point of third position.It is worth noting that due to bright spot G1
Position correspond to the position at incident light L1 transmitting, therefore can be distributed by the pixel of all gray values close to maximum value
Position, shape and range and deduce the position bright spot G1 in the first eyeball image.
Step S506 is carried out, the position for calculating the first measurement bright spot, the second measurement bright spot and third measurement bright spot is opposite
The displacement caused by the position of the first reference point, the second reference point and third reference point obtains eyeball E1 accordingly and is located at
Change resolution amount caused by iris I1 image when reference position.Specifically, arithmetic element 130 or 230 is by image
Sensor 120 captures in eyeball image, calculate first axle relative to the variable quantity of the first reference axis with obtain the first variable quantity,
Second axis obtains the second variable quantity relative to the variable quantity of the second reference axis.Accordingly, arithmetic element 130 or 230 is according to
One variable quantity and the second variable quantity calculate the change resolution amount of iris image.
For example, if the first reference axis has 20 pixel values (pixels), the second reference axis has 10 pixel values, and the
Ratio between the pixel value of one reference axis and the pixel value of the second reference axis is 2 to 1.And arithmetic element 130 or 230 is counted
The first reference axis is calculated with 10 pixel values, the second reference axis has 5 pixel values.Then, arithmetic element 130 or 230 can be counted
It calculates the first variable quantity and the second variable quantity is respectively the pixel value scaled down 2 of the first reference axis and the second reference axis
Times.Accordingly, it is able to estimate out the boundary of iris image, and then accelerates the boundary search speed of iris image.
In conclusion the embodiment of the present invention provides the method for detecting of eyeball arrangement for detecting and eyeball tracking.The eyeball
Arrangement for detecting includes optical module, image sensor and arithmetic element.The method for detecting of the eyeball tracking is by operation list
Member can only judge the grey value profile for inspecting region near the bright spot in the first eyeball image, so as to be able to accelerate to obtain
The position of pupil.For comparing well-known technique, arithmetic element is not required to through the grey value profile for judging whole the first eyeball image
To obtain the position of pupil.
The embodiment of the present invention provides the method for detecting of eyeball arrangement for detecting and eyeball tracking, the eyeball arrangement for detecting packet
Include optical module, image sensor, arithmetic element and control unit.Difference is controlled in different time points by control unit
Incident light beam strikes position, the bright spot position in eyeball image so as to adjust different time points, and then via image phase
Bright spot position can be more confirmed through gray value and special pattern after subtracting step, help to reduce and find wrong bright spot position
Probability.Arithmetic element can only judge the grey value profile for inspecting region near the distributing position of the bright spot in Difference image,
So as to be able to the position for accelerating to obtain pupil.For comparing well-known technique, arithmetic element, which is not required to penetrate, judges whole First view
The grey value profile of ball image or the second eyeball image is to obtain the position of pupil.
The embodiment of the present invention provides the method for identification iris, and the method for the identification iris calculates the by arithmetic element
One measurement bright spot, second measurement bright spot and third measurement bright spot position relative to the first reference point, the second reference point and
Displacement caused by the position of third reference point can calculate the ellipse long and short shaft of iris image, to estimate out accordingly
The oval boundary of iris image, and then accelerate the boundary search speed of iris image.
The embodiment of the present invention provides the method for identification iris, and the method for the identification iris calculates the by arithmetic element
After one variable quantity, the second variable quantity and third variable quantity, the boundary of iris image is estimated out, and then accelerate the side of iris image
Boundary's search speed.
The above description is only an embodiment of the present invention, the scope of patent protection being not intended to limit the invention.It is any ripe
Alike those skilled in the art is practised, without departing from the spirit and scope of the invention, the equivalence replacement of made change and retouching, is still this hair
In bright scope of patent protection.
Claims (9)
1. a kind of method for recognizing iris, it is characterised in that the method for the identification iris includes:
When an eyeball is located at a reference position, issue on multiple tracks incident light to the eyeball, near the pupil of the eyeball
One first reference point, one second reference point and label of the third reference point to be located at reference position as the eyeball are formed,
In first reference point, second reference point and the third reference point position and the multiple tracks incidence light emitting at position
It is corresponding；
When the eyeball is from reference position activity a to measurement position, the multiple tracks incident light forms one near the pupil
First measurement bright spot, one second measurement bright spot and a third measure bright spot；
Capture an eyeball image of the eyeball, the eyeball image include the first measurement bright spot, the second measurement bright spot and this
The image and an iris image of three measurement bright spots；
It is bright to obtain the first measurement bright spot, the second measurement bright spot and third measurement to analyze the gray value of the eyeball image
The position of point；
The position of the first measurement bright spot, the second measurement bright spot and third measurement bright spot is calculated relative to one first reference
Displacement caused by the position of point, one second reference point and a third reference point obtains the eyeball accordingly and is located at the measurement
One deformation quantity of iris image when iris image when position is located at the reference position relative to the eyeball, wherein meter
The step of calculating the displacement and the deformation quantity include:
Connect first reference point and second reference point and form one first reference axis, and connect second reference point and this
Three reference points form one second reference axis, and have one to refer to angle between first reference axis and second reference axis；
It connects the first measurement bright spot and forms a first axle with the second measurement bright spot, and connect the second measurement bright spot and be somebody's turn to do
Third measures bright spot and forms one second axis, and has an angle between the first axle and second axis；
The first axle is calculated relative to the variable quantity of the length of first reference axis and the variable quantity of angle to obtain one
One variable quantity；
Second axis is calculated relative to the variable quantity of the length of second reference axis and the variable quantity of angle to obtain one second
Variable quantity；
It calculates the angle and refers to the variable quantity of angle relative to this to obtain a third variable quantity；And
The deformation quantity is calculated according to first variable quantity, second variable quantity and the third variable quantity.
2. as described in claim 1 identification iris method, it is characterised in that: the multiple tracks incident light be by a light source with
And at least a spectrum groupware is provided, which provides a light, and the light penetrates the spectrum groupware to form the multiple tracks
Incident light.
3. the method for identification iris as claimed in claim 2, it is characterised in that: be the light at the multiple tracks incidence light emitting
By the position of multiple light out of the spectrum groupware.
4. the method for identification iris as described in claim 1, it is characterised in that: the multiple tracks incident light is by least three light
Source is provided, and is the set-down location of at least three light sources at the multiple tracks incidence light emitting.
5. the method for identification iris as described in claim 1, it is characterised in that: before the reference position is faced corresponding to the eyeball
The eye position of side.
6. a kind of method for recognizing iris, wherein when an eyeball is located at a reference position, it is characterised in that the side of the identification iris
Method includes:
Multiple incident light beam strikes are provided to the eyeball；
Set the mark of one first reference point, one second reference point and a third reference point to be located at reference position as eyeball
Note, wherein at the position of first reference point, second reference point and the third reference point and the multiple incident light emitting
Position it is corresponding；
The multiple incident light is bright in one first measurement bright spot of eyeball formation, one second measurement bright spot and third measurement
Point, and the first measurement bright spot, the second measurement bright spot and third measurement bright spot are located near a pupil of the eyeball
Region, wherein this first measurement bright spot, this second measurement bright spot and the third measurement bright spot position and first reference point,
The position of second reference point and the third reference point is corresponding；
An eyeball image of the eyeball is captured, which includes the bright spot and the iris image；
It is bright to obtain the first measurement bright spot, the second measurement bright spot and third measurement to analyze the gray value of the eyeball image
The position of point；And
The spacing of the first measurement bright spot and the second measurement bright spot is calculated relative to first reference point and second ginseng
The variation of the spacing of examination point, and the spacing of the second measurement bright spot and third measurement bright spot is calculated relative to second ginseng
The variation of the spacing of examination point and the third reference point obtains the iris image institute when eyeball is located at the reference position accordingly
The change resolution amount generated.
7. the method for identification iris as claimed in claim 6, it is characterised in that: connect first reference point and second reference
Point forms one first reference axis, and connects second reference point and the third reference point one second reference axis of formation.
8. the method for identification iris as claimed in claim 7, it is characterised in that: connect the first measurement bright spot and second survey
It measures bright spot and forms a first axle, and connect the second measurement bright spot and form one second axis with third measurement bright spot.
9. the method for identification iris as claimed in claim 8, it is characterised in that: obtain the change resolution of the iris image
The step of amount includes:
The first axle is calculated relative to the variable quantity of first reference axis to obtain one first variable quantity；
Second axis is calculated relative to the variable quantity of second reference axis to obtain one second variable quantity；And
The change resolution amount is calculated according to first variable quantity and second variable quantity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910196821.XA CN109919117B (en) | 2013-11-25 | 2013-11-25 | Eyeball detection device and pupil detection method |
| CN201310607136.4A CN104657702B (en) | 2013-11-25 | 2013-11-25 | Eyeball arrangement for detecting, pupil method for detecting and iris discrimination method |
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| CN201310607136.4A CN104657702B (en) | 2013-11-25 | 2013-11-25 | Eyeball arrangement for detecting, pupil method for detecting and iris discrimination method |
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| CN109919117B (en) | 2024-05-03 |
| CN109919117A (en) | 2019-06-21 |
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