CN110101363A - The acquisition device of eye fundus image - Google Patents
The acquisition device of eye fundus image Download PDFInfo
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- CN110101363A CN110101363A CN201910399827.7A CN201910399827A CN110101363A CN 110101363 A CN110101363 A CN 110101363A CN 201910399827 A CN201910399827 A CN 201910399827A CN 110101363 A CN110101363 A CN 110101363A
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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
- A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
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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
- A61B3/14—Arrangements specially adapted for eye photography
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Abstract
Present disclose provides a kind of acquisition devices of eye fundus image characterized by comprising acquisition module is used to acquire image, and can shoot eye fundus image by adjusting optical facilities；Contrast module is used to for acquired image being compared with default feature database, identifies and whether there is characteristic image in acquired image；And control module, it is configured as making acquisition module be in off working state when characteristic image is not present in acquired image within a preset time.In the disclosure, by the image that identification acquisition module obtains whether there is with the matched characteristic image in default feature database, make acquisition module when losing photographic subjects in off working state.Thereby, it is possible to reduce the power consumption of the acquisition device of eye fundus image, extend cruise duration.
Description
Technical field
The disclosure is specifically related to a kind of acquisition device of eye fundus image.
Background technique
With popularizing for eyeground screening relevant item, fundus camera is increasingly widely used.In order to meet for example
The eyeground screening of base and remote mountain areas needs, and generally requires using Portable fundus camera.The usual band of Portable fundus camera
Have for the power module for shooting power supply.In Portable fundus camera work, need to operate Portable eye by operator
Bottom camera, and the eyeground of examinee is directed to obtain the eye fundus image of examinee.
However, current fundus camera is often configured to once open, even if examinee is not in the camera lens of fundus camera
Before, fundus camera still can be in running order, and therefore, such Portable fundus camera is easy to cause energy consumption larger or continuation of the journey
Scarce capacity.For example, institute's captured image resolution ratio is higher for some hand-held fundus cameras, pixel is how (such as super
Cross 2,000,000 pixels), therefore, the master chip processing task of fundus camera is heavier, needs full rate processing image and consumes biggish
Power consumption.In addition, the infrared lamp etc. of the floor light configured in fundus camera is also biggish part of consuming energy, as a result lead to eyeground
Camera generally battery power supply is obviously shortened cruise duration.
Summary of the invention
The disclosure made in view of above-mentioned situation, and its purpose is to provide a kind of eye fundus images that can reduce
The power consumption of acquisition device extends the acquisition device of the eye fundus image of cruising ability.
For this purpose, present disclose provides a kind of acquisition devices of eye fundus image characterized by comprising acquisition module is used
In acquisition image, and eye fundus image can be shot by adjusting optical facilities；Contrast module is used for figure collected
As being compared with default feature database, identifies and whether there is characteristic image in acquired image；And control module, matched
It is set to when the characteristic image is not present in acquired image within a preset time, the acquisition module is made to be in inoperative
State.
In the disclosure, acquisition module acquired image is compared contrast module with default feature database, identifies institute
It whether there is characteristic image in the image of acquisition, when characteristic image is not present in acquired image within a preset time, control
Molding block control acquisition module is in off working state.In this case, mould is acquired when acquisition module loses photographic subjects
Block is in off working state.Thereby, it is possible to reduce the power consumption of the acquisition device of eye fundus image, extend cruise duration.
In addition, optionally, the default feature database is face feature database, institute in the acquisition device involved in the disclosure
Stating characteristic image is facial image.In this case, it can identify in acquisition module acquired image with the presence or absence of face
Image.
Further include that the power module of power supply is provided optionally in addition, in the acquisition device involved in the disclosure, when
When the characteristic image is not present in preset time in acquired image, the control module is configured as limiting the power supply
The supply current of module.Thereby, it is possible to reduce the power consumption of the acquisition device of eye fundus image, extend cruise duration.
In addition, optionally, the control module is additionally configured to, when pre- in the acquisition device involved in the disclosure
If calculating the view of the characteristic image and acquired image there are when the characteristic image in acquired image in the time
Ratio；And according to scale of view, determine whether that the acquisition module is made to be in off working state.In this case, can
According to scale of view, the working condition and off working state switching of acquisition module are quickly controlled.
In addition, optionally, the control module is additionally configured in the acquisition device involved in the disclosure, when advising
When the interior scale of view of fixing time is less than regulated proportion, the acquisition module is made to be in off working state.In this case,
When stipulated time internal view ratio is less than regulated proportion, the power consumption of the acquisition device of eye fundus image can reduce, extend continuation of the journey
Time.
In addition, optionally, the control module is additionally configured to, when pre- in the acquisition device involved in the disclosure
If detecting whether the characteristic image is located at acquired image there are when the characteristic image in acquired image in the time
In predetermined detection area in；And when the characteristic image is not located in the predetermined detection area, make the acquisition mould
Block is in off working state.In this case, when characteristic image is not located in predetermined detection area, it can reduce eyeground figure
The power consumption of the acquisition device of picture extends cruise duration.
In addition, optionally, the control module is additionally configured in the acquisition device involved in the disclosure, when being adopted
There are the characteristic images for the image of collection, and the characteristic image is compared with an at least Given Face image；When described
When characteristic image and an at least Given Face image mismatch, the acquisition module is made to be in off working state.At this
In the case of kind, when facial image and Given Face image mismatch, it can reduce the power consumption of the acquisition device of eye fundus image, prolong
Long cruise duration.
In addition, optionally, the default feature database is eyeball feature database, institute in the acquisition device involved in the disclosure
Stating characteristic image is eyeball image.In this case, it can identify in acquisition module acquired image with the presence or absence of eyeball
Image.
In addition, optionally, the control module is additionally configured to, described in the acquisition device involved in the disclosure
Before acquisition module acquires image, the status information of the acquisition module is obtained, and according to the state information, adopted described
Collection module is switched to high-resolution screening-mode or low resolution screening-mode.In such a case, it is possible to according to eye fundus image
Acquisition device need to switch screening-mode, to reduce power consumption, extend cruise duration.
In addition, in the acquisition device involved in the disclosure, optionally, the status information include at least focusing state and
Exposure status, when the status information is focusing state, the control module is configured as the acquisition module being switched to
The low resolution screening-mode.In this case, when acquisition module is in focusing state, it can reduce eye fundus image
The power consumption of acquisition device extends cruise duration.
According to the disclosure, being capable of providing one kind can reduce Energy in use, extend the acquisition of the eye fundus image of cruising ability
Device.
Detailed description of the invention
Fig. 1 is the exemplary stereoscopic schematic diagram of the acquisition device of eye fundus image involved in the disclosure.
Fig. 2 is the right view of the acquisition device of the eye fundus image of Fig. 1.
Fig. 3 is the block diagram of the acquisition device of eye fundus image involved in the example of the disclosure.
Fig. 4 is the structural schematic diagram of the acquisition module of the acquisition device of eye fundus image involved in the example of the disclosure.
Fig. 5 is the schematic diagram of facial image involved in the example of the disclosure.
Fig. 6 is the schematic diagram of eye fundus image involved in the example of the disclosure.
Fig. 7 is the detection container schematic diagram of the acquisition device of the eye fundus image of Fig. 1.
Fig. 8 is the block diagram of the variation 1 of the acquisition device of eye fundus image involved in the example of the disclosure.
Specific embodiment
Hereinafter, explaining the preferred embodiment of the disclosure in detail with reference to attached drawing.In the following description, for identical
Component assign identical symbol, the repetitive description thereof will be omitted.Scheme in addition, attached drawing is only schematical, the mutual ruler of component
Very little shape of ratio or component etc. can be with actual difference.
It should be noted that term " includes " and " having " and their any deformation in the disclosure, such as wrapped
Include or the process, method, system, product or equipment of possessed a series of steps or units are not necessarily limited to be clearly listed that
A little step or units, but may include or with being not clearly listed or for these process, methods, product or equipment
Intrinsic other step or units.
In some processes of the description in the specification and claims of the disclosure and above-mentioned attached drawing, contain according to
Multiple operations that particular order occurs, but it should be clearly understood that these operations can not be what appears in this article suitable according to its
Sequence is executed or is executed parallel, and the serial number of operation is only used for distinguishing each different operation, and serial number itself, which does not represent, appoints
What executes sequence.In addition, these processes may include more or fewer operations, and these operations can execute in order
Or parallel execution.It should be noted that the description such as " first " herein, " second ", is for distinguishing different message, setting
Standby, module etc. does not represent sequencing, does not also limit " first " and " second " and is different type.
Fig. 1 is the exemplary stereoscopic schematic diagram of the acquisition device 1 of eye fundus image involved in the disclosure.Fig. 2 is the eye of Fig. 1
The right view of the acquisition device 1 of base map picture.Fig. 3 is the block diagram of the acquisition device 1 of eye fundus image involved in the example of the disclosure.
(acquisition device 1 of eye fundus image)
This disclosure relates to a kind of acquisition device of eye fundus image (below sometimes referred to as " acquisition device ") 1.Eye fundus image
Acquisition device 1 can acquire image and handle acquired image.By the acquisition device 1 of eye fundus image, can obtain
The target image such as eye fundus image of patient is taken, and acquired image can be handled.In some instances, eyeground
The acquisition device 1 of image can be Portable fundus camera, hand-held fundus camera e.g. shown in FIG. 1.In addition, some
In example, the acquisition device 1 of eye fundus image is also possible to desk-top fundus camera.
In some instances, as shown in Figure 1, Figure 2 and Figure 3, the acquisition device 1 of eye fundus image may include acquisition module
10, contrast module 20, control module 30 and power module 40.In the acquisition device 1 of eye fundus image, acquisition module 10 can be adopted
Image outside collection.Contrast module 20 can identify in 10 acquired image of acquisition module with the presence or absence of characteristic image such as people
Face image (is described later on), and when characteristic image is not present in acquired image within a preset time, control module 30 can be with
Acquisition module 10 is set to be in off working state.In addition, the power module 40 of the acquisition device 1 of eye fundus image can be omitted, by outer
Portion's power supply (such as DC power supply) is directly powered.
Fig. 4 is the structural schematic diagram of the acquisition module 10 of the acquisition device 1 of eye fundus image involved in the example of the disclosure.
In some instances, acquisition module 10 can be used for acquiring image.Acquired image can be by acquisition module 10
Acquisition shoots scene within the vision and is formed.Shooting field range is the spatial dimension for shooting scene Shi Suoneng and taking, certainly
Surely shooting the parameter of field range includes field angle.For the eye fundus image collected of acquisition module 10, field angle for example can be with
It is 30 ° -60 °, preferably 40 ° -50 °.In some instances, the field angle of eye fundus image for example can for 30 °, 35 °, 40 °,
45°,50°,55°,60°.In addition, scene can be finger ring border or scene, including but not limited to landscape, people or other biological.
In some instances, 10 acquired image of acquisition module can be color image (such as RGB image), can also be with
It is gray level image.In some instances, as shown in figure 4, acquisition module 10 may include optical facilities 11 and imaging unit 12.?
When acquiring image, light enters imaging unit 12 via optical facilities 11, and forms image in imaging unit 12 and (adopted
The image of collection).
In some instances, acquired image can be eye fundus image.Human eye can will be come from by optical facilities 11
The reflected light (such as reflected light R1 or reflected light R2) on eyeground focus on imaging unit 12 (referring to fig. 4).Namely pass through light
Learning mechanism 11 can be such that human eye eyeground (especially human eye retina region) images on imaging unit 12.
In some instances, optical facilities 11 can be the optical module being made of lens, diaphragm etc..Wherein, lens can
To change the direction of propagation of optical path (such as reflected light R1 or reflected light R2).Diaphragm can be used to control the size of imaging.
In the disclosure, acquisition module 10 can shoot eye fundus image by adjusting optical facilities 11.That is, in order to clap
Take the photograph clearly eye fundus image, can the optical facilities 11 to acquisition module 10 focus.In some instances, optical facilities 11
Automated optical zoom can be realized by motor.In other examples, optical facilities 11 can be by focusing manually.
Thereby, it is possible to image in human eye eyeground clearly on imaging unit 12.In addition, clearly eye fundus image can be convenient for acquisition dress
1 pair of eye fundus image is set analyze obtaining relatively accurately judging result.
In some instances, imaging unit 12, which can be, is converted to electricity for reflected light (such as reflected light R1 or reflected light R2)
The photosensitive element (being referred to as " imaging sensor ") of signal.Photosensitive element for example can be CMOS or CCD chip.Some
In example, the picture size (i.e. pixel quantity) of imaging unit 12 for example can be 256 × 256,512 × 512,1024 × 1024
Deng.But the example of the disclosure is without being limited thereto, such as or 128 × 128,768 × 768,2048 × 2048 etc..
As shown in figure 4, acquisition module 10 may include lighting unit 13.Lighting unit 13 is capable of providing illumination light.Illumination
The illumination light (such as illumination light L1 or illumination light L2) that unit 13 generates is by the arrival human eye bottom of optical facilities 11 and in human eye
Bottom generates reflected light (such as reflected light R1 or reflected light R2).In fundus imaging, produced after entering human eye due to extraneous light
Raw reflected light is less, therefore, by the way that lighting unit 13 is arranged in acquisition module 10, so as to facilitate acquisition module 10 to catch
Grasp sufficient fundus reflex light.
As described above, illumination is provided due to being frequently necessary to lighting unit 13 in the collection process of eye fundus image, because
This acquisition module 10 is larger to the battery consumption of acquisition device 1.As a result, in the disclosure, such as in acquisition device 1 it is not in work
Make that acquisition device 1 is made to be in standby when state, so as to extend the cruise duration (explained in detail below) of acquisition device 1.
In some instances, lighting unit 13 can have one or more light sources.Wherein, the light source of lighting unit 13 can
To use white light source, infrared light supply can also be used, white light source and red-light source can also be used simultaneously.In this embodiment party
In formula, the wave-length coverage for the light that the white light source of lighting unit 13 issues can be 390nm~760nm, and infrared light supply issues
The wavelength of light can be 780nm.
In some instances, the light source of lighting unit 13 can use annular light source.It is more uniform thereby, it is possible to provide
Illumination light.
In some instances, acquisition module 10 may include positioning unit (not shown).Positioning unit can be in capture eye
Base map as when multiple sighting target points are provided, by making one the different sighting target point of eye fixation, acquisition module 10 can obtain eyeground not
With the image in region.
In some instances, acquisition device 1 (such as hand-held fundus camera shown in FIG. 1) is used in doctor or nurse
When acquiring eye fundus image to patient, acquisition device 1 is directed to the eyes of patient, adjusts acquisition device 1 at a distance from human eye to setting
Then set a distance range focuses to acquisition device 1, press shutter after the completion of focusing and shot.In exposure moment, acquisition
The lighting unit 13 of module 10 provides illumination light (such as illumination light L1 or illumination light L2) and enters the intraocular of patient, and at human eye bottom
Portion forms reflected light (such as reflected light R1 or reflected light R2).Reflected light (such as reflected light R1 or reflected light R2) passes through optics machine
Structure 11 reaches imaging unit 12, and forms eye fundus image in imaging unit 12.
In some instances, in the case where in acquisition module 10 including positioning unit, patient can be by doctor or shield
Different sighting target points is watched in the guidance of scholar attentively by taking lens, in order to which doctor or nurse focus to acquisition device 1, and
The eye fundus image of different zones is obtained convenient for doctor or nurse.
In other examples, pass through 10 continuous collecting image of acquisition module.In 10 continuous collecting image of acquisition module,
Then think that acquisition module 10 is in running order, in other words, the acquisition device 1 of eye fundus image is in running order.
In some instances, acquisition module 10 provides power supply by power module 40 (being described later on).Specifically, acquisition mould
The imaging unit 12 of block 10 needs supply current to complete reflected light (such as reflected light R1 or reflected light R2) to electric signal and turn
Change.The lighting unit 13 of acquisition module 10 needs supply current to generate illumination light (such as illumination light L1 or illumination light L2).Separately
Outside, the positioning unit of acquisition module 10 is also required to supply current to generate sighting target point.When the supply current of power module 40 is limited
When making or being turned off, 13 lighting-off of lighting unit, and acquisition module 10 stops acquisition or storage acquired image, namely adopts
Collection module 10 is in off working state, such as standby mode or off-mode.Thereby, it is possible to reduce the acquisition device of eye fundus image
1 power consumption extends cruise duration.
In some instances, acquisition module 10 may be under different working conditions (focusing state and exposure status).
The status information of acquisition module 10 can be directly transferred to control module 30 (being described later on) in order to which the control of control module 30 is adopted
Collect module 10 and carries out pattern switching.The mode of the acquisition device 1 of eye fundus image may include low resolution screening-mode and high score
Resolution screening-mode.Wherein, under high-resolution screening-mode, the picture quality that acquisition module 10 acquires is higher, eye fundus image
The computational load of acquisition device 1 is larger and power consumption is larger.Under low resolution screening-mode, the picture quality of the acquisition of acquisition module 10
Lower, the computational load of the acquisition device 1 of eye fundus image is smaller and power consumption is smaller.
(contrast module 20)
Fig. 5 is the schematic diagram of facial image involved in the example of the disclosure.Fig. 6 is eye involved in the example of the disclosure
The schematic diagram of base map picture.Fig. 7 is the detection container schematic diagram of the acquisition device 1 of the eye fundus image of Fig. 1.
In some instances, contrast module 20 can be used for for acquired image being compared with default feature database, know
It whether there is characteristic image in other acquired image.Contrast module 20 can generate existing characteristics image in acquired image
Or two kinds of recognition results of characteristic image are not present in acquired image.
In some instances, default feature database can be the feature database of the characteristic information including preset characteristic image.In advance
If can store the feature templates for identification feature image in feature database.Feature templates may include the feature of characteristic image
Information.Matching, the phase of available acquired image and feature templates are compared with feature templates for acquired image
Like degree.When acquired image and the similarity of feature templates are more than the first given threshold H1, then contrast module 20 can be assumed that
Existing characteristics image in acquired image.It is set inside the acquisition device 1 of eye fundus image in addition, the first given threshold H1 can be
The fixed threshold set is also possible to artificial adjustable.
In some instances, default feature database can be face feature database, and characteristic image can be facial image.Such as it is special
Levying image can be face F shown in fig. 5.Wherein, face characteristic library can be include preset facial image feature letter
The feature database of breath.The characteristic information of facial image for example may include the key point information of face F shown in fig. 5.Key point letter
Breath is such as can be face mask information, eyes (such as eyes f1 or eyes f2).Contrast module 20 can be used for be acquired
Image be compared with face characteristic library, identify acquired image in whether there is facial image.In this case, energy
Enough identifying whether there is facial image in 10 acquired image of acquisition module.For example, after hand-held fundus camera acquisition image,
Contrast module 20 can be compared, be identified in acquired image with the presence or absence of facial image.
In other examples, default feature database can be eyeball feature database, characteristic image can for eyeball image (referring to
Fig. 6).Wherein, eyeball feature database can be include preset eyeball image characteristic information feature database.Contrast module 20 can
To identify and whether there is eyeball image in acquired image for acquired image to be compared with eyeball feature database.
In this case, it can identify in 10 acquired image of acquisition module with the presence or absence of eyeball image.For example, hand-held eyeground
After camera acquires image, contrast module 20 can be compared, be identified in acquired image with the presence or absence of eyeball image.
In some instances, contrast module 20 for example can be digital processing chip (DSP), CPU, specific integrated circuit core
Piece, fpga chip etc..In some instances, contrast module 20 provides power supply by power module 40 (being described later on).When power supply electricity
When stream is limited or is turned off, stopping is compared and is known to acquired image by contrast module 20 (such as fpga chip)
Not, thus, it is possible to further decrease the power consumption of the acquisition device 1 of eye fundus image, extend cruise duration.
(control module 30)
In some instances, control module 30 can receive the recognition result from contrast module 20.In some instances,
Control module 30 can be configured as, and when characteristic image is not present in acquired image in preset time T 1, make to acquire
Module 10 is in off working state.Wherein, preset time T 1 can be the fixation being arranged inside the acquisition device 1 of eye fundus image
Value.Such as preset time T 1 can be 1 minute, 2 minutes or 3 minutes or more.But the example of the disclosure is without being limited thereto, presets
Time T1 can be preset according to the different use habit of user.For example, preset time T 1 can be set to 30 seconds, 1 point
Clock, 10 minutes or more.
In some instances, when characteristic image is not present in acquired image in preset time T 1, explanation is taken
Target (such as the object for being capable of forming characteristic image) has been moved off the region of the capture of acquisition module 10.In this case, make
Acquisition module 10 is in off working state.In some instances, supply current needed for off working state can be module is limited
The case where system or shutdown.
In addition, in some instances, control module 30 can be additionally configured to, when figure collected in preset time T 1
As in when existing characteristics image, the scale of view of characteristic image and acquired image is calculated.Scale of view can be pixel
Ratio.Specifically, after control module 30 obtains characteristic image, the pixel of statistical nature image, and count and adopted
Then the pixel of the image of collection calculates accounting of the pixel of characteristic image in the pixel of acquired image.This public affairs
The example opened is without being limited thereto, and scale of view can also be area ratio.
In some instances, control module 30 according to scale of view can determine whether that acquisition module 10 is made to be in non-work
Make state.In this case, the gradual change trend of scale of view can determine the acquisition module 10 of the acquisition device 1 of eye fundus image
It is whether in running order.Thereby, it is possible to quickly control the working condition and inoperative shape of acquisition module 10 according to scale of view
State switching.Gradual change trend can be the gradual change trend of the ratio of pixel.
In addition, in some instances, control module 30 can be additionally configured to, when small in stipulated time T2 internal view ratio
When regulated proportion, acquisition module 10 is made to be in off working state.In this case, when stipulated time T2 internal view ratio is small
When regulated proportion, the power consumption of the acquisition device 1 of eye fundus image can reduce, extend cruise duration.Regulated proportion can be eye
The fixed value being arranged inside the acquisition device 1 of base map picture.But the example of the disclosure it is without being limited thereto, it is specified that ratio can by user into
Row setting.Stipulated time T2 can be the fixed value being arranged inside the acquisition device 1 of eye fundus image.Such as stipulated time T2 can be with
It is 1 minute, 2 minutes, 3 minutes or 5 minutes or more.But the example of the disclosure is without being limited thereto, it is specified that time T2 can basis
The different use habit of user is configured.For example, stipulated time T2 can be set to 30 seconds, 1 minute, 2 minutes, 5 minutes
Or 10 minutes or more.
In some instances, the accounting when the pixel value of characteristic image in the pixel value of acquired image is providing
In time T2 in reduction trend and when being less than regulated proportion, whole process may indicate that target far from camera lens or target from
Open lens coverage.In such a case, it is possible to which the acquisition module 10 for rapidly controlling the acquisition device 1 of eye fundus image is in
Off working state extends the cruise duration of the acquisition device 1 of eye fundus image to reduce power consumption.The acquisition dress of eye fundus image as a result,
Setting 1 being capable of the quickly working condition of control acquisition module 10 and the off working state switching of the variation based on scale of view.
In addition, in some instances, control module 30 can be configured as, when the acquired image in preset time T 1
When middle existing characteristics image, whether detection characteristic image is located in the predetermined detection area in acquired image.For example, eyeground
The acquisition device 1 of image can be hand-held fundus camera.1 acquired image of acquisition device can be presented on hand-held eyeground
On the display screen of camera.Predetermined detection area in 1 acquired image of acquisition device can be detection zone as shown in Figure 7
A.Detection zone A can be some or all of display screen region.
As shown in fig. 7, under conditions of characteristic image is facial image, when the face of patient is moved to hand-held eyeground phase
In the detection zone A of machine, and the edge of face edge and detection zone A substantially coincide or when in detection zone A, then feature
Image is located in the predetermined detection area in acquired image.If the face of patient is free in always the periphery of detection zone A
Or ratio is too small, and when face is not moved in detection zone A by patient whithin a period of time yet, control module 30 can be with
Acquisition module 10 is set to be in off working state.
In addition, in some instances, control module 30 can be configured as, when characteristic image is not located at predetermined detection area
When interior, acquisition module 10 is made to be in off working state.In this case, when characteristic image is not located in predetermined detection area
When, it can reduce the power consumption of the acquisition device 1 of eye fundus image, extend cruise duration.
In some instances, control module 30 can be configured as, and whether the characteristic image for both having detected user is located at detection
In region, while whether the ratio for detecting characteristic image and detection zone is suitable.
In addition, in some instances, when default feature database can be face feature database, when characteristic image is facial image,
Control module 30 can be configured as, when the existing characteristics image in acquired image in preset time T 1, by characteristic pattern
As being compared with an at least Given Face image.Wherein, control module 30 may include Given Face feature database.Control mould
Block 30 can whether there is an at least Given Face image by Given Face feature database identification feature image.
In some instances, Given Face feature database can be the characteristic information including at least one Given Face image
Feature database.It can store the feature templates of Given Face image for identification in Given Face feature database.Feature templates can be with
Characteristic information including Given Face image.Matching, available characteristic image are compared with feature templates for characteristic image
With the similarity of feature templates.When the similarity of characteristic image and feature templates is more than the second given threshold H2, control module
30 it can be assumed that have an at least Given Face image in characteristic image.
In some instances, when characteristic image be not present an at least Given Face image when, namely when characteristic image with
When at least a Given Face image mismatches, control module 30 can make acquisition module 10 be in off working state.This
In the case of, when facial image and Given Face image mismatch, it can reduce the power consumption of the acquisition device 1 of eye fundus image, prolong
Long cruise duration.
In this case, when characteristic image can be compared with an at least Given Face image for control module 30
When, the acquisition device 1 of eye fundus image can be applied to face authentication field.The acquisition device 1 of eye fundus image can be to setting as a result,
Fixed one or limited specified permission user open.In some instances, control module 30 being capable of automatic comparison feature
Image and Given Face image.In other examples, control module 30 can be after obtaining facial image identification control instruction
Compare characteristic image and Given Face image.Control instruction, which can be, passes through click, touch or voice sending by user.
In some instances, Given Face image can be formed by the following method, it can the face prestored from needs
In find datum mark, extract a face figure, enable similarity between the diagram and existing face beam figure maximum.By bullet
Property figure matching after, new face beam figure will be extracted, and become Given Face image.The Given Face image used as
Feature is identified, and calculates all phases between the face in test feature image and existing pre-stored Given Face image
Like degree, the identity of the maximum face of similarity is to test the identity of face, passes through recognition of face identification.
In other examples, as shown in figure 3, control module 30 can receive from the state letter than acquisition module 10
Breath.Based on the status information of acquisition module 10, control module 30 can control acquisition module 10 and carry out pattern switching.For changing
It, control module 30 can be configured as, and before acquisition module 10 acquires image, obtain the status information of acquisition module 10.
Acquisition module 10 can be switched to high-resolution screening-mode or low resolution shoots mould by control module 30 according to status information
Formula.In such a case, it is possible to need to switch screening-mode according to the acquisition device 1 of eye fundus image, to reduce power consumption, extend
Cruise duration.
In addition, in some instances, status information can include at least focusing state and exposure status.When status information is
When focusing state, control module 30, which can be configured as, is switched to low resolution screening-mode for acquisition module 10.In this feelings
Under condition, it when acquisition module 10 is in focusing state, can reduce the power consumption of the acquisition device 1 of eye fundus image, extend cruise duration.
When status information is exposure status, control module 30, which can be configured as, is switched to high-resolution shooting mould for acquisition module 10
Formula.In such a case, it is possible to obtain the picture of high quality.As a result, in different status information or different shooting qualities
Under demand environment, reasonably switch two different screening-modes, can reduce energy consumption, extends the acquisition device 1 of eye fundus image
Cruise duration.
In some instances, control module 30 for example can be the processing chip of hand-held fundus camera shown in FIG. 1.Control
Molding block 30 for example can be digital processing chip (DSP).In some instances, control module 30 by power module 40 (later
Description) power supply is provided.
In some instances, control module 30 can export control signal to power module 40 based on recognition result, with reality
Now to the control of the supply current of acquisition module 10 or contrast module 20.In other words, control module 30 can be based on identification knot
Fruit controls the working condition of acquisition module 10 or contrast module 20.
(power module 40)
In some instances, power module 40 may include storage power (such as battery) and for connecting storage power
With the supply current delivery circuit of other modules.In some instances, as shown in figure 3, power module 40 can provide power supply.Tool
For body, power module 40 can provide supply current to acquisition module 10, contrast module 20 and control module 30 respectively.
In some instances, when characteristic image is not present in acquired image in preset time T 1, control module
30 can be configured as the supply current of limitation or power cutoff module 40.In other words, when collected in preset time T 1
In image be not present characteristic image when, power module 40 receive control module 30 send control signal, and be decreased or turned off to
The supply current that acquisition module 10 or contrast module 20 convey.Thereby, it is possible to reduce the power consumption of the acquisition device 1 of eye fundus image,
Extend cruise duration.
In some instances, the acquisition device 1 of eye fundus image can also be free of power module 40.At this point, acquisition module 10,
Supply current needed for contrast module 20 and control module 30 can directly be powered by external power supply.In this case, eyeground
The acquisition device 1 of image may include the supply current delivery circuit for connecting external power supply Yu other modules.It controls as a result,
Module 30 can limit or turn off 20 institute of acquisition module 10 or contrast module by controlling corresponding supply current delivery circuit
The supply current needed.
(monitoring module 50)
Fig. 8 is the block diagram of the variation 1 of the acquisition device 1 of eye fundus image involved in the example of the disclosure.
In some instances, as shown in figure 8, the acquisition device 1 of eye fundus image may include monitoring module 50.Monitor module
User voice signal in 50 available ambient enviroments.
In some instances, when monitoring module 50 monitors user voice signal, control module 30 can guarantee to acquire
Module 10 is in running order.Do not monitor that user voice signal, control module 30 can be according to above-mentioned when monitoring module 50
Judgement under example is to 40 input control signal of power module, to determine that acquisition module 10 is in running order or inoperative shape
State.
In some instances, it when control module 30 makes acquisition module 10 be in off working state, is supervised if monitoring module 50
User voice signal is measured, then control module 30 can be such that acquisition module 10 restores from off working state to working condition.Control
Molding block 30 can make power module 40 restore the supply current to acquisition module 10 to 40 input control signal of power module.
In this case, the confined supply current of power module 40 restores normal.
In some instances, monitoring module 50 may include sound transducer and analog-to-digital conversion device.If monitoring module 50 to supervise
User voice signal is measured, then the sound received can be converted to electric signal by sound transducer, then input electric signal
Digital audio signal is obtained in analog-to-digital conversion device.Digital audio signal is input to control module 30, and then keeps power module 40 extensive
The multiple supply current to acquisition module 10 or contrast module 20.
In other examples, when the acquisition device 1 that user needs to continue to use eye fundus image acquires image, Ke Yitong
Crossing artificial mode restores the acquisition device 1 of eye fundus image to working condition from off working state (such as standby mode).Here,
Artificial mode may include touching the operation such as 1 display screen of acquisition device or regulation button of eye fundus image.
Although above combine drawings and embodiments the disclosure is illustrated, it will be appreciated that on state
It is bright not limit the disclosure in any form.Those skilled in the art are without departing from the connotation and range of the disclosure
It can according to need and the disclosure is deformed and is changed, these deformations and variation are each fallen in the scope of the present disclosure.
Claims (10)
1. a kind of acquisition device of eye fundus image, which is characterized in that
Include:
Acquisition module, be used to acquire image, and can shoot eye fundus image by adjusting optical facilities；
Contrast module is used to for acquired image being compared with default feature database, identify acquired image in whether
Existing characteristics image；And
Control module is configured as making institute when the characteristic image is not present in acquired image within a preset time
It states acquisition module and is in off working state.
2. acquisition device according to claim 1, which is characterized in that
The default feature database is face feature database, and the characteristic image is facial image.
3. acquisition device according to claim 1, which is characterized in that
It further include that the power module of power supply is provided, when there is no the characteristic images in acquired image within a preset time
When, the control module is configured as limiting the supply current of the power module.
4. acquisition device according to claim 1 or 2, which is characterized in that
The control module is additionally configured to, when in acquired image within a preset time there are when the characteristic image, meter
The scale of view of the characteristic image and acquired image is calculated, and according to scale of view, determines whether to make the acquisition mould
Block is in off working state.
5. acquisition device according to claim 4, which is characterized in that
The control module is additionally configured to, and when the scale of view is less than regulated proportion at the appointed time, makes described adopt
Collection module is in off working state.
6. acquisition device according to claim 1 or 2, which is characterized in that
The control module is additionally configured to, when in acquired image within a preset time there are when the characteristic image, inspection
It surveys in the predetermined detection area whether characteristic image is located in acquired image, and when the characteristic image is not located at
When in the predetermined detection area, the acquisition module is made to be in off working state.
7. acquisition device according to claim 2, which is characterized in that
The control module is additionally configured to, when there are the characteristic images for acquired image, by the characteristic image and extremely
A few Given Face image is compared；When the characteristic image and an at least Given Face image mismatch,
The acquisition module is set to be in off working state.
8. acquisition device according to claim 1, which is characterized in that
The default feature database is eyeball feature database, and the characteristic image is eyeball image.
9. acquisition device according to claim 1, which is characterized in that
The control module is additionally configured to, and before the acquisition module acquires image, obtains the state of the acquisition module
Information, and according to the state information, the acquisition module is switched to high-resolution screening-mode or low resolution is shot
Mode.
10. acquisition device according to claim 9, which is characterized in that
The status information includes at least focusing state and exposure status, when the status information is focusing state, the control
Molding block is configured as the acquisition module being switched to the low resolution screening-mode.
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