CN106037625B - Measuring device for dynamic visual lobe and measuring method thereof - Google Patents
Measuring device for dynamic visual lobe and measuring method thereof Download PDFInfo
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- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/024—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for determining the visual field, e.g. perimeter types
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Abstract
The invention relates to a measuring device for dynamic visual lobe and a measuring method thereof, belonging to the technical field of visual cognition measurement. The device comprises a client computer provided with a display screen, a mouse and a data processor installed therein and a measuring assistant positioning tool. The method comprises the steps of constructing two test figures as a searching interface, enabling a subject to judge a target identification tag in a first figure, recording a judgment result, and determining the visual field boundary point in each axial direction of the first figure; and using the obtained visual field boundary points of all axial directions to draw a visual field shape figure, and storing a measurement result and displaying the same on the display screen. The measuring device has the advantages that the operation cost is low; the operation is convenient; simultaneous online measurement of multiple people can be met; the measuring method is simple and feasible; the measuring requirements of different conditions can be met; and the displayed measurement result has the visual field shape figure and a shape index value, so that the qualitative and quantitative analysis requirements can be met simultaneously.
Description
Technical field
The invention belongs to visual cognition field of measuring technique, more particularly to a kind of dynamic function visual field (Dynamic
Visual Lobe) measurement apparatus and method.
Background technology
The definition in the function visual field (Visual Lobe) is that people to be had found that visual search destination probability is big when single is stared
In or the regional ensemble that constitutes of location point equal to 50%.A.H.S.Chan and D.K.T.So is being published in periodical
The paper Measurement of volume 36 in 2006 of International Journal of Industrial Ergonomics
Propose in and quantification of visual lobe shape characteristics a kind of solidifying based on single
Apparent time is interior to find the search mission duplicate measurements of target identification label obtaining function from a large amount of identical vision distracters
The method of viewing field shape and Shape Indexes, and develop a set of process of measurement VLOMS (static vision field measurement) system.
The search interface that the measuring method that Chan and So is proposed is provided is as shown in Figure 1.Interface includes a series of uniform rows
The symbol of cloth, in addition to 1 different symbol (in figure zero), other all symbols (in figure ×) all it is same-sign,
Used as distracter, 1 different symbol is target identification label.Present to the time (300ms that tester's single is stared in the interface
Left and right, can voluntarily be arranged) disappear afterwards, the position of originally distracter and target identification label is covered by "+".Tester uses mouse point
Hit the "+" of target identification label position；If tester does not see the target identification label in search interface, mouse is used
Punctuate hits the "+" of optional position, and afterwards task terminates, and carries out search mission next time.Next subtask and appointing for being over
Business is identical, but target can appear randomly in interface other positions.Measuring system can record every subtask tester and use mouse point
Whether the target location hit is correct, and judges whether perimetry completes after every subtask terminates.When perimetry is completed,
In the search mission being over, target identification label occurs twice in all positions being likely to occur, that is to say, that for
It is certain before or after the subtask to also have and the only once target identification of search mission for any search mission
Position occurs in label, and position occur with the target of this search mission identical.After measurement process terminates, the method is according to searching every time
Whether the position that the whether correct result of rope task had occurred to all targets judging within sweep of the eye, judgement
Foundation is that, for optional position, twice search mission is once correct above, that is, think the position within sweep of the eye.It is all
The regional ensemble constituted in position within the vision is field range, and provides viewing field shape figure, viewing field shape based on this
Index, including field area, girth, circularity, border smoothness, symmetry etc..
Search interface used by the method is static images, the individual search interface when target is recognized be it is actionless,
Thus the static function visual field can only be measured.In actual production life, most of visual scene is all dynamic scene, for example, drive
Scene, luggage X-ray machine safety check etc..R.F.Yu and A.H.S.Chan is being published in periodical Human Factors and
The paper of the 3rd phase of volume 25 in 2015 of Ergonomics in Manufacturing＆Service Industries
Display movement velocity and dynamic visual search performance are pointed out in dynamic case
Lower visual search characteristic and static case are different, it is therefore necessary to which the dynamic function visual field is measured.
The definition in the dynamic function visual field is：When searchers watches a fixation point at the uniform velocity moving in region of search attentively, makes eyeball
When keeping constant rotation, location point structure of the probability that target identification label searched person in region of search recognizes more than or equal to 50%
Into regional ensemble.Dynamic function visual field measuring tool and method are there is no at present.
The content of the invention
The present invention seeks to the blank to fill up prior art, proposes a kind of dynamic function visual field measuring device and its measurement
Method.Measurement apparatus operating cost proposed by the present invention is low, simple operation, can meet many people online while measurement；Measuring method
It is simple；Tester comes to survey, without the need for other preparations；Measurement parameter can be arranged voluntarily, meet the survey under different situations
Examination is required；The existing viewing field shape figure of measurement result for being given has shape desired value again, can simultaneously meet qualitative and quantitative analysis
Require.
Kinetic perimetry measuring method proposed by the present invention is to allow tester that phase is repeated several times using the measurement apparatus of the present invention
Same dynamic vision identification mission, the position that rear system determines target appearance next time according to recognition result is terminated per subtask,
At the end of all tasks, viewing field shape figure and desired value, including field area, girth, circularity, side are provided according to recognition result
Boundary's smoothness, symmetry, ductility and systematicness etc..
A kind of dynamic function visual field measuring device proposed by the present invention, it is characterised in that the device by be furnished with display screen,
Mouse and inside are provided with the client computer of data processor and measurement auxiliary locating tool is constituted；The positioning instrument is located at
The front of display screen is coaxial with display screen center, keeps not for subtest person head positioning and in test process
Become；Dynamic function perimetry program is previously stored with the data processor, for obtaining the dynamic function visual field of tester
As a result, the mouse is used for tester's input observed information, and the display screen is used for tester's interactive information and shows measurement knot
Really.
Apparatus of the present invention also include multiple stage client computer and measure auxiliary locating tool accordingly, and increase a master
Generator terminal computer, every client computer is provided with web browser, in the data processor in host side computer in advance
Be stored with dynamic function perimetry program；Every client computer is connected respectively by network with host side computer, many
Individual tester carries out dynamic function perimetry using client computer.
The present invention also proposes the method for carrying out dynamic function perimetry using above-mentioned measurement apparatus, it is characterised in that tool
Body is comprised the following steps：
1) two kinds of resolution charts are constructed as search interface：Every kind of figure is constituted by a fixation point and multiple contacts,
The contact is distributed in the multiple concentric circumferences with the fixation point as starting point with a plurality of radial axis, and adjacent two axially
Angle is equal, and the contact spacing on same axial direction is equal；One is arranged to fixation point and each contact and recognizes label, the first test
Figure has three kinds of different identification labels, and respectively fixation point stares the contact selected on label, radial axis
Target labels, and the interference label of remaining contact；Second resolution chart has two kinds of different identification labels, respectively coagulates
The covering label for staring label and all contacts of viewpoint, shows search interface, in the search interface using computer display
Plane coordinate system of the upper foundation with fixation point as origin；Each contact one coordinate value of correspondence；Two kinds of resolution charts and dynamic function
Perimetry program is stored in advance in host side computer；
2) tester is judged the target identification label in the first figure, and records judged result：Specifically include：
The fixation point that the search interface figure 2-1) is shown in display screen is from left to right moved horizontally along x-axis；When this
When the close display screen of point is central, display screen shows the first the graphic searching interface with the fixation point as the center of circle, the figure
Shape simultaneously then continues to move right after the single gaze duration that center Screen reaches setting, and the first figure disappears；Aobvious
In display screen at the first figure disappearance, there is second figure；
2-2) tester clicks on second figure of the target identification label position of the first figure in memory with mouse
The contact of the covering label in shape；
2-3) judge that mouse is clicked on the target identification label the contact whether coordinate of contact position is the first figure and is located
The coordinate of position, and identification or Unidentified judged result are stored in a data processor；
3) according to step 2) determination methods determine visual field boundary point in the first figure on each axial direction；
4) visual field boundary point on all axial directions for obtaining is depicted as into viewing field shape figure to be stored in host side computer
And be displayed in client display screen；Viewing field shape figure shows viewing field shape desired value, including field area, girth, circle
The index such as degree, border smoothness, symmetry, ductility and systematicness；
5) test terminates.
The characteristics of measurement apparatus proposed by the present invention and beneficial effect are：
(1) process of measurement is arranged on host side, and client is not required to install other programs, can be visited using web browser
Ask, it is easy to use.
(2) main frame networking after, any computer that can be networked can serve as client, can many people exist on a large scale
Line is measured simultaneously.
(3) gauger comes to survey, it is not necessary to other preparations.
(4) easy to use, easy left-hand seat, user can use after simple declaration is introduced, without the need for grasping other
Professional knowledge.
(5) every measurement parameter is (when size, spacing, quantity, movement velocity, the display of target identification label and distracter
It is long) can voluntarily arrange, meet the test request under Different Dynamic visual task situation.
(6) the existing viewing field shape figure of measurement result for being given has shape desired value again, can simultaneously meet qualitative and quantitative point
The requirement of analysis.
The characteristics of measuring method proposed by the present invention and beneficial effect are：
(1) measuring principle is simple, it is easy to which operation is implemented.
(2) only need to disclosure satisfy that the computer and display of web browser service requirement, and necessary auxiliary equipment,
Other instruments equipment is not needed.
(3) tester's binocular that the method is used is followed the trail of when the mechanism of the red point of movement can ensure that search mission occurs and tested
Center of vision at red point, ensured the accuracy of measurement result.
(4) measuring method will not allow tester to have uncomfortable reaction, and also its physical and mental health will not be had undesirable effect.
Description of the drawings
Fig. 1 is the search mission interface of existing VLOMS systems.
Fig. 2 is the method overall flow block diagram of the inventive method.
Fig. 3 is the first pictorial diagram of the search interface of the inventive method.
Fig. 4 is second pictorial diagram of search interface of the inventive method.
Fig. 5 is the screen change schematic diagram of identification process in the inventive method.
Fig. 6 is the FB(flow block) that visual field boundary method is determined in the inventive method.
Fig. 7 is the example structure schematic diagram of apparatus of the present invention.
Specific embodiment
A kind of measurement apparatus and its measuring method in dynamic function visual field proposed by the present invention, below in conjunction with the accompanying drawings and specifically
Embodiment further describes as follows.
The measurement apparatus in a kind of dynamic function visual field proposed by the present invention, it is characterised in that the device is by being furnished with display screen
Curtain, mouse and inside are provided with the client computer of data processor and measurement auxiliary locating tool is constituted；The positioning instrument
It is coaxial with display screen center positioned at the front of display screen, keep for subtest person head positioning and in test process
It is constant；Dynamic function perimetry program is previously stored with the data processor, the dynamic function for obtaining tester is regarded
Wild result, the mouse is used for tester and is input into observed information, and the display screen is used for tester's interactive information and shows measurement
As a result.
This device may also include multiple stage client computer and measure auxiliary locating tool accordingly, and increase a main frame
End computer, every client computer is provided with web browser, pacifies in advance in the data processor in host side computer
Dress dynamic function perimetry program (client computer can no longer install the process of measurement)；Every client computer difference
It is connected with host side computer by network, multiple testers carry out dynamic function perimetry using client computer.
A kind of measuring method in dynamic function visual field using above-mentioned measurement apparatus proposed by the present invention, the method its entirety
FB(flow block) is as shown in Fig. 2 specific implementation step is as follows：
1) two kinds of resolution charts are constructed as search interface, two kinds of graphic structures are identical, and label is different, only the first figure
Shape has target identification label；Specifically include：Every kind of figure is constituted by a fixation point and multiple contacts, and the contact is distributed in
In the I concentric circumferences with the fixation point as starting point and on the radial axis of J bars, adjacent two axial angles are equal, same
Contact spacing on axial direction is equal, and I and J is positive integer, 4≤I≤9,10≤J≤20；Fixation point and each contact are arranged
One identification label, the first resolution chart has three kinds of different identification labels, and respectively fixation point stares label, radial
The target labels of the contact selected on axis, and the interference label of all contacts；Second resolution chart has two kinds not
With identification label, respectively fixation point stared label and the covering label of remaining contact, shown using computer display
Search interface, sets up the plane coordinate system with fixation point as origin on the search interface；Each contact one coordinate value of correspondence；Two
Plant resolution chart and dynamic function perimetry program is stored in advance in host side computer；
The first resolution chart in the search interface of the present embodiment is uniformly distributed as shown in figure 3, the contact has 180
In 9 concentric circumferences with fixation point as starting point and a plurality of radial Axis Cross point；With the fixation point as starting point
20 radial axis on, adjacent two axial angles are 18 °；The fixation point is the origin of coordinates, each contact correspondence one
Coordinate value；In the present embodiment, it is that white crosses pitch "×", mesh to stare identification label for solid red circle, disturbance ecology label
Mark distinguishing label is white hollow circle "○"；Second resolution chart as shown in figure 4, there is two kinds of different identification labels, point
Not Wei fixation point cover label for the plus sige "+" that solid circles stare label and remaining contact.
2) tester is judged the target identification label in the first figure, and records judged result, including：
2-1) show that from left to right level is at the uniform velocity moved along x-axis for the fixation point of the search interface figure in display screen；
When the point close display screen central authorities, the first the search interface figure with this as the center of circle is shown, the figure and then
Setting time t (i.e. single gaze duration) that moves right is continued with identical speed, usually 300ms-500ms (the present embodiment
Take 350ms), subsequently the first figure disappears, and (at the t/2 moment, the figure is stared label and is in through center Screen, i.e. fixation point
Display screen center)；There is second figure at display screen disappearance in the first figure, and pattern changing process is such as on screen
Shown in Fig. 5；
2-2) tester clicks on second figure of the target identification label position of the first figure in memory with mouse
The contact of the covering label in shape；
2-3) judge that mouse is clicked on the target identification label the contact whether coordinate of contact position is the first figure and is located
The coordinate of position, and storage is in a data processor to will determine that result (i.e. identification or unidentified)；Contact will be hit in the present embodiment
The coordinate of position is compared with the coordinate of the target identification label contact position of the first figure, if both coordinate value phases
Deng or difference then praise identification less than the half of difference of adjacent two contact coordinates value, otherwise for unidentified.
3) according to step 2) determination methods determine visual field boundary point in the first figure on each axial direction；
If the definition of the visual field boundary point on each axle is：It is that starting point is passed through on the axial ray of the contact with fixation point
The label of all contacts on the inside of the point is all correctly validated (all within sweep of the eye), all contacts on the outside of the contact
Label be not all correctly validated (all outside field range), then the contact is the visual field boundary point on the axial direction.
4) visual field boundary point on all axial directions for obtaining is depicted as into viewing field shape figure to be stored in host side computer
And be displayed in client display screen；Viewing field shape figure shows viewing field shape desired value, including field area, girth, circle
The index such as degree, border smoothness, symmetry, ductility and systematicness；
5) test terminates.
Above-mentioned steps 3) determine that whether a contact in the first figure on each axial direction is the concrete stream of visual field boundary point
Journey, as shown in fig. 6, comprising the following steps：
3-1) randomly choose the location point that one, the first graphic searching interface contact occurs as target identification label, test
Person starts identification, if identification is correct, judge the location point in tester within sweep of the eye, into step 3-2), if known
Mistake, then do not judge the contact as point to be located, into step 3-3)；
3-2) sets target identification label occurs in the contact of adjacent outer of the contact identified on same axial direction, surveys
Examination person is identified again to target identification label, if identification is correct, judges the contact in tester within sweep of the eye；Repeat
Step 3-2), target identification label is moved outwardly to next adjacent outer contact along current axis, continues to test, until setting mesh
Mark distinguishing label occurs in axial one contact of outermost, using the contact as the axle visual field boundary point if identification is correct,
Otherwise 4) contact of the contact adjacent inboard is gone to step as the axle visual field boundary point；If identification mistake, judges the phase
Adjacent points outside is point to be located, into step 3-3)；
3-3) target identification label is repetitively appearing in point to be located position, and tester carries out second identification；If second
Identification is correct, then judge the point to be located in tester within sweep of the eye, return to step 3-2)；If identification mistake, judging should
Point to be located not in tester within sweep of the eye, into step 3-4)；
3-4) sets target identification label edge is currently displaced axially inwardly to the point to be located adjacent inboard contact, tester couple
The contact is recognized twice, if once identification correctly, judges that the contact is the visual field on this axial direction in recognizing twice
Boundary point；If recognizing equal mistake twice, sets target identification label continuation moves inwardly into next adjacent along current axis
Inner side is recognized twice behind contact, until once recognizing that correctly the contact is in the identification twice of identified contact
Visual field boundary point on this axial direction.
Above-mentioned identification process is the identification process to single axial, is actually measured as obtaining more preferable result, is to all
Axially the target identification label of setting intersects identification, rather than each is axially recognized in order.Because if in order identification is surveyed
Examination person just can judge that position occurs in impact point by impact point occurrence law, accordingly even when also can not be given within sweep of the eye just
True judged result.Therefore, adjacent contacts coaxial in above-mentioned identification process are twice on identification process and other axial directions several times
Identification process separates, to ensure that randomness makes judged result more accurately reflect truth.
Measuring method of the present invention can be realized by programming personnel using general programming technique, and be pre-installed in client
In end or host side computer.
The Application Example of the present invention is as follows：A kind of survey for realizing this dynamic function perimetry method proposed by the present invention
Amount device embodiment, its structure as shown in fig. 7, comprises：One host side 1, N number of client 2, N number of measurement aid (this reality
That applies that example is connected using the chin strap of fixed tester's chin and with chin strap grips support) 3, N is positive integer；Institute
State and install in advance in the data processor in host side dynamic function function perimetry method program proposed by the present invention, it is N number of
Client is connected by network with host side, and host side allows M client while online access, and M is positive integer, M≤N；Often
Platform client is independently measured；During measurement, a chin support is installed in each client front, makes tester's head and client
End keeps geo-stationary.
The host side of the present embodiment requires more than 2G internal memories, the computer of more than 2.0GHz dominant frequency.The client is installed
There is the computer of web browser, the process of measurement of host side is accessed by web browser (such as Chrome browsers).
The chin strap bottom has a clamping device to fix on the table, height adjustable.
Need tester by chin strap on chin strap before test, adjustment chin strap height and client distance extremely meet measurement
Require, afterwards tester's login system, configure according to test request and can start after relevant parameter measurement.Measurement terminates rear system
Measurement result can be provided, tester can see, while result can be stored in main frame client database.
The specifically used step of this device is as follows：
(1) client is positioned over into horizontal table top, chin strap is fixed on into desktop edge by clamping device, ask tester
Chin is positioned on chin strap, chin strap height and its relative position with client Display is adjusted, makes tester double
Mesh is 60cm with indicator screen distance, and the horizontal center of vision of tester's binocular is located at test screen central authorities.
(2) client is opened, by the process of measurement of browser access host side, into after program, setting translational speed,
There are the parameters such as position range and preserves with interference label sizes, label spacing, target identification label in target identification label.
(3) measurement task is started until measurement terminates according to process described in measuring method.
(4) program draws viewing field shape figure and provides viewing field shape desired value, including field area, girth, circularity, border
The indexs such as smoothness, symmetry, ductility and systematicness, and measurement result is stored in main frame client database, and be displayed in
On the screen of client.
Claims (4)
1. a kind of dynamic function perimetry method of employing dynamic function visual field measuring device, the device is by being furnished with display screen
Curtain, mouse and inside are provided with the client computer of data processor and measurement auxiliary locating tool is constituted；The positioning instrument
It is coaxial with display screen center positioned at the front of the display screen, for subtest person head positioning and in test process
Keep constant；Dynamic function perimetry program is previously stored with the data processor, for obtaining the dynamic work(of tester
Energy visual field result, the mouse is used for tester and is input into observed information, and the display screen is used for tester's interactive information and shows
Measurement result；
The device also includes multiple stage client computer and measures auxiliary locating tool accordingly, and increases a host side calculating
Machine, every client computer is provided with web browser, is previously stored with the data processor in host side computer dynamic
State function perimetry program；Every client computer is connected respectively by network with host side computer, multiple testers
Dynamic function perimetry is carried out using client computer；
Characterized in that, the method specifically includes following steps：
1) two kinds of resolution charts are constructed as search interface：Every kind of figure is constituted by a fixation point and multiple contacts, and this is touched
Point be distributed in the multiple concentric circumferences with the fixation point as starting point and a plurality of radial axis on, adjacent two axial angles
Equal, the contact spacing on same axial direction is equal；One is arranged to fixation point and each contact and recognizes label, the first resolution chart
Have three kinds of different identification labels, the respectively mesh for staring the contact selected on label, radial axis of fixation point
Mark label, and the interference label of remaining contact；Second resolution chart has two kinds of different identification labels, respectively fixation point
The covering label for staring label and all contacts, using computer display show search interface, build on the search interface
The vertical plane coordinate system with fixation point as origin；Each contact one coordinate value of correspondence；Two kinds of resolution charts and the dynamic function visual field
Process of measurement is stored in advance in host side computer；
2) tester is judged the target identification label in the first figure, and records judged result：Specifically include：
The fixation point that the search interface figure 2-1) is shown in display screen is from left to right moved horizontally along x-axis；When the point connects
During nearly display screen central authorities, display screen shows the first the graphic searching interface with the fixation point as the center of circle, and the figure is simultaneously
Then continue to move right after the single gaze duration that center Screen reaches setting, the first figure disappears；In display screen
In at the first figure disappearance, there is second figure；
During 2-2) tester is clicked on mouse and is remembered on second figure of the target identification label position of the first figure
Covering label contact；
2-3) judge that mouse clicks on the target identification label contact the position whether coordinate of contact position is the first figure
Coordinate, and will identification or Unidentified judged result store in a data processor；
3) according to step 2) determination methods determine visual field boundary point in the first figure on each axial direction；
4) visual field boundary point on all axial directions for obtaining is depicted as into viewing field shape figure to be stored in host side computer and show
Show in client display screen；Viewing field shape figure shows viewing field shape desired value, including field area, girth, circularity, side
Boundary's smoothness, symmetry, ductility and systematicness index；
5) test terminates.
2. method as claimed in claim 1, it is characterised in that the definition of the visual field boundary point is：With fixation point as starting point Jing
The label of all contacts on the inside of the point crossed on the axial ray of the contact is all correctly validated, all on the outside of the contact
The label of contact be not all correctly validated, then the contact is the visual field boundary point on the axial direction.
3. method as claimed in claim 1, it is characterised in that the step 3) determine in the first figure on each axial direction one
Whether contact is visual field boundary point, specifically includes following steps：
The location point that one, the first graphic searching interface contact occurs as target identification label 3-1) is randomly choosed, tester opens
Begin identification, if identification is correct, judge the location point in tester within sweep of the eye, into step 3-2), if identification is wrong
By mistake, then the contact is judged as point to be located, into step 3-3)；
3-2) sets target identification label occurs in the contact of the adjacent outer on same axial direction that the contact identified is located, test
Person is identified again to the target identification label, if identification is correct, judges the contact in tester within sweep of the eye；Repeat
Step 3-2), target identification label is moved outwardly to next adjacent outer contact along current axis, continues to test, and regards until finding
Wild boundary point or sets target identification label occur in axial one contact of outermost, make the contact if identification is correct
For the axle visual field boundary point, otherwise 4) contact of the contact adjacent inboard is gone to step as the axle visual field boundary point；If known
Mistake, then do not judge that the adjacent outer point, as point to be located, completes an identification process, into step 3-3)；
3-3) target identification label is repetitively appearing in point to be located position, and tester carries out second identification process；If second
Identification is correct, then judge the point to be located in tester within sweep of the eye, return to step 3-2)；If identification mistake, judging should
Point to be located not in tester within sweep of the eye, into step 3-4)；
3-4), along the contact for being currently displaced axially inwardly to the point to be located adjacent inboard, tester is to this for sets target identification label
Contact is recognized twice, if once identification correctly, judges the contact as the visual field side on this axial direction in recognizing twice
Boundary's point；If recognizing equal mistake twice, sets target identification label continuation moves inwardly into next adjacent interior along current axis
Side is recognized twice behind contact, until once recognizing that correctly the contact is this in the identification twice of identified contact
Visual field boundary point on axial direction.
4. method as claimed in claim 3, it is characterised in that the step 3) described in adjacent contacts coaxial in identification process
Twice identification process separates with the identification process on other axial directions several times, to ensure that randomness makes judged result more accurately reflect
Truth.
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