CN107638169A - A kind of evaluating method and evaluating system of visual fatigue degree - Google Patents
A kind of evaluating method and evaluating system of visual fatigue degree Download PDFInfo
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Abstract
The invention discloses a kind of evaluating method of visual fatigue degree, including set up children's experimental group, young experimental group, adult experimental group, the beholder of old experimental group；Gather subjects viewing before pupil diameter data and viewing before subjective assessment data；Subjective assessment data after gathering pupil diameter data in viewing when beholder watches four kinds of three-dimensional video-frequencies and watching；Visual fatigue angle value is determined according to subjective assessment data after subjective assessment data before pupil diameter data, viewing in pupil diameter data, viewing before the viewing of each experimental subjects and viewing；The visual fatigue angle value of each experimental subjects is analyzed using statistical analysis technique, forms all ages and classes, different sexes, different parallaxes and personal viewing front-and rear-view fatigue strength analysis.The present invention improves that the individual spreadability of visual fatigue evaluation and test, evaluation and test face are wider, compensate for blank of the visual fatigue degree in the analysis of Influential Factors such as gender differences, age differences, beholder's individual difference.
Description
Technical field
The invention belongs to stereo display technique and visual fatigue degree detection field, in particular to a kind of visual fatigue
The evaluating method and evaluating system of degree.
Background technology
In recent years, stereo display technique is that the mankind bring experience sense on the spot in person.But show compared to conventional planar
Show, viewing stereoscopic display is easier ophthalmodynia, dizzy even nausea and vomiting etc. visual fatigue symptom occur, leads to not see for a long time
See.For the sustainable and stable development of stereo display technique, it is necessary to assure will not have when viewing to the Vision Health of people
Harmful effect, and at least shown with conventional planar and watch comfort level with identical.
Stereos copic viewing visual fatigue may all occur in all age group, each sex, each race, but according to beholder
Race, age, or sex, factor, its stereos copic viewing visual fatigue degree such as eyesight also have larger difference, existing stereos copic viewing
Visual fatigue degree detection method has subjective test and appraisal and objective evaluation two ways, and both modes are all regarding tired mostly to stereos copic viewing
Lao Du influence factor is judged that i.e. influence factor have ignored individual difference only for three-dimensional video-frequency.
The content of the invention
In order to solve the above technical problems, The present invention provides a kind of evaluating method and evaluating system of visual fatigue degree, with
Solve the problems, such as that existing stereos copic viewing visual fatigue degree judgement is not correct enough, ignore individual difference.
To reach above-mentioned technical purpose, the technical solution adopted by the present invention is：A kind of evaluating method of visual fatigue degree is provided,
Comprise the following steps：
S1, subjects are set up, the personnel without eye disease and without binocular visual function distortion are by age divided into children's reality
Test group, young experimental group, adult experimental group, old experimental group, children's experimental group, young experimental group, adult experimental group and
Women occupies default ratio in old experimental group；
Data acquisition before viewing, gather pupil diameter data before the viewing of subjects；And to fill in visual fatigue degree questionnaire
Form collect viewing before subjective assessment data；
Data acquisition in S3, viewing, pupil in the whole viewing gathered during subjects watch four kinds of three-dimensional video-frequencies
Diameter data, the parallax level of four kinds of three-dimensional video-frequencies are different；
Data acquisition after S4, viewing, when often playing a kind of three-dimensional video-frequency, is adopted in the form of filling in visual fatigue degree questionnaire
Subjective assessment data after collection is watched；
S5, according to pupil diameter data, viewing in pupil diameter data, viewing before the viewings of each subjects before
Subjective assessment data determine visual fatigue angle value after subjective assessment data and viewing；
S6, the visual fatigue angle value using each experimental subjects of statistical analysis technique analysis, form all ages and classes visual fatigue
Degree analysis, the analysis of different sexes visual fatigue degree, the analysis of different parallax visual fatigues, personal viewing front-and rear-view fatigue strength analysis.
Meanwhile the invention provides a kind of evaluating system of visual fatigue degree, including vision parameter acquisition module, stereoscopic display
Device, visual fatigue degree subjective assessment module, pupil diameter acquisition module, data analysis module；
The vision parameter acquisition module includes eyesight and examines equipment, examines equipment to carry out experiment beholder by eyesight
Eye examination is to exclude unqualified beholder；
The 3 d display device includes three-dimensional display, and the three-dimensional display is used to play three-dimensional video-frequency；
The visual fatigue degree subjective assessment module is the questionnaire being arranged on smart machine, and the visual fatigue degree is asked
The visual fatigue subjective feeling for gathering beholder before and after three-dimensional video-frequency is watched is rolled up, and the visual fatigue subjective feeling is calculated
For subjective evaluating data；
The pupil diameter acquisition module includes video camera, semi-transparent semi-reflecting lens, graphics processing unit, the semi-transparent semi-reflecting lens
Beholder's drawing axis is erected at, the human eye pupil change that the video camera captured in real-time reflects through the semi-transparent semi-reflecting lens；Institute
State graphics processing unit and the human eye pupil change that the video camera is shot is calculated as pupil diameter data；
The data analysis module is formed not by analysis software statistical analysis subjective assessment data, pupil diameter data
With age visual fatigue degree analyze data, different sexes visual fatigue degree analyze data, different parallax visual fatigue analyze datas, individual conception
See front-and rear-view fatigue strength analyze data.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) present invention provide not only impact analysis method of the three-dimensional video-frequency to visual fatigue degree, also by beholder's
The beholder of four groups of all ages and classes has been set up in screening, and existing male also has women in four groups of all ages and classes beholders, improves
The individual spreadability of visual fatigue evaluation and test, evaluation and test face is wider, compensate for visual fatigue degree in gender differences, age differences, beholder
Blank in the analysis of Influential Factors such as individual difference；It is combined by subjective assessment with pupil diameter data monitoring (objective evaluation)
Mode, improve the accuracy of stereos copic viewing visual fatigue degree.
(2) introduce coefficient of reliability and Reliability Analysis is carried out to the reliability and stability of visual fatigue degree questionnaire, so improve
The reliability and authenticity of subjective evaluation result.
Brief description of the drawings
The accompanying drawing of the present invention is used for providing further understanding of the present application, forms the part of the application, attached at these
Same or analogous part is represented in figure using identical reference number, in the accompanying drawings：
Fig. 1 is the workflow schematic diagram of method of the present invention；
Fig. 2 is the circuit theory schematic diagram of system of the present invention；
Fig. 3 is the structural representation of the pupil diameter acquisition module of system of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with drawings and the specific embodiments, to this
Invention is described in further detail, and schematic description and description of the invention is used to explain the present invention, composition pair
The restriction of the present invention.
As shown in Figure 1 to Figure 3, a kind of evaluating method of visual fatigue degree, comprises the following steps：
S1, subjects are set up, screened by the inspection of eye test instrument without eye disease and abnormal without binocular visual function
The subjects of change 88, by age it is divided into children's experimental group, young experimental group, adult experimental group, old experimental group, Er Tongshi
Test group, young experimental group, adult experimental group and old experimental group in women occupy default ratio；Wherein children organize 22, year
Age scope is 8~16 years old；Younger group 22, the range of age are 17~35 years old；Adult group 22, the range of age are 36~49 years old；
Old age group 22, the range of age 50~75 years old.In the present embodiment, the women in each group accounts for 50%.To make this evaluation and test more accurate
Really, eyesight all reaches more than 0.8 after the eyesight of all beholders or correction, and Stereoacuity is less than 60 ", antimetropia is less than
2.00D and without protanopia anerythrochloropsia.
Data acquisition before S2, viewing, gathers pupil diameter data before the viewing of beholder；And to fill in visual fatigue degree questionnaire
Form collect viewing before subjective assessment data.
Data acquisition in S3, viewing, pupil is straight in the whole viewing gathered during beholder watches four kinds of three-dimensional video-frequencies
Footpath data, in this example, 3 seconds collection pupil diameter data can be spaced and so reached whole collection pupil diameter in watching process
The purpose of data；In this step, the three-dimensional video-frequency of use is made by 3 d modeling software 3DS Max 2010, its parallax water
Flat is respectively 5 ', 20 ', 50 ', 80 '.To improve the reliability of evaluation result, the horizontal three-dimensional video-frequency of different parallaxes is random in four
Play, each three-dimensional video-frequency reproduction time is 2 minutes, and three-dimensional video-frequency is separated with grey screen between any two, and grey screen shows
It is 1 minute to show the time；In this step, three-dimensional video-frequency, and the solid of different groups are watched with the rotation of every group of 4 beholders
Video playback order is different.
Data acquisition after S4, viewing, when often playing a kind of three-dimensional video-frequency, to fill in the shape for seeing backsight fatigue strength questionnaire
Subjective assessment data after formula collection viewing；For the visual fatigue degree of beholder is appreciated more fully, and help beholder's accurate evaluation
The visual fatigue degree of oneself, visual fatigue degree questionnaire include 12 assessment items, as shown in table 1.Each assessment item is provided with 1 to 5
The grading system divided, respectively disagree, partly disagree from 1 to 5, neutrality, partly 5 grades such as agreement, agreement, so sight
The person of seeing possibly can not accurate judgement oneself subjective feeling when, can be evaluated by the form of marking.According to 12
Subjective assessment data of the arithmetic mean of instantaneous value of the overall score of assessment item as every beholder.Beholder is regarded for convenience
Feel degree of fatigue clearly defined the level, according to overall score average be divided into no visual fatigue, slight visual fatigue, moderate visual fatigue,
4 level of fatigue such as serious visual fatigue；The visual fatigue evaluation of estimate of 12 projects of every beholder is carried out to seek arithmetic after adding up
Average value, divide without the overall score average F of visual fatigue span for 1≤F ＜ 2, the overall score of slight visual fatigue is equal
Value F span is that 2≤F ＜ 3 divide, and the overall score average F of moderate visual fatigue span is divided for 3≤F ＜ 4, is seriously regarded
The overall score average F of fatigue span is 4≤F≤5 point.
Table 1
S5, according to main before pupil diameter data in pupil diameter data, viewing before the viewing of each experimental subjects and viewing
Subjective assessment data determine visual fatigue angle value after seeing evaluating data, viewing.Mode is as follows：To each beholder, if logical
It is consistent with the visual fatigue grade that subjective assessment obtains to cross the visual fatigue grade that pupil diameter measurement obtains, then retains the beholder's
Subjective assessment data are as visual fatigue angle value, if the visual fatigue grade obtained by pupil diameter measurement and subjective assessment obtain
The visual fatigue grade arrived is inconsistent, then is finally used as visual fatigue angle value by the use of subjective assessment data.
Wherein, the pupil diameter data that whole process collects when pupil diameter data is watch each three-dimensional video-frequency in viewing
Arithmetic mean of instantaneous value；It can cause the increase of pupil diameter this principle can be by comparing pupil diameter number before viewing according to visual fatigue
According to the visual fatigue degree grade for the foundation pupil diameter data that beholder is drawn with pupil diameter data in viewing, such as：A certain sight
The pupil diameter that the person of seeing Mr. Wang ignores under fatigue state before viewing is 4.2mm, if viewing in Mr. Wang pupil diameter e scope
Then it is no visual fatigue for 4.2mm≤e≤4.4mm；If pupil diameter e scope is 4.4mm ＜ e≤4.6mm, to be slight
Visual fatigue；If pupil diameter e scope is 4.6mm ＜ e≤4.8mm, for moderate visual fatigue；If pupil diameter e 4.8mm with
On, then it is serious visual fatigue；Similarly, the judgment mode of the subjective assessment of Mr. Wang is as follows, such as the subjective assessment before viewing
The overall score average F of data indicates no visual fatigue for 1, and the overall score average F of subjective assessment data is equal to 4.5 after Mr. Wang's viewing
Point, serious visual fatigue is represented, if the pupil diameter e of Mr. Wang is in more than 4.8mm, then it represents that regarded by what pupil diameter measurement obtained
Level of fatigue is consistent with the visual fatigue grade that subjective assessment obtains, and retains the front and rear subjective assessment data of Mr. Wang's viewing and is used as regarding tired
Labor angle value；If pupil diameter e is between 4.4mm ＜ e≤4.6 in the viewing of Mr. Wang, then it represents that is obtained by pupil diameter measurement
Visual fatigue grade and the obtained visual fatigue grade of subjective assessment it is inconsistent, only retain the subjective assessment data after Mr. Wang's viewing and make
For visual fatigue angle value.
S6, the visual fatigue angle value using each experimental subjects of statistical analysis technique analysis, form all ages and classes visual fatigue
Degree analysis, the analysis of different sexes visual fatigue degree, the analysis of different parallax visual fatigues, personal viewing front-and rear-view fatigue strength analysis.Dividing
In analysis, age and the sex factor between subject, parallax be subject intrinsic factor, subjective assessment data and pupil diameter data as because
Variable.
In order to improve the accuracy of subjective assessment and authenticity, statistical analysis technique is used in this step to visual fatigue degree questionnaire
Reliability and stability carry out Reliability Analysis, Reliability Analysis using coefficient of reliability as judgment criteria.The higher table of coefficient of reliability
The internal requirement and reliability of photopic vision fatigue strength questionnaire are higher, and coefficient of reliability of the invention is in 0.8 visual fatigue degree indicated above
Questionnaire has a higher reliability, and subjective assessment is truer.
Wherein, coefficient of reliability is using clone Bach's coefficient (Cronbach's α1), its calculation formula is：
In formula, k1For subjective assessment item number, k in the present embodiment1=12, Si 2For i-th subjective assessment project score
Variance, S2For the variance of visual fatigue degree questionnaire total score.
Wherein, statistical analysis technique carries out Kruskal-Wallis H inspections respectively using SPSS20.0 statistical analysis softwares
Test, Mann-Whitney U examine and Wilcoxon signed rank tests, illustrated one by one below：
It is by calculating children's experimental group, young experimental group, adult experimental group, old age in fact that Kruskal-Wallis H, which are examined,
Test the probability P of the visual fatigue angle value of group1Value judges all ages and classes visual fatigue degree difference；Judged by calculating mean rank order
Virgin experimental group, young experimental group, adult experimental group, the visual fatigue degree of old experimental group height.During this, due to beholder
Comprising 4 kinds of age groups, therefore Kruskal-Wallis H statistics obey the χ that the free degree is 32Distribution, SPSS are counted automatically
Calculate Kruskal-Wallis H statistics and corresponding probability P1Value.Introduce level of significance α, level of significance α=0.05,
By probability P1Value is compared with level of significance α, if probability P1Value is less than level of significance α, then judges all ages and classes visual fatigue
Degree difference is notable.
Kruskal-Wallis H, which upcheck, calculates the probability P of the visual fatigue angle value under different parallax three-dimensional video-frequencies2Value
Judge different parallax visual fatigue degree differences；Judge different parallax visual fatigue degree height by calculating mean rank order；This process
In, because experiment amounts to 4 kinds of parallax levels, therefore Kruskal-Wallis H statistics obey the χ that the free degree is 32Distribution.By
SPSS calculates Kruskal-Wallis H statistics and corresponding probability P2Value.Introduce level of significance α, level of significance α
=0.05；By probability P2Value is compared with level of significance α, if probability P2Value is less than level of significance α, then different parallaxes regard
Degree of fatigue significant difference.
The specific calculation that Kruskal-Wallis H are examined is as follows：Kruskal-Wallis H, which are examined, to be used for examining K
Overall visual fatigue degree whether there is difference where individual independent sample.The calculation formula of H statistics is as follows：
Wherein, K is number of samples, K=4, n in the present embodimentjFor the visual fatigue angle value number in j-th of sample, N is institute
There are the visual fatigue angle value number sum of sample, RjFor the sum of ranks of j-th of sample.Due to K=4 in the present invention, the H statistics are obeyed
The free degree is 3 χ2Distribution.It is 0.05 to set significance, looks into χ2It is distributed tables of critical values, χ2 0.05,3=7.81.If by above-mentioned
The χ that formula calculates2>7.81, then corresponding probability P1Or P2<0.05；If the χ calculated2<7.81, then corresponding probability P1
Or P2>0.05。
Mann-Whitney U use the probability P of the visual fatigue angle value of Z normalized set different sexes beholders3Value peace
Equal rank；Pass through probability P3Value judges different sexes visual fatigue degree difference, judges different sexes visual fatigue by mean rank order
Degree height；During this, two kinds of sexes of men and women of beholder are divided into two groups.Due to being large sample, Mann-Whitney U inspections
Test and use Z statistics.SPSS calculates Z statistics and corresponding probability P automatically3Value.Introduce level of significance α, level of significance α
=0.05；By probability P3Value is compared with level of significance α, if probability P3Value is less than level of significance α, then different sexes regard
Degree of fatigue significant difference.
The specific calculations of Mann-Whitney U are as follows：First by two samples, such as women group (X1, X2..., Xm) and
Male's group (Y1, Y2..., Yn) arranged by the ascending order of visual fatigue degree numerical values recited after mixing, obtain every number each corresponding order
Ri.Secondly, all data X of women experimental group1, X2..., XmOrder add up summation, obtain sum of ranks WX, male's experimental group
In all data Y1, Y2..., YnOrder add up summation, obtain sum of ranks WY.Then, women experimental group (X is calculated1, X2...,
Xm) orders of each data is more than male's experimental group (Y1, Y2..., Yn) each data order number (also referred to as logarithm in the same direction) U1=
WX- 1/2m (m+1), calculate male's experimental group (Y1, Y2..., Yn) orders of each data is more than women experimental group (X1, X2..., Xm)
The number U of the order of each data2=WY-1/2n(n+1).Compare U1And U2Size, take U=min (U1, U2).Under large sample,
Z in this example1Statistic approximation Normal Distribution, calculation formula are：
Wherein, m is the number of women experimental group sample visual fatigue angle value, and n is male's experimental group sample visual fatigue angle value
Number.It is 0.05 to set significance, looks into gaussian distribution table, Z0.05/2=1.96.If calculated by above-mentioned formula | Z |>
1.96, then corresponding probability P3<0.05；If calculate | Z |<1.96, then corresponding probability P3>0.05。
Wilcoxon signed rank tests are tired by the viewing forward sight fatigue angle value and viewing backsight for calculating each experimental subjects
The probability P of labor angle value4Value judges the front and rear visual fatigue degree difference of viewing, passes through visual fatigue journey before and after mean rank order judgement viewing
Degree height.During this, the visual fatigue angle value of all beholders before viewing and after viewing is respectively two of statistical analysis and matched somebody with somebody
To sample.SPSS calculates Z statistics and corresponding probability P automatically4Value.Introduce level of significance α, level of significance α=0.05；
By probability P4Value is compared with level of significance α, if probability P4Value is less than level of significance α, then personal viewing front-and rear-view fatigue
Degree difference is notable.
The calculation of Wilcoxon signed rank tests is as follows：First, respectively with the fatigue of each beholder after viewing
Degree value subtracts corresponding degree of fatigue value before viewing.Secondly, by the ascending volume rank of the absolute value of difference, and according to difference
It is positive and negative add sign to rank, difference is designated as negative sign to be just designated as positive sign, to be negative.If difference is 0, casts out and do not remember；If
The absolute value of difference is equal, then takes the average value of two ranks as its rank.Then, the sum of ranks statistic W of positive sign is obtained+,
The sum of ranks statistic W of negative sign-.Build the Z statistics of approximate Normal Distribution, the calculation formula of Z statistics is in this example：
Wherein, n1To subtract the sample number obtained after the number that viewing front-and rear-view degree of fatigue difference is 0.W=min (W+,
W-).Similarly, P is determined according to standardized normal distribution4Value.
Simultaneously, there is provided a kind of evaluating system of visual fatigue degree, including vision parameter acquisition module, 3 d display device,
Visual fatigue degree subjective assessment module, pupil diameter acquisition module, data analysis module；
Vision parameter acquisition module includes eyesight and examines equipment, examines equipment to carry out ophthalmology to experiment beholder by eyesight
Check to exclude to unqualified beholder；3 d display device includes three-dimensional display, and three-dimensional display is used to play stereopsis
Frequently, beholder is 3 times of stereoscopic display screen height to the distance of stereoscopic display screen；Video fatigue strength subjective assessment module is setting
Questionnaire in cell phone application or computer, visual fatigue degree questionnaire are used to gather beholder before and after three-dimensional video-frequency is watched
Visual fatigue subjective feeling, and visual fatigue subjective feeling is calculated as subjective assessment data；Pupil diameter acquisition module includes shooting
Machine, semi-transparent semi-reflecting lens, graphics processing unit, semi-transparent semi-reflecting lens are erected at beholder's drawing axis, and video camera captured in real-time is through half
The human eye pupil change of saturating semi-reflective mirror reflection；It is straight that the change of human eye pupil that video camera is shot is calculated as pupil by graphics processing unit
Footpath data；Data analysis module forms all ages and classes by analysis software statistical analysis subjective assessment data, pupil diameter data
Before visual fatigue degree analyze data, different sexes visual fatigue degree analyze data, different parallax visual fatigue degree analyze datas, personal viewing
Backsight fatigue strength analyze data.
Wherein, analysis software is SPSS20.0 statistical softwares, and all ages and classes visual fatigue degree analyze data and different parallaxes regard
Analysis of fatigue data carry out Kruskal-Wallis H inspections by SPSS20.0 statistical softwares；Different sexes visual fatigue degree is analyzed
Data carry out Mann-Whitney U inspections by SPSS20.0 statistical softwares；Individual's viewing front-and rear-view fatigue strength analyze data is led to
Cross SPSS20.0 statistical softwares and carry out Wilcoxon signed rank tests.
Wherein, stereoscopic display screen is one kind in following three-dimensional display system：Color separation three-dimensional display, shutter are three-dimensional aobvious
Show device, polarization-type three-dimensional display, grating type three-dimensional display, color separation stereo projection system, shutter stereo projection system, partially
Formula of shaking stereo projection system, grating type three-dimensional optical projection system.
The present embodiment describes more specific and detailed, also gives some advantageous measures of embodiment, still, the implementation
Example and advantageous measure can not be used as limitation of the present invention, when those skilled in the art sees the program, make other
Deformation and the replacement of equivalent arrangements, all should be within protection scope of the present invention.
Claims (10)
1. a kind of evaluating method of visual fatigue degree, it is characterised in that comprise the following steps：
S1, experimental subjects is set up, the subjects without eye disease and without binocular visual function distortion are by age divided into children's reality
Test group, young experimental group, adult experimental group, old experimental group, children's experimental group, young experimental group, adult experimental group and
Women occupies default ratio in old experimental group；
Data acquisition before S2, viewing, gathers pupil diameter data before the viewing of subjects；And to fill in visual fatigue degree questionnaire
Form collects subjective assessment data before viewing；
Data acquisition in S3, viewing, pupil diameter in the whole viewing gathered during subjects watch four kinds of three-dimensional video-frequencies
Data, the parallax level of four kinds of three-dimensional video-frequencies are different；
Data acquisition after S4, viewing, when often playing a kind of three-dimensional video-frequency, is gathered in the form of filling in visual fatigue degree questionnaire
Subjective assessment data after to viewing；
S5, according to subjective before pupil diameter data, viewing in pupil diameter data, viewing before the viewings of each subjects
Subjective assessment data determine visual fatigue angle value after evaluating data and viewing；
S6, the visual fatigue angle value using each experimental subjects of statistical analysis technique analysis, form all ages and classes visual fatigue degree point
Analysis, the analysis of different sexes visual fatigue degree, the analysis of different parallax visual fatigues, personal viewing front-and rear-view fatigue strength analysis.
2. the evaluating method of a kind of visual fatigue degree according to claim 1, it is characterised in that also include adopting in the S6 steps
The step of Reliability Analysis is carried out to the reliability and stability of the visual fatigue degree questionnaire with statistical analysis technique, the reliability point
Analysis uses coefficient of reliability as judgment criteria.
A kind of 3. evaluating method of visual fatigue degree according to claim 1, it is characterised in that statistical analysis side in the S6
Method carries out Kruskal-Wallis H inspections using SPSS20.0 statistical analysis softwares, Mann-Whitney U are examined and
Wilcoxon signed rank tests；
The Kruskal-Wallis H, which upcheck, calculates children's experimental group, young experimental group, adult experimental group, old age
The probability P of the visual fatigue angle value of experimental group1Value judges all ages and classes visual fatigue degree difference；By calculating mean rank order
Judge children's experimental group, young experimental group, adult experimental group, the visual fatigue degree of old experimental group height；
The Kruskal-Wallis H, which upcheck, calculates the probability P of the visual fatigue angle value under different parallax three-dimensional video-frequencies2Value is sentenced
Break different parallax visual fatigue degree differences；Judge different parallax visual fatigue degree height by calculating mean rank order；
The Mann-Whitney U use the probability P of the visual fatigue angle value of Z normalized set different sexes beholders3Value peace
Equal rank, passes through probability P3Value judges different sexes visual fatigue degree difference, judges different sexes visual fatigue by mean rank order
Degree height；
After the viewing forward sight fatigue angle value and viewing of the Wilcoxon signed rank tests by calculating each experimental subjects
The probability P of visual fatigue angle value4Value judges the front and rear visual fatigue degree difference of viewing, judges that viewing front-and rear-view is tired by mean rank order
Labor degree height, and then carry out personal viewing front-and rear-view fatigue strength analysis.
4. the evaluating method of a kind of visual fatigue degree according to claim 1, it is characterised in that four kinds are stood in the S3 steps
Volumetric video plays out according to random fashion, and the playing duration of every kind of three-dimensional video-frequency be 2 minutes, three-dimensional video-frequency between any two between
Grey screen is separated with, a length of 1 minute during the display of the grey screen.
A kind of 5. evaluating method of visual fatigue degree according to claim 1, it is characterised in that the visual fatigue degree questionnaire bag
12 assessment items are included, each assessment item is provided with 1 to 5 point of grading system, the overall score of 12 assessment items
Arithmetic mean of instantaneous value is as subjective assessment data；
Visual fatigue degree grade is divided according to the arithmetic average, the visual fatigue degree grade includes no visual fatigue, slightly regarded
Fatigue, moderate visual fatigue, serious visual fatigue.
6. the evaluating method of a kind of visual fatigue degree according to claim 3, it is characterised in that by the probability P1Value, probability
P2Value, probability P3Value, probability P4Value is respectively compared with level of significance α so as to judging the probability P1Value, probability P2It is worth, is general
Rate P3Value, probability P4Visual fatigue degree difference conspicuousness corresponding to value difference, level of significance α=0.05.
A kind of 7. evaluating method of visual fatigue degree according to claim 2, it is characterised in that the reliability of the Reliability Analysis
Coefficient is using clone Bach's coefficient (Cronbach's α1), its calculation formula is：
In formula, k1For subjective assessment item number, k in the present embodiment1=12, Si 2It is subjective for i-th
The variance of assessment item score, S2For the variance of visual fatigue degree questionnaire total score.
A kind of 8. evaluating method of visual fatigue degree according to claim 3 or 6, it is characterised in that in the S6 in step,
Corresponding probability P is drawn by calculating H statistics1Value and probability P2Value；By calculating Z1Statistic draws corresponding probability P3
Value, by calculating Z2Statistic draws corresponding probability P4Value；
The H statistics pass through formulaIt is calculated, wherein, K is number of samples, this
K=4 in embodiment, njFor the visual fatigue angle value number in j-th of sample, N is the visual fatigue angle value number sum of all samples,
RjFor the sum of ranks of j-th of sample；
The Z1Statistic passes through formulaIt is calculated, in formula, m is women experimental subjects regarding tired
The number of labor angle value, n are the number of male's experimental subjects visual fatigue angle value, and U is that the sum of ranks smaller of two samples of men and women is corresponding
Logarithm in the same direction；
The Z2Statistic passes through formulaIt is calculated, n1To subtract visual fatigue before and after viewing
Degree difference is the sample number obtained after 0 number, and W is the smaller in sum of ranks statistic.
9. a kind of evaluating system of visual fatigue degree, it is characterised in that including vision parameter acquisition module, 3 d display device, regard
Feel fatigue strength subjective assessment module, pupil diameter acquisition module, data analysis module；
The vision parameter acquisition module includes eyesight and examines equipment, examines equipment to carry out ophthalmology to experiment beholder by eyesight
Check to exclude unqualified beholder；
The 3 d display device includes three-dimensional display, and the three-dimensional display is used to play three-dimensional video-frequency；
The visual fatigue degree subjective assessment module is the questionnaire being arranged on smart machine, and the visual fatigue degree questionnaire is used
In visual fatigue subjective feeling of the collection beholder before and after three-dimensional video-frequency watch, and by based on visual fatigue subjective feeling calculating
See evaluating data；
The pupil diameter acquisition module includes video camera, semi-transparent semi-reflecting lens, graphics processing unit, and the semi-transparent semi-reflecting lens are set
Between beholder and the three-dimensional display, human eye pupil that the video camera captured in real-time reflects through the semi-transparent semi-reflecting lens
Change；The human eye pupil change that the video camera is shot is calculated as pupil diameter data by described image processing unit；
The data analysis module forms not the same year by analysis software statistical analysis subjective assessment data, pupil diameter data
Before age visual fatigue degree analyze data, different sexes visual fatigue degree analyze data, different parallax visual fatigue analyze datas, personal viewing
Backsight fatigue strength analyze data.
10. the evaluating system of a kind of visual fatigue degree according to claim 9, it is characterised in that the analysis software is
SPSS20.0 statistical softwares, all ages and classes visual fatigue degree analyze data and different parallax visual fatigue analyze datas pass through described
SPSS20.0 statistical softwares carry out Kruskal-Wallis H inspections；The different sexes visual fatigue degree analyze data passes through described
SPSS20.0 statistical softwares carry out Mann-Whitney U inspections；Individual's viewing front-and rear-view fatigue strength analyze data passes through described
SPSS20.0 statistical softwares carry out Wilcoxon signed rank tests.
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