CN107545754A - A kind of acquisition methods and device of road signs information threshold value - Google Patents
A kind of acquisition methods and device of road signs information threshold value Download PDFInfo
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- CN107545754A CN107545754A CN201710587388.3A CN201710587388A CN107545754A CN 107545754 A CN107545754 A CN 107545754A CN 201710587388 A CN201710587388 A CN 201710587388A CN 107545754 A CN107545754 A CN 107545754A
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Abstract
The embodiments of the invention provide a kind of acquisition methods and device of road signs information threshold value, methods described includes：Obtain regarding when experimenter drives and recognize time threshold, and the experimenter to each piece of traffic sign in the combination of different traffic signs depending on recognizing the time；According to described depending on recognizing the time and described depending on recognizing time threshold, obtain and meet the maximum target traffic sign combination for regarding and recognizing condition；Depending on recognizing the time according to corresponding to each piece of traffic sign in target traffic sign combination, information threshold model is built, road signs information threshold value is obtained according to described information threshold model.The system is used to perform the above method.The embodiment of the present invention considered driver in driving procedure to traffic sign depending on the ability of recognizing, and different traffic sign combinations are considered to influence of the driver depending on recognizing traffic sign, the accuracy of transport information threshold value acquisition is improved, is further set in the road for traffic sign and accurate theoretical foundation is provided.
Description
Technical field
The present embodiments relate to technical field of traffic transportation, and in particular to a kind of acquisition side of road signs information threshold value
Method and device.
Background technology
With the development of science and technology, automobile increasingly becomes the necessity in people's life, increasing people uses automobile
As walking-replacing tool, people are guided correctly to drive with regard to the more rational traffic rules of needs, traffic sign accordingly.
The reasonable setting of traffic sign on road, accurately can instruct human pilot to be exercised on road, reduction is driven
Sail human users' error rate.When carrying out the graphic designs of the setting of road signs and traffic sign, it is necessary to be handed over
The research of logical flag information threshold value.Letter traffic sign breath threshold value is also known as road signs information overloading threshold, refers to that driver exists
The value of the maximum information content obtained in the limited time, i.e. driver can obtain maximum within the limited time
Road signs information number or be interpreted as driver can be depending on the number for the most traffic signs recognized within the limited time.It is existing
In technology, the acquisition methods of road signs information threshold value, mainly by research with the increase of road signs information number, during depending on recognizing
Between also linearly increase, when linear mutation, corresponding Information Number be information threshold, and the method is referred to as being mutated depending on recognizing the time
Method.The realization of this kind of method is only applicable to the static experiment depending on recognizing traffic sign, and more accurate for data demand, no
Then, linear relationship can not be formed.This method is excessively single, only by Information Number with pushing over information threshold depending on recognizing the linear relationship of time
Value, and this method is only applicable to the research of static traffic flag information threshold value.And in actual life, the judgement of information threshold is
Drive to judge with reference to dynamic, the accuracy that road signs information threshold value obtains can be to setting of the traffic sign on road
Impact.
Therefore, a kind of scheme how is proposed, it is possible to increase the accuracy that road signs information threshold value obtains, be further friendship
Logical mark is set in the road provides accurate theoretical foundation, turns into urgent problem to be solved.
The content of the invention
For in the prior art the defects of, the embodiment of the present invention provide and a kind of acquisition methods of road signs information threshold value
And device.
On the one hand, the embodiment of the present invention provides a kind of acquisition methods of road signs information threshold value, including：
Obtain regarding when experimenter drives and recognize time threshold, and the experimenter is to every in the combination of different traffic signs
One piece of traffic sign depending on recognizing the time；
According to described depending on recognizing the time and described depending on recognizing time threshold, obtain and meet the maximum target traffic sign depending on recognizing condition
Combination；
Depending on recognizing the time according to corresponding to each piece of traffic sign in target traffic sign combination, information threshold is built
It is worth model, road signs information threshold value is obtained according to described information threshold model.
Further, obtain depending on recognizing the time and described depending on recognizing time threshold described in the basis and meet maximum depending on recognizing condition
Target traffic sign combination, including：
According to described depending on recognizing the time, obtain corresponding to all traffic sign combinations depending on recognizing temporal summation；
Traffic sign quantity identical traffic sign is combined, combined as same class traffic sign, builds traffic combination
Array, Mi=[m1 m2...mj] is designated as, i represents the quantity of traffic sign in the traffic combination array, and mj represents the friendship
J-th of traffic sign combination, i in logical combination array>1, j>1；
It is if described little depending on recognizing temporal summation corresponding to the combination of all traffic signs in the traffic sign array Mi
In described depending on recognizing time threshold, and in the presence of described depending on recognizing the time corresponding to a traffic sign combination in traffic sign array Mi+1
Summation depending on recognizing time threshold, then combines each traffic sign in the traffic sign array Mi as the target more than described
Traffic sign combines.
Further, when described in the combination according to the target traffic sign corresponding to each piece of traffic sign depending on recognizing
Between, information threshold model is built, including：
Depending on recognizing the time according to corresponding to each piece of traffic sign in target traffic sign combination, structure polynary one
Equation of n th order n group, the quantity of the unknown quantity of the multi head linear equation group are the number of traffic sign in target traffic sign combination
Amount；
Using the multi head linear equation group as described information threshold model.
Further, methods described also includes：
In being combined according to the experimenter of different driving ages to the target traffic sign each piece of traffic sign depending on recognizing the time,
Determine the coefficient of unknown quantity described in the multi head linear equation group.
Further, it is described that road signs information threshold value is obtained according to described information threshold model, including：
The value of each unknown quantity is obtained according to the multi head linear equation group, minimum unknown quantity will be worth as benchmark not
The amount of knowing；
The value of the benchmark unknown quantity is normalized, and by the target traffic sign combine in each unknown quantity
Value and the benchmark unknown quantity value between value of the ratio as each unknown quantity；
Using the value of each unknown quantity in the multi head linear equation and as the road signs information threshold value.
Further, it is described obtain when experimenter drives depending on recognizing time threshold, including：
According to the distance of visual cognition and drive speed of each experimenter, the average distance of visual cognition of the multiple experimenters of acquisition
With average drive speed, the ratio of the average distance of visual cognition and average drive speed is used as described depending on recognizing time threshold.
Further, it is described obtain experimenter to different traffic signs combine in each piece of traffic sign depending on recognizing when
Between, including：
Experiment video of each experimenter depending on recognizing traffic sign is recorded by eye tracker；
According to the experiment video, the experimenter is obtained to each piece of traffic sign in the combination of different traffic signs
Depending on recognizing the time started and depending on recognizing the end time, by it is described depending on recognize the end time and it is described depending on recognize the time difference between the time started make
To be described depending on recognizing the time.
On the other hand, the embodiment of the present invention provides the acquisition device of road signs information threshold value, including：
Depending on recognizing time acquisition unit, for obtain experimenter drive when depending on recognizing time threshold, and the experimenter couple
Each piece of traffic sign in the combination of different traffic signs depending on recognizing the time；
Traffic sign combines acquiring unit, for recognizing the time and described regard recognizes time threshold, acquisition satisfaction according to described regard
The maximum target traffic sign depending on recognizing condition combines；
Information threshold acquiring unit, for institute corresponding to each piece of traffic sign in being combined according to the target traffic sign
State depending on recognizing the time, build information threshold model, road signs information threshold value is obtained according to described information threshold model.
Another further aspect, the embodiment of the present invention provide the electronic equipment of the acquisition for road signs information threshold value, including：
At least one processor；And
At least one memory being connected with the processor communication, wherein：
The memory storage has and by the programmed instruction of the computing device, the processor described program can be called to refer to
Order is able to carry out the acquisition methods of above-mentioned road signs information threshold value.
Another aspect, the embodiment of the present invention provide a kind of non-transient computer readable storage medium storing program for executing, it is characterised in that described
Non-transient computer readable storage medium storing program for executing stores computer instruction, and the computer instruction makes the computer perform above-mentioned traffic
The acquisition methods of flag information threshold value.
The acquisition methods and device of road signs information threshold value provided in an embodiment of the present invention, driven by obtaining experimenter
During sailing depending on recognizing time threshold, and each experimenter different traffic signs are combined in each piece of traffic sign depending on recognizing
Time, according to acquisition depending on recognizing the time and obtaining the target traffic sign group for meeting maximum depending on recognizing condition depending on recognizing time threshold
Close, it is corresponding depending on recognizing the time further combined with the combination of target traffic sign, information threshold model is established, obtains road signs information
Threshold value.Considered driver in driving procedure to traffic sign depending on the ability of recognizing, and consider different traffic marks
Will combination improves the accuracy of transport information threshold value acquisition, is further traffic to influence of the driver depending on recognizing traffic sign
Mark is set in the road provides accurate theoretical foundation.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of road signs information threshold value acquisition methods in the embodiment of the present invention；
Fig. 2 is the structural representation of road signs information threshold value acquisition device in the embodiment of the present invention；
Fig. 3 is the structural representation of the electronic equipment for the acquisition for being used for road signs information threshold value in the embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 is the schematic flow sheet of road signs information threshold value acquisition methods in the embodiment of the present invention, as shown in figure 1, this
The acquisition methods for the road signs information threshold value that inventive embodiments provide include：
S1, obtain regarding when experimenter drives and recognize time threshold, and the experimenter is in the combination of different traffic signs
Each piece of traffic sign depending on recognizing the time；
Specifically, the embodiment of the present invention by choosing a certain amount of experimenter test depending on recognizing traffic sign, and simulation is real
The person of testing is carried out in driving procedure depending on recognizing traffic sign, and traffic sign can be specifically carried out by drive simulation storehouse depending on the reality recognized
Test.First obtain driver be experimenter in the process of moving depending on recognizing time threshold, refer to depending on recognizing time threshold：In driver's row
Sail in the direction of advance of road, traffic sign from enter the field range of driver to go out the field range of driver when
Between it is poor.Such as：One piece of traffic sign is set in the direction of advance of the travel of driver, when driver is along road driving,
The position that the traffic sign enters driver's seat is A points, and the visual field position that the traffic sign goes out driver is B points (i.e. from B points
Start, driver's can't see the traffic sign within sweep of the eye).It can be seen that the distance between A points and the traffic sign are big
In the distance between B points and the traffic sign, using driver from A points to the running time of B points as depending on recognizing time threshold.Obtain again
Take each experimenter different traffic signs are combined in each piece of traffic marking depending on recognizing the time, specifically can be in advance by traffic mark
Will is classified, and one piece of traffic sign is arbitrarily selected from each classification and is used to test, and the traffic sign that will be singled out is carried out
Any combination, obtain each piece of traffic sign during each experimenter combines to different traffic signs depending on recognizing the time.Wherein depending on recognizing
Time refers to experimenter from the picture of traffic sign is seen to the time interval the implication for reflecting the traffic sign, can be with
The picture of traffic sign is seen to the time for the implication for saying the traffic sign by obtaining experimenter, or passes through software analysis
The brain activity of experimenter, obtain the time that experimenter reflects the implication of traffic sign.
Experimenter can be chosen as needed, in order to ensure the accuracy that the time is understood depending on recognizing obtained, the present invention
According to sex, driving age and age in embodiment, different sexes, driving age and experimenter corresponding to the age are chosen.Certainly according to need
Will, experimenter can be chosen according to other conditions and tested, the quantity of experimenter can also be chosen as needed, this hair
Bright embodiment is not specifically limited.
As can be seen that the experimenter in the embodiment of the present invention needs driving experience, with ensure traffic sign depending on recognizing when
Between the accuracy that obtains.Classification for traffic sign, traffic sign can be classified depending on recognizing the time according to driver,
It can also be classified according to other modes, the embodiment of the present invention is not specifically limited.
Such as：If traffic sign is fallen into 5 types in advance, arbitrarily picked out from 5 class traffic signs 5 pieces it is different types of
Traffic sign, the traffic sign that will be singled out are combined, and the quantity of the traffic sign in each combination can be with
It may include 5 pieces or 4 pieces or 3 pieces or 2 pieces of traffic signs in the combination of difference, i.e. each traffic sign.Such as：If the traffic selected
It is masked as：Driveway travel directions mark, Stop and give way mark, fingerpost, speed(-)limit sign and no left turn mark, then can will
This 5 pieces are combined together as a kind of combination, can also arbitrarily select 4 pieces of combinations, such as：Driveway travel directions mark, stop
Car yield signs, fingerpost and speed(-)limit sign are as a kind of combination, or Stop and give way mark, fingerpost, speed limit mark
Will and no left turn mark are as a kind of combination etc..Depending on recognizing traffic mark during being travelled in the road by drive simulating person
The experiment of will, when acquisition experimenter combines to different traffic signs, to each of which block traffic sign depending on recognizing the time.Such as：Obtain
Take driveway travel directions mark, Stop and give way mark, fingerpost, speed(-)limit sign and no left turn mark 5 piece traffic sign group
During conjunction, obtain experimenter to driveway travel directions marks regard recognize the time, Stop and give way indicate depending on recognizing time, fingerpost
Depending on recognize the time, speed(-)limit sign depending on recognize time and no left turn mark depending on recognizing the time.
S2, the time recognized and described regard recognizes time threshold according to described regard, obtain target traffic of the satisfaction maximum depending on recognizing condition
Mark combination；
Specifically, experimenter is to each piece of traffic mark when the embodiment of the present invention combines according to the different traffic signs got
Will depending on recognizing the time, and the experimenter got in driving procedure depending on recognizing time threshold, obtain and meet maximum depending on recognizing condition
Target traffic sign combination.
S3, combined according to the target traffic sign in described regard corresponding to each piece of traffic sign recognize the time, build and believe
Threshold model is ceased, road signs information threshold value is obtained according to described information threshold model.
Specifically, after getting the combination of target traffic sign, according to target traffic sign combination and experimenter to target
Regarding for each piece of traffic sign is recognized the time in traffic sign combination, structure information threshold model, is obtained using the information threshold model
Take road signs information threshold value.After getting road signs information threshold value, the information threshold can be utilized by various traffic signs
Reasonably set and be laid out on road, travelled in the road so that the layout of traffic sign can improve driver
When effects of visual cognition.
The acquisition methods of road signs information threshold value provided in an embodiment of the present invention, by obtaining experimenter in driving procedure
In depending on recognizing time threshold, and each experimenter different traffic signs are combined in each piece of traffic sign depending on recognizing the time,
According to acquisition depending on recognizing the time and obtaining the target traffic sign combination for meeting maximum depending on recognizing condition depending on recognizing time threshold, enter one
Depending on recognizing the time corresponding to the traffic sign combination of step combining target, information threshold model is established, obtains road signs information threshold value.It is comprehensive
Conjunction consider driver in driving procedure to traffic sign depending on the ability of recognizing, and consider different traffic signs and combine pair
Influence of the driver depending on recognizing traffic sign, the accuracy of transport information threshold value acquisition is improved, is further traffic sign in road
Set in road and accurate theoretical foundation is provided.
On the basis of above-described embodiment, depending on recognizing the time and described depending on recognizing time threshold described in the basis, obtain and meet
The maximum target traffic sign depending on recognizing condition combines, including：
According to described depending on recognizing the time, obtain corresponding to all traffic sign combinations depending on recognizing temporal summation；
Traffic sign quantity identical traffic sign is combined, combined as same class traffic sign, builds traffic combination
Array, it is designated as Mi=[m1 m2...mj], i represents the quantity of traffic sign in the traffic combination array, mjRepresent the traffic
Combine j-th of traffic sign combination, i in array>1, j>1；
If the traffic sign array MiIn it is described little depending on recognizing temporal summation corresponding to all traffic sign combinations
In described depending on recognizing time threshold, and traffic sign array Mi+1It is middle to exist described in corresponding to a traffic sign combination depending on recognizing the time
Summation be more than it is described depending on recognizing time threshold, then by the traffic sign array MiIn the combination of each traffic sign be used as the target
Traffic sign combines.
Specifically, obtain first all traffic signs in the combination of different traffic signs depending on recognizing temporal summation, such as：If certain
Kind traffic sign combination includes 5 pieces of traffic signs, obtains each piece of traffic sign during experimenter combines to the traffic sign and regards
Recognize the time, using this five pieces of traffic sign depending on recognize the time and as this kind of traffic sign depending on recognizing temporal summation.By traffic mark
The combination of will quantity identical traffic sign is combined as a kind of traffic sign, is built a traffic combination array, is designated as Mi=[m1
m2...mj], i represents the quantity of traffic sign in traffic combination array, mjRepresent j-th of traffic sign group in traffic combination array
Close, i>1, j>1.Such as：If sharing 5 class traffic signs, will per class traffic sign in arbitrarily select one piece of traffic sign and be combined,
Assuming that the traffic sign picked out is respectively A, B, C, D and E.There is only a kind of group of 5 pieces of traffic signs in traffic sign combination
Close [A B C D E], there are 4 pieces of traffic signs there are 3 kinds of combinations [A B C D], [A B C E] and [B C D E], according to this method
Have 3 pieces of traffic signs has 5 kinds of combinations, have 2 pieces of traffic signs has 10 kinds of combinations, and the traffic sign for having 1 piece has 5 kinds of groups
Close.Combined using the combination of traffic sign quantity identical as a kind of traffic sign, such as：The combination for having 4 pieces of traffic signs has 3
Kind, then construct array M4=[m1 m2 m3], wherein m1、m2And m3Traffic sign combination [A B C D], [A can be represented respectively
B C E] and [B C D E].
After building traffic sign array, judge that each traffic sign combination is corresponding depending on recognizing in different traffic sign arrays
Temporal summation and depending on recognizing the relation between time threshold.If traffic sign array MiIn regard corresponding to all traffic sign combinations
Temporal summation is recognized no more than depending on recognizing time threshold, and traffic sign array Mi+1It is middle to exist corresponding to a traffic sign combination
It is more than depending on recognizing temporal summation depending on recognizing time threshold, then by traffic sign array MiEach traffic sign combination is handed over as the target
Logical mark combination.
Such as：There is traffic combination array M corresponding to the combination of 4 pieces of traffic signs4=[m1 m2 m3], wherein m1、m2And m3
It can represent that traffic sign combines [A B C D], [A B C E] and [B C D E] respectively, if traffic sign combines [A B C
D], corresponding to [A B C E] and [B C D E] depending on recognizing temporal summation no more than obtaining in advance depending on recognizing time threshold.Also,
There is traffic combination array M corresponding to the combination of 5 traffic signs5=[m1], wherein m1Traffic sign combination [A B C D E] is represented,
Temporal summation is recognized more than obtaining in advance depending on recognizing time threshold if being regarded corresponding to traffic sign combination [A B C D E].To then have 4
The combination [A B C D], [A B C E] and [B C D E] of block traffic sign is combined as target traffic sign.
The acquisition methods of road signs information threshold value provided in an embodiment of the present invention, combined by obtaining different traffic signs
The corresponding relation depending on recognizing temporal summation and depending on recognizing between time threshold, obtain and meet the maximum target traffic sign depending on recognizing condition
Combination, that is, obtained and respectively less than combined depending on recognizing temporal summation depending on recognizing the traffic sign of time threshold, and traffic sign threshold is obtained to be follow-up
Value provides accurate data basis.Considered driver in driving procedure to traffic sign depending on the ability of recognizing, it is and comprehensive
Close and consider that different traffic sign combinations to influence of the driver depending on recognizing traffic sign, improve the accurate of transport information threshold value acquisition
Property, further set in the road for traffic sign and accurate theoretical foundation is provided.
On the basis of above-described embodiment, each piece of traffic sign is corresponding in the combination according to the target traffic sign
It is described depending on recognizing the time, build information threshold model, including：
Depending on recognizing the time according to corresponding to each piece of traffic sign in target traffic sign combination, structure polynary one
Equation of n th order n group, the quantity of the unknown quantity are the quantity of traffic sign in target traffic sign combination；
Using the multi head linear equation group as described information threshold model.
Specifically, the embodiment of the present invention is according to corresponding to each piece of traffic sign in the target traffic sign combination got
Depending on recognizing the time, component multi head linear equation group, the wherein quantity of the unknown quantity of multi head linear equation group and target traffic sign group
The quantity of traffic sign in conjunction is identical, using the multi head linear equation group as information threshold model.Such as：If there are 4 pieces of traffic
The combination [A B C D], [A B C E] and [B C D E] of mark is combined for target traffic sign, then can be according to the traffic mark
4 yuan of linear function groups of component, that is, there are 4 unknown quantitys depending on recognizing the time corresponding to each piece of traffic sign in will combination, can pass through
The value of unknown quantity is solved, obtains road signs information threshold value.
On the basis of above-described embodiment, methods described also includes：
In being combined according to the experimenter of different driving ages to the target traffic sign each piece of traffic sign depending on recognizing the time,
Determine the coefficient of unknown quantity described in the multi head linear equation group.
Specifically, in the research process of the embodiment of the present invention, find the driving age to experimenter depending on recognizing each traffic sign
Time is had a significant impact, and therefore, the embodiment of the present invention is handed over target according to the driving age of experimenter according to the experimenter of different driving ages
In logical mark combination each piece of traffic sign depending on recognizing the time, determine the coefficient of each unknown quantity in multi head linear equation group.When
So, as needed, each traffic sign carries out its other party depending on recognizing the time in can also being combined to the target traffic sign of acquisition
The data processing of formula, determines the coefficient of multi head linear equation group, and the embodiment of the present invention is not specifically limited.
Such as：The target traffic sign that the embodiment of the present invention determines is combined as the combination for including 4 pieces of traffic signs, then
It is as follows to establish quaternary linear function group：
Wherein x, y, z, w is amount to be asked, the correlation of as four kinds traffic signs, and a, b, c, d value are 40
Experimenter is driver depending on recognizing time data.A represents the driving age as the average depending on recognizing the time of 1-2, a1、a2、a3And a4Table respectively
Show experimenter of the driving age for 1-2 in the combination of target traffic sign depending on recognizing first piece, second piece, the 3rd piece and the 4th piece traffic
It is average depending on recognizing the time corresponding to mark；B represents the driving age as the average depending on recognizing the time of 2-3, b1、b2、b3And b4The driving age is represented respectively
For 2-3 experimenter target traffic sign combination in depending on recognizing first piece, second piece, the 3rd piece and the 4th piece traffic sign pair
That answers is average depending on recognizing the time；C represents the driving age as the average depending on recognizing the time of 3-4, c1、c2、c3And c4Represent that the driving age is 3-4 respectively
The experimenter in year is in the combination of target traffic sign depending on recognizing corresponding to first piece, second piece, the 3rd piece and the 4th piece traffic sign
Averagely depending on recognizing the time；D represents the driving age as 5 years and average depending on recognizing the time, the d of the above1、d2、d3And d4It is 5 years to represent the driving age respectively
Experimenter regarded in the combination of target traffic sign recognize corresponding to first piece, second piece, the 3rd piece and the 4th piece traffic sign it is flat
Depending on recognizing the time.Summation of four kinds of traffic signs depending on recognizing time when e values are traffic sign single setting, i.e. experimenter are every time
Depending on recognizing one piece of traffic sign in four kinds of traffic signs, using corresponding to four pieces of traffic signs depending on recognizing time sum as e values.
Each traffic sign in being combined according to the driving age of experimenter to each experimenter got to target traffic sign
Arranged depending on recognizing the time, obtain the coefficient of above-mentioned quaternary linear function group, concrete outcome such as table 1 below：
Table 1 is based on driving experience traffic sign depending on recognizing chronological classification result
| Datum | 1 | 2 | 3 | 4 |
| a | 432 | 411 | 397 | 282 |
| b | 508 | 488 | 472 | 379 |
| c | 719 | 692 | 628 | 548 |
| d | 1147 | 952 | 1022 | 1208 |
| e | 4106 | 4106 | 4106 | 4106 |
By solving above-mentioned quaternary linear function group, the value of each unknown quantity can be obtained, according to the unknown quantity of acquisition
Value can obtain traffic sign threshold value.
It is described that road signs information threshold value, bag are obtained according to described information threshold model on the basis of above-described embodiment
Include：
The value of each unknown quantity is obtained according to the multi head linear equation group, minimum unknown quantity will be worth as benchmark not
The amount of knowing；
The value of the benchmark unknown quantity is normalized, and by the target traffic sign combine in each unknown quantity
Value and the benchmark unknown quantity value between value of the ratio as each unknown quantity；
Using the value of each unknown quantity in the multi head linear equation and as the road signs information threshold value.
Specifically, by solving multi head linear equation group, the value of each unknown quantity is obtained, by the unknown quantity that its intermediate value is minimum
As benchmark unknown quantity.The benchmark unknown quantity is normalized, will the benchmark unknown quantity value as 1, obtain it
Ratio between his each unknown quantity and the benchmark unknown quantity, as the value of each position quantity, using each unknown quantity and as
The information threshold of traffic sign.Can also, when solving multi head linear equation, by traffic sign of the experimenter depending on recognizing time minimum
Corresponding unknown quantity, directly using the value of the benchmark unknown quantity as 1, carries out solution multi head linear equation as benchmark unknown quantity
Group.
The acquisition methods of road signs information threshold value provided in an embodiment of the present invention, according to the satisfaction maximum got depending on recognizing
In the target traffic sign combination of condition each piece of traffic sign depending on recognizing the time, with mathematical method, build polynary first power
Journey group, road signs information threshold value is obtained by solving multi head linear equation group.Phase between different traffic signs is considered
The effect mutually influenceed, information multiple between different traffic signs can be obtained by solving multi head linear equation, is further obtained
Obtain road signs information threshold value.Different traffic sign combinations are considered to influence of the driver depending on recognizing traffic sign, are improved
The accuracy that transport information threshold value obtains, further set in the road for traffic sign and accurate theoretical foundation is provided.
On the basis of above-described embodiment, it is described obtain when experimenter drives depending on recognizing time threshold, including：
According to the distance of visual cognition and drive speed of each experimenter, the average distance of visual cognition of the multiple experimenters of acquisition
With average drive speed, the ratio of the average distance of visual cognition and average drive speed is used as described depending on recognizing time threshold.
Specifically, the embodiment of the present invention chooses several experimenters and carries out being tested depending on recognizing for traffic sign in advance, obtains several
The distance of visual cognition and drive speed of experimenter, according to the distance of visual cognition and drive speed of multiple experimenters, obtain multiple experimenters
Average distance of visual cognition and average drive speed, using the ratio of average distance of visual cognition and average drive speed as depending on recognizing time threshold
Value.
Such as：One piece of traffic sign is set in default section, obtains when 10 drivers travel in default section and sees
To coordinate corresponding to traffic sign and can't see coordinate corresponding to traffic sign, regarding for each driver is obtained according to the coordinate
Recognize distance, further obtain the average distance of visual cognition of 10 drivers.Each driver is obtained in distance of visual cognition simultaneously
Drive speed, further obtain the average drive speed of 10 drivers.By average distance of visual cognition and the ratio of average drive speed
Value is as depending on recognizing time threshold.Specific data handling procedure may refer to table 2：
Table 2 is depending on recognizing time threshold data processing table
On the basis of above-described embodiment, each piece of traffic mark obtained during experimenter combines to different traffic signs
Will depending on recognizing the time, including：
Experiment video of each experimenter depending on recognizing traffic sign is recorded by eye tracker；
According to the experiment video, the experimenter is obtained to each piece of traffic sign in the combination of different traffic signs
Depending on recognizing the time started and depending on recognizing the end time, by it is described depending on recognize the end time and it is described depending on recognize the time difference between the time started make
To be described depending on recognizing the time.
Specifically, this law inventive embodiments carry out traffic sign depending on recognizing experiment, experiment using drive simulation storehouse and eye tracker
Person wears eye tracker drive simulating in drive simulation storehouse, and sets different traffic signs to combine in drive simulating scene,
Experimenter is depending on recognizing each traffic sign in simulated scenario.Experiment of the experimenter depending on recognizing traffic sign is recorded by eye tracker to regard
Frequently, the experiment video of acquisition is analyzed and processed, obtains each piece of traffic mark during experimenter combines to different traffic signs
Will depending on recognizing the time started and depending on recognizing the end time, using depending on recognizing the end time and depending on recognizing the time difference between the time started as every
One piece of traffic sign depending on recognizing the time.
The embodiment of the embodiment of the present invention is described below, to be better understood from the technology of this law inventive embodiments
Scheme：
(1) experimental data obtains
1) preliminary experiment
Preliminary experiment mainly has 10 drivers to participate in, and experiment content is unique identification depending on recognizing.Experimentation is as follows：
A. driver carries out questionnaire training, informs that driver specifies travel route；
B. determine driver whether recognize it is following 5 kinds mark, driveway travel directions mark, Stop and give way mark, fingerpost
Will, speed(-)limit sign and no left turn mark；
C. eye tracker is worn, carries out coordinate demarcation；
D. driver starts simulator, and video is tested by computer record, is recognized by the record driver of operator backstage
The coordinate and speed that mark and cognition mark terminate；
Operator's inspection operation platform data, put experiment material in order, it is ensured that non-drain message, complete experiment.
The average drive speed and average distance of visual cognition of preliminary experiment primary draw driver, so that it is determined that depending on recognizing time threshold
Value.
2) formal experiment
Totally 40 drivers participate in for formal experiment, and experiment content is that a variety of traffic signs are combined depending on recognizing.Experimentation is as follows：
A. driver carries out questionnaire training, and informs driver's each driving behavior corresponding to mark；
B. inform that each scene of driver specifies travel route, test totally three scenes, totally 15 intersections；
C. eye tracker is worn, carries out coordinate demarcation；
D. driver starts simulator, the video each tested by computer record；
E. operator's inspection operation platform data, put experiment material in order, it is ensured that non-drain message, complete experiment.
(2) Data Processing in Experiment, the combination of target traffic sign is obtained
1) preliminary data is handled
The experiment video file of eye tracker record is extracted, driver's blinkpunkt is watched attentively and carried in the time of traffic sign
Take.The software of extracting method application programming, every piece of traffic sign blinkpunkt is recorded from the background and starts with blinkpunkt to terminate depending on recognizing depending on recognizing
Time, obtain corresponding to every piece of traffic sign depending on recognizing the time.By multitude of video data processing, single traffic mark can be obtained
When will is depending on recognizing each piece of traffic sign depending on recognizing time such as table 3, (position only sets one piece of traffic sign at i.e. one, and driver is to this
One piece of traffic sign is carried out depending on recognizing)：
3 single traffic sign of table is depending on recognizing time and ratio
Obtained by preliminary experiment depending on recognizing the specific data of time threshold as shown in upper table 2, when in the embodiment of the present invention depending on recognizing
Between threshold value be 3.95s.
2) formal Data Processing in Experiment
Formal Data Processing in Experiment similarly preliminary experiment, mainly extract eye tracker record experiment video depending on recognizing the time.Will
Driver's blinkpunkt is seated in being extracted depending on recognizing the time for every piece of traffic sign, 40 videos of coprocessing, each video extraction
15 intersection data, need to extract the fixation time of every piece of traffic sign in each intersection, so altogether more than 3000
Bar big data.Traffic sign is fallen into 5 types in the embodiment of the present invention, and one piece of progress traffic sign group is picked out in every one kind
Close depending on recognizing, the traffic sign selected be forbid right lateral, driveway travel directions, speed limit 40, Stop and give way and fingerpost.
Combination including 5 pieces of traffic signs only have one kind, when forbid right lateral, driveway travel directions, speed limit 40, parking
When giving way with fingerpost common combination, experimenter is as shown in table 4 below depending on recognizing the time to each traffic sign：
Every piece of traffic sign is depending on recognizing time summary sheet during 4 five kinds of traffic sign combinations of table
It can be seen from 5 kinds of traffic sign combining form data processings, 5 kinds of traffic signs depending on recognizing 3997 milliseconds of temporal summation
More than driver depending on recognizing 3950 milliseconds of time threshold, so understanding that the setting of 5 kinds of traffic signs alreadys exceed driver and can managed
The information threshold of solution.Shown according to data processed result, when traffic sign is carrying out multiple combinations, driver depending on recognizing the time
Be significantly less than the single setting of mark depending on recognizing the time, and between each mark be also different (to be embodied in friendship depending on recognizing relation
Logical mark is depending on recognizing ratio difference, and ratio reduces).Study carefully the reason for it diminishes depending on recognizing the time be mainly a variety of traffic signs it
Between the influence combined, driver is in finite time domestic demand depending on recognizing all marks, and eye moves increasingly complex, essence during than depending on recognizing unique identification
Power is more concentrated, and causes to drive the more senses of urgency of human psychological's generation.Indicate diminishing explanation depending on recognizing time scale between mark
There is influencing each other between traffic sign and mark, its depending on recognize relation can increasing or reduce change with mark, institute
Should not be according to the information of intrinsic univocality and ambiguity during studying the relation of each road signs information, but need according to mark
The information relationship of a variety of traffic sign combinations of complexity and arrangement law study of will.
During combination including 4 pieces of traffic signs has 3, when forbidding left lateral, speed limit 40, driveway travel directions and fingerpost
During will common combination, experimenter is as shown in table 5 depending on recognizing the time to each traffic sign：
When no right turn, Stop and give way, driveway travel directions and during fingerpost common combination, and experimenter is to each traffic
What is indicated is as shown in table 6 depending on recognizing the time：
Every piece of traffic sign is depending on recognizing time summary sheet during 5 four kinds of traffic sign combinations of table
Every piece of traffic sign is depending on recognizing time summary sheet during 6 four kinds of traffic sign combinations of table
When speed limit 40, Stop and give way, driveway travel directions and during fingerpost common combination experimenter to each traffic mark
Will it is as shown in table 7 depending on recognizing the time：
Every piece of traffic sign is depending on recognizing time summary sheet during 7 four kinds of traffic sign combinations of table
Three kinds of situations of 4 kinds of traffic sign combining forms more than, from data processing, 4 kinds of traffic signs regard
It is 3063 milliseconds, 3790 milliseconds and 3476 milliseconds respectively to recognize temporal summation, respectively less than driver's cognitive psychological depending on recognizing time threshold
3950 milliseconds of value, so understanding the setting of 4 kinds of traffic sign combinations in the range of the information threshold that driver can receive.And
And it is more than in the combination of 5 kinds of traffic signs depending on recognizing temporal summation depending on recognizing time threshold, it is possible to draw a conclusion, 4 kinds of traffic marks
In will combination, the regarding of every kind of traffic sign recognize the time be respectively less than single traffic sign depending on recognizing the time, and mark and mark
Between depending on recognize ratio reduce, equally also illustrate that the interaction influenceed between traffic sign.Also, between various traffic signs
Proportionate relationship, be with the difference of a variety of traffic sign combining forms, produce corresponding change.
Relation of the above-mentioned Data Processing in Experiment result between verified road signs information is not simply by letter
Breath content increase and be overlapped, it is necessary to study its correlation by certain mathematical method.In order to probe into four kinds of traffic
The information relationship of mark, only by the proportionate relationship depending on recognizing time average, science and do not forbid.The embodiment of the present invention exists
After the quality of the methods of comparison structure equation, solving equations, it finally have chosen and mutually closed than four kinds of parameters of more typical solution
The research method of system --- quaternary linear function group, referring specifically to above-mentioned formula (1).
By that will be that unknown quantity x does normalized, the quaternary linear function group, unknown quantity x, y, z, w value point be solved
Not Wei 1,1.4,1.6 and 2, so four kinds mark corresponding relations be 1:1.4:1.6:2, i.e., when 4 kinds of traffic signs are combined
When, its information multiple proportion is 1:1.4:1.6:2, it is 6 to obtain road signs information threshold value.Carrying out the layout of traffic sign
When, in the Information Number no more than 6 for the traffic sign that same crossing can at most be arranged, can be obtained by the above method each
Relation between individual traffic sign, according to the relation between each traffic sign, the information threshold of traffic sign combination is obtained, is entered
The layout of row traffic sign.The Information Number of same category of traffic sign may be considered identical, carry out traffic sign cloth
During office, same category of traffic sign can be replaced.
8 single traffic sign of table is depending on recognizing with combining traffic sign depending on recognizing ratio contrast
| Type of sign | Depending on recognizing time scale in the case of single | Depending on recognizing time scale under combined situation |
| No right turn | 1 | 1 |
| Speed limit 40 | 1.47 | 1.4 |
| Driveway travel directions | 2.35 | 1.6 |
| Fingerpost (6 road concrete numbers) | 4.84 | 2 |
When table 8 combines for single setting depending on recognizing traffic sign ratio with traffic sign, the contrast table depending on recognizing ratio, pass through number
Understood according to contrast, traffic sign in single setting with a variety of settings when, due to interactional effect between by traffic sign,
Respectively indicate depending on recognizing ratio it is different, i.e., information multiple is different between each traffic sign.
The acquisition methods of road signs information threshold value provided in an embodiment of the present invention, according to driver to different traffic signs
In combination each traffic sign depending on recognizing the time and depending on recognizing the magnitude relationship between time threshold, determine target traffic sign group
Close.Information threshold model and multi head linear equation group are further established according to the combination of target traffic sign, by solving equation group,
The information multiple proportion between each traffic sign in the combination of target traffic sign is obtained, obtains road signs information threshold value.It is comprehensive
Close and consider different traffic sign combinations to influence of the driver depending on recognizing traffic sign, and during the combination of different traffic signs, it is each
Influence relation between traffic sign, the accuracy of transport information threshold value acquisition is improved, is further traffic sign in road
Middle set provides accurate theoretical foundation.
Fig. 2 is the structural representation of road signs information threshold value acquisition device in the embodiment of the present invention, as shown in Fig. 2 this
The road signs information threshold value acquisition device that inventive embodiments provide, including：Depending on recognizing time acquisition unit 21, traffic sign combination
Acquiring unit 22 and information threshold acquiring unit 23, wherein：
Depending on recognize time acquisition unit 21 be used for obtain experimenter drive when depending on recognizing time threshold, and the experimenter couple
Each piece of traffic sign in the combination of different traffic signs depending on recognizing the time；Traffic sign combination acquiring unit 22 is used for according to institute
State depending on recognizing the time and described depending on recognizing time threshold, obtain and meet the maximum target traffic sign combination for regarding and recognizing condition；Information threshold
Acquiring unit 23 is used in being combined according to the target traffic sign build depending on recognizing the time described in corresponding to each piece of traffic sign
Information threshold model, road signs information threshold value is obtained according to described information threshold model.
Specifically, the embodiment of the present invention by choosing a certain amount of experimenter test depending on recognizing traffic sign, and simulation is real
The person of testing is carried out in driving procedure depending on recognizing traffic sign, and traffic sign can be specifically carried out by drive simulation storehouse depending on the reality recognized
Test.Depending on recognize time acquisition unit 21 obtain driver i.e. experimenter in the process of moving depending on recognizing time threshold and each experimenter
Each piece of traffic marking depending on recognizing the time in being combined to different traffic signs.Specific acquisition methods are consistent with above-described embodiment, this
Place repeats no more.Traffic sign combines acquiring unit 22 according to experimenter during the different traffic signs combination got to each piece
Traffic sign depending on recognizing the time, and the experimenter got in driving procedure depending on recognizing time threshold, acquisition meets that maximum regards
Recognize the target traffic sign combination of condition.After getting the combination of target traffic sign, information threshold acquiring unit 23 is according to the mesh
Regarding for each piece of traffic sign is recognized the time during the combination of mark traffic sign and experimenter combine to target traffic sign, structure information threshold
It is worth model, road signs information threshold value is obtained using the information threshold model.After getting road signs information threshold value, Ke Yili
Various traffic signs on road are reasonably set and are laid out with the information threshold, so that the layout of traffic sign
Effects of visual cognition when driver travels in the road can be improved.
The acquisition device of road signs information threshold value in the embodiment of the present invention is specifically used for performing above-mentioned traffic sign letter
The acquisition methods of threshold value are ceased, its embodiment is consistent with above-described embodiment, and here is omitted.
The acquisition device of road signs information threshold value provided in an embodiment of the present invention, by obtaining experimenter in driving procedure
In depending on recognizing time threshold, and each experimenter different traffic signs are combined in each piece of traffic sign depending on recognizing the time,
According to acquisition depending on recognizing the time and obtaining the target traffic sign combination for meeting maximum depending on recognizing condition depending on recognizing time threshold, enter one
Depending on recognizing the time corresponding to the traffic sign combination of step combining target, information threshold model is established, obtains road signs information threshold value.It is comprehensive
Conjunction consider driver in driving procedure to traffic sign depending on the ability of recognizing, and consider different traffic signs and combine pair
Influence of the driver depending on recognizing traffic sign, the accuracy of transport information threshold value acquisition is improved, is further traffic sign in road
Set in road and accurate theoretical foundation is provided.
Fig. 3 is the structural representation of the electronic equipment for the acquisition for being used for road signs information threshold value in the embodiment of the present invention,
As shown in figure 3, the electronic equipment can include：Processor (processor) 31, memory (memory) 32 and communication bus
33, wherein, processor 31, memory 32 completes mutual communication by communication bus 33.Processor 31 can call storage
Logical order in device 32, to perform following method：Obtain experimenter drive when depending on recognizing time threshold, and the experimenter
To each piece of traffic sign in the combination of different traffic signs depending on recognizing the time；According to described depending on recognizing the time and described depending on recognizing the time
Threshold value, obtain and meet that the maximum target traffic sign depending on recognizing condition combines；Each piece in being combined according to the target traffic sign
It is described depending on recognizing the time corresponding to traffic sign, information threshold model is built, traffic sign is obtained according to described information threshold model
Information threshold.
In addition, the logical order in above-mentioned memory 32 can be realized by the form of SFU software functional unit and is used as solely
Vertical production marketing in use, can be stored in a computer read/write memory medium.Based on such understanding, this hair
The part or the part of the technical scheme that bright technical scheme substantially contributes to prior art in other words can be with soft
The form of part product is embodied, and the computer software product is stored in a storage medium, including some instructions are making
Obtain a computer equipment (can be personal computer, server, or network equipment etc.) and perform each embodiment of the present invention
The all or part of step of methods described.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM,
Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. it is various
Can be with the medium of store program codes.
The embodiment of the present invention provides a kind of non-transient computer readable storage medium storing program for executing, the non-transient computer readable storage
Medium storing computer instructs, and the computer instruction makes the computer perform the side that above-mentioned each method embodiment is provided
Method, such as including：Obtain regarding when experimenter drives and recognize time threshold, and the experimenter is in the combination of different traffic signs
Each piece of traffic sign depending on recognizing the time；According to described depending on recognizing the time and described depending on recognizing time threshold, acquisition meets that maximum regards
Recognize the target traffic sign combination of condition；Regarded according to corresponding to each piece of traffic sign in target traffic sign combination
Recognize the time, build information threshold model, road signs information threshold value is obtained according to described information threshold model.
Device and system embodiment described above is only schematical, wherein described be used as separating component explanation
Unit can be or may not be physically separate, can be as the part that unit is shown or may not be
Physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Can be according to the actual needs
Some or all of module therein is selected to realize the purpose of this embodiment scheme.Those of ordinary skill in the art are not paying
In the case of performing creative labour, you can to understand and implement.
Claims (10)
- A kind of 1. acquisition methods of road signs information threshold value, it is characterised in that including：Obtain regarding when experimenter drives and recognize time threshold, and the experimenter is to each piece in the combination of different traffic signs Traffic sign depending on recognizing the time；According to described depending on recognizing the time and described depending on recognizing time threshold, obtain and meet the maximum target traffic sign group depending on recognizing condition Close；Depending on recognizing the time according to corresponding to each piece of traffic sign in target traffic sign combination, information threshold mould is built Type, road signs information threshold value is obtained according to described information threshold model.
- 2. according to the method for claim 1, it is characterised in that depending on recognizing the time and described depending on recognizing time threshold described in the basis Value, obtain and meet that the maximum target traffic sign depending on recognizing condition combines, including：According to described depending on recognizing the time, obtain corresponding to all traffic sign combinations depending on recognizing temporal summation；Traffic sign quantity identical traffic sign is combined, combined as same class traffic sign, builds traffic combination array, It is designated as Mi=[m1m2...mj], i represents the quantity of traffic sign in the traffic combination array, mjRepresent the traffic combination number J-th of traffic sign combination, i in group>1, j>1；If the traffic sign array MiIn it is described depending on recognizing temporal summation no more than described corresponding to all traffic sign combinations Depending on recognizing time threshold, and traffic sign array Mi+1It is described big depending on recognizing temporal summation corresponding to middle one traffic sign combination of presence In described depending on recognizing time threshold, then by the traffic sign array MiIn the combination of each traffic sign be used as the target traffic mark Will combines.
- 3. according to the method for claim 2, it is characterised in that each piece in the combination according to the target traffic sign It is described depending on recognizing the time corresponding to traffic sign, structure information threshold model, including：Depending on recognizing the time according to corresponding to each piece of traffic sign in target traffic sign combination, polynary first power is built Journey group, the quantity of the unknown quantity of the multi head linear equation group are the quantity of traffic sign in target traffic sign combination；Using the multi head linear equation group as described information threshold model.
- 4. according to the method for claim 3, it is characterised in that methods described also includes：In being combined according to the experimenter of different driving ages to the target traffic sign each piece of traffic sign depending on recognizing the time, it is determined that The coefficient of unknown quantity described in the multi head linear equation group.
- 5. the method according to claim 3 or 4, it is characterised in that described that traffic is obtained according to described information threshold model Flag information threshold value, including：The value of each unknown quantity is obtained according to the multi head linear equation group, the unknown quantity for being worth minimum is unknown as benchmark Amount；The value of the benchmark unknown quantity is normalized, and by the target traffic sign combine in each unknown quantity value Value of the ratio as each unknown quantity between the value of the benchmark unknown quantity；Using the value of each unknown quantity in the multi head linear equation and as the road signs information threshold value.
- 6. according to the method for claim 1, it is characterised in that it is described obtain experimenter drive when depending on recognizing time threshold, Including：According to the distance of visual cognition and drive speed of each experimenter, the average distance of visual cognition for obtaining multiple experimenters is peaceful Equal drive speed, the ratio of the average distance of visual cognition and average drive speed is used as described depending on recognizing time threshold.
- 7. according to the method for claim 1, it is characterised in that during the acquisition experimenter combines to different traffic signs Each piece of traffic sign depending on recognizing the time, including：Experiment video of each experimenter depending on recognizing traffic sign is recorded by eye tracker；According to the experiment video, the experimenter is obtained to each piece of traffic sign in the combination of different traffic signs depending on recognizing Time started and depending on recognizing the end time, using described depending on recognizing the end time and described depending on recognizing the time difference between the time started as institute State depending on recognizing the time.
- A kind of 8. acquisition device of road signs information threshold value, it is characterised in that including：Depending on recognizing time acquisition unit, for obtain experimenter drive when depending on recognizing time threshold, and the experimenter to difference Traffic sign combination in each piece of traffic sign depending on recognizing the time；Traffic sign combines acquiring unit, for recognizing the time and described regard recognizes time threshold according to described regard, obtains satisfaction maximum Target traffic sign depending on recognizing condition combines；Information threshold acquiring unit, for being regarded according to corresponding to each piece of traffic sign in target traffic sign combination Recognize the time, build information threshold model, road signs information threshold value is obtained according to described information threshold model.
- A kind of 9. electronic equipment of acquisition for road signs information threshold value, it is characterised in that including：At least one processor；AndAt least one memory being connected with the processor communication, wherein：The memory storage has can be by the programmed instruction of the computing device, and the processor calls described program instruction energy Enough perform the method as described in any one of claim 1 to 7.
- 10. a kind of non-transient computer readable storage medium storing program for executing, it is characterised in that the non-transient computer readable storage medium storing program for executing is deposited Computer instruction is stored up, the computer instruction makes the computer perform the method as described in any one of claim 1 to 7.
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