CN102073857A - Multimodal driver fatigue detection method and special equipment thereof - Google Patents
Multimodal driver fatigue detection method and special equipment thereof Download PDFInfo
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Abstract
The invention provides a multimodal driver fatigue detection method and special equipment thereof. The special equipment comprises a dual-channel vision detection device, a multipoint pressure detection device and a physiological signal real-time detection device which are used for detecting the motion trails of heads, forms of human eyes and mouths, multipoint pressure change curves and pulses, so that information is subjected to multimodal fusion to form a set of multi-characteristic fatigue evaluation scheme; and the accuracy of fatigue detection is increased by multiple fatigue characteristics under the condition that the normal operation of drivers is not interfered. The system design gives priority to practicability, operability and humanization, and the stability and safety and reliability of the system is ensured. The method is reasonable, simple in device, accurate in detection and high in operability, and is favorable for popularization and application.
Description
Technical field
Background technology
Fatigue driving is a key factor that causes traffic hazard, if can detect automatically driver fatigue state, and in time reports to the police, and will effectively reduce the generation of traffic hazard.Existing fatigue detecting method has detection and problems such as evaluation means is single, actual working environment complexity, is difficult to satisfy the practical application needs.And train and long-distance transport automobile be as the important vehicles, and freight volume is big, driver's working time is long, easily sleepy, causes traffic hazard easily, and at present domestic still do not have practical driver fatigue detection and a warning device.
Summary of the invention
Goal of the invention: the invention provides a kind of multi-modal driver fatigue detection method
And specialized equipment, its objective is detection that exists in the solution detection method in the past and problems such as evaluation means is single, actual working environment complexity.
Technical scheme: the present invention is achieved through the following technical solutions:
Multi-modal driver fatigue detection method
, it is characterized in that: the concrete steps of described method are as follows:
The first step: binary channels image acquisition;
⑴, passage one are the wide-angle imaging head, this camera position and direction are fixed, the wide-angle imaging head is gathered complete image in the pilothouse, set up 3 d space coordinate system, in the image that collects in conjunction with the background priori, carry out people's face and detect, judge the three-dimensional coordinate information of driver's head in the space;
⑵, passage two are high-resolution camera, and its position and angle can three-dimensionally move, and the head coordinate information that obtains according to passage 1 passes to passage two, and the shooting angle of placed channel two cameras is obtained driver's face image thus;
Second step: head position three-dimensional coordinate and movement locus are determined
⑴ the image that, the wide-angle imaging head of fixing by position and direction in the passage one provide according to the people face part in priori and the people's face colouring information positioning image, is determined the coordinate information of people's face in three dimensions;
, again by people face part and coordinate information thereof in the fixing wide-angle imaging head abstraction sequence image of position in the passage one and direction, obtain the track of sequence coordinate in three dimensions; Movement locus according to head determines whether to be fatigue state;
The 3rd step: eyes closed state-detection
In conjunction with template matches and integral projection method, on the image that the high-resolution camera that three-dimensional moves is gathered, determine position of human eye; Judge the eyes stretching degree at position of human eye then,, then be judged as closure if less than certain exposed area; Closed degree according to human eye judges whether fatigue;
The 4th step: the mouth open configuration detects
⑴ mouth position is estimated in the position of the human eye that, the high-resolution camera that moves according to three-dimensional are gathered, and seeks the mouth edge unique point near this position;
⑵, analyze the distribution of mouth unique point,, then be judged as the action of magnifying if unique point is divided too far awayly up and down; Action judges whether fatigue according to face;
The 5th step: multiple spot pressure detection and fatigue state detect
, respectively at four jiaos of seats and two jiaos of placement force sensors of backrest of driver, read this force value of 6 in real time;
⑵, the force value of obtaining is carried out filtering operation, remove vehicle advance in the pressure surge that causes of vibration; On pressure curve, seek singular value, judge whether to be fatigue state;
The 6th step: wireless pulse real-time detection apparatus
Gather pulse signal and driver's normal pulse frequency ratio by pulse transducer, judge whether to be fatigue state;
Judge whether to the method for fatigue state in second step to be: according to the head 3 D motion trace, if judge driver's head in 1 second downward fast moving is arranged, perhaps the angle of head and health exceeds allowed band, then can be judged as fatigue state.
Judge whether to the method for fatigue state in the 3rd step to be: the sequence object is carried out the human eye closure state judge, if closure state then was judged as fatigue state greater than 0.5 second continuously.
Judge whether to the method for fatigue state in the 4th step to be: the sequence object is carried out the mouth open configuration judge,, then be judged as fatigue state if magnify state continuously greater than 3 seconds.
Judge whether to the method for fatigue state in the 5th step to be: on pressure curve, seek singular value, be flat condition, then be judged as fatigue state if having 3 or above pressure curve to surpass 100 seconds.
Judge whether to the method for fatigue state in the 6th step to be:, judge tired when detecting pulse when slack-off.
Fatigue detecting characteristic synthetic analysis with second to six step obtained obtains the weights of various fatigue factors according to experimental result, and judges tired situation, then reports to the police in pilothouse if produce tired situation.
Be applied in aforesaid multi-modal driver fatigue detection method
In specialized equipment, it is characterized in that: described equipment comprises binary channels vision inspection apparatus, multiple spot pressure-detecting device, physiological signal real-time detection apparatus, warning device and CPU (central processing unit); Described binary channels vision inspection apparatus, multiple spot pressure-detecting device and physiological signal real-time detection apparatus all are connected to CPU (central processing unit), and CPU (central processing unit) connects warning device.
Described binary channels vision inspection apparatus comprises that wide-angle imaging head that position and direction are fixing and position and angle can the three-dimensional high-resolution cameras that moves; The multiple spot pressure-detecting device is the pressure transducer that is arranged on two jiaos on driver's four jiaos of seats and backrest; The physiological signal real-time detection apparatus is a pulse transducer.
Pulse transducer is the Wrist belt-type structure, and adopts short distance embedded radio communication pattern, and frequency of operation is 300~1000M.
Advantage and effect: the present invention relates to a kind of multi-modal driver fatigue detection method
And specialized equipment
The designed system of this project comprises the binary channels vision inspection apparatus, multiple spot pressure-detecting device and physiological signal real-time detection apparatus, detect head movement locus, human eye and mouth form, multiple spot pressure history and pulse flow respectively, thereby information is carried out multi-modal fusion, form the tired evaluation of programme of the many features of a cover, under the situation of not disturbing driver's operate as normal, utilize a plurality of fatigue characteristics, increase the accuracy of fatigue detecting.Based on practicality, operability, human oriented design, guarantee the stability of system and safe and reliable in this system design.
This inventive method rationally, device is succinct, detection is accurate, workable, is beneficial to and applies.
Description of drawings:
Fig. 1 is the theory diagram of multi-modal driver fatigue detection method of the present invention;
Fig. 2 is a multi-modal driver fatigue detection method of the present invention
In the specialized equipment block diagram.
Embodiment:The present invention is described further below in conjunction with accompanying drawing:
The invention provides a kind of multi-modal driver fatigue detection method
It is characterized in that: the concrete steps of described method are as follows:
The first step: binary channels image acquisition;
⑴, passage one are the wide-angle imaging head, this camera position and direction are fixed, the wide-angle imaging head is gathered complete image in the pilothouse, set up 3 d space coordinate system, in the image that collects in conjunction with the background priori, carry out people's face and detect, judge the three-dimensional coordinate information of driver's head in the space;
⑵, passage two are high-resolution camera, and its position and angle can three-dimensionally move, and the head coordinate information that obtains according to passage 1 passes to passage two, and the shooting angle of placed channel two cameras is obtained driver's face image thus;
Second step: head position three-dimensional coordinate and movement locus are determined
The people is in fatigue, the unconscious action of bowing can take place, can be by sequence image head position in judging 1 second, judge whether to take place this action, if have then be judged as fatigue state, perhaps head and health angle exceed normal operation range, also are judged as fatigue state, and this detection implementation procedure mainly is that the sequence image that passage one collects is carried out analyzing and processing:
⑴ the image that, the wide-angle imaging head of fixing by position and direction in the passage one provide according to the people face part in priori and the people's face colouring information positioning image, is determined the coordinate information of people's face in three dimensions;
, again by people face part and coordinate information thereof in the fixing wide-angle imaging head abstraction sequence image of position and direction, obtain the track of sequence coordinate in three dimensions; Movement locus according to head determines whether to be fatigue state;
Judge whether that the method for fatigue state is according to the head 3 D motion trace, if judge driver's head in 1 second downward fast moving is arranged, perhaps the angle of head and health exceeds allowed band, then can be judged as fatigue state.
The 3rd step: eyes closed state-detection
In conjunction with template matches and integral projection method, on the image that the high-resolution camera that three-dimensional moves is gathered, determine position of human eye; Judge the eyes stretching degree at position of human eye then,, then be judged as closure if less than certain exposed area; Closed degree according to human eye judges whether fatigue; Judge whether to the method for fatigue state to be: the sequence object is carried out the human eye closure state judge, if closure state then was judged as fatigue state greater than 0.5 second continuously.
The 4th step: the mouth open configuration detects
⑴ mouth position is estimated in the position of the human eye that, the high-resolution camera that moves according to three-dimensional are gathered, and seeks the mouth edge unique point near this position;
⑵, analyze the distribution of mouth unique point,, then be judged as the action of magnifying if unique point is divided too far awayly up and down; Action judges whether fatigue according to face;
Judge whether to the method for fatigue state to be: the sequence object is carried out the mouth open configuration judge,, then be judged as fatigue state if magnify state continuously greater than 3 seconds.
The 5th step: design of multiple spot pressure-detecting device and fatigue state detect
, respectively at four jiaos of seats and two jiaos of placement force sensors of backrest of driver, read this force value of 6 in real time;
⑵, the force value of obtaining is carried out filtering operation, remove vehicle advance in the pressure surge that causes of vibration; On pressure curve, seek singular value, judge whether to be fatigue state; Judge whether to the method for fatigue state to be: on pressure curve, seek singular value, be flat condition, then be judged as fatigue state if having 3 or above pressure curve to surpass 100 seconds.
The 6th step: wireless pulse real-time detection apparatus
Gather pulse signal and driver's normal pulse frequency ratio by pulse transducer, judge whether to be fatigue state; Judge whether to the method for fatigue state to be: when detecting pulse when slack-off, judge tiredly, device starts, and reminds the driver to keep clear-headed.The pulse transducer of this device adopts short distance embedded radio communication pattern, and frequency of operation 300~1000M is adjustable, powered battery, and power consumption is little, and radiation is low.Pulse transducer can be made Wrist belt-type, and sizableness is in a wrist-watch, and during use, the driver only need be worn on the wrist and get final product, and is easy to operate, do not influence driver's normal running.
The 7th step:Go on foot the fatigue detecting characteristic synthetic analysis of obtaining with second to six, obtain the weights of various fatigue factors according to experimental result, and judge tired situation, then in pilothouse, report to the police if produce tired situation, warning can be adopted the form of playing back music, reminds the driver to concentrate one's energy to drive.
Method of the present invention is to realize by following device: described device comprises binary channels vision inspection apparatus, multiple spot pressure-detecting device, physiological signal real-time detection apparatus, warning device and CPU (central processing unit); Described binary channels vision inspection apparatus, multiple spot pressure-detecting device and physiological signal real-time detection apparatus all are connected to CPU (central processing unit), CPU (central processing unit) connects warning device, the various signal datas that to gather in CPU (central processing unit) are handled, whether detect is fatigue state, if be fatigue state, then report to the police by warning device.
Described binary channels vision inspection apparatus comprises that wide-angle imaging head that position and direction are fixing and position and angle can the three-dimensional high-resolution cameras that moves, and wide-angle imaging head and high-resolution camera are used to detect head movement locus, human eye and mouth form; The multiple spot pressure-detecting device is the pressure transducer that is arranged on two jiaos on driver's four jiaos of seats and backrest, and pressure transducer is used to detect the multiple spot pressure history; The physiological signal real-time detection apparatus is a pulse transducer, and pulse transducer is used to detect pulse flow.
Pulse transducer is the Wrist belt-type structure, and adopts short distance embedded radio communication pattern, and frequency of operation is 300~1000M.
It is accurate and effective that method and apparatus of the present invention detects effect, not omission, for fatigue driving, have good detection and reminding effect, whether the detection method of the present invention by the comprehensive multi-angle of multipath detects the driver tired, guaranteed accuracy rate fully, be beneficial to and using aspect the detection fatigue driving.
Claims (10)
1. multi-modal driver fatigue detection method
, it is characterized in that: the concrete steps of described method are as follows:
The first step: binary channels image acquisition;
⑴, passage one are the wide-angle imaging head, this camera position and direction are fixed, the wide-angle imaging head is gathered complete image in the pilothouse, set up 3 d space coordinate system, in the image that collects in conjunction with the background priori, carry out people's face and detect, judge the three-dimensional coordinate information of driver's head in the space;
⑵, passage two are high-resolution camera, and its position and angle can three-dimensionally move, and the head coordinate information that obtains according to passage 1 passes to passage two, and the shooting angle of placed channel two cameras is obtained driver's face image thus;
Second step: head position three-dimensional coordinate and movement locus are determined
⑴ the image that, the wide-angle imaging head of fixing by position and direction in the passage one provide according to the people face part in priori and the people's face colouring information positioning image, is determined the coordinate information of people's face in three dimensions;
, again by people face part and coordinate information thereof in the fixing wide-angle imaging head abstraction sequence image of position in the passage one and direction, obtain the track of sequence coordinate in three dimensions; Movement locus according to head determines whether to be fatigue state;
The 3rd step: eyes closed state-detection
In conjunction with template matches and integral projection method, on the image that the high-resolution camera that three-dimensional moves is gathered, determine position of human eye; Judge the eyes stretching degree at position of human eye then,, then be judged as closure if less than certain exposed area; Closed degree according to human eye judges whether fatigue;
The 4th step: the mouth open configuration detects
⑴ mouth position is estimated in the position of the human eye that, the high-resolution camera that moves according to three-dimensional are gathered, and seeks the mouth edge unique point near this position;
⑵, analyze the distribution of mouth unique point,, then be judged as the action of magnifying if unique point is divided too far awayly up and down; Action judges whether fatigue according to face;
The 5th step: multiple spot pressure detection and fatigue state detect
, respectively at four jiaos of seats and two jiaos of placement force sensors of backrest of driver, read this force value of 6 in real time;
⑵, the force value of obtaining is carried out filtering operation, remove vehicle advance in the pressure surge that causes of vibration; On pressure curve, seek singular value, judge whether to be fatigue state;
The 6th step: wireless pulse real-time detection apparatus
Gather pulse signal and driver's normal pulse frequency ratio by pulse transducer, judge whether to be fatigue state.
2. multi-modal driver fatigue detection method according to claim 1
It is characterized in that: judge whether to the method for fatigue state in second step to be: according to the head 3 D motion trace, if judge driver's head in 1 second downward fast moving is arranged, perhaps the angle of head and health exceeds allowed band, then can be judged as fatigue state.
3. multi-modal driver fatigue detection method according to claim 1
, it is characterized in that: judge whether to the method for fatigue state in the 3rd step to be: the sequence object is carried out the human eye closure state judge, if closure state then was judged as fatigue state greater than 0.5 second continuously.
4. multi-modal driver fatigue detection method according to claim 1
, it is characterized in that: judge whether to the method for fatigue state in the 4th step to be: the sequence object is carried out the mouth open configuration judge,, then be judged as fatigue state if magnify state continuously greater than 3 seconds.
5. multi-modal driver fatigue detection method according to claim 1
, it is characterized in that: judge whether to the method for fatigue state in the 5th step to be: on pressure curve, seek singular value, be flat condition, then be judged as fatigue state if having 3 or above pressure curve to surpass 100 seconds.
6. multi-modal driver fatigue detection method according to claim 1
, it is characterized in that: judge whether to the method for fatigue state in the 6th step to be:, judge tired when detecting pulse when slack-off.
7. multi-modal driver fatigue detection method according to claim 1
, it is characterized in that: the fatigue detecting characteristic synthetic analysis with second to six step obtained, obtain the weights of various fatigue factors according to experimental result, and judge tired situation, then in pilothouse, report to the police if produce tired situation.
8. be applied in the described multi-modal driver fatigue detection method of claim 1
In specialized equipment, it is characterized in that: described equipment comprises binary channels vision inspection apparatus, multiple spot pressure-detecting device, physiological signal real-time detection apparatus, warning device and CPU (central processing unit); Described binary channels vision inspection apparatus, multiple spot pressure-detecting device and physiological signal real-time detection apparatus all are connected to CPU (central processing unit), and CPU (central processing unit) connects warning device.
9. multi-modal driver fatigue detection method according to claim 1
In specialized equipment
, it is characterized in that: described binary channels vision inspection apparatus comprises that wide-angle imaging head that position and direction are fixing and position and angle can the three-dimensional high-resolution cameras that moves; The multiple spot pressure-detecting device is the pressure transducer that is arranged on two jiaos on driver's four jiaos of seats and backrest; The physiological signal real-time detection apparatus is a pulse transducer.
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