CN109741484A - Automobile data recorder and its working method with image detection and voice alarm function - Google Patents
Automobile data recorder and its working method with image detection and voice alarm function Download PDFInfo
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Abstract
The invention discloses a kind of automobile data recorder and its working method with image detection and voice alarm function.The automobile data recorder includes main control unit, video acquisition unit, display unit, positioning unit, storage unit, network unit and voice unit；The video acquisition unit, display unit, positioning unit, storage unit, network unit and voice unit are connect with main control unit；Working method are as follows: video acquisition unit identifies the identification information of traffic mark board, and broadcasted by voice unit to main control unit Real-time Feedback vehicle front road traffic condition；Main control unit obtains vehicle position information and real-time speed, calculates with the actual range of front truck and theory α coefficient distance, controls voice unit and issue safety alarm, and the collected video of video acquisition unit is saved in storage unit.The present invention can identify traffic mark board information, judge two vehicles distance and carry out audio alert, reduce the probability that driver is illegal and road traffic accident occurs.
Description
Technical field
It is especially a kind of with image detection and voice alarm function the present invention relates to driving safety ancillary technique field
Automobile data recorder and its working method.
Background technique
Automobile data recorder is provided to various vehicles as a kind of driving ancillary equipment extensively.Automobile data recorder is main at present
Effect be record accident occur when image, restore the scene of the accident, provide evidence for traffic accident, but function is more single,
In terms of being not used to safe early warning.
It, may be because of absent minded or road if not knowing about road traffic condition when driver drives vehicle
The influence of road object of reference and leading vehicle distance is caused to judge by accident, it is illegal so as to cause driver and road traffic accident takes place frequently.
Summary of the invention
The purpose of the present invention is to provide one kind can identify traffic mark board information, judges two vehicles distance and carries out voice
The automobile data recorder and its working method with image detection and voice alarm function of alarm, so that it is illegal to reduce driver
And the probability that road traffic accident occurs.
The technical solution for realizing the aim of the invention is as follows: a kind of driving note with image detection and voice alarm function
Instrument is recorded, the automobile data recorder includes main control unit, video acquisition unit, display unit, positioning unit, storage unit, network
Unit and voice unit；
The video acquisition unit, display unit, positioning unit, storage unit, network unit and voice unit with master
Control unit connection；The video acquisition unit acquires real-time video, and by video signal transmission to main control unit；The master control list
Member carries out identifying processing to collected video；The display unit shows collected video；The positioning unit is to vehicle
Positioned and measured real-time speed；The storage unit saves the real-time video of acquisition, and passes through external equipment for institute
The data of storage are read；Main controller is connected to network by the network unit；Institute's speech units carry out voice broadcast.
Further, the main control unit includes the library OpenCV, and the video of video acquisition unit acquisition can pass through training
BP neural network afterwards identifies the traffic mark board in image, and calculates the reality with front truck by space coordinate transformation algorithm
Border distance.
Further, the positioning unit is GPS and Beidou navigation bimodulus module.
Further, the network unit includes WIFI module, and main control unit is connected to mobile phone hot spot by WIFI module,
Obtain the Weather information of position.
Further, institute's speech units carry out audio alert, including vehicle according to the processing result image of main control unit
Hypervelocity, weather conditions excessively close and position with leading vehicle distance.
A kind of working method of the automobile data recorder with image detection and voice alarm function, comprising the following steps:
Step 1, video acquisition unit captured in real-time vehicle front road traffic condition, by video signal transmission to master control list
Member；Main control unit is connected to network by network unit；
Step 2, main control unit obtains vehicle position information and real-time speed by positioning unit；
Step 3, main control unit receives the video information of video acquisition unit acquisition, carries out image procossing, identifies road
On traffic mark board, identify the content of traffic mark board by BP neural network, control voice unit broadcasts sign board；
Step 4, main control unit detects that whether there is or not vehicles in front, if so, then being calculated by space coordinate transformation algorithm
With the actual range of front truck, and theory α coefficient distance is calculated according to real-time speed, if the actual range of front vehicles is small
In theory α coefficient distance, then controls voice unit and issue safety alarm；
Step 5, main control unit obtains the weather condition of vehicle position by network；
Step 6, video information, weather condition are shown to display unit by main control unit, if there is alarm then controls display
Unit splashette is reminded；
Step 7, the collected video of video acquisition unit is saved in storage unit by main control unit.
Further, image procossing described in step 3, comprising:
Image preprocessing: original image is converted into HSI color space；
Detection: binary conversion treatment is carried out to image based on color, ROI region is obtained, is then determined and marked by shape feature
Know board region；
Identification: the BP neural network as feature vector, after training is recombinated using image pixel and carries out match cognization simultaneously
Sort out, exports result.
Further, the actual range with front truck is calculated, specifically by space coordinate transformation algorithm described in step 4
Are as follows:
Image preprocessing: histogram equalization processing is carried out to image；
It chooses vehicle and assumes domain of the existence: setting adaptive Shadow segmentation threshold value using histogram peak valley analytic approach HVAM,
That is the segmentation threshold on road surface and vehicle bottom shade after the binary image after obtaining Shadow segmentation, is filtered using dynamics to two-value
Change image to be handled, removal interference shade chooses shade of the rectangular degree greater than 0.6 as vehicle and assumes position；
Vehicle assumes area validation: extracting the SURF feature of image, is verified using BOF algorithm；
Ranging: obtaining the inner parameter of camera by Zhang Zhengyou calibration method, find out distortion factor, obtains space coordinate change
Matrix is changed, the image coordinate at vehicle bottom is obtained into actual range by coordinate transform.
Compared with prior art, the present invention its remarkable advantage is: (1) can identify traffic mark board information, reduction is driven
The illegal probability of the person of sailing；(2) it can judge vehicle distances and carry out audio alert, reduce the general of road traffic accident generation
Rate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of automobile data recorder of the present invention with image detection and voice alarm function.
Fig. 2 is the flow chart of the processing method of automobile data recorder of the present invention with image detection and voice alarm function.
Fig. 3 is the identification process figure of traffic signboard in the present invention.
Fig. 4 is the decision flow chart of safe distance in the present invention.
Specific embodiment
Automobile data recorder of the present invention with image detection and voice alarm function, the automobile data recorder includes master control list
Member 10, video acquisition unit 20, display unit 30, positioning unit 40, storage unit 50, network unit 60 and voice unit 70；
The video acquisition unit 20, display unit 30, positioning unit 40, storage unit 50, network unit 60 and voice
Unit 70 is connect with main control unit 10；The video acquisition unit 20 acquires real-time video, and by video signal transmission to leading
Control unit；The main control unit 10 carries out identifying processing to collected video；The display unit 30 shows collected view
Frequently；The positioning unit 40 is positioned to vehicle and is measured real-time speed；The storage unit 50 saves the real-time of acquisition
Video, and read the data stored by external equipment；Main controller is connected to network by the network unit 60；It is described
Voice unit 70 carries out voice broadcast.
Further, the main control unit 10 includes the library OpenCV, and the video that video acquisition unit 20 acquires can pass through
BP neural network after training identifies the traffic mark board in image, and is calculated by space coordinate transformation algorithm and front truck
Actual range.
Further, the positioning unit 40 is GPS and Beidou navigation bimodulus module.
Further, the network unit 60 includes WIFI module, and main control unit 10 is connected to mobile phone by WIFI module
Hot spot obtains the Weather information of position.
Further, institute's speech units 70 carry out audio alert according to the processing result image of main control unit 10, including
Overspeed of vehicle, weather conditions excessively close and position with leading vehicle distance.
A kind of working method of the automobile data recorder with image detection and voice alarm function, comprising the following steps:
Step 1,20 captured in real-time vehicle front road traffic condition of video acquisition unit, by video signal transmission to master control
Unit 10；Main control unit 10 is connected to network by network unit 60；
Step 2, main control unit 10 obtains vehicle position information and real-time speed by positioning unit 40；
Step 3, main control unit 10 receives the video information that video acquisition unit 20 acquires, and carries out image procossing, identifies
Traffic mark board on road identifies the content of traffic mark board, the control casting mark of voice unit 70 by BP neural network
Will board；
Step 4, main control unit 10 detects that whether there is or not vehicles in front, if so, then being calculated by space coordinate transformation algorithm
Out with the actual range of front truck, and theory α coefficient distance is calculated according to real-time speed, if the actual range of front vehicles
Less than theory α coefficient distance, then controls voice unit 70 and issue safety alarm；
Step 5, main control unit 10 obtains the weather condition of vehicle position by network；
Step 6, video information, weather condition are shown to display unit 30 by main control unit 10, if there is alarm then controls
30 splashette of display unit is reminded；
Step 7, the collected video of video acquisition unit 20 is saved in storage unit 50 by main control unit 10.
Further, image procossing described in step 3, comprising:
Image preprocessing: original image is converted into HSI color space；
Detection: binary conversion treatment is carried out to image based on color, ROI region is obtained, is then determined and marked by shape feature
Know board region；
Identification: the BP neural network as feature vector, after training is recombinated using image pixel and carries out match cognization simultaneously
Sort out, exports result.
Further, the actual range with front truck is calculated, specifically by space coordinate transformation algorithm described in step 4
Are as follows:
Image preprocessing: histogram equalization processing is carried out to image；
It chooses vehicle and assumes domain of the existence: setting adaptive Shadow segmentation threshold value using histogram peak valley analytic approach HVAM,
That is the segmentation threshold on road surface and vehicle bottom shade after the binary image after obtaining Shadow segmentation, is filtered using dynamics to two-value
Change image to be handled, removal interference shade chooses shade of the rectangular degree greater than 0.6 as vehicle and assumes position；
Vehicle assumes area validation: extracting the SURF feature of image, is verified using BOF algorithm；
Ranging: obtaining the inner parameter of camera by Zhang Zhengyou calibration method, find out distortion factor, obtains space coordinate change
Matrix is changed, the image coordinate at vehicle bottom is obtained into actual range by coordinate transform.
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
Embodiment
In conjunction with Fig. 1, automobile data recorder of the present invention with image detection and voice alarm function, including main control unit 10,
Video acquisition unit 20, display unit 30, positioning unit 40, storage unit 50, network unit 60 and voice unit 70, the view
Frequency acquisition unit 20, display unit 30, positioning unit 40, storage unit 50, network unit 60 and alarm unit 70 are and master control
Unit 10 connects；The video acquisition unit 20 acquires real-time video, and by video signal transmission to main control unit；The master control
Unit 10 carries out identifying processing to acquired image；The display unit 30 shows collected video；The positioning unit
40 pairs of vehicles are positioned and are measured real-time speed；The storage unit 50 saves the real-time video of acquisition, and by outer
Portion's equipment reads the data stored；Main controller is connected to network by the network unit 60；Institute's speech units 70 carry out
Voice broadcast.
As a kind of specific embodiment, the main control unit 10 contains the library OpenCV, can pass through the BP nerve after training
Network Recognition goes out the traffic mark board in image, at the same by space coordinate transformation and algorithm calculate with front truck it is practical away from
From.
As a kind of specific embodiment, the positioning unit 40 is GPS and Beidou navigation bimodulus module, and the present embodiment is selected
ATGM336H model.
As a kind of specific embodiment, the network unit 60 makes main control unit 10 be connected to mobile phone hot spot by WIFI,
The Weather information of position is obtained, the present embodiment selects ESP8266 model.
As a kind of specific embodiment, institute's speech units 70 carry out voice according to the processing result image of main control unit 10
Alarm, including overspeed of vehicle, weather conditions excessively close and position with leading vehicle distance.
In conjunction with Fig. 2, the working method of automobile data recorder of the present invention with image detection and voice alarm function, including with
Lower step:
Step 1,20 captured in real-time vehicle front situation of video acquisition unit, including roadside traffic sign mark plates and road ahead
Vehicle, and collected signal is transmitted to main control unit 10；Video acquisition unit 20 is equipped with auxiliary infrared light supply, in light
Clearly image can also be acquired back in insufficient situation；Step 2, main control unit 10 is issued to positioning unit 40 and is ordered, and positioning is single
Member 40 carries out conversion process to the GPS signal of acquisition after receiving order, calculates the longitude and latitude and speed in real time of vehicle position
These information, are then sent to main control unit 10 by degree；Step 3, in conjunction with Fig. 3, main control unit 10 is to receiving image information
It being handled, identifies the content of traffic mark board, control voice unit 70 broadcasts sign board, specific as follows:
Step 3.1, after main control unit 10 is to image information is received, original image is converted into HIS color space, is completed
Image preprocessing；
Step 3.2, according to the feature of traffic signboard, the method based on color and shape feature is selected to divide traffic mark
Board realizes detection and positioning to round and rectangle traffic signboard；
Step 3.3, the feature for extracting traffic signboard determines the type of traffic signboard by BP neural network；BP mind
It is that image pixel to be formed as feature vector, by being trained to a large amount of traffic signboard images after recombinating through network；
Step 4, histogram equalization processing is carried out to original image, sets adaptive Shadow segmentation threshold value using HVAM,
That is the segmentation threshold on road surface and vehicle bottom shade after the binary image after obtaining Shadow segmentation, is filtered using dynamics to two-value
Change image to be handled, removal interference shade chooses shade of the rectangular degree greater than 0.6 as vehicle and assumes position；Extract image
SURF feature, verified using BOF algorithm, detection front whether have vehicle, if there is then recording vehicle tail coordinate；
The inner parameter of camera is obtained by Zhang Zhengyou calibration method, finds out distortion factor, obtains space coordinate transformation square
The image coordinate at vehicle bottom is obtained the distance away from this vehicle by coordinate transform by battle array；Main control unit 10 is calculated according to real-time speed
Theory α coefficient distance controls voice unit and issues safe police if the actual range of front vehicles is less than theory α coefficient distance
Report；
Specific theory α coefficient distance calculating method are as follows:
In 100km/h or more, safe distance between vehicles is set as 110m in 100m or more, this example for high speed traveling, i.e. speed；
In 60km/h or more, safe distance between vehicles is numerically equal to instant speed for dispatch driving, i.e. speed；For example, speed
80km/h, safe distance between vehicles 80m；
Middling speed driving, i.e. for speed in 50km/h or so, safe distance between vehicles is not less than 50m, is set as 50m in this example；
Low speed driving, i.e. for speed in 40km/h or less, safe distance between vehicles is not less than 30m, is set as 30m in this example；
The driving of tortoise speed, i.e. for speed in 20km/h or less, safe distance between vehicles is not less than 10m, is set as 10m in this example；
Step 5: main control unit 10 is connected to network by network unit 60, obtains the weather condition of vehicle position.
Step 6: video information, weather condition are shown to display unit 30 by main control unit 10, if there is alarm then controls
30 splashette of display unit is reminded.
Step 7: the collected video of video acquisition unit 20 is saved in storage unit 50 by main control unit 10.
In conclusion the present invention can identify traffic mark board information, the illegal probability of driver is reduced；And it can sentence
Disconnected vehicle distances simultaneously carry out audio alert, reduce the probability of road traffic accident generation.
Claims (8)
1. a kind of automobile data recorder with image detection and voice alarm function, which is characterized in that the automobile data recorder packet
Include main control unit (10), video acquisition unit (20), display unit (30), positioning unit (40), storage unit (50), network list
First (60) and voice unit (70)；
The video acquisition unit (20), display unit (30), positioning unit (40), storage unit (50), network unit (60)
It is connect with main control unit (10) with voice unit (70)；The video acquisition unit (20) acquires real-time video, and by video
Signal is transferred to main control unit；The main control unit (10) carries out identifying processing to collected video；The display unit
(30) collected video is shown；The positioning unit (40) is positioned to vehicle and is measured real-time speed；The storage
Unit (50) saves the real-time video of acquisition, and is read the data stored by external equipment；The network unit
(60) main controller is connected to network；Institute's speech units (70) carry out voice broadcast.
2. the automobile data recorder according to claim 1 with image detection and voice alarm function, which is characterized in that institute
Stating main control unit (10) includes the library OpenCV, and the video of video acquisition unit (20) acquisition can pass through the BP nerve net after training
Network identifies the traffic mark board in image, and calculates the actual range with front truck by space coordinate transformation algorithm.
3. the automobile data recorder according to claim 1 with image detection and voice alarm function, which is characterized in that institute
Stating positioning unit (40) is GPS and Beidou navigation bimodulus module.
4. the automobile data recorder according to claim 1 with image detection and voice alarm function, which is characterized in that institute
Stating network unit (60) includes WIFI module, and main control unit (10) is connected to mobile phone hot spot by WIFI module, and it is in place to obtain institute
The Weather information set.
5. the automobile data recorder according to claim 1 with image detection and voice alarm function, which is characterized in that institute
Speech units (70) carry out audio alert, including overspeed of vehicle and front truck according to the processing result image of main control unit (10)
The weather conditions of hypotelorism and position.
6. a kind of working method of the automobile data recorder with image detection and voice alarm function, which is characterized in that including with
Lower step:
Step 1, video acquisition unit (20) captured in real-time vehicle front road traffic condition, by video signal transmission to master control list
First (10)；Main control unit (10) is connected to network by network unit (60)；
Step 2, main control unit (10) obtains vehicle position information and real-time speed by positioning unit (40)；
Step 3, main control unit (10) receives the video information of video acquisition unit (20) acquisition, carries out image procossing, identifies
Traffic mark board on road identifies the content of traffic mark board, control voice unit (70) casting by BP neural network
Sign board；
Step 4, main control unit (10) detects that whether there is or not vehicles in front, if so, then being calculated by space coordinate transformation algorithm
With the actual range of front truck, and theory α coefficient distance is calculated according to real-time speed, if the actual range of front vehicles is small
In theory α coefficient distance, then controls voice unit (70) and issue safety alarm；
Step 5, main control unit (10) obtains the weather condition of vehicle position by network；
Step 6, video information, weather condition are shown to display unit (30) by main control unit (10), if there is alarm then controls
Display unit (30) splashette is reminded；
Step 7, video acquisition unit (20) collected video is saved in storage unit (50) by main control unit (10).
7. the working method of the automobile data recorder according to claim 6 with image detection and voice alarm function,
It is characterized in that, image procossing described in step 3, comprising:
Image preprocessing: original image is converted into HSI color space；
Detection: binary conversion treatment is carried out to image based on color, ROI region is obtained, Sign Board is then determined by shape feature
Region；
Identification: recombinating the BP neural network progress match cognization as feature vector, after training using image pixel and sort out,
Export result.
8. the working method of the automobile data recorder according to claim 6 with image detection and voice alarm function,
It is characterized in that, by space coordinate transformation algorithm described in step 4, calculates the actual range with front truck, specifically:
Image preprocessing: histogram equalization processing is carried out to image；
It chooses vehicle and assumes domain of the existence: setting adaptive Shadow segmentation threshold value, i.e. road using histogram peak valley analytic approach HVAM
The segmentation threshold in face and vehicle bottom shade after the binary image after obtaining Shadow segmentation, is filtered using dynamics to binary picture
As being handled, removal interference shade chooses shade of the rectangular degree greater than 0.6 as vehicle and assumes position；
Vehicle assumes area validation: extracting the SURF feature of image, is verified using BOF algorithm；
Ranging: the inner parameter of camera is obtained by Zhang Zhengyou calibration method, finds out distortion factor, obtains space coordinate transformation square
The image coordinate at vehicle bottom is obtained actual range by coordinate transform by battle array.
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