KR20130108784A - Apparatus and method for controlling headlight of automobile - Google Patents

Apparatus and method for controlling headlight of automobile Download PDF

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Publication number
KR20130108784A
KR20130108784A KR1020120030508A KR20120030508A KR20130108784A KR 20130108784 A KR20130108784 A KR 20130108784A KR 1020120030508 A KR1020120030508 A KR 1020120030508A KR 20120030508 A KR20120030508 A KR 20120030508A KR 20130108784 A KR20130108784 A KR 20130108784A
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KR
South Korea
Prior art keywords
pedestrian
vehicle
headlight
brightness
headlamp
Prior art date
Application number
KR1020120030508A
Other languages
Korean (ko)
Inventor
윤우한
반규대
윤호섭
이재연
김도형
김재홍
손주찬
윤영우
Original Assignee
한국전자통신연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 한국전자통신연구원 filed Critical 한국전자통신연구원
Priority to KR1020120030508A priority Critical patent/KR20130108784A/en
Publication of KR20130108784A publication Critical patent/KR20130108784A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/0017—Devices integrating an element dedicated to another function
    • B60Q1/0023—Devices integrating an element dedicated to another function the element being a sensor, e.g. distance sensor, camera
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • B60Q1/1415—Dimming circuits
    • B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
    • B60Q1/143—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic combined with another condition, e.g. using vehicle recognition from camera images or activation of wipers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/10—Indexing codes relating to particular vehicle conditions
    • B60Q2300/11—Linear movements of the vehicle
    • B60Q2300/112—Vehicle speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/40—Indexing codes relating to other road users or special conditions
    • B60Q2300/45—Special conditions, e.g. pedestrians, road signs or potential dangers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

An automobile headlight control apparatus and method for automatically adjusting the headlight brightness of a vehicle based on whether a pedestrian is detected by using front image information captured by a front camera installed at the front of a vehicle is provided. The proposed vehicle headlight control device detects pedestrians from the image information of the front of the vehicle and controls the brightness of the headlights according to the detected position and direction of the pedestrians, thereby minimizing inconvenience caused by glare. .

Description

Automotive headlight control device and method {APPARATUS AND METHOD FOR CONTROLLING HEADLIGHT OF AUTOMOBILE}

The present invention relates to a vehicle headlight control apparatus and method, and more particularly to a vehicle headlight control apparatus and method for automatically adjusting the headlight brightness of the vehicle using the front image information of the vehicle.

In general, a headlight of a vehicle is a lighting device used to secure a forward view at night and bad weather driving, and is divided into a low headlight and an upright headlight, and the downlight filament and the high headlight filament are integrated into a single lamp. There is an integrated integrated type and a separate type divided into a lower headlamp lamp and an upper headlamp lamp. The integrated integrated type and the separated type are each equipped with one headlight filament and one headlight filament in one lamp, and a simple method of irradiating light with a fixed brightness and a fixed up / down irradiation angle by a driver's switch operation. On / off is made.

Headlights are designed to meet the KS (Korea Standard) standards and automotive safety standards. The brightness of the beam is from 15000 cd (candela) up to 125000 cd. It is regulated to have brightness of up to 120000cd, and according to the automobile dimming safety standard law, the longest dimming distance requires that the downward beam should be projected within 10m within 15m ahead, so that obstacles within the range should be observed and confirmed.

The headlights were initially assembled with a lens, a light bulb, and a reflector, but recently, a shield beam light bulb having a monolithic structure is mainly used, and a headlight or a headlight or a headlight is separately separated. One pair is provided on the left and right sides. The headlight integrated headlight includes a headlamp filament and a headlamp filament used in the headlight of a conventional vehicle in one lamp.

Headlamp lamps use alloy filaments containing tungsten and molybdenum as the main materials and low-resistance metals for the purpose of reducing the load on the heating element to prevent power loss while increasing brightness and suppressing the oxidation of the filament to prolong its life. In recent years, the sealing of the space layer between the filament and the outer glass wall only with a vacuum layer has recently increased the load resistance of the current by increasing the load resistance of the current by injecting a replacement gas into the vacuum layer, thereby greatly increasing the irradiation light.

The headlights of the vehicle are both integrated beams and separate split beams for opposing beams (no glare on the car facing the beams downward, downward angle headlights) and driving beams (the beams are horizontal to the road surface, allowing for far-field illumination). (Or horizontal angle) headlights) are designed and shipped together.

According to the automobile illuminance safety standard law, the headlights of a conventional vehicle have an illumination intensity difference of 10 times or more according to the model and the design performance of the vehicle, and it is possible to easily recognize the presence or movement of obstacles in a good weather condition on the road. It is designed to irradiate a fixed irradiation angle with a uniform fixed brightness on the premise of a good driver's night vision. Accordingly, the headlight driving device of the vehicle is configured to irradiate only the opposite beam or the upward angle to irradiate the downward angle according to the operation of the driver's headlight switch, or to selectively operate the traveling beam to simultaneously irradiate the downward and upward angles. .

As described above, the headlamp performs an important function for night driving safety of the vehicle. Accordingly, various headlight control technologies have been developed for efficient operation of the headlight, such as driver's driving convenience and safe driving. For example, in Korean Patent Laid-Open Publication No. 10-2011-0057836 (name: variable headlight system that implements the highway and city mode of the vehicle headlight), the headlights are moved up and down according to the driving conditions of the vehicle (vehicle speed, external illumination, number of stops, etc.). To control.

However, the conventional headlights help to drive safely by brightening the front at night from the driver's point of view, but there is a problem in that the pedestrian located in front of the vehicle feels uncomfortable due to glare.

The present invention has been proposed to solve the above problems, the vehicle headlight control device to automatically adjust the headlight brightness of the vehicle based on whether the pedestrian detection using the front image information captured by the front camera installed in the front of the vehicle And to provide a method.

In order to achieve the above object, a vehicle headlight control apparatus according to an embodiment of the present invention, a pedestrian detection unit for detecting the front and front face of the pedestrian from the image information photographed in front of the vehicle; A determination setting unit determining whether a pedestrian in front of the vehicle is present on the basis of the detected whole body and front face of the pedestrian and the current driving speed of the vehicle, and setting the brightness value of the headlight to taillight if the pedestrian exists; And a controller for controlling the brightness of the headlamp according to the set brightness value.

The determination setting unit sets the brightness value of the headlamp to the tail light when the current traveling speed is equal to or less than the traveling speed set value, the front face of the pedestrian is detected from the video information, and the size of the detected pedestrian is larger than the size set value.

The determination setting unit sets the brightness value of the headlamp to the tail light when the current traveling speed is equal to or less than the traveling speed set value and the detected pedestrian is larger than or equal to the size set value.

The apparatus may further include an image input unit configured to receive image information from the front camera.

The apparatus may further include a driving information input unit configured to receive a current driving speed of the vehicle.

In order to achieve the above object, a vehicle headlight control method according to an exemplary embodiment of the present invention includes: receiving image information from a front camera of a vehicle by an image input unit; Detecting, by the pedestrian detector, pedestrians from the image information; Receiving, by the driving information input unit, a current driving speed of the vehicle; And controlling, by the determination setting unit and the control unit, brightness of the headlamp based on the pedestrian detection information and the current traveling speed.

The controlling of the brightness of the headlamp may include: comparing, by the determination setting unit, a current traveling speed and a traveling speed set value; Determining whether the front face is detected by the determination setting unit; Comparing, by the determination setting unit, the size and the size setting value of the pedestrian; And controlling the headlight brightness by setting the brightness value of the headlight to tail light when the current driving speed is equal to or less than the traveling speed set value, and the front face of the pedestrian is detected from the image information, and the size of the detected pedestrian is larger than the size set value. Include.

The controlling of the brightness of the headlamp may include: comparing, by the determination setting unit, a current traveling speed and a traveling speed set value; Comparing, by the determination setting unit, the size and the size setting value of the pedestrian; And controlling the headlight brightness by setting the brightness value of the headlamp to the taillight when the current traveling speed is less than or equal to the traveling speed set value and the size of the detected pedestrian is greater than or equal to the size set value.

The detecting of the pedestrian may include detecting, by the pedestrian detector, a whole body of the pedestrian from the image information; Detecting, by the pedestrian detector, the front face of the pedestrian from the image information; And transmitting, by the pedestrian detection unit, the detected pedestrian whole body and the front face to the decision setting unit.

In the detecting of the whole body of the pedestrian, the whole body including the size and position of the pedestrian in the image information is detected by the pedestrian detection unit.

According to the present invention, the vehicle headlight control apparatus and method has the effect of minimizing the discomfort (ie, glare) that the pedestrian feels by the headlight by controlling the brightness of the headlight based on the image information and the driving speed.

In addition, the vehicle headlight control apparatus and method can provide a comfortable walking environment for pedestrians by controlling the brightness of the headlight through an inexpensive front camera.

1 is a view for explaining a vehicle headlight control apparatus according to an embodiment of the present invention.
2 is a view for explaining the configuration of the vehicle headlight control device of FIG.
3 is a view for explaining a pedestrian detector of FIG.
4 is a flowchart illustrating a vehicle headlight control method according to an exemplary embodiment of the present invention.
5 is a flowchart for explaining a pedestrian detection step of FIG. 4.
6 and 7 are flow charts for explaining the headlight brightness control step of FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention. . In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Hereinafter, a vehicle headlight control apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. 1 is a view for explaining a vehicle headlight control apparatus according to an embodiment of the present invention, Figure 2 is a view for explaining the configuration of the vehicle headlight control device of Figure 1, Figure 3 is a description of the pedestrian detection unit of FIG. It is a figure for following.

As shown in FIG. 1, the vehicle headlight control apparatus 200 is installed in the vehicle 100. At this time, the vehicle headlight control device 200 is connected to the ECU 300, the front camera 400, the headlight 500 installed in the vehicle 100 so as to enable transmission and reception of data. Here, the vehicle headlight control device 200 may be connected by CAN communication used for data communication between devices installed in the vehicle 100.

ECU 300 is a device for monitoring and controlling the state of the engine, automatic transmission, ABS and the like of the vehicle 100. The ECU 300 performs control of a driving system, a braking system, a steering system, and the like of the vehicle 100. At this time, the ECU 300 detects the current traveling speed of the vehicle 100 and transmits it to the vehicle headlight control apparatus 200.

The front camera 400 is installed at the front of the vehicle 100 to obtain image information by photographing the driving direction of the vehicle 100. That is, the front camera 400 is installed at a position where the front surface of the vehicle 100 can be photographed, such as the vehicle 100 grille and the headlight side. The front camera 400 transmits the image information obtained by photographing the front of the vehicle 100 to the vehicle headlight control apparatus 200.

The vehicle headlight control apparatus 200 detects a pedestrian located in front of the vehicle 100 based on the image information photographed by the front camera 400 and the traveling speed received from the ECU 300. The vehicle headlight control apparatus 200 controls the brightness of the conduction lamp according to whether the pedestrian is detected. Of course, the vehicle headlight control apparatus 200 may control the irradiation angle of the conduction light according to whether the pedestrian is detected. To this end, as shown in FIG. 2, the vehicle headlight control apparatus 200 includes an image input unit 210, a pedestrian detector 230, a driving information input unit 250, a determination setting unit 270, and a controller 290. It is configured to include.

The image input unit 210 receives image information from the front camera 400. That is, the image input unit 210 receives image information captured by one or more front cameras 400 installed in the vehicle 100.

The pedestrian detector 230 detects a pedestrian from the image information input through the image input unit 210. At this time, the pedestrian detector 230 detects a pedestrian's entire body, a pedestrian's face, and the like from the image information. To this end, as shown in FIG. 3, the pedestrian detector 230 includes a whole body detector 232 and a face detector 234.

The whole body detection unit 232 detects the whole body of the pedestrian from the image information. The whole body detection unit 232 detects the whole body of the pedestrian from the image information using image processing and pattern recognition methods. At this time, the whole body detection unit 232 detects the whole body of the pedestrian by using a user detection method based on a histogram of oriented gradient-supported vector machine (HOG-SVM). Through this, the whole body detection unit 232 detects the position and size of the pedestrian in the image. The whole body detection unit 232 transmits the detected position and size of the pedestrian to the determination setting unit 270.

The face detector 234 detects the front face of the pedestrian from the image information. The face detector 234 detects the face of the pedestrian who is looking at the vehicle 100 from the pedestrians by using the image processing and the pattern recognition method. At this time, the face detector 234 detects the front face of the pedestrian by using an Adaboost (Adaptive Boosting Algorism) based front face detection method. In this way, the face detector 234 detects the face of the pedestrian moving toward the stop or the vehicle 100.

The driving information input unit 250 receives the current driving speed of the vehicle 100. That is, the driving information input unit 250 receives the current driving speed of the vehicle 100 from the ECU (300). Here, the driving information input unit 250 may receive the current driving speed from a device capable of detecting the current driving speed of the vehicle 100 in addition to the ECU 300.

The determination setting unit 270 sets the brightness of the headlamp 500 based on the entire pedestrian and front face detected by the pedestrian detector 230, and the current traveling speed from the driving information input unit 250. That is, the determination setting unit 270 sets the brightness of the headlamp 500 based on the current driving speed, the position and size of the pedestrian, and whether the front face is detected. In this case, the determination setting unit 270 sets the brightness of the headlamp 500 only when the current traveling speed of the vehicle 100 is less than or equal to the traveling speed set value. For example, when the driving speed set value is set to 20 km / h, the determination setting unit 270 when the current driving speed of 20 km / h or less from the driving information input unit 250 is input, the position, size, front of the pedestrian The brightness of the headlamp 500 is set based on whether the face is detected. The determination setting unit 270 does not set the brightness of the headlamp 500 when a current driving speed of more than 20 km / h is input from the driving information input unit 250.

The determination setting unit 270 sets the brightness of the headlamp 500 based on the size of the pedestrian and whether the front face is detected. At this time, the determination setting unit 270 sets the headlight 500 to the taillight when the front face is present among the pedestrians included in the image information and the size of the pedestrian is larger than the size setting value. That is, the determination setting unit 270 determines that the pedestrian feels glare by the headlight 500 when the size of the pedestrian is greater than or equal to the size setting value, and sets the brightness value of the headlight 500 as low.

The determination setting unit 270 may set the brightness of the headlamp 500 based on the presence of the pedestrian and the size of the pedestrian. In this case, the determination setting unit 270 sets the headlight 500 to the tail light when the pedestrian is present and the size of the pedestrian is greater than or equal to the size setting value. That is, when the size of the pedestrian is larger than the size setting value, the determination setting unit 270 determines that the pedestrian feels glare when the pedestrian is turned, and sets the tail light having a low brightness value of the headlamp 500.

The determination setting unit 270 does not set the brightness of the headlamp 500 when the front face does not exist among the pedestrians included in the image information or the size of the pedestrian is less than the size setting value. That is, the determination setting unit 270 determines that the pedestrian does not feel glare when the front face does not exist or the size of the pedestrian is less than the size setting value and does not set the brightness value of the headlamp 500.

The controller 290 controls the brightness of the headlamp 500 based on the determination result of the determination setting unit 270. That is, the controller 290 generates a control signal for controlling the brightness of the headlamp 500 based on the brightness value of the headlamp 500 set by the determination setting unit 270. The control unit 290 transmits the generated control signal to the headlight 500 driving device (not shown) to control the brightness of the headlight 500 to a predetermined brightness value of the headlight 500.

Hereinafter, the vehicle 100 headlight 500 control method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. 4 is a flowchart illustrating a method for controlling the headlight 500 of the vehicle 100 according to an exemplary embodiment of the present invention. FIG. 5 is a flowchart illustrating the pedestrian detection step of FIG. 4, and FIGS. 6 and 7 are flowcharts illustrating the brightness control step of the headlamp 500 of FIG. 4.

First, the image input unit 210 receives the image information captured by the front camera 400 (S100). That is, the image input unit 210 receives image information about the front of the vehicle 100 (that is, the driving direction of the vehicle 100) from at least one front camera 400 installed in the vehicle 100. The image input unit 210 transmits the input image information to the pedestrian detector 230.

The pedestrian detector 230 detects a pedestrian from the image information input from the image input unit 210 (S200). At this time, the pedestrian detector 230 detects the whole body and the front face of the pedestrian. This will be described in more detail with reference to FIG. 5.

The whole body detection unit 232 detects the whole body of the pedestrian from the image information (S220). That is, the whole body detection unit 232 detects the whole body of the pedestrian from the image information by using image processing and pattern recognition method. To this end, the whole body detection unit 232 detects the whole body of the pedestrian using a HOG-SVM-based user detection method. At this time, the whole body detection unit 232 detects the position and size of the pedestrian in the image.

The face detector 234 detects the front face of the pedestrian from the image information (S240). That is, the face detector 234 detects the face of the pedestrian who is looking at the vehicle 100 among the pedestrians by using the image processing and the pattern recognition method from the image information. In this case, the face detector 234 detects the front face of the pedestrian by using an Adaboost-based front face detection method. In this way, the face detector 234 detects the face of the pedestrian moving toward the stop or the vehicle 100.

The whole body detector 232 transmits the detected body and the size of the detected pedestrian to the decision setter 270, and the face detector 234 transmits the detected front face to the decision setter 270. (S260).

The driving information input unit 250 receives the current driving speed of the vehicle 100 (S300). That is, the driving information input unit 250 receives the current driving speed of the vehicle 100 from the ECU (300). Here, the driving information input unit 250 may receive the current driving speed from a device capable of detecting the current driving speed of the vehicle 100 in addition to the ECU 300.

The determination setting unit 270 sets the brightness value of the headlamp 500 based on the pedestrian detection information and the current traveling speed. The controller 290 controls the brightness of the headlamp 500 according to the set brightness value of the headlamp 500 (S400). That is, the controller 290 controls the brightness of the headlamp 500 based on the entire pedestrian (ie, the location and size of the pedestrian) and the front face and the current traveling speed detected from the image information.

In this case, as shown in FIG. 6, if the current traveling speed is less than or equal to the traveling speed set value (S422; YES), the front face is detected from the image information (S424; YES), and if the size of the pedestrian is greater than or equal to the size set value (S422; YES). S426; Yes), the determination setting unit 270 sets the brightness value of the headlamp 500 to the taillight. That is, the determination setting unit 270 determines that the pedestrian feels glare by the headlight 500 when the size of the pedestrian is greater than or equal to the size setting value, and sets the brightness value of the headlight 500 as low. Accordingly, the control unit 290 controls the headlamp 500 to the taillight according to the set brightness value to control the brightness of the headlamp 500 (S428).

Of course, as shown in FIG. 7, the headlamp 500 may be controlled as a taillight regardless of whether the front face is detected. That is, if the current driving speed is less than the driving speed set value (S442; Yes), and if the size of the pedestrian is larger than the size set value (S444; Yes), the determination setting unit 270 sets the brightness value of the headlamp 500 to taillight. Set it. This means that if the size of the pedestrian is greater than or equal to the size set value, it is determined that the pedestrian feels glare when the pedestrian is turned to set the taillight of the headlight 500 having a low brightness value. Accordingly, the controller 290 controls the headlamp 500 to the taillight according to the set brightness value to control the brightness of the headlamp 500 (S446).

As described above, according to the present invention, the vehicle headlight control apparatus 200 and the method control the brightness of the headlamp 500 based on the image information and the driving speed, thereby making the pedestrian feel uncomfortable by the headlamp 500 ( That is, there is an effect that can minimize the glare).

In addition, the vehicle headlight control apparatus 200 and the method may provide a comfortable walking environment for pedestrians by controlling the brightness of the headlight 500 through the inexpensive front camera 400.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but many variations and modifications may be made without departing from the scope of the present invention. It will be understood that the invention may be practiced.

100: car 200: car headlight control device
210: Image input unit 230: Pedestrian detector
232: whole body detection unit 234: face detection unit
250: driving information input unit 270: determination setting unit
290: control unit 300: ECU
400: front camera 500: headlight

Claims (1)

A pedestrian detector configured to detect the whole body and the front face of the pedestrian from the image information photographing the front of the vehicle;
A determination setting unit for determining whether a pedestrian in front of the vehicle is present based on the detected whole body and front face of the pedestrian and the current traveling speed of the vehicle, and setting the brightness value of the headlight to taillight if the pedestrian exists; And
And a controller for controlling the brightness of the headlamp according to the set brightness value.
KR1020120030508A 2012-03-26 2012-03-26 Apparatus and method for controlling headlight of automobile KR20130108784A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160050136A (en) * 2014-10-28 2016-05-11 현대모비스 주식회사 Control apparatus and method for daytime running lamp
KR20220159636A (en) 2021-05-26 2022-12-05 주식회사 차이코 A headlight for vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160050136A (en) * 2014-10-28 2016-05-11 현대모비스 주식회사 Control apparatus and method for daytime running lamp
KR20220159636A (en) 2021-05-26 2022-12-05 주식회사 차이코 A headlight for vehicle

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