KR101686244B1 - Accident record apparatus for the use of a vehicle to recognize day and night and accident record method of the same - Google Patents

Abstract

The present invention relates to a vehicle accident recording apparatus and method for recognizing a daytime and a nighttime, wherein the vehicle accident recording apparatus is provided at each of the front and rear of the vehicle so as to photograph the periphery of the vehicle, A plurality of photographing units each outputting an image; A plurality of impact detection sensors respectively installed on the front and rear bumper of the vehicle and on the sides of the vehicle to detect an external impact and output respective detection values; A memory for storing a color image or an infrared image; And an operation of the memory, and judges whether it is daytime or nighttime based on the luminance values of the color image received from any one of the plurality of photographing units, recognizes occurrence of an accident based on the sensed values, And a controller for storing the color image in the memory when the viewpoint is the daytime and storing the infrared image in the memory at the time of the occurrence of the accident at the time of night. When the controller determines whether it is daytime or nighttime, When the value of the average luminance value is larger than the first threshold value and the absolute value of the variation amount of the average luminance value during the set time is smaller than a predetermined second threshold value When they are the same, they are identified as daytime. Therefore, it is possible to record a color image in the daytime and an infrared image in the nighttime by judging whether the time of occurrence of the accident is daytime or nighttime, so that a clear accident image can be recorded.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vehicle accident recorder for recognizing a day and a night, and an accident recorder for the same.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to recording of an accident image, and more particularly, to an accident recording apparatus for a vehicle and an accident recording method thereof.

BACKGROUND ART [0002] In recent years, a vehicle is provided with a video recording apparatus for recording a video around a vehicle at the time of a traffic accident. The video recorded on the video recorder will help the accident analyst to identify the cause of the traffic accident in the future. However, since the conventional image recording apparatus stores only images taken by a general color camera without discriminating whether the time of the occurrence of the traffic accident is daytime or nighttime, it is necessary to secure a clear image for accidents occurring during nighttime or tunnel traveling it's difficult. As a result, there is a limit in analyzing an accident video recorded at night by the conventional video recording apparatus.

SUMMARY OF THE INVENTION [0008] Accordingly, an object of the present invention is to provide a vehicle accident recording apparatus capable of recording a clear accident image by storing a color image during a day and an infrared image during a night, by recognizing day and night at the time of an accident have.

Another object of the present invention is to provide an accident recording method of a vehicle accident recording apparatus capable of recording a color accident image by storing a color image during a day while recognizing day and night at the time of an accident and storing an infrared image at night .

According to an aspect of the present invention, there is provided an accident recording apparatus for a vehicle, comprising: a plurality of cameras arranged in front of and behind a vehicle for photographing a periphery of the vehicle, respectively, and outputting a color image and an infrared image, respectively, A photographing unit; A plurality of impact detection sensors respectively installed on the front and rear bumper of the vehicle and on the sides of the vehicle to detect an external impact and output respective detection values; A memory for storing the color image or the infrared image; And a control unit for controlling the operation of the memory and determining whether it is a day or night based on the luminance values of the color image received from any one of the plurality of photographing units, And a control unit for storing the color image in the memory when the occurrence time of the accident is the week and storing the infrared image in the memory when the occurrence time of the accident is at night, And identifies that the average brightness value obtained by averaging the brightness values is less than a predetermined first threshold value, and determines that the average brightness value is greater than the first threshold value and that the absolute value of the variation amount of the average brightness value When the value is less than or equal to the preset second threshold value, it is identified as the daytime.

According to another aspect of the present invention, there is provided an accident recording method for an accident recording apparatus for a vehicle, the method comprising: recording an average luminance value on the basis of a color image received from any one of a plurality of photographing units, Obtaining; Identifying a day and a night based on the average luminance value; Storing a color image before and after an occurrence of an accident received from the plurality of photographing units in a memory when an accident occurs during a week; And storing an infrared image before and after the occurrence of an accident received from the plurality of photographing units in the memory when an accident occurs during the nighttime, wherein, in the step of identifying the daytime and the nighttime, And when the average luminance value is larger than the first threshold value and the absolute value of the variation amount of the average luminance value during the set time is smaller than a preset second threshold value When they are the same, they are identified as being weekly.

As described above, the vehicle accident recording apparatus and the accident recording method according to the present invention determine whether an accident occurred at day or night, store color images during the day, and store infrared images at night, can do.

1 is a block diagram schematically showing an accident recording apparatus for a vehicle according to an embodiment of the present invention.
2 is a flowchart showing an operation procedure of the vehicle accident recording apparatus shown in FIG.
3A is a graph showing an example of luminance values extracted in step 1004 shown in FIG.
3B is a graph showing an example of the luminance values filtered in step 1005 shown in FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limiting the scope of the invention to those skilled in the art It is provided to let you know completely.

1 is a block diagram schematically showing an accident recording apparatus for a vehicle according to an embodiment of the present invention. For simplification of the drawing, only the parts related to the present invention are shown in Fig. 1, and the illustration of the transmission / reception signals between the respective components is omitted. The vehicle accident recording apparatus 100 includes a plurality of photographing units C1 to CK (K is an integer), a plurality of shock detection sensors S1 to SN (N is an integer), a controller (e.g., an electronic control unit ) 120, a memory 130, an ignition key input signal generating device 140, and an external interface device 150.

The plurality of photographing units C1 to CK are installed respectively in front and rear of the vehicle to photograph the periphery of the vehicle and output a color image and an infrared image according to the photographing result, respectively. For example, the plurality of photographing units C1 to CK may be installed in a room mirror of a vehicle and a rear window of a vehicle, respectively.

Each of the plurality of photographing units C1 to CK includes a color camera 111 and an infrared camera 112. [ The color camera 111 photographs the periphery of the vehicle and outputs the color image CLIMG to the control unit 120 according to the photographing result. The infrared camera 112 photographs the periphery of the vehicle and outputs the infrared image IFIMG to the control unit 120 according to the photographing result.

The plurality of impact sensors S1 to SN are respectively installed on the front and rear bumpers of the vehicle and on the sides of the vehicle to detect an external impact and output the sensed values SEN1 to SENN to the controller 120 . Each of the plurality of shock sensors S1 to SN may include at least one of a two-axis acceleration sensor, a three-axis acceleration sensor, and a gravity acceleration sensor. In this case, each of the two-axis acceleration sensor, the three-axis acceleration sensor, and the gravity acceleration sensor senses the acceleration of the vehicle and outputs the acceleration value as one of the sensed values SEN1 to SENN. Each of the plurality of shock sensors S1 to SN may include a gyro sensor that senses the tilting of the vehicle and outputs an angular velocity value according to the detection result as one of the sensed values SEN1 to SENN have.

The control unit 120 controls the operation of the memory 130. The control unit 120 determines whether it is daytime or nighttime based on the luminance values of the color image CLIMG received from any one of the plurality of photographing units C1 to CK. The control unit 120 recognizes whether or not an accident has occurred based on the sensing values SEN1 to SENN received from the plurality of impact sensors S1 to SN. The control unit 120 stores the color image CLIMG in the memory 130 when the occurrence time of the accident is the week and stores the infrared image IFIMG in the memory 130 when the incident occurs at night.

The memory 130 stores a color image CLIMG or an infrared image IFIMG under the control of the controller 120. [ The ignition key input signal generator 140 outputs the ignition key-on signal IGON or the ignition key-off signal IGOFF to the control unit 120 according to the input state of the vehicle ignition key. The control unit 120 outputs the photographing start signal STSIG to the plurality of photographing units C1 to CK in response to the ignition key on signal IGON and outputs the photographing end signal EDSIG) to the plurality of photographing units C1 to CK, respectively. Each of the plurality of photographing units C1 to CK is turned on in response to the photographing start signal STSIG and is turned off in response to the photographing end signal EDSIG.

The external interface device 150 interfaces communication between the external device (not shown) and the control unit 120. The external device may be, for example, a personal computer (PC) or an external memory. In this case, the external device is connected to the external interface device 150 via a universal serial bus (USB) port, and communicates with the control unit 120 to receive an accident recording image (i.e., a color image or an infrared image) .

Next, the operation process of the vehicle accident recording apparatus 100 will be described in more detail with reference to FIG. 2 is a flowchart showing an operation procedure of the vehicle accident recording apparatus shown in FIG.

The controller 120 determines whether the ignition key of the vehicle is turned on or not based on whether the ignition key signal IGON is input from the ignition key input signal generator 140 (step 1001). When it is determined that the ignition key of the vehicle is turned on, the control unit 120 outputs the photographing start signal STSIG to each of the plurality of photographing units C1 to CK to turn on the power of the plurality of photographing units C1 to CK (Step 1002).

The control unit 120 receives the color images CLIMG1 to CLIMGK taken by the plurality of photographing units C1 to CK (step 1003). The control unit 120 extracts luminance values from the color image (one of CLIMG1 to CLIMGK) (step 1004). 3A is a graph showing an example of extracted luminance values. 3A shows luminance values extracted from the color image photographed at night, and the points indicated by the arrows P2 and P4 are photographed when the vehicle is traveling in an area that is temporarily lit by external light such as a street lamp The points corresponding to the luminance values of the image and indicated by the arrows P1, P3, and P5 correspond to the luminance values of the images photographed when the vehicle travels in a dark area.

Here, the selection information of the color image for luminance value extraction may be preset in the control unit 120. [ For example, the color image CLIMG1 photographed by the photographing section C1 can be set as a color image for luminance value extraction.

Thereafter, the controller 120 filters the extracted luminance values using a low-pass filtering program (step 1005). 3B is a graph showing an example of the filtered luminance values. As can be seen from the graph shown in FIG. 3B, when the luminance value is filtered by the low-pass filtering program, the luminance value rises sharply when the vehicle travels in an area temporarily lit by external light such as a streetlight Parts can be excluded. Accordingly, the control unit 120 can more accurately determine the daytime and the nighttime.

)을 계산한다(단계 1006). 평균 휘도값(

)에서, "f"는 필터링된 것을 의미하고, "t"는 특정 시점을 의미한다.The controller 120 calculates the average luminance value of the filtered luminance values (

(Step 1006). Average luminance value (

), "F" means filtered, and "t" means a specific point in time.

)이 임계값(T1)보다 큰지의 여부를 판단함으로써, 주간인지 야간인지를 판단한다(단계 1007). 평균 휘도값(

)이 미리 설정된 임계값(T1)보다 클 때, 제어부(120)는 주간인 것으로 1차 판단한다. 임계값(T1)은 저역 통과 필터링 과정이 적용된 비교 기준 휘도값에 해당한다.The control unit 120 calculates the average luminance value (

) Is greater than the threshold value T1, it is determined whether it is daytime or nighttime (step 1007). Average luminance value (

Is greater than a predetermined threshold value T1, the control unit 120 makes a primary determination that it is a daytime. The threshold value T1 corresponds to the comparison reference luminance value to which the low-pass filtering process is applied.

However, even during the night, some areas may be bright due to external illumination. Therefore, in order to exclude this case, the control unit 120 executes step 1008 to determine whether it is daytime or not by a second order.

)이 미리 설정된 임계값(T2)보다 작거나 같은지를 판단한다. 임계값(T2)은 저역 통과 필터링 과정이 적용된 비교 기준 휘도차값에 해당한다.In step 1008, the controller 120 determines whether the absolute value of the variation of the average luminance value during the set time

Is smaller than or equal to a predetermined threshold value T2. The threshold value T2 corresponds to the comparison reference luminance difference value to which the low pass filtering process is applied.

)이 미리 설정된 임계값(T2)보다 작거나 같을 때, 제어부(120)는 주간인 것으로 인식한다.The absolute value of the variation amount of the average luminance value during the set time

Is smaller than or equal to a preset threshold value T2, the control unit 120 recognizes that the day is the daytime.

)이 미리 설정된 임계값(T2)보다 클 때, 제어부(120)는 주간이 아닌 것으로 판단하고, 단계 1003 내지 단계 1007의 동작을 반복한다.The absolute value of the variation amount of the average luminance value during the set time

Is larger than the predetermined threshold value T2, the control unit 120 determines that it is not a daytime period, and repeats the operations from step 1003 to step 1007.

The controller 120 selects and temporarily stores the color images CLIMG1 to CLIMGK photographed by the plurality of photographing units C1 to CK (step 1009). The control unit 120 may include a data buffer (not shown) for temporarily storing the color image.

Thereafter, the control unit 120 receives the sensed values SEN1 to SENN from the plurality of shock sensors S1 to SN (step 1010). The control unit 120 determines whether an accident has occurred by determining whether the sensed value SEN1 to SENN is greater than or equal to a preset reference value T3 (step 1011). The controller 120 may compare the sensed values SEN1 to SENN one by one to the reference value T3 in step 1011. [

When any one of the sensing values SEN1 to SENN is greater than or equal to a preset reference value T3, the control unit 120 determines that an accident has occurred. When any one of the sensed values SEN1 to SENN is smaller than the preset reference value T3, the control unit 120 determines that no accident has occurred and repeats the operations from step 1003 to step 1007.

In step 1011, when it is determined that an accident has occurred, the control unit 120 stores the color images CLIMG1 to CLIMGK temporarily stored in step 1009 and the color images CLIMG1 to CLKG received from the plurality of photographing units C1 to CK, CLIMGK 'in the memory 130 (step 1012). That is, the controller 120 stores the color image before and after the accident in the memory 130 in step 1012.

)이 임계값(T1)보다 작은 것으로 판단될 때(즉, 주간으로 판단될 때), 제어부(120)는 복수의 촬영부(C1∼CK)로부터 수신되는 적외선 영상(IFIMG1∼IFIMGK)을 선택하여 일시적으로 저장한다(단계 1013).On the other hand, in step 1007, the average luminance value (

The control unit 120 selects the infrared images IFIMG1 to IFIMGK received from the plurality of photographing units C1 to CK (i.e., And temporarily stores it (step 1013).

Thereafter, the control unit 120 receives the sensed values SEN1 to SENN from the plurality of impact sensors S1 to SN (step 1014). The control unit 120 determines whether or not an accident has occurred by determining whether the sensed value SEN1 to SENN is greater than or equal to a preset reference value T3 (step 1015). The controller 120 may compare the sensed values SEN1 to SENN one by one to the reference value T3 in step 1015. [

When any one of the sensing values SEN1 to SENN is greater than or equal to a preset reference value T3, the control unit 120 determines that an accident has occurred. When any one of the sensed values SEN1 to SENN is smaller than the preset reference value T3, the control unit 120 determines that no accident has occurred and repeats the operations from step 1003 to step 1007.

In step 1015, when it is determined that an accident has occurred, the control unit 120 stores the infrared images IFIMG1 to IFIMGK temporarily stored in step 1013 and the infrared images IFIMG1 'to IFIMG1' received from the plurality of photographing units C1 to CK IFIMGK ') in the memory 130 (step 1016). That is, the controller 120 stores the infrared image before and after the incident in the memory 130 in step 1016.

After step 1012 or step 1016, the control unit 120 determines whether or not the ignition key of the vehicle is turned off depending on whether or not the ignition key off signal IGOFF is inputted from the ignition key input signal generating apparatus 140 Step 1017). When it is determined that the ignition key of the vehicle is turned off, the control unit 120 outputs the photographing end signal EDSIG to each of the plurality of photographing units C1 to CK to turn off the power of the plurality of photographing units C1 to CK (Step 1018).

As described above, the vehicle accident recording apparatus 100 records a color image before and after an accident when a vehicle accident occurs, and records an infrared image before and after an accident when the vehicle accident occurs at night. .

The embodiments described above are for illustrating the present invention and the present invention is not limited to these embodiments, and various embodiments are possible within the scope of the present invention. Also, although not illustrated, equivalent means are also incorporated into the present invention as such. Therefore, the true scope of protection of the present invention should be defined by the following claims.

100: vehicle accident recording device C1 to CK:
S1 to SN: Shock sensor 120:
130: memory 140: ignition key input signal generating device
150: External interface device

Claims (8)

A plurality of photographing units respectively installed at the front and rear of the vehicle for photographing the periphery of the vehicle and outputting a color image and an infrared image according to the photographing result;
A plurality of impact detection sensors respectively installed on the front and rear bumper of the vehicle and on the sides of the vehicle to detect an external impact and output respective detection values;
A memory for storing the color image or the infrared image; And
And a control unit for controlling the operation of the memory and determining whether a day or night is present based on the luminance values of the color image received from one of the plurality of photographing units, And a controller for storing the color image in the memory when the occurrence of an accident occurs during a week and storing the infrared image in the memory when an accident occurs at night,
Wherein the control unit identifies that the average luminance value obtained by averaging the luminance values is a nighttime when the luminance value is less than a preset first threshold value and determines that the average luminance value is greater than the first threshold value When the absolute value of the variation amount of the average luminance value during the set time is less than or equal to a preset second threshold value. Obtaining an average luminance value based on a color image received from any one of a plurality of photographing units provided respectively in front and rear of a vehicle;
Identifying a day and a night based on the average luminance value;
Storing a color image before and after an occurrence of an accident received from the plurality of photographing units in a memory when an accident occurs during a week; And
And storing infrared images before and after the occurrence of an accident received from the plurality of photographing units in the memory when an accident occurs during nighttime,
And identifying the nighttime when the average luminance value is less than a predetermined first threshold value, identifying the nighttime when the average luminance value is greater than the first threshold value, And when the absolute value of the amount of change of the value is less than or equal to a predetermined second threshold value, it is identified as the day of the accident. 3. The method of claim 2,
Turning on the plurality of photographing sections when the ignition key of the vehicle is turned on before acquiring the average luminance value; And
Further comprising the step of turning off the power of the plurality of photographing units when the ignition key of the vehicle is turned off after storing the color image or the infrared image in the memory. 3. The method of claim 2, wherein obtaining the average luminance value comprises:
Extracting luminance values from the color image;
Filtering the extracted luminance values using a low pass filtering program; And
And calculating the average luminance value based on the filtered luminance values. delete 3. The method of claim 2,
Further comprising repeating the steps of obtaining the average luminance value and identifying the daytime and nighttime when the absolute value of the variation amount of the average luminance value for a set time is greater than a preset second threshold value Method for recording an accident in a recording device. 3. The method of claim 2, wherein storing the color image before and after the occurrence of the accident in the memory comprises:
Selecting and temporarily storing a color image received from the plurality of photographing units;
Comparing a sensing value received from at least one of the plurality of impact sensors with a preset reference value and determining whether an accident has occurred according to the comparison result;
Storing a temporarily stored color image and a color image received from the plurality of photographing units in the memory when it is determined that an accident has occurred; And
And when it is determined that the event is not an accident, obtaining the average luminance value and repeating the step of identifying the day and the night. 3. The method of claim 2, wherein the step of storing infrared images before and after the occurrence of the accident in the memory comprises:
Selecting and temporarily storing an infrared image received from the plurality of photographing units;
Comparing a sensing value received from at least one of the plurality of impact sensors with a preset reference value and determining whether an accident has occurred according to the comparison result;
Storing an infrared image temporarily stored and an infrared image received from the plurality of photographing units in the memory when it is determined that an accident has occurred; And
And when it is determined that the event is not an accident, obtaining the average luminance value and repeating the step of identifying the day and the night.

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