KR100531524B1 - Method for extracting an accident video stored in video storage system for car - Google Patents

Abstract

The present invention relates to a method for extracting an accident image in a vehicle image storage system, comprising: photographing a front driving situation and a rear driving situation from a front and rear camera of a vehicle, and converting the photographed analog image into a digital image by A / D conversion; Set the active area and sensitivity by comparing sensitivity with a preset active area on the basis of the set cell of the screen division area, detecting brightness or color difference of adjacent images between frame memories and checking an image change of at least one frame section. Recognizing that the vehicle is stopped or accident when the value is less than the value; And stops writing data to a recording or data storage medium (flash memory, HDD), keeps the image data continuously, checks whether the specified time is exceeded, and deletes the accident video when the specified time is exceeded. And permanently preserving the extracted accident images of the front and rear situations in the event of a vehicle accident and storing them in the vehicle image storage system, and moving the digital image information input from the front and rear cameras by image processing. When the motion information is suddenly stopped by extraction, it is recognized as an accident, and thus, more accurate information about the forward and backward driving situation and the accident situation can be obtained in a vehicle accident.

Description

{METHOD FOR EXTRACTING AN ACCIDENT VIDEO STORED IN VIDEO STORAGE SYSTEM FOR CAR}

The present invention relates to a method for extracting an accident image in a vehicle image storage system. In particular, in a vehicle accident, an accident image of a front situation and a rear situation is extracted from a front and rear camera and stored in an image storage system for a vehicle, and the front and rear sides are image-processed. When the motion information is suddenly stopped by extracting the movement of digital image information input from the camera, it is recognized as an accident and the accident image is extracted from the vehicle image storage system that can accurately grasp the information on the forward and backward driving state and the accident situation during the vehicle accident. It is about how to recognize.

In general, a vehicle black box system is representative of a flight recorder that records the performance and status of an aircraft in flight, and recently, the black box system has been used in vehicles such as automobiles as well as the aircraft. . The vehicle black box system stores information in a record of a driving state and an accident situation of the vehicle. Therefore, when a vehicle accident occurs, it is possible to make an objective judgment according to the accident based on the record stored in the black box.

1 is a configuration diagram of a black box system for a vehicle for storing information about a driving state and an accident status of a conventional vehicle. Referring to FIG. 1, the vehicle black box system includes a sensor 4 for detecting a speed and an external impact of a vehicle, a front camera 6 installed at one side of a room mirror to photograph the front of the vehicle, and the vehicle. Input and output of the rear camera 8 and the rear camera 8 in the vehicle's interior brake light or the rear and the front and rear cameras are controlled and decoded and encoded so that the rear of the vehicle can be photographed. And a black box 1 for storing driving information of the vehicle for video signal processing.

The front camera 6 and the rear camera 8 attached to the vehicle capture images of the front situation and the rear situation of the vehicle so that input and output of video signals captured by the front and rear cameras are controlled and inputted and outputted. Using a vehicle black box that is processed and stored in a video signal that decodes and encodes a video signal, information about a driving state and an accident situation of the vehicle is accurately provided.

The black box 1 is a video signal processing device 2 which decodes and encodes a video signal which is controlled and input / output of a video signal by the front camera 6 and the rear camera 8, and the current time. The first memory device 10 and the current memory taken from the cameras that are compressed in the first memory device 10 to store driving conditions captured by the cameras before and after the predetermined time as a video signal. And a second memory device 12 which decompresses and stores the video signal.

The first memory device 10 repeatedly stores and removes the driving state of the vehicle at regular intervals, and stores the driving state before and after the accident by the signal of the shock sensor.

In addition, a display device 4 for displaying video signals stored in the first memory device 10 and the second memory device 12 is provided. In addition, the vehicle black box is a video signal processing apparatus for decoding and encoding a video signal input and output by the front camera and the rear camera and the input and output of the video signal, the front and rear of the predetermined time based on the current time And a second memory device which decompresses and stores the video signal compressed and stored in the first memory device. That is, the first memory device 40 repeatedly stores and removes the driving state of the vehicle at regular intervals, and the second memory device 40 performs the first memory device 40 according to the signal of the sensor in case of an accident. It saves the driving state before and after the accident stored in the compressed state. In addition, a display device capable of immediately observing a recorded driving situation by displaying video signals stored in the first and second memory devices is provided.

In addition, an operation display means for displaying the operation state of the black box and the operation state of the second storage device is provided, and the driving state is manually recorded in the second memory device when a minute shock or simple scratch occurs that the sensor does not detect during driving. A second memory device manual input switch for storing and a second memory device reset switch for arbitrarily deleting records stored in the second memory device are provided.

Referring to FIG. 2, a diagram illustrating a camera position attached to a vehicle equipped with a vehicle black box system, wherein the front camera 6 is positioned on an upper end of an instrument panel panel 22 displaying the speed of the vehicle. The rear camera 8 is provided to be located in a simple luggage compartment 28 provided in the rear seat of the vehicle. Here, when the indoor brake light 30 is provided in the simple luggage compartment 28, the indoor brake light 30 may be provided at the upper end.

However, the vehicle image storage device has a basic function of a camera, a video compression codec, and a flash memory, and uses an acceleration sensor or a manual switch to recognize a vehicle accident. However, in this case, the driver may be nervous and forget, and there is a defect that is not recognized when the accident is small but the impact on the vehicle is small.

As a method of recognizing an accident of a vehicle, one of sound and image information may be used, and a method of using sound may include a method of detecting a collision or metal rupture sound, and a method of using an image may have a complicated processing method. Only a simple way to find out is possible.

The present invention has been proposed to solve the problems of the prior art, and an object of the present invention is to recognize a vehicle accident in a system having an image storage device of a vehicle by using an image processing method without using an existing acceleration sensor or a water switch. In the recognition method, in case of an accident of a vehicle, the captured accident images of the front situation and the rear situation are extracted from the front and rear cameras attached to the vehicle and stored in the vehicle image storage system, and the movement of the digital image information input from the front and rear cameras is extracted. It is to provide an accident image extraction method in a vehicle image storage system that can be recognized as an accident when the motion information is suddenly stopped to obtain more accurate video information about the front and rear driving situation and the accident situation when the vehicle accident.

In order to achieve the object of the present invention, the present invention provides a vehicle image storage system: by taking a front driving situation and a rear driving situation from the front and rear cameras of the vehicle (S1), and A / D conversion of the photographed analog image digital Converting to an image (S2); By comparing the sensitivity with the preset active area based on the set cell of the screen division area (S3), by detecting the brightness or color difference of adjacent images between the frame memory (S4) by checking the image change of at least one frame section (S4) S5) recognizing that the vehicle is stopped or accident when the active area and the sensitivity is less than the set value (S6) and repeating the process after S3 if the set value is more than the set value; And stops writing data to a recording or data storage medium (flash memory, HDD) and keeps the image data (S7) and checks whether the specific time is exceeded (S8) and when the specific time is exceeded. In the vehicle image storage system, characterized in that the step of permanently preserving the image in a non-deletable state (S9) provides an accident image extraction method.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a configuration diagram of a system for extracting accident images in a vehicle image storage system.

Referring to FIG. 3, the front camera 20 for photographing the front situation of the vehicle, the rear camera 21 for photographing the rear situation of the vehicle, and the A / D for converting the photographed analog image into a digital image A converter 22, a frame memory 23 composed of two or more frame buffers (# 1 to #n) for storing a digitally converted image, and a correlation (Subtraction, Correlation) by comparing the interval between the frames Non-volatile semiconductor memory by encrypting and compressing an input digital image, and an image processing unit (CPU) 24 that detects a motion of a visual image outside the vehicle to process various operations of Or an image storage device 25 for storing in a hard disk (HDD) or the like, and decrypting and decompressing a digital image encrypted using a specific encryption algorithm and codec from the image storage device. D / A converter 26 for converting and restoring an analog image, and a CRT or LCD monitor 27 for outputting the analog image provided from the D / A converter 26 on a screen.

4A is a flowchart illustrating a method of extracting an accident image and recognizing an accident in an image storage system for a vehicle according to the present invention.

Shoot the front driving situation and the rear driving situation from the front and rear cameras of the vehicle (step S1), convert the photographed analog image to digital image by performing A / D conversion (step S2), and then set a cell in the screen division area. By comparing the active area and sensitivity set as a reference (step S3), and detecting the brightness or color difference of adjacent images between the frame memory for storing the A / D converted image data (step S4) The image processing apparatus (CPU) checks for an image change of at least one frame section or more (step S5) and recognizes that the vehicle is stopped or has an accident when it is less than or equal to the set value of the active area and sensitivity (step S6). If so, the process after step S3 is repeated.

Stop writing data to the recording or data storage medium (flash memory, hard disk (HDD)) and continue to preserve the image data (step S7), check if it has exceeded the specified time (step S8) and exceed the specified time If the accident image is not overwritten or erased, the image is permanently stored in a state where the write protect cannot be deleted (step S9). At this time, if the specific time does not exceed, the process after S3 is repeated.

4B is a block diagram illustrating a relationship between a reference video memory block and a current video memory block in a frame memory. Motion from the front and rear cameras is detected as fast and slow, and slow motion is detected in the farther image frame memory. The value between the reference video memory block and the current video memory block can be set from one or more to 64 or less.

The method proposed in the present invention recognizes an accident when the motion information is suddenly stopped by extracting the movement of the captured image from the front and rear cameras installed in the vehicle without using a conventional method of detecting a sound such as a collision or metal rupture sound. . Of course, this could include waiting for a signal or parking a vehicle. However, there are also accidents in which the vehicle no longer moves.

The photographed digital image stores the captured image only when there is movement using a method of detecting the movement of the captured image from the front and rear cameras installed in the vehicle, and recognizes the driving situation before and after the vehicle accident by recognizing it as an accident when the movement information suddenly stops. Can be.

Therefore, in case of an accident of the vehicle, the captured accident image of the front situation and the rear situation is extracted from the front and rear cameras and stored in the vehicle image storage system, and the motion information is suddenly extracted by extracting the motion of the digital image information input from the front and rear cameras attached to the vehicle. If the vehicle is stopped, it can be recognized as an accident, so that more accurate information about the forward and backward driving situation and the accident situation can be obtained.

As described above, only specific embodiments described in the present invention have been described in detail, but it is apparent to those skilled in the art that various changes and modifications are possible within the technical scope of the present invention, and such modifications and modifications are included in the appended claims. Belonging is natural.

As described above, the accident image extraction method in the vehicle image storage system according to the present invention is to recognize the accident by the image processing method without using the existing acceleration sensor or water switch, the vehicle accident recognition, front and rear cameras during the accident Extracts the captured accident images of the front situation and the rear situation from the vehicle and stores them in the vehicle image storage system, extracts the movement of the digital image information input from the front and rear cameras attached to the vehicle, and recognizes it as an accident when the motion information suddenly stops. In the event of a car accident, you can obtain more accurate accident image information about the forward and backward driving situation and the accident situation.Therefore, there is a difference in opinion between the offender and the victim when a traffic accident occurs, so record the driving status of your vehicle and the operation status of the other vehicle, and To track down and determine the exact cause of the accident It can be effective.

1 is a block diagram of a conventional vehicle black box system.

Figure 2 is a configuration diagram of the camera attached to a vehicle equipped with a conventional vehicle black box system.

3 is a schematic diagram of a system for extracting accident images in a vehicle image storage system according to the present invention;

Figure 4a is a flow chart illustrating a method for recognizing the accident by extracting the accident image in the vehicle image storage system according to the present invention.

4B is a block diagram illustrating a relationship between a reference video memory block and a current video memory block in a frame memory;

<Description of the code | symbol about the principal part of drawing>

20: front camera 21: rear camera

22: A / D Converter 23: Frame Memory

24: image processing device 25: image storage device

26: D / A converter 27: Monitor

Claims (2)

In a vehicle video storage system: Photographing the front driving situation and the rear driving situation from the front and rear cameras of the vehicle (S1), and converting the photographed analog image into a digital image by A / D conversion (S2); By comparing the sensitivity with the preset active area based on the set cell of the screen division area (S3), and detecting the brightness or color difference of adjacent images between the frame memory (S4) by checking the image change of at least one frame section (S4) S5) recognizing that the vehicle is stopped or accident when the active area and the sensitivity is less than the set value (S6) and repeating the process after S3 if the set value is more than the set value; And Stops writing data to a recording or data storage medium (flash memory, HDD) and keeps the image data (S7) and checks whether the specified time is exceeded (S8). Accidental image extraction method in the vehicle image storage system, characterized in that consisting of a step (S9) to permanently preserve in an impossible state. The method of claim 1, The captured image is stored in the flash memory only when there is a motion by using a method of detecting the motion of the image from the camera, and recognizes as an accident when the motion information suddenly stops in the image processing unit (CPU) Accident image extraction method in a vehicle image storage system.