KR20150132672A - Video recording system for saving selected frame to high resolution and method of operation thereof - Google Patents

Abstract

Disclosed are a video recording system to store a selected frame at high resolution, and an operation method thereof. The operation method of a video recording system comprises: a step of detecting whether a preset event has occurred; a step of checking whether the preset event has occurred at a certain frequency or smaller in response to the occurrence of the preset event; and a step of selecting at least one frame from a photographed image, and storing the selected frame as a high resolution image file in response to the preset event which has occurred at the certain frequency or smaller.

Description

TECHNICAL FIELD [0001] The present invention relates to a video recording system and a video recording system for storing a selected frame at a high resolution.

The present invention relates to a video recording system and method of operation for storing selected frames at high resolution. More particularly, to a video recording system and method for storing selected frames at high resolution for selectively storing data.

The vehicle's black box is also called a video event data recorder (VEDR) for automobiles. It is a device that records useful information necessary for identification of an accident situation. With the development of technology, The recording is performed according to various situations.

In addition, such a vehicle black box improves the convenience of the driver by adding various functions such as running time, vehicle speed, running time, stopping time, and voice contents as well as images of the inside and outside of the vehicle, It is helping us to understand the situation accurately.

Particularly, it is in recent trends that it is obligatory to install the vehicle black box on the basis of the research result that the accident can be reduced by installing the vehicle black box.

In addition, the vehicle black box includes a storage medium for recording a driving image of a vehicle. As a typical storage medium, there is a memory card, a USB storage method, a large capacity hard drive storage method, and the like.

In addition, the file stored in the memory card of the black box is a moving picture file, and the size of the encoded file is very large. Accordingly, when a black box for a vehicle is normally recorded, a moving image file is generated every minute, so that writing to a memory card (or a storage medium) such as an SD card frequently occurs, thereby shortening the life of the memory card.

An object of the present invention is to provide an event detector for determining whether or not an event has occurred on a photographed image and to provide a video recording system for selectively storing data in a high- And a method of operation.

According to an aspect of the present invention, there is provided a storage medium storing an event generating frame of an image in which an event occurs and storing the event generating frame in a high resolution image file, And to provide a video recording system and method for storing selected frames at high resolution.

According to an aspect of the present invention, there is provided a method of operating a video recording system for storing a selected frame at high resolution according to the present invention, the method comprising the steps of: detecting whether a preset event has occurred; Confirming whether or not the predetermined event has occurred at a predetermined frequency or less in response to the occurrence of the preset event; Selecting at least one frame from the photographed image in response to the predetermined event occurring at a predetermined frequency or less, and storing the selected at least one frame as a high-resolution image file.

The preset event may detect the vehicle in the event detector and generate an event.

The step of detecting whether or not the preset event has occurred may include storing the photographed image as a low resolution video file when the predetermined event does not occur.

The step of storing the photographed image as a moving image file having a low resolution includes the steps of photographing an image at a high resolution in an image sensor; And a step of downsampling the image into a moving image file having a low resolution and storing the image in the image signal processing unit.

The step of checking whether the preset event has occurred at a certain frequency or less may include compressing the photographed image and storing it as a high resolution movie file when the preset event occurs over a certain frequency .

The step of selecting the at least one frame and storing the at least one frame as a high resolution image file comprises the steps of: detecting the number plate of the vehicle at the event detector; And selecting a frame including the license plate of the vehicle from the photographed image and storing the selected frame as a high-resolution image file.

The step of selecting the at least one frame and storing the at least one frame as a high resolution image file may include at least one of a time frame of occurrence of the preset event and a frame immediately after occurrence of the preset event in the captured image, As shown in FIG.

The high-resolution image file may generate and store a file separately from the moving image file of the photographed image.

The step of selecting the at least one frame and storing the selected at least one frame as a high resolution image file may store metadata representing information of the photographed image together with the high resolution image file.

And displaying the corresponding image by reading the high-resolution image file of a specific part when the user confirms the video file in cooperation with the exclusive viewer.

According to another aspect of the present invention, there is provided a video recording system for storing a selected frame at high resolution according to the present invention, the video recording system comprising: an event detector for detecting occurrence of a predetermined event and occurrence frequency of the preset event; An image encoder for selecting at least one frame from the photographed image to generate a high-resolution image file; A processing unit for encoding the photographed image using the image encoder when the preset event is detected at a predetermined frequency or less in the event detector; And a storage unit for storing the high-resolution image file encoded by the image encoder.

The preset event may detect the vehicle in the event detector and generate an event.

And a motion picture encoder for generating a motion picture file by encoding the photographed image, wherein when the preset event is not detected in the event detector, the processor uses the motion picture encoder to convert the photographed image into a low- It can be encoded as a file.

And a motion picture encoder for generating a motion picture file by encoding the photographed image, wherein, in the event that the preset event is detected in a predetermined frequency in the event detector, Can be compressed and encoded into a high-resolution video file.

An image sensor for capturing an image at high resolution; The image signal processing unit may downsample the photographed image into a low-resolution video file when the preset event is not detected in the event detector, .

The image encoder can encode a frame including the license plate detected by the event detector into a high resolution image file.

The image encoder may encode at least one of a time frame of occurrence of the preset event detected by the event detector and a frame immediately after the occurrence of the preset event and may be encoded into a high resolution image file.

The high-resolution image file may be generated separately from the moving image file of the photographed image and stored in the storage unit.

The storage unit may store metadata representing information of the photographed image together with the high-resolution image file.

According to embodiments of the present invention, an event detector for determining whether or not an event is generated for a photographed image is constructed, and a video recording system for storing a selected frame that can efficiently use a storage space at a high resolution by selectively storing data, And an operation method.

According to embodiments of the present invention, an event generation frame of an image in which an event occurs is stored as a high-resolution image file, and an image in which an event is not generated is stored as a low-resolution file to efficiently use the storage space, It is possible to provide a video recording system and an operation method for storing a selected frame at a high resolution.

1 is a block diagram showing a configuration of a general video recording system of the present invention.
FIG. 2 is a flowchart illustrating an operation method of a video recording system for storing a selected frame at high resolution according to an exemplary embodiment of the present invention.
3 is a flowchart illustrating a method of storing selected frames in a high-resolution image file in a video recording system according to an exemplary embodiment of the present invention.
4 is a flowchart illustrating a method of storing selected frames in a high-resolution image file in a video recording system according to another embodiment of the present invention.
5 is a block diagram illustrating a video recording system for storing selected frames at high resolution according to an embodiment of the present invention.
6 is a diagram illustrating an example of a method of storing an image file in a video recording system according to an embodiment of the present invention.
7 is a diagram illustrating an example of a method of storing an image file in a video recording system according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Most of the reasons why high-quality images are required in a black box system are to read license plates. At this time, the type of the vehicle, the color of the vehicle, the signal of the traffic light, the presence of the pedestrian, and the accident history can be sufficiently read by a low resolution image of 720p or less.

Generally, a vehicle often stays for more than a few seconds in the angle of view captured by a black box, and it is not necessary to store all the frames in high quality in order to read a license plate. Therefore, by additionally configuring the vehicle detection or license plate detection system, it is possible to reduce the amount of data generated by selectively storing the detected vehicle or license plate with high quality, and by efficiently using the storage space, You can save images for more time without losing information.

1 is a block diagram showing a configuration of a general video recording system of the present invention.

1, a video recording system may include a video imaging device 110, a control unit 120, a memory card 130, a DRAM 140, and a sensor 150.

First, the image photographing apparatus 110 photographs an image and provides it as a file. In general, a camera is used. Here, a vehicle front camera, a rear camera, a side camera, and the like can be applied.

The control unit 120 may store a file provided by the image photographing apparatus 110 according to an event sensed by the sensor 150, and may determine the importance of the file and store or overwrite the file. Accordingly, when the empty space is confirmed, the controller 120 can store a new file in the memory card 130, and can store a new file in the memory card 130 If the space is not confirmed, the file having the lowest importance can be searched and the file having the lowest importance can be replaced with a new file and overwritten, thereby being stored in the memory card 130.

In this case, the importance of the file is generally determined according to the generation time of the file. In order to keep the file that the user actually believes is important for a long term, the importance of the file is reflected It is also possible to judge.

The memory card 130 is a space in which a file provided by the control unit 120 can be stored. The memory card 130 is generally made of a nonvolatile memory and includes a meta file including video and audio files and other information about the file (file creation time, file storage location, file name, file importance, etc.) It is a storage means that can store data. Herein, the memory card 130 may include a storage medium such as a Secure Digital (SD) card, a Micro Secure Digital (SD) card, A flash memory, an SSD (Solid State Drive), a HDD (Hard Disc Drive), a USB memory (Universal Serial Bus), and the like. In addition, various kinds of digital storage media Can be used.

Unlike the memory card 130, the DRAM 140 is a temporary storage unit that is made up of a volatile memory and deletes stored contents when power supply is interrupted. As described above, the use of the volatile memory can temporarily improve the processing speed and the like by temporarily storing information in another apparatus to facilitate transmission and reception of information.

Finally, the sensor 150 may sense shock or collision situations, overspeed situations, rapid deceleration situations, rapid acceleration situations, external noise changes, and the like. That is, the at least one sensor 150 senses the occurrence of an impact or the like, and can store the file in the memory card 130. Here, the type of the sensor 150 is not limited, but a collision detection sensor, a velocity detection sensor, an acceleration sensor and a rotation detection sensor, a laser, an ultrasonic wave, a GPS, an acoustic sensor, a user push button, and the like can be used.

FIG. 2 is a flowchart illustrating an operation method of a video recording system for storing a selected frame at high resolution according to an exemplary embodiment of the present invention.

In step 210, the video recording system is provided with an event detector, which can detect whether a preset event has occurred. At this time, the event can be preset by the user or designer such as vehicle detection, pedestrian detection, license plate detection of the vehicle. Among these, there is no limitation on the kind of the preset event, but an event can be generated by detecting the vehicle by the event detector on the photographed image.

In step 220, when a preset event is generated by the event detector, it is possible to check whether or not the number of occurrences of the preset event has occurred to a certain frequency or less.

In step 230, when the number of occurrences of events preset by the event detector is less than a predetermined frequency, at least one frame may be selected from the captured image and stored as a high-resolution image file. For example, when the vehicle is detected by the event detector, the detected vehicle may select at least one frame among frames of the photographed image and store the selected frame as a high-resolution image file.

Here, a high-resolution image file is generated and stored separately from the moving image file of the photographed image. When storing a high-resolution image file, metadata representing information of the captured image may be stored together with a high-resolution image file.

In this case, metadata is data that is given according to a certain rule in order to efficiently find and use desired information in a large amount of information, and is data that explains other data. Here, the metadata may be information such as time information, the name of a moving picture file to be linked, a frame number, and the like.

In step 240, if the preset event is not generated by the event detector, the photographed image may be stored as a moving image file having a low resolution. For this purpose, the image sensor captures an image at a high resolution, and the image signal processing unit downsamples the image into a low-resolution movie file, thereby efficiently storing the low-resolution movie file and using the storage space.

If a preset event occurs in a photographed image in excess of a predetermined frequency in step 250, a method of generating and storing a high-resolution image file according to the occurrence of an event may occupy a large storage space . Accordingly, it is preferable that the photographed image is compressed and stored as a high-resolution moving image file.

In addition, the video recording system is interlocked with a dedicated viewer so that when a user confirms a video file using a dedicated viewer, the user can read the high resolution image file of the specific portion stored and display the corresponding image, So that accurate information can be received. Here, although the user can check the moving image and the high resolution image without using the exclusive viewer, it is possible to check the high-resolution image of the specific part while reproducing the moving image file by using the exclusive viewer.

3 is a flowchart illustrating a method of storing selected frames in a high-resolution image file in a video recording system according to an exemplary embodiment of the present invention.

In step 231, at least one frame of the photographed image is selected and stored as a high-resolution image file. The event detector detects the license plate, and then, in step 232, The frame containing the license plate can be selected and saved as a high-resolution image file.

4 is a flowchart illustrating a method of storing selected frames in a high-resolution image file in a video recording system according to another embodiment of the present invention.

In step 233, a method of selecting at least one frame and storing the selected at least one frame as a high-resolution image file is a method in which at least one of a time frame at which a preset event occurs in a photographed image, And can be saved as a high-resolution image file. As a result, it is possible to store a frame at an important point in a high-resolution image file.

A method of operating a video recording system for storing a selected frame at high resolution according to an embodiment of the present invention will be described by way of example. Here, a predetermined event is generated by detecting the presence or absence of a vehicle through an event detector and generating an event will be described in detail.

For example, in a video recording system for a vehicle, a vehicle can not be detected in an event detector when there is no vehicle around the vehicle while driving, so that the vehicle can be photographed and stored at a low resolution. That is, a high resolution image is captured by the image sensor CIS, and then the downsampling is performed by the ISP, which is an image signal processing unit, and the resolution is lowered to store the low resolution video file, so that the storage space can be efficiently used.

If the event detector detects that there is a vehicle in the image, only the frame or the next frame can be additionally stored as a high-resolution image file. That is, the high-resolution image captured by the image sensor (CIS) can be immediately JPEG-compressed and stored as a high-resolution image file without downsampling. Here, it is also possible to store only the frame including the license plate of the vehicle as a high-resolution image file by detecting the license plate of the vehicle from the event detector.

In addition, when the vehicle senses an excessive amount of the vehicle in the event that the vehicle runs on the city road, the frequency of occurrence of the event is judged. If the vehicle detection exceeds the predetermined time with respect to the time, It can be saved as a video file. This is because compression of an image file can greatly increase the capacity rather than compression of a moving picture file if the number of frames is large, so that compression of a moving picture file is efficient in order to store a large number of frames.

It is also possible to capture and record a high-resolution image at a predetermined time without using an event detector. When storing a high resolution image file at a predetermined time interval, there is an advantage of not providing an event detector. However, since importance is not determined, an image file of a significant event can not be obtained, or an unnecessary image is recorded at a high resolution There are disadvantages.

5 is a block diagram illustrating a video recording system for storing selected frames at high resolution according to an embodiment of the present invention.

5, a video recording system for storing a selected frame at a high resolution includes an image unit 310, an event detector 320, an image encoder 330, a moving picture encoder 340, a processing unit 350, (360).

The image processor 310 may include an image sensor 311 for capturing an image at a high resolution and an image signal processor 312 for downsampling the image at a low resolution. It is possible to downsample the photographed image into a moving image file of a low resolution.

The event detector 320 can detect occurrence of a preset event and occurrence frequency of a preset event in the photographed image. At this time, the event can be preset by a user or a designer such as vehicle detection, pedestrian detection, license plate detection of a vehicle, etc. Among the events, a preset event can detect an automobile from an event sensor and generate an event.

 The image encoder 330 may select at least one frame from the photographed image to generate a high-resolution image file. The image encoder 330 may encode at least one of a time frame of occurrence of a preset event detected by the event detector 320 and a frame immediately after the occurrence of the preset event and may be encoded into a high resolution image file. Here, the high-resolution image file is a file generated separately from the moving image file of the photographed image and stored in the storage unit.

The video encoder 340 may encode the photographed video to generate a video file. The image picked up by the image sensor 311 of the image unit 310 may be downsampled by the image signal processing unit 312 and may be encoded into a moving image file having a relatively small amount of data. It can be encoded into a high-resolution video file.

The processing unit 350 is a processor that encodes a video file photographed during driving and parking of the vehicle, and stores the encoded video file in a storage unit. The processor 350 may encode the image photographed using the image encoder 330 into a high-resolution image file when a preset frequency of occurrence of the event is detected to be less than a predetermined frequency in the event detector 320, When the preset event is detected by the event detector in excess of a predetermined frequency, the captured image can be encoded into a high-resolution moving image file using the moving image encoder 340. In addition, when no preset event is generated in the event detector, the processor 350 may encode the captured image using the video encoder 340 into a low-resolution video file since no event has occurred.

The storage unit 360 is a space for storing the photographed image encoded in the video recording system, and can store data to be actually recorded. Generally, the storage unit 360 uses a storage element such as a flash memory. Here, the storage unit 360 may store the high-resolution image file encoded by the image encoder 330, or may store the encoded moving image file by the moving image encoder 340.

The storage unit 360 may store the meta data representing the photographed image together with the high resolution image file. In this case, metadata is data that is given according to a certain rule in order to efficiently find and use desired information in a large amount of information, and is data that explains other data. Here, the metadata may be information such as time information, the name of a moving picture file to be linked, a frame number, and the like.

In addition, the communication device 370 may be added to communicate with a device such as a user terminal.

As described above, the direction of the moving image data is compressed after the image is compressed in a manner similar to the conventional black box system. To be more specific, the event detector 320 may check whether an event has occurred in the image captured by the image unit 310 and select the event. At this time, the event can be set to occurrence of vehicle detection, license plate detection, pedestrian detection, and the like. Then, the photographed image may be compressed and encoded by the moving picture encoder 340 and stored in the storage unit 360.

In addition, the direction of the image data can be determined by selecting a specific frame according to an instruction from the processing unit 350, compressing the image into an image file by the image encoder 330, and storing the image in the storage unit 360 have. Here, although the image file to be stored is high-resolution, since only one frame is stored, the amount of data is relatively smaller than that of the video file.

Therefore, for a captured image in which an event has not occurred, the captured image is stored as a low-resolution moving image file. For a captured image in which an event of a certain frequency occurs, a frame at the time of occurrence of the event, It is possible to provide a reliable video recording system for a vehicle that can efficiently manage an image file and a video file stored in the video recording system and further provides accurate information.

6 is a diagram illustrating an example of a method of storing an image file in a video recording system according to an embodiment of the present invention.

Referring to FIG. 6, the video recording system may detect occurrence of an event, select at least one frame, and store the selected image as a high-resolution image file. At this time, it is possible to select at least one of a preset event occurrence time frame and a frame immediately after occurrence of a preset event, and store the selected image file as a high resolution image file.

In addition, among the photographed images, the event sensor detects the license plate of the vehicle, and the frame including the license plate of the vehicle can be selected and stored as a high-resolution image file.

In addition, it is preferable that a frame in which no event occurs in the photographed image is compressed and stored at a low resolution.

7 is a diagram illustrating an example of a method of storing an image file in a video recording system according to an embodiment of the present invention.

Referring to FIG. 7, the video recording system may store a low-resolution video file having a small capacity with respect to an image having no event. That is, by generating a low-resolution file by lowering the picture quality or resolution of the moving picture file, the limited storage space can be used more efficiently.

Here, high-resolution and low-resolution are relative concepts. First, low-resolution is advantageous in that the amount of data is small, but detailed information such as license plate letters of a vehicle may not be obtained. However, high-resolution data is difficult to process because of the large amount of data, while detailed information such as license plate letters can be obtained.

For example, when a 1080p (1920x1080) high resolution image and a VGA (640x480) image are set as a low resolution standard, the amount of data to be stored in a micro SD card can be drastically reduced while recording information similar to a conventional black box have.

Similarly, for example, when 1080p is set to a low resolution and 4k (3840x2160) is set to a high resolution standard, a clearer image can be additionally stored while storing an image having the same resolution as a conventional black box. However, a 4k movie file is too large to store on a micro SD card. Accordingly, by selectively storing necessary frames, it becomes possible to store a file having a higher resolution than the existing resolution in the micro SD card.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, controller, arithmetic logic unit (ALU), digital signal processor, microcomputer, field programmable array (FPA) A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing apparatus may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

110: image capturing apparatus 120:
130: memory card 140: DRAM
150: sensor 310:
311: Image sensor 312: Image signal processor
320: event detector 330: image encoder
340: Moving picture encoder 350:
360: storage unit 370: communication device

Claims (19)

A method of operating a video recording system,
Detecting whether a preset event has occurred;
Confirming whether or not the predetermined event has occurred at a predetermined frequency or less in response to the occurrence of the preset event; And
Selecting at least one frame from the photographed image in response to the preset event occurring at a predetermined frequency or less, and storing the selected at least one frame as a high-resolution image file
And storing the selected frames at a high resolution. The method according to claim 1,
The preset event
Detecting a vehicle from an event detector and generating an event
Characterized in that the selected frame is stored at a high resolution. The method according to claim 1,
Wherein the step of detecting whether the preset event has occurred
If the preset event does not occur, storing the photographed image as a low resolution movie file
And storing the selected frames at a high resolution. The method of claim 3,
The step of storing the photographed image as a low resolution moving image file
Capturing an image at a high resolution from an image sensor; And
The image signal processing unit downsamples the image into a moving image file having a low resolution and stores the down-
And storing the selected frames at a high resolution. The method according to claim 1,
Wherein the step of checking whether the preset event has occurred at a predetermined frequency or less
Compressing the photographed image and storing the photographed image as a high-resolution video file when the preset event occurs over a certain frequency
And storing the selected frames at a high resolution. 3. The method of claim 2,
The step of selecting the at least one frame and storing it as a high resolution image file
Detecting a license plate of the vehicle from the event detector; And
Selecting a frame including the number plate of the vehicle from the photographed image and storing the selected frame as a high resolution image file
And storing the selected frames at a high resolution. The method according to claim 1,
The step of selecting the at least one frame and storing it as a high resolution image file
Storing at least one of a time frame of occurrence of the preset event and a frame immediately after the occurrence of the preset event in the photographed image as a high resolution image file
And storing the selected frames at a high resolution. The method according to claim 1,
The high resolution image file
And generating and storing a file separately from the motion picture file of the photographed image
Characterized in that the selected frame is stored at a high resolution. The method according to claim 1,
The step of selecting the at least one frame and storing it as a high resolution image file
The metadata representing the information of the photographed image is stored together with the high-resolution image file
Characterized in that the selected frame is stored at a high resolution. The method according to claim 1,
When the user confirms the video file by interlocking with the exclusive viewer, the high-resolution image file of the specific part is read and the corresponding image is displayed
And storing the selected frame at a high resolution. A video recording system comprising:
An event detector for detecting the occurrence of a preset event and the occurrence frequency of the preset event;
An image encoder for selecting at least one frame from the photographed image to generate a high-resolution image file;
A processing unit for encoding the photographed image using the image encoder when the preset event is detected at a predetermined frequency or less in the event detector; And
A storage unit for storing the high-resolution image file encoded by the image encoder,
Wherein the selected frame is stored at a high resolution. 12. The method of claim 11,
The preset event
Detecting the vehicle from the event detector and generating an event
Wherein the selected frame is stored at a high resolution. 12. The method of claim 11,
And a moving picture encoder for generating a moving picture file by encoding the photographed image,
The processing unit
If the preset event is not detected in the event detector, encoding the photographed image into a low-resolution video file using the video encoder
Wherein the selected frame is stored at a high resolution. 12. The method of claim 11,
And a moving picture encoder for generating a moving picture file by encoding the photographed image,
The processing unit
And compressing the photographed image by using the motion picture encoder and encoding the photographed image into a high-resolution motion picture file when the preset event is detected by the event detector in excess of a predetermined frequency
Wherein the selected frame is stored at a high resolution. 12. The method of claim 11,
An image sensor for capturing an image at high resolution;
An image signal processor for down-sampling the image at a low resolution,
Further comprising:
Wherein the image signal processing unit down-samples the photographed image into a low-resolution video file when the preset event is not detected in the event detector
Wherein the selected frame is stored at a high resolution. 13. The method of claim 12,
The image encoder
And encoding a frame including the license plate detected by the event detector into a high resolution image file
Wherein the selected frame is stored at a high resolution. 12. The method of claim 11,
The image encoder
And encoding a high-resolution image file including at least one of a generation time frame of the preset event detected by the event detector and a frame immediately after the generation of the preset event
Wherein the selected frame is stored at a high resolution. 12. The method of claim 11,
The high resolution image file
A file is generated separately from the moving image file of the photographed image and stored in the storage unit
Wherein the selected frame is stored at a high resolution. 12. The method of claim 11,
The storage unit
The metadata representing the information of the photographed image is stored together with the high-resolution image file
Wherein the selected frame is stored at a high resolution.

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