WO2015174710A1

WO2015174710A1 - Video recording system for storing selected frame at high resolution and operation method thereof

Info

Publication number: WO2015174710A1
Application number: PCT/KR2015/004715
Authority: WO
Inventors: 정종필; 양진영; 이승한; 이중언; 임진연; 경종민
Original assignee: 재단법인 다차원 스마트 아이티 융합시스템 연구단
Priority date: 2014-05-15
Filing date: 2015-05-12
Publication date: 2015-11-19
Also published as: KR101585326B1; KR20150132672A

Abstract

Disclosed are a video recording system for storing a selected frame at high resolution and an operation method thereof. The method may comprise the steps of: detecting whether a preset event has occurred; checking whether the preset event has occurred at a predetermined frequency or smaller, in response to the occurrence of the preset event; and 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 a predetermined frequency or smaller.

Description

Video recording system and operation method for storing selected frames in high resolution

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

The vehicle black box is also called a video event data recorder (VEDR) for automobiles. It is a device that records useful information necessary to understand the situation of the accident. Recording is performed according to various situations.

In addition, such a black box for the vehicle improves the convenience of the driver by adding various functions such as the driving time, the vehicle speed, the driving time, the stopping time, the audio content, as well as the inside and outside images of the vehicle, and when an accident occurs It helps a lot to understand the situation accurately.

In particular, in recent years, by installing a vehicle black box, there is a trend that mandatory to install in the vehicle from the time of automobile manufacturing based on the research results.

In addition, the vehicle black box includes a storage medium for recording a driving image of the vehicle, and the like, and a general storage medium includes 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 video file, the size of the encoded file is very large. Therefore, during regular recording of the vehicle black box, since a video file is generated every minute, frequent writing to a memory card (or storage medium) such as an SD card may occur, thereby shortening the life of the memory card.

The technical problem to be achieved by the present invention is to configure an event detector for determining whether an event occurs in the captured image, the video recording system for storing the selected frame that can efficiently use the storage space in high resolution by selectively storing the data And to provide a method of operation.

The technical problem to be achieved by the present invention is to store the event generation frame of the event image in a high-resolution image file, and to save the image of the event in a low-resolution file, not only efficiently use the storage space but also high importance The present invention provides a video recording system and an operation method for storing selected frames in high resolution.

According to one aspect, an operation method of a video recording system for storing the selected frame proposed in the present invention in high resolution, the method of operation of the video recording system, comprising: detecting whether a predetermined event occurs; Responsive to the occurrence of the preset event, checking whether the preset event has occurred below a predetermined frequency; And in response to the preset event occurring below a predetermined frequency, selecting at least one frame from the captured image and storing the image as a high resolution image file.

The preset event may generate an event by detecting a vehicle in an event detector.

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

The storing of the captured image as a low resolution video file may include capturing an image at a high resolution with an image sensor; And down-sampling the image into a low resolution moving image file in the image signal processor.

The step of checking whether the preset event occurs below a predetermined frequency may include compressing the captured image and storing the captured image as a high resolution video file when the preset event occurs above a predetermined frequency. .

Selecting and storing the at least one frame as a high resolution image file may include detecting a license plate of the vehicle at an event detector; And selecting a frame including the license plate of the vehicle from the captured image and storing the frame as a high resolution image file.

Selecting and storing the at least one frame as a high resolution image file may include at least one of a generation time frame of the preset event and a frame immediately after the occurrence of the preset event in the captured image. It may include storing as.

The high resolution image file may be generated and stored separately from the moving image file of the captured image.

Selecting and storing the 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.

In conjunction with a dedicated viewer, when the user checks a video file, the method may further include reading a high-resolution image file of a specific portion and displaying the corresponding image.

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

The preset event may generate an event by detecting a vehicle in the event detector.

The video encoder may further include a video encoder to generate a video file by encoding the photographed video. When the event detector is not detected by the event detector, the video sensor may output the video to the low resolution video using the video encoder. You can encode it into a file.

The video encoder may further include a video encoder to generate a video file by encoding the photographed video. The processor may detect the photographed video using the video encoder when the event is detected by the event detector more than a predetermined frequency. Can be compressed and encoded into a high resolution video file.

An image sensor for capturing an image at a high resolution; An image signal processor may be further configured to down-sample the image at a low resolution. When the event is not detected by the event detector, the image signal processor may down-sample the captured image into a low-resolution video file. .

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

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

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

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, by configuring an event detector for determining whether an event occurs in the captured image, by selectively storing the data to store the selected frame that can efficiently use the storage space in a high-definition video recording system And a method of operation.

According to embodiments of the present invention, by storing an event generation frame of an image in which an event occurs as a high resolution image file, and storing an image in which the event does not occur as a low resolution file, not only efficiently using the storage space but also having a high importance It is possible to provide a video recording system and a method of operating the selected frame in high resolution.

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

2 is a flowchart illustrating a method of operating a video recording system for storing selected frames in high resolution according to an embodiment of the present invention.

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

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

5 is a block diagram illustrating a video recording system for storing selected frames in 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.

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

Most of the reason why high-quality video is required in a black box system is to read a license plate. At this time, the type of vehicle, the color of the vehicle, the traffic light signal, the presence or absence of a pedestrian, the accident history, etc. can be sufficiently read even with a low resolution image of 720p or less.

In general, a vehicle often stays for more than a few seconds within the angle of view taken by the black box, and it is not necessary to store every frame in high quality to read the license plate. Therefore, by additionally configuring a vehicle detection or license plate detection system, selectively storing the detected vehicle or the license plate part in high quality can reduce the amount of data generated and efficiently use the storage space. Video can be stored for more time without losing information.

Referring to FIG. 1, a video recording system may include an image capturing apparatus 110, a controller 120, a memory card 130, a DRAM 140, and a sensor 150.

First, the image capturing apparatus 110 captures an image and provides the file as a file. In general, a camera is used, and a vehicle front camera, a rear camera, a side camera, and the like may be applied.

The controller 120 may store a file provided by the image capturing apparatus 110 according to an event detected by the sensor 150, and determine the importance of the file to generate a storage or overwriting. Therefore, the controller 120 checks the empty space inside the memory card 130, and when the empty space is confirmed, the controller 120 may store a new file in the memory card 130, and the empty space inside the memory card 130. If the space is not confirmed, the file having the lowest importance may be searched and replaced with a new file with the least important file to be overwritten and stored in the memory card 130.

At this time, determining the importance of the file is generally determined according to the creation time of the file, and reflecting the user's intention or reflecting the importance of the file by using various sensors to store the file which the user considers to be important for a long time. Judgment is also possible.

The memory card 130 is a space for storing a file provided by the controller 120. Memory card 130 is generally comprised of non-volatile memory, and includes meta and 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. Here, the memory card 130 includes a storage medium that can be built in or external to a video recording system for storing data. Examples of the storage medium include an SD card and a micro secure digital card. , Flash memory, solid state drive (SSD), hard disc drive (HDD), universal serial bus (USB memory), and many other types of digital storage media that can be connected to video recording systems. Can be used.

Unlike the memory card 130, the DRAM 140 is a volatile memory, and is a temporary storage means for deleting stored contents when power supply is cut off. As such, the use of the volatile memory can improve the processing speed and the like by temporarily storing the information in another device in order to facilitate the transmission and reception of the information.

Finally, the sensor 150 may detect a shock or crash situation, an overspeed situation, a sudden deceleration situation, a rapid acceleration situation, a change in external noise, and the like. That is, the occurrence of a shock or the like may be detected by the at least one sensor 150, and the file may be stored in the memory card 130. Here, the type of the sensor 150 is not limited in kind, but a collision detection sensor, a speed 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 may be used.

In operation 210, an event detector is provided in the video recording system, and the event detector may detect whether a preset event has occurred. At this time, the event can be set in advance by the user or designer, such as vehicle detection, pedestrian detection, vehicle license plate detection. Among them, the preset event is not limited in kind, but the event may be generated by detecting the vehicle by the event detector in the captured image.

In operation 220, when an event set by the event detector occurs, it may be determined whether the number of occurrences of the preset event occurs below a predetermined frequency.

In operation 230, when the number of occurrences of the event preset by the event detector occurs at a predetermined frequency or less, 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, at least one or more frames among frames of the captured image may be selected and stored as a high resolution image file.

Here, the high resolution image file is generated and stored separately from the video file of the captured image. When storing a high resolution image file, metadata indicating 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 predetermined rule to efficiently find and use desired information from a large amount of information, and is data that explains other data. Here, the metadata may be information such as time information, a name of a linked video file, a frame number, and the like.

In operation 240, when an event set by the event detector does not occur, the captured image may be stored as a low resolution video file. To this end, by capturing an image at a high resolution with an image sensor and down-sampling the image with a low resolution video file at an image signal processor, a low resolution video file may be stored to efficiently use a storage space.

In operation 250, when the occurrence of a preset event in the captured image occurs over a predetermined frequency, a method of generating and storing a high resolution image file according to the occurrence of the event may take up a lot of storage space. . Accordingly, it is preferable to compress the captured image and store it as a high resolution moving image file.

In addition, the video recording system is interlocked with a dedicated viewer, and when a user checks a video file using a dedicated viewer, the user reads a high-resolution image file of a specific part stored and displays the corresponding image. Accurate information can be delivered. Here, although the user can check the video and the high resolution image even without using the dedicated viewer, it is possible to check the high resolution image of the specific part while playing the video file by using the dedicated viewer.

In step 231, a method of selecting at least one or more frames of the captured images and storing them as a high resolution image file may cause the event detector to detect the license plate of the vehicle, and then, in step 232, the vehicle of the captured images You can select a frame that contains a license plate and save it as a high resolution image file.

In operation 233, the video recording system selects at least one frame and stores the image file in a high resolution image file. It can be saved as a high resolution image file. This makes it possible to store the frames of important time points as high resolution image files.

An operation method of a video recording system for storing a selected frame according to an embodiment of the present invention in high resolution will be described by way of example. Here, the preset event will be described in detail as an example of generating an event by detecting the presence of a vehicle through an event detector.

For example, in a vehicle video recording system, when there is no vehicle around while driving, the vehicle is not detected by the event detector, and thus, the vehicle video recording system may record and store at a low resolution. That is, by capturing a high resolution in the CIS, an image sensor, and then down-sampling in an ISP, which is an image signal processor, by lowering the resolution and storing a low resolution video file, the storage space can be efficiently used.

When the event detector detects that a vehicle is present in the image, only the corresponding frame or the next frame may be additionally stored as a high resolution image file. That is, without downsampling the high resolution image photographed by the image sensor CIS, JPEG compression may be immediately performed and stored as a high resolution image file. In this case, the event detector may detect the license plate of the vehicle, so that only the frame including the license plate of the vehicle may be stored as a high resolution image file.

In addition, when the vehicle detects an excessive number of vehicles in a situation such as driving on a city road, the event detector determines the frequency of occurrence of the event. You can save it as a video file. This means that the compression of an image file can increase the capacity greatly, rather than the compression of a video file, if the number of frames is large, so that the compression of the video file is efficient to store a large number of frames.

In addition, without using an event detector, it is also possible to store a high-resolution image taken at a certain time. In the case of storing high resolution image files at regular time intervals, there is an advantage of not having to provide an event detector, but since the importance is not determined, image files of important events cannot be obtained, or unnecessary screen images are stored in high resolution. There are disadvantages.

Referring to FIG. 5, a video recording system for storing selected frames in high resolution includes an image unit 310, an event detector 320, an image encoder 330, a video encoder 340, a processor 350, and a storage unit. 360 may be included.

First, the image unit 310 may include an image sensor 311 for capturing an image at a high resolution and an image signal processor 312 for down-sampling the image at a low resolution. The image signal processor may include an event set in advance by an event detector. If is not detected, the captured image may be downsampled into a low resolution video file.

The event detector 320 may detect occurrence of a preset event and occurrence frequency of the preset event in the captured image. In this case, the event may be set in advance by the user or the designer, such as vehicle detection, pedestrian detection, license plate detection, etc. Among them, the preset event may be detected by the event detector to generate an event.

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

The video encoder 340 may generate a video file by encoding the captured image. The image captured by the image sensor 311 of the image unit 310 may be down-sampled by the image signal processor 312 to encode a low-resolution video file having a relatively small amount of data. You can also encode high-definition video files.

The processor 350 encodes an image file photographed when the vehicle is driven and parked and stores the encoded image file in the storage unit. In addition, when the occurrence frequency of a predetermined event is detected at a predetermined frequency or less by the event detector 320, the processor 350 may encode the captured image using the image encoder 330 into a high resolution image file. When an event set in advance by the event detector is detected to exceed a certain frequency, the video encoder 340 may encode the captured image into a high resolution video file. In addition, when an event set in advance by the event detector does not occur, the processor 350 may encode an image captured by the video encoder 340 into a low resolution video file because no event occurs.

The storage unit 360 is a space for storing the captured image encoded by the video recording system, and may store data that is a substantial recording target. In general, the storage unit 360 uses a memory device such as a flash memory. Here, the storage 360 may store a high resolution image file encoded by the image encoder 330 or store a video file encoded by the video encoder 340.

In addition, the storage 360 may store metadata indicating information of the captured image, together with a high resolution image file. In this case, metadata is data that is given according to a predetermined rule to efficiently find and use desired information from a large amount of information, and is data that explains other data. Here, the metadata may be information such as time information, a name of a linked video file, 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 similar to that of the conventional black box system, and the image is compressed and stored. Specifically, the image captured by the image unit 310 may be selected by checking whether an event occurs in the event detector 320. At this time, the event may be set to the occurrence of the vehicle detection, vehicle license plate detection, pedestrian detection and the like. The captured image may be compressed and encoded by the video encoder 340 and stored in the storage 360.

In addition, the direction of the image data may be stored in the storage unit 360 after compressing a specific frame according to the instructions of the processing unit 350 to compress the image captured by the image unit 310 to an image file in the image encoder 330 have. Here, the image file to be stored is high resolution, but since only one frame is stored, the amount of data is relatively small compared to the video file.

Therefore, the video recorded with no event is saved as a low resolution video file.For the video with an event of a certain frequency or less, the frame at the time of event occurrence and the next frame at the time of event occurrence are displayed in high resolution. By storing as a file, it is possible to efficiently manage image files and moving picture files stored in the video recording system, and to provide a reliable vehicle video recording system that provides accurate information.

Referring to FIG. 6, the video recording system detects occurrence of an event, selects at least one frame, and stores the at least one frame as a high resolution image file. In this case, at least one of at least one of an occurrence time frame of the preset event and a frame immediately after the occurrence of the predetermined event may be selected and stored as an image file having a high resolution.

In addition, the event detector may detect the license plate of the vehicle, and select a frame including the license plate of the vehicle and store the frame as a high resolution image file.

And, it is preferable to store the frame in which the event does not occur among the captured images by compressing the low resolution.

Referring to FIG. 7, the video recording system may store a low resolution video file having a small capacity for an image in which an event does not occur. That is, by lowering the quality or resolution of the video file to generate a low resolution file, the limited storage space can be used more efficiently.

Here, the high resolution and the low resolution are relative concepts. First, while the low resolution has an advantage of a small amount of data, detailed information such as license plate letters of a vehicle may not be obtained. However, while high resolution has a large amount of data and is difficult to process such as storage, detailed information such as license plate letters of a vehicle can be obtained.

For example, if you set 1080p (1920x1080) as a high resolution and VGA (640x480) video as a low resolution standard, you can dramatically reduce the amount of data that needs to be stored on a micro SD card while recording similar information to existing black boxes. have.

Similarly, for example, when 1080p is set as a low resolution and 4k (3840x2160) as a high resolution standard, a clearer screen can be additionally stored while storing an image having the same resolution as a conventional black box. However, 4k video files have so much amount of data that it is impossible to save them on a micro SD card. Accordingly, by selectively storing only necessary frames, it is possible to store files of higher resolution than existing resolutions 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 devices and components described in the embodiments include, for example, processors, controllers, arithmetic logic units (ALUs), digital signal processors, microcomputers, field programmable arrays (FPAs), It may be implemented using one or more general purpose or special purpose computers, such as a programmable logic unit (PLU), 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 the execution of the software. For convenience of explanation, one processing device may be described as being used, but one of ordinary skill in the art will appreciate that the processing device includes a plurality of processing elements and / or a plurality of types of processing elements. It can be seen that it may include. For example, the processing device may include a plurality of processors or one processor and one controller. In addition, other processing configurations are possible, such as parallel processors.

The software may include a computer program, code, instructions, or a combination of one or more of the above, and configure the processing device to operate as desired, or process it independently or collectively. You can command the device. Software and / or data may be any type of machine, component, physical device, virtual equipment, computer storage medium or device in order to be interpreted by or to provide instructions or data to the processing device. Or may be permanently or temporarily embodied in a signal wave to be transmitted. The software may be distributed over networked computer systems so that they may be stored or executed in a distributed manner. Software and data may be stored on one or more computer readable recording media.

The method according to the embodiment may be embodied in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the media may be those specially designed and constructed for the purposes of the embodiments, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, 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 not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Although the embodiments have been described by the limited embodiments and the drawings as described above, various modifications and variations are possible to those skilled in the art from the above description. For example, the described techniques may be performed in a different order than the described method, and / or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different form than the described method, or other components. Or even if replaced or substituted by equivalents, an appropriate result can be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are within the scope of the claims that follow.

Claims

In the operating method of the video recording system,

Detecting whether a preset event has occurred;

Responsive to the occurrence of the preset event, checking whether the preset event has occurred below a predetermined frequency; And

In response to the preset event occurring below a predetermined frequency, selecting at least one frame from a captured image and storing the image as a high resolution image file

Operating method of a video recording system for storing the selected frame in a high resolution, characterized in that it comprises a.
The method of claim 1,

The preset event is

Event detector to detect a vehicle and generate an event

Operating method of a video recording system for storing the selected frame characterized in that the high resolution.
The method of claim 1,

Detecting whether or not the preset event has occurred

If the preset event does not occur, storing the captured image as a low resolution video file

Operating method of a video recording system for storing the selected frame in a high resolution, characterized in that it comprises a.
The method of claim 3,

Saving the captured image as a low resolution video file

Photographing an image at a high resolution with an image sensor; And

Downsampling and storing the image as a low resolution video file in an image signal processor;

Operating method of a video recording system for storing the selected frame in a high resolution, characterized in that it comprises a.
The method of claim 1,

Determining whether or not the predetermined event occurs below a certain frequency

Compressing the captured image and storing the captured image as a high resolution video file when the preset event occurs over a predetermined frequency

Operating method of a video recording system for storing the selected frame in a high resolution, characterized in that it comprises a.
The method of claim 2,

Selecting and storing the at least one frame as a high resolution image file

Detecting a license plate of the vehicle at an event detector; And

Selecting a frame including the license plate of the vehicle from the captured image and storing the frame as a high resolution image file

Operating method of a video recording system for storing the selected frame in a high resolution, characterized in that it comprises a.
The method of claim 1,

Selecting and storing the at least one frame as a high resolution image file

Storing at least one of at least one of an occurrence time frame of the preset event and a frame immediately after the occurrence of the predetermined event in the captured image as a high resolution image file;

Operating method of a video recording system for storing the selected frame in a high resolution, characterized in that it comprises a.
The method of claim 1,

The high resolution image file

Generating and storing a file separately from a video file of the captured image

Operating method of a video recording system for storing the selected frame characterized in that the high resolution.
The method of claim 1,

Selecting and storing the at least one frame as a high resolution image file

Storing metadata representing information of the photographed image together with the high resolution image file

Operating method of a video recording system for storing the selected frame characterized in that the high resolution.
The method of claim 1,

Interlocking with a dedicated viewer and displaying a corresponding image by reading the high resolution image file of a specific part when the user checks the video file

Method of operating a video recording system for storing the selected frame in a high resolution, characterized in that it further comprises.
In a video recording system,

An event detector for detecting occurrence of a preset event and a frequency of occurrence of the preset event;

An image encoder for generating a high resolution image file by selecting at least one frame from a captured image;

A processor configured to encode the photographed image by using the image encoder when the preset event is detected at a predetermined frequency or less by the event detector; And

A storage unit for storing the high resolution image file encoded by the image encoder

And a video recording system storing the selected frames in high resolution.
The method of claim 11,

The preset event is

Generating an event by detecting a vehicle in the event detector

A video recording system for storing selected frames at high resolution.
The method of claim 11,

Further comprising a video encoder for generating a video file by encoding the captured image,

The processing unit

Encoding the captured image into a low resolution video file using the video encoder when the event detector does not detect the preset event.

A video recording system for storing selected frames at high resolution.
The method of claim 11,

Further comprising a video encoder for generating a video file by encoding the captured image,

The processing unit

When the preset event is detected by the event detector more than a certain frequency, compressing the photographed image by using the video encoder and encoding the video into a high resolution video file.

A video recording system for storing selected frames at high resolution.
The method of claim 11,

An image sensor for capturing an image at a high resolution;

An image signal processor for down sampling the image at a low resolution

More,

The image signal processing unit down-samples the photographed image into a low resolution video file when the event is not detected by the event detector.

A video recording system for storing selected frames at high resolution.
The method of claim 12,

The image encoder is

Encoding a frame containing a license plate detected by the event detector into a high resolution image file

A video recording system for storing selected frames at high resolution.
The method of claim 11,

The image encoder is

Encoding at least one of at least one of an occurrence time frame of the preset event detected by the event detector and a frame immediately after the occurrence of the predetermined event;

A video recording system for storing selected frames at high resolution.
The method of claim 11,

The high resolution image file

A file is generated separately from the video file of the captured image and stored in the storage unit.

A video recording system for storing selected frames at high resolution.
The method of claim 11,

The storage unit

Storing metadata representing information of the photographed image together with the high resolution image file

A video recording system for storing selected frames at high resolution.