KR101716109B1 - Method for time synchronization of a plurality of images and system displaying multi-images - Google Patents

Abstract

A time synchronization method for a plurality of images and a multi-image playback system using such a method are disclosed. A method for time synchronization of a plurality of images includes the steps of: receiving a plurality of pieces of image information generated by a plurality of image capturing apparatuses in a multi-image reproducing system; The method comprising the steps of: classifying a plurality of pieces of image information into a plurality of image information groups based on each of a plurality of classifiers; and determining a plurality of image information groups based on each of the plurality of classifiers, And reproducing them in time synchronization on each of them.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time synchronization method for a plurality of images, and a multi-

The present invention relates to an image processing method and apparatus, and more particularly, to a time synchronization method for a plurality of images and a multi-image reproduction system using the method.

Today, surveillance of facilities or areas is based on multiple closed circuit television (CCTV). In order to facilitate monitoring and post-reading through the acquired image, techniques for dividing each image file into a plurality of reproduction regions for each camera and simultaneously reproducing the divided regions are widely utilized.

This simultaneous playback technology can be applied instantaneously in the case where the image captured in CCTV is unique, but in the case where the image captured in CCTV is not unique (if there are plural images in each CCTV), it is determined which image is to be reproduced at a specific reproduction time A process is required.

For example, image data reconstructed from defects in a storage device of image data may be fragmented into separate files, even though images taken by the same camera are missing, and image data between normally reconstructed images of different time periods may be separated. The image files can be classified according to the camera in which each file is acquired, and at the same time, a plurality of image files can be acquired from one camera. A plurality of image files acquired by one camera are image files generated at different times.

It is necessary to consider a method for reproducing a plurality of images captured by a plurality of image capturing apparatuses on a single screen in synchronism with each other.

KR 10-2008-0131664

One aspect of the present invention provides a time synchronization method for a plurality of images.

Another aspect of the present invention provides a multi-image reproduction system using a time synchronization method of a plurality of images.

According to an aspect of the present invention, there is provided a time synchronization method for a plurality of images, the method comprising: receiving a plurality of pieces of image information generated by a plurality of image capturing apparatuses in a multi-image reproduction system; The method comprising the steps of: classifying the plurality of image information into a plurality of image information groups based on each of a plurality of classification symbols included in each of the plurality of metadata of the plurality of image information groups; And reproducing the at least one video information in time synchronization on each of the plurality of lower playback units.

Each of the plurality of metadata further includes a start time of each of the plurality of video information and an end time of each of the plurality of video information, and the number of the plurality of lower playback parts is the same as the number of the plurality of classification symbols can do.

In addition, the step of synchronizing and reproducing by time synchronization may include capturing an image at a set reproduction time of the plurality of pieces of image information based on a start time of each of the plurality of pieces of image information of each of the plurality of meta data, Extracting the at least one image information and reproducing the at least one image information according to the set reproduction time.

The step of classifying the plurality of pieces of image information into the plurality of image information groups may include extracting the plurality of pieces of metadata of the plurality of pieces of image information and storing them in a first storage unit, And classifying the plurality of metadata based on each of the plurality of classification symbols included in the plurality of classification symbols and storing the classified metadata in the second storage unit to determine the plurality of image information groups.

In addition, when the first temporal length for capturing the at least one image information and the second temporal length for reproducing the at least one image information do not match, the playback speed of the at least one image information may be adjusted So that the first temporal length and the second temporal length can be matched.

According to another aspect of the present invention, there is provided a multi-image reproducing system for performing time synchronization of a plurality of images, the multi-image reproducing system comprising: a processor for receiving a plurality of image information generated by a plurality of image pickup devices, Information on the plurality of image information groups is classified into a plurality of image information groups by classifying the plurality of image information based on each of a plurality of classifiers included in each of a plurality of pieces of metadata of each of the plurality of image information groups, Information can be reproduced in time synchronization on each of the plurality of lower reproducing parts.

Each of the plurality of metadata further includes a start time of each of the plurality of video information and an end time of each of the plurality of video information, and the number of the plurality of lower playback parts is the same as the number of the plurality of classification symbols can do.

In addition, the processor may be configured to determine, based on the start time of each of the plurality of pieces of video information and the end time of each of the plurality of pieces of video information, Extracting the image information, and reproducing the at least one image information according to the set reproduction time.

The processor may extract the plurality of metadata of the plurality of pieces of image information and store the plurality of pieces of metadata in a first storage unit and store the plurality of metadata on the basis of each of the plurality of classification symbols included in each of the plurality of metadata And storing the image information in the second storage unit to determine the plurality of image information groups.

In addition, when the first temporal length for capturing the at least one image information and the second temporal length for reproducing the at least one image information do not match, the playback speed of the at least one image information may be adjusted So that the first temporal length and the second temporal length can be matched.

A time synchronization method for a plurality of images according to an embodiment of the present invention and a multi-image playback system using such a method are characterized in that a plurality of image files generated by each of the plurality of image pickup devices are time- And can be output on one screen.

1 is a conceptual diagram showing a multi-image reproducing system according to an embodiment of the present invention.
2 is a conceptual diagram illustrating a synchronization operation of the multi-image playback system according to the embodiment of the present invention.
3 is a conceptual diagram illustrating an operation of the reproduction control unit according to the embodiment of the present invention.
4 is a conceptual diagram illustrating a multi-image playback system according to an embodiment of the present invention.
5 is a conceptual diagram illustrating an image synchronization method according to an embodiment of the present invention.
6 is a conceptual diagram illustrating an effective method for reproducing a plurality of video information according to an embodiment of the present invention.
7 is a conceptual diagram illustrating a method for efficiently reproducing a plurality of pieces of image information according to an embodiment of the present invention.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

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

A method and apparatus for time synchronization of a plurality of images captured by a plurality of image capturing apparatuses in accordance with an embodiment of the present invention is a method and apparatus for time synchronizing and reproducing a plurality of image information captured and generated by a plurality of image capturing apparatuses A method is disclosed.

Each of the plurality of image pickup devices may have a plurality of image information. For example, the camera 'A' may generate the image file 1, the image file 2, and the image file 3 as an image pickup result, and the camera 'B' may generate the image file 4, the image file 5, can do. In the time synchronization method for a plurality of images captured by a plurality of image capturing apparatuses according to the embodiment of the present invention, a method for extracting image information captured at a specific time (T) in a camera A and a camera B is disclosed.

That is, in reproducing a plurality of image files generated as image pickup results by a plurality of image pickup apparatuses, an image picked up by a plurality of image pickup apparatuses on one screen is outputted, The image captured by the plurality of image capturing apparatuses may be outputted in accordance with the flow of time based on the time synchronization so that the captured image may be the time.

That is, the time synchronization method of a plurality of images captured by the plurality of image capturing apparatuses according to the embodiment of the present invention can automatically extract and reproduce a plurality of images captured by the plurality of image capturing apparatuses in a timely correct order .

Further, in the time synchronization method of a plurality of images captured by the plurality of image capturing apparatuses according to the embodiment of the present invention, when the reproduction time of the image information does not coincide with the image capturing execution time, The reproduction time of the information and the image capturing execution time can be matched.

1 is a conceptual diagram showing a multi-image reproducing system according to an embodiment of the present invention.

1, the multi-image reproducing system includes a video input unit 100, a playback control unit 110, a multi-video synchronization unit 120, a playback unit 130, a video file management unit 140, and a processor (not shown) .

The video input unit 100 may be implemented to input a plurality of pieces of image information captured by the plurality of image capturing apparatuses to the multi-video synchronization unit 120. The plurality of pieces of image information input to the video input unit 100 may be classified and classified based on the image capturing time of the image capturing apparatus and the image information generating the image information.

The video input unit 100 may transmit an image file, which is classified and classified based on the image capturing device and the image capturing time of the image information, to the multi-video synchronizing unit 120. For example, the format of the image file may be H.264 format.

The reproduction control unit 110 may be implemented to control the number of divisions of the reproduction unit 130 (or the number of the lower reproduction units included in the reproduction unit) and the video information to be reproduced on the reproduction screen. The multi-video synchronization unit 120 may synchronize a plurality of video information set by the playback control unit.

Further, the reproduction control section 110 supplies information on the identifier (for example, camera number) of the image capturing apparatus, the capturing date of the image information, the capturing start time of the image information, 120). In addition, the playback control unit 110 may select and control video information (or image files) to be input through the video input unit 100.

The multi-video synchronization unit 120 may perform time synchronization on a plurality of pieces of video information based on the control information received from the playback control unit 110 and the plurality of pieces of video information input from the video input unit 100. [ The plurality of pieces of image information synchronized by the multi-video synchronizing unit 120 may be transmitted to the reproducing unit 130. [

The playback unit 130 may be implemented to play back a plurality of pieces of video information synchronized by the multi-video synchronization unit 120 according to time synchronization. The playback time of the plurality of pieces of video information in the playback unit may be set by manipulation of a time bar or by input of direct time information so that a plurality of pieces of video information can be played back. The playback unit 130 may include a plurality of lower playback units, and each of the plurality of synchronized video information may be played back in each of the plurality of lower playback units. Each of the plurality of lower playback units can play back each of the plurality of pieces of image information classified by the classification symbol.

The video file management unit 140 may be used to change the format of the video information into another format. For example, the video file management unit 140 may be implemented to convert image information having the H.264 file format into another file format (for example, avi format).

A processor (not shown) may be implemented to control operations of the video input unit 100, the playback control unit 110, the multi-video synchronization unit 120, the playback unit 130, and the video file management unit 140.

When synchronization of a plurality of pieces of image information is performed, a plurality of pieces of image information can be reproduced in time synchronization with one program.

Specifically, a multi-image reproducing system receives a plurality of pieces of image information generated by a plurality of image capturing apparatuses, and a plurality of pieces of metadata (for example, classification symbols) included in each of a plurality of pieces of metadata of each of the plurality of pieces of image information, The plurality of image information may be classified into a plurality of image information groups based on the plurality of image information. The multi-image reproducing system can reproduce at least one piece of image information included in each of the plurality of image information groups in time synchronization on each of the plurality of lower reproducing sections.

According to an embodiment of the present invention, when time synchronization is performed on a plurality of pieces of image information, the playback time of another image can be determined based on an image that is first started in time. When there is no image information captured by the specific image capturing apparatus at a specific time during the time synchronization of a plurality of image information generated by the plurality of image capturing apparatuses, no signal is displayed, Can be displayed.

2 is a conceptual diagram illustrating a synchronization operation of the multi-image playback system according to the embodiment of the present invention.

Referring to FIG. 2, the multi-image playback system may be implemented to receive image information to be reproduced from a plurality of image devices and to extract and classify metadata of the image information. The above operation may be performed by a playback image selection module implemented in the video input unit or the playback control unit.

The first storage unit 210 of the multi-image playback system may store metadata of a plurality of received video information. The image classification module may analyze and classify each of the plurality of metadata of each of the plurality of image information. The analyzed and categorized metadata may be stored in the second storage unit 220 of the multi-image playback system.

The metadata of the plurality of image information stored in the first storage unit 210 may be extracted and analyzed and stored in the second storage unit 220. The metadata may include a playback start time of the video information, a playback end time of the video information, information on the video apparatus that captured the video information, and classification symbol information. The classification symbol information may be reference information for synchronization of the image information. For example, image information having the same classification code can be reproduced in one lower reproduction section included in the reproduction section.

For example, the reproduction control section (or the separate constituent section) can set a plurality of pieces of video information (or a plurality of video image capturing devices to be simultaneously reproduced) to be simultaneously reproduced in each of the plurality of lower reproducing sections included in the reproducing section , Each of the plurality of video information to be reproduced in time synchronization with each of the plurality of lower playback units can be assigned the same classification symbol information. A plurality of pieces of image information having the same classification symbols assigned thereto may be output from one of the plurality of lower image reproducing units included in the reproducing unit. The reproducing unit may include a lower image reproducing unit as many as the sort symbols of the metadata stored in the second storing unit.

3 is a conceptual diagram illustrating an operation of the reproduction control unit according to the embodiment of the present invention.

Referring to FIG. 3, the reproduction control unit may control the image information corresponding to a specific classification symbol to be reproduced at a specific reproduction time based on the classified metadata stored in the second storage unit.

The reproduction control unit extracts image information corresponding to the metadata corresponding to the specific classification symbol (step S300).

As described above, the metadata corresponding to a specific classification symbol may be classified and stored in the second storage unit, and the reproduction control unit may cause the video input unit to input the video information for the metadata corresponding to the specific classification symbol to the multi- Can be controlled.

The reproduction control unit controls the video information to be reproduced at a position corresponding to a specific reproduction time (step S310).

The reproduction control unit may be implemented to reproduce the image information determined based on the step S300 on the basis of a specific reproduction time point. The specific playback point may be the time point between the total playback start time and the total playback end time.

The total reproduction start time may be the earliest reproduction start time among the metadata stored in the first storage unit and the synthetic reproduction end time may be the latest reproduction end time among the metadata stored in the first storage unit. The current playback time is a time between a total playback start time and a total playback end time, and may increase in real time during playback.

The multi-video synchronization unit may perform a synchronization procedure so that a plurality of images can be reproduced in each of a plurality of lower playback units included in the playback unit based on a specific playback time.

More specifically, the multi-video synchronizing unit may assume the reproduction start time and the reproduction end time of the moving picture data as A and B and the specific reproduction time (or the current reproduction time) as C. In this case, a plurality of pieces of image information including C satisfying the relationship of A? C? B can be extracted, and each of the plurality of pieces of image information is synchronized with a specific reproduction point C as a reference, Can be output from each of the plurality of lower reproducing portions of the reproducing portion corresponding to the reproducing portion.

For example, assuming that the reproduction start time of the currently reproduced image information is A, the reproduction end time of the currently reproduced image information is B, and the specific reproduction time is C, the reproduction length of the image information is BA, The images positioned at the time when the image is displayed can be outputted in synchronization with each other.

When the above method is used, a plurality of pieces of video information (for example, H.264 file) extracted from the CCTV are transmitted to a plurality of sub-playback screens (or sub- Reproducing section).

Existing players can view only one image in one program. However, in the method and apparatus for time synchronization of a plurality of images according to the embodiment of the present invention, a plurality of images captured by a plurality of image capturing apparatuses The images can be reproduced simultaneously in time synchronization. The user can easily reproduce an image by selecting a folder stored for each camera and a shooting date. Also, the number of divisions of the screen can be selected, and a plurality of synchronized images can be searched by moving the time bar and inputting the direct time. Of course, a plurality of images to be reproduced at the time of searching can be reproduced in synchronization with time.

4 is a conceptual diagram illustrating a multi-image playback system according to an embodiment of the present invention.

In Fig. 4, the multi-image reproducing system can receive a plurality of pieces of image information (or a plurality of image files). The multi-image reproduction system can classify a plurality of received image information.

The multi-image reproducing system classifies a plurality of pieces of image information on the basis of the image pickup device (step S400).

When there is a plurality of pieces of image information captured by the image capturing apparatuses 1 to 10, the multi-image capturing system can classify each of the plurality of pieces of image information on the basis of the image capturing apparatus.

The metadata of each of the plurality of pieces of image information may include information on the image capturing apparatuses each of which has generated the plurality of pieces of image information, Can be classified based on the image pickup device. The information on the image capturing apparatus that has generated each of the plurality of pieces of image information in the metadata may be the above-mentioned classification symbol.

The multi-image reproducing system classifies the image information having the same classification symbol in consideration of time information (step S410).

The multi-image reproducing system can classify a plurality of image information having the same classification symbol on the basis of time information. For example, a primary classification is performed on the basis of dates, and when a plurality of pieces of image information are not classified based on dates, a plurality of pieces of image information that are not classified can be divided into smaller time units (for example, Etc.). For example, when image capturing is performed for one week by the image capturing apparatus 1, seven pieces of image information can be generated for each date. In this case, the seven pieces of image information can be classified into date units.

Or additional metadata for synchronization may be defined and multiple pieces of image information having the same classification criteria may be categorized based on additional metadata for additional synchronization.

5 is a conceptual diagram illustrating an image synchronization method according to an embodiment of the present invention.

5, a method of adding synchronization information as metadata to each of a plurality of pieces of image information for synchronizing a plurality of images is disclosed.

Referring to FIG. 5, a plurality of image capturing apparatuses may operate on the basis of the same reference time to generate a plurality of image information. The plurality of pieces of image information may include metadata for synchronization. The metadata for synchronization may include first synchronization information 500 set in a first time unit, and second synchronization information 520 set in a second time unit. The first time unit may be a time unit larger than the second time unit.

For example, the first time unit may be the first synchronization information 500 generated in units of 10 minutes, and the second time unit may be the second synchronization information 520 that changes in units of one minute.

The plurality of pieces of image information can perform synchronization based on the metadata for such synchronization.

The reproduction control unit can find the first synchronization information 500 and the second synchronization information 510 corresponding to a specific playback point input by the user. The first synchronization information 500 indicating 20 minutes in each of the plurality of pieces of image information and the second synchronization information 510 indicating 4 minutes in the plurality of pieces of image information are stored in the meta information memory It is possible to find the lower image information with the data and find the image corresponding to 34 seconds thereafter. If such a method is used, it is possible to synchronize each of a plurality of pieces of image information more quickly.

In addition, the multi-image playback system can provide a function of quickly skipping a plurality of pieces of image information in order to find a specific playback point by skipping and synchronizing the plurality of pieces of image information, and this function can be realized by the first synchronization information 500 and / Information < RTI ID = 0.0 > 510 < / RTI > The user can set a time corresponding to the first synchronization information 500 and a time corresponding to the second synchronization information 510. The user can set a time point corresponding to the first synchronization information 500, The time corresponding to the information 510 may be adaptively changed and stored as metadata. The user can skip while keeping the synchronization of a plurality of pieces of image information by setting the degree of skipping desired by the user.

6 is a conceptual diagram illustrating an effective method for reproducing a plurality of video information according to an embodiment of the present invention.

6 shows a method for an administrator to more effectively view a reproduction screen of a plurality of pieces of video information when a plurality of pieces of video information are output from one screen.

Referring to FIG. 6, in the multi-image reproducing system, a plurality of pieces of image information reproduced by performing synchronization at a specific reference time may be re-synchronized and redistributed in consideration of a reproduction time of each of a plurality of pieces of image information.

For example, it may be assumed that a specific reference time is set as a video playback start point and video information 1 610, video information 2 620, video information 3 630, and video information 4 640 are reproduced have. At this time, the end points of the image information 1 610, the image information 2 620, the image information 3 630, and the image information 4 640 may be different from each other. In this case, synchronization may be re-performed during playback.

For example, when the end point of the image information 1 610 is the first point of view 615, the end point of the image information 2 620 is the second point of time 625, and the end point of the image information 3 630 is And the end point of the image information 4 640 may be the fourth point of time 645. [ In this case, each of the image information 1 610, the image information 2 620, the image information 3 630, and the image information 4 640 includes a first point of view 615, a second point of view 625, 635, and the fourth time point 645 in this order. At this time, synchronization and screen redistribution may be performed at the first point of view 615, the second point of view 625, the third point of view 635, and the fourth point of view 645.

For example, when the first video information 610 is terminated at the first time 615, the synchronization of the video information 2 620, the video information 3 630, and the video information 4 640 is re- Information 2 620, image information 3 630, and image information 4 640 may be output on the screen. The lower playback unit corresponding to the video information 1 610 displays the NO SIGNAL screen or the screen of the lower playback unit corresponding to the video information 1 610 disappears and the video information 2 620, Information 4 640 may be relatively expanded and output on one screen.

In the same manner, when the image information 2 620 is terminated at the second time point 625, the synchronization with respect to the image information 3 630 and the image information 4 640 is performed again and the image information 3 630 and the image information 630 4 (640) may be output on the screen. The lower playback unit corresponding to the video information 2 620 displays the NO SIGNAL screen or the screen of the lower playback unit corresponding to the video information 2 620 disappears and the video information 3 630 and the video information 4 640 The corresponding lower reproduction portion can be relatively expanded and output on one screen.

When the resynchronization procedure for the image information with the end time remaining is performed, more accurate synchronization between images can be performed and the utilization of the screen can be increased.

7 is a conceptual diagram illustrating a method for efficiently reproducing a plurality of pieces of image information according to an embodiment of the present invention.

In FIG. 7, when specific image information does not exist for a predetermined time, an image synchronization method is disclosed.

7, it can be assumed that the image information 1 710, the image information 2 720, and the image information 3 730 exist and the image information 2 720 does not exist for a predetermined period of time.

For example, the intermediate image information 2 720, in which the image information 1 710, the image information 2 720, and the image information 3 730 are reproduced in synchronization with the first time 715, ).

In this case, the reproduction of the video information 2 720 may be temporarily stopped at the second time 725, which is the start point of the first time interval 750, The output of the information 2 720 can be stopped. When the output of the video information 2 720 is stopped, the lower playback portion corresponding to the video information 2 720 disappears and the screen of each of the lower playback portions corresponding to the video information 1 710 and the video information 3 730 Can be increased.

The synchronization of the image information 1 710, the image information 2 720 and the image information 3 730 may be performed again at a third time 735 which is an end point of the first time interval 750. After synchronization, the lower playback portion corresponding to the video information 2 720 can be generated again, and the size of the screen of each of the lower playback portions corresponding to the video information 1 710 and the video information 3 730 is reduced again .

The time synchronization method for a plurality of images may be implemented in an application or in the form of program instructions that can be executed through various computer components and recorded in a computer-readable recording medium. The computer-readable recording medium may include program commands, data files, data structures, and the like, alone or in combination.

The program instructions recorded on the computer-readable recording medium may be ones that are specially designed and configured for the present invention and are known and available to those skilled in the art of computer software.

Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, 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 generated 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 device may be configured to operate as one or more software modules for performing the processing according to the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be possible.

Claims (10)

delete A time synchronization method for a plurality of images,
The method comprising: receiving a plurality of pieces of image information generated by a plurality of image pickup devices;
The multi-image reproduction system classifies the plurality of image information based on each of a plurality of classification symbols included in each of a plurality of metadata of each of the plurality of image information, and determines the plurality of image information groups as a plurality of image information groups; And
And the multi-image reproducing system includes a step of synchronizing and reproducing at least one image information included in each of the plurality of image information groups on each of a plurality of sub-reproducing units,
Wherein each of the plurality of metadata further includes a start time of each of the plurality of image information and an end time of each of the plurality of image information,
Wherein the number of the plurality of lower playback units is equal to the number of the plurality of classification symbols. 3. The method of claim 2, wherein the time-
Extracting the at least one piece of image information photographed at a set reproduction time of the plurality of pieces of image information based on a start time of each of the plurality of pieces of image information of each of the plurality of meta data and an end time of each of the plurality of pieces of image information step; And
And reproducing the at least one video information according to the set playback time. 4. The method of claim 3, wherein the step of classifying the plurality of pieces of image information into the plurality of image information groups comprises:
Extracting the plurality of metadata of the plurality of pieces of image information and storing the extracted metadata in a first storage unit; And
And classifying the plurality of metadata based on each of the plurality of classifiers included in each of the plurality of metadata and storing the classified metadata in the second storage unit to determine the plurality of image information groups . 5. The method of claim 4,
Wherein the controller controls the playback speed of the at least one video information when the first temporal length for capturing the at least one image information and the second temporal length for reproducing the at least one video information do not match, Wherein the first temporal length matches the second temporal length. delete A multi-image reproducing system for performing time synchronization of a plurality of images,
The multi-image playback system includes a processor,
The processor receives a plurality of pieces of image information generated by a plurality of image pickup devices,
The plurality of image information is classified into a plurality of image information groups based on each of a plurality of classification symbols included in each of a plurality of metadata of each of the plurality of image information,
And reproducing at least one piece of video information included in each of the plurality of video information groups in time synchronization on each of the plurality of sub-
Wherein each of the plurality of metadata further includes a start time of each of the plurality of image information and an end time of each of the plurality of image information,
Wherein the number of the plurality of lower playback units is equal to the number of the plurality of classification symbols. 8. The method of claim 7,
Wherein the processor is configured to generate the at least one video information, which is captured at a predetermined playback time of the plurality of pieces of video information, based on a start time of each of the plurality of pieces of video information and an end time of each of the plurality of pieces of video information, Respectively,
And reproducing the at least one video information according to the set playback time. 9. The method of claim 8,
Wherein the processor extracts the plurality of metadata of the plurality of pieces of image information and stores the extracted metadata in a first storage unit,
Wherein the plurality of metadata groups are classified based on each of the plurality of classifiers included in each of the plurality of metadata and stored in the second storage unit to determine the plurality of image information groups. system. 10. The method of claim 9,
Wherein the controller controls the playback speed of the at least one video information when the first temporal length for capturing the at least one image information and the second temporal length for reproducing the at least one video information do not match, Wherein the first temporal length and the second temporal length are matched with each other.

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