KR100350219B1 - System for writing image and method for writing image using communication network - Google Patents

Abstract

The present invention provides a time series information buffer for classifying the time series information according to an event state by referring to time series image information photographed continuously from a time series information obtaining means using a pointer, and the time series information buffer according to an event occurrence state. Time-series information buffer recording means for additionally recording time-series information and deleting time-series information out of a predetermined time domain, and forming a pointer according to the event state generated by the event detection signal from the event-sensing means, thereby providing a kit value in the event information. By applying a hash table that is given, an event recording buffer for sequentially recording event information to which a key value is applied, and whether or not an event is duplicated by event information recorded in the event recording buffer are classified for each classification. Management of the time series information Event management means for controlling the temporal difference generated in the lock function, time series information recording means for classifying the time series information before the event and time series information after the event obtained from the time series information obtaining means, and time series before the event And information classification and storage means for classifying the information and time series information after the event and storing the classified information.

Description

Image recording method through image recording system and network {System for writing image and method for writing image using communication network}

The present invention can efficiently manage image information recorded according to time series for a shooting target that requires management and monitoring, and apply such a management function of such event information to a video recording method using a network. A video recording system and a video recording method through a network.

In general, in the case of a surveillance camera system applied for the management and monitoring of financial institutions, major public offices, businesses, residential spaces, etc., the surroundings where the image capturing camera is installed are photographed, and the captured image is recorded on a predetermined image recording medium. It is intended to be used as a reference for analyzing situations (i.e. events) occurring in the places or areas that operators want to manage and monitor.

On the other hand, in the conventional surveillance camera system, since the analog signal from which the surrounding image is captured from the image capturing camera can be recorded on an analog image recording medium such as a video tape, the image captured as time passes as it is. Recording on a video recording medium makes it difficult to edit, correct, or delete photographs.

However, in recent years, the surveillance camera system adopts a digital recording method using a computer system to convert the video signal photographed from the video camera to a digital signal, so that it can be digitally stored in a recording medium for digital data storage. have.

However, in the surveillance camera system that stores the image information digitally as described above, an infinite size buffer device is required to process the image information captured in a continuous time series based on a predetermined recording time. There is a limit to the amount of memory to use the same semiconductor memory, there is a problem in the processing speed of the video information to utilize a large storage medium, such as a hard disk drive (built-in computer system), There is a problem in that it is disadvantageous in terms of real time processing.

In addition, in the current surveillance camera system, it is possible to record and record the surrounding image simply based on a predetermined recording time point according to the time series, so that it is possible to monitor the unusual situation (hereinafter referred to as an event) around the management and monitoring. It is not possible to efficiently maintain and record time series information, that is, image information before the event time point and image information after the event time point.

Moreover, not only is it difficult to efficiently control the video information of the redundant event generated infinitely from a predetermined recording time, but also it is generated in the state that the maintenance of the already recorded time series information and the recording of the new information are simultaneously performed. Complexity in data processing due to time difference is expected, but there is no means to solve this problem.

Accordingly, the present invention has been made in view of the above-described conventional circumstances, and an object thereof is to efficiently classify time series information continuously photographed over time with respect to a specific target area requiring management and monitoring according to an event occurrence state. Accordingly, the present invention provides a video recording system capable of classifying and recording information before and after an event.

It is another object of the present invention to control a continuous shooting operation of a target site requiring management and monitoring by using a network remotely through the network, and to capture the image information before the event and after the event occurrence The present invention provides a video recording method through a network for dividing information into a remote search and reproducing.

1 is a block diagram showing the configuration of a video recording system according to the present invention;

FIG. 2 is a view showing in detail the image data storage structure of the time series information buffer shown in FIG. 1; FIG.

3 is a view showing in detail the configuration of the time-series information buffer recording apparatus shown in FIG.

4 is a diagram schematically showing an event data storage structure of the event recording buffer shown in FIG. 1;

5 is a graph showing an event occurrence state according to the passage of time of the event recording buffer according to an embodiment of the present invention;

FIG. 6 is a diagram schematically illustrating a storage structure of data for an event occurring in a section in a dotted line box of the graph of FIG. 5;

7 is a view showing in detail the configuration of the event management apparatus shown in FIG.

8 is a graph showing a time difference between data of a time-series information buffer recording apparatus and a time-series information recorder according to a preferred embodiment of the present invention;

9 is a diagram showing the configuration of a network system for explaining a video recording method through a network according to the present invention;

10 is a view showing an example in which search information using a webcam is implemented through an internet website according to a preferred embodiment of the present invention;

FIG. 11 is a diagram illustrating an example in which a function of searching for before and after an event by applying a webcam according to an exemplary embodiment of the present invention is implemented through an Internet website.

<Description of the symbols for the main parts of the drawings>

10: time series information acquisition device, 12: time series information buffer,

14: time series information buffer recording device, 16: event detection device,

18: event recording buffer, 20: event management device,

22: time series recorder, 24: video classifier,

26: Video saver.

According to the video recording system according to the present invention to achieve the above object, time series information acquisition means for continuously photographing the peripheral image of the target area that needs a specific management and monitoring according to time series, and continuously from the time series information acquisition means A time series information buffer for classifying the time series information according to an event state by referring to the captured time series image information using a pointer, and additionally recording time series information in the time series information buffer according to an event occurrence state, and for a predetermined time A time series information buffer recording means for deleting time series information leaving an area, an event detecting means for detecting a specific event occurring at a location where the time series information obtaining means is installed, and generating an event detecting signal; Generated by By forming a pointer according to an event state and applying a hash table to which a kit value is assigned to the event information, an event recording buffer for sequentially recording the event information with a key value according to time, and recorded in the event recording buffer. Event management means for determining whether the event is duplicated by event information and managing by classification, and for controlling the time difference generated in the recording function of the time series information, time series information before and after the event obtained from the time series information obtaining means An image for classifying time series information before the event and time series information after the event according to a recording operation of the time series information recording means, and storing the classified information Image recording consisting of classification and storage means The system is provided.

In addition, according to the video recording method through the network according to the present invention in order to achieve the above-described object, a plurality of objects are installed in a specific target area that needs to be managed and monitored to continuously record and record the surrounding video over time A video recording system for monitoring with a camera comprising the steps of: when a recording command is performed for a plurality of cameras from a management computer terminal through a network, recording is started for the plurality of cameras via a network; Storing image information continuously recorded from the camera in a file system in the form of a file according to an event occurrence state, and storing a value indexed according to the event state in the image information in a database; and in the management computer terminal Start a network-specific web browser to the file system There is provided a video recording method through a network, which comprises searching and reproducing a file of stored video information into an image before an event and an image after an event.

Hereinafter, the image recording system according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of an image recording system according to the present invention.

As shown in FIG. 1, the image recording system according to the present invention includes a time series information obtaining apparatus 10, a time series information buffer 12, a time series information buffer recording apparatus 14, an event sensing device 16, and event recording. A buffer 18, an event management apparatus 20, a time series information recorder 22, an image classifier 24, and an image storage 26 are comprised.

The time series information acquiring device 10 is formed in the form of a video camera installed at a main location of a photographing target where management and monitoring are required, such as a bank, a major public office, a business, a residential residential space, and the like. The movie will be taken continuously.

In addition, the time series information buffer 12 is stored when storing the time series image information of the peripherally photographed continuously as time passes through the time series information obtaining apparatus 10 in the image storage device 26 as a main memory device. By referring to the address of the data, that is, by applying a pointer, it is possible to additionally record meaningful information related to the event status as standardized data for managing time series information.

Here, the time series information buffer 12 is a queue linked list (FIFO) having a first in first out (FIFO) structure as time passes, while information is dynamically generated and deleted, and information is linked through a pointer. Queue Linked List), the detailed structure of such time series information buffer 12 is shown in Table 1 below.

name Contents Data type Captuer_time Time series information generation period (yyyy / mm / dd hh: mm: ss) time struct Event_State Event Count integer Info_Address Time series information reference pointer unsigned char * Info_Size Time series information size (bytes) integer pNext_Node Next element reference pointer struct *

As shown in Table 1, the time series information buffer 12 refers to a time when time series information occurs, an event state at the time when time series information occurs, an information pointer for referencing time series information, a size of time series information, and the following elements. It consists of a pointer (Next-Node Pointer).

The time when the time series information is generated covers all times that can be expressed up to year / month / day and hour / minute / second, and the event state is the event detection device at the time when time series information is acquired by the time series information obtaining apparatus 10. The event input from (16) will have a value numbered according to its redundancy, and the time series information reference pointer will store an address on the image storage unit 26 where image data of time series information is stored, and the next element reference pointer. Remembers the address of another element of time series information.

On the other hand, the time series information buffer 12 is implemented in the form of an infinite buffer to continuously store the time series information that is generated dynamically over time, and the image before the event and the image after the event at the time of event detection According to the present invention, the structure of the infinite buffer is shown in FIG. 2.

As shown in FIG. 2, the time series information buffer 12 writes the image of frames # 1 (starting frame) to frame #n according to the image before the event, and when the event detection signal is input, the event. The video from frame # 1 (event frame) to frame #n (end frame) is written (# n + 1 to # n + n) from the time point at which the detection signal is input to the image after the event. n can be kept fluid at all times regardless of the size of the buffer.

Here, the time series information hopper 12 has a FIFO structure and a linked list structure, and time series information of one unit generated within a limited time area (b; bandwidth) based on an event occurrence period (e; Event Time). Infinite buffer type that repeats the addition and deletion of time series information within a certain time range [eb] to [e + b] to accommodate an unpredictable number n for (frame f). The relation to achieve this infinite buffer is as shown in Equation 1 below.

In the figure, the time-series information buffer recording device 14 is responsible for recording and deleting time-series information stored in the time-series information buffer 12, and further processing the time-series information buffer 12 into appropriate information. As shown in FIG. 3, an image adder 34 and an image delete manager 42 having a time generator 32, an image information integrator 36, and an image accumulation buffer 38 are provided. And an image deleting unit 40 having an image storing buffer 44.

In the time series information buffer recording apparatus 14, the time generator 32 tracks and writes the time when the time series information is obtained with respect to the image data 30 as the time series information, and integrates the image information of the image adding unit 34. The controller 36 determines an event state through the event management apparatus 20, generates standardized information data, accumulates it in the image storage buffer 38, and references the linked list structure to the time series information buffer 12. Will be stored sequentially.

The image deleting unit 40 is for deleting all the image information outside the limited time area (Bandwidth) from the information data accumulated in the image storage buffer 44 through the image deletion manager 42.

In the figure, the event detecting device 16 is composed of various types of sensor devices provided at a specific photographing target location in which the time series information obtaining apparatus 10 is installed, and various events occurring at the photographing target site ( For example, a power failure, an intruder occurrence, an alarm occurrence, and the like are detected and defined as an event occurrence situation, thereby generating an event detection signal accordingly.

In addition, when the event detection signal is detected from the event detection device 16, the event recording buffer 18 generates and stores the information of the event detection signal as standardized information. Detailed data states of are shown in Table 2 below.

name Contents Data type Event_Time Event occurrence time (yyyy / mm / dd hh: mm: ss) time struct File_Name File name of time series information to be saved (frame count) integer Event_State Event count unsigned char * pLink 다음 Event Information (address) struct *

As shown in Table 2, the event recording buffer 18 includes information on the event occurrence period up to year / month / day and hour / minute / second, and the capacity limit of the image storage device 26 in which time series information is stored. File name for the time series information stored in the video storage 26 to facilitate the overcoming and retrieval, event status meaning the sequence number of duplicate events, and pointer address indicating the next event element of the event information stored in the buffer. It consists of information.

Here, the event recording buffer 18 has a linked list structure similarly to the time series information buffer 12, and can be referred to by a key value for managing an organic and efficient event. And the key value is designed to be the lowest digit of the event occurrence number, and control is possible as ten key values for an infinite event. The structure of the event recording buffer 18 having such a key value is shown in FIG. As shown in 4.

As shown in FIG. 4, the event recording buffer 18 is added as data by keys classified in the key generator 50A by the event count. According to the key values (key0 to key9), each data (A0-1 to A0-n, A1-0 to A1-n, ... A9-0 to A9-n) is added as a linked list structure. The NULL value indicates the end of the data.

In the event recording buffer 18, information is added and deleted in the order in which the event information is generated, and it is possible to predict that the event linked to one key value is the first data event. The accumulation state over time of the write buffer 18 is as shown in FIG.

As shown in Fig. 5, in the event recording buffer 18, a series of duplicate events are accumulated in the buffer with an event sequence number, and when the duplicate event disappears, the sequence starts again from the first sequence number. The structure in the event record buffer 18, which can be represented in the form of a hash table, is stored in a duplicate event classified into key values. When up to 11 events are duplicated, the first key value (key1) is generated according to the order of occurrence. ) Event 1, the second key value (key2) is event 2, ... tenth key value (key0) is classified and accumulated to the event 10, the 11th event has the first key value (key1), the first key value (key1) is located at event 11. The deletion of the event processed as described above is performed in the order of event 1 to event 11, in the graph of FIG. 5, the data storage structure for the event generated in the section in the dotted box is shown in FIG. 6. As shown.

In the same figure, the event management apparatus 20 stores the event recording buffer 18 in order to prevent duplication of events generated within the time limit for the time series information recorded by the time series information buffer recording apparatus 14. By applying a key value to an infinite number of duplicated events using a hash table having 10 keys recorded in the), it is possible to efficiently manage information data stored in the image storage device 26 to effectively generate a complex event. It is to cope.

The event management apparatus 20 inspects the event information included in the hash table of the event recording buffer 18 to store time series information determined by the event detection signal in the image storage device 26. If there is a duplicate event, and if there is a duplicate event, the current event is determined based on the information in the hash table, and double processing of the duplicate event is prevented.

In addition, the event management apparatus 20 also performs a function of controlling the time difference generated within the clock synchronized with the time series information buffer recording apparatus 14 and the time series information recorder 22.

Here, as shown in FIG. 7, the event management apparatus 20 may include an event recorder configured to record standardized event information when an event occurs with respect to time series information recorded by the time series information buffer recording apparatus 14. 52), and an event discriminator 54 for searching for and deleting an event that is the subject of an event, an event to be processed currently, and an event outside of a limited time bandwidth.

Meanwhile, hereinafter, a control algorithm for event control is expressed in PDL (Program Design Language).

-------------------------------------------------- ---------------------

loop

Keep time series information to be written in buffer

If check event state is true

If record state is true

Event count increase

Else

Event count set one

Decide key to reference event count, add event information in hash table

Event state set false

Record state set event count

Else Do not anything

If check record state is true

Decide current event

save time series information in Database or Hard disk

If the bandwidth is overflow and Event State is the last

Record state set false

Event count set zero

Remove current event information in hash table

Else Do not anything

End loop

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The control algorithm for the event control is a combination of the management of the event and time series information in a state in which the operations of the event management apparatus 20, the time series information buffer recording apparatus 14 and the time series information recorder 22 are performed under the same synchronization. As a result, the process includes checking the state of the event to record event information in a buffer, determining and processing an event to be processed currently through a state variable (record state), and deleting the processed event information.

On the other hand, the reason for separating the process of adding and deleting the event information as described above is shown in Figure 8 frame data in the time series information buffer recording device 14 and the frame in the time series information recorder 22 This is due to the difference in the limited bandwidth between the data.

In the same figure, the time series information recorder 22 stores time series information including a plurality of overlapping events and past information from a time series in image information of a time series obtained from the time series information buffer recording apparatus 14. 24) and the image storage unit 26 to store them separately.

Here, the image classifier 24 functions as a database as an external storage device, and the image storage device 26 is a hard disk drive applied to a computer system.

Next, the video recording method via a network according to the present invention will be described in detail with reference to the accompanying drawings.

9 is a diagram showing the configuration of a network system for explaining a video recording method through a network according to the present invention.

As shown in FIG. 9, in the video recording method through the network according to the present invention, a method of classifying and storing consecutive time series information applied to the video recording system of the present invention shown in FIG. It can be controlled remotely on the same network.

In the figure, a network system to which the method of the present invention is applied is a network server 62 having a management computer terminal 60, a webcam management agent system 64, a file system 66, and a database 68, and a plurality of network systems. Cameras C1 to Cn.

The management computer terminal 60 instructs the network server 62 to start and end recording commands of surrounding images for the plurality of cameras C1 to Cn through a network such as an Internet communication network, The image information stored in the database 68 of the network server 62 by being photographed by the cameras C1 to Cn is operated to be received and viewed.

The webcam management agent system 64 of the network server 62 is configured such that a web browser operated in the management computer terminal 60 and the plurality of cameras C1 to Cn are connected to each other to operate. When there is a recording request from the computer terminal 60, the request information is stored in the database 68, and a signal capable of recording the information of the database 68 checked by the Webcam Capture Demon program. When is changed to, recording processing by a plurality of cameras C1 to Cn is performed.

In addition, the webcam management agent system 64 classifies the video information recorded from the plurality of cameras C1 to Cn through a network into a file according to an occurrence state of an event, and stores the information into a file system 66. In the state of storing the indexed value according to the event state in the database 68, upon receiving a request for receiving the recorded video information from the management computer terminal 60, it is recorded from the plurality of cameras C1 to Cn. The video information is classified into a video before the event and a video after the event, and played back.

An example of a screen of a web browser for retrieving and reproducing a file of image information stored in the file system 66 for each type of camera and for each time is shown in FIG. 10.

In addition, an example of a screen of a web browser for retrieving and reproducing the image before the event and the image after the event in the event state generated during the capturing of the surrounding images by the plurality of cameras C1 to Cn is illustrated in FIG. 11. As it is.

As described above, according to the present invention, a search result for each event can be obtained by applying a function for classifying and storing time series information according to an occurrence of an event to a surveillance recording system, and the image before and after the event. It can have the effect of inferring the relationship between detailed frames by dividing.

In addition, according to the present invention, by using a network to build a webcam system that enables the control and search of the camera at a remote location, the video information recorded from the camera can be divided into a pre- and post-event video after searching online, It has the effect that various applications using webcam system are possible.

Claims (2)

Time-series information acquisition means for continuously photographing the surrounding image of the target area requiring specific management and monitoring according to time-series; A time series information buffer for classifying and storing time series information according to an event state by referring to time series image information continuously photographed from the time series information obtaining unit using a pointer; Time-series information buffer recording means for additionally recording time-series information in the time-series information buffer according to an occurrence state of an event, and deleting time-series information out of a predetermined time zone; Event detection means for detecting a specific event occurring at a location where the time series information acquisition means is installed and generating an event detection signal; By forming a pointer according to the event state generated by the event detection signal from the event detecting means and applying a hash table to which a key value is assigned to the event information, event information to which the key value is applied is sequentially recorded over time. Event recording buffer, Event management means for determining whether or not an event overlaps according to the event information recorded in the event recording buffer for each category, and for controlling a time difference generated in the recording function of the time series information; Time series information recording means for classifying the time series information before the event and the time series information after the event obtained from said time series information obtaining means; And classifying and storing means for classifying time series information before an event and time series information after an event according to a recording operation of the time series information recording means, and storing the classified information. In the surveillance video recording system provided with a plurality of cameras that are installed in a specific target area that needs to be managed and monitored, and that continuously records and records the surrounding video over time, When a recording command for the plurality of cameras is performed from a management computer terminal through a network, recording of the plurality of cameras is initiated through a network; Storing image information continuously recorded from the camera in a file system in the form of a file according to an event occurrence state, and storing a value indexed according to the event state in the image information in a database; A network comprising a step of operating a web browser dedicated to the network in the management computer terminal to search for and reproduce a file of image information stored in the file system into an image before an event and an image after an event. Video recording method through.