KR101119842B1 - Apparatus and method for detecting the sorce frame error - Google Patents

Abstract

PURPOSE: An apparatus for detecting source frame error and a method thereof are provided to easily determine source video effor. CONSTITUTION: A sudden change maintenance determining unit(30) determines whether a sudden change frame is maintained for a predetermined period and whether the sudden change is generated for the predetermined period. A source image fault discriminating unit(40) receives determination result of the sudden change maintenance determining unit. If the sudden change continuously occurs for the predetermined period, the source image fault discriminating unit determines the state as a source image error state.

Description

Apparatus and method for determining a source image failure in a remote video system and a recording medium incorporating a program for performing the method {APPARATUS AND METHOD FOR DETECTING THE SORCE FRAME ERROR}

The present invention relates to an apparatus and method for determining a source video failure of a remote video system, and more particularly, to whether or not there is an error in video information collected from a camera scattered in a remote location in a network-based remote video system (CCTV monitoring system). The present invention relates to an apparatus and method for determining a source image disorder.

CCTV is a television transmission system that transmits an image to a specific receiver and is an abbreviation of closed-circuit television.

Network video record (NVR) systems that store video information of CCTVs generally do not identify video signal transmission failures in network video record streaming (NVRS) servers, failures due to lack of storage space, network disconnection, etc. This is done by manually searching for each video stored in the storage server at periodic time points.

1 is a schematic diagram of a conventional NVR system.

Referring to FIG. 1, in order to collect image information of a position to be collected, a plurality of image input devices 100 are installed at a desired position. The video input device may be provided with an analog camera and / or a digital camera. Video information collected by the video input device is stored in an NVRS server (Network Video Record Streaming Server) 200 through a communication network such as a WAN / LAN. NVRS server is installed at each base and stores video information collected from multiple video input devices.

In the conventional NVR system as described above, in the event of a failure such as a video signal transmission failure, a lack of storage space, or a network disconnection, the administrator recognizes and identifies the failure by visual inspection of the administrator. It is true.

Video information collected through video input devices (cameras, etc.) scattered throughout the area is stored in the NVRS server in each region, where abnormal video information is recorded / stored, or video information is not stored for a certain time. Source image disturbances may occur. In this case, in the conventional NVR system, the stored video (video) stream is visually checked by the operator / manager through the connection of the viewer (S / W or H / W) or as a log that has not been stored. This method is not only inefficient, but also has to be confirmed by the operator / manager, and when the operator / manager does not check, the wrong source image is continuously generated.

In order to achieve the above object of the present invention, an object of the present invention is to abnormally store the image or the image is not stored in the remote video server stored in the image information collected from the individual image input device in the remote video system The present invention provides an apparatus and method for determining a source image disorder, which can easily and automatically determine a source image disorder.

The object of the present invention is not limited to the above-mentioned object, and other objects which are not mentioned will be clearly understood from the following description.

In order to achieve the above object, according to a preferred embodiment of the present invention, a method for determining a source image failure of a remote video system may receive image information from a remote video system (NVRS) server and change a change of each pixel in advance for an entire frame. Detecting whether a threshold is exceeded; Storing an image frame in which a sudden change occurs when a change of each pixel exceeds a predetermined threshold value for all frames of the image information; Determining whether the abruptly changed frame remains unchanged for a predetermined time and whether the abrupt change continuously occurs for a predetermined time; And if the abruptly changed frame is continuously maintained without change for a predetermined time or if the abrupt change continuously occurs for a predetermined time, determining the source image disorder and outputting the source image disorder information to the display means.

Here, the determination of whether to maintain the abrupt change compares the image information frame to determine whether the abrupt change of the frame and whether to continue the abrupt change. More preferably, the determination of whether to maintain the abrupt change is performed in the entire image generated per second of the image information frame. The comparison is made only for a predetermined frame set among the information frames.

According to a preferred embodiment of the present invention, an apparatus for determining a source image failure of a remote video system receives image information from a remote video system (NVRS) server and determines whether a change of each pixel for a whole frame exceeds a predetermined threshold. A pixel change detection unit 10 for sensing; A sudden change frame storage unit 20 for storing an image frame in which a sudden change occurs when a change of each pixel for a whole frame of image information exceeds a predetermined threshold value; A timer 50 for generating a signal at predetermined time intervals in accordance with a clock pulse; A sudden change that is provided with a time signal of the timer and determines whether the suddenly changed frame stored in the sudden change frame storage unit is continuously maintained without change for a predetermined time, and whether the sudden change continuously occurs for a predetermined time. Maintenance unit 30; Receiving the determination information of the sudden change maintaining determination unit, if the suddenly changed frame is continuously maintained without change for a predetermined time or sudden change continuously occurs for a predetermined time, it is determined as the source image failure information It includes; source image failure determination unit 40 for outputting to the display means.

As described above, the apparatus and method for determining the source video failure of the present invention can automatically determine the error of the video information stored in the remote video server, and report the error to the administrator to determine whether the video information is in error. Accordingly, there is an advantage that it is possible to secure the reliability of the video information, and to save the effort and time of the administrator.

1 is a schematic diagram of a conventional NVR system.
2 is a schematic diagram of a remote video system, in accordance with a preferred embodiment of the present invention.
3 is a flow diagram of an image delivery process and source image failure determination of a remote video system, in accordance with a preferred embodiment of the present invention.
4 is a block diagram of a source video failure determination apparatus of a remote video system according to a preferred embodiment of the present invention.
5A and 5B are examples of source imaging disorders.
6 is a flowchart of a method for determining a source video failure of a remote video system according to a preferred embodiment of the present invention for determining a source video failure as shown in FIGS. 5A and 5B.
7 is another example of a source imaging disorder.
8 is a flowchart of a method for determining a source video failure of a remote video system according to another exemplary embodiment of the present invention for determining a source video failure as shown in FIG.

Hereinafter, an apparatus and method for determining a storage space failure of a remote video system of the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic diagram of a remote video system, in accordance with a preferred embodiment of the present invention.

Referring to FIG. 2, in the remote video system of the present invention, the video input device 100 includes a conventional video input device 100 and an NVRS server 200 that stores image information collected by the video input device for each region. (100) and an NVR monitoring client server (300) for remotely monitoring the NVRS server (200).

The image input apparatus 100 may be a closed circuit television, a camera, a camcorder, or the like, and image information collected from the image input apparatus is stored in the NVRS server 200. At this time, the video input is digitized through the RTEN server (Real Time Encoder server, 150) in the case of the analog method. Although stored in the NVRS server 200, the video input is stored directly in the NVRS server 200 without going through the RTEN server 150 in the case of digital.

The video input device 100 and the NVRS server 200 move information through a communication network of a WAN or a LAN.

The NVR monitoring client server 300 is a server for monitoring the video input device 100 and the NVRS server 200 in real time from a remote location, and may be referred to as a controller. That is, the NVR monitoring client server 300 may operate and control the video input device, and may manage, supervise, process, process, and edit video information stored in the NVRS server 200. In addition, the NVR monitoring client server 300 manages / supervises an abnormal input of an image of the source image related to the present invention, that is, an image of the NVRS server 200 installed in each region.

3 is a flowchart of an image delivery process and a source image failure determination of a remote video system according to an exemplary embodiment of the present invention.

Referring to FIG. 3, as shown in FIG. 2, image information collected through an image input device located at each location may be connected to an analog video output, such as a real time encoder server (TREN) 150 or a network such as a LAN. It is connected to the output of the digital video input device that is directly connected to, and stored in the NVRS server located in each region.

NVR monitoring client server accesses frame of NVRS server of each region through H.264 code and receives image information stored in NVRS server, and if it is determined that source image failure is about this image information frame, report it to administrator do.

Here, the "source video failure" means that there is an error or failure in the video information itself provided by the NVR monitoring client server, so that the normal video screen is defective. (See FIGS. 5 and 7)

4 is a block diagram of an apparatus for determining a source video failure of a remote video system according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the apparatus for determining a source image failure of a remote video system according to the present invention includes a pixel change detection unit 10, a sudden change frame storage unit 20, a sudden change maintenance determination unit 30, and a source image failure determination. A portion 40 is included. It also includes a timer 50 that provides time information.

The pixel change detection unit 10 receives image information from a remote video system (NVRS) server and detects whether a change of each pixel exceeds a threshold (predetermined threshold value) for the entire frame.

In determining whether a change in a pixel exceeds a threshold, an “threshold” may be obtained by dividing the color of any one point in a frame at t time and a frame at t + 1 time. At this time, if the absolute difference is more than a certain amount, it can be determined that there is a sudden change. At this time, the value of "how much" is the "threshold". For example, if the threshold is set to 30, and the color of the corresponding facial at time t is white (255) and the color of the corresponding point at t + 1 time is black (0), the difference is 255. This is beyond the threshold 30, it is recognized as a sudden change. The threshold is appropriately adjusted according to the change in illuminance or the amount of change in color value between images.

The abrupt change frame storage unit 20 stores an image frame in which a sudden change occurs when a change of each pixel exceeds a threshold for all frames of the image information. Source image failures are determined by comparing the image frames stored in the abrupt change frame storage unit 20.

The timer 50 generates a signal at a predetermined time interval (predetermined time) according to a clock pulse. The timer 50 receives the time signal of the timer, and the sudden change maintenance unit 30 determines the sudden change frame storage unit. It is determined whether the abruptly changed frame stored at is continuously maintained without change for a predetermined time, and whether the abrupt change continuously occurs for a predetermined time.

That is, whether or not the sudden change maintaining unit 30 maintains a suddenly changed frame such as a still picture for a predetermined time (ex. 1 minute), or a sudden change such as a dull screen for a certain time (ex. 1 minute). It is the part that judges whether it happens continuously.

As shown in FIG. 5A and FIG. 5B as an example of an image source failure, a screen adjustment state occurs, or a screen that is turned off or cracked continues as shown in FIG. 7 shown as another example of an image source failure. . In this case, the image is changed to a non-original image that was displayed due to a screen adjustment or an internal component error. In this case, since it is not an electrical transmission failure, each input video frame must be analyzed to determine the source video failure.

5A and 5B are cases in which a sudden change occurs for the entire frame, and the sudden change occurs so that the frame is continuously maintained without changing the frame for a predetermined time (ex. 1 minute). In this case, the source image It should be determined as a failure. That is, as shown in FIGS. 5A and 5B, when the entire screen is maintained for a specific color (eg, green color) or a fixed screen having a color pattern for 1 minute or more, it corresponds to a source image failure.

At this time, the method of detecting the change is that since the sudden change of the screen (for example, green or color pattern screen) is maintained after the sudden change as before, the relay screen does not come out. Judging by. When 30 frames are input in one second, the moving image is judged to have a case in which a rapidly changed screen lasts for 1 minute = 30 frames * 60 = 1800 frames or more. However, it detects only predetermined frames (ex. 3 frames) preset in 1 second instead of 30 frames in 1 second, and if a suddenly changed frame continues for 3 * 60 = 180 frames, it may be determined as a source image failure. Can be.

On the other hand, when a dull screen appears as shown in FIG. 7, a case where a drastic change occurs continuously for a predetermined time (eg, 1 minute) for the entire frame, and in this case, it should be determined as a source image failure. In this case, the frame continuously changes over the entire frame of the screen.

In this case, when 30 frames are input in one second, a sudden change of more than 1 minute = 30 frames * 60 = 1800 frames occurs. Although it may be determined as one minute based on the system time, the video image is determined to be 1800 frames (one minute) because it is 30 frames per second. This also detects only predetermined frames (ex. Three frames) preset in one second, not all 30 frames in one second, and sudden change occurs continuously for all frames during 3 * 60 = 180 frames. It is determined to be a source video failure.

The source image failure determination unit 40 determines the two cases as source image failures and outputs source image failure information to the display means according to the information determined by the abrupt change maintenance determination unit 30. to be. That is, when the sudden change of frame is continuously received without change for a predetermined time or sudden change occurs continuously for a predetermined time, the controller determines whether it is a "source image failure". The source image failure information is output to the display means.

FIG. 6 is a flowchart of a method for determining a source video failure of a remote video system according to an exemplary embodiment of the present invention for determining a source video failure as shown in FIGS. 5A and 5B. A flowchart of a method for determining a source video failure of a remote video system, according to another preferred embodiment of the present invention, for determining a failure.

6 and 8, first, image information is received from a remote video system (NVRS) server. It is detected whether a change of each pixel exceeds a threshold for all frames of the input image information. The threshold can be set arbitrarily by the administrator. If it is maintained for a predetermined time (ex. 1 minute) without exceeding the threshold, it is recognized as a wallpaper and the background is updated.

If the change of each pixel exceeds the threshold for the entire frame of the image information, the image frame in which the abrupt change has occurred is stored.

And, with respect to the stored image frame, whether the rapidly changed frame as shown in the adjustment screen of Figs. 5a, 5b is continuously maintained without change for a predetermined time, and sudden change such as a jagged screen as shown in Figure 7 continues for a certain time To determine if it happens.

In the above two cases, that is, when a suddenly changed frame is continuously maintained without change for a certain time or sudden change continuously occurs for a certain time, it is determined as a source image failure and outputs "source image failure information" to the display means. Done.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but are intended to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the claims below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

10: pixel change detection unit 20: abrupt change frame storage unit
30: determination of whether to maintain a sudden change 40: source image failure determination unit
50: timer
100: video input device
150: RTEN server (Real Time Encoder server)
200: NVRS Server (Network Video Record Streaming server)
300: NVR monitoring client server

Claims (7)

In the source video failure determination method of a remote video system,
Receiving image information from a remote video system (NVRS) server and detecting whether a change of each pixel for a whole frame exceeds a predetermined threshold value;
Storing an image frame in which a sudden change occurs when a change of each pixel exceeds a predetermined threshold value for all frames of the image information;
Determining whether the abruptly changed frame remains unchanged for a predetermined time and whether the abrupt change continuously occurs for a predetermined time; And
If the abruptly changed frame is continuously maintained without change for a predetermined time or if the abrupt change continuously occurs for a predetermined time, determining that the source image is disturbed and outputting the source image failure information to the display means. Source image failure determination method. The method of claim 1,
The determination of whether to maintain the abrupt change comprises comparing the image information frame and determining whether the abrupt change of the frame and whether the abrupt change continues. The method of claim 2,
The method for determining a source image failure according to claim 1, wherein the abrupt change maintenance is performed only for a predetermined frame among all image information frames generated per second among the image information frames. Claims [1] A recording medium in which a program for performing a method for determining a source video failure of a remote video system is provided.
The source video failure determination method,
Receiving image information from a remote video system (NVRS) server and detecting whether a change of each pixel for a whole frame exceeds a predetermined threshold value;
Storing an image frame in which a sudden change occurs when a change of each pixel exceeds a predetermined threshold value for all frames of the image information;
Determining whether the abruptly changed frame remains unchanged for a predetermined time and whether the abrupt change continuously occurs for a predetermined time; And
If the abruptly changed frame is continuously maintained without change for a predetermined time or if the abrupt change continuously occurs for a predetermined time, determining that the source image is disturbed and outputting the source image failure information to the display means. Recording medium. In the source image failure determination device of a remote video system,
A pixel change detection unit 10 which receives image information from a remote video system (NVRS) server and detects whether a change of each pixel for a whole frame exceeds a predetermined threshold value;
A sudden change frame storage unit 20 for storing an image frame in which a sudden change occurs when a change of each pixel exceeds a predetermined threshold for all frames of the image information;
A timer 50 for generating a signal at predetermined time intervals in accordance with a clock pulse;
A sudden change that is provided with a time signal of the timer and determines whether the suddenly changed frame stored in the sudden change frame storage unit is continuously maintained without change for a predetermined time, and whether the sudden change continuously occurs for a predetermined time. Maintenance unit 30;
Receiving the determination information of the sudden change maintaining determination unit, if the suddenly changed frame is continuously maintained without change for a predetermined time or sudden change continuously occurs for a predetermined time, it is determined as the source image failure information Source image failure determination device for outputting to the display means; 6. The method of claim 5,
The apparatus for determining the source image failure according to claim 1, wherein the determination unit for maintaining the sudden change maintains the sudden change of the frame and the continued change of the sudden frame by comparing the image information frame. The method of claim 6,
The apparatus for determining an abnormality of the source image according to claim 1, wherein the sudden change maintaining unit is configured to compare only a predetermined frame among all image information frames generated per second among the image information frames.

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