KR100299534B1 - Method Of Control Memory And Method Of Outputting Disorder Signal Using The Same Of Video Observation Apparatus - Google Patents

Abstract

The present invention relates to a memory control method of a video surveillance apparatus capable of detecting and outputting only a change occurring on a screen and an abnormal signal output method using the same.

A memory control method of an image sensing apparatus according to the present invention includes a memory for storing image data photographed by a surveillance camera, a microcontroller for controlling the memory, and a monitor for displaying the image data, the image being displayed on the monitor. A method of outputting an abnormal signal when the video data is different from previous video data corresponding to the monitoring focus area by comparing the previous video data and the current video data corresponding to the monitoring focus area with the control of the microcontroller. Selecting an address of the memory by a signal supplied from the address generator via the address director and storing the image data in the memory through the data director; and storing the image data in the memory under the control of the microcontroller. Selecting an address of the memory through the selector, and a step for reading the image data stored in the memory through the same director data and the image data is saved.

Description

Method of Control of Video Surveillance Device and Output of Abnormal Signal Using It {Method Of Control Memory And Method Of Outputting Disorder Signal Using The Same Of Video Observation Apparatus}

The present invention relates to a method of driving an image surveillance apparatus, and more particularly, to a memory control method of a Youngsan surveillance apparatus capable of detecting and outputting a case where a change occurs on a screen and an abnormal signal output method using the same.

In general, the surveillance system for monitoring the occurrence of the abnormal phenomenon may be an example of a surveillance system using infrared rays, an ultrasonic monitoring system and a video surveillance system using a camera and a monitor.

Referring to Figure 1, a conventional monitoring system using infrared rays is schematically shown.

The surveillance system using the infrared rays of FIG. 1 focuses the weak infrared rays emitted from the human body (or animal) to the infrared concentrator 2 and detects the focused ultraviolet rays by the infrared detector 4 at the focal point. It consists of a structure that outputs the result. By the way, this infrared monitoring system has a problem that the detection range is narrow and it is impossible to check unless you go to the installation site what the object of access is. In addition, there is a fear of malfunction by other signal sources having heat.

Referring to Figure 2, a conventional monitoring system using ultrasound is shown schematically.

The monitoring system using the ultrasonic wave of FIG. 2 emits ultrasonic waves from the ultrasonic generator 6 and detects the reflected wave generated by the object through the ultrasonic receiving unit 8 when an arbitrary object enters the monitoring target region. It consists of a structure that outputs. However, there is a problem in that the monitoring system using ultrasonic waves is also narrow in the range of detection and cannot be confirmed unless the user visits the installation site of the object of the approach. In addition, there is a fear of malfunction due to other sources of noise such as machine vibrations, automobile sounds, and the like.

Referring to FIG. 3, a video surveillance system using a conventional camera and a monitor is schematically illustrated.

3 is a structure for capturing a subject by the camera 10 and displaying a screen captured by the monitor 12. The monitor determines whether there is an abnormality through the screen displayed on the monitor 12. Take the necessary action. However, such a video surveillance system is inconvenient that the monitor should always look at the monitor. In addition, the watcher should always look at the monitor, making it easy to get tired and miss the crucial moment. In addition, the number of monitors needs to be increased in proportion to the number of monitoring monitors, and when an abnormal phenomenon occurs, a person must deal with necessary measures one by one.

Accordingly, it is an object of the present invention to provide a memory control method of an image surveillance apparatus capable of detecting and outputting only a case where a change occurs in a screen after setting an area to be monitored by a monitor on a monitor and an abnormal signal output method using the same. .

1 is a schematic view showing a conventional surveillance system using infrared rays.

2 is a view schematically showing a conventional monitoring system using ultrasonic waves.

Figure 3 is a schematic view showing a three-dimensional surveillance system using a conventional camera and monitor.

4 is a view showing a video surveillance system according to an embodiment of the present invention.

5 is a block diagram showing the configuration of a video surveillance apparatus according to an embodiment of the present invention.

6 is a diagram showing a surveillance area set on a screen of a monitor;

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

2: infrared focuser 4: infrared detector

6: ultrasonic generator 8: ultrasonic receiver

10, 14 camera 12, 18 monitor

20: setting input section 22: microcontroller

24: On Screen Signal Generator 26: Synthesis Unit

30: synchronous detector 32: clock generator

34: address generator 36: address director

38: analog / digital converter 40: data director

42: memory 44: counter

In order to achieve the above object, the memory control method of the video surveillance apparatus according to the present invention comprises a memory for storing the image data photographed by the surveillance camera, a microcontroller for controlling the memory and a monitor for displaying the image data And set the monitoring focus area to focus on the arbitrary position on the image displayed on the monitor, and compare the previous video data and the current video data corresponding to the monitoring focus area and output the abnormal signal if the video data are different. And selecting an address of the memory by a signal supplied from the address generator under the control of the microcontroller, and storing the image data in the memory through the data director, and controlling the image data under the control of the microcontroller. Selecting an address of the memory through the same address director as when storing the data, and reading out the image data stored in the memory through the same data director as when storing the image data.

The abnormal signal output method of the image sensing apparatus according to the present invention includes a memory for storing image data photographed by a surveillance camera, a microcontroller for controlling the memory, and a monitor for displaying the image data and displayed on the monitor. A method for outputting an abnormal signal when the image data is different by setting the monitoring focus region to monitor an arbitrary position in the image intensively and comparing the previous video data corresponding to the monitoring focus region with the current image data. Reads the image data input to the microcontroller and causes the microcontroller to operate and stores the result in the microcontroller, stores the image data currently input into the memory, and then reads the image data stored in the memory and causes the microcontroller to read the image data. Re-open And a step that, to allow the micro-controller compares the result with the result of the current image data of the previous image data comprises the step of determining the error is checked by the car.

Other objects and advantages of the present invention in addition to the above object will become apparent from the description of the preferred embodiment of the present invention with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 4 to 6.

FIG. 4 schematically illustrates an image monitor according to an exemplary embodiment of the present invention. The image monitor of FIG. 4 monitors a camera 14 for photographing a subject and an image signal input from the camera 14. 18) and a main body 16 for determining whether the screen is changed or not.

In the video surveillance apparatus of FIG. 4, the main body 16 sets an area to be monitored by a monitor on the monitor 18. The camera 14 captures a subject and generates an image signal. The main body 16 displays the video signal input from the camera 14 on the screen through the monitor 18 and determines whether the preset surveillance area is changed. Here, when there is a change in the screen, the main body 16 may generate an abnormal signal to drive the recorder, to sound an alarm, or to contact a necessary place.

Referring to FIG. 5, the internal structure of the main body 16 of the video surveillance apparatus shown in FIG. 4 is shown for each block.

The main body 16 of the video surveillance apparatus shown in FIG. 5 includes a microcontroller 22 having a setting input section 20, an on-screen signal generator 24 connected to the microcontroller 22, a synthesizing section 26 and a monitor. And (28).

First, while setting the area to be monitored by the supervisor, the setting input unit 20 is used to set the monitoring area and the range of the monitoring area and the allowable change of the monitoring area while watching the screen displayed on the monitor 28. do. The microcontroller 22 controls the on-screen signal generator 24 according to the range of the surveillance region input from the setting input section 20 and stores the change tolerance in an internal memory (ie, RAM). The on-screen signal generator 24 generates an on-screen signal for displaying a setting range on the screen of the monitor 28 under the control of the microcontroller 22. The synthesizing unit 26 synthesizes and outputs the on-screen signal input from the on-screen signal generator 24 and the composite video signal input from the camera through the input line 21. The monitor 28 displays the synthesized signal input from the combiner 26 on the screen. At this time, in the screen displayed on the monitor 28, the surveillance region set by the monitor is displayed in a block form.

The main body 16 of the video surveillance apparatus according to the present invention includes a synchronous detector 30 connected to the input line 21, a clock generator 32 and an address generator (commonly connected to the output terminals of the synchronous detector 30). 34, the address director 36 connected between the address generator 34 and the microcontroller 22, the analog / digital converter 38 connected to the input line 21 and the clock generator 32, and the analog. A data director 40 connected between the / digital converter 38 and the microcontroller 22, a memory 38 commonly connected to the address director 36 and the data director 40, a clock generator 32, A counter 44 connected between the microcontrollers 22 is provided. The synchronization detector 30 detects and outputs vertical and horizontal synchronization signals H and V from the composite image signal input from the camera through the input line 21. The clock generator 32 generates a pixel clock signal in accordance with the synchronization signal input from the synchronization detector 30. The frequency of the pixel clock signal generated by the clock generator 32 determines the number of sampling for converting the analog video signal included in one scan line into a digital signal. The analog / digital converter 38 converts the composite video signal input through the input line 21 into a digital signal by the pixel clock signal input from the clock generator 32. The address generator 34 generates an address in accordance with the horizontal and vertical synchronization signals H and V input from the synchronization detector 30. Here, the address generator 34 is composed of an eight step counter. The address director 36 and the data director 40 are directional elements that selectively convert the advancing paths of the address and data under the control of the microcontroller 22. First, in the case of storing the input image signal in the memory 42, the microcontroller 22 controls the address director 36 so that the address signal generated by the address generator 34 is transmitted to the memory 42. In addition, the microcontroller 22 controls the data director 40 so that the data signal output from the analog / digital converter 38 is transmitted to the memory 42. The memory 42 stores image data input through the data director 40 at a position designated as an address input through the address director 36. When the image data of the preset surveillance area is stored in the memory 42, the microcontroller 22 may have each of the address director 36 and the data director 40 to read the data stored in the memory 42. It is controlled to be connected to the memory 42 and the microcontroller 22. The microcontroller 22 generates an address and outputs the address to the memory 42 through the address director 36. Subsequently, the microcontroller 42 reads the data stored at the designated address through the data director 40. By doing so, the number of address lines and data lines required is halved. The microcontroller 22 sequentially calculates the image data output from the memory 42 while sequentially increasing the address, and calculates the data up to the last address of the memory 42. Remember.

Next, the above-described operation is repeated for the next image input through the input line 21 and stored in the memory 42, and the microcontroller 22 calculates all the image data stored in the memory 42. Subsequently, the microcontroller 22 compares the calculated value for the previous image and the calculated value for the next image, and determines that an abnormal phenomenon occurs when the resultant value is out of the upper (upper limit) or lower (lower limit) value than the previously stored change tolerance value. The abnormal signal is output through the output line 23.

In this way, the abnormal signal outputted by the change in the screen is used as a driving source for driving the device additionally connected to the above-described video surveillance apparatus. For example, when the video recording apparatus is connected to the video surveillance apparatus, the video recording apparatus is driven by the abnormal signal to store the changed image on the storage medium. In addition, when an alarm device is connected to the video monitoring device, an alarm sound is generated by the abnormal signal, so that the monitor can recognize that an abnormal phenomenon has occurred. In addition, when a telephone line is connected to the video surveillance apparatus, the abnormal signal automatically connects the telephone to notify the monitor of an error occurrence message. Accordingly, the monitor can recognize the screen as soon as a change occurs and take necessary measures even if the monitor is not always watching the monitor.

Referring to the configuration of the NTSC video signal in order to determine the size of the memory 42 for recording the video signal in FIG. 5, the NTSC video signal is composed of two fields. In this case, the odd-numbered field is composed of 263 scan lines, the even field is composed of 262 scan lines, and one screen is composed of 525 scan lines. Here, each field is divided by the vertical synchronization signal. In the odd-numbered field, no video signal is included in the first through nineteenth scan lines, and only the 20th through 262th scan lines contain valid video signals. In other words, only 242 of 263 scan lines in the odd-numbered field contain valid video signals. The use of the image memory 42 can be maximized by using the characteristics of the NTSC image signal. In order to use as little memory as possible, the image surveillance apparatus according to the present invention can shorten the detection period of change by using a method of detecting image data using only the odd field and operating on the even field. In order to convert the analog video signal corresponding to one scanning line into a digital video signal in order to convert the digital video signal into pixels, the more the sampling frequency is, the higher the accuracy is but the larger the memory capacity is, the better the adjustment is necessary. For example, an analog video signal corresponding to one scan line is divided into 256 and sampled. Subsequently, the analog-to-digital converter 38 digitally converts the sampled pixel into a size of 8 bits. Accordingly, when the size of the required memory is calculated, a memory of 256K (256 (number of pixels of one scanning line)) x 242 (scanner of one field) x 8 (conversion bit) x 62 KByte is sufficient.

6, a method for setting a surveillance region in a video surveillance apparatus according to the present invention will be described in detail as follows.

On the screen shown in FIG. 6, each coordinate (i.e. pixel) has an arbitrary vertical and horizontal value as an initial value, and the distance to each coordinate calculates the distance away from the microcontroller 22 in the vertical and horizontal directions and the result. By outputting to the on-screen signal generator, a rectangular surveillance area including coordinates A and B is always displayed on the screen. In order to set the surveillance region, the setting input unit 20 includes a direction key for moving the coordinates up and down and up and down to set the surveillance region and an enter key for storing the set coordinates.

First, when the vertical direction key of the setting input unit 20 is set to set the vertical position y of the coordinate A included in the monitoring area, the address generator 34 outputs the horizontal synchronization signal H output from the synchronization detector 30. By counting at, the microcontroller 22 detects the vertical position of the moved coordinate A. FIG. Subsequently, the microcontroller 22 calculates the horizontal and vertical position difference between the detected coordinates A and B and outputs the result to the on-screen signal generator 24, thereby setting the A on the screen of the monitor 28 by the monitor. The position of the coordinate is displayed. When the monitor presses the enter key of the setting input section 20, the vertical position of the set A coordinate is stored in the internal memory of the microcontroller 22. Then, when the left and right arrow keys of the setting input unit 20 to set the horizontal position (x) of the coordinate A, the clock signal output from the clock generator 32 is counted in the counter 44, and the microcontroller 22 moves. The horizontal position of the coordinate A is detected. The microcontroller 22 then calculates the horizontal and vertical position differences between the detected coordinates A and B and outputs the results to the on-screen signal generator 24 to set A by the monitor on the screen of the monitor 28. The position of the coordinate is displayed. Then, when the monitor presses the enter key of the setting input unit 20, the horizontal position of the set A coordinate is stored in the internal memory of the microcontroller 22. When the horizontal and vertical positions (x, y) of the coordinate A are determined through this process, the microcontroller 22 accepts the position of the coordinate B.

In order to set the vertical position y of the coordinate B included in the monitoring area, when the up / down direction key of the setting input unit 20 is pressed, the horizontal synchronization signal H output from the synchronous detector 30 is counted by the address generator 34. By outputting, the microcontroller 22 detects the vertical position of the moved coordinate B. FIG. The microcontroller 22 then calculates the horizontal and vertical position differences between the detected coordinates B and A and outputs the result to the on-screen signal generator 24, thereby setting the B on the screen of the monitor 28 by the monitor. The position of the coordinate is displayed. When the monitor presses the enter key of the setting input unit 20, the vertical position of the set B coordinate is stored in the internal memory of the microcontroller 22. Then, when the left and right arrow keys of the setting input unit 20 to set the horizontal position (x) of the coordinate B, the microcontroller 22 is moved by counting and outputting the clock signal output from the clock generator 32 at the counter. The horizontal position of coordinate B is detected. Subsequently, the microcontroller 22 calculates the horizontal and vertical position difference between the detected coordinates B and A and outputs the result to the on-screen signal generator 24, thereby setting the B on the screen of the monitor 28 by the monitor. The position of the coordinate is displayed. Through this process, coordinates A and B are determined, and a monitoring window is set on the screen.

The field of application of the video surveillance apparatus according to the embodiment of the present invention is wide. For example, when monitoring the operation state of the machine on the monitor 28, the image surveillance apparatus of the present invention changes when the gear is changed to an abnormal operation state such as when one gear is broken while three gears are engaged with each other. Generate an abnormal signal so that you can take the necessary action.

As described above, according to the memory control method of the video surveillance apparatus and the abnormal signal output method using the same according to the present invention, since all the parts captured by the camera can be detected, the detection range is wide and the monitor does not have to go to the installation place. The phase can be confirmed. In addition, according to the video surveillance apparatus according to the present invention, since the monitor does not always have to watch the monitor can reduce the fatigue of the monitor and can increase the number of monitors that can be monitored by one monitor is efficient. In addition, according to the video surveillance apparatus according to the present invention it is possible to monitor the abnormal phenomenon in a dangerous area where people can not go, and to immediately check the moment when the abnormal phenomenon occurs and take necessary measures at the same time.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (3)

And a memory for storing the image data captured by the surveillance camera, a microcontroller for controlling the memory, and a monitor for displaying the image data, so as to centrally monitor any position on the image displayed on the monitor. A method of setting a monitoring focus region and outputting an abnormal signal when the image data is different from previous image data corresponding to the monitoring focus region and current image data, wherein the address is controlled through an address director under the control of the microcontroller. Selecting an address of the memory by a signal supplied from a generator and storing the image data in the memory through a data director; and controlling the image data under the control of the microcontroller. Through the director's choice of address of the memory and the memory control method of the video surveillance system comprising the steps of reading the image data stored in the memory through the same data director and the image data is saved. And a memory for storing the image data captured by the surveillance camera, a microcontroller for controlling the memory, and a monitor for displaying the image data, so as to centrally monitor any position on the image displayed on the monitor. A method of setting a monitoring focus region and outputting an abnormal signal when the video data are different from previous video data corresponding to the monitoring focus region and current video data, the previously input video data stored in the memory is read. Causing the microcontroller to operate and storing the result in the microcontroller; storing image data currently input to the memory, and then reading the associative data stored in the memory and causing the microcontroller to read back. And causing the microcontroller to compare the result value of the previous image data with the result value of the current image data and determine whether there is an abnormality based on the difference. Output method. The method of claim 2, wherein the determining of abnormality comprises: setting a change tolerance value having a predetermined upper limit value and a lower limit value, and determining a difference between a result value of the previous image data and a result value of the current image data. And outputting an abnormal signal when the difference value of the image data is out of the change tolerance value in comparison with the control unit.