KR20000026691A - Intelligent ccd camera for monitoring and recording and controlling method thereof - Google Patents

Abstract

PURPOSE: An intelligent CCD(charge coupled device) camera is to capture only a required moment and compact an image of the moment and transmits the image to a central controlling computer, thereby facilitating a maintenance thereof. CONSTITUTION: An intelligent CCD camera for monitoring and recording comprises a plurality of image capture units which are disposed at a place to obtain an image of a correspondent monitoring area at a constant time interval and compares the images having the constant time interval and sorts out a difference between the images, and a central controlling part which is connected with the image obtaining parts to remote-control the image obtaining parts and receives/stores images only selected by the image obtaining parts. The image obtaining part comprises a CCD camera(211) for monitoring an area at a constant time interval, a signal processor(204) for controlling an image selecting process, an image processing unit for converting an analog image from the CCD camera into a digital image and transmitting the digital image to the signal processor.

Description

Intelligent CD Camera System for Surveillance Recording and its Control Method

The present invention relates to an intelligent CCD camera system for surveillance recording and a control method thereof. In particular, the present image is sent to the central control computer only when it is different from each other by comparing the previous image with the reference image, which is the previous image. Intelligent CCD camera system for surveillance recording and its control method, characterized in that it becomes a reference image and compares it with the next input image to increase the value of the stored data as data and to efficiently use the recording storage. It is about.

When a recent request is made to record the intrusion contents in places where people or vehicles are not easily accessed, such as underground parking lots, or to secure data on illegal / unauthorized intrusions in times or spaces where there is little human activity. Security devices such as unmanned surveillance / alarm systems are being used. Among them, the preservation of the on-site situation using the unmanned surveillance camera is of great significance for securing evidence after an accident. Cameras are used a lot.

The installation method of such a camera for surveillance recording can be summarized in two ways as follows.

One method is to install a simple CCD (Charge Coupled Device) camera with no intelligence at the place where the problem is expected, and at the central control center, the analog signal output from the camera (e.g. NTSC (National Television System Committee) method) ) Is continuously stored in a recording medium such as a VCR (Video Cassette Recorder), and another method is to install a digital camera in a more advanced manner to obtain a field input image with the camera installed at regular intervals. For example, you can write to a mass storage and reference it when a problem occurs.

However, this conventional method has many problems.

First, the first case requires one VCR per CCD camera output at the central control center, the VCR tape needs to be replaced at regular intervals, and the administrator must always stay there. Although it is solved, it is necessary to acquire the installation site image at regular time intervals, and it has the disadvantage of producing a meaningless image in order to secure a record. Since the image is acquired at a fixed time interval as described above, the time interval It is important to set the proper time.If you shorten the time interval for acquiring the installation site image to increase the effectiveness of the record keeping, the effect of the record keeping is high, but the large amount of storage space is required, which is a waste in terms of cost. There are disadvantages, and longer time intervals can cause problems. There are missing records that may be a clue moment is likely to disadvantage when.

Therefore, in the present invention, in order to solve the above-mentioned problems, the intelligent signal processing processor is introduced into the conventional CCD camera, and only when the input image of the camera changes due to the entrance or exit of the vehicle at the site where the camera is installed. Intelligent CCD camera system for surveillance recording and its control method, characterized in that the image is acquired and stored in the central control computer, and the acquisition interval of the image can be arbitrarily adjusted remotely to increase the value of the stored information as a record. To provide.

In order to achieve the above object, a CCD camera system provided by the present invention includes a plurality of CCD cameras for acquiring an image of a corresponding surveillance area, comparing the previously acquired image, and selecting only the changed image, and the CCD camera and communication network. And a central control computer remotely controlling the operation of the image acquisition means and receiving and storing only the images selected by the image acquisition means, and controlled by the central control computer. When the CCD camera operates, the CCD camera acquires the image only when there is a change in the input image and stores the image in the central control computer, thereby discarding meaningless data among the images input at regular intervals through the CCD camera, and storing the stored data. Increase the value of data, It characterized in that it can be used as efficiently.

1 is a block diagram of an intelligent CCD camera system for surveillance recording of the present invention;

2 is a block diagram of an intelligent CCD camera of the present invention;

3 is a flow chart of a control method of the intelligent CCD camera system for surveillance recording of the present invention.

<Explanation of symbols for main parts of drawing>

100: central control computer 200: intelligent CCD camera

201: communication transmitter 202: communication receiver

203: control command input unit 204: signal processing processor

205: camera address 206: reference image storage

207: Current Image Repository 208: Image Acquisition Controller

209: Image Compressor 210: Analog-to-Digital Converter

211: CCD camera

Hereinafter, the intelligent CCD camera system and its control method provided by the present invention will be described in more detail with reference to the accompanying drawings.

1 is a block diagram of an intelligent CCD camera system for surveillance recording of the present invention, FIG. 2 is a block diagram of an intelligent CCD camera of the present invention, and FIG. 3 is a control method of the intelligent CCD camera system for surveillance recording of the present invention. Is a flow chart for.

Referring to FIG. 1, an intelligent CCD camera system provided by the present invention is installed in an arbitrary place requiring surveillance, and acquires an image of a corresponding surveillance region at a predetermined time interval, compares it with a previously acquired image, and then changes the image. A plurality of intelligent CCD cameras 200 for selecting only and connected to the plurality of intelligent CCD cameras 200 through a communication network to remotely control the operation of the intelligent CCD camera 200 and to be selected by the intelligent CCD camera 200. It is composed of a central control computer 100 for receiving and storing only the captured image.

At this time, the central control computer 100, the structure of a general personal computer, the central control unit (CPU) 130 for controlling the operation of the entire system, the memory 110, the mass storage device 120 and A storage controller 140 for controlling information stored in the mass storage device 120 under control of the central control unit 130, and a communication transmitter 150 for transmitting the information to the intelligent CCD camera 200. ) And a communication receiver 160 for receiving information from the intelligent CCD camera 200.

Looking at the function of each component constituting the central control computer 100, first, the central control unit (CPU) 130 manages all hardware resources, coordinates and manages data and control flow therebetween, the memory 110 is a device for storing a variety of data to temporarily store the image data transmitted from the intelligent CCD camera 200, the data is transferred to the mass storage device 120 by a central control unit (CPU) 130 Sending or receiving a function, the mass storage device 120 stores the data in the memory 110 or sends data to the memory 110 according to the instructions of the storage controller 140.

At this time, the storage controller 140 receives instructions from the central control unit (CPU) 130, and controls data storage and data reading of the mass storage device 120, the communication transmitter 150 is a central control unit ( The camera control command and parameters instructed by the CPU 130 are sent to the intelligent CCD camera 200, and the communication receiver 160 displays the state of the camera and the acquired image data, which is digital video data transmitted from the intelligent CCD camera 200. Receives and transmits to the central control unit (CPU) (130).

On the other hand, Figure 2 is a detailed configuration of the intelligent CCD camera 200, the intelligent CCD camera 200 selects the image obtained through the camera input, if necessary, sends the image to the central control computer, if necessary, When the control command and parameters are remotely received from the central control computer, the operation state of the camera is changed according to the value, and the function is notified. Referring to FIG. 2, the intelligent CCD camera The central control computer as a central processing unit that controls all operations of the CCD camera 211 and the CCD camera 211 which acquires an image of the surveillance area at an arbitrary time interval and is output as an analog signal. Receives control commands and parameters from the camera to set the operating environment of the CCD camera 211 and the image obtained by the CCD camera 211. A signal processing processor 204 for performing a control for performing screen selection, an analog / digital converter 210 for converting and outputting an analog image obtained by the CCD camera 211 to digital, and the digital The image compressor 209 compresses a signal and transmits the signal to the signal processing processor 204, and controls the operations of the analog / digital converter 210 and the image compressor 209 under the instruction of the signal processing processor 204. An image acquisition controller 208, a communication transmitter 201 for transmitting digital video data and a state of the camera to the central control computer 100, and receiving camera control commands and parameters from the central control computer 100. A camera address storage 205 for storing an address of the CCD camera 211 registered in a communication network connected to the communication control unit 202, the central control means; A storage 206 for storing a reference image, a storage 207 for storing a currently acquired image for comparison with the reference image, and a control signal for a user to directly control the CCD camera 211 in the field Control command input unit 203 for inputting a.

In this case, the control command input unit 203 may set the image acquisition time interval, the focal length, and the surveillance region of the CCD camera 211, and may set whether to operate the CCD camera.

In addition, the camera address 205 is an identifier for the central control computer 100 to distinguish each camera when a plurality of cameras are connected to a communication network. The camera address 205 is stored in a nonvolatile memory. ) Stores information obtained earlier in time than the current image as a reference image to be used as a reference image that is reference information for comparison with a current image obtained later. The current image store 207 stores image information recently acquired in time, and compares it with a reference image previously acquired in time.

On the other hand, the image acquisition controller 208 is to be synchronized to the repeated data movement in the image comparison process of the reference image and the current image.

The processing flow for the control of the intelligent CCD camera system of the present invention having such a configuration is shown in FIG. 3. Referring to FIGS. 1 to 3, the control method of the present invention is a signal processing processor of a camera installed at an arbitrary place. 204) (shown in FIG. 2) receives the control command and parameters of the CCD camera from the central control computer (s301), checks whether the received command and parameters match their camera address and sends the received message to itself. If it is determined that the command is a destination, and if it is determined that the command is received by itself, the environment and parameters of the camera are determined according to the received control command / parameter. After setting (s303), the reference image storage is reset to set an initial reference image (s304), and thus preparation for operation is completed.

In this way, when preparation for operation is completed, it waits for the operation start command of a camera. If there is no start command, it continuously waits for an operation start command, and when the operation start command arrives (s305), it enters the input image acquisition process of the camera.

In the process of acquiring an input image of the camera, first, an input image of an analog state obtained through the camera is converted to digital (s306), and the image is compressed (s307) in order to minimize the data size of the converted digital data. The stored image is stored in the current image storage (s308).

Subsequently, the controller periodically checks whether there is no control command (s309). If there is a control command, it is determined whether the control command is a command to end (s314). If the command is an end command, the operation of the camera is stopped. Since it is a command for camera environment and parameter setting, the process goes to the CCD camera environment and parameter setting step s303.

On the other hand, if it is determined whether there is a control command (S309), if there is no control command (S310) and compares the reference image and the current image, if the two images are the same A / D conversion step of the input analog again (s306) If the reference image and the current image are not the same, the current image is sent to the central control computer through the communication network (s312), the current image is stored in the reference image storage (s313), and the A / D conversion step of the input analog is performed. Go to (s306).

The present invention as described above is a method for avoiding unconditional input of an image at a predetermined time interval, and compares a reference image with a current image just input, which means that no intrusion is made. This is evidence that this has occurred, and by storing only the current image when the difference occurs, it can fully serve as surveillance record information.

As described above, the present invention captures only the moment when record preservation is required and compresses and sends the image to the central control computer, so that a large storage device is not required and an administrator does not have to reside. And once installed, most operations can be maintained remotely, reducing costs in many ways.

Therefore, if the present invention is applied to an existing unmanned surveillance recording system, its effectiveness will be proved in technical aspects and economics, and the demand and ripple effect of the present invention are expected to be great.

Claims (4)

A plurality of image acquisition means installed at any place requiring surveillance and acquiring an image of the surveillance region at a predetermined time interval, comparing the previously acquired image, and selecting only the changed image; Intelligent CCD camera for surveillance recording, comprising a central control means connected to the image acquisition means and a communication network to remotely control the operation of the image acquisition means and to receive and store / manage only the images selected by the image acquisition means. system. The method of claim 1, wherein the image acquisition means A CCD camera which acquires an image for the surveillance area at a predetermined time interval, A signal processing processor which receives a control command and a parameter from the central control means to set an operating environment of the CCD camera and performs control for performing selection on an image acquired by the CCD camera; An image processing unit for converting an analog image acquired by the CCD camera into digital, and then compressing and transmitting the compressed image to the signal processing processor; An image acquisition controller configured to control an operation of the image processor in response to an instruction of the signal processor; Communication means for transmitting and receiving data by the central control means and a communication network; And storage means for storing an address of the CCD camera registered in a communication network connected to the central control means and an image acquired by the CCD camera. 3. The signal processing processor of claim 2, wherein the signal processing processor is When a control signal for starting operation is received by the central control means, Set an unknown image initially acquired by the CCD camera with respect to the surveillance area as an initial reference image, Comparing images obtained continuously by a predetermined time interval with the reference image, selecting only images having a difference from the reference image, and transmitting the selected images to the central control means; And resetting the transmitted image to a reference image and then repeating a comparison process between the reference image and the currently acquired image. Surveillance consisting of a plurality of CCD cameras installed at any place for surveillance recording, and a central control computer connected to the CCD camera and a communication network to control the operation of the CCD camera and to store / manage images acquired through the CCD camera. In a CCD camera system for recording, A first process of acquiring an initial image of a corresponding area and setting it as a reference image when the CCD camera is operated by the control of the central control computer; A second process of the CCD camera acquiring an image of the surveillance area at a predetermined time interval and comparing the image with the reference image set in the first process; A third process of selecting and compressing only an image having a difference from the reference image according to the comparison result of the second process, and then transmitting the compressed signal to the central control computer; And a fourth process of repeating the second process after the second process by resetting the transmitted image to a reference image.