KR20000040336A - Method for controlling high resolution recording of vcr using monitoring camera - Google Patents

Abstract

PURPOSE: A method for controlling the high resolution recording or a VCR for a monitoring camera is provided to increase recognition by improving the quality of image while recording in the VCR, which records the image photographed by a CCD camera. CONSTITUTION: A selection of an emergency recording mode is decided in the on states of a monitoring camera and a VCR. If the emergency recording mode is not selected, a color image photographed by a monitoring camera is recorded in the VCR by deciding the state as a normal state. If the emergency recording mode is selected, the input of a sensing signal from an invader sensor is decided. If the invader sensing is operated, the color ingredient is eliminated from the photographed image signal for recording in black and white. Then, if the invader is out of the sensing area while recording the image in black and white, the release of the emergency recording mode is decided for converting the recording of the VCR into the recording mode in color.

Description

High resolution recording control method of VSI using surveillance camera

The present invention relates to a surveillance camera VSI for recording and recording the image taken by the surveillance CCD camera, in particular, in the emergency recording mode according to the detection of the intruder deletes the color component from the color image output from the camera to the monochrome component The present invention relates to a high resolution recording control method of a surveillance camera VSI for recording a video of an intruder so that a recording resolution can be increased to obtain a clear playback screen.

Surveillance cameras using charge-coupled devices are commonly used for security purposes in banks, government offices, houses, etc. to continuously monitor the situation in a particular area.

Such a security camera allows the video output of the security camera to be transmitted to the monitor of the guard room where the guard or the monitor is located so that the guard or the monitor can understand the situation of the area being photographed by the camera.

In addition, the video signal captured by the surveillance camera can be transmitted via a cable to the video input terminal of the VCR via the surveillance monitor to record the situation of a specific region captured by the camera.

1 is a circuit configuration diagram of a conventional surveillance recording system. As referred to herein, the color image signal photographed and output by the surveillance camera 10 is connected to the video IC 11 of the VCR 20 to be applied, and the operation mode selection unit 12 and the intruder detection sensor ( The color video signal processed by the video IC 10 having the 13 is connected to the recording head 16 in the recording system 15 of the VCR 20 via the preamplifier 14.

Referring to the operation of the conventional surveillance recording system as follows.

When operating power is supplied to the surveillance camera 10 and the VCR, the color image signal captured by the camera 10 is input to the video IC 11 of the VCR 20 through a signal transmission cable.

At this time, when the operation mode of the VCR 20 is set to the normal mode in which the operation mode of the VCR 20 is always recorded in the color image output of the surveillance camera, the video IC 11 is an intruder detection sensor 13. Ignores the presence or absence of and outputs the color image signal to the preamplifier 14.

Therefore, the color image of the specific area being photographed by the camera is recorded on the video tape by the recorder 15.

On the other hand, the emergency recording mode is a monitoring recording mode for the selective recording operation, the video IC (only when the intrusion detection signal by the intruder detection sensor 13 is input by the user operating the operation mode selection unit 12) 11 transmits the video signal of the camera 10 to the preamplifier 14 side.

2 illustrates the operation flow of the conventional surveillance recording system. First, it is determined whether the selection of the emergency recording mode is input while the camera and the VCR are normally powered and operated normally.

If there is no selection input of the emergency recording mode in this step, the current normal state, that is, the color image signal output from the camera is continuously recorded as a color image on the video tape of the VCR.

However, when the selection of the emergency recording mode is input in the above step, the VCR enters the recording standby state of the video signal and maintains the recording pause state until the intruder detection signal from the intrusion detection sensor is input. Then, when the intruder detection signal is input from the intrusion detection sensor, the VCR performs a recording operation to start recording the situation of the specific area captured by the camera on the videotape.

If the intruder leaves the sensing area of the intruder sensor during recording, the VCR stops recording and waits until the next recording start signal is input.

The recording system using a conventional surveillance camera that operates as described above takes a full color video recording method. In a general VCR having a recording frequency of 3.4 MHz to 4.4 MHz, a color video resolution of about 210 images and a 4 MHz-5 MHz In a surveillance VCR having a recording frequency, the resolution of the color image is about 300 copies.

Therefore, since the degree of resolution of the surveillance VCR has a great influence on the determination of the intruder's impression, much research efforts have been made to improve the resolution.

An object of the present invention is a surveillance camera that can obtain a high resolution by improving the recording quality in a simple manner without an additional circuit configuration during emergency recording in the surveillance camera VSI recording and recording the image taken by the surveillance CCD camera It is to provide a high resolution recording control method of the dragon VSI.

1 is a circuit configuration diagram of a conventional surveillance recording system.

2 is a flowchart illustrating an operation process of a conventional surveillance recording system.

3 is a circuit configuration diagram of a recording system for achieving high resolution recording of surveillance photographed images of the present invention.

4 is a flowchart illustrating the operation of the present invention.

※ Explanation of symbols about main part of drawing ※

10: camera 11: video IC

13: intruder monitoring sensor 14: preamplifier

15: recorder 16: recording head

17: microcomputer 18: key input unit

20: VCR

The present invention for achieving the above object is a first step of determining whether the emergency recording mode is selected in the operating state of the surveillance camera and the VCR, and if the emergency recording mode is not selected in the first step is determined to monitor the normal state A second step of continuously recording the color image photographed by the camera to the VCR and determining whether a sensing signal is input from the intruder sensor when the emergency recording mode is selected; and by the surveillance camera when the intruder sensing is performed in the second step. In the third step of deleting the color component from the captured video signal and recording only in black and white, and when the intruder leaves the sensing area during the black and white video recording by the third step, the VCR switches to the color video recording mode and And a fourth step of waiting for input of a sensing signal according to an intruder occurrence.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

FIG. 3 is a circuit diagram of a recording system for achieving high resolution recording of surveillance video. The color video signal captured and output by the surveillance camera 10 is applied to the video IC 11 of the VCR 20. The video IC 11 outputs the color image at the first output terminal out1 and the black and white image at the second output terminal out2 to the preamplifier 14 according to the control output of the microcomputer 17. .

The color or black and white video signal output from the preamplifier 14 is connected and recorded on the video tape by the recording head 16 of the recorder 15.

The microcomputer 17 receives inputs from the key input unit 18 and the intruder detecting sensor 13 and outputs a high level H when the monochrome image is selected to the video IC 11 and a low when the color image is selected. It is configured to output the level (L).

The operation process of the monitoring VCR configured as described above is as follows.

When the normal surveillance recording mode is selected by operating the key input unit 18 on the VCR 20 side to which the surveillance camera is connected, the microcomputer 17 performs a video IC (regardless of whether an intruder is detected by the intruder detection sensor 13). A low level (L) signal for selecting a color image signal is output to the video IC 11 as a control signal so that the color image signal processed in step 11) is recorded on the video tape.

Accordingly, since the color image signal of the specific region captured by the surveillance camera 10 is output as a color image to the preamplifier 14 through the video IC 11, the surveillance image signal captured by the camera is recorded on the recording head 16. By this, the video tape of the recorder 15 is recorded.

In this case, since full color is selected and recorded, the resolution is recorded as about 300 copies.

When the user selects the emergency recording mode by operating the key input unit from the normal state condition, the microcomputer 17 receives the intrusion detection input by the intruder detection sensor 13 to enable high resolution and high quality video recording at this time. Outputs a high-level (H) for black-and-white video signal selection and selects the color video signal recording mode if no intruder is detected even if the emergency recording mode is not selected or the emergency recording mode is selected. Outputs a low level (L).

Therefore, when an intruder is detected, the black and white video signal of which color is deleted is recorded on the video tape of the recorder 15 through the preamplifier 14 at the second output terminal out2 of the video IC 11.

As the color component is deleted from the video signal, the recording resolution of the black-and-white video signal is recorded as 350 units by the pure luminance component. Will be recorded.

4 is a flowchart illustrating a process of recording and controlling a recording signal of a surveillance camera according to the present invention in high resolution.

As referred to herein, in the first step, it is determined whether the emergency recording mode is selected in the operation state of the surveillance camera and the VCR during the recording control using the surveillance camera and VSI.

In the second step, if the emergency recording mode is not selected as the result of performing the first step, it is judged to be normal and continuously records and records the color image captured by the surveillance camera on the video tape in the VCR, and the emergency recording mode is selected. If so, it is determined whether an intruder detection signal is input from the intruder sensor.

In the third step, when the intruder detection signal is input in the second step, the color component is deleted from the video signal captured by the surveillance camera, and only the black and white image by the luminance value is recorded on the videotape.

In the fourth step, when the intruder is detected by the sensor of the third step, the video output of the surveillance camera is changed to black and white, and if the intruder leaves the sensing area while recording on the video tape, the VCR determines that the emergency recording is released and the recording mode is set. Switch from black and white to color video recording mode.

As described above, in the present invention, when monitoring and recording a specific area by using a surveillance camera and a VCR, the intensity of the luminance signal is reduced by deleting color components from the color image signals photographed by the camera in case of an emergency by intruder detection. By recording on a video tape as a black and white image by the camera, a high-definition picture quality with about 50 resolutions higher than that of the color recording method is obtained.

In particular, in order to secure a slight resolution increase, an expensive circuit device and a complicated circuit configuration are required. In the present invention, a high resolution image quality can be obtained at low cost without incurring a complicated circuit configuration.

Claims (1)

A recording control method using a surveillance camera and a VSI, comprising: a first step of determining whether an emergency recording mode is selected in an operation state of a surveillance camera and a VCR; and a normal state if the emergency recording mode is not selected in the first step. In the second step of judging whether the sensing signal is input from the intruder sensor when the emergency recording mode is selected and the color image photographed by the surveillance camera is continuously recorded on the VCR. The third step of removing color components from the video signal captured by the surveillance camera and recording only in black and white, and if the intruder gets over the surveillance area during the black and white video recording by the third step, the VCR stops recording the black and white video. And a fourth step of switching to the video recording mode.