KR20000040335A - Method for controlling switching recording of vcr using monitoring camera - Google Patents

Abstract

PURPOSE: A control method of switching recording in a VCR for a monitoring camera is provided to seize an invader using a black and white image and a color image by recording with the black and white image and the color image at an emergent recording in the VCR having the camera for monitoring. CONSTITUTION: An emergent recording mode of a VCR for monitoring is decided. A color is recorded in a normal recording mode and a photographed image is recorded in a black and white when a sensing signal of invasion is generated by deciding if there is an invader in an abnormal. When a timing value is a first set time during recording with the black and white, the photographed image is recorded with color after resetting a timer. When the timing value is a second set time during recording with color, the timer is reset. A look and a dressing of the invader are cleanly distinguished by alternatively recording an emergent state with the block and white image of high resolution and with the color image having a color sense in a videotape of the VCR by using a camera for monitoring.

Description

Switching recording control method of VSI using surveillance camera

The present invention relates to a surveillance camera VCR for recording and recording the image taken by the surveillance camera, in particular, in the emergency recording mode according to the detection of the intruder by switching the video recording mode and color image recording mode at a certain time interval video The present invention relates to a switching recording control method for a surveillance camera VSI that records and records on a tape to accurately and precisely grasp the intention of an intruder using high-quality black-and-white images and colors of color images.

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.

It is an object of the present invention to switch between black and white video recording mode and color video recording mode at regular time intervals in an emergency recording in a surveillance camera VCR for recording and recording an image taken by a surveillance camera. It is to provide a switching recording control method for a surveillance camera VSI that can accurately and precisely grasp the intention of the intruder using the color of the color image.

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

19: timer 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 on 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 color images captured by the camera on a video tape of the VCR and determining whether a sensing signal is input from the intruder detecting sensor when the emergency recording mode is selected; and an intruder sensing signal is generated in the second step. In the third step of deleting the color component from the video signal captured by the surveillance camera and recording only in black and white at the same time as the timing count, the time value according to the timing count during the black and white video recording in the third step is the first set time. A fourth step of recording the color video signal photographed by the surveillance camera after resetting the timing count if the value is reached; And a fifth step of resetting the timing count and performing a previous emergency recording mode determination step when the time value according to the timing count reaches the second preset time value during the color image recording in the fourth step. It features.

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 the input from the key input unit 18 and the intruder detection sensor 13 and outputs a high level (H) when the black and white image is selected to the video IC 11 and low when the color image is selected. It is configured to output the level (L).

The logic output for the black and white image or color image selection in the microcomputer 17 is designed to be switched output at a predetermined time interval counted by the timer (19).

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 18 from the normal state condition, the microcomputer 17 receives the intrusion detection input by the intruder detection sensor 13, and at this time, the high resolution image recording of high resolution. If the intruder is not detected even though the emergency recording mode is not selected or the emergency recording mode is selected, the video signal recording mode is displayed. Outputs a low level (L) from which to select.

Therefore, when an intruder is detected, the first output terminal out1 of the video IC 11 does not output the signal for color recording, and only the luminance recording current signal is applied to the preamplifier 14 only at the first output terminal out1. Thus, the image photographed by the surveillance camera is recorded on the video tape of the recorder 15 as a black and white image.

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.

The black-and-white processing recording of the video signal photographed by the surveillance camera is continued until the timing count value by the timer 19 reaches the first set time value registered in the microcomputer 17, and the first The timer 19 is reset after the black and white recording of the video signal photographed by the surveillance camera is completed for the set time. For example, the first preset time may be set to about 5 seconds.

A second time in which the timing count value by the timer 19 is registered in the microcomputer 17 while the color count signal input by the surveillance camera is recorded as it is on the video tape at the same time as the timing count is re-executed after the timer reset. Determine whether the set time is reached. Like the first setting time, the second setting time is set to about 5 seconds, and the color image recording time and the black and white image recording time may be differently set as necessary.

When the second set time ends, the color image recording mode is stopped, and if the intruder detection signal is continuously input from the intruder detection sensor 13, the scene situation recorded by the surveillance camera is repeatedly recorded in black and white and color images. When the intruder detection signal is not generated by the sensor by moving away from the surveillance area, continuous recording is made only in the color image.

Figure 4 shows the flow of the process of switching recording control of the video output of the surveillance camera according to the present invention.

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 sensing signal is generated in the second step, a timing count is recorded to determine the arrival of the first set time while recording the color image of the scene photographed by the surveillance camera. The black-and-white image by the luminance value from which the color component was removed from the image signal is recorded.

In the fourth step, when the time value by the timing count reaches the first preset time value that can be set to about 5 seconds during the black and white video recording according to the third step, the timing count is reset and photographed by the surveillance camera. Color video signals are recorded and recorded on video tapes without processing color video signals.

In the fifth step, when the time value by the timing count reaches the second set time value that can be set to about 5 seconds during the color image recording in the fourth step, the timing count is reset and it is determined whether the emergency recording mode is continued. In order to determine whether an intruder is detected by the intruder detection sensor, the process returns to the previous step.

Through the repetition of this process, in the recording mode, the intruder's impressions are recorded in a color image and a black and white image with a certain time interval, so that detailed information about the intruder can be obtained through tape playback.

As described above, the present invention provides a color image signal photographed by a surveillance camera during a first preset time in an emergency recording mode by detecting an intruder when performing surveillance for a specific region using a surveillance camera and a VCR. It records black and white images using only luminance signal, which is about 50 resolutions higher than the color recording method by deleting color components, and records the field situation on video tape. It is recorded on the video tape, and the emergency situation using the surveillance camera is recorded on the VCR's video tape alternately with high resolution black and white images and color image with color sense to reproduce the intruder's impression accurately and precisely. It has a distinctive effect that can be discerned.

Claims (1)

In the recording control method using the surveillance camera and VSI, the first step of determining whether the emergency recording mode is selected when the surveillance camera and the VCR are on; and determining that the emergency recording mode is not normal in the first step. A second step of continuously recording color images captured by the surveillance camera on a video tape and determining whether a sensing signal is input from an intruder detection sensor in an emergency recording mode; and timing counting when an intruder sensing signal is input in the second step. And at the same time, recording the black and white image from which the color component is removed from the video signal captured by the surveillance camera; and when the first set time is reached during the recording of the black and white image of the third step, the timing count is reset and monitored. A fourth step of recording the color image signal photographed by the camera on a video tape as it is; and the color image according to the fourth step Huazhong second predetermined monitoring the switching recording control method of a camera for sialic V, it characterized in that it comprises a fifth step of performing an emergency whether or not the recording mode determining step of when it reaches the time value, then resetting the count timing previous stage.