KR19990047793A - Camera Alarm System and Method Using Video Level - Google Patents

Abstract

An alarm device for a camera using a video level of the present invention includes a lens used to receive light information reflected from a subject; An imaging unit for converting an optical signal of the subject received from the lens into an electrical signal; An image signal processor configured to process the photoelectrically converted electrical signal into an image signal; And an A / D converter configured to convert an analog video signal received from the video signal processor into a digital video signal, the camera comprising: a warning unit for generating a warning sound or outputting a warning message; And a controller configured to control the warning unit to output a warning sound or a warning message when the video level input by the A / D converter does not belong to a preset video level range. do. In addition, the alarm method of the camera using the video level of the present invention, the alarm device of the camera using the video level, the step of reading the video level when a command to operate the alarm device of the camera is input; Determining whether the read video level falls within a preset standard video level range; And determining that an abnormality has occurred in the camera when the video level does not fall within the standard video level range as a result of the determination.

Description

Camera Alarm System and Method Using Video Level

The present invention relates to an alarm device and a method of a camera using a video level, and more particularly, based on a video level input through an image capturing unit, a video level for detecting an abnormality in a camera and alerting it to the outside. It relates to an alarm device and a method of a camera used.

Closed Circuit Tele-Vision (hereinafter referred to as CCTV) system, which is generally installed in a place where surveillance is required, displays one or more video cameras or video cameras that capture a surveillance target. It consists of a VCR that records the images captured by the monitor and the video camera for later playback.

In the CCTV system as described above, in order to effectively monitor, a large number of cameras are distributed and arranged in various places, which makes it difficult to manage because the cameras are not only remotely located but also remote from the monitoring station. There was this.

In particular, when an abnormality occurs in the camera, for example, when an intruder blocks the lens part of the camera, it cannot be detected quickly unless the surveillance officer keeps observing the monitor. There is a problem that cannot be done efficiently.

The present invention has been made to solve the above-described problems, and based on the video level input through the image pickup unit detects whether there is an error in the camera and alerts the outside to the video level to quickly know that there is an error in the camera An object of the present invention is to provide an alarm device and a method using a camera.

An alarm device for a camera using a video level of the present invention for achieving the above object includes a lens used to receive light information reflected from a subject; An imaging unit for converting an optical signal of the subject received from the lens into an electrical signal; An image signal processor configured to process the photoelectrically converted electrical signal into an image signal; And an A / D converter configured to convert an analog video signal received from the video signal processor into a digital video signal, the camera comprising: a warning unit for generating a warning sound or outputting a warning message; And a controller configured to control the warning unit to output a warning sound or a warning message when the video level input by the A / D converter does not belong to a preset video level range. do.

In addition, the alarm method of the camera using the video level of the present invention, the alarm device of the camera using the video level, the step of reading the video level when a command to operate the alarm device of the camera is input; Determining whether the read video level falls within a preset standard video level range; And determining that an abnormality has occurred in the camera when the video level does not fall within the standard video level range as a result of the determination.

1 is a system block diagram showing an alarm device of a camera using a video level of the present invention;

2 is a flowchart illustrating a camera alarm method using a video level of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10. lens, 20. imaging unit,

30. Video signal processor, 40. A / D converter,

50. key input, 60. OSD circuit,

70. video signal output, 80. warning,

90. Controls

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the camera alarm system and method using a video level according to a preferred embodiment of the present invention.

1 is a system block diagram showing an alarm device of a camera using a video level of the present invention. As shown in this figure, the alarm device using the video camera of the present invention is mounted on the front of the camera and used to receive the light information reflected from the subject. An imaging unit 20 for converting an optical signal into an electrical signal, an image signal processing unit 30 for processing an electrical signal photoelectrically converted by the imaging unit 20 into an image signal (a luminance signal, a color difference signal, a sync signal), and an image signal An A / D converter 40 for converting an analog video signal input from the processor 30 into a digital video signal, a key input unit 50 for setting various functions of the camera, an OSD for providing a specific text signal ( On Screen Display) The circuit unit 60, the image signal output unit 70 which sends the image signal processed by the image signal processing unit 30 to the VCR or the monitor, and emits a warning sound or warns when an error occurs in the camera. Kissing the warning unit 80 and the key input unit 50 that output a message, and if the video level input from the A / D conversion unit 40 does not fall within the preset video level range to determine that the camera has an error It is provided with a control unit 90 for controlling the unit 80 to output a warning sound or a warning message.

In general, the camera converts a light signal from the lens 10 into an electrical signal in the imaging unit 20, and the electrical signal converted in the imaging unit 20 is processed as an image signal and output at an appropriate video level. The lens 10 controls the lens 10, the image capturing unit 20, and the image signal processing unit 30 to maintain a constant video level.

However, if you deliberately cover the front of the camera with a lens with a lacquer or other object, the screen will darken and the video level will drop, and the video level will not change even if there is a problem with the lens or aperture. If the camera is moved by an external force, there will be a change in the video level.

2 is a flowchart illustrating a camera alarm method using a video level of the present invention. As shown in this figure, first, in step S10, it is determined whether a command for operating the alarm device of the camera has been input. If it is determined in step S10 that a command to operate the alarm device of the camera is input, the process proceeds to step S12 to read the video level from the A / D converter 40. In the next step S14, it is determined whether the video level read in the step S12 falls within the standard video level range (for example, about 80 IRE to 224 IRE; the standard non-dynamic level range can be arbitrarily adjusted by the user). As a result of the determination in step S14, if the video level read in step S12 falls within the standard video level range, it is determined that there is no abnormality in the camera, and the flow proceeds to step S15 to operate the camera normally, and step S12. If the video level read in does not fall within the standard video level range, it is determined that there is an abnormality in the camera, and the process proceeds to step S16 to activate the warning unit 80 to alert the camera to an external problem. At this time, the method of generating an alarm is to display a text (alarm message) on the video output signal so that the monitor can know it, to make an alarm sound by using a speaker to alert the outside, or to control the warning on the video output signal. There is a way to carry a signal.

The alarm device and method of the camera using the video level of the present invention are not limited to the above-described embodiments, and may be modified in various ways within the scope of the technical idea of the present invention.

According to the alarm device and method of the camera using the video level of the present invention as described above, based on the video level input through the image pickup unit detects whether there is an error in the camera and alerts the outside that the camera has an error. The effect is known quickly.

Claims (2)

A lens used to receive light information reflected from a subject; An imaging unit for converting an optical signal of the subject received from the lens into an electrical signal; An image signal processor configured to process the photoelectrically converted electrical signal into an image signal; And an A / D converter for converting an analog video signal input from the video signal processor into a digital video signal. A warning unit which sounds an alarm or outputs a warning message; And And a controller configured to control the warning unit to output a warning sound or a warning message when the video level input by the A / D converter does not belong to a preset video level range. Camera alarm using video level. In the alarm device of the camera using the video level, Reading a video level when a command for operating the camera's alarm device is input; Determining whether the read video level falls within a preset standard video level range; And And determining that an abnormality has occurred in the camera when the video level does not fall within the standard video level range as a result of the determination, and alerting the camera.