JP2002135764A - Television camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control each function and provide instantly images desired to watch by a monitoring person when detecting motion, and to allow recording/ reproducing of images before and after operation of motion detector function. SOLUTION: In a television camera, a motion detector function, a skip back memory function and an electronic zooming function are operated in interlocked manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television camera having a motion detector function, a skib-back memory function, and an electronic zoom function, which performs an electric pan / tilt turning operation, and in particular, a dome-shaped electric dome television camera. It is related to the improvement of the function.

[0002]

2. Description of the Related Art A function of a conventional television camera is to detect that a moving object is captured in a predetermined area of a subject video signal captured by the television camera, and to detect a change in a luminance signal. If a moving object is detected in the predetermined area, there is a motion detection (moving object detection) function for generating an alarm signal or the like. Further, the captured video signal is always recorded by overwriting the memory, and the alarm signal generated by the above-described motion detector function is used as a trigger signal, and the video signal before and after the alarm signal timing is recorded and held. There is a skip back memory function that allows the held video signal to be reproduced. Further, in order to obtain an enlarged video signal by interpolating a video signal imaged by the solid-state imaging device and interpolating a video signal of a part of one field into a video signal for one field. There is an electronic zoom function.

[0003]

In the above-mentioned prior art, the functions are not combined to be used for an electric dome camera, and a motion detector function, a skip back memory function, and an electronic zoom function are not provided. They are not linked. The purpose of the present invention is
By operating the motion detector function, skip back memory function, and electronic zoom function in conjunction,
When the motion detector function is operating, each function is controlled so that an image desired by the observer is instantaneously provided, and images before and after the operation of the motion detector function can be recorded and reproduced.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a dome-shaped television camera which performs an electric pan and tilt turning operation, and moves in a predetermined area of a subject video signal. A motion detecting means for detecting that the object is imaged, a skip-back memory for recording a video signal according to a predetermined period, and an imaging direction of the television camera being predetermined according to a result detected by the motion detecting means. The pan and tilt rotation operations are controlled so as to face the preset position, and lens control such as focal length control, zoom magnification control, and aperture control according to the detection result are performed. Recording a captured video signal in the skip-back memory and reproducing and outputting the recorded video signal Than it is. The present invention further provides:
It has an automatic zoom mode for enlarging the video signal in the predetermined area using an electronic zoom function.

Further, according to the present invention, two modes, a skip back memory mode and an auto zoom mode, are provided as control modes. In the skip back memory mode, when a moving object in an arbitrary setting area is detected by a motion detector function, an alarm signal is issued. Activate the skip-back memory function, control the panning, tilting, zooming, and focusing of the preset position set in advance. In addition, an automatic recovery time (recovery time) is provided, and after the set time elapses, the recorded image can be reproduced later, and control is performed so as to resume the operation before the occurrence of the alarm. On the other hand, in the auto zoom mode, the motion detector function
When a moving object is detected in the optional setting area, an alarm signal is generated, the setting area is automatically zoomed up, and it is possible to instantly provide an image of the alarm occurrence to the observer, and an automatic recovery time (Recovery time)
Is provided, and after the set time elapses, control is performed so that the image returns to the original image and the operation before the alarm is generated is restarted.

In the present invention, by doing so, the skip back memory mode, the auto zoom mode, and both functions are
In conjunction with the motion detector function, the pan / tilt turning operation, lens operation, or electronic zoom function can be operated, and when an alarm occurs, the image that the observer wants to see is instantly provided, and the alarm is generated The situation image before and after can be provided to the monitor.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 1, 2 and 3. FIG. FIG. 1 is a diagram illustrating an example of a block configuration of a television camera according to the present invention. A control signal is output from a control operation unit 11 to a turning control unit 15 of an electric dome camera 12. Further, a control signal is also sent from the television camera 13 to the turning control unit 15 as described later. The turning control unit 15 controls the pan drive motor 18 and the tilt drive motor 19 according to the input control signal. The television camera 13 includes a camera control unit 1
6 and a lens control unit 17, and the camera control unit 16
A control signal is output to the turning control unit 15 via the lens control unit 17.

Next, the operation of the television camera according to the present invention will be described with reference to FIGS. 2 and 3 which are flow charts for explaining the operation. First, after turning on the power of the television camera (Step 201), the observer operates the control operation unit 11 to set the motion detection function of the electric dome camera 12 in advance (Step 202). Settings include skip back memory mode,
Alternatively, select the auto zoom mode and set the automatic recovery time (recovery time), detection sensitivity, detection area,
Preset positions in the skip back memory mode, area selection in the auto zoom mode, and the like.

Here, when the set mode is the skip back memory mode (the mode in which the operation in the case of YES is performed in step 205), a moving object is detected (step 203). The fact that an alarm has occurred due to the operation of the function is displayed on the monitor and notified (step 204).

The camera control section 16 outputs a control signal to the effect to the turning control section 15 via the lens control section 17. The turning control unit 15 to which the control signal has been input controls the pan driving motor 18 and the tilt driving motor 19 (step 206) in order to perform pan and tilt turning and various lens controls to preset preset positions. At the same time, the lens control unit 17 is provided with preset position information of the zoom and focus positions of the lens to control the lens.

At the same time as these controls, the camera controller 16
Outputs an alarm signal upon detection of a moving object, and instructs a skip-back memory of the camera 13 to inhibit video signal recording (step 207). The skip back memory that has received the alarm signal records, for example, an image for four seconds before and after the occurrence of the alarm. If the recording capacity is made larger, the recording time can be made longer.

When the automatic recovery time (recovery time) is set (step 208), the automatic recovery time (recovery time) elapses unless the observer operates the control operation unit 11 (step 210). Stop the operation until). If the observer operates the control operation unit 11 on the way (step 209), it operates according to the instruction of the observer. This means that the watcher knows that an alarm has occurred,
This is designed to allow the user to operate the control operation unit 11 and perform a normal monitoring operation.

Next, when the set mode is the auto-zoom mode (the mode for performing NO processing in step 205), the camera 13 detects a moving object (step 20).
3) Then, the camera control unit 16 transmits the fact to the turning control unit 15 via the lens control unit 17 and stops the turning operation of the pan drive motor 18 and the tilt drive motor 19.

The camera control section 16 notifies the observer that the motion detection function has been activated and an alarm has occurred (step 204), and uses the electronic zoom function for an area that has been set in advance to convert the image. It is enlarged (step 211) and provided. As in the skip-back memory mode, when the automatic return time (recovery time) is set (step 212), the automatic return time (recovery time) elapses unless the observer operates the control operation unit 11 (step 212). The operation is stopped until 214). If the observer operates the control operation unit 11 on the way (step 213), it operates according to the instruction of the observer. This is designed to allow the observer to operate the control and operation unit 11 with knowledge of the occurrence of the alarm and to perform a normal monitoring operation.

In order to reproduce the image data stored in the skip back memory mode (step 215),
The observer operates the control operation unit 11, instructs the camera control unit 16 from the control operation unit 11 via the turning control unit 15 and the lens control unit 17, and reproduces the recorded image (step 21).
8) Yes.

During reproduction, the observer operates the control operation unit 11.
Is operated, the control operation unit 11 instructs the camera control unit 16 via the turning control unit 15 and the lens control unit 17 to stop reproduction of the recorded image (step 216). ).

Further, the observer operates the control operation unit 11 and
From the control operation unit 11 to the turning control unit 15 and the lens control unit 17
When the camera control unit 16 is instructed through the command to permit the video signal recording operation (step 217), the recorded image data is overwritten with the current image (step 220).
Then, it enters the next alarm occurrence standby state.

[0018]

As described above, in a television camera for surveillance use, the presence / absence of an alarm is notified to the observer using the motion detection function of the camera, and pan / tilt rotation, lens control, and electronic zoom are performed. By linking the functions, it is possible to instantly capture and display the subject related to the alarm occurrence, and to provide the situation image before and after the alarm to the monitor by recording the image using the skip back memory function It is possible to do. These lead to improved functions of the electric dome camera.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a television camera of the present invention.

FIG. 2 is a view showing a flowchart for explaining the operation of the television camera of the present invention.

FIG. 3 is an exemplary flowchart showing the operation of the television camera of the present invention.

[Explanation of symbols]

 11: Control operation unit 12: Electric dome camera 13: Camera (television camera) 15: Turning control unit 16: Camera control unit 17: Lens control unit 18: Pan drive motor 19: Tilt drive motor

Claims (2)

[Claims] 1. A television camera which performs an electric pan / tilt turning operation, a motion detecting means for detecting that a moving object is imaged in a predetermined area of a subject video signal, and a video signal corresponding to a predetermined period. Having a skip back memory for recording, and controlling the pan and tilt turning operations so that the imaging direction of the television camera is directed to a predetermined preset position position in accordance with the result detected by the motion detection means,
Performs lens control such as focal length control, zoom magnification control, and aperture control of the lens according to the detection result, and records video signals captured around the time of the detection in the skip-back memory. A television camera, which reproduces and outputs a signal. 2. The television camera according to claim 1, further comprising an auto zoom mode for enlarging a video signal in the predetermined area using an electronic zoom function.