JPH04196774A - Video camera device - Google Patents

Abstract

PURPOSE:To easily change the setting of a field angle by displaying a frame of operation designation to a video signal output and operating a motor-driven tripod head and a motor-driven zoom lens based on the information. CONSTITUTION:A frame 23 of a video signal output from a video camera 7 is superimposed through a superimposing circuit 6 and outputted to a monitor television receiver 5. In order to start the operation, at first frame setting input switches 1, 2 and a position input switch 3 are used to set the frame 23 to a desired position, and a microcomputer 4 reads values of a zoom potentiometer 10, a vertical movement potentiometer 14 and a horizontal potentiometer 16 and stores them. In this case, the size of the frame 23 on a screen is changed depending on the values and an object field angle is always displayed so that the frame 23 is controlled to be fully occupied in the field angle of the monitor television receiver 5 finally. Thus, a motor-driven tripod head 12 and a motor- driven zoom lens 8 are controlled to obtain an object field angle.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for a video camera having an electric pan head and an electric zoom lens.

[Conventional technology]

Conventional monitoring devices are designed to control the pan head in accordance with signals from a detection circuit. However, when it becomes necessary to manually control the camera, it is necessary to hold the button down and wait until the desired angle of view is achieved, since the operating speed of electric pan heads and electric zoom lenses is generally slow.

[Problem to be solved by the invention]

In conventional video camera apparatuses, no consideration has been given to operability during manual operation, and it is necessary to press and hold buttons when operating the apparatus.

[Means to solve the problem]

The above purpose is to display a frame on the video output of the video camera to specify the desired location and angle of view on the screen, and based on this information, the electric pan head and electric zoom lens are set within the range specified by the frame. This is achieved by controlling the angle of view to match the angle of view.

[Effect]

You can easily change the angle of view by simply specifying the frame on the screen.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 and FIG. 3 are image examples of the embodiment.

As shown in FIG.
The camera is mounted on the stand 11, and the zoom lens 8 is fixed on the base 11.
is installed. When the subject shown in FIG. 2 is being imaged, the video signal output from the video camera 7 passes through the superimposing circuit 6, superimposes the frame 23, and outputs it to the monitor television 5. To start the operation, first set the frame 23 at a desired location using the frame number constant input switch 1.2 and the position input switch 3. Microcomputer 4
At this time, the values of the zoom potentiometer 11, the vertical potentiometer 14, and the left and right potentiometers 16 are read and stored. This value and the angle of view set by the frame settings are calculated, and the zoom potentiometer 11, the vertical potentiometer 14, and the left and right potentiometer 1
Determine the target value of 6. Based on this target value, the microcomputer 4 controls the vertical relay 17, the left/right relay 18, and the zoom relay 19, and connects the positive power supply 20 or negative power supply 21 to the zoom motor 9, the vertical motor 13, and the left/right motor 15. zoom potentiometer 11, vertical potentiometer 14, left and right potentiometer 1
Control is performed so that 6 becomes the target value. The microcomputer 4 also operates a zoom motor 9, a vertical motor 13, and a left/right motor 1.
5, the zoom potentiometer 11,
The values of the vertical potentiometer 14 and the horizontal potentiometer 16 are read, and the size of the frame 23 on the screen is changed according to the values to always display the target angle of view. Finally, control is performed so that the frame 23 corresponds to the angle of view of the monitor television 5, as shown in FIG.

〔Effect of the invention〕

According to the present invention, by simply specifying a frame on the screen, the electric pan head and electric zoom lens can be easily controlled to obtain the desired angle of view8.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a diagram of designating a cursor and frame on a monitor screen, and FIG. 3 is a diagram of the monitor screen after control. (Explanation of symbols) 1... Frame number constant input switch, 2... Frame number constant input switch, 3... Position input switch, 4... Microcomputer,
5...Monitor TV, 6...Superimpose circuit, 7...Video camera, 8...Electric zoom lens, 9
... Zoom monitor, 10... Zoom potentiometer, 11... Camera mounting base, 12... Electric pan head, 13... Up/down motor, 14 Up/down potentiometer, 15... Meter for left and right, 16... Potentiometer for left and right, 17... Relay for up and down, 18...
・Relay for left and right, 19... Relay for zoom, 20...
Positive power supply, 21... Negative power supply, 22... Subject, 23... Frame.

Claims (1)

[Claims] 1. In a monitoring system consisting of a video camera, an electric pan head, an electric zoom lens, an electric pan head, and an electric zoom lens control device, an operation designation frame is displayed on the video signal output, and based on this information, the electric pan head and A video camera device characterized by operating an electric zoom lens.