JPS6231272A - Universal head controller - Google Patents

Abstract

PURPOSE:To improve an operability of an universal head by designating the optional point of the picture of the television image picked up by the first television camera and automatically driving the universal head of the second television camera (for broadcasting) so as to place this designated point at the center of an angle of view to optionally changing a shot only by designating a television picture. CONSTITUTION:A write pen 10 is pressed on a central point 22 of an image 21' of an object on a screen of a monitor television, a detecting signal 11 of a raster in the point of the screen is outputted and the raster address data 8 is inputted to a latch circuit 9. A focus position signal is transmitted from from a lens 1, which indicates the distance from the lens to the object 21 and a coordinate X22 of the point 22 based on these raster data and the distance data of the object are inputted to an arithmetic unit 16. The arithmetic unit 16 operates based on the inputted distance F21 of the object and the coordinate X22, generates a pan angle control signal 17 and a drive device 18 moves a broadcasting camera universal head 20 according thereto and catches the object 21 on the center of the screen by the broadcasting universal head 20.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a pan head control device, particularly to a pan head control device for remotely controlling a television camera.

<Prior art> In general, television broadcasting stations broadcast news, weather forecasts,
When the range of movement of the subject is relatively small, such as in interviews or educational programs, the operator uses the TV camera.

Alternatively, without directly operating the pan head, information on the amount of movement of the pan head in the horizontal direction (hereinafter referred to as pin), vertical direction (hereinafter referred to as tilt), zoom, focus, etc. is stored in advance in the pan head control device, A screen (hereinafter referred to as a shot) is created based on the above stored information by remote control from a monitor room. In this case, since the information for shots is determined and stored in advance, there is a lack of flexibility when shots other than shots based on the stored information are required, and shots are stored in correspondence with shot numbers.

The drawback was that it was difficult to see the contents of each shot. Furthermore, when setting each information when storing information for a shot, or when creating a shot different from the memorized shot, use the pan rotary encoder, tilt rotary encoder, or pan/tilt rotary encoder on the operation panel of the control device. It is necessary to operate a dual-purpose joystick to control the pan head, and in such an operation, the operator must concentrate his attention on both the TV monitor and the rotary encoder or joystick, so it is necessary to operate the pan head. It has the disadvantage of poor control operability, and the mechanical structure of the rotary encoder joystick also causes a lack of long-term reliability of the movable parts.

Purpose The present invention has been made in view of the above-mentioned matters, and it specifies an arbitrary point on a television image photographed by a first television camera, determines the specified position with respect to the television image, and determines the specified position with respect to the television image. By automatically driving the pan head of the second TV camera (for broadcasting) to center the field of view, the shot can be changed arbitrarily by simply specifying the TV image, which solves the above problem. The purpose of the present invention is to provide a pan head control device that provides a pan head control device.

<Embodiment> FIG. 1 is a block diagram showing the configuration of an embodiment of a pan head control device according to the present invention.

In the figure, l is a television camera, and lens 1 of the camera
The composite video signal 3 of the photographed image is input to a synchronization signal separation device 4 and a monitor television 5.

A synchronization signal separation device 4 extracts a synchronization signal 6 from the composite video signal 3 of the image. 7 is a raster address counter which manually inputs the synchronization signal 6 and synchronizes with the composite signal 3, and the contents of the counter 7 represent the raster position on the screen of the monitor television 5.

Reference numeral 10 denotes a light pen that includes a light-receiving element that detects the raster on the monitor television 5. By pointing the pen at an arbitrary point on the screen of the monitor television, a raster detection output 11 is generated and the raster at that position is detected. The corresponding counter 7
The contents of , ie, raster address data, are transferred to the latch circuit 9 .

Reference numeral 13 denotes a focus control device that drives the lens l of the television camera 2 using a focus drive signal 14 to perform a focusing operation.
From there, a focus position signal 15 corresponding to the subject distance is sent out.

Reference numeral 16 denotes an arithmetic unit constituted by, for example, a microcomputer, which performs the arithmetic operations described below based on the focus position signal 15 and raster address data 12, outputs a pan angle control signal 17 for the broadcast camera pan head 20, and outputs a pan angle control signal 17 to the drive device 18. tell.

The drive device 18 moves the pan head 2 based on the pan angle control signal 17.
Drive 0.

Next, the operation of the present invention with the above configuration will be explained. It is now assumed that a control television camera 2 and a broadcasting camera platform 20 are placed in a studio as shown in FIG.

In this state, the subject 21 is placed on the camera platform 2 as shown in the second figure.
A case will be described in which the pan head 20 is controlled so as to be centered on the screen of the camera No. 0. A subject 21 is photographed by a television camera 2, and an image 21' of this subject 21 is displayed on a monitor television 5. Since the subject 21 is located to the right of the central axis A of the camera 2 by 02I, the image 21' is projected on the screen of the monitor television 5 at a position shifted to the right by that amount from the center. ing.

Now, the angle of view of the television camera 2 is 01, the raster address at the center of the screen of the monitor television 5 is the origin, the X coordinate of the left edge of one screen is -X m, the X coordinate of the right edge of the screen is X m,
Furthermore, if the X coordinate of the center point 22 of the subject image 21' is expressed as X22, then the angle 021 between the subject 21 and the central axis A of the camera 2 is expressed as. Therefore, if the raster address coordinates
The angle θ21 formed by

On the other hand, by pressing the light pen 10 against the center point 22 of the subject image 21' on the screen of the monitor television 5, the light pen IO generates a raster detection signal 1 at the point 22 on the screen.
1 is output and the raster address data 8 at that time is held in the latch circuit 9, so the raster address data at one point 22 is detected by the latch circuit, and the above-mentioned coordinate X22 is detected.

That is, the synchronization signal 6 of the video signal of the image from the television camera 2 is input to the raster counter 7, and the contents of the counter 7 represent the raster position on the screen.
Since the raster address data (supported raster position) signal of the screen position l supported by the light pen is input to the latch 9, the coordinates X2 of the position indicated by the light pen
2 is detected.

Further, a focus position signal representing the distance to the subject 21 is sent from the lens 1, and the coordinates X22 of the point 22 and subject distance data based on these raster address data are input to the arithmetic unit 16.

If the combined object distance is F21, the coordinates of the object 21 in this studio (x2.

For Y21), if the coordinate origin is set at the principal point of lens l, the horizontal direction of the lens is the X axis, and the front and back direction of the lens is the Y axis, that is, X21 = F 2H# sin 021 ---
-(2) Y2I=F2111cosθ21 ---
−(3). On the other hand, if the center coordinates of the broadcast camera platform 20 are (X2G, Y21+) in the coordinate system, then the front direction of the broadcast camera platform 20 is parallel to the Y-axis direction of the coordinate system (A' force). In terms of the direction, the pan angle 020 for pointing the broadcast camera platform 20 toward the designated subject 21 is Y71-Y2O 020= tanI() -----(4)X 21
−X 2 G.

The calculation device 16 calculates the subject distance F21 into which the above calculation is input.
and coordinates X72, and issues a pan angle control signal 17 based on the calculation result, and the driving device 18 moves the broadcasting camera pan head 20 to a pan angle of θ2o accordingly, moving the subject 21 to the broadcast camera pan head. 20 to the center of the screen.

As described above, when the monitor television is pointed with the light pen, the broadcasting camera platform is automatically controlled so that the object of the instruction is placed in the center of the screen.

In the embodiment, the pan angle has been described, but in the case of tilt, automatic control of the tilt angle can be executed by performing similar calculations on the X-axis in the coordinate system described above.

Furthermore, in the above embodiment, there was one broadcasting camera pan head driven by this control camera, but the above equation (4)
Broadcasting camera head position 5ji X 2 a +
Since Y 2o is arbitrary, it is also possible to move an arbitrary number of broadcasting camera pan heads of two or more.

In addition, when driving multiple pan heads, the control system performs calculations equivalent to equations (1), (2), and (3), and calculations equivalent to (4) are added to the drive device of each pan head and performed by the calculation device. It is also possible to When such a configuration is adopted, it is also possible to configure the system with a plurality of control system units. In addition, instead of specifying one point on the screen on the monitor television, it is also possible to specify two points and use it to specify the angle of view for zooming of the lens of the broadcast camera platform. Also, a piezoelectric sensing panel placed on a monitor television screen can be used instead of a light pen.

Effects> As explained above, it is possible to control the desired panning and tilting angles of the broadcasting camera by simply using a light pen to indicate the desired panning and tilting angles from the position of the television screen that monitors images taken by the control television camera. This has the effect of improving the operability of the pan head.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a pan head control device according to the present invention, and FIG. 2 is an explanatory diagram showing the arrangement of the camera 1° pan head 20 of FIG. 1 in a studio. 2-m-TV camera 5-m-monitor TV lO-m-light pen 20-m-broadcast camera head

Claims (1)

[Claims] a first television camera; an image monitor device that monitors the image of the television camera; a detection circuit that detects the position of an arbitrary point on the surface image of the monitor device; and a drive control unit that drives a second television camera pan head so that the image position is captured at the center of the second television camera based on the image position.