JPH0638636B2 - Pan head camera device - Google Patents

Description

The present invention relates to a pan head controller, and more particularly to an automatic pan head device for operating a television camera.

<Prior Art> Generally, in a television broadcasting station, when shooting a program such as a news item or a weather forecast in which the moving range of an object is relatively small, the operator operates each screen (shot ), The amount of horizontal movement of the pan head (hereinafter referred to as pan), the vertical direction (hereinafter referred to as tilt) zoom / focus amount, etc. are stored in advance and the monitor room or remote control is performed during actual shooting. , The stored information is read out for each screen and each screen is photographed.

Since the stored information for each screen represents the pan angle and tilt angle for the camera at the fixed position, if the camera is moved after storing the information for the screen, the contents of the screen will be displaced by the amount of movement. was there.

<Purpose> The present invention has been made in view of the above-mentioned matters.
Even if the pan head device moves, the above problem cannot be solved by automatically correcting the camera / pan head device to the correct screen for the subject based on the movement information and the subject distance information before the movement. It is what

And, the feature of the present invention is that, in the automatic platform apparatus for setting the photographing state of the camera mounted on the movable carriage, the moving direction and the moving distance of the platform apparatus are set when the platform apparatus is moved by the movable carriage. First detecting means for detecting, second detecting means for detecting the focus position of the lens in the camera before movement, and the first detecting means.
And arithmetic processing means for performing arithmetic operation for setting the camera focus position and camera direction after movement based on the movement direction, movement distance and the focus position detected by the second detection means, and the arithmetic processing. A means for driving and controlling the focus position of the camera platform device and the camera so as to catch the subject based on the amount of calculation calculated by the means.

<Embodiment> FIG. 1 is a block diagram showing an embodiment of a camera platform camera system according to the present invention.

In the figure, reference numeral 1 denotes a dolly including wheels 2, which supports a television camera 4 including a platform 3 and a lens 5. The dolly 1 is movable on wheels 2.

A wheel rotation angle detector 6 is mounted on the wheel 2 to detect the rotation angle of the wheel 2 and sends a rotation angle signal 6'representing the rotation angle. A wheel angle detector 7 is mounted on the axle and detects the angle of the axle and sends a direction signal 7'representing the angle. 8
Is a focus driving module for driving the lens 5 to perform focusing and sending out a focus position signal 8'representing the focus position of the lens.

An arithmetic processing unit 9 inputs the direction signal 7 ', the angle signal 6'and the position signal 8', and the position coordinates when the dolly 1 moves from one point to another based on the direction signal and the angle signal will be described later. Further, the pan angle and the focus distance after the movement are obtained by the following equations based on the coordinates and the subject distance before the movement obtained by the focus position signal.

Reference numeral 12 is a drive device for inputting the control signal 10 representing the pan angle from the processing device 9 to drive the platform 3 to perform the pan angle control. A signal representing the focus distance obtained by the processing device 9 is input to the module 8 as a focus position signal 11 corresponding to the distance to control the focus of the lens 5.

Now, it is assumed that the camera platform camera system including the camera platform 3 and the dolly 1 is arranged at a point a in the plane as shown in FIG. The pan angle θ of the pan head at this time is 0 °
Let d be the subject distance obtained from the focus position signal 8 ′ for the subject 13 in the state where the subject 5 is focused by the lens 5 by the module 8, and let the point a be the origin and the pan angle direction be the y-axis. Did x
-Y The position of the subject 13 in the Cartesian coordinate system is (0, d)
Is represented. Further, when the platform camera system moves from the point a to the point b, the position of the point b in the coordinate system indicates the direction signal 7 ′ emitted by the axle angle detector 7 by θ ° and the wheel rotation angle emitted by the wheel rotation angle detector 6. When the signal 6'is γ ° and the diameter of the wheel 2 is D, the distance between a and b is D · π · γ / 360
And the coordinates of the point b with respect to the point a are ((D ・ π ・ γ
/ 360) ・ sinθ, (D ・ π ・ γ / 360) ・ cosθ)
It is represented by. Therefore, in order to photograph the subject 13 at the point b, the pan angle of the pan head 3 should be changed from the state where the pan angle is set to the point a.
^-1 ((d- (D ・ π ・ γ / 360) ・ cos θ) / (D ・
π · γ / 360) · cos θ)) If the lens is turned, the lens faces the subject 13. On the other hand, the focus position of the lens 5 at the point b is If the focus is set to a distance of, the subject will be in focus when moving to point b.

Therefore, when the tripod camera system at the point a moves to the point b, the direction signals 7'and the rotation angle signals 6'from the axle angle and wheel rotation angle detectors 7 and 6, and the focus position at the point a. The signal 8'is input to the processing circuit 9, the above-mentioned arithmetic processing is performed, and the control signal 10 representing the pan angle calculated by the above-mentioned arithmetic is transmitted to the drive device 12, and the pan angle is controlled by the platform 3. Set the subject so that it is at the center of the screen. Further, the focus control signal 11 corresponding to the distance obtained by the above calculation is inputted to the module 8,
Based on this signal, the focus position control of the lens 5 is performed by the module 8 to focus the subject 13.

As described above, according to the present invention, even if the platform is moved, the pan angle and the like are automatically adjusted, and a correct screen for the subject can be guaranteed.

Incidentally, in the above-mentioned embodiment, the panfocus calculation control is discretely performed at the points a and b, but the control can be performed at any time during the movement, so that the subject is always caught in the screen and the focus is achieved. It is possible to dolly the camera while doing so. In addition, the control of the present invention can be performed by the dolly method, either manually or automatically or by remote operation.

Further, although an example of tilt is not described in the embodiment, it goes without saying that tilt control can be similarly executed.

<Effect> As described above, the dolly's moving direction and distance are detected, and the camera platform is controlled by knowing the subject distance from the focus position, so that the automatic platform can be set freely even after the shot is set in the studio. It is possible to move around automatically, widen the range of use of the automatic platform, and remove the restrictions due to the use of the automated platform. In addition, there is an effect that the subject is always captured in the center of the screen while dolly, and the shooting, which is difficult for a human photographer, can be easily performed, such as matching the focus.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a camera platform camera device according to the present invention, and FIG. 2 is an explanatory diagram for explaining the operation of the device of the present invention. 6 …… Wheel rotation angle detector 7 …… Wheel angle detector 8 …… Focus drive module

Claims (1)

[Claims] 1. An automatic pan head device for setting a photographing state of a camera mounted on a moving carriage, wherein a first moving direction and a moving distance of the pan head device are detected when the pan head device is moved by the moving carriage. Detecting means, second detecting means for detecting the focus position of the lens in the camera before moving, and moving based on the moving direction, moving distance and the focus position detected by the first and second detecting means. After that, an arithmetic processing unit that performs an arithmetic operation for setting the focus position of the camera and the direction of the camera, and the pan head device and the camera for capturing the subject based on the arithmetic amount calculated by the arithmetic processing unit. A pan head camera device comprising means for driving and controlling a focus position.