JPS59110284A - Panhead system controller - Google Patents

Abstract

PURPOSE:To improve the reliability of panhead control operation by detecting the position of a TV camera from the position of a picture plane shotted by the TV camera installed on a panhead part and operating the panhead part on the basis of the detection signal. CONSTITUTION:Plural shot memory data for operating the panhead system consisting of the TV camera 1' and panhead 1 are recorded. When the panhead for selecting desired shot memory data among those memory data is operated, a panhead driving device 15 sets the camera 1' and panhead 1 at specific positions, and the camera 1' performs photography to project a picture on a monitor TV4. A photographer observes the picture and brings a light pen 10 into contact with a point 4b to generate a detection signal. This signal is inputted to a latch circuit 9 after waveform shaping 11, which latches the number of horizontal scanning lines counted by a counter 7. The amount of trimming to the center position 4a of the picture indicated by the counted value, i.e. the number of scanning lines is calculated 14 and the panhead part 1 is tilted by the amount.

Description

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

In general, television broadcasting stations provide news, weather forecasts,
When the range of movement of the subject is relatively small, such as in a conversation or educational program Class 7, the operator does not directly operate the TV camera or the pan head, but rather sends the camera to the pan head control device in the left and right direction (hereinafter referred to as panning) of the pan head. ), vertical direction (hereinafter referred to as tilt), zoom, focus, movement of camera height, etc., and the stopping position (hereinafter referred to as shot), etc., are stored in advance and can be remotely controlled from the monitor room. operating.

In this case, if the actual shot of the tripod head is different from the pre-stored shot memory, or if the tripod head is operated correctly but the subject moves after being memorized, the operator may while operating the pan rotary encoder, tilt rotary encoder, or joystick for both pan and tilt on the operation panel of the control device,
to move the pan head and correct the screen (hereinafter referred to as trimming).

). Therefore, in this kind of trimming, the operator has to concentrate on both the monitor TV and the rotary encoder or joystick, which has the disadvantage of poor operability of the pan head control. Due to its mechanical structure, the moving parts lacked long-term reliability.

An object of the present invention is to eliminate the above-mentioned drawbacks, and as a method for realizing this object, a desired position of the television camera is determined from the position of the television screen that monitors the image taken by the television camera mounted on the pan head. is detected by a light-receiving element, and the camera platform is operated based on the detection signal. This results in
This eliminates the need for mechanically moving parts such as rotary encoders and joysticks, improving the time reliability of the head control device.Furthermore, the operator can concentrate his attention on the most important monitor, the TV, and control the head. It becomes possible to improve operability.

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a block circuit diagram when performing tilt trimming of a pan head according to an embodiment of the present invention.

A composite video signal of images taken by a television camera /' is input to a synchronizing signal separation device 3 and a monitor telepig, which separates the signal into a horizontal synchronizing signal S and a vertical synchronizing signal B. The horizontal synchronizing signal 3 and vertical synchronizing signal B separated by the separating device 3 are input to the clock input terminal C and reset input terminal R' of the counter 7, respectively, and the counter 7 receives the first signal reset by the vertical synchronizing signal B. The number of scanning lines from the horizontal scanning line is counted, and the counted data g is input to the latch circuit W.

On the other hand, the light pen 10 including the light receiving element that detects the raster of the monitor telepig is connected to the waveform shaping device // that converts the raster detection output of the Ben 10 into a digital signal, and the digital signal of the shaping device // is transmitted to the latch circuit. is input as a latch signal 7.2.

/4' is an arithmetic device that calculates the signal latched by the latch circuit, and /4' is a pan head that drives the camera /' and pan head system by the signal calculated by the arithmetic device /g. It is a driving device.

The operation of one embodiment of the present invention will be described below.

The operator operates a pan head operating device (not shown) in which a plurality of shot memories for operating a pan head system consisting of a television camera and a pan head are recorded in advance, and a desired shot memory is selected from these memories. Then, the pan head drive device/
Yu starts and stops the television camera /' and the pan head / for a predetermined shot, and the television camera /' takes pictures. The image taken at this time is displayed on a monitor telepig.

When the operator observes the image projected on the monitor telepig and performs tilt trimming, that is, when trimming the point llb on the screen to the center lla of the image in the figure, when the operator presses the light pen 10 against the point lIb, the light The pen 10 generates a raster detection signal at point llb, and this detection signal is shaped by a waveform shaping device // and inputted to the latch circuit as a latch signal /,2,
Data g representing the number of horizontal scanning lines counted by the counter 7 is latched. At this time, the latched horizontal scanning line count data /3 indicates the central position, that is, the point lIa of the monitor telepicture.

The arithmetic unit /lI performs the following arithmetic operation in order to trim from point qb to point ga. That is, TO is the total tilt angle of the pan/head, Lθ is the vertical angle of view of the camera/' lens, H is the number of horizontal scanning lines on the TV screen, and is the number of horizontal scanning lines latched by the light pen 10. If the position signal for the entire tilt angle Tθ of the HC1 pan head is O to TO, then the tilted amount TT of the pan head portion is H/2−HCLθ HTO. Therefore, if the position of the pan head part/ is TN, the position TNN of the pan head part/ when tilted by trimming is TNN = TN + TT. Therefore, based on this calculation result, the pan head drive device/S tilts the pan head/to complete the trimming.

In the embodiment described above, in order to perform tilt trimming, the horizontal synchronizing signal A of the composite video signal Y is input to the clock input terminal C of the counter 7, and the vertical synchronizing signal B is input to the clock input terminal C of the counter 7, as shown in the counting section 2o indicated by the dotted line in FIG. The number of horizontal scanning lines is counted by inputting the signal to the reset input terminal R, but the signal from the oscillator/B is input to the clock input terminal C of the counter 7 at every 0° of the count section shown in It is also possible to trim the pan by inputting the horizontal synchronizing signal S separated by the synchronizing signal separating device 3 to the reset input terminal R and counting the frequency of the signal from the oscillator/O.

In addition, by combining the counter section shown in FIG. 1 and the counter section shown in FIG. 2, it is possible to perform both tilt and pan trimming with seven lights.

Further, in the above embodiment, the horizontal and vertical synchronization signals are separated from the composite video signal, but the same effect can be obtained even if the horizontal and vertical synchronization signals are obtained from independent oscillation sources, and both horizontal and vertical synchronization signals can be obtained from separate oscillation sources. The same effect can be obtained even if both signals are separated from the oscillation source that outputs the signals.

As explained above, from the position of the TV screen that monitors the image taken by the TV camera mounted on the pan head,
By detecting the desired position of the television camera with a light pen and performing trimming based on the detection signal, reliability is improved by eliminating the mechanical part for trimming in the pan head control device, and further improving the operator's monitor position. The effect of focusing attention on the TV and improving the operability of pan head control.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram of one embodiment of the present invention, and FIG. 2 is a counter circuit diagram of FIG. 7. FIG. 2 is a partial block circuit diagram in which . /...Homura r,,2...TV camera...
Monitor TV 10...Light pen patent applicant Canon Co., Ltd.

Claims (1)

[Claims] Pan head system control that detects the desired position of the television camera using a light receiving element from the position of a television screen that monitors images taken by a television camera mounted on the pan head, and operates the pan head according to the detection signal. Device.