JP3247416B2 - Method for controlling shooting angle of television camera in monitor device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a photographing angle when photographing a subject with a television camera.

[0002] When a subject is photographed by a television camera, the photographing angle is generally changed by a manual operation of a cameraman to set an optimum photographing angle. However, when the operation cannot be performed directly, a method of controlling the photographing angle by a remote control is adopted. There are also many cases where the shooting angle of a television camera is fixed only for practical necessity. For example, a television camera for monitoring the rear of a vehicle is a good example.

On the other hand, when the photographing angle is controlled by a remote control, the operability and controllability determine the goodness as a man-machine interface.

On the other hand, a joystick as an operation / instruction means is an excellent man-machine interface. That is, the operation is easy, and the operation direction and the operation amount can be given by the output signal corresponding to the rectangular coordinates.

Therefore, there is a demand for a method of controlling the photographing angle by using a joystick as the photographing angle variable command means.

[0006]

2. Description of the Related Art FIGS. 8A and 8B are diagrams for explaining a rear-view television camera mounted on a vehicle. FIG.
FIG. 3 is a block diagram illustrating a configuration of a monitor device.

[0007] When the rear of the vehicle is difficult to see from the driver's seat, as in the case of a cargo-carrying vehicle 3 or the like, the rear monitoring television camera 1 is used as a driver's visual aid to enhance the driving safety. That is, the television camera 1 is attached to the rear of the vehicle 3 and the captured image is confirmed on the monitor television 2 in the driver's seat. This is a so-called monitor device.

Generally, the television camera 1 for monitoring the rear and the monitor television 2 operate in conjunction with the operation of the reverse gear of the vehicle. That is, the power is turned on.

That is, a video signal is supplied from the television camera 1 to the monitor television 2, and the television camera 1
Power control signal S _PC and power control signal S for monitor TV 2
Gives the _PM from the operation control unit 4, the power supply control signal S _PC, S
ON / OFF of the power supply is controlled by _PM . The operation control unit 4 is activated by a reverse gear operation signal S _R obtained from the vehicle, and outputs power control signals S _PC and S _PM .

That is, only when the vehicle moves rearward, the operation is performed to secure the rear view.

[0011]

However, in the conventional monitor device, the photographing angle of the rear-viewing television camera 1 cannot be changed in the driver's seat. That is, the rear monitoring television camera 1 is fixedly attached at a predetermined angle.

Therefore, even if the image to be checked is interrupted at the end of the screen of the monitor television 2, the entire interrupted image cannot be checked. That is, complete safety confirmation cannot be performed.

For this reason, a monitor device capable of changing the shooting angle of the television camera 1 is required. However, if the operability and controllability are poor, the driver does not have to perform the operation for changing the shooting angle one by one. In other words, it is troublesome.

The technical problem of the present invention is to improve the safety by using a joystick as an operation / instruction means for changing the shooting angle of a television camera and establishing a shooting angle control method with good operation / controllability. An object of the present invention is to realize a highly user-friendly monitor device.

[0015]

FIGS. 1A and 1B are diagrams illustrating the basic principle of the present invention. FIG. 1A is a block diagram illustrating the configuration of a monitor device, and FIG. 1B is a diagram illustrating operating coordinates of a joystick. ,. Note that (b) has the same meaning as expressing the joystick output signals S _X and S _Y in the XY coordinate system.

In order to solve the above technical problem, the present invention is a monitor device which varies a shooting angle of a television camera in a direction corresponding to a joystick operation direction at a speed corresponding to a joystick operation amount. In an imaging angle control device obtained by quantizing an operation amount into at least two or more regions, when an operation speed of the joystick exceeds a predetermined speed, a variable speed of an imaging angle determined by the operation amount It is characterized in that control is performed at a variable speed corresponding to an operation amount one step higher than that of the operation amount.

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

That is, on the orthogonal XY coordinates, the origin of X = 0, Y = 0 (S _X = 0, S _Y = 0) corresponds to the position where the joystick 7 is not operated. Coordinate position X = given by signal magnitude
S _X , Y = S _Y means that the direction given from the origin position corresponds to the operation direction θ, and the distance operation amount L from the origin position is
Corresponds to.

Therefore, the operation amount L of the joystick 7 is classified and quantized for each predetermined size, and the classified operation regions (region-1, region-2, region-3,...)
If the variable speed of the shooting angle is changed stepwise for each area (-n), a variable speed of the shooting angle corresponding to the operation amount of the joystick 7 can be provided.

For example, when the operation amount of the joystick 7 is
If the area is increased from area-1 → area-2 → area-3 →... → area-n, the variable speed of the shooting angle can be increased accordingly.

The operation direction θ of the joystick 7 is
Since it can be obtained from the magnitudes of the output signals S _X and S _Y (θ = tan ⁻¹ (S _Y / S _X )), the relevant operation direction θ
The shooting angle can be changed.

[0033]

[0034]

[0035]

(2) Method of Controlling Shooting Angle Sensitive to Operation Speed of Joystick The operation speed of the joystick 7 and its output signal are S _X ,
The magnitude of the change rate of S _Y are identical.

Therefore, in this photographing angle control method,
When the operation speed of the joystick 7 exceeds a predetermined speed, the joystick 7 is controlled to a variable speed corresponding to an operation amount one step higher than the variable speed of the shooting angle determined by the operation amount L.

For example, when the joystick 7 is rapidly operated from the area-1 to the area-2, the speed is controlled to a variable speed corresponding to the area-3. That is, it is possible to perform variable control of the photographing angle taking in the intention of the operator who operates the joystick 7.

It should be noted that the speed may be controlled to a variable speed corresponding to a higher-order operation amount of two or more steps.

[0040]

Next, a method of controlling a photographing angle according to the present invention will be described.
An actual example of how this can be embodied will be described in an embodiment.
In the present embodiment, an in-vehicle rear monitoring television camera (monitor device) is taken as an example.

(1) Device Configuration FIGS. 2A and 2B are diagrams for explaining the configuration of the embodiment. FIG. 2A is a block diagram showing the configuration of the monitor device, and FIG. 2B is a model diagram for explaining the configuration of the joystick. .

That is, the monitor device 8 is provided with a joystick 7a on the monitor television 2b.
1b is provided with a drive unit 13 that can change the horizontal shooting angle and the vertical shooting angle of the television camera 1b.

The horizontal angle / vertical angle drive section 13 includes a stepping motor and a rotation reduction mechanism, and has a configuration in which the horizontal and vertical angles are controlled in an open loop. Of course, closed loop control may be used. And
The horizontal angle / vertical angle drive unit 13 is configured to be driven by the motor drive unit 12 with electric power. That is, the drive signal _DD2 is that.

The motor drive unit 12 is a control microcomputer
(Microcomputer System) 11 is activated by the drive data D _D1 to output, it is configured to output the drive signal D _D2.

On the other hand, the voltages V _X , V output by the joystick 7a in accordance with the operation amounts on the XY operation coordinates.
_Y is A / D converted by an A / D (Analog to Digital) converter 10, and the converted signals S _X and S _Y are input to a control microcomputer 11.

Therefore, the control microcomputer 11 can recognize the operation amount and the operation direction of the joystick 7a from the magnitudes of the signals S _X and S _Y , and realize the variable control of the photographing angle on its software. be able to.

[0047] Incidentally, in this embodiment, enter the reverse gear operation signal S _R of the vehicle to the control microcomputer 11, only when the reverse gear is operated to turn ON the power of the television camera 1b and monitor television 2b Configuration. That is, the power control signal S _PM power control signal S _PC and the monitor TV 2b of the television camera 1b, power ON / OF
This is a configuration for performing F control.

Note that the joystick 7a has a configuration illustrated as a model in FIG. 2 (b).

That is, the X-axis of the X-coordinate interlocked with the operation knob 9 of the joystick 7a has an X-axis potentiometer.
14 and a Y-axis potentiometer 15
It has.

That is, the potentiometers 14 and 15 rotate according to the operation amount of the operation knob 9, and the output voltages V _X and V _Y according to the operation amount can be obtained. Therefore, the output voltages V _X , V _Y and the operation coordinates X, Y of the operation knob 9 can be treated as having the same meaning.

(2) Data Table for Specifying Operation Direction and Operation Amount of Joystick FIG. 3 is a diagram for explaining a data table for specifying the operation direction and operation amount of the joystick.

That is, the operation amount of the joystick at the X coordinate and the Y coordinate is {30H to {} of the A / D conversion data.
Convert to 8AH and handle. The operation origin data is X,
Y = 58H, 58H.

In this embodiment, the operation direction of the joystick is quantized in eight directions. That is, there are eight directions indicated by A to H on the drawing. Further, the operation amount of the joystick is quantized and handled in three regions. In other words, there are three areas indicated by ~ in the figure.

It should be noted that the operation origin X, Y = ＄ 58H, the hatched portion surrounding the # 58H, that is, the operation coordinates X, Y = ＄ 62H, # 62.
A rectangular area surrounded by H indicates that the area is handled as a no-operation area.

That is, by storing the coordinate quantization data corresponding to FIG. 3 as a mapped data table in the memory of the control microcomputer 11 (FIG. 2A), the control microcomputer 11 Data obtained by searching the data table with the signals S _X and S _Y and quantizing the operation direction and operation amount of the joystick (operation directions A to H, operation amount)
Can be obtained as

(3) Control Procedure of Photographing Angle-1 Next, how the control microcomputer 11 controls the photographing angle will be described. Note that, in the control procedure-1 of the item (3), the control procedure is as follows. Main routine, b. A description will be given of two levels of the coordinate calculation routine.

A. Main Routine FIG. 4 is a flowchart illustrating a control procedure-1 of the photographing angle. Step S101 represents the operation of operating the joystick by the vehicle driver, that is, the operator.

That is, it is determined in step S102 whether or not the reverse gear has been operated. If the reverse gear has been operated, the flow proceeds to step S103 to operate the television camera and the monitor television. That is, the power is turned on.

Subsequently, in step S104, it is determined whether or not the joystick is operated, and if not, the flow returns to step S101 to wait for joystick input. However, if the joystick is operated in step S104, the process proceeds to step S105, and the variable direction and variable speed of the shooting angle of the television camera are calculated and obtained from the operation direction and operation amount of the joystick.

In this calculation, the variable direction and the variable speed of the photographing angle to be controlled are determined by using coordinate data X in the XY coordinate system.
_n, computed as Y _n. The calculation method is described in b.
The coordinate calculation routine will be described in detail.

Then, in step S106, the calculated coordinate data X _n and Y _n are stored and held in the memory of the control microcomputer. This memory (coordinate memory) is a pointer for storing the shooting angle of the television camera.

Thereafter, the flow shifts to step S107, where drive data corresponding to the calculated coordinate data X _n , Y _n is provided to the motor drive unit. That is, the horizontal angle / vertical angle drive unit operates to change the shooting angle of the television camera in a predetermined coordinate direction. Then, the process returns to step S101 to repeatedly execute the same processing routine.

On the other hand, if it is determined in step S102 that the reverse gear has not been operated, the flow shifts to step S108, where the television camera and the monitor television are operating (power supply OFF).
N) is determined. If the television camera and the monitor television are not in operation, the monitoring device has not been activated since the beginning, so that step S101 is not performed.
Then, the process returns to step S102 to wait for the operation of the reverse gear.

If it is determined in step S108 that the television camera and the monitor television are operating, step S109
Migrated to, the television camera and monitor TV operation is stopped, with reference to the coordinate data X _n, Y _n stored in Step S106 At step S110, returns the imaging angle of the TV camera to the initial value.

That is, the sign of the stored coordinate data X _n , Y _n is reversed, and drive data corresponding to − (X _n , Y _n ) is given to the motor drive unit. That is, the horizontal angle / vertical angle drive unit operates to return the shooting angle of the television camera to the initial coordinate direction (X _n = 0, Y _n = 0).

Then, the coordinate memory is cleared in step S111, and the process returns to step S102 following step S101 to wait for the operation of the reverse gear.

However, if it is not necessary to return the shooting angle of the television camera to the initial coordinate direction in the operation mode of the monitor device, steps S110 and S111 may be deleted.

B. Coordinate calculation routine Coordinate data of the shooting angle in this example, that is, X _n , Y _n
Is performed as follows.

FIGS. 5A and 5B are diagrams for explaining a data table for calculating coordinate data for determining the shooting angle of the television camera. FIG. 5A is a diagram showing a data table corresponding to an operation amount area, and FIG. Is a chart showing a data table corresponding to an operation amount area, and (c) is a chart showing a data table corresponding to an operation amount area. In addition, area ~
Is the amount of operation of the joystick shown in the mapped data table of FIG.

That is, when the operation amount of the joystick is an area, the coordinate data calculated in step S105, that is, the data X _n , Y representing the photographing angle as angle data in the respective coordinate directions of the XY coordinate system. _n is the following 1)
Calculate as in ~ 8). It is assumed that the coordinate data before the joystick operation is X ₁ and Y ₁ .

[0071] 1) If the operation region of the _{"A" X n = X 1} +0, Y n = Y 1 +1 That is, in this case, there is no change in the imaging angle of the X-axis direction, the Y-axis direction This means that the shooting angle is changed by + 1 °.

[0072] 2) Operation when the region is _{"B" X n = X 1} +1, if Y _n = Y ₁ +1 This is a shooting angle to the imaging angle and the Y-axis direction of the X-axis direction, by both + 1 ° It means to be variable.

The same applies to the following 3) and thereafter.

[0074] 3) If the operation region of the _{"C" X n = X 1} +1, Y n = Y 1 +0

[0075] 4) If the operation region of the _{"D" X n = X 1} +1, Y n = Y 1 -1

[0076] 5) If the operation region of the _{"E" X n = X 1} +0, Y n = Y 1 -1

[0077] 6) When the operation areas of the _{"F" X n = X 1} -1, Y n = Y 1 -1

[0078] 7) If the operation region of the _{"G" X n = X 1} -1, Y n = Y 1 +0

[0079] 8) If the operation region of the _{"H" X n = X 1} -1, Y n = Y 1 +1

When the operation amount of the joystick is an area, the calculation of the coordinate data X _n and Y _n of the photographing angle in step S105 is performed as in the following 9) to 16) as in the case of the area. To do.

[0081] 9) If the operation region of the _{"A" X n = X 1} +0, Y n = Y 1 +2

[0082] 10) if the operation region of the _{"B" X n = X 1} +2, Y n = Y 1 +2

[0083] 11) if the operation region of the _{"C" X n = X 1} +2, Y n = Y 1 +0

[0084] 12) if the operation region of the _{"D" X n = X 1} +2, Y n = Y 1 -2

[0085] 13) if the operation region of the _{"E" X n = X 1} +0, Y n = Y 1 -2

[0086] 14) if the operation region of the _{"F" X n = X 1} -2, Y n = Y 1 -2

[0087] 15) if the operation region of the _{"G" X n = X 1} -2, Y n = Y 1 +0

[0088] 16) if the operation region of the _{"H" X n = X 1} -2, Y n = Y 1 +2

That is, it means that the photographing angle changes by 2 ° in the coordinate data calculated in one step of step S105, and the variable speed is doubled.

Further, when the operation amount of the joystick is an area, the calculation of the coordinate data X _n and Y _n of the photographing angle in step S105 is similarly performed in the following 17) to 24)
Do as follows.

[0091] 17) if the operation region of the _{"A" X n = X 1} +0, Y n = Y 1 +3

[0092] 18) if the operation region of the _{"B" X n = X 1} +3, Y n = Y 1 +3

[0093] 19) if the operation region of the _{"C" X n = X 1} +3, Y n = Y 1 +0

[0094] 20) if the operation region of the _{"D" X n = X 1} +3, Y n = Y 1 -3

[0095] 21) if the operation region of the _{"E" X n = X 1} +0, Y n = Y 1 -3

[0096] 22) if the operation region of the _{"F" X n = X 1} -3, Y n = Y 1 -3

[0097] 23) if the operation region of the _{"G" X n = X 1} -3, Y n = Y 1 +0

[0098] 24) if the operation region of the _{"H" X n = X 1} -3, Y n = Y 1 +3

That is, this means that the photographing angle changes by 3 ° in the coordinate data calculated in one step of step S105, and the variable speed is tripled. In other words, considering the area as a reference, the area has a double variable speed and the area has a triple variable speed.

Note that the initial coordinate data X ₁ and Y ₁ in the calculation operations 1) to 24) are obtained from step S105 to step S105.
In the case where the loop processing to S107 has completed one cycle and the arithmetic processing is performed for the second and subsequent times, X _n and Y _n are obtained.

(4) Photographing Angle Control Procedure-2 Next, a control procedure for smoothly performing a speed change control at a speed that varies the photographing angle will be described. That is, this is the control procedure shown in FIG. 6, and is a flowchart for explaining the control procedure-2 for changing the shooting angle. This procedure shown in steps S201 to S211 is an example in which the calculation work in step S105 shown in FIG. 4 is shown as a specific procedure for smoothly changing the shooting angle.

On the other hand, in this control procedure-2, a counter N, a flag F ₀ and a flag F _n are set, and the counter N
The addition and subtraction of the coordinate data X _n and Y _n is performed using the value of
In the state of the flag F ₀ (“1” or “0”), it is determined whether or not the joystick is in the non-operation state. In the state of the flag F _n (“1” or “0”), the variable speed of the shooting angle is reduced. The configuration is such that it is determined whether or not a control that smoothly changes is performed.

Incidentally, the flag F ₀ = “1” indicates that the joystick is not operated, and the flag F _n =
“1” indicates that smooth control is being performed.

The timing at which the control microcomputer 11 (FIG. 2 (a)) reads the conversion output signals S _X and S _Y of the A / D converter 10 (FIG. 2 (a)) is intermittent, and the system control routine It is assumed that the reading operation is performed cyclically at the cycle determined by.

FIG. 6 shows an example in which the joystick is operated in the operation direction "H" and the operation amount is an area. However, in other operation directions or operation amount areas, the processing operation may be performed in the same procedure.

A. Activation determining step of smooth control words, with reference to the flag F ₀ In step S201, A
At the previous timing of reading the conversion output signals S _X and S _Y of the / D converter 10 (FIG. 2A), it is determined whether or not the joystick is in the non-operation state (F ₀ = 1). if there was a no-operation state, the process proceeds to step S202, and sets the number 1 to the counter n, "1" is set to the smoothed control flag F _n. Then, "0" is set to the flag F ₀ at step S203.

B. Calculation Step of Coordinate Data Representing Shooting Angle Thereafter, in step S204, the value of the counter N, that is, the numerical value 1, is subtracted from the shooting angle coordinate data _Xn of the current X coordinate. That is, the angle is reduced by 1 °. Step S205
In, adds the value or number 1 of the counter N in the imaging angle coordinate data Y _n for the current Y coordinate. That is, the angle is 1 °
to add. Then, the numerical value 1 is added to the counter N in step S206.

C. Smooth Continuous control determination step that is, the value of the counter N is determined whether reaches the numeric 3 in step S207, only resets the flag F _n in step S208 if the value of the counter N has reached a numerical value 3.

Then, step S106 in FIG. 4 → step
S107 → Step S101 → Step S102 → Step S1
03 → After step S104, again step S201 in FIG.
Return to Then, since the flag F ₀ is “0”, the process proceeds to step S209, and it is determined whether or not the smooth control flag F _n is “1”. That is, it is determined whether the smooth control is being continued.

[0110] Smooth control in Step S209 (F _n =
If “1”), the process proceeds to step S204, where coordinate data representing the shooting angle is calculated. The value of the counter N at this time is a numerical value 2. Then, from step S204
Every time the loop of step S206 is performed, the value of the counter N is incremented by one, and when N = 3, the smooth control flag F ₀ is reset. (Step S207 to Step S208)

[0111] d. Step for controlling the photographing angle variable speed at a constant speed that is, if it is judged that the N = 3 in step S207, proceeds from resets the smooth control flag F _n in step S208, to step S209 again In this case, the process proceeds to step S210 based on the determination result, and in step S210, the value of the counter N, that is, the value 3 is subtracted from the current coordinate data _Xn of the X coordinate. In other words, the angle is 3 °
Reduce. Further, in step S211, adds the value or numeric third counter N to coordinate data Y _n for the current Y coordinate. That is, the angle is added by 3 °.

Then, if the operation of the joystick is continued even after that, step S201 → step S201
Since the loop of S209 → Step S210 → Step S211 is repeatedly executed, the variable control of the photographing angle is continued at a variable speed corresponding to the operation amount of the joystick.

The above a. ~ D. As the value of the counter N increases from 1 to 3, the variable control speed of the shooting angle gradually increases.

(5) Shooting Angle Control Procedure-3 Next, a description will be given of a shooting angle control method that is sensitive to the joystick operation speed. That is, this is the control procedure shown in FIG. 7, and is a flowchart for explaining the control procedure-3 for changing the shooting angle. This procedure shown in steps S301 to S303 is an example in which the calculation work in step S105 shown in FIG. 4 is shown as a processing procedure that is sensitive to the operation speed of the joystick.

FIG. 7 shows an example in which the joystick is operated at a rapid speed in the operation direction "C". However, the processing operation may be performed in a similar procedure in other operation directions.

That is, in step S301, the absolute value S _{XS of the} amount of change between input signals (input data) read _cyclically is determined. For example, if the input signal at the read timing is S _X2 and the input signal at the read timing one cycle before is S _X1 , S _XS = l
S _X1 −S _X2 l (However, 1 represents an absolute value symbol.) Then, in step S302, it is determined whether or not the amount of change S _XS is greater than $ 8H. Then, a value larger than the value originally added to the shooting angle coordinate data X _n by 1 is added to the coordinate data X _n .

[0117] For example, in the control processing procedure -1 of the (3), when the operation amount of the joystick is a region, since the operation area is "C", the imaging angle coordinate data X _n = X ₁ +2, Y _n = Y ₁ +0, but if the operation speed of the joystick is fast, X
_It is calculated that _n = X ₁ +3 and Y _n = Y ₁ +0, and variably controls the shooting angle at a speed corresponding to the operation area of the joystick even if it is an area.

[0118]

As described above, according to the present invention, by using the joystick as operation / instruction means for changing the shooting angle of the television camera, it is possible to perform shooting angle control with good operation / controllability. it can. As a result, a user-friendly monitor device can be realized. Further, when used as an in-vehicle rear monitoring television camera, a monitor device with good visual recognition and high safety is realized.

[Brief description of the drawings]

FIGS. 1A and 1B are diagrams illustrating the basic principle of the present invention, in which FIG. 1A is a block diagram illustrating a configuration of a monitor device, and FIG. 1B is a diagram illustrating operation coordinates of a joystick.

FIGS. 2A and 2B are diagrams illustrating a configuration of an embodiment, in which FIG. 2A is a block diagram illustrating a configuration of a monitor device, and FIG. 2B is a model diagram illustrating a configuration of a joystick.

FIG. 3 is a diagram illustrating a data table for specifying an operation direction and an operation amount of a joystick.

FIG. 4 is a flowchart for explaining an operation of the embodiment, and is a flowchart for explaining a control procedure-1 of a photographing angle;

FIG. 5 is a data table for calculating coordinate data for determining a shooting angle of a television camera in the shooting angle control procedure-1 in FIG. 4, wherein (a) is a chart showing a data table corresponding to an operation amount area; (b) is a chart showing a data table corresponding to the operation amount area, and (c) is a chart showing a data table corresponding to the operation amount area.

FIG. 6 is a diagram for explaining the operation of the embodiment, and is a flowchart for explaining a photographing angle control procedure-2;

FIG. 7 is a flowchart for explaining the operation of the embodiment, and is a flowchart for explaining a control procedure-3 of a photographing angle;

FIG. 8 is a view for explaining an in-vehicle rear monitoring television camera;
(a) is a perspective view illustrating an operation mode, and (b) is a block diagram illustrating a configuration of a monitor device.

[Description of Signs] 1,1a, 1b TV camera (backward monitoring TV camera) 2,2a, 2b Monitor TV 3 Vehicle 4 Operation control unit 5 Shooting angle drive unit 6 Control unit 7,7a Joystick 8 Monitor device 9 Joystick operation knob 10 A / D (Analog to Digital) converter 11 Control microcomputer (Microcomputer System) 12 Motor drive unit 13 Horizontal / vertical angle drive unit (motor drive) 14 Potentiometer for X coordinate 15 Potentiometer for Y coordinate S _V video signal S _PC TV camera operation control signal S _PM monitor TV operation control signal S _R Reverse gear operation signal S _X Joystick X coordinate operation signal S _Y Joystick Y coordinate operation signal L Joystick operation amount θ Joystick operation direction V _X joystick X coordinate output voltage V _Y joystick Y coordinate output voltage D _D1 motor drive Data D _D2 motor drive signal

Claims (1)

(57) [Claims] 1. A monitor device for varying a shooting angle of a television camera at a speed corresponding to an operation amount of a joystick in a direction corresponding to an operation direction of a joystick, wherein the operation amount is quantized into at least two or more regions. When the operation speed of the joystick exceeds a predetermined speed, a variable amount corresponding to an operation amount one step higher than the variable speed of the imaging angle determined by the operation amount is obtained. A method for controlling a shooting angle of a television camera in a monitor device, wherein the speed is controlled.