JPH01296502A - Automatically tracking lighting device - Google Patents

Abstract

PURPOSE:To perform high-speed and smooth tracking with good responsiveness by extracting a high-intensity point from the signal obtained from an image pickup means and driving a rotary bed so as to track this high-intensity point or a target point set for it. CONSTITUTION:When the light of a lighting device 11 is radiated to a mark 2 put on an object 1, the mark 2 strongly reflects the light, which is picked up by a TV camera 12 fitted to a lighting device 11 as a high-intensity point. This video signal VS is binary-processed in an image processor 100. The primary moment center value of the binary image is calculated in real time in every 1/60sec, for example, the signal corresponding to the shift quantity is sent to the motor-driven rotary bed 10 of the lighting device 11 through a drive section 4 based on the position data. The rotary bed 10 controls to automatically change the lighting direction of the lighting device 11 based on this signal and performs automatic tracking lighting for the moving object 1, the mark 2, or the target point apart from them by the preset distance.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention: (Industrial Application Field) The present invention relates to an automatic tracking illumination device that automatically follows a moving target object and illuminates only the vicinity thereof. Since the automatic tracking lighting device of the present invention can automatically track and illuminate moving objects, it can be used in wedding halls, banquet halls in hotels, theaters, etc. for lighting equipment for brides, grooms, actors, etc. It can be widely used as a spotlight).

(Prior Art) In conventional lighting equipment, a spotlight placed on an electric swivel table is operated by a human using a joystick or the like based on human judgment, and the position of a target object such as a person is illuminated. Each electric swivel table must be controlled remotely, which is difficult for a single operator to control if there are a large number of lighting devices. Further, even when the illumination angle of the lighting equipment is different from the viewing angle of the operator, the operation requires great effort and skill, which is inconvenient.

(Problem to be solved by the invention) In places such as wedding halls, theaters, banquet halls, etc., where there are many lighting fixtures and where they are frequently used, it is important to improve the operability of the lighting fixtures. It was a problem. For this reason, there has been a strong desire for a device that can reliably automatically track and illuminate a moving object in accordance with its movement, rather than having to control the electric swivel table manually.

This invention was made due to the above-mentioned circumstances.
The purpose of this invention is to completely automate the remote control of lighting equipment, which had previously been performed by humans, and to significantly reduce the amount of work and labor required by the operator. An object of the present invention is to provide an automatic tracking lighting device capable of extremely stable automatic tracking lighting.

Composition of the invention.

(Means for Solving the Problem) The present invention relates to an automatic tracking illumination device that automatically tracks a target point even if the target object moves and illuminates only the vicinity of the target object. includes a swivel base that can rotate in any direction, a directional illumination device attached to the swivel base, an imaging means that has a field of view that covers part or all of the illumination range by this illumination device, and A calculation control means is provided that processes the obtained signal to extract a high brightness point, and performs calculations to drive the swivel base so as to track this high brightness point or a set target point for this high brightness point. This is achieved by G-stringing.

(Function) A mark (such as a reflective tape that redirects the light in the coaxial direction) is attached to the object to be illuminated, and this mark is captured by a television camera from the same axis of the light, and the video signal from the camera is captured. Binarization processing is performed inside the image processing device.

As a result, a mark with high brightness always appears on the binary image, and the first moment on this binary image with high brightness - center value (
The so-called centroid) is calculated in real time, for example, every 1,760 seconds, and fed back to the electric drive unit of the lighting device so that the lighting always illuminates that position. The electric swivel base changes the lighting direction (panning,
Delting, etc.) is automatically controlled.

By accurately performing a series of controls as described above, the lighting fixture automatically follows the position of the moving mark and illuminates it. Furthermore, it is possible to improve the operability of the lighting equipment, which has been a major problem for operators who regularly operate many lighting equipment, and to perform lighting work efficiently.

(Example) An example of the present invention will be described below based on the drawings.

FIG. 1 shows a schematic configuration of the present invention, and a target object 1 such as a bride is marked with a mark 2. The mark 2 may be any material such as a reflective tape that reflects light in the coaxial direction when it is irradiated with light. The target object 1 is illuminated by a directional illumination device 11 mounted on an electric swivel base. It is integrated into the . The lighting device 11 is an electric swivel table 10
Directional illumination can be achieved in any direction by driving the . The video signal vS from the television camera 12 is subjected to image processing by an image processing device +00, which will be described later, and the captured screen is displayed on a monitor 3 such as a CRT. Further, the drive signal DS processed by the image processing device 100 drives the electric rotating table 10 through the drive unit 4 such as an amplifier, and moves the object pair 1 or the mark 2, or a target point that is a predetermined distance or away from them. The lighting position of the lighting device 11 is controlled so as to track the object.

When the mark 2 attached to the target object 1 is illuminated with light from the illumination device 11, the mark 2 strongly reflects the light and the illumination device 11
A television camera 12 attached to the camera captures the point with high brightness as an image, and this video signal v's is binarized inside the image processing device 100. Then, the first moment l-center value on the binary image is calculated in real time, for example, every 1/60 seconds, and based on the position data, the amount of movement of the illumination device 11 to the electric swivel table 10 is determined through the drive unit 4. Send the corresponding signal. Based on this signal, the electric swivel table 10 automatically controls the illumination direction (vanning, tilting, etc.) of the illumination device 11 to control the moving object 1 or mark 2 or a target point a predetermined distance away from them. Automatic tracking illumination is performed.

The details of the image processing device 100 are mainly shown in FIG.
is rotated horizontally by motor 13, and motor 14
It is designed to be rotated up and down. By combining these rotations, it is possible to illuminate any direction. The television camera 12 outputs two-dimensional address information f(x, y) in time series as a video signal vs, and has an imaging unit equipped with a lens system that covers part or all of the illumination range of the illumination device 11. There is. Video signal VS
is manually input to the binarization circuit 101, and is 1°' at a predetermined threshold value T.

It is converted into a binary signal P (x, y) of °0°'. Third
The figure shows the relationship between image information (shaded area) and X-Y addresses, and shows that the video signal vS at addresses X and Y is f(x, y). In addition, the binarization circuit 101 satisfies the threshold value T when f(x, y)≧T, P (x, y) = 1, and f(x, y)<T.
In this case, P (x, y) = O.

The synchronization separation circuit 102 inputs the video signal VS, separates it into a horizontal synchronization signal HD and a vertical synchronization signal VD, and inputs these signals to the timing generation circuit 103 . The timing generation circuit 103 is supplied with a clock signal CL from a clock generation circuit 104, and the clock signal CLK is outputted at a timing corresponding to the horizontal resolution of the image. The timing generation circuit 103 outputs clock signals C1 and K to be input to the calculation circuits 110 and 112 and the area word count circuit +11, and also outputs a signal R indicating the measurement range of the image information to the calculation circuits 110,1
12 and the area argument circuit 111. Furthermore, the timing generation circuit 103 generates a horizontal address signal X and inputs it to the accumulation circuit 110, and generates a vertical address signal Y and inputs it to the accumulation circuit 112, indicating the end of the measurement. The signal YR is generated and the arithmetic circuits 120 and 13
Manpower to 0. The timings of the vertical synchronization signal VD, the signal R indicating the measurement range, and the signal YR indicating the end of the open side are 4th.
It is as shown in the figure.

The accumulation circuits 110 and 112 have the same configuration, and the accumulation circuit 110 calculates ΣΣ×, and the accumulation circuit 112 calculates ΣΣY. In other words, the accumulator circuit +10 is composed of an ant circuit 113 and an adder circuit 114 as shown in FIG.
The adder circuit 114 becomes active only when both are "1" and the enable signal ES becomes "1'", and sequentially adds the address signals XAD at the timing of the clock signal CLK. The addition output ΣΣ× is cleared manually by ΣΣP(x, y) x
It shows x. Similarly, the output ΣΣY of the accumulator circuit 112 indicates ΣΣP (x, y) xy, and these added values ΣX and ΣY are input to the arithmetic circuits 120 and +30, respectively. In addition, the area word 4 number circuit 111 has a configuration as shown in FIG.
The counter 116 cleared by the binary signal P
(x, y) and the output CN of the AND circuit 115 based on the signal R indicating the autopsy range is counted using the clock signal CL, and the area S is output as the counted value. The counted area S is input to the calculation circuits 120 and +30.

Arithmetic circuits 120 and 130 output a signal YR indicating the end of measurement.
Waiting for human power, divide the accumulated results of X and Y coordinates (1st moment) by the area S (0th moment), calculate the center of gravity position of mark 2, and calculate ×(-ΣΣX/S) and Y
(-ΣΣY/S) is output to update the output value. Fourth
The figure shows this situation, and the vertical synchronization signal VD is manually operated (
Time t. , tl) by S.

ΣX and ΣY are initialized, and time T elapses. Between S, ΣX
.

ΣY] is measured and the measured value is updated during time T1.

The arithmetic circuits 121 and 131 are connected to the mark 2 as shown in FIG.
The differences ΔX and ΔY between the center of gravity position 21 and the target position 22 are calculated. Normally, the center of gravity position 21 of mark 2 and target position 2
There may be cases where it is desired to track the mark 2 at a predetermined distance from the mark 2, or to track the mark 2 at a predetermined distance. For example, even if there is a mark on the bride's head, the lighting effect will be greater if the light is centered on the chest area 50 cm below the mark. The differences ΔX and ΔY calculated by the calculation circuits 121 and 131 are input to the motor controllers 4X and 4Y, respectively, and the motor controllers 4X and 4Y drive the motors 13 and 14, respectively, to calculate the deviation between the target position 22 and the center of the screen. is fed back so that it becomes 0. Note that the target position of the illumination can be changed by adding an external setting element. In addition, the above-mentioned arithmetic circuit]20°121
, and 130 and 131, but it is also possible to implement software using a microcomputer or the like according to the flowchart shown in FIG.

Note that although a television camera is used as the imaging means in the above description, it is also possible to use a solid-state imaging device such as COD. Furthermore, the block configurations shown in FIGS. 5 and 6 are not limited to this.

Effect of the Invention 1 As described above, according to the automatic tracking illumination device of the present invention, an operator is not required, and smooth tracking with high speed and good response is possible. Additionally, even if multiple units are used, they can easily work together. Furthermore, since the center of gravity is calculated using a binary image as the target position, a stable and highly accurate measurement system can be achieved, and the calculation is suitable for hardware calculations.
Moreover, it is an economical real-time measurement.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a schematic configuration of the present invention, Fig. 2 is a block diagram showing a control system of the invention, Fig. 3 is a diagram showing the relationship between a video signal and an image, and Fig. 4 is a diagram of a timing generation circuit. Time chart 1-5 showing an example of the input/output relationship Figure 5 shows an example of an accumulating circuit. Figure 1 and Figure 6 are block diagrams showing an example of an area counting circuit. Figure 7 shows the position of the center of gravity of the mark. FIG. 8, which is a diagram showing the relationship with the target position, is a flowchart showing an example of calculation by software. 1...Target object, 2...Mark, 3...Monitor,
10...Electric swivel base, 11...Lighting device, 12...
・TV camera, 100... Image processing device, 101・
...Binarization circuit, 110°112...Accumulation circuit, l1
1...Area counting circuit, 12Q, 121°130.13
1... Arithmetic circuit. 5 Calm Figure 6

Claims (1)

[Claims] 1. A swivel base that can rotate in any direction, a directional illumination device attached to the swivel base, and an imaging means that has a field of view that covers part or all of the range illuminated by the illumination device. , arithmetic control for processing the signal obtained from the imaging means to extract a high-brightness point, and driving the swivel base by calculating to track this high-brightness point or a set target point for this high-brightness point; An automatic tracking lighting device characterized by comprising means. 2. The automatic tracking lighting device according to claim 1, wherein the imaging means is a television camera.