JPH0690758B2 - Passing vehicle imaging device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a passing vehicle for photographing a vehicle passing through a road, such as photographing a vehicle passing unfairly without paying a toll at a toll gate on a toll road. The present invention relates to improvement of a photographing device.

[Conventional technology]

Film-type still cameras have been used to shoot vehicles that pass illegally without paying tolls at toll gates on toll roads, but it takes a lot of time and labor to shoot film phenomena and photographs. Was needed, and there was a problem in tracking the illicit person immediately.

In addition to the above toll booth,
It is often required for vehicles that run wildly, and for managing parking lots.

Here, a toll booth will be described as an example.

FIG. 6 is a block diagram of a passing vehicle photographing device that has been conventionally used at a tollgate on a toll road. In the figure, (1) is a road, (2) is a booth at the tollgate, and (3) is a collector ( 4) is a vehicle as a target vehicle, (5) is an operation switch (6) is a camera control signal from the operation switch (5), (7) is a position sensor, and the projector (7a), the light receiver (7b) and And a processing circuit (7c), (8) is a position detection signal from the position sensor (7), (9) is an AND circuit,
(10) is a shooting command signal from the AND circuit (9), (11)
Is a still camera (12) that uses 35mm film and is a strobe as a light source. Here, the collector (3) collects the charge in the booth (2), but when the vehicle (4) recognizes that the traffic is illegal, the operation switch (5) is pushed. Further, the position sensor (7) receives the light emitted from the traveling device (7a) by the light receiver (7b), and when the light from the light projector (7a) is blocked, the position of the light receiver (7b) is regulated. The presence of the vehicle is detected because it cannot receive light of more than the intensity, and the presence or absence of the vehicle is judged by the processing circuit (7c), and the vehicle is placed between the projector (7a) and the receiver (7b). A position detection signal (8) is output when the position is crossed. The position sensor (7) is installed in front of the still camera (11) at a predetermined position, for example, about 7 m. Further, the AND circuit (9) inputs the camera control signal (6) and the position detection signal (8) and takes a picture when the position detection signal (8) is input under the condition that the camera control signal (6) is on. A command signal (10) is output, and a shutter driving means (not shown) turns off the shutter of the still camera (11) to photograph the vehicle.

In such a configuration, the collector (3) collects the toll from the vehicle (4) corresponding to the alcoholic beverage of the vehicle and allows the vehicle (4) to travel. Since the collector (3) does not press the operation switch (5) with respect to a vehicle passing normally, the camera control signal (6) from the operation switch (5) is off, and the vehicle (4) detects the position sensor. Even when the position of (7) is reached and the position detection signal (8) is turned on, the shooting command signal is not output from the AND circuit (9). On the other hand, when the vehicle (4) recognizes that the vehicle is an unauthorized vehicle, the operation switch (5) is pressed and the camera control signal (6) is turned on. In this state, when the vehicle (4) reaches the position of the position sensor (7), the position detection signal (6) is output and the AND circuit (9) outputs the photographing command signal (10). The still camera (11) receives the photographing command signal (10), the shutter is released, the illumination light is emitted from the strobe (12), and the vehicle (4) is photographed. In this way, an illegally passing vehicle is photographed with a still camera and recorded as a record on film.

[Problems to be solved by the invention]

Conventionally, a passing vehicle photographing device photographs a vehicle with a still camera and leaves it on a film, but it takes time and labor for processing such as development and printing. In addition, there is a problem that it is not possible to record how the vehicle (4) passed and only the image of the vehicle (4) remains on one film.

The present invention has been made to solve such a problem, and uses a TV camera instead of a still camera to photograph the traffic situation of the vehicle at a low shutter speed under natural light, and also when the vehicle is at a predetermined photographing position. The object of the present invention is to realize a passing vehicle photographing device capable of clearly photographing / recording a passing vehicle by illuminating it with a strobe when it arrives, shooting with a high-speed shutter, and recording / recording each image.

[Means for Solving the Problems]

The passing vehicle photographing device according to the present invention includes a position sensor for detecting that the vehicle has reached a photographing point, a TV camera having a shutter as photographing means, a strobe as lighting means, and an image from the TV camera. Image memory for temporary storage of images and VTR (V
video tape recorder), a shutter controller for controlling the TV camera, a strobe as a lighting means,
It consists of an operation switch operated by a collector, the shutter controller controls the TV camera, and the collector presses the switch so that the TV camera shoots with a low speed shutter under natural light and the position sensor. When the vehicle is detected, the TV camera takes a picture with a high-speed shutter, for example, a shutter speed of about 1/1000 second. At this time, the strobe is synchronized with the shutter and illuminates the target vehicle. Also, when shooting under natural light, the shutter speed is switched by photometry of the light sensor to obtain an image with brightness almost equivalent to the result of shooting with strobe lighting, and it is possible to clearly shoot both natural light and strobe light. . It should be noted that a high-speed shutter image generated by strobe light can provide a clear image with little blurring for both the driver and the vehicle.

[Action]

According to the present invention, it is possible to capture a still image by stroboscopic illumination at the traffic condition and the shooting position of a passing vehicle. Since these images are recorded on the VTR, they can be reproduced immediately, and because the traffic situation is also recorded, it is easy to track the passing vehicles.

〔Example〕

FIG. 1 is a block diagram of an embodiment of the present invention, in which (13) is a TV camera, (14) is a shutter controller for determining the shutter speed and strobe synchronization of the TV camera (13), and (15) ) Is a shutter speed signal from the shutter controller (14), (16) is a strobe tuning signal from the shutter controller (14), (17) is a video signal from the TV camera (13), and (18) is an optical sensor. , (19) is a light receiving signal from the optical sensor, (21) is a video signal from the image processing circuit (20),
(22) is a VTR.

In the figure, (1) to (8) and (12) have the same functions as the same reference numerals in FIG. Here, the TV camera (13) is a frame transfer type CCD device (Charge Coupled Decoder) described in, for example, "Video Information", Volume 20, Volume 9, P41-46.
(vice) is an image sensor, and the shutter can be operated in addition to the normal movie shooting with the shutter open. The above CCD has an image area and a storage area.By photoelectrically converting the image in the image area and transferring the charges to the storage area at high speed, a still image can be taken by the electronic shutter operation, and the shutter speed is from the outside. The signal can be changed arbitrarily. The lens aperture value of the TV camera (13) is preset to a constant F value. Also, image processing circuit (20)
Stores the image from the TV camera (13) as image data, and is mainly composed of a semiconductor memory device.

Further, the optical sensor (18) is installed so as to detect the brightness within the field of view of the TV camera (13). The brighter the above field of view, the greater the output voltage of the light reception signal (19). It is supposed to be.

FIG. 2 is a diagram for explaining the details of the image processing circuit (20), in which (201) is a video signal (1) from a TV camera.
A) that converts 7) into a digital value corresponding to the magnitude of the voltage
A / D converter (Analog to Digital Converter), (202) is a sync signal separation circuit (203) for extracting a vertical sync signal and a horizontal sync signal from a video signal (17), and a sync signal separation circuit (2).
The video signal (17) is an address counter that outputs a memory address for each image according to the vertical synchronizing signal and the horizontal synchronizing signal from 02), and counts a built-in clock (not shown) with the vertical synchronizing signal and the horizontal synchronizing signal. An address counter that determines the memory address (206) by updating, (204) is an image memory that stores the output of the A / D converter (20), and (205) is a D / A converter (Digiatl to Analog Conver).
The image stored in the image memory (204) is again taken out as a video signal (21). The image processing circuit (20) is configured in this way, and the captured image is quantized by the A / D converter (201) and stored in the image memory (204) for one screen. At this time, the vertical synchronizing signal carried on the video signal (17) gives a break between one captured image, and the address counter (20
3) Reset. Also, the horizontal synchronizing signal is the scanning line 1
The address counter (203) is output to a book and the address counter (203) counts up a built-in clock to determine the horizontal coordinate of the image and determines the address of the image memory for each pixel, and the A / D The quantized image data output from the converter (201) is stored in the image memory (204). The image in the image memory (204) is taken out as a video signal (21) via the D / A converter (205).

FIG. 3 is a detailed configuration diagram of the shutter controller (14). (141) is a level determiner, (142) is a data selector, (143) is a pulse generator, and (144) is a first gate ( 145) is the second gate. Here, the level determiner (1
41) quantizes the magnitude of the voltage of the received light signal (19) and outputs it as, for example, 2-bit level determination outputs G1 and G2. First
The level determination output G1 of the above is the lower bit of the level determiner (141), and the second level determination output G2 is the upper bit of the level determiner (141). The data selector (142) outputs pulse outputs D1 to D4 from the pulse generator (143) according to the logic of the first level judgment output G1 and the second level judgment output G2.
Is selected, and the data output Q is taken out.

The pulse generator (143) gives a pulse for determining the shutter speed.
D0, the first pulse output D1, the second pulse output D2, the third pulse output D3, and the fourth pulse output D4 are generated. Here, the reference pulse output D0 gives a shutter speed at the time of photographing by stroboscopic illumination, and outputs a pulse having a pulse width of 1/1000 seconds, for example. On the other hand, the first pulse output D
The pulse widths of the first, second pulse output D2, third pulse output D3 and fourth pulse output D4 are, for example, D1 = 1/60 seconds, D2 = 1/12
It is set to a multiple series of 0 seconds, D3 = 1/250 seconds, D4 = 1/500 seconds, and when D1 is selected, the TV camera will operate at 1/60 seconds.

The first gate (144) outputs one reference pulse D0 after the position detection signal (8) is turned on, and outputs the data output Q from the shutter speed signal (15) when it is turned off. The second gate (145) outputs only one reference pulse D0 as the strobe tuning signal (16) after the position detection signal (8) is turned on. FIG. 4 is a truth table for explaining the operation of the shutter controller (14). As the light entering the optical sensor (18) becomes brighter,
It shows that a high shutter speed is output from the data output Q. The shutter speed value shown in FIG. 4 is merely an example. The operation of the shutter controller (14) will be described with reference to FIG. As is clear from Fig. 3,
When the position detection signal (8) is off, the optical sensor (4
A shutter speed signal (15) corresponding to the received light signal (19) detected by 9) is output. During this time, the strobe tuning signal (16) is turned off. On the other hand, when the position detection signal is turned on, the reference pulse D0 is output to the shutter speed signal (15), and the shutter speed becomes a predetermined value. At the same time, the strobe tuning signal (16) is output.

Again, the gist of the present invention will be described with reference to FIG. In the figure, when it is determined that the vehicle (4) is an illegally passing vehicle, the collector (3) turns on the operation switch (5). At this time, the camera control signal (6) turns on and the VTR (2
2) is activated, and the shutter controller (14) shoots at a shutter speed corresponding to the brightness in the field of view of the TV camera (13) detected by the optical sensor (18). This natural light-only photography continues until the vehicle (4) is detected by the position sensor (7).
The traffic condition of the VTR (2) is captured by the TV camera (13) and this video signal (17) passes through the image processing circuit (20).
It is recorded in 2). When the vehicle (4) reaches the position of the position sensor (7), the light from the light projector (7a) to the light receiver (7b) is blocked, and the position detection signal (8) is output from the processing circuit (7c). . The shutter controller (14) receives the position detection signal (8) and shoots one still image at a predetermined shutter speed. At this time, the strobe is also activated by the strobe tuning signal to illuminate the light emitting vehicle (4). This image is also VT via the image processing circuit (20).
Recorded in R (22). In this way, when shooting in natural light, the shutter speed is controlled according to the external brightness, and when using strobe lighting, the image is recorded with the high-speed shutter that is set beforehand so that the image does not shake. You can leave. As a result, since a clear image can be recorded including the traffic situation, the process at a later date can be smoothly performed. Although not shown, it is possible to automatically stop the VTR and the TV camera after capturing a still image.

FIG. 5 shows a block diagram of another embodiment of the present invention. In the figure, (30) is a data generator, which internally has a clock (31) and an installation point setting section (32).
In 1), time data such as year, month, day, hour, minute, second, etc. is generated. The installation location setting section (32) is a ROM (Read Only M
The name of the installation location is entered in advance in a memory element that is configured by emory) or the like. An image synthesizer (40) is an image synthesizer that superimposes the data from the data generator (30) as an image in the video signal (16) to form one screen. With this configuration, time data and place data can be inserted in the image, which is convenient for later processing.

In the embodiment, the position sensor (7) is used as a projector (7
The photoelectric type using a) and the light receiver (7b) has been described, but other types such as an ultrasonic type and a loop coil type are also available. Although the VTR is used as the recording medium, it may be an optical disc or the like. In the embodiment, the level determiner (141) is 2
Although the case of bit level output is shown, two levels are provided in order to keep the brightness of the high-speed shutter image by strobe lighting and the low-speed shutter image by natural light as constant as possible. May be. Further, in the embodiment, the image of the illegally passing vehicle at the toll gate is taken as an example, but it can also be used for the image of the runaway group, the image of the vehicle in the parking lot and the like.

〔The invention's effect〕

As described above, according to the present invention, a moving vehicle can be recorded as a moving image and a still image, and can be reproduced immediately because a VTR is used as a recording medium.

[Brief description of drawings]

FIG. 1 is a block diagram of a passing vehicle photographing apparatus showing an embodiment of the present invention, FIG. 2 is a detailed block diagram of an image processing circuit, FIG. 3 is a detailed diagram of a shutter controller, and FIG. 4 is a shutter controller. FIG. 5 is a block diagram of a passing vehicle photographing device showing another embodiment of the present invention, and FIG. 6 is a constitution diagram of a conventional passing vehicle photographing device. In the figure, (1) is a road, (2) is a booth, (3) is a collector, (4) is a vehicle, (5) is an operation switch, and (6).
Is a camera control signal, (7) is a position sensor, (8) is a position detection signal, (9) is an AND circuit, (10) is a shooting command signal, (11) is a still camera, (12) is a strobe, (1
3) is a TV camera (14) shutter controller, (15) is a shutter speed signal, (16) is a flash tuning signal, (17)
Is the video signal (18) is the optical sensor, (19) is the received light signal,
(20) is an image processing circuit, (21) is a video signal, (22) is VT
R, (30) is a data generator, (31) is a clock, (32) is an installation point setting unit, (40) is an image synthesizer, (141) is a level determiner, (142) is a pulse generator, ( 143) is a data selector, (144) is a first gate, (145) is a second gate, (201) is an A / D converter, (202) is a sync signal separation circuit, (203) is an address counter, (204) is an image memory, (205) is a D / A converter, and (206) is a memory address. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] 1. A traffic vehicle photographing apparatus for photographing a traffic situation of a vehicle, a TV camera capable of shutter operation, a strobe as an illumination means, an image processing circuit for temporarily storing an image from the TV camera, A recorder that records the video signal from the image processing circuit on a magnetic tape, etc. and a position that is installed at a predetermined point in front of the TV camera and that issues a position detection signal when the vehicle reaches the point. A sensor, an operation switch, an optical sensor for detecting the brightness in the field of view of the TV camera, and a shutter controller are provided, and when the operation switch is turned on, a signal from the optical sensor is output by the shutter controller. By measuring the brightness in the field of view of the TV camera, giving a shutter speed corresponding to the brightness to the TV camera for shooting, and turning on the recorder. The recording of the image taken by the TV camera to the recorder via the image processing circuit is started, and when the position sensor detects the vehicle, the position detection signal from the position sensor causes The shutter controller outputs a predetermined shutter speed and strobe synchronization signal, shoots the vehicle under strobe lighting at the predetermined shirt speed, and processes the shot images with the image processing. A passing vehicle photographing device characterized in that it is adapted to be recorded in a recorder via a circuit. 2. A traffic vehicle photographing apparatus for photographing a traffic situation of a vehicle, a TV camera capable of shutter operation, a strobe as an illumination means, a data generator for generating installation point and time data, and the TV. An image synthesizer that superimposes time and installation point data from the data generator on a video signal from a camera to form one image, an image processing circuit that temporarily stores the signal from the image synthesizer, and the image synthesizer Installed at a predetermined point in front of the TV camera and a recorder that records image data from a device on a magnetic tape, and a position sensor that issues a position detection signal when the vehicle reaches the point, An operation switch, an optical sensor for detecting the brightness within the field of view of the TV camera, and a shutter controller are provided, and when the operation switch is turned on, the shutter controller is Therefore, the brightness in the field of view of the TV camera is measured by the signal from the optical sensor, the shutter speed corresponding to the brightness is given to the TV camera to shoot, and the recorder is turned on to start the recording function. In addition, when the position sensor detects the vehicle, by the position detection signal from the position sensor,
The shutter controller outputs a predetermined shutter speed and a strobe synchronization signal, and the vehicle is photographed under strobe lighting at the predetermined shutter speed. An apparatus for photographing a passing vehicle characterized in that an image from a TV camera is recorded on the recorder by the recorder together with the installation point data.