JP2643455B2 - Automatic parking violation monitoring system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects a vehicle that stops in a parking prohibited area on a road, detects a vehicle that causes traffic congestion, and displays character information (number) on a number plate of the vehicle. The present invention relates to a parking violation vehicle automatic monitoring system that reads a land transportation office, a vehicle type, a use, and a serial number), stores gradation image data, specifies a parking violation vehicle, and issues a warning.

2. Description of the Related Art Violation detection for a parking / parking violation has been performed by a person going to the point, marking the stop position of the vehicle, and checking whether or not the vehicle has stopped at the same position again after a predetermined time has elapsed. .

According to such a method, it is impossible to detect until a person goes to that point or there is a report,
It was a cause of traffic jams and impeded vehicle traffic. The present invention, in order to solve the above problems, automatically read the character information on the number plate of the vehicle using a television camera or other recognition device, and based on the information to give a warning to the vehicle from the speech synthesis device, It is an object of the present invention to provide a parking violation vehicle automatic monitoring system that transmits character information and image data to a central device and performs a parking violation collective processing at the center based on the transmitted character information and image data.

Means for Solving the Problems In order to achieve the above object, the present invention connects a terminal device and a central device via a communication line or the like, detects a vehicle stopped in a parking violation area with the terminal device, and detects the vehicle. The character information on the license plate is automatically read, and the character information is transmitted to the central device together with the image data. The center can collectively process parking violations based on the transmitted information. (1) In order to detect that the vehicle has stopped in the parking / parking violation area and to automatically read the character information on the number plate by an image processing unit described later, an image of the parking / parking violation area is taken,
An imaging unit that outputs an image signal.

(2) An image processing unit that detects that the vehicle has entered the parking / stopping violation area from an image signal from the imaging unit, further detects the number plate portion of the vehicle, and reads the character information.

(3) A transmission control unit that transmits character information and image data sent from the image processing unit to the central device, and receives information from the central device and outputs the information to the voice synthesizing unit.

(4) A voice synthesizing unit that receives information sent from the central device via the transmission control unit and utters the information as voice, and the central device (1) transmits and receives data to and from the terminal device. Means (2) Means for storing character information and image data transmitted from the terminal device. (3) Measurement of the time when the same character information vehicle is stopped at the same point. Means for outputting to the voice synthesis unit is provided.

The imaging section of the terminal device always images the parking prohibited area. The image processing unit determines that the vehicle has entered from the image signal sent from the imaging unit and measures the position of the vehicle on the entire screen.

Based on this information, it is determined whether the size of the vehicle in the road width direction is within a predetermined ratio range with respect to the horizontal angle of view of the entire screen. Here, if the distance is not within the predetermined range, the image processing unit performs zoom control by remote control on the imaging unit.

The above operation is repeated so that the size of the vehicle in the road width direction in the screen is within a predetermined ratio range with respect to the entire screen.

Next, the image processing unit causes the imaging unit to emit strobe light, and gives a command to image the vehicle. The image processing unit detects a number plate position from an image signal from the imaging unit.

When the number plate position is detected, the size of the 4-digit serial number in the number plate portion in the horizontal screen, the serial number, and the vertical size of the land transportation office / vehicle type code portion are measured.

Here, it is determined whether the plate is a medium-sized plate or a large-sized plate based on the ratio between the serial number portion and the vertical size of the land transportation office / vehicle type code portion. Based on this result, it is determined whether or not the image is captured within a predetermined size range (each of a medium size and a large size) necessary for character recognition described later. If it is out of the predetermined range, zoom control is performed as in the case of vehicle detection, and the operation from vehicle imaging is repeated, and imaging is performed within the predetermined size range.

From the information that the plate position was detected to the predetermined size,
Each character is cut out, collated with a recognition dictionary, subjected to character recognition, converted into a character code, and transmitted to a transmission control unit.

The image processing unit periodically repeats the operations from imaging with flash lighting to character recognition, and sends out a character code to the transmission control unit.

The transmission control unit transmits the character information obtained by the image processing unit to the central device.

The central device stores the character information sent from the terminal device and compares it with the character information sent one after another to determine whether the vehicle is the same vehicle. When it is determined that the same vehicle has been stopped for more than a predetermined time, warning information including character information of the vehicle is created and transmitted to the terminal device in order to give a warning to the vehicle.

In the terminal device, the received warning information is sent to the voice synthesizer, and the voice synthesizer gives a warning to the vehicle by voice.

In the central device, even if a warning is given, if character information sent from the terminal device is collated and the vehicle is determined to be the same vehicle, a command is sent to the terminal device to transmit image data. The terminal device sends out image data according to an image data sending command from the central device. The central device stores the image data together with the character information for parking violation processing at a later date.

With the above operation, the violation detection for the parking and stopping violation has hitherto been performed by a person going to the point, marking the stop position of the vehicle, and checking whether or not the vehicle has stopped at the same position again after a predetermined time has elapsed. This has the effect of automatically detecting and monitoring what could not be done unattended.

Embodiment FIG. 1 shows the configuration of an embodiment of the present invention.

In FIG. 1, the parking violation automatic monitoring system includes a terminal device A connected to a communication line or the like and a central processing unit B. The terminal device A includes an imaging unit 1, an image processing unit 2, and a transmission control unit 3.
A central unit B for transmitting and receiving data to and from the terminal device A; a unit for storing character information and image data transmitted from the terminal device A; And a means for outputting to the voice synthesizing unit 4 of the terminal device A and the display unit 6 of the central device B when a predetermined time is exceeded.

The image pickup unit 1 uses the image processing unit 2 to always capture an image of the parked / prohibited section in order to detect that a vehicle has entered the parked / prohibited section and to automatically read characters on the number plate of the vehicle, and to generate an image signal. Output.

As shown in FIG. 2, the imaging unit 1 has a lens 1a having a remote control function of zoom, iris, and focus, a CCD camera 1b having an electronic shutter operation function, illumination 1c by a light emitting diode group, and a near-infrared filter. Consists of strobe lighting 1d. The imaging unit 1 operates in the following two modes. In the mode for detecting that the vehicle has entered the parking prohibited area, the entire parking prohibited area illuminated by the light 1c is always imaged, and the image capturing unit of the terminal device is always used to image the parking prohibited area. Further, in the mode for reading the number plate information, the image is zoomed up to a predetermined size by a remote command from the image processing unit 2, emits strobe light, and captures an image of the vehicle.

The image processing unit 2 calculates a difference image of the gradation in each cycle from the image signal sent from the imaging unit, and when it exceeds a predetermined threshold value, determines that the vehicle has entered,
Measure the position of the vehicle on the entire screen. Based on this information, it is determined whether the size of the vehicle in the road width direction is within a predetermined ratio range with respect to the horizontal angle of view of the entire screen. Here, if it is not within the predetermined range, the image processing unit 2 performs zoom control on the imaging unit 1 by remote control.

The above operation is repeated so that the size of the vehicle in the road width direction in the screen is within a predetermined ratio range with respect to the entire screen.

Next, the image processing unit 2 causes the imaging unit 1 to emit strobe light and gives a command to image the vehicle. The image processing unit 2 detects a number plate position from an image signal from the imaging unit 1.

When the number plate position is detected, the size of the 4-digit serial number in the number plate portion in the horizontal screen, the serial number, and the vertical size of the land transportation office / vehicle type code portion are measured.

Here, it is determined whether the plate is a medium-sized plate or a large-sized plate based on the ratio between the serial number portion and the vertical size of the land transportation office / vehicle type code portion. Based on this result, it is determined whether or not the image is captured within a predetermined size range (each of a medium size and a large size) necessary for character recognition described later. If it is out of the predetermined range, zoom control is performed as in the case of vehicle detection, and the operation from vehicle imaging is repeated, and imaging is performed within the predetermined size range.

From the information that the plate position was detected to the predetermined size,
Each character is cut out, collated with a recognition dictionary, subjected to character recognition, converted into a character code, and sent to the transmission control unit 3. The image processing unit 2 periodically repeats the operations from imaging with lighting of the strobe light to character recognition, and sends a character code to the transmission control unit 3.

The transmission control unit 3 transmits the character information obtained by the image processing unit 2 to the central device B. The central device B stores the character information sent from the terminal device A, and checks with the character information sent one after another to determine whether or not the vehicle is the same vehicle. When it is determined that the same vehicle has been stopped for more than a predetermined time, warning information including character information of the vehicle is created and transmitted to the terminal device A to give a warning to the vehicle.

In the terminal device A, the received warning information is sent to the voice synthesizing unit 4, and the voice synthesizing unit 4 gives a warning to the vehicle by voice through the loudspeaker 5. Even if a warning is given, central device B sends a command to terminal device A to send image data when character information sent from terminal device A is collated and the vehicle is determined to be the same vehicle. The terminal device A transmits image data according to the image data transmission command from the central device B.
The central device B stores the image data together with the character information for the parking violation processing at a later date.

The present invention, as is apparent from the above embodiment, from the image signal, to determine the presence or absence of vehicles entering the parking prohibited area,
Furthermore, the stored character information is collated with the character information of the entered vehicle license plate portion transmitted one after another to determine whether or not the vehicle is the same vehicle. By outputting a message indicating that the vehicle speed exceeds the threshold value, it is possible to control a vehicle that violates parking and stopping without providing a vehicle detection unit.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall outline of a parking violation automatic monitoring system according to an embodiment of the present invention, and FIG. 2 is a block diagram of an imaging section. A: Terminal device, B: Central device, 1 ... Imaging unit, 2 ...
... Image processing unit, 3 ... Transmission control unit, 4 ... Speech synthesis unit,
5 ... loudspeaker, 6 ... display unit.

Claims (1)

(57) [Claims] 1. A terminal device connected to a communication line and a central device. The terminal device captures an image of a vehicle stopped in a parking-prohibited area and transmits an image signal. The difference image of the gradation in each cycle is calculated, and when the difference exceeds a predetermined threshold value, it is determined that the vehicle has entered, and the position of the vehicle with respect to the entire screen is measured. Thus, the image processing unit has a transmission control unit that transmits character information and gradation image data from the image processing unit to the central device. Means for storing the character information and the gradation image data transmitted from the terminal device, and comparing the stored character information with the character information transmitted one after another to determine whether or not the vehicle is the same vehicle. Size Means for outputting when the stoppage time of the same vehicle exceeds a predetermined value.