JP2646754B2 - Automatic parking violation warning device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects a vehicle that is parked and stopped in a no-parking area on a road, detects a vehicle that causes traffic congestion, and displays character information (L) on a license plate of the vehicle. The present invention relates to a parking violation automatic warning device that reads a land transportation office, a vehicle type, a use, and a serial number), identifies 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 a 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,
This caused traffic jams and vehicle traffic.

The present invention solves the above-described problem by automatically reading character information on a license plate of a vehicle using a television camera or other recognition device, and issuing a warning to the vehicle from the speech synthesis device based on the information. It is intended to provide.

Means for Solving the Problems In order to achieve the above object, the present invention detects a vehicle parked in a parking violation area with a parking violation automatic warning device,
It is configured so that character information on the license plate of the vehicle can be automatically read, and the character information can be edited to give a warning of the vehicle. An image pickup unit that picks up an image of the parking / stopping violation area and outputs an image signal so that an image processing unit described below detects that the vehicle has stopped in the stoppage violation area and automatically reads the character information on the license plate.

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

(3) A control unit that collates the character information sent from the image processing unit, measures the stopping time of the same vehicle, edits the character information when the stop time exceeds a predetermined value, and outputs the edited character information to the speech synthesis unit.

(4) Upon receiving the information sent from the overall control unit,
It is composed of a speech synthesizer generated as speech.

Function The parking section is always imaged by the imaging section of the automatic parking violation warning device. 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 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 license plate position from an image signal from the imaging unit.

When the license plate position is detected, the size of the character string in the license plate portion is measured, and it is determined here whether the medium plate is a large plate.

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 outside the predetermined range,
As in the case of vehicle detection, zoom control is performed, and operations from vehicle image capture are repeated to capture images within a 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, character recognition is performed, converted into a character code, and transmitted to the overall control unit.

The image processing section periodically repeats the operations from imaging with lighting of the strobe light to character recognition, and sends out a character code to the overall control section.

The overall control unit compares the character information obtained by the image processing unit 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 period of time, in order to give a warning to the vehicle, the information is edited into warning information including character information of the vehicle, and output to the speech synthesizer. The voice synthesizer gives a warning to the vehicle by voice through a loudspeaker. By 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 giving a warning that something could not be done.

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

In FIG. 1, a parking violation automatic warning device A includes an imaging unit.
1, an image processing unit 2, an overall control unit 3, and a voice synthesizing unit 4.

The imaging unit 1 always takes an image of the parked / prohibited section by the image processing unit 2 to detect that a vehicle has entered the parked / prohibited section and to automatically read characters on the license plate of the vehicle. 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 of reading license plate information, the zoom-in is performed to a predetermined size by a remote command from the image processing unit 2, the strobe light is emitted, and the vehicle is imaged.

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, a command is issued to the image processing unit 2 to cause the imaging unit 1 to emit strobe light and to image the vehicle. The image processing unit 2 detects a license plate position from the image signal from the imaging unit 1.

When the license plate position is detected, the size of the 4-digit serial number in the license 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 overall control unit 3. The image processing unit 2 periodically repeats the operations from imaging with flash lighting to character recognition, and sends out a character code to the overall control unit 3.

The overall control unit 3 checks the character information obtained by the image processing unit 2 with the character information sent one after another, and determines whether the vehicle is the same vehicle. If it is determined that the same vehicle has been stopped for more than a predetermined time, to warn the vehicle,
The information is edited into warning information including the character information of the vehicle, and output to the speech synthesizer.

The voice synthesizer 4 gives a warning to the vehicle by voice through the loudspeaker 5.

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,
Further, the stored character information is transmitted one after another, and is compared with the character information of the entered vehicle license plate portion to determine whether the vehicle is the same vehicle, and the stop time of the same vehicle exceeds a predetermined value. By outputting warning information including the character information of the license plate of this vehicle to the offending vehicle without providing the vehicle detection means, thereby controlling the offending vehicle. It has the effect of being able to.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall outline of a parking violation automatic warning device according to an embodiment of the present invention, and FIG. 2 is a block diagram of an image pickup unit. A: parking violation automatic warning device, 1 ... imaging section, 2 ... image processing section, 3 ... overall control section, 4 ... voice synthesis section, 5 ...
…Loudspeaker.

Claims (1)

(57) [Claims] 1. An image of a vehicle parked in a parking prohibited area,
An image pickup unit for transmitting an image signal, and a difference image of gradations in each cycle from the image signal is calculated. Measure the position and based on this location,
An image processing unit for recognizing characters on the license plate of the vehicle by the imaging unit, a unit for storing the character information, and the character information transmitted one after another with respect to the stored character information. A control unit for collating and determining whether or not the vehicle is the same, editing and outputting warning information including the character information when the stopping time of the same vehicle exceeds a predetermined value, and outputting warning information to the vehicle by voice. A parking violation automatic warning device provided with a voice synthesizing unit.