RU2743455C1 - Parking violation recording system - Google Patents

Abstract

FIELD: traffic regulation.

SUBSTANCE: invention relates to the field of road transport traffic regulation. System for fixing violations of parking rules contains a PTZ camera, software and hardware for processing video recordings and a communication unit that provides information transfer. The system for fixing parking violations includes a configuration module that provides a visual indication of the zone in which the violation is recorded for each preset position of the PTZ camera. Moreover, the zone is configured directly on the video frame image received from the video camera.

EFFECT: timely adjustment of the parking violation fixing system.

1 cl, 2 dwg

Description

The invention relates to the field of traffic regulation of road transport, namely to methods for detecting violations of parking rules and can be used to automatically detect and register vehicles that violate parking rules.

A number of patents are known from the prior art for determining the violation of stopping and parking rules based on computer vision. Most of them use the principle of searching for the state registration plate (GRZ) on video frames of one section of the road, filmed at a time interval of at least a specified one. In the event that the same number is found in the same place after at least the specified time, a fine will be issued.

This raises the technical problem of determining the location of the detected vehicle and matching it with a section of the road where stopping is prohibited.

Complexes for video recording are mobile (on a patrol car) and stationary.

In the mobile complexes described in patents RU 107380 U8 and RU 111931 U1, the navigation system (GPS) of the patrol car is used to determine the location of the vehicle. However, the disadvantage of these systems is that the location of the vehicle in the frame does not coincide with the location of the patrol vehicle from which the shooting is being conducted, which leads to errors. To correct them, patent RU 126174 U1 proposes to supplement the complex with an electronic compass combined with a camera.

The distance to the license plate is determined by its size on the image, the direction - by the compass, all this together allows, based on the current coordinates of the patrol car, to determine the coordinates of the license plate and compare them with the coordinates of the parking prohibition zone. However, in addition, there remains the problem of uncertain GPS accuracy in building conditions and the need to patrol - this refers to the disadvantages of this system.

There are also systems with a fixed and fixed PTZ camera.

So, in the patent KR100805782, a system for fixing parking violations is described, including a stationary camera and a computing device with a motion detector, ensuring the location of a moving vehicle performing parking, and a PTZ camera aiming at the found vehicle, the video from which is used to recognize the license plate and further fixing the violation.

The closest analogue, taken as a prototype of the technical solution, is the system described in patent RU 136616 U1. In the prototype, the camera walks through the provided positions (presets) and shoots areas where stopping / parking is prohibited. In each position, a search for the license plate is performed on the frame. All license holders who have been recognized by the camera at least 2 times with a specified time interval are fined. Thus, for the system to work properly, it is required that at each position only the parking-inhibited area is included in the frame. This is a disadvantage of this system, since the system configuration becomes more complicated (a large number of preset positions are required, covering small areas of the field of view) and in some cases, full coverage of the required area is impossible, since either part of the prohibited parking area will not be covered, or they will fall into the frame areas where parking is permitted. If we want to cover a large section of the road with one camera, we must program its sequential guidance to different places so that other areas do not fall (for example, an oncoming lane or a "backup" where stopping can be allowed). In addition, this excludes the possibility of using this camera for other purposes (accounting for passing vehicles, fixing other traffic violations).

The objective of the invention is to obtain a system for fixing parking violations, which, in comparison with analogues, has greater versatility (the ability to combine with other video surveillance functions), ease of setup and reliability of results.

This task is achieved due to the fact that with the configured presets, it is possible to determine the zones in which the license plate should be located so that the car is considered an intruder. To implement this function, the system includes a software configuration unit, which, in addition to adjusting the preset positions (presets) of the camera, including the direction of the camera and magnification, but also allows you to specify in each the area of image points in which the GRZ should be located so that it is considered a potential intruder ... The zone is drawn if it is necessary to limit the area where stop violations are registered. Outside this zone, license plates are not taken into account when fixing these violations. This allows the use of "overview" views, in which the field of view is much larger than the area in which parking is prohibited, combining the fixation of stop violations with other purposes. It also ensures that fines are issued for stopping exactly in those places where it is prohibited, since the adjustment is carried out directly on the same images that will be included in the evidence base, and not indirectly through binding to the map of the camera position, the axis of the direction sensor, range estimation and directions to the number, comparison with the coordinates given on the map.

FIG. 1 shows a block diagram of a parking violation recording system.

FIG. 2 shows a block diagram of a computing module.

The system for fixing parking violations consists of one (or, possibly, several) PTZ cameras 1, possibly combined with an IR illuminator 2, ensuring the system's operability in poor lighting conditions, connected to the control module 3, including computing module 3.1, communication module 3.2 and power supply 3.3.

Optional (optional) system elements are shown in FIG. 1 dotted line.

Computing module 3.1 includes the following algorithmic blocks: video signal processing 3.1.1, block 3.1.2 search for license plate on the video frame and recognition of license plate, database of found license plate 3.1.3, block for detecting violations 3.1.4, setting block 3.1.5 and block at 3.1 .6 camera control.

Video camera 1 is designed to receive a video image and transmit it to a computing device. The lens of the camcorder has a variable focal length, which allows you to change the field of view of the camera in different preset positions. The camera is equipped with a rotary device that provides sequential movement of the camera through a sequence of preset positions. The camera is placed in a protective casing and placed so that a set of preset positions allows capturing the maximum space of interest for fixing parking violations and other video surveillance purposes that can be combined with the functions of the described system.

The camera can (preferably) be combined with an IR illuminator 2, which provides video recording in low light conditions.

The control controller 3 is housed in a protective case and placed so that it can be connected to a camera (or, possibly, several cameras).

Computing module 3.1 provides processing of the video signal, search for the license plate, detection of violations, control of the movement of the video camera according to preset positions, as well as setting the zones of operation of the algorithm for fixing violations.

Communication module 3.2 provides transmission of information about detected violations to the data processing center, where on the basis of it a decision is made to impose an administrative penalty, as well as for remote configuration of the system. Implemented on the basis of communication devices using GSM, Ethernet standards.

The power supply provides power for video cameras 1, IR illuminators 2, computing module 3.1 and communication module 3.2 from the industrial AC mains and, preferably, from the built-in battery in the event of a temporary power outage.

The video signal from the video camera enters the video signal processing unit 3.1.1, which ensures the conversion of the video camera signal into a digital form suitable for processing by the search and recognition algorithm of the license plate. In various versions of the system, this unit can be implemented as part of a video camera, and its functionality can be distributed between components implemented as part of a video camera and as part of a computing module.

The digital signal goes to the search and recognition unit of the license plate 3.1.2. If the license plate is found and successfully recognized, the time of its registration, the current preset position of the camera and the position on the frame are saved in the database 3.1.3. Also, information about the found number is sent to the block for fixing violations. 3.1.4. In this block, a search is made in the database 3.1.3 for information about the location of this number in this place of the frame, obtained in the same preset position of the frame earlier. If this number was recorded in the same place earlier than a specified number of minutes before the current time (the time period is configurable), a violation is issued and information about it, including the corresponding time-bound video frames, is transmitted using the communication module to the data processing center.

In this case, the violation detection block 3.1.4 compares the position of the license plate with the violation detection zone configured for the given preset camera position using the setting block 3.1.5. Violations are recorded only when the number enters the configured zone.

The system also includes an algorithmic setting block 3.1.5, which provides setting the preset positions of the camera and the order of their bypass, the time period after which the violation is recorded, and other parameters of the system.

Also, the setting block 3.1.5 provides visual adjustment of the zone for fixing parking violations for each preset camera position.

The camera control unit provides camera movement through the preset positions specified during system setup, as well as exposure and IR illuminator control.

The technical result from the use of the proposed technical solution is to simplify the setup of the system, increase the reliability of the results, the ability to combine the functions performed by the system with other video surveillance functions.

Claims (1)

The system for fixing parking violations, which contains a PTZ camera, software and hardware for processing video recordings and a communication unit that provides information transfer, characterized in that the system for fixing parking violations includes a setting module that provides a visual indication of the zone in which the violation is recorded for each preset position of the PTZ camera, and the zone is configured directly on the video frame image received from the video camera.

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