• Title/Summary/Keyword: Vehicle Plate Recognition

Search Result 144, Processing Time 0.022 seconds

Vehicle License Plate Text Recognition Algorithm Using Object Detection and Handwritten Hangul Recognition Algorithm (객체 검출과 한글 손글씨 인식 알고리즘을 이용한 차량 번호판 문자 추출 알고리즘)

  • Na, Min Won;Choi, Ha Na;Park, Yun Young
    • Journal of Information Technology Services
    • /
    • v.20 no.6
    • /
    • pp.97-105
    • /
    • 2021
  • Recently, with the development of IT technology, unmanned systems are being introduced in many industrial fields, and one of the most important factors for introducing unmanned systems in the automobile field is vehicle licence plate recognition(VLPR). The existing VLPR algorithms are configured to use image processing for a specific type of license plate to divide individual areas of a character within the plate to recognize each character. However, as the number of Korean vehicle license plates increases, the law is amended, there are old-fashioned license plates, new license plates, and different types of plates are used for each type of vehicle. Therefore, it is necessary to update the VLPR system every time, which incurs costs. In this paper, we use an object detection algorithm to detect character regardless of the format of the vehicle license plate, and apply a handwritten Hangul recognition(HHR) algorithm to enhance the recognition accuracy of a single Hangul character, which is called a Hangul unit. Since Hangul unit is recognized by combining initial consonant, medial vowel and final consonant, so it is possible to use other Hangul units in addition to the 40 Hangul units used for the Korean vehicle license plate.

Real-time Vehicle License Plate Recognition Method using Vehicle-loaded Camera (차량 탑재용 카메라를 이용한 실시간 차량 번호판 인식 기법)

  • Chang, Jae-Khun
    • Journal of Internet Computing and Services
    • /
    • v.6 no.3
    • /
    • pp.147-158
    • /
    • 2005
  • Day after day the information of vehicle under the complex traffic environments is greatly required not only for traffic flow but also for vehicle disclosure of traffic violation, Vehicle information can be obtained from a recognition of vehicle license plate, This paper proposes a new vehicle plate recognition mechanism that uses moving style vehicle-loaded camera, The method is a real-time processing system using multi-step image processing and recognition process that recognizes general vehicles and special purpose vehicles, The experimental results of real environmental image and recognition using the proposed method are shown.

  • PDF

Twowheeled Motor Vehicle License Plate Recognition Algorithm using CPU based Deep Learning Convolutional Neural Network (CPU 기반의 딥러닝 컨볼루션 신경망을 이용한 이륜 차량 번호판 인식 알고리즘)

  • Kim Jinho
    • Journal of Korea Society of Digital Industry and Information Management
    • /
    • v.19 no.4
    • /
    • pp.127-136
    • /
    • 2023
  • Many research results on the traffic enforcement of illegal driving of twowheeled motor vehicles using license plate recognition are introduced. Deep learning convolutional neural networks can be used for character and word recognition of license plates because of better generalization capability compared to traditional Backpropagation neural networks. In the plates of twowheeled motor vehicles, the interdependent government and city words are included. If we implement the mutually independent word recognizers using error correction rules for two word recognition results, efficient license plate recognition results can be derived. The CPU based convolutional neural network without library under real time processing has an advantage of low cost real application compared to GPU based convolutional neural network with library. In this paper twowheeled motor vehicle license plate recognition algorithm is introduced using CPU based deep-learning convolutional neural network. The experimental results show that the proposed plate recognizer has 96.2% success rate for outdoor twowheeled motor vehicle images in real time.

Vehicle License Plate Recognition Method Robuse to Changes in Lighting Conditions (빛의 변화에 강건한 차량번호판 인식방법)

  • Nam, Kee-Hwan;Bae, Cheol-Soo
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.9 no.1
    • /
    • pp.160-164
    • /
    • 2005
  • The process of recognizing a vehicle involves detection of the vehicle, recognition of the vehicle model, and identification of the vehicle. The process of vehicle identification involves identification of the vehicle itself, such as by recognition of the license plate on the vehicle. In this paper the method involves the use of a beam splitter to divide incident rays into two directions, a transmitted beam and a reflected beam of different light intensities, and synthesizing two captured images using CCD devices from each beam, thus producing fluctuation-free images of a wide dynamic range even when the subject is moving. A prototype license plate recognition system was also developed using the experimental sensing device. The system achieved a 98.7% recognition rate on 466 images of moving vehicles, which demonstrates its effectiveness as a license plate recognition system.

A Study on improving the performance of License Plate Recognition (자동차 번호판 인식 성능 향상에 관한 연구)

  • Eom, Gi-Yeol
    • Proceedings of the Korean Institute of Intelligent Systems Conference
    • /
    • 2006.11a
    • /
    • pp.203-207
    • /
    • 2006
  • Nowadays, Cars are continuing to grow at an alarming rate but they also cause many problems such as traffic accident, pollutions and so on. One of the most effective methods that prevent traffic accidents is the use of traffic monitoring systems, which are already widely used in many countries. The monitoring system is beginning to be used in domestic recently. An intelligent monitoring system generates photo images of cars as well as identifies cars by recognizing their plates. That is, the system automatically recognizes characters of vehicle plates. An automatic vehicle plate recognition consists of two main module: a vehicle plate locating module and a vehicle plate number identification module. We study for a vehicle plate number identification module in this paper. We use image preprocessing, feature extraction, multi-layer neural networks for recognizing characters of vehicle plates and we present a feature-comparison method for improving the performance of vehicle plate number identification module. In the experiment on identifying vehicle plate number, 300 images taken from various scenes were used. Of which, 8 images have been failed to identify vehicle plate number and the overall rate of success for our vehicle plate recognition algorithm is 98%.

  • PDF

Implementation of Vehicle Plate Recognition Using Depth Camera

  • Choi, Eun-seok;Kwon, Soon-kak
    • Journal of Multimedia Information System
    • /
    • v.6 no.3
    • /
    • pp.119-124
    • /
    • 2019
  • In this paper, a method of detecting vehicle plates through depth pictures is proposed. A vehicle plate can be recognized by detecting the plane areas. First, plane factors of each square block are calculated. After that, the same plane areas are grouped by comparing the neighboring blocks to whether they are similar planes. Width and height for the detected plane area are obtained. If the height and width are matched to an actual vehicle plate, the area is recognized as a vehicle plate. Simulations results show that the recognition rates for the proposed method are about 87.8%.

Vehicle License Plate Recognition System Using the Cautious Classifier and the Weighted Instance Method (신중한 분류기와 학습 예제 가중치 조정을 이용한 차량번호판인식시스템의 인식성능 향상 방안)

  • Baik, Nam Cheol;Lee, Sang Hyup;Ryu, Kwang Ryul
    • KSCE Journal of Civil and Environmental Engineering Research
    • /
    • v.26 no.4D
    • /
    • pp.549-551
    • /
    • 2006
  • Vehicle License Plate Recognition System reads information from vehicles license plate using image detection devices. Of many applications provided by Vehicle License Plate Recognition System, some, such as speed enforcing system, can be problematic when the system incorrectly scans letters or numbers from a vehicle's license plate. Using Cautious Classifier avoids such problems by discarding the scanned information when the confidence level is doubted to be low. This study develops the License Plate Recognition System using Cautious Classifier and investigates effectiveness of applying the Weighted Instance Method to improve the performance of Cautious Classifier.

A Study on Improving License Plate Recognition Performance Using Super-Resolution Techniques

  • Kyeongseok JANG;Kwangchul SON
    • Korean Journal of Artificial Intelligence
    • /
    • v.12 no.3
    • /
    • pp.1-7
    • /
    • 2024
  • In this paper, we propose an innovative super-resolution technique to address the issue of reduced accuracy in license plate recognition caused by low-resolution images. Conventional vehicle license plate recognition systems have relied on images obtained from fixed surveillance cameras for traffic detection to perform vehicle detection, tracking, and license plate recognition. However, during this process, image quality degradation occurred due to the physical distance between the camera and the vehicle, vehicle movement, and external environmental factors such as weather and lighting conditions. In particular, the acquisition of low-resolution images due to camera performance limitations has been a major cause of significantly reduced accuracy in license plate recognition. To solve this problem, we propose a Single Image Super-Resolution (SISR) model with a parallel structure that combines Multi-Scale and Attention Mechanism. This model is capable of effectively extracting features at various scales and focusing on important areas. Specifically, it generates feature maps of various sizes through a multi-branch structure and emphasizes the key features of license plates using an Attention Mechanism. Experimental results show that the proposed model demonstrates significantly improved recognition accuracy compared to existing vehicle license plate super-resolution methods using Bicubic Interpolation.

Temporal matching prior network for vehicle license plate detection and recognition in videos

  • Yoo, Seok Bong;Han, Mikyong
    • ETRI Journal
    • /
    • v.42 no.3
    • /
    • pp.411-419
    • /
    • 2020
  • In real-world intelligent transportation systems, accuracy in vehicle license plate detection and recognition is considered quite critical. Many algorithms have been proposed for still images, but their accuracy on actual videos is not satisfactory. This stems from several problematic conditions in videos, such as vehicle motion blur, variety in viewpoints, outliers, and the lack of publicly available video datasets. In this study, we focus on these challenges and propose a license plate detection and recognition scheme for videos based on a temporal matching prior network. Specifically, to improve the robustness of detection and recognition accuracy in the presence of motion blur and outliers, forward and bidirectional matching priors between consecutive frames are properly combined with layer structures specifically designed for plate detection. We also built our own video dataset for the deep training of the proposed network. During network training, we perform data augmentation based on image rotation to increase robustness regarding the various viewpoints in videos.

Vehicle License Plate Recognition System on PDA for Illegal Parking Car Regulation (주정차 단속을 위한 PDA 기반의 자동차번호판 인식 시스템)

  • Yoon Hee-Joo;Cho Hoon;Koo Kyung-Mo;Cha Eui-Young
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2006.05a
    • /
    • pp.792-795
    • /
    • 2006
  • In this paper, we propose a method of vehicle license plate recognition on PDA for illegal parking car regulation. we classified three kinds of vehicle license plates being used down to date since the introduction of each vehicle license Plate using features of each one. And we recognized vehicle license plates segmentation the AreaName, the AreaCode, the TypeCharacter and the Numbers. A 88.7% recognition accuracy was obtained through the experiment of the proposed vehicle license plate recognition system using the obtained images of PDA.

  • PDF