• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.592-594
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• 2023

차량 탐지와 차량 추적 기술은 교통관리 시스템, 자율주행 자동차 시스템 및 이를 응용한 보안 감시 시스템, 군사 작전 및 안전 등 다양한 산업 분야에서 활용되고 있다. 본 논문에서는 차량 탐지는 YOLOv7 모델을, 차량 추적은 DeepSORT 알고리즘을 사용하여 도로의 차량들에 대해 탐지 및 추적을 순차적으로 진행하였다. 실험환경은 차량 탐지 데이터 셋(dataset)을 직접 라벨링(labeling) 하여 실험하였고, 차량 추적은 차량 탐지에서 학습해서 얻은 체크포인트(checkpoint) 모델을 가중치로 설정하여 실험을 진행하였다. 차량 탐지 실험결과는 validation 과 test 에서 높은 정확도를 확인할 수 있었고, 차량 추적은 Namsa 비디오 및 Seohaegyo 비디오에서도 차량 추적이 잘 되고 있음을 확인할 수 있었다.

• International Journal of Highway Engineering
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• v.10 no.3
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• pp.19-31
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• 2008

Video image processing systems(VIPS) offer numerous benefits to transportation models and applications, due to their ability to monitor traffic in real time. VIPS based on wide-area detection, i.e., multi-lane surveillance algorithm provide traffic parameters with single camera such as flow and velocity, as well as occupancy and density. However, most current commercial VIPS utilize a tripwire detection algorithm that examines image intensity changes in the detection regions to indicate vehicle presence and passage, i.e., they do not identify individual vehicles as unique targets. If VIPS are developed to track individual vehicles and thus trace vehicle trajectories, many existing transportation models will benefit from more detailed information of individual vehicles. Furthermore, additional information obtained from the vehicle trajectories will improve incident detection by identifying lane change maneuvers and acceleration/deceleration patterns. The objective of this research was to relate traffic safety to VIPS tracking and this paper has developed a computer vision system of monitoring individual vehicle trajectories based on image processing, and offer the detailed information, for example, volumes, speed, and occupancy rate as well as traffic information via tripwire image detectors. Also the developed system has been verified by comparing with commercial VIP detectors.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2016.06a
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• pp.361-363
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• 2016

현재 차량 내 운전자에게 편의성과 안전성을 제공하는 시스템이 활발히 개발 중이고 향후 ADAS(Advanced Driver Assistance System)와 스마트 자동차에서 영상 정보를 이용한 물체 추적과 분석은 매우 중요한 부분을 차지하고 있다. 영상에서 얻을 수 있는 정보 중 현재 도로의 이정표 정보는 중요한 분석 정보로 사용된다. 하지만 국내 도로표지판 검출 연구의 경우 유럽과 북미와 비교하여 연구 개발이 활발히 진행되고 있지 않다. 국내의 경우 도로 이정표에서 영문자뿐만 아니라 한글 문자 정보까지 포함하고 있어 검출이 쉽지 않다. 또한 비교적 밝고 잡음이 적은 검출하기 좋은 환경에서는 검출이 잘 되지만 명암이 뚜렷하지 않고 잡음이 많은 환경에서는 도로 이정표 문자 검출이 어렵다. 이에 본 논문에서는 CLAHE(Contrast-Limited Adaptive Histogram Equalization) 방법을 적용하여 영상이 어둡고 잡음이 많은 환경에서 국내 도로 이정표의 문자 정보를 얻는다. 실험 결과, 기존 방법에 비해 문자 영역 검출 성능이 향상되었다.

• Journal of the Korean Institute of Telematics and Electronics S
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• v.36S no.3
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• pp.89-96
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• 1999

본 논문에서는 빠른 수행 속도를 가지고 여러 대의 차량을 동시에 추적할 수 있는 다중 차량 추적 알고리즘을 제안한다. 이러한 작업은 연속 영상으로부터 움직이는 물체의 동작 정보를 구하는 동작 분할(motion segmentation)단계와 칼만 필터(Kalman filter)를 이용해서 물체의 위치를 예측하는 동작 예측(motion estimation)단계로 나누어진다. 제안된 알고리즘은 아핀 동작 모델(Affine motion model)을 적용하여 동작 정보를 근사화함으로써 두 개의 선형 칼만 필터를 사용하고, 칼만 필터에서 예측된 위치 정보를 동작 분할 과정에 사용하여 빠른 추적이 이루어지도록 하였다. 또한, 다중 물체 추적 시 중요한 데이터 연결 문제(data association problem)를 해결하기 위해서 패턴 인식 방법을 도입하였다. 제안된 알고리즘을 고속 도로 영상에 대해 적용했을 때, 빠르고 정확한 다중 차량 추적이 이루어짐을 실험 결과를 통해 보였다.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.43 no.5 s.311
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• pp.1-9
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• 2006

Because most applications of vision-based object tracking demonstrate satisfactory operations only under very constrained environments that have simplifying assumptions or specific visual attributes, these approaches can't track target objects for the highly variable, unstructured, and dynamic environments like a traffic scene. An adaptive fusion framework is essential that takes advantage of the richness of visual information such as color, appearance shape and so on, especially at cluttered and dynamically changing scenes with partial occlusion[1]. This paper develops a particle filter based adaptive fusion framework and improves the robustness and adaptation of this framework by adding a new distinctive visual attribute, an image feature descriptor using SIFT (Scale Invariant Feature Transform)[2] and adding an automatic teaming scheme of the SIFT feature library according to viewpoint, illumination, and background change. The proposed algorithm is applied to track various traffic objects like vehicles, pedestrians, and bikes in a driver assistance system as an important component of the Intelligent Transportation System.

• Journal of Cadastre & Land InformatiX
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• v.51 no.1
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• pp.53-65
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• 2021

C-ITS(Cooperative Intelligent Transport System) that pursues traffic safety and convenience uses various sensors to generate traffic information. Therefore, it is necessary to improve the sensor-related technology to increase the efficiency and reliability of the traffic information. Recently, the role of CCTV in collecting video information has become more important due to advances in AI(Artificial Intelligence) technology. In this study, we propose to identify and track dynamic objects(vehicles, people, etc.) in CCTV images, and to analyze and provide information about them in various environments. To this end, we conducted identification and tracking of dynamic objects using the Yolov4 and Deepsort algorithms, establishment of real-time multi-user support servers based on Kafka, defining transformation matrices between images and spatial coordinate systems, and map-based dynamic object visualization. In addition, a positional consistency evaluation was performed to confirm its usefulness. Through the proposed scheme, we confirmed that CCTVs can serve as important sensors to provide relevant information by analyzing road conditions in real time in terms of road infrastructure beyond a simple monitoring role.

• Journal of the Korea Society of Computer and Information
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• v.3 no.3
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• pp.1-5
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• 1998

In this paper, it was Proposed to extract road area automatically in general road guide map. Line tracing proposed in 〔1〕 was used basic extraction method, but by choosing starting pixel automatically iterative user interaction could be removed in this paper. this was possible by classifying and analysis color of each road. The usefulness of the proposed method was proved through experiments with various color printed maps.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.04b
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• pp.899-902
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• 2001

본 논문은 도로 상에서 움직이는 물체를 검출하고 웨이블릿 변환을 이용하여 검출된 물체를 추적하는 방법을 제안한다. 제안한 방법은 후보 영역 추출 단계와 물체 판별 단계 그리고 추적 단계로 이루어진다. 첫번째 단계에서는 연속된 두 프레임간의 차영상 분석 방법을 기반하여 움직이는 물체에 의해 발생한 영역과 그 이외의 다른 영역들을 검출한다. 두 번째 단계에서는 검출된 영역에 포함되어 있는 물체를 웨이블릿 변환 계수를 입력하는 신경망을 사용하여 판별한다. 그리고 판별된 물체의 위치 및 크기 정보와 웨이블릿 변환 계수를 이용하여 추적한다. 제안한 방법을 실험한 결과, 물체 추적률은 93%, 프레임당 처리 시간은 0.19ms 이다. 본 논문에서 제안한 방법은 실시간 교통 감시 시스템에 유용하게 적용될 수 있다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.25 no.1
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• pp.99-107
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• 2014

Abruptly occurred obstacles on highway threaten driving safety. Radar draws the attention to the collision avoidance system because it can be fully operational in all weather, and day and night condition. This paper presents the design, implementation and performance test results of pulsed Doppler radar system for detection and warning of road obstacles. The system is designed to consider highway environment and detection capability about various fixed and moving obstacles. The system consists of 4 subsystems, which include antenna unit, transmitter and receiver unit, radar signal & data processing unit, and controller & display unit. The core technologies include clutter map based change detection for fixed obstacles detection, Doppler estimation for velocity detection of moving targets, and azimuth angle estimation method using monopulse for lane estimation and tracking. The design performance of the developed radar system is verified through experiments using a fixed reference target and moving vehicles in test highway.

• Journal of Korean Society for Geospatial Information Science
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• v.10 no.3 s.21
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• pp.41-51
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• 2002

Recently, many studies extracting the geography information using digital aerial image have been implemented. But it is very difficult that automatically recognizing objects using edge detection method on the aerial image, and so that work have practiced manually or semi-automatically. Therefore, in this study, we have removed impedimental elements for recognition using the image which overlapped the significant information bands of brightness-sliced aerial images, then have developed the algorithm which can automatically recognize and extract road information and we will try to apply that method when we develope a system. For this, first of all, we have developed the 'template conformal-transformation moving operator' for automatically recognizing crosswalk area from crosswalk band image and the 'window normal search algorithm' which is able to track road area based on long-side length of crosswalk, so that we have proposed the method that can extract directly the road information from the aerial image.