• 제어로봇시스템학회논문지
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• 제22권1호
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• pp.1-7
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• 2016

ADAS (Advanced Driver Assistance Systems) requires not only real-time robust lane detection, both straight and curved, but also predicting upcoming steering direction by detecting the curvature of lanes. In this paper, a curvature lane detection algorithm is proposed to enhance the accuracy and detection rate based on using inverse perspective images and Gaussian Mixture Model (GMM) to segment the lanes from the background under various illumination condition. To increase the speed and accuracy of the lane detection, this paper used template matching, RANSAC and proposed post processing method. Through experiments, it is validated that the proposed algorithm can detect both straight and curved lanes as well as predicting the upcoming direction with 92.95% of detection accuracy and 50fps speed.

• 산업공학
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• 제11권2호
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• pp.211-225
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• 1998

As mentioned in Part I all groupware products have been categorized into three areas which include cooperation/document management systems(CMS), collaborative writing systems(CWS), and decision-making/meeting system(DMS). This study deals with a comparative analysis of the last two areas, which is added to the first. It turns out that DMS has a higher market share than CWS. However. since effective collaboration requires the functions inherent to these two systems. they should be integrated somehow. The systems' functions that have been implemented in response to design issues have been described. Each group of the functions has been divided into three parts which consist of basic function, quasi-basic function. and others. Such a decision has been made according to the frequency rate of the functions provided in the products. While the basic functions in CWS include collaboraive writing beyond restriction of time and place, group awareness. version control. and others, in DMS realtime collaboration. brainstorming. presentation. various task support. policy formation. document management, multimedia, subgroup communication. topic commenter, categorizer, screen capture and various rile transfer. The basic functions are merged into the integrated functional model which was proposed in Part I. Since the model is so flexible that it can partially include the quasi-functions in addition to the hasic functions. a large number of products may stem from the modification of the functional model.

• 한국IT서비스학회지
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• 제13권3호
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• pp.343-357
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• 2014

As science and technology infiltrates every aspects of modern society in terms of economic and social growth and development, funding for research and development (R&D) is growing rapidly. Republic of Korea is not an exception in this trend and the R&D funding in Korea has been grown about 10% every year, recently. However, as the scope and size of funding grows exponentially, need for monitoring and managing these R&D projects becoming more and more imminent. Though different types of project management systems were developed by a variety of agencies and departments and used in monitoring and managing, these systems were developed as standalone silo type systems. These systems are not connected to each other while the same researchers may involved in different projects across agencies and department. Also, these management systems are not linked to the banking systems in which real transactions of funding occurs, such as cost reimbursement and financial audit of each R&D accounts. Historically, a few fraud and malappropriation cases were found and indicted. However, as the number of these incidents grows along with the growth of R&D funding, a large scale integration/linking of project management systems and banking systems. Realizing the importance of systems integration among agencies as well as with the banking systems, situational requirements analyses were conducted concerning the current state of R&D management system. As a results, a Real-time Case Management System (RCMS) was proposed as a solution to current problems. In this paper, the collected systems requirements were documents with analyses of the situation, the architecture of the integrated systems with more user-friendly technological alternatives. This large scale linkage requires interface standardization as well as modularization of interfaces. Proposed systems architecture is introduced here with technical details of Jex Framework used,, followed by resulting technical and economic performance of the Realtime Cashflow Management System (RCMS).

• 정보처리학회논문지:컴퓨터 및 통신 시스템
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• 제5권11호
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• pp.393-402
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• 2016

국방 L-V-C 시스템은 물리적 시간축에 따라 이벤트가 진행되는 Live 시스템, 컴퓨터 상에서 실제시간에 근접한 시간 사건에 의해 지배되는 Virtual 시스템 및 진행 시간에 관계없이 사건간 인과관계에만 의존적인 Constructive 시스템 등이 혼재된 분산형 복잡 시스템이다. 최근 이들 훈련 시스템들을 연동하여 최적의 훈련효과를 얻고자하는 LVC 연동 훈련체계에 대한 요구가 전세계적으로 증가하고 있다. 그러나, 기존에는 이론적이고 논리적인 접근 방식 혹은 부분적인 연동만이 제한적으로 제안되어 온 반면, 전 시스템적으로 LVC 훈련체계들을 연동시킬 수 있는 실제적인 기술은 국내외적으로 드문 상황이다. 이에 본 논문에서는 각 훈련시스템의 고유한 특성을 지원하는 분산시스템 연동 프로토콜들을 상위 개념에서 통합하고, 데이터와 이벤트에 대해 동일한 글로벌 시간과 상태를 유지하기 위한 데이터 중심 미들웨어 기반의 새로운 연동 아키텍쳐를 설계하고 구현한다. 또한, 구현된 연동 아키텍쳐를 기반으로 실제 L-V-C 시스템들을 모사한 시연 시스템들을 활용하여 그 성능을 검증하고 유효성을 증명한다.

• 제어로봇시스템학회논문지
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• 제14권10호
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• pp.991-997
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• 2008

A new RMRAC scheme far the PMSM current regulation is proposed in a synchronous frame, which is completely free from the parameter's uncertainty. A current regulator of PMSM is the inner most loop of electromechanical driving systems and plays a foundation role in the control hierarchy. When the PMSM runs in high speed, the cross-coupling terms must be compensated precisely for large system BW. In the proposed RMRAC, the input signal is composed of a calculated voltage defined by MRAC law and an output of the disturbance compensator. The gains of feed forward and feedback controller are estimated by the proposed modified gradient method, where the system disturbances are assumed as filtered current regulation errors. After the compensation of the system disturbance from error information, the corresponding voltage is fed forward to control input to compensate for real disturbances. The proposed method robustly compensates the system disturbance and cross-coupling terms. It also shows a good realtime performance due to the simplicity of control structure. Through real experiments, the efficiency of the proposed method is verified.

• 한국정보처리학회논문지
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• 제7권9호
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• pp.2783-2796
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• 2000

전자상거래 시스템에서 패키지 상품의 구매가 이루어지기 위해서는 패키지 상품을 구성하는 상품들이 구비되어 있어야 할뿐만 아니라 충분한 수량이 확보되어 있어야만 구매자의 요구가 있을 때 이를 실시간으로 처리할 수 있게 된다. 그리고 다수의 사용자가 동시에 가상쇼핑몰에 접근하여 패키지 상품을 구매하고자 할 때에도 상품에 대한 동시성 제어가 효율적으로 이루어져야만 한다. 본 논문에서는 고정형 패키지와 맞춤형 패키지상품 구매 시 상품선택과 구매가 효율적으로 이루어지도록 하기 위해서 모든 상품에 대한 실 수량과 판매가능 수량정보를 유지토록 함으로써 구매자의 요구를 실시간으로 처리할 수 있도록 하였고, 트랜잭션의 처리율이 향상되도록 하였다. 그리고 트랜잭션의 동시성 제어를 효율적으로 하기 위해서 잠금을 기반으로 한 동시성제어 알고리즘을 제시하였다.

• 제어로봇시스템학회논문지
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• 제16권11호
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• pp.1044-1052
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• 2010

In this paper, a new realtime algorithm called the RTPBTD-HPDAF (Recursive Temporal Profile Base Target Detection with Highest Probability Data Association Filter) is presented for tracking fast moving small targets with IIR (Imaging Infrared) sensor systems. Spatial filter algorithms are mainly used for target in IIR sensor system detection and tracking however they often generate high density clutter due to various shapes of cloud. The TPBTD (Temporal Profile Base Target Detection) algorithm based on the analysis of temporal behavior of individual pixels is known to have good performance for detection and tracking of fast moving target with suppressing clutter. However it is not suitable to detect stationary and abruptly maneuvering targets. Moreover its computational load may not be negligible. The PTPBTD-HPDAF algorithm proposed in this paper for real-time target detection and tracking is shown to be computationally cheap while it has benefit of tracking targets with abrupt maneuvers. The performance of the proposed RTPBTD-HPDAF algorithm is tested and compared with the spatial filter with HPDAF algorithm for run-time and track initiation at real IIR video.

• 제어로봇시스템학회논문지
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• 제18권10호
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• pp.912-920
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• 2012

In this paper, we propose a new and cost-effective RCP (Rapid Control Prototyping) system based on Matlab/Simulink and a DAQ (Data Acquisition) unit with the high speed USB communication interface. The proposed RCP system has a feature that a computer on which Simulink is running acts as a realtime controller and a DAQ unit performs data acquisition, transmission of the data to and from a computer, and the application of control data received from the computer. For its implementation, we develop 10 communication blocks each of which is constructed by using S-function. In order to increase the data communication speed and thus to reduce the sampling period of the overall control system, we propose to use a batch transfer strategy through the USB interface. The proposed RCP system has several advantages over existing methods such as good maintainability, portability due to the USB interface, low cost, and no necessity for C-code generation even though it can only be applied to control systems with moderate sampling rates. It is expected that the proposed RCP system can be useful in teaching control-related topics to undergraduate and graduate students.

• 한국통신학회논문지
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• 제30권4C호
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• pp.215-222
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• 2005

본 논문에서는 지문의 영상 품질, 특징점의 구조, 융선의 주파수와 방향성 등의 정보들을 이용하여 추출된 특징점들을 기반으로 임베디드 시스템에 적합한 지문인식 알고리즘을 제안하였다. 추출된 특징점들은 전처리 및 후처리 과정을 통해 참 특징점만을 선택함으로 정합과정의 신뢰도를 높였다. 정합과정에서는 지문 획득시 천이, 회전, 눌림 등으로 인한 오차를 고려함으로써 신뢰도를 개선하였으며, 인근 특징점만의 부분 정합을 통하여 전체정합을 위한 참조쌍을 택함으로써 수행시간을 단축하였다. 제안된 지문인식 알고리즘은 Arm920T .프로세서 환경하에서 구현되어 검증되었으며 실시간처리를 위한 다양한 방법이 적용되었다. 지문 등록부터 인식까지 처리시간은 0.541초로 실시간 임베디드 응용분야에 적용 가능함을 보여주었으며 이때 FRR(본인 거부율)과 FAR(타인 승인율)는 각각 0.079과 0.00005로 높은 신뢰도를 갖는다.

• 한국통신학회논문지
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• 제41권11호
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• pp.1507-1514
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• 2016

Full-image guided filter는 커널 윈도우 영역만 필터링에 반영되는 기존의 커널 윈도우 기반 가이드 필터와 달리 가중치 전파 도식과 양방향 모델이 적용되어 영상의 모든 픽셀이 필터링에 반영된다. 이로써 가이드 필터의 경계 보존과 평활화 등의 가이드 이미지 필터의 특성을 유지하면서도 계산 복잡도를 개선할 수 있다. 본 논문에서는 full-image guided filter의 더 빠른 처리가 필요한 스테레오 비전 및 각종 실시간 시스템 분야에 적용될 수 있도록 효율적인 하드웨어 구조를 제안하였다. 필터링 프로세스에서 발생하는 각종 데이터의 종속성 분석과 영상의 PSNR 분석, 데이터 빈도 분석 등을 통하여 적합한 하드웨어 구조를 제안하였다. 또한 양방향 모델이 적용된 가중치 연산 모듈의 휴식 구간이 최소화되도록 효율적인 스케줄링을 하였고 실시간 처리가 가능하게 하였다. 제안한 하드웨어 구조는 동부하이텍 0.11um 표준셀 라이브러리로 합성하였을 경우 최대 동작주파수 214MHz(384*288 영상: 965 fps)와 76K(내부 메모리 제외) 게이트의 하드웨어 복잡도를 나타냈다.