• Title/Summary/Keyword: part-matching

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Estimation of air pollutant emissions from heavy industry sector in North Korea (북한의 중공업 부문 대기오염물질 배출량 추정)

  • Lee, Young Won;Kim, Yong Pyo;Yeo, Min Ju
    • Particle and aerosol research
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    • v.17 no.4
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    • pp.133-148
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    • 2021
  • This study aims to estimate the amount of air pollutants emitted from heavy industry facilities in North Korea. To compare the emission in 2017 from the heavy industry sector in North Korea with South Korea, the heavy industry sector was classified with the South Korean classification (Matching Heavy Industry sector) and air pollutant emissions by Matching Heavy Industry sector in North Korea were estimated. The CO, NOx and SOx emissions of Matching Heavy Industry sector in North Korea are 22%, 73%, and 31% of the emission in South Korea, respectively. The air pollutant emissions in the Matching Heavy Industry sector in North Korea for CO, NOx and SOx were 0.6%, 124%, and 24% of the total air pollutant emission in North Korea estimated from EDGAR, respectively. As for the distribution of emissions by administrative district of the Matching Heavy Industry sector in North Korea, NOx was concentrated in the western part of North Korea, and CO and SOx emissions were concentrated in Hamgyong-bukto.

Stereo Matching Algorithm Based on Fast Guided Image Filtering for 3-Dimensional Video Service (3차원 비디오 서비스를 위한 고속 유도 영상 필터링 기반 스테레오 매칭 알고리즘)

  • Hong, Gwang-Soo;Kim, Byung-Gyu
    • Journal of Digital Contents Society
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    • v.17 no.6
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    • pp.523-529
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    • 2016
  • Stereo matching algorithm is an essential part in computer vision and photography. Accuracy and computational complexity are challenges of stereo matching algorithm. Much research has been devoted to stereo matching based on cost volume filtering of matching costs. Local stereo matching based guided image filtering (GIF) has a computational complexity of O(N), but is still not enough to provide real-time 3-dimensional (3-D) video services. The proposed algorithm concentrates reduction of computational complexity using the concept of fast guided image filter, which increase the speed up to $O(N/\small{s}^2)$ with a sub-sampling ratio $\small{s}$. Experimental results indicated that the proposed algorithm achieves effective local stereo matching as well as a fast execution time for 3-D video service.

2D Planar Object Tracking using Improved Chamfer Matching Likelihood (개선된 챔퍼매칭 우도기반 2차원 평면 객체 추적)

  • Oh, Chi-Min;Jeong, Mun-Ho;You, Bum-Jae;Lee, Chil-Woo
    • The KIPS Transactions:PartB
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    • v.17B no.1
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    • pp.37-46
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    • 2010
  • In this paper we have presented a two dimensional model based tracking system using improved chamfer matching. Conventional chamfer matching could not calculate similarity well between the object and image when there is very cluttered background. Then we have improved chamfer matching to calculate similarity well even in very cluttered background with edge and corner feature points. Improved chamfer matching is used as likelihood function of particle filter which tracks the geometric object. Geometric model which uses edge and corner feature points, is a discriminant descriptor in color changes. Particle Filter is more non-linear tracking system than Kalman Filter. Then the presented method uses geometric model, particle filter and improved chamfer matching for tracking object in complex environment. In experimental result, the robustness of our system is proved by comparing other methods.

Motion Direction Oriented Fast Block Matching Algorithm (움직임 방향 지향적인 고속 블록정합 알고리즘)

  • Oh, Jeong-Su
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.15 no.9
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    • pp.2007-2012
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    • 2011
  • To reduce huge computation in the block matching, this paper proposes a fast block matching algorithm which limits search points in the search area. On the basis of two facts that most motion vectors are located in central part of search area and matching error is monotonic decreasing toward the best similar block, the proposed algorithm moves a matching pattern between steps by the one pixel, predicts the motion direction for the best similar block from similar blocks decided in previous steps, and limits movements of search points to ${\pm}45^{\circ}C$ on it. As a result, it could remove the needless search points and reduce the block matching computation. In comparison with the conventional similar algorithms, the proposed algorithm caused the trivial image degradation in images with fast motion but kept the equivalent image quality in images with normal motion, and it, meanwhile, reduced from about 20% to over 67% of the their block matching computation.

Automated infographic recommendation system based on machine learning (기계학습 기반의 인포그래픽 자동 추천 시스템)

  • Kim, Hyeong-Gyun;Lee, Sang-hee
    • Journal of Digital Convergence
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    • v.19 no.11
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    • pp.17-22
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    • 2021
  • In this paper, a machine learning-based automatic infographic recommendation system is proposed to improve the existing infographic production method. This system consists of a part that machine learning multiple infographic images and a part that automatically recommends infographics with artificial intelligence only by inputting basic data from the user. The recommended infographics are provided in the form of a library, and additional data can be input by drag & drop method. In addition, the infographic image is designed to be dynamically adjusted according to the size of the input data. As a result of analyzing the machine learning-based automatic infographic recommendation process, the matching success rate for layout and keyword was very high, and the matching success rate for type was rather low. In the future, a study to improve the matching success rate for the image type for each part of the infographic will be needed.

The study of data transfer method non-matching meshes interface using common-refinement method for fluid-structure interface (유체-구조 연성 해석을 위한 common-refinement 기반 불일치 격자 경계면에서의 정보 전달 기법 연구)

  • Han, Sangho;Kim, Donghyun;Lee, Changsoo;Kim, Chongam
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.42 no.3
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    • pp.191-198
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    • 2014
  • During multi-physics or multi-phase simulations accompanying fluid- structure- thermal interaction, data transfer problems always arise along non- matching interfaces caused by different computational meshes for each physical domain. Common- refinement scheme, among many available methods, is attractive since it is known to yield conservative and accurate data transfer for non- matching interface cases. This is particularly important in simulating compressible unsteady fluid- structure- thermal interaction inside solid propellant rockets, where grid size along solid- fluid interfaces is substantially different. From this perspective, we examine performances of common- refinement- based data transfer scheme between structured quadrilateral (structure part) and unstructured triangular (fluid part) meshes by comparing computed results with other data transfer methods.

Design of a Broadband Sleeve Monopole Antenna by Using Matching Characteristics of the Sleeve (슬리브 정합 특성을 이용한 광대역 슬리브 모노폴 안테나 설계)

  • Ryu, Han-Cheol
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.10
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    • pp.6839-6845
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    • 2015
  • The optimization design method for the broadband operation of the sleeve monopole was proposed to unify the multiple antennas essential to the multi-functional broadband wireless communication systems into one antenna. The structure of the sleeve part was optimized to enhance the impedance matching characteristics based on the theoretical analysis that sleeve part can works as the open stub. The thick monopole was used for the broadband operation. The radius of the sleeve and the permittivity of the dielectric inside the sleeve was optimized to enhance the impedance matching characteristics for the broadband operation. The optimized sleeve monopole having thick monopole shows broadband characteristics over 3:1 bandwidth, from 0.8 to 2.43 GHz, which is suitable for the commercial wireless communication system. The proposed broadband sleeve monopole can reduce multiple antennas essential to the multi-functional broadband systems to one antenna.

Framework Architecture of Intrusion Detection System against Denial-of-Service Attack, especially for Web Server System (웹서버를 위한, 서비스 거부 공격에 강한 침입탐지시스템 구성)

  • Kim, Yoon-Jeong
    • Convergence Security Journal
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    • v.8 no.3
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    • pp.1-8
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    • 2008
  • The pattern matching part of Intrusion Detection System based on misuse-detection mechanism needs much processing time and resources, and it has become a bottleneck in system performance. Moreover, it derives denial-of-service attack. In this paper, we propose (1) framework architecture that is strong against denial-of-service attack and (2) efficient pattern matching method especially for web server system. By using both of these 2 methods, we can maintain web server system efficiently secure against attacks including denial-of-service.

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Design Method for the Optimized Acoustic Matching Layers of UT Probes (비파괴 검사용 초음파 탐촉자에서의 정합층 최적 설계법)

  • Park, Chi-seung;Kim, Seon-Jin
    • Korean Journal of Materials Research
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    • v.13 no.10
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    • pp.658-662
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    • 2003
  • In this study, we have tried to find the optimized design variables of the matching layer which is important part of thickness mode ultrasonic transducer and finally reach the conclusion that the electrical property of piezo-element must be under consideration when the optimized acoustic impedance is estimated. Proper expression of the effective impedance of front load at free resonant frequency(: $Z_{f}$ $^{(0)}$ /) has been induced by introducing the principle of binomial multilayer transformer and gradient based numerical method is utilized to find the most acceptable value of $Z_{ f}$/$^{(0)}$ . Optimized point of acoustic impedance can be calculated directly from $Z_{f}$ $^{(0)}$ using some simple formula which we propose. We also verify our result by both numerical and experimental method and get a good enhancement especially it concern to the bandwidth of ultrasonic transducer.

Comparison Fast-Block Matching Motion Estimation Algorithm for Adaptive Search Range (탐색 범위를 적용한 비교 루틴 고속 블록 움직임 추정방법 알고리듬)

  • 임유찬;밍경육;정정화
    • Proceedings of the IEEK Conference
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    • 2002.06d
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    • pp.295-298
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    • 2002
  • This paper presents a fast block-matching algorithm to improve the conventional Three-Step Search (TSS) based method. The proposed Comparison Fast Block Matching Algorithm (CFBMA) begins with DAB for adaptive search range to choose searching method, and searches a part of search window that has high possibility of motion vector like other partial search algorithms. The CFBMA also considers the opposite direction to reduce local minimum, which is ignored in almost conventional based partial search algorithms. CFBMA uses the summation half-stop technique to reduce the computational load. Experimental results show that the proposed algorithm achieves the high computational complexity compression effect and very close or better image quality compared with TSS, SES, NTSS based partial search algorithms.

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