Search Results:　 1-20 of 38

  • 1

    Contour-based approach for reining volume image segmentation  [in Japanese]

    Takashi Ijiri , Hideo Yokota

    三次元画像のための全自動や半自動の領域抽出手法が多く開発されているが,未だ,任意の画像と抽出対象に対して,完全にユーザの意図通りの結果を出力できるまでには至っていない.そこで本研究では,既存手法により抽出された領域を,効率的かつ直観的に修正できる,輪郭線編集を利用した新しいユーザインタフェースを提案する.提案システムでは,抽出領域の形状と三次元画像の断面を参照しながら,三次元的な輪郭曲線の形状を編 …

    IPSJ SIG Notes 2011-CG-142(15), 1-6, 2011-02-01

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  • 2

    Various Efforts Towards Performance Improvement of Vision-based MR Tracking Method Using the Feature Landmark Database  [in Japanese]

    Kitamura Kazuhiro , Inoue Keisuke , Tsuyumu Masato , Ichikari Ryosuke , Shibata Fumihisa , Tamura Hideyuki

    我々は,複合現実感技術を用いて映画制作を支援するMR-PreVizの研究を行っており,ランドマークデータべースに基づくキャメラトラッキング手法を採用している.本稿では,データべース構築時とトラッキング時で近いキャメラパスを辿るように制限した「リハーサル・パス法」を提案する.またビジョンべースの手法において,自然特徴点が十分に得られないシーンや,キャメラ移動が速い場合は位置合わせが難しいという問題が …

    Technical report of IEICE. PRMU 110(381), 177-182, 2011-01-13

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  • 3

    Various Efforts Towards Performance Improvement of Vision-based MR Tracking Method Using the Feature Landmark Database  [in Japanese]

    Kitamura Kazuhiro , Inoue Keisuke , Tsuyumu Masato , Ichikari Ryosuke , Shibata Fumihisa , Tamura Hideyuki

    我々は,複合現実感技術を用いて映画制作を支援するMR-PreVizの研究を行っており,ランドマークデータべースに基づくキャメラトラッキング手法を採用している.本稿では,データべース構築時とトラッキング時で近いキャメラパスを辿るように制限した「リハーサル・パス法」を提案する.またビジョンべースの手法において,自然特徴点が十分に得られないシーンや,キャメラ移動が速い場合は位置合わせが難しいという問題が …

    Technical report of IEICE. Multimedia and virtual environment 110(382), 177-182, 2011-01-13

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  • 4

    An Efficient Motion Vector Coding Scheme Based on Prioritized Reference Decision

    ZHOU Dajiang , ZHOU Jinjia , GOTO Satoshi

    … If not, the median prediction is considered not suitable for the current MV, and this information is used for refining the possible space of a group of reference MVs including 4 neighboring MVs and the zero MV. … Experimental result shows that the proposed scheme achieves a considerable reduction of bits for MVDs, compared with the conventional median prediction algorithm. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 92(8), 1978-1985, 2009-08-01

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  • 5

    Introductory Education for Algorithm Construction: Understanding Concepts of Algorithm through Unplugged Work and Its Effects  [in Japanese]

    Manabu Sugiura , Yoshiaki Matsuzawa , Ken Okada , Hajime Ohiwa

    一般情報教育の一環として実施するプログラミング教育においては「与えられた課題を理解・分析して,それを手順に分解・詳細化し,プログラムとして記述可能なアルゴリズムを組み立てる」という「アルゴリズム構築能力」をどのような方法で育成するかが課題となる.本論文では,アルゴリズムの概念を体感的に理解させるための導入教育を行うことにより,効果的にアルゴリズム構築能力を育成するという教育方法を提案し,その効果を …

    IPSJ Journal 49(10), 3409-3427, 2008-10-15

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  • 6

    Shape Analysis of a Human Body Wearing Clothing Based on PCA of Time-series Volume Data  [in Japanese]

    Norimichi Ukita , Ryosuke Tsuji , Masatsugu Kidode

    人体の3次元復元形状に対して,復元誤りの修正および各体節領域の特定を同時にオンライン実行できる手法を提案する.提案手法は,任意の人体や形状変化の大きな非剛体着衣にも適用可能であるという特徴を持つ.本手法は,詳細解析により得られる対象の高精度形状の時系列変化を体節ラベル付きで事前に学習し,この学習データと入力データとの比較による形状解析を行う.また,学習データ探索の高速化のため,時系列形状は主成分分 …

    情報処理学会論文誌. コンピュータビジョンとイメージメディア 1(2), 63-75, 2008-07-24

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  • 7

    Quantization Parameter Refinement in H.264 through ρ-Domain

    DONG Yutao , FANG Xiangzhong , YANG Jing

    … This letter proposes a new algorithm of refining the quantization parameter in H.264 real-time encoding. … In order to make the actual encoded bit rate closer to the target bit rate, ρ-domain rate model is introduced in our proposed quantization parameter refinement algorithm. … Simulation results show that the proposed algorithm achieves obvious gain in PSNR and has stabler encoded bit rate compared to Jiang's algorithm. …

    IEICE Transactions on Information and Systems 91(6), 1834-1837, 2008-06-01

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  • 8

    Hybrid Modeling of Molten Steel Temperature Prediction in LF

    TIAN Huixin , MAO Zhizhong , WANG Yan

    … Combining the conventional mechanism method with the newly developed intelligent algorithm, a hybrid model was developed for predicting the molten steel temperature in LF. … The mechanism method is used to build the thermal model by analyzing the energy going into and out of the molten steel during the LF refining production process. … In this paper, a new ensemble ELM algorithm using the modified AdaBoost.RT is proposed to calculate these coefficients. …

    ISIJ International 48(1), 58-62, 2008-01-15

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  • 9

    Analysis of Programming Test by Item Response Theory  [in Japanese]

    Furutani Hiroshi , Aikoh Yayoi

    … IRT is used for developing and refining test items in many fields of education. …

    Memoirs of the Faculty of Engineering, Miyazaki University 36, 333-338, 2007-08-30

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  • 10

    Shape Analysis of a Human Body with Clothing based on PCA of Time-seiries Volume Data  [in Japanese]

    TSUJI RYOSUKE , UKITA NORIMICHI , KIDODE MASATSUGU

    任意の人体や形状変化の大きな非剛体着衣にも適用可能な,人間の3次元復元誤差の除去および各体節部位の特定を同時にオンライン実行できる手法を提案する.本手法は,詳細解析により得られる対象の高精度形状の時系列変化を体節ラベル付で事前に学習し,この学習データと入力データとの比較による形状解析を行う.また,学習データ探索の高速化のため,時系列形状は主成分分析して固有空間上の多様体として記録する.その固有空間 …

    IPSJ SIG Notes. CVIM 2007(31), 131-138, 2007-03-19

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  • 11

    Accurate Thickness Measurement of Two Adjacent Sheet Structures in CT Images(<Special Section>Advanced Image Technology)

    CHENG Yuanzhi , SATO Yoshinobu , TANAKA Hisashi , NISHII Takashi , SUGANO Nobuhiko , NAKAMURA Hironobu , YOSHIKAWA Hideki , WANG Shuguo , TAMURA Shinichi

    … The difference between the predicted and the actual gray-level profiles observed in the CT data is minimized by refining the model parameters. … Both a one-by-one search (exhaustive combination search) technique and a nonlinear optimization technique based on the Levenberg-Marquardt algorithm are used to minimize the difference. …

    IEICE transactions on information and systems E90-D(1), 271-282, 2007-01-01

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  • 12

    5A3 GENETIC ALGORITHM WITH REDUCTION OF SEARCH SPACE USING OPERATIONAL CONSTRAINTS AND ITS APPLICATION TO SCHEDULING SYSTEM FOR STEELMAKING PROCESS(Technical session 5A: Application and practice 2)

    Fujii Satoshi , Tomiyama Shinji , Kimura Ryosuke

    … This paper describes an automatic scheduling system for steelmaking process from a refining converter to continuous casters. … The proposed scheduling procedure consists of optimal method by using modified genetic algorithm. …

    Proceedings of International Symposium on Scheduling 2006, 120-125, 2006-07-18

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  • 13

    Optimizing the Universal Visible Antireflection Coating Design for Substrates by Exchanging Search Algorithms

    Liou Yeuh-Yeong , Liu Yu-Tsung

    … A design algorithm, based on the exchanging search technique, was used for optimizing the visible antireflection coating design of substrates with refractive indices ranging from 1.45 to 1.784. … In this method, a tuning operation for the layer thicknesses of a two-material multilayer assembly was first carried out, followed by an exchanging operation for further refining the visible antireflection performance and simplifying the design structure. …

    Jpn J Appl Phys 44(4A), 1748-1751, 2005-04-15

    The Japan Society of Applied Physics References (9)

  • 14

    Incremental Construction of Delaunay Overlaid Network for Virtual Collaborative Space(Special Issue on the Retirement of Professor Shuzo YAJIMA)

    OHNISHI Masaaki , NISHIDE Ryo , UESHIMA Shinichi

    本稿では,仮想共有空間実現のためのドロネーオーバーレイネットワークの段階的構成アルゴリズムを提案する.提案アルゴリズムでは,各ノードが他のノードに関する情報をもとにドロネー三角化手法を自律的に行い,局所的なドロネーネットワークを生成する.同時にノードが協調的に相互に情報を交換することにより,大域的なドロネーネットワークをベースネットワーク上に重畳的に構築することができる特徴を持つ.生成されたドロネ …

    Journal of informatics 22, 41-65, 2005-03-15

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  • 15

    Digital Designs of Broadband Visible Antireflection Coating for Wide Angular Incidence

    Liou Yeuh-Yeong , Liu Yu-Tsung

    … A design algorithm based on a modified minimizing search technique is applied to design a visible antireflection coating for a wide angular incidence with an angle up to 30° from the normal. … The design approach consisting of tuning and minimizing operations is effective in refining the antireflective performance and simplifying the design structure of the desired solution. …

    Jpn J Appl Phys 44(1A), 163-167, 2005-01-15

    The Japan Society of Applied Physics References (11)

  • 16

    An Integrated Approach Containing Genetic Algorithm and Hopfield Network for Object Recognition under Affine Transformations(Image Processing and Video Processing)

    HUANG Chin-Chung , HER Innchyn

    … Both the Hopfield network and the genetic algorithm are powerful tools for object recognition tasks, e.g., subgraph matching problems. … The genetic algorithm, on the other hand, usually only finds a near-global solution, and it is time-consuming for large-scale problems. … First, we use some specialized 2-D genetic algorithm operators to accelerate the convergence. …

    IEICE transactions on information and systems E87-D(10), 2356-2370, 2004-10-01

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  • 17

    Placement of Vertex Labels in a Graph Drawing(Graphs and Networks)

    ABE Noboru , MASUDA Sumio , YAMAGUCHI Kazuaki

    … By refining several portions of the Kakoulis-Tollis algorithm for labeling graphical features, we present a heuristic algorithm for this problem. … Experimental results show that our algorithm can place more labels than previous algorithms. …

    IEICE transactions on fundamentals of electronics, communications and computer sciences E87-A(10), 2774-2779, 2004-10-01

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  • 18

    Two-Step Search for DNA Sequence Design(<Special Section>Papers Selected from 2003 International Technical Conference on Circuits/Systems, Computers and Communications(ITC-CSCC 2003))

    KASHIWAMURA Satoshi , KAMEDA Atsushi , YAMAMOTO Masahito , OHUCHI Azuma

    … In this paper, we introduce a powerful design strategy for DNA sequences by refining Random Generator. … Random Generator is one of the design strategies andoffers great advantages, but it is not a good algorithm for generating a large set of DNA sequences. … We propose a Two-Step Search algorithm, then show that TSS can generate a larger set of DNA sequences than Random Generator by computer simulation. …

    IEICE transactions on fundamentals of electronics, communications and computer sciences E87-A(6), 1446-1453, 2004-06-01

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  • 19

    Abstraction of Pattern Rule Set for detecting Noun Phrase based on Linguistic Hypothesis

    GORIOUCHKINA EKATERINA , ADACHI AKIRA , MAKINO TAKENORI

    … Then, a refining algorithm removes ineffective rules from the pattern rule set. …

    IPSJ SIG Notes 2004(23), 17-22, 2004-03-04

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  • 20

    Refining algorithm of pattern rule set for detecting noun phrases in English

    GORIOUCHKINA Ekaterina , ADACHI Akira

    … The present approach is based on a refining algorithm of pattern rules extracted from the Penn TreebankS corpus. … The algorithm to obtain the best set of pattern rules is introduced for two steps to refine pattern rule set. …

    IPSJ SIG Notes 2004(1), 163-168, 2004-01-13

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