Search Results 1-20 of 27

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  • Identification of n-Quarter Circular Arcs and n-Quarter Elliptic Arcs Based on Freehand Curve Identifier FSCI  [in Japanese]

    NAKAJIMA Kousuke , HATAMOTO Naoya , ITO Tomohiko , SHIBATA Takeshi , SAGA Sato

    <p>描画軌跡と描画動作のあいまいさをもとにして手書き曲線を7種類の幾何曲線(線分,円,円弧,楕円,楕円弧,閉自由曲線,開自由曲線)のいずれかに同定する手法として「ファジィスプライン曲線同定法(FSCI)」が提案されている.また,FSCIによって同定された幾何曲線を正方グリッドに合わせて整形する手法として「多重解像度ファジィグリッドスナッピング法(MFGS)」が提案されており,このMF …

    Journal of Japan Society for Fuzzy Theory and Intelligent Informatics 31(3), 701-711, 2019

    J-STAGE 

  • Ellipse Self-window Method for High-speed High-resolution Optical Tracking of Medaka  [in Japanese]

    末石 智大 , 小川 拓也 , 谷内田 尚司 , 渡辺 義浩 , 石川 正俊

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 117(514), 213-218, 2018-03-18

  • Ellipse Self-window Method for High-speed High-resolution Optical Tracking of Medaka  [in Japanese]

    末石 智大 , 小川 拓也 , 谷内田 尚司 , 渡辺 義浩 , 石川 正俊

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 117(513), 213-218, 2018-03-18

  • Automatic extracting of linear-shaped mesoscale convective system during sediment disasters using operational radar data  [in Japanese]

    TSUJIMOTO Hirofumi , MASUDA Aritoshi , MANAKA Tomohisa

    … In this paper, the characteristics of LsMCS during sediment disaster events are investigated using radar data which has 5 minutes time interval and 1 km horizontal resolution. … To extract the LsMCS from radar data, a contiguous regions of convective cell group is identified with more than 20 mm/h of rainfall intensity and more than 300 k㎡ of the area. …

    Journal of the Japan Society of Erosion Control Engineering 69(6), 49-55, 2017

    J-STAGE 

  • Scatter Correction of Septal Penetration for <sup>123</sup>I-IMP Cerebral Blood Flow SPECT Adding Radioactivity from the Outside of Field of View―Comparison between Simulation-based and Multi-window Scatter Corrections  [in Japanese]

    Yamanaga Takashi , Shiomi Susumu , Katayama Yutaka , Nakama Shota , Kakimi Akihiko , Nagahata Tomomasa , Kishimoto Kenji , Ichida Takao , Higashiyama Shigeaki , Kawabe Joji

    … <p><i>Purpose</i>: The N-Isopropyl-p-[123I] Iodoamphetamine (<sup>123</sup>I-IMP) SPECT imaging reduces the image quality and quantitative accuracy due to scatter and septal penetration occurred by radioactive uptake from outside of the field of view such as the lungs. …

    Japanese Journal of Radiological Technology 73(10), 1028-1038, 2017

    J-STAGE  Ichushi Web 

  • Application of the geometric accuracy estimation model of the terrain corrected data to TerraSAR-X data  [in Japanese]

    NONAKA Takashi , TSUKAHARA Koichi

    … The purpose of this study was to acquire the knowledge about the application of the constructed model for the evaluation of the geometric accuracy of the terrain corrected data to high-resolution TerraSAR-X data. …

    Journal of the Japan society of photogrammetry and remote sensing 53(6), 242-249, 2015

    J-STAGE 

  • Active Electro-Optical Probe System for B1-Field Polarization Mapping in Magnetic Resonance Imaging Systems

    Sven Kuehn , Beyhan Kochali , Niels Kuster

    IEICE Proceeding Series (18), 16P3-H3, 2014

    DOI 

  • Accurate Target Extrapolation Method Exploiting Double Scattered Range Points for UWB radar

    YAMARYO Ayumi , KIDERA Shouhei , KIRIMOTO Tetsuo

    … Ultra-wide band (UWB) radar has a great advantage for range resolution, and is suitable for 3-dimensional (3-D) imaging sensor, such as for rescue robots or surveillance systems, where an accurate 3-dimensional measurement, impervious to optical environments, is indispensable. … Thus, an estimated region of target image often becomes too small to identify whether it is a human body or other object. …

    IEICE Transactions on Electronics E97.C(8), 828-832, 2014

    J-STAGE 

  • Comparison of methods of algebraic strain estimation from Rf/φ data: A unified theory of 2D strain analysis

    Yamaji Atsushi

    … A unified development of the subject of the algebraic strain analysis methods using Rf/φ data is outlined, embodying the main features the theories of Shimamoto and Ikeda, Mulchrone et al. … It is shown that the theories yields an identical strain ellipse from the same data set. …

    Journal of Structural Geology (49), 4-12, 2013-04

    IR 

  • Accurate Image Expansion Method Using Range Points Based Ellipse Fitting for UWB Imaging Radar

    ABE Yoriaki , KIDERA Shouhei , KIRIMOTO Tetsuo

    … Ultra-wideband (UWB) pulse radars have a definite advantage in high-range resolution imaging, and are suitable for short-range measurements, particularly at disaster sites or security scenes where optical sensors are rarely suitable because of dust or strong backlighting. …

    IEICE Transactions on Communications 95(7), 2424-2432, 2012-07-01

    J-STAGE  References (15)

  • Model-based Gaze Estimation Method with Low-Resolution RGB Images of Eyes  [in Japanese]

    FUKUDA Takashi , YAMANA Hayato

    人間工学,市場戦略などに用いられる視線情報は,自然な状態に置かれた多くの被験者から得られることが望ましい.これらの条件を満たすためには,Webカメラを用いることが有効である.Webカメラを用いて非接触型視線推定を実現する場合,使用する目画像の解像度が低く,誤差が生じることが問題となる.これに対し,これまで我々はWebカメラから得られる低解像度目画像を用いて,眼球の回転角度を連続値で詳細に推定する非 …

    Technical report of IEICE. PRMU 111(499), 31-36, 2012-03-22

    References (13)

  • Model-based Gaze Estimation Method with Low-Resolution RGB Images of Eyes  [in Japanese]

    FUKUDA Takashi , YAMANA Hayato

    人間工学,市場戦略などに用いられる視線情報は,自然な状態に置かれた多くの被験者から得られることが望ましい.これらの条件を満たすためには,Webカメラを用いることが有効である.Webカメラを用いて非接触型視線推定を実現する場合,使用する目画像の解像度が低く,誤差が生じることが問題となる.これに対し,これまで我々はWebカメラから得られる低解像度目画像を用いて,眼球の回転角度を連続値で詳細に推定する非 …

    Technical report of IEICE. HIP 111(500), 31-36, 2012-03-22

    References (13)

  • Development of a new tool of laser scanner for borehole deformation to estimate stress orientation at shallow depth  [in Japanese]

    Kiguchi Tsutomu , Kuwahara Yasuto , Sato Namiko , Yokoyama Tatsuya

    深度20 m程度までの地殻応力方位を測定するために,レーザー変位計を用いて掘削直後のボーリング孔の孔径変化を連続測定する装置を開発した.本装置を用いた新たな応力場評価法は以下の原理・手法に基づいている.1)異方的な応力がかかった岩盤に孔井を掘削した場合,岩石の持つ粘性の効果によって,掘削直後から孔井は異方的にクリープ変形をする.2)孔井断面の異方的な変形に楕円を近似することにより,楕円の短軸方向か …

    BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN 61(9-10), 337-350, 2010

    J-STAGE 

  • Traffic Signs Recognition Based on Color and Shape Information

    GU Yanlei , YENDO Tomohiro , PANAHPOUR TEHRANI Mehrdad , FUJII Toshiaki , TANIMOTO Masayuki

    … This paper proposes a method for circular traffic signs recognition using a novel system composed of two cameras and two galvanometer mirrors. … The contour shape information is used for detecting the candidate positions of traffic signs in wide angle camera. … Galvanometer mirrors are controlled according to centers of candidates. … High resolution images of candidates are captured using narrow angle camera and used for classification. …

    IEICE technical report 109(182), 109-114, 2009-08-24

    References (12)

  • 4-5 Traffic Sign Recognition Using Wide Angle Camera Cooperated with Narrow Angle Camera

    GU Yanlei , YENDO Tomohiro , PANAHPOUR TEHRANI Mehrdad , FUJII Toshiaki , TANIMOTO Masayuki

    … The edge information and ellipse fitting method are used for detecting the candidates of traffic signs in wide angle camera. … The high resolution images of candidate are captured using narrow angle camera. …

    PROCEEDINGS OF THE ITE ANNUAL CONVENTION 2009(0), _4-5-1_-_4-5-2_, 2009

    J-STAGE 

  • Fast Visual Acuity Simulation Using Wavefront Tracing from the Retina  [in Japanese]

    KAKIMOTO Masanori , TATSUKAWA Tomoaki , NISHITA Tomoyuki

    人間の眼球を光学系としてモデル化し,視力に応じて網膜中心窩に映る画像を高速表示する手法を提案する.筆者らはすでに,点光源の網膜への投影結果は一般に楕円形で,波面追跡法により計算できることを示した.従来は空間各点から波面追跡を行っていたが,逆に網膜から空間各点に向けて波面追跡を行うことにより,より高精度な焦点ボケ情報を高速に計算できた.さらに実際の眼の視野角と両眼球の回旋を考慮した拡大表示法も提案す …

    IPSJ SIG Notes 133, 7-12, 2008-10-31

    References (8)

  • Geometric Curve Snapping with Multi-Resolution Fuzzy Grid Snapping Method : Application for Ellipse and Elliptic Arc  [in Japanese]

    SAKURAI MASAKI , SAGA SATO

    我々は既に,手書き曲線をその形状と描画のあいまいさに基づいて,7種類の基本幾何曲線のいずれかとして同定するファジィスプライン曲線同定法(FSCI)を提案した.また,描画のあいまいさの程度に応じて,動的にグリッド解像度を選択する多重解像度ファジィグリッドスナッピング(MFGS)法による位置スナッピングを提案し,同定基本幾何曲線のうち,線分,円,円弧の多重解像度スナッピングを実現した.本稿では,MFG …

    情報処理学会研究報告. HI,ヒューマンインタフェース研究会報告 119, 119-126, 2006-07-07

    References (9)

  • Accuracy of Planer Multi–joint Positioning System

    Fukada Shigeo , Yanagihara Yusuke

    水平多関節型位置決め機構による位置決めの再現性を評価するため,2次元PSDを用いた簡便な測定システムを構成し,長時間にわたる位置決めのドリフト性能と,比較的短時間内の繰り返し性を測定した.電源投入後から位置決めを600回程度反復する間はドリフトが見られが,以降はほぼ一定の点の周辺にばらついた.また,各関節の角度分解能とアームの可操作方向から定まる分解能楕円を定義し,実際のばらつき楕円との関係を考察 …

    Proceedings of JSPE Semestrial Meeting 2006S(0), 887-888, 2006

    J-STAGE 

  • DEVELOPMENT OF CHARACTERISTICS TYPE AND CONSERVATIVE TYPE HIGH-ORDER 6-POINT SCHEME  [in Japanese]

    ASAI Koji , TSUBOGO Koichi , KOMATSU Toshimitsu

    小松らが開発した6-point schemeは特性曲線法に基づく手法で1次精度であるが, 高精度で移流計算を行うことができる. 特にガウス分布などの極値の再現性に優れている. 一方, 様々な勾配の値を含む半楕円分布の再現性には改良の余地がある. 本論文では小松らの6-point schemeの誘導の概念に従い, 3次精度および4次精度の6-point schemeを提案する. これを特性曲線形式高 …

    Doboku Gakkai Ronbunshu (803), 29-44, 2005-11-21

    J-STAGE  References (15) Cited by (2)

  • A numerical study of the ocean circulation around the northern Antarctic Peninsula: Barotropic response to tidal forcing

    Dragani Walter C. , D'Onofrio Enrique E. , Speroni Jorge O. , Fiore Monica E. , Borjas Roco

    … A high-resolution shallow water model was implemented to study tidal propagation around the northern Antarctic Peninsula. … Numerical experiments were done using a grid with 3.00′longitude and 1.05′latitude resolution. … Amplitudes and phases of the four main tidal constituents (M_2, S_2, K_1 and O_1) were used to force the model. …

    Polar geoscience (18), 83-100, 2005-10

    IR 

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