Search Results:　 1-20 of 55

  • 1

    Distributed Video Coding by applying Super Resolution with Learning-Based Kernel Regression  [in Japanese]

    NAKAMURA Ryotaro , KUDOH Shinobu , NAKACHI Takayuki , HAMADA Nozomu

    分散映像符号化(Distributed Video Coding:DVC)は,復号側でフレーム間補間を行う映像符号化方式である.しかし,その符号化効率は他の標準化されているH.264/AVCをはじめとした既存の符号化には及ばないため符号化効率を改善する研究がなされている.DVCの符号化効率はSide Informationの予測精度とKeyフレームの符号量に影響される.本稿では,超解像度復元をDV …

    IEICE technical report. Communication systems 111(467), 25-30, 2012-03-01

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  • 2

    Distributed Video Coding by applying Super Resolution with Learning-Based Kernel Regression  [in Japanese]

    NAKAMURA Ryotaro , KUDOH Shinobu , NAKACHI Takayuki , HAMADA Nozomu

    分散映像符号化(Distributed Video Coding:DVC)は,復号側でフレーム間補間を行う映像符号化方式である.しかし,その符号化効率は他の標準化されているH.264/AVCをはじめとした既存の符号化には及ばないため符号化効率を改善する研究がなされている.DVCの符号化効率はSide Informationの予測精度とKeyフレームの符号量に影響される.本稿では,超解像度復元をDV …

    IEICE technical report. Circuits and systems 111(465), 25-30, 2012-03-01

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  • 3

    Distributed Video Coding by applying Super Resolution with Learning-Based Kernel Regression  [in Japanese]

    NAKAMURA Ryotaro , KUDOH Shinobu , NAKACHI Takayuki , HAMADA Nozomu

    分散映像符号化(Distributed Video Coding:DVC)は,復号側でフレーム間補間を行う映像符号化方式である.しかし,その符号化効率は他の標準化されているH.264/AVCをはじめとした既存の符号化には及ばないため符号化効率を改善する研究がなされている.DVCの符号化効率はSide Informationの予測精度とKeyフレームの符号量に影響される.本稿では,超解像度復元をDV …

    IEICE technical report. Signal processing 111(466), 25-30, 2012-03-01

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  • 4

    Practical approach in estimating inertial navigation unit's errors

    Lim C.H. , Tan W.Q. , Lim T.S. , Koo V.C.

    … The empirical values of the errors are then fed into the INU's system model for error correction using Kalman filtering. … Finally, the calibrated INU shows promising results in preserving long term accuracy of the motion sensor. …

    IEICE Electronics Express 9(8), 772-778, 2012

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  • 5

    Accuracy of Multilevel Registration in Image-Guided Pedicle Screw Insertion for Adolescent Idiopathic Scoliosis

    TAKAHASHI Jun , HIRABAYASHI Hiroki , HASHIDATE Hiroyuki , OGIHARA Nobuhide , KATO Hiroyuki

    … Because of possible intervertebral motion and usual difference in patients' position between preoperative imaging and surgery, the imaging model and the surgically exposed spine may be significantly discordant. … Variables including surgical time, blood loss, preoperative and 2-year postoperative Cobb angle, correction rate, and postoperative screw position by computed tomography image were evaluated. …

    Spine 35(3), 347-352, 2010-02-01

    IR CrossRef References (37) Cited by (2)

  • 6

    Novel Tool Design Method for Orbiting EDM -A 2nd Approach on Design Automation Developed in CAD-:-A 2<SUP>nd</SUP> Approach on Design Automation Developed in CAD-

    SRIANI Tutik , AOYAMA Hideki

    … In orbiting process, the tool sweeps out some extra volume due to the additional orbit motion. … Currently, tool correction is done manually since there is no CAD package which provides a specific assistance to adjust the tool geometry for orbital motion. … Therefore, design process becomes lengthy and more prone to error due to manual correction process. …

    Journal of Advanced Mechanical Design, Systems, and Manufacturing 4(7), 1261-1271, 2010

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  • 7

    A Preliminary Study of Human Motion Recognition Using Error Correction Learning  [in Japanese]

    Hitoshi Sakano , Takeshi Yamada , Katsuhiko Ishiguro

    機械操作行動の認識について初期的な結果を得たので報告する.ロボット,自動車など人間と共生する知的機械が人間の動作を認識することは,コミュニケーション,安全確保,利便性向上の観点から重要である.本論文では自動車運転者の操作行動を認識する問題を取り上げる.操作行動認識は安全確保,利便性の観点から多くの可能性がある.本論文ではこの問題に著者が提案している「パターン認識の初期検討プロセス」を適用することで …

    情報処理学会論文誌. 数理モデル化と応用 2(3), 153-161, 2009-12-11

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  • 8

    Advantages of Foveation in Vehicle Sensor Motion : Uniform Optical Flow Model  [in Japanese]

    SHIMIZU Sota

    … A correction weight function is introduced for estimating the error in the optical flow that is calculated by using each image model. … The accuracy of the optical flow corresponding to a point on the VCS is investigated in simulations carried out using the correction weight function. …

    IEEJ Transactions on Industry Applications 129(6), 608-613, 2009-06-01

    J-STAGE CrossRef References (14)

  • 9

    A Preliminary Study of Human Motion Recognition and Personal Adaptation Using Error Correction Learning(Session 1D)  [in Japanese]

    SAKANO HITOSHI , YAMADA TAKESHI , ISHIGURO KATSUHIKO

    機械操作行動の認識について初期的な結果を得たので報告する.ロボット,自動車など人間と共生する知的機械が人間の動作を認識し,個人の行動の個性に適応していく問題は単なる学習問題ではなく,複数の教師あり学習と教師無し学習が混在する新しいクラスの問題である.本論文ではこの問題に対して特に自動車の操作行動を対象として初期的な検討を行った.学習ベクトル量子化とSelf-trainingを適用することにより,こ …

    IPSJ SIG Notes 2009(19), 145-148, 2009-02-26

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  • 10

    MR and Histopathology Image Fusion using Nonrigid Registration and Combined Visualization(International Forum on Medical Imaging in Asia 2009 (IFMIA 2009))

    Jung Julip , Hong Helen , Lee Hack Jong , Hwang Sung Il

    … First, density correction is performed to prevent a mistake which a hemorrhage is considered as a tumor on T2-weighted MR images. … Third, B-spline based nonrigid registration is used for correcting the deformable motion of the prostate. … After finishing our registrations, the average distance difference error of contour in initial misalignment was reduced from 1.78mm to 0.9mm. …

    IEICE technical report. 108(385), 591-592, 2009-01-12

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  • 11

    Non-Equilibrium Thermo Field Dynamics and Its Application to Error-Correction for Spatially Correlated Quantum Errors

    ARIMITSU Toshihico

    … As an application of the formalism, a model of noisy-channel which is under the influence of spatially correlated quantum Brownian motion is investigated within the framework of NETFD. … It is shown that errors due to spatially correlated noises can be corrected by the quantum error-correction code and error-correction procedure prepared for those for independent noises. …

    Interdisciplinary Information Sciences 15(3), 441-471, 2009

    IR J-STAGE CrossRef

  • 12

    A26 Studies on the dynamic analysis of snowboarding turn  [in Japanese]

    HIROSE Kiyoshi , DOKI Hitoshi

    … The purpose of this study is to establish the system to measure physical form in snowboarding turn, the correction method to improve accuracy and the analysis method to indicate physical form. … The correction method reduces the drift error of gyro sensor using Extended Kalman Filter, the analysis method provides joint angle from information of this measurement system. …

    ジョイント・シンポジウム講演論文集 : スポーツ工学シンポジウム : シンポジウム:ヒューマン・ダイナミックス : symposium on sports engineering : symposium on human dynamics 2008, 133-136, 2008-11-05

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  • 13

    Channel Adaptive Error Resilience Scheme for Video Transmission over Mobile WiMAX

    KIM Hye-Soo , CHOI Byeong-Doo , PARK Chun-Su , PARK Sang-Hee , KO Sung-Jea

    … In this paper, we propose a channel adaptive error resilience scheme for video transmission over mobile WiMAX. … When the channel condition begins to trigger handoff, the current frame is stored in the long-term memory for the forward error correction, and the following frames are encoded by using double motion vectors (MVs) in the sense of multi-hypothesis motion compensation. …

    IEICE Transactions on Communications 91(10), 3052-3059, 2008-10-01

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  • 14

    QUANTUM ERROR-CORRECTION FOR SPATIALLY CORRELATED ERRORS

    ARIMITSU T. , HAYASHI T. , KITAJIMA S. , SHIBATA F. , 有光 敏彦

    … It is shown that errors due to spatially correlated noises can be corrected by the quantumerror-correction code and error-correction procedure prepared for those for independentnoises. … A model of noisy-channel which is under the influence of spatially correlated quantumBrownian motion is investigated within the framework of non-equilibrium thermofield dynamics that is a canonical operator formalism for dissipative quantum systems. …

    International journal of quantum information 6(Supplement), 575-580, 2008-07-00

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  • 15

    Real-time Compensation of Circular Interpolation Motion Error by Inverse Transfer Function Based on Friction Analysis  [in Japanese]

    UNNO Toru , MORIMOTO Yoshitaka , ICHIDA Yoshio , SATO Ryunosuke

    … The stick motion is suppressed 50% of trajectory error of the conventional PID control without identifying the parameters previously. … However, the suppression of stick motion was not enough because the friction force at quadrant motion is not considered directly. … The friction correction is applied to a real-time inverse transfer functional method considering the dynamic behavior of the friction. …

    Journal of the Japan Society of Precision Engineering 74(6), 616-621, 2008-06-05

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  • 16

    1206 Measurement Method for Aerodynamic Force of a Flying Ball by a Single Video Camera(2)  [in Japanese]

    NAKANISHI Tatsuya , MATSUNO Takashi , IWATA Hiroshi , KAWAZOE Hiromitsu

    … In this method only a single image stream by a single video camera is required to measure forces and moments of a full 6 DOF motion of flying object. … To minimize the error from the geometric distortion in images which is from the optical system, we applied the correction using the distortion model represented by polynomials of angles from the center of image. …

    Fluids engineering conference ... 2007, "1206-1"-"1206-4", 2007-11-17

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  • 17

    Frequency characteristics of non-contact ultrasonic motor with motion error correction

    ISOBE Hiromi , KYUSOJIN Akira

    Precision engineering 31(4), 351-357, 2007-10-01

    References (18)

  • 18

    Robust Super-Resolution under Occlusion and Illumination Change  [in Japanese]

    YAGUCHI Youichi , TANAKA Masayuki , OKUTOMI Masatoshi

    超解像処理は,複数の低解像度画像間の精密な位置合わせ処理を必要とする.しかし,注目物体にオクルージョンが生じた場合やモーションモデルが不十分な場合などに,位置合わせが不正確になることがある,提案手法では,小領域ごとに類似度と位置合わせ誤差の再評価を行い,超解像処理に利用する画素を選択することによって位置合わせ誤差にロバストな超解像処理を実現する.また,明るさの補正も行い,より高画質な超解像処理結果 …

    IPSJ SIG Notes. CVIM 2007(42), 51-56, 2007-05-14

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  • 19

    Development of a Measuring Method for Motion Accuracy of NC Machine Tools Using Links and Rotary Encoders : Modification to the Measuring System, Error Parameters Estimation and the Results of Measurement Experiments(Machine Elements and Manufacturing)  [in Japanese]

    IWAI Hiroaki , BOELENS Maarten , FUJINO Kenichiro , MITSUI Kimiyuki , HAYASHI Akira

    … In this paper, we describe the structure of the newly modified device and the estimation method for 11 error parameters concerning the link length errors and inclination of link axises. … The fact that the measurement of a machine motion in rectangular tool path is possible with an accuracy of ±3μm error and that the accuracy of circularity tests are much improved, show the validity of our proposed measurement device and that of the error parameters estimation method. …

    Transactions of the Japan Society of Mechanical Engineers. C 73(726), 619-625, 2007-02-25

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  • 20

    A Proposal of Forward Error Correction Method for Visual Communication Systems(Multimedia Communication,<Special Issue>Multimedia, Distributed, Cooperative and Mobile (DICOMO2005))  [in Japanese]

    YOSHIMURA YASUHIKO , MOCHIZUKI KONOMI , UEMATSU YOSHIHIKO , SUZUKI RYOICHI

    IPネットワーク上での双方向映像通信ほ実時間性への要求条件が厳しく,パケット損失や遅延といったネットワーク品質の劣化が映像品質に与える影響が大きい.実時間性の厳しいアプリケーションに対してネットワーク中でのパケット損失への耐性を向上させる方法として誤り訂正方式があり,すでに多くのシステムで利用されている.一方,双方向映像通信ではMPEG4のような可変長パケット,可変レートを特徴とするコーデックが一 …

    IPSJ Journal 47(7), 2030-2039, 2006-07-15

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