Search Results:　 1-20 of 58

  • 1

    Two-Dimensional Tracking of Heart Wall for Detailed Analysis of Heart Function at High Temporal and Spatial Resolutions

    Honjo Yasunori , Hasegawa Hideyuki , Kanai Hiroshi

    … For noninvasive and quantitative measurements of global two-dimensional (2D) heart wall motion, speckle tracking methods have been developed and applied. … These methods overcome the limitation of tissue Doppler imaging (TDI), which is susceptible to aliasing, by directly tracking backscattered echoes by pattern matching techniques, i.e., the cross-correlation or the sum of absolute differences, in real time. …

    Jpn J Appl Phys 49(7), 07HF14-07HF14-9, 2010-07-25

    The Japan Society of Applied Physics Cited by (3)

  • 2

    8x8 Transformation Based All Zero Block Detection for H.264/AVC Encoder

    SU Jia , LIU Qin , IKENAGA Takeshi

    The Journal of the Institute of Image Electronics Engineers of Japan 39(1), 12-22, 2010-01-25

    References (18)

  • 3

    A Low Bandwidth Integer Motion Estimation Module for MPEG-2 to H.264 Transcoding

    Wei Xianghui , Ikenaga Takeshi , Goto Satoshi

    … 1), a ping-pang memory control scheme combined with Partial Sum of Absolute Differences (SAD) Variable Block Size Motion Estimation (VBSME) architecture are realized. … Experiment results show bandwidth of the proposed architecture is 70.6% of H.264 regular IME (Level C+ scheme, 2 Macro Block (MB) stitched vertically), while the on-chip memory size is 11.7% of that. …

    IPSJ Transactions on System LSI Design Methodology 2, 114-121, 2009

    J-STAGE CrossRef

  • 4

    A High-Accuracy Sub-Pixel Correspondence Technique Using 1D Phase-Only Correlation  [in Japanese]

    SHIBAHARA Takuma , NUMA Norihito , NAGASHIMA Sei , AOKI Takafumi , NAKAJIMA Hiroshi , KOBAYASHI Koji

    … これまで,ステレオ画像の対応付けには,SAD (Sum of Absolute Differences)やSSD (Sum of Squared Differences)などの相違度に基づく画像マッチングが利用されてきた.これらの手法は,計算コストに優れているが,その反面,対応付け精度の低さが問題とされている.一方,二次元位相限定相関法(Phase-Only Correlation: …

    The IEICE transactions on information and systems (Japanese edetion) J91-D(9), 2343-2356, 2008-09-01

    CiNii Fulltext PDF - Subscription  References (17) Cited by (7)

  • 5

    Architecture of a Stereo Matching VLSI Based on Recursive Computation  [in Japanese]

    TANJI Keita , HARIYAMA Masanori , KAMEYAMA Michitaka

    … 3次元計測のためのステレオビジョンでは,画像間の対応を高速かつ高信頼に求めることが必要となる.対応点探索の手法として,SAD(Sum of Absolute Differences)演算に基づく方法がある.SAD演算に基づく対応点探索では,SAD演算が膨大な回数行われるため計算量の減少が重要となる.本稿では,SAD間の共通の中間結果に着目した再帰的SADを提案する.また,一般的な2眼ステレオ …

    Technical report of IEICE. ICD 108(28), 63-67, 2008-05-06

    CiNii Fulltext PDF - Subscription  References (3)

  • 6

    Architecture of a Stereo Matching VLSI Based on Recursive Computation  [in Japanese]

    TANJI Keita , HARIYAMA Masanori , KAMEYAMA Michitaka

    … 3次元計測のためのステレオビジョンでは,画像間の対応を高速かつ高信頼に求めることが必要となる.対応点探索の手法として,SAD(Sum of Absolute Differences)演算に基づく方法がある.SAD演算に基づく対応点探索では,SAD演算が膨大な回数行われるため計算量の減少が重要となる.本稿では,SAD間の共通の中間結果に着目した再帰的SADを提案する.また,一般的な2眼ステレオ …

    IPSJ SIG Notes 2008(39), 63-67, 2008-05-06

    CiNii Fulltext PDF - Open Access  References (3)

  • 7

    Design of a Trinocular-Stereo-Vision VLSI Processor Based on Optimal Scheduling

    HARIYAMA Masanori , YOKOYAMA Naoto , KAMEYAMA Michitaka

    … This paper presents a processor architecture for high-speed and reliable tinocular stereo matching based on adaptive window-size control of SAD (Sum of Absolute Differences) computation. … Window-parallel-and-pixel-parallel architecture is also proposed to achieve to fully exploit the potential parallelism of the algorithm. …

    IEICE Transactions on Electronics 91(4), 479-486, 2008-04-01

    J-STAGE CrossRef References (7)

  • 8

    Equity-Efficiency Bicriteria Location with Squared Euclidean Distances

    Ohsawa Yoshiaki , Ozaki Naoya , Plastria Frank , 大澤 義明

    … A facility must be located within a given region taking two criteria of equity and efficiency into account. … Equity is sought by minimizing the inequality in the facility-inhabitant distances, as measured by the sum of the absolute differences between all pairs of squared Euclidean distances from inhabitants to the facility. …

    Operations research 56(1), 79-87, 2008-02-00

    IR CrossRef

  • 9

    Logic integrated circuit using tunneling-magnetoresistive devices : Next-generation logic-LSI paradigm using nonvolatile devices  [in Japanese]

    HANYU Takahiro

    應用物理 76(12), 1388-1393, 2007-12-01

    References (12) Cited by (1)

  • 10

    An Experimental Study of Sub-Pixel Motion Estimation  [in Japanese]

    NUMA Norihito , AOKI Takafumi

    … う.動き推定は,映像符号化,超解像イメージング,コンピュータビジョンなどに不可欠な処理である.本稿では,差分絶対値和(Sum of Absolute Differences:SAD),差分自乗和(Sum of Squared Differences:SSD),位相限定相関法(Phase-Only Correlation:POC)の3つのブロックマッチング手法について,サブピクセル動き推定精度を評価する. …

    IEICE technical report. Image engineering 107(290), 31-36, 2007-10-19

    CiNii Fulltext PDF - Subscription  References (8)

  • 11

    An Experimental Study of Sub-Pixel Motion Estimation  [in Japanese]

    NUMA Norihito , AOKI Takafumi

    … う.動き推定は,映像符号化,超解像イメージング,コンピュータビジョンなどに不可欠な処理である.本稿では,差分絶対値和(Sum of Absolute Differences:SAD),差分自乗和(Sum of Squared Differences:SSD),位相限定相関法(Phase-Only Correlation:POC)の3つのブロックマッチング手法について,サブピクセル動き推定精度を評価する. …

    IEICE technical report. Signal processing 107(286), 31-36, 2007-10-19

    CiNii Fulltext PDF - Subscription  References (8) Cited by (3)

  • 12

    An Experimental Study of Sub-Pixel Motion Estimation  [in Japanese]

    NUMA Norihito , AOKI Takafumi

    … う.動き推定は,映像符号化,超解像イメージング,コンピュータビジョンなどに不可欠な処理である.本稿では,差分絶対値和(Sum of Absolute Differences:SAD),差分自乗和(Sum of Squared Differences:SSD),位相限定相関法(Phase-Only Correlation:POC)の3つのブロックマッチング手法について,サブピクセル動き推定精度を評価する. …

    Technical report of IEICE. ICD 107(288), 31-36, 2007-10-19

    CiNii Fulltext PDF - Subscription  References (8)

  • 13

    Design of a Trinocular-Stereo-Vision VLSI Processor Based on Optimal Scheduling  [in Japanese]

    YOKOYAMA Naoto , HARIYAMA Masanori , KAMEYAMA Michitaka

    ITE technical report 30(65), 55-60, 2006-12-14

    References (3)

  • 14

    Design of a Trinocular-Stereo-Vision VLSI Processor Based on Optimal Scheduling  [in Japanese]

    YOKOYAMA Naoto , HARIYAMA Masanori , KAMEYAMA Michitaka

    リアルワールドの環境認識のためには,高速かつ高信頼な3次元情報の取得が重要となる.典型的な3次元計測の手法として画像間の対応付けに基づくステレオビジョンがある.本稿では,対応点探索の高信頼化と計算量減少を両立する3眼ステレオマッチングアルゴリズムを提案する.複数のウィンドウサイズを段階的に用いることで対応点の信頼性を高め,計算量減少のために,重複のないウィンドウを用いる.また,3眼ステレオマッチン …

    Technical report of IEICE. ICD 106(425), 55-60, 2006-12-07

    CiNii Fulltext PDF - Subscription  References (3) Cited by (5)

  • 15

    A VLSI Architecture for Variable Block Size Motion Estimation in H.264/AVC with Low Cost Memory Organization(VLSI Architecture,<Special Section>VLSI Design and CAD Algorithms)

    SONG Yang , LIU Zhenyu , IKENAGA Takeshi , GOTO Satoshi

    … By properly choosing the partial sum of absolute differences (SAD) registers and scheduling the addition operations, the architecture can be implemented with simple control logic and regular workflow. … The design is realized in TSMC 0.18μm 1P6M technology with a hardware cost of 67.6K gates. … In typical working conditions (1.8V, 25℃), a clock frequency of 266MHz can be achieved. …

    IEICE transactions on fundamentals of electronics, communications and computer sciences E89-A(12), 3594-3601, 2006-12-01

    CiNii Fulltext PDF - Subscription  References (16)

  • 16

    Processor Architecture for Road Extraction Based on Projective Transformation  [in Japanese]

    LEE Sunggae , HARIYAMA Masanori , KAMEYAMA Michitaka

    … で,道路が平面である点に着眼し,その幾何学的特徴を表す射影変換行列を利用することで道路領域を抽出する.左右のステレオ画像の一方を射影変換し,もう一方の画像と差分画像及びSAD(Sum of Absolute Difference)を用いた検証をすることで道路を抽出する.基本処理である射影変換及び検証による道路領域抽出は計算量が多いため,専用ハードウェア化を行う.射影変換行列の推定では,主に …

    IPSJ SIG Notes 2006(62), 63-67, 2006-06-08

    CiNii Fulltext PDF - Open Access  References (5)

  • 17

    Processor Architecture for Road Extraction Based on Projective Transformation  [in Japanese]

    LEE Sunggae , HARIYAMA Masanori , KAMEYAMA Michitaka

    … で,道路が平面である点に着眼し,その幾何学的特徴を表す射影変換行列を利用することで道路領域を抽出する.左右のステレオ画像の一方を射影変換し,もう一方の画像と差分画像及びSAD(Sum of Absolute Difference)を用いた検証をすることで道路を抽出する.基本処理である射影変換及び検証による道路領域抽出は計算量が多いため,専用ハードウェア化を行う.射影変換行列の推定では,主に …

    Technical report of IEICE. ICD 106(92), 63-67, 2006-06-01

    CiNii Fulltext PDF - Subscription  References (5) Cited by (3)

  • 18

    Scalable VLSI Architecture for Variable Block Size Integer Motion Estimation in H.264/AVC(<Special Section>Selected Papers from the 18th Workshop on Circuits and Systems in Karuizawa)

    SONG Yang , LIU Zhenyu , GOTO Satoshi , IKENAGA Takeshi

    … Because of the data correlation in the motion estimation (ME) algorithm of H.264/AVC reference software, it is difficult to implement an efficient ME hardware architecture. …

    IEICE transactions on fundamentals of electronics, communications and computer sciences E89-A(4), 979-988, 2006-04-01

    CiNii Fulltext PDF - Subscription  References (13) Cited by (1)

  • 19

    Stereo Vision Processor Based on Window-Parallel-and-Pixel-Parallel Architecture  [in Japanese]

    YOKOYAMA Naoto , HARIYAMA Masanori , KOBAYASHI Yasuhiro , KAMEYAMA Michitaka

    ITE technical report 30(8), 43-46, 2006-01-26

    References (2)

  • 20

    Stereo Vision Processor Based on Window-Parallel-and-Pixel-Parallel Architecture  [in Japanese]

    YOKOYAMA Naoto , HARIYAMA Masanori , KOBAYASHI Yasuhiro , KAMEYAMA Michitaka

    リアルワールドの環境認識のためには, 高速かつ高信頼な3次元情報の取得が重要となる. 典型的な3次元計測の手法として画像間の対応付けに基づくステレオビジョンがある. 本稿では, 対応点探索の高信頼化と計算量減少を両立するアルゴリズムを提案する. 高信頼化のために, 複数のウィンドウサイズを用いて段階的に対応点の信頼性を高める. 計算量減少のために, 重複のないウィンドウを用いる. また, 演算器高 …

    Technical report of IEICE. ICD 105(569), 43-46, 2006-01-19

    CiNii Fulltext PDF - Subscription  References (2) Cited by (7)