TANAKA Toshimitsu

J-GLOBAL         Last updated: Nov 8, 2018 at 12:42
 
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Name
TANAKA Toshimitsu
Affiliation
Meijo University
Section
Faculty of Science and Technology Department of Information Sciences
Job title
Professor
Degree
Dr. of Engineering(Nagoya University)

Research Areas

 
 

Education

 
 
 - 
1984
Graduate School, Division of Information Engineering, Nagoya University
 
 
 - 
1982
Faculty of Engineering, Nagoya University
 

Published Papers

 
尾崎 尚人, 本多 信吾, 田中 敏光, 秋田 光平, 佐川 雄二
情報処理学会論文誌   59(8) 1511-1519   Aug 2018
角型スマートウォッチを対象として,ストロークジェスチャとタップを用いた,初心者が使いやすく画面占有率の低い文字入力手法を開発した.この手法では,50音表の行と段をこの順に指定することで平仮名1文字を入力する.行は画面の四隅のいずれかから始めるストロークジェスチャで指定する.このとき,画面の縁にはジェスチャを始める位置とジャスチャの形が表示される.表示はユーザの指の位置により変化するので,指示に従って指を動かせば,ジェスチャを覚えていなくても行を指定することができる.段はタップで指定する.タ...
Toshimitsu Tanaka,Takuya Mano,Yuuya Tanaka,Kohei Akita,Yuji Sagawa
Human-Computer Interaction. Interaction Technologies - 20th International Conference, HCI International 2018, Las Vegas, NV, USA, July 15-20, 2018, Proceedings, Part III   79-91   2018   [Refereed]
Kohei Akita,Toshimitsu Tanaka,Yuji Sagawa
Human-Computer Interaction. Interaction Technologies - 20th International Conference, HCI International 2018, Las Vegas, NV, USA, July 15-20, 2018, Proceedings, Part III   3-16   2018   [Refereed]
尾崎 尚人, 田中 敏光, 佐川 雄二
シンポジウムモバイル研究論文集   75-78   2017
秋田 光平, 田中 敏光, 佐川 雄二
シンポジウムモバイル研究論文集   67-73   2017
坂 香太朗, 田中 敏光, 佐川 雄二
シンポジウムモバイル研究論文集   61-66   2017
Tanaka Yuuya, Tanaka Toshimitsu, Sagawa Yuji
IEEJ Transactions on Sensors and Micromachines   137(2) 370-378   2017
<p>We developed a method for inputting characters by thumb gestures. The method is optimized to be used while holding the left and right ends of a tablet PC with hands. In this paper, one stroke means a movement of a certain distance to either dir...
Kubo Masataka, Tanaka Toshimitsu, Sagawa Yuji
IEEJ Transactions on Sensors and Micromachines   135(12) 1486-1492   2015
This paper presents a real-time method that simulates motion of snowflakes on a windshield. A few minutes after snowflakes attach on a windshield, the snowflakes start to slip down. And they reach to the bottom of the windshield, by repeating the ...
Takahashi Masashi, Tanaka Toshimitsu, Sagawa Yuji
IEEJ Transactions on Sensors and Micromachines   135(12) 1493-1500   2015
We proposed the method which generates ground texture by evaluating pressure applied at each point. The method standardizes diameter of clod to original size and its 1/2, 1/4, and 1/8 size, then defines condition of land by heft percentage of the ...
Fukuda Yasuhiro, Tanaka Toshimitsu, Sagawa Yuji
ITEJ   67(6) J163-J170   2013
A method of generating the textures of dirty floors is presented. First, the method computes the position and speed of each walker by simulating the behavior of the crowd. Then, footmarks caused by soil, dust, black grime on the floor and scratche...
TAKENAKA Tsuyoshi, TANAKA Toshimitu, SAGAWA Yuji
IEEJ Transactions on Sensors and Micromachines   132(4) 548-554   Apr 2012
Dirty floors and walls are commonly viewed in the place where many people walk over. Intensity of the grime increases in proportion to the number of people passing through the place. And pattern of the grime changes by the walking speed of the peo...
HIRANO Yousuke, TANAKA Toshimitsu, SAGAWA Yuji
IEEJ Transactions on Sensors and Micromachines   130(2) 351-357   Feb 2010
This paper presents a real-time method for generating various footprints in relation to state of walking. In addition, the method is expanded to cover both on hard floor and soft ground. Results of the previous method were not so realistic, becaus...
GOTO Yuu, TANAKA Tosimitu, SAGAWA Yuzi
IEEJ Transactions on Sensors and Micromachines   129(12) 2152-2158   Dec 2009
This research presents a method to display realistic flow of water drops on windshield in real time. The grid system well simulates irregular movements of the water drops on glass surfaces. Realistic shape of the water drops can be displayed by co...
GOTOU Yuu, TANAKA Toshimitsu, SAGAWA Yuji
IPSJ SIG Notes   2009(12) 19-24   Feb 2009
This research presents a method to display realistic flow of raindrops on windshield in real time. The grid system well simulates irregular movements of the water drops. The particle system is suitable to handle water pushed by windscreen wipers. ...
三嶋 仁, 田中 敏光, 佐川 雄二
情報処理学会論文誌   49(12) 4080-4087   Dec 2008
本論文では,グラフィックスハードウェアを使って,メタボールを直接リアルタイム表示する方法を提案する.提案手法は,レイキャストと同様に,視線上を等間隔に区切ったサンプル点でポテンシャルを計算する.ただし,ポテンシャルが存在しない場所で無駄な計算を行うことを避けるために,各粒子の最大影響範囲を表面とする球を包含する立方体を作成し,その視点側の半分を計算候補領域に選ぶ.そして,計算候補領域が不連続の場合には,Zバッファによる前後判定を使って次の計算候補領域にサンプル点を移動することで,効率的なサ...
KITANI Keisuke, TANAKA Toshimitsu, SAGAWA Yuji
IEEJ Transactions on Sensors and Micromachines   128(12) 1735-1740   Dec 2008
To display the break of paper, we propose the new method for calculating transformation of paper and for representing a minute structure of paper. Paper is defined as a &ldquo;spring-mass&rdquo; cubic mesh model. And, to express the flow of the pa...
三嶋 仁, 田中 敏光, 佐川 雄二
情報処理学会論文誌 論文誌ジャーナル   49(12) 4080-4087   Dec 2008
IWASA Kazumasa, TANAKA Toshimitsu, SAGAWA Yuji, SUGIE Noboru
IEEJ Transactions on Sensors and Micromachines   127(3) 338-344   Mar 2007
An increase in the number of parking lots is very slow though that of cars increases much every year. Thus, efficient management of parking lots is needed. If information of vacant divisions is transmitted to cars waiting at gates of parking lots,...
ISOZUMI Takuya, TANAKA Toshimitsu, SAGAWA Yuji, SUGIE Noboru
ITEJ   60(4) 538-544   Apr 2006
To display realistic water drops on glass surfaces, we added a new method, that controls the shape change of water drops, to the conventional motion control method. The shape of a water drop was defined as a sphere or a metaball in the conventiona...
TAKEUCHI Toshinori, TANAKA Toshimitu, SAGAWA Yuji, SUGIE Noboru
IEEJ Transactions on Sensors and Micromachines   125(12) 1805-1811   Dec 2005
In a city, roadside trees are regularly pruned. The pruning also not only changes the shape of the trees immediately but also changes subsequent growth of them. In addition, artificial illumination, which is caused by the light coming in through w...
TAKEUCHI Toshinori, TANAKA Toshimitsu, SUGIE Noboru
The IEICE transactions on information and systems Pt. 2   88(5) 906-915   May 2005
本研究では, VRや3Dゲームなどのインタラクティブシステムで足跡による床面汚れを実時間表現する手法を提案する.この方法では, 対話操作中は, データ更新を速くするため, 足跡を足型のテクスチャを貼り付けた長方形ポリゴンで表現して移動経路に沿って動的に配置する.ただし, 時間経過とともに描画しなければならないポリゴンが増えるので, 場面転換などの操作が中断するタイミングで, それまでの床面テクスチャに足跡を重ねがきすることで, 描画コストのかからないテクスチャによる表現に変換する.広範囲を...
TAUCHI Makiko, SAGAWA Yuji, TANAKA Toshimitsu, SUGIE Noboru
IEEJ Transactions on Sensors and Micromachines   124(12) 2475-2481   Dec 2004
Simulation studies were carried out about a group of self-autonomous mobile robots collaborating in collection cleaning-up tasks. The robots are endowed with two kinds of human-like personalities; positivity and tenderness. Dependent on the rank o...
UCHIDA Kazuhiro, TANAKA Toshimitsu, SUGIE Noboru
IEEJ Transactions on Fundamentals and Materials   124(11) 954-960   Nov 2004
The nighttime visibility of LED type outdoor display gets deteriorated due to the glare in the case of high luminance, while in the case of low luminance the visibility is enhanced, but not very conspicuous. The glare is caused by the high contras...
ITO Hirotaka, TANAKA Toshimitsu, SUGIE Noboru
Transactions of the Japanese Society for Artificial Intelligence   18 161-164   Nov 2003
In order to realize advanced man-machine interfaces, it is desired to develop a system that can infer the mental state of human users and then return appropriate responses. As the first step toward the above goal, we developed a system capable of ...
BANNO Hiroshi, TANAKA Toshimitsu, SUGIE Noboru
IEEJ Transactions on Electronics, Information and Systems   123(1) 165-166   Jan 2003
In the study by Yasuda et al., a basic scheme of subjective contour extraction was proposed. It succeeded in extracting subjective contours from relatively simple figures. However, the scheme when applied to the figure of a subjective zebra agains...
OTA Atsushi, TANAKA Toshimitsu, OHNISHI Noboru
The Transactions of the Institute of Electrical Engineers of Japan. C   121(12) 1834-1843   Dec 2001
TANAKA Toshimitsu, MATSUI Kentaro, AGATA Masato, HIRANO Kazushi, YOSHIOKA Masahiro, OHNISHI Noboru
IEEJ transactions on electronics, infromation and systems   120(1) 88-97   Jan 2000
Yongmei Liu 0005,Toshimitsu Tanaka,Tsuyoshi Yamamura,Noboru Ohnishi
Proceedings 1999 IEEE/RSJ International Conference on Intelligent Robots and Systems. Human and Environment Friendly Robots with High Intelligence and Emotional Quotients, October 17-21,1999, Hyundai Hotel, Kyongju, Korea   610-616   1999   [Refereed]
IWASE Masaki, YAMAMURA Tsuyoshi, TANAKA Toshimitsu, OHNISHI Noboru
The Transactions of the Institute of Electronics,Information and Communication Engineers.   81(6) 1224-1232   Jun 1998
映り込み現象は身の周りに多く存在する.しかし, 映り込み映像はコンピュータビジョンの分野では, そのアルゴリズムの適用を妨げるため, 多くの場合望まれない現象となっている.本論文では, 透明物体または不透明物体に映り込んだ映像を, 映り込み映像と映り込み除去映像とにオンラインで分離するカメラシステムを提案する.一般に, 鏡面反射光(映り込み)は偏光の度合いが強いが, 拡散反射光や透過光(映り込み以外)は偏光しない, あるいは偏光の度合いが弱いので, この光の偏光という情報を利用して, 映り...
Toshimitsu Tanaka,Noboru Ohnishi
Comput. Graph. Forum   16(3) 253-260   1997   [Refereed]
Toshimitsu Tanaka,Tokiichiro Takahashi
Comput. Graph. Forum   16(3) 231-240   1997   [Refereed]
Toshimitsu Tanaka,Tokiichiro Takahashi
Systems and Computers in Japan   26(11) 26-37   1995   [Refereed]
Toshimitsu Tanaka,Tokiichiro Takahashi
Comput. Graph. Forum   14(3) 205-216   1995   [Refereed]
Toshimitsu Tanaka,Tokiichiro Takahashi
Comput. Graph. Forum   13(3) 467-376   1994   [Refereed]
TANAKA Toshimitsu, TAKAHASHI Tokiichiro
IPSJ Journal   33(4) 471-480   Apr 1992
多くの物体の稜線や頂点は微小な曲面でできているこれら曲率の大きな曲面には広い範囲の光源が映り込むため ハイライトが発生することが多いハイライトは立体形状を認識する有力な手がかりとなるコンピュータグラフィックスで写実的な画像を生成するには 正確なハイライト描画が不可欠である丸められた稜線や頂点を細いポリゴンや微小なポリゴンで近似すると これらのポリゴンは画素に比べ小さく かつ法線の変化が大きいこのため Zバッファ法のようなサンプリング手法でレンダリングするとエリアシングが発生する本論文では ...
Toshimitsu Tanaka,Tokiichiro Takahashi
The Visual Computer   8(5&6) 315-326   1992   [Refereed]
Yoshiyasu Takefuji,Toshimitsu Tanaka,Kuo Chun Lee
IEEE Trans. Systems, Man, and Cybernetics   22(2) 332-336   1992   [Refereed]
TANAKA TOSHIMITSU, TAKAHASHI TOKIICHIRO
IPSJ Journal   32(11) 1383-1391   Nov 1991
計算機を用いて写実的な画像を生成することはCGの重要な課題の一つである日常的に使われている光源の多くは固有の大きさを持つ面光源である現実的な照明条件の下で画像を生成するには 面光源で照らされた物体の反射を正確に求める必要がある面光源はサンプリングにより点光源の集合で近似できるが 点光源数が十分でないとエリアシングが生じるエリアシングを完全に除去するには面光源による照度を解析的に求める必要がある物体の反射特性は 一般に 拡散反射成分と鏡面反射成分とに分けることができるこのうろ 拡散反射成分の...
TANAKA TOSHIMITSU, TAKAHASHI TOKIICHIRO
IPSJ Journal   32(2) 197-205   Feb 1991
エリアシングは画質を劣化させる大きな要因であり その除去はコンピュータグラフィックスの重要な課題であるエリアリングは 画素内に投影される物体の面積を精密に求めることで減少できる本論文では 画面を画素の水平境界で走査した後で2本の隣合う水平走査線の間を1画素の長さだけ垂直方向に走査する直交スキャンライン法を提案する直交スキャンライソ法は1画素内のポリゴンの面積を正確に求めることができるこのため 高度のアンチ・エリアシングが可能である画像生成実験により エッジの方向に依存しないアンチ・エリアシ...
Toshimitsu Tanaka,Seiichiro Naito,Tokiichiro Takahashi,Isao Masuda
Systems and Computers in Japan   20(3) 13-21   1989   [Refereed]
Toshimitsu Tanaka,Seiichiro Naito,Tokiichiro Takahashi
The Visual Computer   5(1&2) 83-94   1989   [Refereed]

Misc

 
瀧口 智史, 田中 敏光, 佐川 雄二
研究報告ヒューマンコンピュータインタラクション(HCI)   2010(11) 1-6   Oct 2010
Web カメラとクレジットカード大の矩形物体を使って,モバイル環境で,片手で文字入力とポインタ操作を行うシステムを作成する.文字はカード上の親指の位置と動きで入力するが,1 文字を 50 音表の行と段の 2 ステップで入力することで指が動く範囲を限定する.ポインタは腕の動きで操作する.ポインタを視野内のカードの位置と同期させることで,ジェスチャで直感的に移動できる.この 2 つのモードは,腕の伸縮により,瞬時に切り替えることができる.In this paper, we propose th...
Imazu Tomokuni, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   2013    Mar 2013
瀧口 智史, 田中 敏光, 佐川 雄二
研究報告ユビキタスコンピューティングシステム(UBI)   2010(11) 1-6   Oct 2010
Web カメラとクレジットカード大の矩形物体を使って,モバイル環境で,片手で文字入力とポインタ操作を行うシステムを作成する.文字はカード上の親指の位置と動きで入力するが,1 文字を 50 音表の行と段の 2 ステップで入力することで指が動く範囲を限定する.ポインタは腕の動きで操作する.ポインタを視野内のカードの位置と同期させることで,ジェスチャで直感的に移動できる.この 2 つのモードは,腕の伸縮により,瞬時に切り替えることができる.In this paper, we propose th...
Ito Kenta, Achiha Masahiko, Tanaka Toshimitsu
Proceedings of the IEICE General Conference   2013(2)    Mar 2013
TAKENAKA Tsuyoshi, TANAKA Toshimitsu, SAGAWA Yuji
研究報告グラフィクスとCAD(CG)   2010(1) 1-6   Jul 2010
駅構内や学校の廊下などの多人数が恒常的に使用する場所では,その場所を通過する人の速度や数により,汚れの濃さが変化する.そこで本研究では,仮想空間に通路を設定して,人どうしや人や壁との相互干渉を考慮した群集の移動シミュレーション行うことで,各個体の移動経路を求める.そして,移動経路に沿って移動速度や歩幅を考慮した足跡をつけることで,床面の汚れを生成する.また,壁ぎわを通過する個体については,人体や持ち物が壁に接触することで生じる汚れを計算し,壁に付加する.こうすることで,床面や壁面の汚れをリ...
Yashi Keisuke, Achiha Masahiko, Tanaka Toshimitu
Proceedings of the IEICE General Conference   2013(2)    Mar 2013
SUGIURA Tsukasa, TANAKA Toshimitsu, SAGAWA Yuji, TESHIMA Yuji
研究報告グラフィクスとCAD(CG)   2010(5) 1-6   Jul 2010
一般に類似画像検索では,画像に様々な処理を施して抽出した特徴を比較している.しかし,画像から特徴量を抽出する処理には多くのコストがかかるため,対象とする画像が多数になると検索時間がかかりすぎる問題がある.本研究では,特徴抽出に GPU を活用することで類似画像検索の処理時間の短縮を図る.モルフォロジー演算を用いる特徴抽出処理を GPU(GeForce GTX285) に実装した場合,CPU(Core i7 920) で実行した場合に比べて類似画像検索全体で約 3 倍の高速化が見込める.Th...
Tsuji Takumi, Achiha Masahiko, Tanaka Toshimitsu
Proceedings of the IEICE General Conference   2013(2)    Mar 2013
Murai Motohiro, Sagawa Yuji, Tanaka Toshimitsu
情報科学技術フォーラム一般講演論文集   6(2) 221-222   Aug 2007
Okazaki Kazuo, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   2013(2)    Mar 2013
Yajima Kenji, Sagawa Yuji, Tanaka Toshimitsu
情報科学技術フォーラム一般講演論文集   6(2) 247-248   Aug 2007
Shibata Yuki, Tanaka Toshimitu, Sagawa Yuji
Proceedings of the IEICE General Conference   2013(1)    Mar 2013
Mishima Hitoshi, Tanaka Toshimitsu, Sagawa Yuji
情報科学技術フォーラム一般講演論文集   6(3) 211-212   Aug 2007
Fukuda Yasuhiro, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   2013(1)    Mar 2013
Noda Akihiro, Tanaka Toshimitsu, Sagawa Yuji
情報科学技術フォーラム一般講演論文集   6(3) 235-236   Aug 2007
SHIBATA Yuki, TANAKA Toshimitsu, SAGAWA Yuji
PROCEEDINGS OF THE ITE WINTER ANNUAL CONVENTION   2013(0) 3-1-1-_3-1-2_   2013
The proposed method inputs characters by touch gestures. Each gesture is defined by motions sliding index finger along edge of the display of a micro size touch device. Start position and length of the gestures are optimized to the romaji input. T...
Kitani Keisuke, Tanaka Toshimitu, Sagawa Yuji
情報科学技術フォーラム一般講演論文集   6(3) 319-320   Aug 2007
FUKUDA Yasuhiro, TANAKA Toshimitsu, SAGAWA Yuji
PROCEEDINGS OF THE ITE WINTER ANNUAL CONVENTION   2013(0) 3-2-1-_3-2-2_   2013
Our method is designed to input characters without seeing input device by one hand. Each character is specified by a touch gesture, which is a combination of vertical and horizontal movement of a thumb. Position of the thumb is ignored. Input guid...
Hirano Yousuke, Tanaka Toshimitsu, Sagawa Yuji
情報科学技術フォーラム一般講演論文集   6(3) 385-386   Aug 2007
OKAZAKI Shinichiro, OHNISHI Noboru, TANAKA Toshimitsu, SUGIE Noboru
IEICE technical report   107(57) 53-58   May 2007
We propose a novel method for estimating 3D human pose from silhouette image. The proposed method includes two major parts: obtaining candidate poses and then re-ranking them. For a query image, a certain number of candidate poses are retrieved ef...
Yajima Kenji, Sagawa Yuji, Tanaka Toshimitsu
Proceedings of the IEICE General Conference   2007(1)    Mar 2007
Murai Motohiro, Sagawa Yuji, Tanaka Toshimitsu
Proceedings of the IEICE General Conference   2007(1)    Mar 2007
Komeda Tomoki, Tanaka Tosimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   2007(1)    Mar 2007
Kawai Makoto, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   2007(1)    Mar 2007
Kitani Keisuke, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   2007(2)    Mar 2007
Mishima Hitoshi, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   2007(2)    Mar 2007
Noda Akihiro, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   2007(2)    Mar 2007
CAO Hui, OHNISHI Noboru, TANAKA Toshimitsu, SUGIE Noboru
IEICE technical report   106(540) 53-58   Feb 2007
We propose a novel method for estimating 3D human pose from silhouette image. The proposed method includes two major parts: obtaining candidate poses and then re-ranking them. For a query image, a certain number of candidate poses are retrieved ef...
Isozumi Takuya, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference      2007
UCHIDA Kazuhiro, TANAKA Toshimitsu, SUGIE Noboru
電気学会研究会資料. ITS, ITS研究会   2006(13) 25-30   Jun 2006
ASAHI Kensaku, SAGAWA Yuji, TANAKA Toshimitsu, SUGIE Noboru, OGAWA Akira
情報理論とその応用シンポジウム予稿集 = The proceedings of the Symposium on Information Theory and Its Applications   27(2) 711-714   Dec 2005
ASAHI Kensaku, SAGAWA Yuji, TANAKA Toshimitsu, SUGIE Noboru, OGAWA Akira
Proceedings of the IEICE General Conference   2005 "S-56"   Mar 2005
Yusuke Ishida,Toshimitsu Tanaka,Noboru Sugie,Yuji Sagawa
Proceedings of the IAPR Conference on Machine Vision Applications (IAPR MVA 2005), May 16-18, 2005, Tsukuba Science City, Japan   249-252   2005   [Refereed]
CAO Hui, TANAKA Toshimitsu, OHNISHI Noboru, SUGIE Noboru
IEICE technical report. Image engineering   104(192) 19-23   Jul 2004
We proposed a new approach to recovering human pose from a static image via optimal candidate pose decision. It includes two steps: generating candidate poses and deciding the most probable one. For a given image input, a set of candidate poses ar...
CAO Hui, TANAKA Toshimitsu, OHNISHI Noboru, SUGIE Noboru
Technical report of IEICE. Multimedia and virtual environment   104(196) 19-23   Jul 2004
We proposed a new approach to recovering human pose from a static image via optimal candidate pose decision. It includes two steps: generating candidate poses and deciding the most probable one. For a given image input, a set of candidate poses ar...
CAO Hui, TANAKA Toshimitsu, OHNISHI Noboru, SUGIE Noboru
Technical report of IEICE. PRMU   104(194) 19-23   Jul 2004
We proposed a new approach to recovering human pose from a static image via optimal candidate pose decision. It includes two steps: generating candidate poses and deciding the most probable one. For a given image input, a set of candidate poses ar...
UCHIDA Kazuhiro, TANAKA Toshimitsu, SUGIE Noboru
電気学会研究会資料. TER, 交通・電気鉄道研究会   2004(10) 43-50   Mar 2004
UCHIDA Kazuhiro, TANAKA Toshimitsu, SUGIE Noboru
情報処理学会研究報告高度交通システム(ITS)   2004(19) 107-114   Mar 2004
In highways, accidental collisions against the rear-end of maintenance vehicles occur often due to the driver's delay of the discovery of the maintenance vehicles. Many of accidents occur in the nighttime. If drivers can recognize the presence of ...
UCHIDA Kazuhiro, TANAKA Toshimitsu, SUGIE Noboru
電子情報通信学会技術研究報告. ITS   103(673) 43-50   Feb 2004
In highways, accidental collisions against the rear-end of maintenance vehicles occur often due to the driver's delay of the discovery of the maintenance vehicles. Many of accidents occur in the nighttime. If drivers can recognize the presence of ...
Makiko Tauchi,Yuji Sagawa,Toshimitsu Tanaka,Noboru Sugie
2004 IEEE/RSJ International Conference on Intelligent Robots and Systems, Sendai, Japan, September 28 - October 2, 2004   388-393   2004   [Refereed]
YAMAMOTO K., UCHIDA K., SAGAWA Y., TANAKA T., SUGIE N.
電子情報通信学会技術研究報告. ITS   102(233) 47-52   Jul 2002
In this article, the motion after-effect(MAE) is treated, which takes place when one drives on a highway for a while. One's sensitivity to motion in the direction of moving stimulation is reduced, resulting in misjudgments of cruising speed and so...
HSU Chihping, TANAKA Toshimitsu, SUGIE Noboru, UEDA Kouzi
電子情報通信学会技術研究報告. ITS   102(233) 37-42   Jul 2002
We propose a method of detecting the existence of parked vehicles by processing the image of a parking lot taken by a surveillance camera. Whenever we want to park a car at a parking lot, how to find a proper parking division there causes a seriou...
Masumura Akihito, Tanaka Toshimitsu, Ohnishi Noboru
Proceedings of the Society Conference of IEICE   2001    Aug 2001
OTA Atsushi, TANAKA Toshimitsu, OHNISHI Noboru
IPSJ SIG Notes   2000(115) 61-66   Dec 2000
This paper presents a method for generating camera work automatically in order to produce the attractive three-dimensional CG animation. This method is useful for supporting the design of the camera work. Virtual directors are defined each of whic...
IKUTA Daisuke, TANAKA Toshimitsu, HORIBA Isao, YAMAMOTO Shin, SUGIE Noboru
Technical report of IEICE. Multimedia and virtual environment   99(723) 19-24   Mar 2000
This paper presents a relief modeling systen in the virtual space. The systen consists of an interactive modeling environment and a shape conversion program. The interactive system provides several curving tools that simulate real relief modeling,...
HIRANO Kazumi, TANAKA Toshimitu, OHNISHI Noboru
Technical report of IEICE. PRMU   99(710) 97-104   Mar 2000
This paper presents a stable method for recovering three-dimensional motion of the human body from a single view with an motion model. The motion model memorizes a sequece of joint angles of the human body. Players in video streams trace the motio...
HIRANO Kazumi, TANAKA Toshimitu, OHNISHI Noboru
IEICE technical report. Natural language understanding and models of communication   99(708) 97-104   Mar 2000
This paper presents a stable method for recovering three-dimensional motion of the human body from a single view with an motion model. The motion model memorizes a sequence of joint angles of the human body. Players in video streams trace the moti...
ORYOJI Hiroshi, TANAKA Toshimitsu, TAKEUOHI Yoshinori, OHNISHI Noboru
PROCEEDINGS OF THE ITE WINTER ANNUAL CONVENTION   2000(0)    2000
LIU Yongmei, YAMAMURA Tsuyoshi, TANAKA Toshimitus, OHNISHI Noboru
Technical report of IEICE. HIP   99(453) 39-42   Nov 1999
In this paper, we describe an approach for estimating the orientation of a signboard relative to the camera from a single view and rectifying a distorted signboard image taken from a non-orthogonal viewing direction. First, signboards in scene ima...
KAWAMURA Kazunari, TANAKA Toshimitsu, OHNISHI Noboru
Technical report of IEICE. PRMU   98(677) 89-96   Mar 1999
In this paper, we propose a new approach for reconstructing existing architectures from some photographs for the landscape simulation. Stereo vision techniques are employed. For accurate shape reconstruction, two cameras must be located far each o...
KEAN Lim Jit, KUDO Hiroaki, YAMAMURA Tsuyoshi, TANAKA Toshimitsu, OHNISHI Noboru
Technical report of IEICE. PRMU   98(677) 97-104   Mar 1999
The realization of motion recognition has a wide range of application such as in man-machine interface and surveillance. Our work focuses on the classification of arm motion from monocular image sequence. As object motion can be characterized by i...
MIZUNO Takayuki, TANAKA Toshimitsu, OHNISHI Noboru
The Transactions of the Institute of Electrical Engineers of Japan. C   121(12) 1844-1852   Dec 2001
MIZUNO Yasuo, TANAKA Toshimitsu, OHNISH Noboru
Technical report of IEICE. PRMU   98(608) 25-32   Feb 1999
Most of display and printer can use at most a resolution scale fo 256 to describe RGB data of color images,thus there are limits in image reprenting ability. Some of image detail is hard to distinguish or may be lost. We propose image enhancement ...
HONAMI Daisuke, TANAKA Toshimitsu, OHNISH Noboru
IEICE technical report. Image engineering   98(575) 97-102   Feb 1999
Color variance by soil and dust is important for architectural simulation, so that their correct synthesis is necessary in order to improve reality of computer generated images, We thought soil and dust which generated by environment, frequency of...
Ota Atsushi, Tanaka Toshimitsu, Ohnishi Noboru
IEEJ Transactions on Sensors and Micromachines   121(12) 1834-1843   2001
This paper presents a computer system that automatically generates camera works for a scene with moving objects. Most realistic and attractive shots follow the common sense of camera control. Thus we implement each rule of the camera control as a ...
HONAMI Daisuke, TANAKA Toshimitsu, OHNISH Noboru
IEICE technical report. Electronic information displays   98(573) 97-102   Feb 1999
Color variance by soil and dust is important for architectural simulation, so that their correct synthesis is necessary in order to improve reality of computer generated images. We thought soil and dust which generated by environment, frequency of...
Mizuno Takayuki, Tanaka Toshimitsu, Ohnishi Noboru
IEEJ Transactions on Sensors and Micromachines   121(12) 1844-1852   2001
Spray Modeling System is a real-time interactive 3D modeling system that shaves and swells objects by spraying virtual particles onto their surfaces. Users can make holes and fill them with the same spraying operation. This system achieves the sim...
Honami Daisuke, Tanaka Toshimitsu, Ohnish Noboru
ITE Technical Report   23(0) 97-102   1999
Color variance by soil and dust is important for architectural simulation, so that their correct synthesis is necessary in order to improve reality of computer generated images. We thought soil and dust which generated by environment, frequency of...
Liu Yongmei, Yamamura Tsuyoshi, Tanaka Toshimitus, Ohnishi Noboru
ITE Technical Report   23(0) 39-42   1999
In this paper, we describe an approach for estimating the orientation of a signboard relative to the camera from a single view rectifying a distorted signboard image taken from a non-orthogonal viewing direction. First, signboards in scene images ...
水野 康生, 田中 敏光, 大西 昇
全国大会講演論文集   57(0) 113-114   Oct 1998
川村 和也, 田中 敏光, 大西 昇
全国大会講演論文集   57(0) 181-182   Oct 1998
穂浪 大輔, 田中 敏光, 大西 昇
全国大会講演論文集   57(0) 172-173   Oct 1998
NODA Yasuyuki, TANAKA Toshimitsu, OHNISHI Noboru
Technical report of IEICE. HIP   97(599) 23-30   Mar 1998
An interactive 3D modeling method is presented here. The method shaves and swells object surfaces by spraying virtual particles onto the surfaces. Therefore various shape modifications, from wide to narrow and/or sharp to rough, are available by c...
MATSUI Kentaro, HIRANO Kazumi, TANAKA Toshimitsu, OHNISHI Noboru
Technical report of IEICE. PRMU   97(595) 15-22   Mar 1998
In order to create more realistic soccer scene from TV images, we have developed an image synthesis system which generates an image sequence from the viewpoint of a player on the field. This system is based on the camera calibration theory. First,...
Kentaro Matsui,Masaki Iwase,Masato Agata,Toshimitsu Tanaka,Noboru Ohnishi
1998 Conference on Computer Vision and Pattern Recognition (CVPR '98), June 23-25, 1998, Santa Barbara, CA, USA   860-865   1998   [Refereed]
NODA Yasuyuki, TANAKA Toshimitsu, OHNISHI Noboru
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   72 7-12   May 1997
An interactive method is presented here for direct and simply 3D modeling. The method sprays particles onto object surfaces due to shave or swell the surfaces. It is a simulation of sandblast operations in virtual space. Various modifications of o...
UMEDA Shigeyuki, YAMAMURA Tsuyoshi, TANAKA Toshimitsu, OHNISHI Noboru, KUNO Minoru
Technical report of IEICE. PRMU   96(564) 39-46   Mar 1997
The piping parts are usually represented through one-view drawing. We have developed a system, which can produce part's projection (line drawing) to an arbitrary image plane from a drawing. The system analyzes a drawing described in vector data an...
IWASE Masaki, YAMAMURA Tsuyoshi, TANAKA Toshimitsu, OHNISHI Noboru
IEICE technical report. Image engineering   96(507) 69-76   Feb 1997
In computer vision, reflection on specular surface is sometimes an unexpected phenomenon, because overlapping images prevent us from applying standard vision algorithms. In this paper, we propose an on-line camera system for separating real images...
SHIRASAWA Toshiyuki, YAMAMURA Tsuyoshi, TANAKA Toshimitsu, OHNISHI Noboru
HIP   96(499) 79-84   Jan 1997
In this paper, we discriminated speaker's emotions in speech by multivariate analysis. We extracted prosody components, such as temporal structure, amplitude structure and pitch stricture, from 224 speech samples, representing suitably speaker's e...
Iwase Masaki, Yamamura Tsuyoshi, Tanaka Toshimitsu, Ohnishi Noboru
ITE Technical Report   21(0) 69-76   1997
In computer vision, reflection on specular surface is sometimes an unexpected phenomenon, because overlapping images prevent us from applying standard vision algorithms. In this paper, we propose an on-line camera system for separating real images...
TANAKA Toshimitsu, TANAKA Yuji, OHNISHI Noboru
IPSJ SIG Notes. CVIM   1996(115) 9-16   Nov 1996
This paper has presented a method which enhances images like paintings. Highlights and shadows increase image reality, however, since pixel intensity is over 256 in highlights and nearly zero in shadows, details in the areas can not be recognized....
Taniyama Masayuki, Tanaka Toshimitsu, Ohnishi Noboru
IEICE technical report. Pattern recognition and understanding   95(583) 115-122   Mar 1996
This paper presents a 3D shape generation method using a conceptual-model and a line drawing. The conceptual-model consists of simple shape elements, such as boxes and cylinders, and includes geometrical constraints between the elements. The model...
Noboru Ohnishi,Kenji Kumaki,Tsuyoshi Yamamura,Toshimitsu Tanaka
Computer Vision - ECCV'96, 4th European Conference on Computer Vision, Cambridge, UK, April 15-18, 1996, Proceedings, Volume II   636-646   1996   [Refereed]
MATSUI Kentaro, IWASE Masaki, TANAKA Toshimitu, OHNISHI Noboru
Proceedings of the Society Conference of IEICE      1996
筆者らは,サッカーの試合中継を画像処理し,プレイ中の選手から見たシーンをCGで生成するシステムを提案した.このシステムは,静止画像を対象とし,キャリブレーションや選手抽出に際して,人間の補助を必要としている.本研究は,対象を動画像まで拡張するために,上記の処理を自動化したものである.自動化を可能にした手法と,システムの概要について報告する.
Kumaki Kenji, Yamamura Tsuyoshi, Tanaka Toshimitsu, Ohnishi Noboru
IPSJ SIG Notes   1995(108) 31-37   Nov 1995
This paper proposes a method for separating real objects behind glass and virtual ones reflected on it. Generally speaking. light is more polarized when reflected on glass than when transmitted through it. This optical property allows us to elimin...
Iwase Masaki, Tanaka Toshimitsu, Ohnishi Noboru
IEICE technical report. Pattern recognition and understanding   133-138   1995
Image synthesis system has been proposed. It uses a single picture of a soccer game. Firstly the system determines camera parameters of the picture by using white lines drawn on the soccer ground. Then, it recovers players' positions. As the resul...
Shirasawa Toshiyuki, Tanaka Toshimitsu, Ohnishi Noboru
Proceedings of the Society Conference of IEICE      1995
金属,ガラス,木,石,布地,生物の皮革などの質感をコンピュータグラフィックス(CG)で表現する研究が盛んに行なわれている.しかし,これらの多くは素材そのものの質感表現手法であり,汚れや傷などの生活感を表現する研究はあまり行なわれていない.景観シミュレーションでは写真のマッピングで路面の質感を表示することが一般的である.このため,建設されてからの時間や道路の使用状態による経年変化は考慮されず,単調で現実感の乏しい路面となっている.そこで,生活感のあるCG画像生成の第一歩として,建設されてから...
田中 敏光, 高橋 時市郎
全国大会講演論文集   47(0) 329-330   Sep 1993
画像生成過程で視点や物体の移動は行わないが、照明を移動したり、質感パラメータを変更すると言った試行錯誤はしばしば行われる。このような場合、隠れ面消去結果をバッファに保存しておけば、レンダリングだけを再実行することで画像生成時間を短縮できる。このアイデアはSpan buffer、光線追跡木、G-buffers等により実現されているが、これらのバッファは物体を量子化して保存しているので、エリアシングの発生を避けることができない。量子化によるエリアシングは画像を拡大表示すると顕著になる。また、拡...
野田 靖之, 田中 敏光, 大西 昇
情報処理学会研究報告ヒューマンコンピュータインタラクション(HCI)   1997(43) 7-12   May 1997
本報告では,吹き付け加工の模倣による直感的なモデリング手法を提案する.この方法は仮想空間に置いたスプレーから物体に粒子を吹き付けることで物体の加工を行うもので,吹き付ける範囲や粒子の量,分布を変えることで大まかな加工も詳細な加工も行える.このため,スプレーを動かすという単純な操作だけで,さまざまな形状をモデリングできる.提案手法では物体とスプレーは接触しないので,粘土細工や彫刻を模倣する手法で求められる力感のフィードバックは必要としない.また作業面を限定することで,マウスなどの2次元ポイン...
田中 敏光, 高橋 時市郎, 増田 功
全国大会講演論文集   33(0) 1621-1622   Oct 1986
最近CGによる画像生成が盛んになってきた。しかし、CSG(Constructive Solid Geometry)等現在使われている形状入力技術では、複雑な曲面を持った形状を入力するには、多くの労力と時間が必要である。そこで、曲面が簡便に入力でき、直感的に理解しやすい形状入力法が望まれている。我々は、物体がGeneralized Symmetryの性質を持つと仮定することにより、正射影像と付加情報から三次元形状を復元する原理を提案した。その適用例として、スケッチを用いて三次元曲面形状を復元...
TANAKA TOSHIMITSU, SUGIHARA KOKICHI, SUGIE NOBORU
IPSJ Journal   26(1) 104-111   Jan 1985
人間同士で形状情報を伝達する場合には 図でだいたいの形を表し そこに長さ・角度等の寸法指定情報を与えて形状を一義的に決定する という方法をよく使う.そこで この方法により計算機に形状が入力できれば 正確な座標値などを直接入力する方法と比べて 人間にとってずっと苦痛の少ない入力方法になるであろう.このとき問題となるのは 与えられた寸法指定情報が適正か否かということである.従来この問題は 形状を決定するために寸法指定情報に過不足がないか否かの観点から論じられてきた.しかし 実際に寸法指定情報を...

Conference Activities & Talks

 
D-9-41 Character input by gesture of thumb
Fukuda Yasuhiro, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   5 Mar 2013   
D-9-38 Character input method that assumes a tiny touch device
Shibata Yuki, Tanaka Toshimitu, Sagawa Yuji
Proceedings of the IEICE General Conference   5 Mar 2013   
D-11-87 Evaluation of concentration level o f students from facial images
Okazaki Kazuo, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   5 Mar 2013   
D-11-82 Imaging System Using Kinect with Consideration of Forward Viewpoint Image Generation
Tsuji Takumi, Achiha Masahiko, Tanaka Toshimitsu
Proceedings of the IEICE General Conference   5 Mar 2013   
D-11-43 Individual Model Creation By Using Depth Image
Yashi Keisuke, Achiha Masahiko, Tanaka Toshimitu
Proceedings of the IEICE General Conference   5 Mar 2013   
3-2 Character input method by touch-gesture of one thumb
FUKUDA Yasuhiro, TANAKA Toshimitsu, SAGAWA Yuji
PROCEEDINGS OF THE ITE WINTER ANNUAL CONVENTION   2013   
Our method is designed to input characters without seeing input device by one hand. Each character is specified by a touch gesture, which is a combination of vertical and horizontal movement of a thumb. Position of the thumb is ignored. Input guid...
3-1 Character input method optimized to micro touch devices
SHIBATA Yuki, TANAKA Toshimitsu, SAGAWA Yuji
PROCEEDINGS OF THE ITE WINTER ANNUAL CONVENTION   2013   
The proposed method inputs characters by touch gestures. Each gesture is defined by motions sliding index finger along edge of the display of a micro size touch device. Start position and length of the gestures are optimized to the romaji input. T...
E-035 Automatic Blog Classification System Using the Support Vector Machine
Murai Motohiro, Sagawa Yuji, Tanaka Toshimitsu
情報科学技術フォーラム一般講演論文集   22 Aug 2007   
E-046 The system that collects and classifies explanation of term
Yajima Kenji, Sagawa Yuji, Tanaka Toshimitsu
情報科学技術フォーラム一般講演論文集   22 Aug 2007   
I-007 Real-time rendering of particles with the interaction by using GPU
Mishima Hitoshi, Tanaka Toshimitsu, Sagawa Yuji
情報科学技術フォーラム一般講演論文集   22 Aug 2007   
D-11-32 Random Noise Reduction using Automatic Coefficient Adjustment Scheme for NL-means
Ito Kenta, Achiha Masahiko, Tanaka Toshimitsu
Proceedings of the IEICE General Conference   5 Mar 2013   
I-019 Three Dimensional Modeling by Scratch Interface
Noda Akihiro, Tanaka Toshimitsu, Sagawa Yuji
情報科学技術フォーラム一般講演論文集   22 Aug 2007   
I-055 CG Expression of Paper Tearing
Kitani Keisuke, Tanaka Toshimitu, Sagawa Yuji
情報科学技術フォーラム一般講演論文集   22 Aug 2007   
I-084 Real time generation of the footprint which reflected a difference of how to walk
Hirano Yousuke, Tanaka Toshimitsu, Sagawa Yuji
情報科学技術フォーラム一般講演論文集   22 Aug 2007   
Expression of indoor grime by human walk
TAKENAKA Tsuyoshi, TANAKA Toshimitsu, SAGAWA Yuji
研究報告グラフィクスとCAD(CG)   9 Jul 2010   
駅構内や学校の廊下などの多人数が恒常的に使用する場所では,その場所を通過する人の速度や数により,汚れの濃さが変化する.そこで本研究では,仮想空間に通路を設定して,人どうしや人や壁との相互干渉を考慮した群集の移動シミュレーション行うことで,各個体の移動経路を求める.そして,移動経路に沿って移動速度や歩幅を考慮した足跡をつけることで,床面の汚れを生成する.また,壁ぎわを通過する個体については,人体や持ち物が壁に接触することで生じる汚れを計算し,壁に付加する.こうすることで,床面や壁面の汚れをリ...
Similar Image Retrieval accelerated by using GPUs
SUGIURA Tsukasa, TANAKA Toshimitsu, SAGAWA Yuji, TESHIMA Yuji
研究報告グラフィクスとCAD(CG)   9 Jul 2010   
一般に類似画像検索では,画像に様々な処理を施して抽出した特徴を比較している.しかし,画像から特徴量を抽出する処理には多くのコストがかかるため,対象とする画像が多数になると検索時間がかかりすぎる問題がある.本研究では,特徴抽出に GPU を活用することで類似画像検索の処理時間の短縮を図る.モルフォロジー演算を用いる特徴抽出処理を GPU(GeForce GTX285) に実装した場合,CPU(Core i7 920) で実行した場合に比べて類似画像検索全体で約 3 倍の高速化が見込める.Th...
System to input characters and positions by one-hand action captured with web camera
瀧口 智史, 田中 敏光, 佐川 雄二
研究報告ヒューマンコンピュータインタラクション(HCI)   22 Oct 2010   
Web カメラとクレジットカード大の矩形物体を使って,モバイル環境で,片手で文字入力とポインタ操作を行うシステムを作成する.文字はカード上の親指の位置と動きで入力するが,1 文字を 50 音表の行と段の 2 ステップで入力することで指が動く範囲を限定する.ポインタは腕の動きで操作する.ポインタを視野内のカードの位置と同期させることで,ジェスチャで直感的に移動できる.この 2 つのモードは,腕の伸縮により,瞬時に切り替えることができる.In this paper, we propose th...
A-16-6 Visual simulation of dirty floors caused by various walking
Imazu Tomokuni, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   5 Mar 2013   
A Highly Parallel Processor IMAPCAR and Its Application to In-vehicle Image Recognition Systems
OKAZAKI Shinichiro, OHNISHI Noboru, TANAKA Toshimitsu, SUGIE Noboru
IEICE technical report   17 May 2007   
We propose a novel method for estimating 3D human pose from silhouette image. The proposed method includes two major parts: obtaining candidate poses and then re-ranking them. For a query image, a certain number of candidate poses are retrieved ef...
D-4-1 The system that collects and classifies explanation of term
Yajima Kenji, Sagawa Yuji, Tanaka Toshimitsu
Proceedings of the IEICE General Conference   7 Mar 2007   
D-4-5 Automatic blog classification system
Murai Motohiro, Sagawa Yuji, Tanaka Toshimitsu
Proceedings of the IEICE General Conference   7 Mar 2007   
D-15-1 Evaluating Concentration of Students Using Images and Instruction Information
Komeda Tomoki, Tanaka Tosimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   7 Mar 2007   
D-15-5 3D Modeling system for kids simulating toy blocks with dual mouse interface
Kawai Makoto, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   7 Mar 2007   
D-11-109 CG Representation of Paper Tearing
Kitani Keisuke, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   7 Mar 2007   
D-12-49 Real-time visualization of particles with interaction by using GPU
Mishima Hitoshi, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   7 Mar 2007   
D-12-132 Three dimensional modeling system with scratch interface
Noda Akihiro, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   7 Mar 2007   
Estimating 3D Human Pose from Silhouette Image using Approximate Chamfer Distance and Kernel Subspace
CAO Hui, OHNISHI Noboru, TANAKA Toshimitsu, SUGIE Noboru
IEICE technical report   15 Feb 2007   
We propose a novel method for estimating 3D human pose from silhouette image. The proposed method includes two major parts: obtaining candidate poses and then re-ranking them. For a query image, a certain number of candidate poses are retrieved ef...
D-12-47 CG Animation of Waterdrops that Flow on Glass Surfaces : Improvement of Representation for Shape
Isozumi Takuya, Tanaka Toshimitsu, Sagawa Yuji
Proceedings of the IEICE General Conference   2007   
Study of the Character Fonts for the Road Information Signboards Using a Vision Simulator
UCHIDA Kazuhiro, TANAKA Toshimitsu, SUGIE Noboru
電気学会研究会資料. ITS, ITS研究会   20 Jun 2006   
A Noise Reduction Method for Speech Signals Using the Spectrogram
ASAHI Kensaku, SAGAWA Yuji, TANAKA Toshimitsu, SUGIE Noboru, OGAWA Akira
情報理論とその応用シンポジウム予稿集 = The proceedings of the Symposium on Information Theory and Its Applications   14 Dec 2005   
Heart Rate Variability in Care-required Aged Patients in Dental Practice
KIM Barkhwa, MISAKI Toru, HORIE Nobuyuki, SUZUKI Kiyoshi, WATANABE Takeyuki, NAKAGAWA Taneaki, ONO Hiroyasu, TAKAOKA Keita, NEMOTO Akira, TANAKA Toshimitsu
老年歯科医学 = Japanese journal of gerodontology   30 Jun 2005   
AS-2-6 A Noise Reduction Scheme for Speech Signals Using Spectrogram
ASAHI Kensaku, SAGAWA Yuji, TANAKA Toshimitsu, SUGIE Noboru, OGAWA Akira
Proceedings of the IEICE General Conference   7 Mar 2005   
Static Image Based Human Pose Recovery by Optimal Candidate Decision
CAO Hui, TANAKA Toshimitsu, OHNISHI Noboru, SUGIE Noboru
IEICE technical report. Image engineering   9 Jul 2004   
We proposed a new approach to recovering human pose from a static image via optimal candidate pose decision. It includes two steps: generating candidate poses and deciding the most probable one. For a given image input, a set of candidate poses ar...
UCHIDA Kazuhiro, TANAKA Toshimitsu, SUGIE Noboru
電気学会研究会資料. TER, 交通・電気鉄道研究会   2 Mar 2004   
In highways, accidental collisions against the rear-end of maintenance vehicles occur often due to the driver's delay of the discovery of the maintenance vehicles. Many of accidents occur in the nighttime. If drivers can recognize the presence of ...
Improving Nighttime Visibility of LED Type Variable Signbords for Highway Maintenance Vehicle
UCHIDA Kazuhiro, TANAKA Toshimitsu, SUGIE Noboru
電子情報通信学会技術研究報告. ITS   24 Feb 2004   
In highways, accidental collisions against the rear-end of maintenance vehicles occur often due to the driver's delay of the discovery of the maintenance vehicles. Many of accidents occur in the nighttime. If drivers can recognize the presence of ...
Robust Detection of Vehicles in a Parking Lot with Illumination Change by Image Processing
HSU Chihping, TANAKA Toshimitsu, SUGIE Noboru, UEDA Kouzi
電子情報通信学会技術研究報告. ITS   18 Jul 2002   
We propose a method of detecting the existence of parked vehicles by processing the image of a parking lot taken by a surveillance camera. Whenever we want to park a car at a parking lot, how to find a proper parking division there causes a seriou...
Quantitative Measurements of Driver's Motion After Effect Characteristics Searching for the Reduction Method
YAMAMOTO K., UCHIDA K., SAGAWA Y., TANAKA T., SUGIE N.
電子情報通信学会技術研究報告. ITS   18 Jul 2002   
In this article, the motion after-effect(MAE) is treated, which takes place when one drives on a highway for a while. One's sensitivity to motion in the direction of moving stimulation is reduced, resulting in misjudgments of cruising speed and so...
Chihping Hsu,Toshimitsu Tanaka,Noboru Sugie,Kouzi Ueda
Proceedings of the IAPR Conference on Machine Vision Applications (IAPR MVA 2002), December 11-13, 2002, Nara-ken New Public Hall, Nara, Japan   2002   
Spray Modeling System
MIZUNO Takayuki, TANAKA Toshimitsu, OHNISHI Noboru
The Transactions of the Institute of Electrical Engineers of Japan. C   1 Dec 2001   
Extinguisher simulator with VR
Masumura Akihito, Tanaka Toshimitsu, Ohnishi Noboru
Proceedings of the Society Conference of IEICE   29 Aug 2001   
Yoshinori Takeuchi,Hiroshi Oryoji,Tsuyoshi Yamamura,Toshimitsu Tanaka,Noboru Ohnishi
Proceedings of the IASTED International Conference on Visualization, Imaging and Image Processing (VIIP 2001), Marbella, Spain, September 3-5, 2001   2001   
Hiroshi Banno,Yasunori Ohtsuka,Toshimitsu Tanaka,Noboru Sugie
Human-Computer Interaction INTERACT '01: IFIP TC13 International Conference on Human-Computer Interaction, Tokyo, Japan, July 9-13, 2001   2001   
Hirotaka Ito,Toshimitsu Tanaka,Noboru Sugie
Human-Computer Interaction INTERACT '01: IFIP TC13 International Conference on Human-Computer Interaction, Tokyo, Japan, July 9-13, 2001   2001   
Spray Modeling System
Mizuno Takayuki, Tanaka Toshimitsu, Ohnishi Noboru
IEEJ Transactions on Sensors and Micromachines   2001   
Spray Modeling System is a real-time interactive 3D modeling system that shaves and swells objects by spraying virtual particles onto their surfaces. Users can make holes and fill them with the same spraying operation. This system achieves the sim...
Automated Generation of Camera Work in Three Dimensional Computer Graphics
Ota Atsushi, Tanaka Toshimitsu, Ohnishi Noboru
IEEJ Transactions on Sensors and Micromachines   2001   
This paper presents a computer system that automatically generates camera works for a scene with moving objects. Most realistic and attractive shots follow the common sense of camera control. Thus we implement each rule of the camera control as a ...
Automated Generation and Support of Camera Work in Three Dimensional Computer Graphics
OTA Atsushi, TANAKA Toshimitsu, OHNISHI Noboru
IPSJ SIG Notes   8 Dec 2000   
This paper presents a method for generating camera work automatically in order to produce the attractive three-dimensional CG animation. This method is useful for supporting the design of the camera work. Virtual directors are defined each of whic...
Relief design system with multiple modeling methods
IKUTA Daisuke, TANAKA Toshimitsu, HORIBA Isao, YAMAMOTO Shin, SUGIE Noboru
Technical report of IEICE. Multimedia and virtual environment   22 Mar 2000   
This paper presents a relief modeling systen in the virtual space. The systen consists of an interactive modeling environment and a shape conversion program. The interactive system provides several curving tools that simulate real relief modeling,...
Human motion reconstruction from a single view with the action model
HIRANO Kazumi, TANAKA Toshimitu, OHNISHI Noboru
Technical report of IEICE. PRMU   17 Mar 2000   
This paper presents a stable method for recovering three-dimensional motion of the human body from a single view with an motion model. The motion model memorizes a sequece of joint angles of the human body. Players in video streams trace the motio...
1-3 Real-Time extraction of an acting person on the stage
ORYOJI Hiroshi, TANAKA Toshimitsu, TAKEUOHI Yoshinori, OHNISHI Noboru
PROCEEDINGS OF THE ITE WINTER ANNUAL CONVENTION   2000   
Estimating the Orientation of a Signboard Along with Distortion Rectification
LIU Yongmei, YAMAMURA Tsuyoshi, TANAKA Toshimitus, OHNISHI Noboru
Technical report of IEICE. HIP   20 Nov 1999   
In this paper, we describe an approach for estimating the orientation of a signboard relative to the camera from a single view and rectifying a distorted signboard image taken from a non-orthogonal viewing direction. First, signboards in scene ima...
Image Enhancement by Human Visual System
MIZUNO Yasuo, TANAKA Toshimitsu, OHNISH Noboru
Technical report of IEICE. PRMU   18 Feb 1999   
Most of display and printer can use at most a resolution scale fo 256 to describe RGB data of color images,thus there are limits in image reprenting ability. Some of image detail is hard to distinguish or may be lost. We propose image enhancement ...
Interactive Reconstruction of Architectures for the Landscape Simulation
KAWAMURA Kazunari, TANAKA Toshimitsu, OHNISHI Noboru
Technical report of IEICE. PRMU   18 Mar 1999   
In this paper, we propose a new approach for reconstructing existing architectures from some photographs for the landscape simulation. Stereo vision techniques are employed. For accurate shape reconstruction, two cameras must be located far each o...
Hand Motion Classification based on Motion Parameters
KEAN Lim Jit, KUDO Hiroaki, YAMAMURA Tsuyoshi, TANAKA Toshimitsu, OHNISHI Noboru
Technical report of IEICE. PRMU   18 Mar 1999   
The realization of motion recognition has a wide range of application such as in man-machine interface and surveillance. Our work focuses on the classification of arm motion from monocular image sequence. As object motion can be characterized by i...
The feeling of the material using human traffic stain
HONAMI Daisuke, TANAKA Toshimitsu, OHNISH Noboru
IEICE technical report. Image engineering   2 Feb 1999   
Color variance by soil and dust is important for architectural simulation, so that their correct synthesis is necessary in order to improve reality of computer generated images, We thought soil and dust which generated by environment, frequency of...
Image Enhancement by Hyuman Visual System
水野 康生, 田中 敏光, 大西 昇
全国大会講演論文集   5 Oct 1998   
Interactive Reconstruction of Structures for Landscape Simulation
川村 和也, 田中 敏光, 大西 昇
全国大会講演論文集   5 Oct 1998   
The feel of the material using stain by human traffic
穂浪 大輔, 田中 敏光, 大西 昇
全国大会講演論文集   5 Oct 1998   
Interactive 3D Modeling with Spraying
NODA Yasuyuki, TANAKA Toshimitsu, OHNISHI Noboru
Technical report of IEICE. HIP   13 Mar 1998   
An interactive 3D modeling method is presented here. The method shaves and swells object surfaces by spraying virtual particles onto the surfaces. Therefore various shape modifications, from wide to narrow and/or sharp to rough, are available by c...
A Virtual Camera System Generating Soccer Scenes from an Arbitrary Point of View
MATSUI Kentaro, HIRANO Kazumi, TANAKA Toshimitsu, OHNISHI Noboru
Technical report of IEICE. PRMU   12 Mar 1998   
In order to create more realistic soccer scene from TV images, we have developed an image synthesis system which generates an image sequence from the viewpoint of a player on the field. This system is based on the camera calibration theory. First,...
Interactive 3D Modeling with Spraying
NODA Yasuyuki, TANAKA Toshimitsu, OHNISHI Noboru
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   16 May 1997   
An interactive method is presented here for direct and simply 3D modeling. The method sprays particles onto object surfaces due to shave or swell the surfaces. It is a simulation of sandblast operations in virtual space. Various modifications of o...
3D Shape Recovery System of Pipe Parts from a Single Drawing
UMEDA Shigeyuki, YAMAMURA Tsuyoshi, TANAKA Toshimitsu, OHNISHI Noboru, KUNO Minoru
Technical report of IEICE. PRMU   7 Mar 1997   
The piping parts are usually represented through one-view drawing. We have developed a system, which can produce part's projection (line drawing) to an arbitrary image plane from a drawing. The system analyzes a drawing described in vector data an...
A Camera System for Separating Real and Virtual Images
IWASE Masaki, YAMAMURA Tsuyoshi, TANAKA Toshimitsu, OHNISHI Noboru
IEICE technical report. Image engineering   3 Feb 1997   
In computer vision, reflection on specular surface is sometimes an unexpected phenomenon, because overlapping images prevent us from applying standard vision algorithms. In this paper, we propose an on-line camera system for separating real images...
Discriminating Emotions intended in Speech
SHIRASAWA Toshiyuki, YAMAMURA Tsuyoshi, TANAKA Toshimitsu, OHNISHI Noboru
HIP   24 Jan 1997   
In this paper, we discriminated speaker's emotions in speech by multivariate analysis. We extracted prosody components, such as temporal structure, amplitude structure and pitch stricture, from 224 speech samples, representing suitably speaker's e...
Estimating the Orientation of a Signboard Along with Distortion Rectification
Liu Yongmei, Yamamura Tsuyoshi, Tanaka Toshimitus, Ohnishi Noboru
ITE Technical Report   1999   
In this paper, we describe an approach for estimating the orientation of a signboard relative to the camera from a single view rectifying a distorted signboard image taken from a non-orthogonal viewing direction. First, signboards in scene images ...
Image enhancement like paintings
TANAKA Toshimitsu, TANAKA Yuji, OHNISHI Noboru
IPSJ SIG Notes. CVIM   21 Nov 1996   
This paper has presented a method which enhances images like paintings. Highlights and shadows increase image reality, however, since pixel intensity is over 256 in highlights and nearly zero in shadows, details in the areas can not be recognized....
The feeling of the material using human traffic stain
Honami Daisuke, Tanaka Toshimitsu, Ohnish Noboru
ITE Technical Report   1999   
Color variance by soil and dust is important for architectural simulation, so that their correct synthesis is necessary in order to improve reality of computer generated images. We thought soil and dust which generated by environment, frequency of...
3D Modeling Using Conceptual-Model and a Line Drawing
Taniyama Masayuki, Tanaka Toshimitsu, Ohnishi Noboru
IEICE technical report. Pattern recognition and understanding   14 Mar 1996   
This paper presents a 3D shape generation method using a conceptual-model and a line drawing. The conceptual-model consists of simple shape elements, such as boxes and cylinders, and includes geometrical constraints between the elements. The model...
Image Synthesis from a Moving Player : Automatic Calibration and Player Extraction
MATSUI Kentaro, IWASE Masaki, TANAKA Toshimitu, OHNISHI Noboru
Proceedings of the Society Conference of IEICE   1996   
筆者らは,サッカーの試合中継を画像処理し,プレイ中の選手から見たシーンをCGで生成するシステムを提案した.このシステムは,静止画像を対象とし,キャリブレーションや選手抽出に際して,人間の補助を必要としている.本研究は,対象を動画像まで拡張するために,上記の処理を自動化したものである.自動化を可能にした手法と,システムの概要について報告する.
A Method for Separating Real and Virtual Objects from Their Overlapping Images
Kumaki Kenji, Yamamura Tsuyoshi, Tanaka Toshimitsu, Ohnishi Noboru
IPSJ SIG Notes   16 Nov 1995   
This paper proposes a method for separating real objects behind glass and virtual ones reflected on it. Generally speaking. light is more polarized when reflected on glass than when transmitted through it. This optical property allows us to elimin...
Image Synthesis from a Soccer Palyer
Iwase Masaki, Tanaka Toshimitsu, Ohnishi Noboru
IEICE technical report. Pattern recognition and understanding   1995   
Image synthesis system has been proposed. It uses a single picture of a soccer game. Firstly the system determines camera parameters of the picture by using white lines drawn on the soccer ground. Then, it recovers players' positions. As the resul...
Road surface Representation based on Traffic model
Shirasawa Toshiyuki, Tanaka Toshimitsu, Ohnishi Noboru
Proceedings of the Society Conference of IEICE   1995   
金属,ガラス,木,石,布地,生物の皮革などの質感をコンピュータグラフィックス(CG)で表現する研究が盛んに行なわれている.しかし,これらの多くは素材そのものの質感表現手法であり,汚れや傷などの生活感を表現する研究はあまり行なわれていない.景観シミュレーションでは写真のマッピングで路面の質感を表示することが一般的である.このため,建設されてからの時間や道路の使用状態による経年変化は考慮されず,単調で現実感の乏しい路面となっている.そこで,生活感のあるCG画像生成の第一歩として,建設されてから...
Cross Scan Buffer for multi-size images
田中 敏光, 高橋 時市郎
全国大会講演論文集   27 Sep 1993   
画像生成過程で視点や物体の移動は行わないが、照明を移動したり、質感パラメータを変更すると言った試行錯誤はしばしば行われる。このような場合、隠れ面消去結果をバッファに保存しておけば、レンダリングだけを再実行することで画像生成時間を短縮できる。このアイデアはSpan buffer、光線追跡木、G-buffers等により実現されているが、これらのバッファは物体を量子化して保存しているので、エリアシングの発生を避けることができない。量子化によるエリアシングは画像を拡大表示すると顕著になる。また、拡...
Recovery of Three-Dimensional Shape based on Generalized Symmetry
田中 敏光, 高橋 時市郎, 増田 功
全国大会講演論文集   1 Oct 1986   
最近CGによる画像生成が盛んになってきた。しかし、CSG(Constructive Solid Geometry)等現在使われている形状入力技術では、複雑な曲面を持った形状を入力するには、多くの労力と時間が必要である。そこで、曲面が簡便に入力でき、直感的に理解しやすい形状入力法が望まれている。我々は、物体がGeneralized Symmetryの性質を持つと仮定することにより、正射影像と付加情報から三次元形状を復元する原理を提案した。その適用例として、スケッチを用いて三次元曲面形状を復元...
A Method for Checking the Correctness of Dimensioning for Polyhedral Objects
TANAKA TOSHIMITSU, SUGIHARA KOKICHI, SUGIE NOBORU
IPSJ Journal   15 Jan 1985   
人間同士で形状情報を伝達する場合には 図でだいたいの形を表し そこに長さ・角度等の寸法指定情報を与えて形状を一義的に決定する という方法をよく使う.そこで この方法により計算機に形状が入力できれば 正確な座標値などを直接入力する方法と比べて 人間にとってずっと苦痛の少ない入力方法になるであろう.このとき問題となるのは 与えられた寸法指定情報が適正か否かということである.従来この問題は 形状を決定するために寸法指定情報に過不足がないか否かの観点から論じられてきた.しかし 実際に寸法指定情報を...
A Camera System for Separating Real and Virtual Images
Iwase Masaki, Yamamura Tsuyoshi, Tanaka Toshimitsu, Ohnishi Noboru
ITE Technical Report   1997   
In computer vision, reflection on specular surface is sometimes an unexpected phenomenon, because overlapping images prevent us from applying standard vision algorithms. In this paper, we propose an on-line camera system for separating real images...

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Study on 3D modeling systems with simple operations
High quality and realistic image genoration methods
Study on edutainment CG software