Published Papers - AMANO Toshiyuki

Meetsu: Augmented Reality Co-located Meeting Support System

Igor de Souza Almeida, Jun Miyazaki, Goshiro Yamamoto, Makoto Fujisawa, Toshiyuki Amano, Hirokazu Kato

VRSJ SIG-MR, HCI KOREA SIG-AR, and KIISE SIG-HCI     2012.04

Interactive photomosaic system using GPU

Makoto Fujisawa, Toshiyuki Amano, Takafumi Taketomi, Goshiro Yamamoto, Yuki Uranishi, Jun Miyazaki

MM 2012 - Proceedings of the 20th ACM International Conference on Multimedia ( ACM )    1297 - 1298   2012  [Refereed]

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A photomosaic is a type of decorative art made up from various other photographs. We present a method for quickly generating photomosaics and propose an interactive recursive photomosaic system. Users can operate the system by using a large display with a touch input function, which allows them to alter the appearance of the image dynamically. © 2012 Authors.

DOI

Local quadrics surface approximation for real-time tracking of textureless 3D rigid curved objects

Marina Atsumi Oikawa, Takafumi Taketomi, Goshiro Yamamoto, Makoto Fujisawa, Toshiyuki Amano, Jun Miyazaki, Hirokazu Kato

Proceedings - 2012 14th Symposium on Virtual and Augmented Reality, SVR 2012 ( IEEE Computer Society )    246 - 253   2012  [Refereed]

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This paper addresses the problem of tracking textureless rigid curved objects. A common approach uses polygonal meshes to represent curved objects and use them inside an edge-based tracking system. However, in order to accurately recover their shape, high quality meshes are required, creating a trade-off between computational efficiency and tracking accuracy. To solve this issue, we suggest the use of quadrics for each patch in the mesh to give local approximations of the object shape. The novelty of our research lies in using curves that represent the quadrics projection in the current viewpoint for distance evaluation instead of using the standard method which compares edges from mesh and detected edges in the video image. This representation allows to considerably reduce the level of detail of the polygonal mesh and led us to the development of a novel method for evaluating the distance between projected and detected features. The experiments results show the comparison between our approach and the traditional method using sparse and dense meshes. They are presented using both synthetic and real image data. © 2012 IEEE.

DOI

Shading illusion: A novel way for 3-D representation on paper media

Toshiyuki Amano

IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops ( IEEE Computer Society )    1 - 6   2012  [Refereed]

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Content printed on the paper media is not rewritable, but its appearances can be controlled by illumination. In this paper, we propose a new method to represent three-dimensional (3-D) shape on the print media by the shading animation using projector-camera feedback. The proposed method consists of a hue, saturation, and value (HSV) map and an appearance control technique, and these are key technologies. The HSV map represents a normal map of the 3-D content, and it is embedded in the printed media by full color print. While the system is projecting a shading animation for the 3-D representation, the embedded information is decoded by modulation estimation using the appearance control technique. © 2012 IEEE.

DOI

Appearance Control for Human Material Perception Manipulation

Toshiyuki Amano, Kenichi Komura, Takashi Sasabuchi, Shota Nakano, Shunya Yamashita

2012 21ST INTERNATIONAL CONFERENCE ON PATTERN RECOGNITION (ICPR 2012) ( IEEE )    13 - 16   2012  [Refereed]

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We describe a new concept of human visual perception manipulation using illumination projection. The idea is to alternate material appearance of an object using projector camera feedback and a manipulation technique of an image-based material appearance. Unlike the simple display technique, our approach can manipulate human material perception for any object using the appearance control technique in real time without scene modeling. The experimental results show the ability of manipulating both human translucent perception and gloss perception.

Anti‐Bayer Pattern Projection for Projector Camera Feedback

天野敏之

日本バーチャルリアリティ学会論文誌 ( 特定非営利活動法人 日本バーチャルリアリティ学会 )  16 ( 4 ) 653 - 662   2011.12  [Refereed]

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In this paper, the problem of the over-projection when we use the Bayer imaging for the drastic appearance control by the projector camera feedback is denoted and the mechanism of how it arise is explained. As a solution for this problem, a simple approach of anti-Bayer projection which restricts over-projection caused by Bayer imaging is proposed. The computational simulations and experimental results which employed Bayer camera show the effectiveness of anti-Bayer projection for the drastic appearance control by the projector camera feedback.

DOI

AR based Co-located Meeting Support System

Igor de Souza Almeida, Jun Miyazaki, Goshiro Yamamoto, Makoto Fujisawa, Toshiyuki Amano, Hirokazu Kato

In Proceedings of The 21st International Conference on Artificial Reality and Telexistence (ICAT2011)     146 - 146   2011.11  [Refereed]

Model Based Tracking of Rigid Curved Objects using Sparse Polygonal Meshes

Marina Atsumi Oikawa, Goshiro Yamamoto, Makoto Fujisawa, Toshiyuki Amano, Jun Miyazaki, Hirokazu Kato

In Proceedings of The 21st International Conference on Artificial Reality and Telexistence (ICAT2011)     145 - 145   2011.11  [Refereed]

Quantitative Evaluation Method for Model-based Tracking of 3D Rigid Curved Objects

Marina Atsumi Oikawa, Goshiro Yamamoto, Makoto Fujisawa, Toshiyuki Amano, Jun Miyazaki, Hirokazu Kato

Proc. of the 2nd International Workshop on AR/MR Registration, Tracking and Benchmarking     2011.10  [Refereed]

CC‐PAID: A Cache‐conscious Parallel Sequential Pattern Mining Algorithm

松原裕貴, 宮崎純, 藤澤誠, 天野敏之, 加藤博一

情報処理学会論文誌トランザクション(CD-ROM)   2011 ( 1 ) ROMBUNNO.DETABESU,VOL.4,NO.2,88-100 - 1375   2011.10  [Refereed]

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本論文では,プロジェクタとカメラによるフィードバック系においてモデル予測制御を用いた見かけの制御方法を提案する.提案手法では,補正光が投影されて動的に変化する状況において推定された白色照明下での見かけを推定する.この推定された見かけを基準として目標とする見かけを画像処理により生成し,モデル予測制御を用いることで自在な見かけの制御を実現した.実験では,カラー印刷物に対して彩度強調,色相制御,明度均一化,エッジ強調などの見かけの制御結果を示した.

A Fast Simulation Method Using SPH and Wavelet for Sub-Particle-Scale Turbulent Flow.

Makoto Fujisawa, Go Mimura, Toshiyuki Amano, Jun Miyazaki, Hirokazu Kato

19th Pacific Conference on Computer Graphics and Applications, PG 2011, Short Papers, Kaohsiung, Taiwan, September 21-23, 2011 ( Eurographics Association )    2011.09  [Refereed]

DOI

情報推薦のためのSkyline演算の拡張

吉武亮, 宮崎純, 藤澤誠, 天野敏之, 加藤博一

平成23年度情報処理学会関西支部支部大会講演論文集     2011.09

消費電力を考慮したOLAP問合せ処理

福澤優, 宮崎純, 藤澤誠, 天野敏之, 加藤博一

    2011.09

モデルベースドトラッキングにおける推定可能自由度の変化に対するロバスト性の向上

熊谷謙造, 山本豪志朗, 藤澤誠, 天野敏之, 宮崎純, 加藤博一

第16回日本バーチャルリアリティ学会大会論文集     pp. 249 - 252   2011.09

モデル予測制御を用いたプロジェクタカメラ系による見かけの制御

天野敏之, 加藤博一

電子情報通信学会論文誌 D ( 一般社団法人電子情報通信学会 )  J94-D ( 8 ) 1368 - 1375   2011.08  [Refereed]

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本論文では,プロジェクタとカメラによるフィードバック系においてモデル予測制御を用いた見かけの制御方法を提案する.提案手法では,補正光が投影されて動的に変化する状況において推定された白色照明下での見かけを推定する.この推定された見かけを基準として目標とする見かけを画像処理により生成し,モデル予測制御を用いることで自在な見かけの制御を実現した.実験では,カラー印刷物に対して彩度強調,色相制御,明度均一化,エッジ強調などの見かけの制御結果を示した.

認識・検出 単位円特徴空間を用いた高速でコンパクトな二次元物体認識

天野 敏之, 木村 将之, 玉木 徹

画像ラボ ( 日本工業出版 )  22 ( 7 ) 21 - 27   2011.07

CC-PAID: A Cache-conscious Parallel Sequential Pattern Mining Algorithm

松原 裕貴, 宮崎 純, 藤澤 誠, 天野 敏之, 加藤 博一

情報処理学会論文誌データベース（TOD） ( 情報処理学会 )  4 ( 2 ) 88 - 100   2011.07  [Refereed]

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本論文では，既存の時系列パターンマイニングアルゴリズムPAIDを対象に，CPUのキャッシュミスの軽減による処理時間の短縮を目的とした改良手法の提案を行う．時系列パターンマイニングでは，データベースの規模やパターンの抽出に用いられる閾値によって非常に長い処理時間が必要とされることが問題とされており，過去の研究においてアルゴリズムや並列化の提案が行われてきた．また，処理対象となるデータベース全体に対して多くの反復的なアクセスが生じ，キャッシュミスが発生しやすいため，大規模なデータベースや小さな閾値を利用した場合，そのレイテンシは全体の処理時間に対して無視できない可能性がある．PAIDアルゴリズムにおいても同様に反復的なアクセスが生じるデータ構造があり，キャッシュミスが起こる可能性が考えられる．そのため，提案手法では処理対象へのアクセスパターンの改良により，PAIDアルゴリズムの特定のデータ構造での時間的局所性を向上させ，キャッシュミスの軽減を行う．また，処理時間を短縮するために並列化も行い，性能評価によりこれらの有効性の確認を行う．In this paper, we propose a technique to reduce the memory access latency caused by cache misses in PAID algorithm. Since sequential pattern mining algorithms generally require long time depending on the database size and the minimum support value, many methods have been proposed such as new efficient algorithms and their parallelization. The sequential pattern mining tends to repeat database scans, which frequently cause cache misses. The frequent cache misses cannot be ignored, when, in particular, a low minimum support value is set. In PAID algorithm, cache misses happen in some data structures which are accessed repeatedly. Therefore, we propose a method to improve the data structures and their access patterns so that temporal locality of reference increases, which leads to more cache hits. In addition, we also parallelize our method to reduce further execution time. We evaluate the efficiency of our method through some experiments.

プロジェクタカメラ系による照明制御を用いた物体認識

天野敏之, 長村一樹, 藤澤誠, 宮崎純, 加藤博一

画像の認識・理解シンポジウム2011 論文集     pp. 1072 - 1079   2011.07

単位円特徴空間を用いた高速でコンパクトな三次元物体認識

天野敏之, 木村将之, 玉木徹, 星田孝憲, 奥川裕之, 梅崎太造

画像ラボ ( 日本工業出版 )  22 ( 7 ) 21 - 27   2011.07  [Refereed]

Controlled Illumination for the Object Recognition with Projector Camera Feedback

Toshiyuki Amano, Kazuki Osamura, Makoto Fujisawa, Jun Miyazaki, Hirokazu Kato

IAPR CONFERENCE ON MACHINE VISION APPLICATIONS MVA2011     152 - 155   2011.06  [Refereed]