Homepage

吉澤　信

Title: Dr.-Ing. (Doktor-Ingenieur): 工学博士(ドイツ)
Affiliation: 画像情報処理研究チーム,
光量子工学研究センター, 理化学研究所
Position: 上級研究員
Address: 埼玉県和光市広沢2-1 (351-0198)
E-mail: shin[_at_]riken.jp
AGEPhone: +81 050-3502-5309
ORCiD:0000-0001-8748-6012

Field of Studies: Geometric Methods for Shape Modeling and Analysis

Shape Modeling and Analysis is a research field which treats a shape by the science and engineering techniques. This area was came from a design purpose with variational splines since 200 years. It is inherited by the computer aided design/manufacturing, and computer graphics. On the other hand, a solution in the field of mathematics about the algebraic or differential equation is equivalent to a shape. It had been used for describing and visualizing about the physical phenomenon of a nature, for example, isobar of a weather map. Furthermore, the solutions by which geometric structures, such as graph structure, were optimized has been used in computer vision and image processing by the computational topology and geometry. Although the computational speed and precision accuracy are always trade-off, the goal is developing the automatic algorithm which has high quality, high speed, and high reliability for the shape modeling and analysis.

KEYWORDS: Curvature, Elastica, Skeleton, Interactive Deformation, Mesh Parameterization, Crest Lines, Smoothing

Selected Publications

	*Topological Delaunay Graph for Efficient 3D Binary Image Analysis* Shin Yoshizawa, Takashi Michikawa, and Hideo Yokota: International Journal of Automation Technology, Vol. 18, No. 5, pp. 632-650, 2024. BibTex Preprint Definitive Version (Open Access)
	*Adaptive and Dynamic Regularization for Rolling Guidance Image Filtering* Miku Fukatsu, Shin Yoshizawa, Hiroshi Takemura, and Hideo Yokota: Pacific Graphics, Short Paper, pp. 43-48, October 5-8, 2022, Kyoto, Japan. (PG'22) BibTex Definitive Version (Open Access, EG-DL)
	*Fast and Faithful Scale-Aware Image Filters* Shin Yoshizawa and Hideo Yokota: The Visual Computer, Vol. 37, No. 12, pp. 3051-3062, 2021. BibTex Preprint Definitive Version (Open Access) ACM DL
	*Trimmed Median PCA for Robust Plane Fitting* Suguru Miyagawa, Shin Yoshizawa, and Hideo Yokota: IEEE International Conference on Image Processing, pp. 753-757, October 7-10, 2018, Athens, Greece. (IEEE ICIP'18) BibTex Preprint C++ code IEEE Xplore (Definitive Version)
	*Fast L1 Gauss Transforms for Edge-Aware Image Filtering* Dina Bashkirova, Shin Yoshizawa, Rustam Latypov, and Hideo Yokota: Proceedings of the Institute for System Programming of the Russian Academy of Sciences (Proc. ISP RAS), Vol. 29, issue 4, pp. 55-72, 2017. BibTex Definitive Version (Open Access)
	*細部を復元するシームレス画像合成法* Shin Yoshizawa and Hideo Yokota: 情報処理学会論文誌, Vol. 56, No. 6, pp. 1517-1527, 2015. BibTex Definitive Version (Open Access) EG'13 Best Poster
	*Fast L1 Gaussian Convolution via Domain Splitting* Shin Yoshizawa and Hideo Yokota: IEEE International Conference on Image Processing, pp. 2908-2912, October 27-30, 2014, Paris, France. (IEEE ICIP'14) BibTex Preprint C++ code IEEE Xplore (Definitive Version)
	*Flower Modeling via X-ray Computed Tomography* Takashi Ijiri, Shin Yoshizawa, Hideo Yokota, and Takeo Igarashi: ACM SIGGRAPH, August 10-14, 2014, Vancouver, Canada, (SIGGRAPH'14) ACM Transactions on Graphics, Vol. 33, No. 4, pp. 48:1-48-10, 2014. BibTex Preprint Definitive Version (Open Access, ACM DL) T. Ijiri's Software, Flower CTs, and Models.
	*Möbius-invariant surface energies and ridges* Shin Yoshizawa and Alexander G. Belyaev: The Mathematics of Surfaces XIV, pp. 109-125, September 11-13, 2013, Birmingham, UK. (IMA MoS'13) BibTex Preprint PPT slides
	*Bilateral Hermite Radial Basis Functions for Contour-based Volume Segmentation* Takashi Ijiri, Shin Yoshizawa, Yu Sato, Masaaki Ito, and Hideo Yokota: EUROGRAPHICS, May 6-10, 2013, Girona, Spain. (EG'13) Computer Graphics Forum, Vol. 32, Issue 2, pp. 123-132, 2013. BibTex Preprint PPT slides Definitive Version T. Ijiri's Software
	*Shape and Image Interrogation with Curvature Extremalities* Shin Yoshizawa, Alexander G. Belyaev, and Hideo Yokota: Journal for Geometry and Graphics, Vol. 16, No. 1, pp. 81-95, 2012. BibTex Preprint Definitive Version
	*高速エッジ保存平滑化フィルタ* Shin Yoshizawa: Computer Graphics Gems JP 2012 -コンピュータグラフィックス技術の最前線- , Chapter 5, pp. 89-120, 2012. BibTex C++ Source Code Amazon
	*Interactive Registration of Intracellular Volumes with Radial Basis Functions* Shin Yoshizawa, Satoko Takemoto, Miwa Takahashi, Makoto Muroi, Sayaka Kazami, Hiromi Miyoshi, and Hideo Yokota: International Journal of Computational Intelligence and Applications, Vol. 9, Issue 3, pp. 207-224, 2010. BibTex Preprint Definitive Version
	*Fast Gauss Bilateral Filtering* Shin Yoshizawa, Alexander G. Belyaev, and Hideo Yokota: Computer Graphics Forum, Vol. 29, No. 1, pp. 60-74, 2010. BibTex Preprint C++ code Definitive Version
	*Fast, Robust, and Faithful Methods for Detecting Crest Lines on Meshes* Shin Yoshizawa, Alexander G. Belyaev, Hideo Yokota, and Hans-Peter Seidel: Computer Aided Geometric Design (CAGD), Vol. 25, Issue 8, pp. 545-560, 2008. BibTex Preprint Definitive Version ACM DL
	*Fast and Faithful Geometric Algorithm for Detecting Crest Lines on Meshes* Shin Yoshizawa, Alexander G. Belyaev, Hideo Yokota, and Hans-Peter Seidel: Pacific Graphics, pp. 231-237, October 29-November 2, 2007, Maui, Hawaii. (PG'07) BibTex Preprint PPT slides IEEE Xplore (Definitive Version) ACM DL
	*Skeleton-based variational mesh deformations* Shin Yoshizawa, Alexander G. Belyaev, and Hans-Peter Seidel: EUROGRAPHICS, September 3-7, 2007, Prague, Czech. (EG'07) Computer Graphics Forum, Vol. 26, No. 3, pp. 255-264. BibTex Preprint PPT slides Definitive Version
	*Smoothing by Example: Mesh Denoising by Averaging with Similarity-Based Weights* Shin Yoshizawa, Alexander G. Belyaev, and Hans-Peter Seidel: IEEE International Conference on Shape Modeling and Applications, pp. 38-44, June 14-16, 2006, Matsushima, Japan. (IEEE SMI'06) BibTex Preprint C++ code & Java Viewer PPT slides IEEE Xplore (Definitive Version) ACM DL
	*Towards Stable and Salient Multi-View Representation of 3D Shapes* Hitoshi Yamauchi, Waqar Saleem, Shin Yoshizawa, Zachi Karni, Alexander G. Belyaev, and Hans-Peter Seidel: IEEE International Conference on Shape Modeling and Applications, pp. 265-270, Short Paper, June 14-16, 2006, Matsushima, Japan. (IEEE SMI'06) BibTex Preprint Slides IEEE Xplore (Definitive Version) ACM DL
	*Fast and Robust Detection of Crest Lines on Meshes* Shin Yoshizawa, Alexander G. Belyaev, and Hans-Peter Seidel: ACM Symposium on Solid and Physical Modeling, pp. 227-232, Technical Sketch, June 13-15, 2005, MIT, Cambridge, MA. (ACM SPM'05) BibTex Preprint C++ code & Java Viewer PPT slides (extended) Definitive Version (ACM DL)
	*A fast and simple stretch-minimizing mesh parameterization* Shin Yoshizawa, Alexander G. Belyaev, and Hans-Peter Seidel: International Conference on Shape Modeling and Applications, pp. 200-208, Jun 7-11, 2004, Genova, Italy. (SMI'04) BibTex Preprint C++ code PPT slides PDF IEEE Xplore (Definitive Version) ACM DL
	*Free-form Skeleton-driven Mesh Deformations* Shin Yoshizawa, Alexander G. Belyaev, and Hans-Peter Seidel: ACM Symposium on Solid Modeling and Applications, pp. 247-253, June 16-20, 2003, University of Washington, Seattle. (ACM SMA'03) BibTex Preprint C++ code to extract the Voronoi-based skeletal mesh. PPT slides Definitive Version (ACM DL)
	*A Simple Approach to Interactive Free-Form Shape Deformations* Shin Yoshizawa, Alexander G. Belyaev, and Hans-Peter Seidel: Pacific Graphics, pp. 471-474, Poster Paper, October 9-11, 2002, Beijing, China. (PG'02) BibTex Preprint Free-Form Shape Deformator (with Source Code) Poster PDF IEEE Xplore (Definitive Version) ACM DL
	*Fair Triangle Mesh Generation with Discrete Elastica* Shin Yoshizawa and Alexander G. Belyaev: Geometric Modeling and Processing, pp. 119-123, July 10-12, 2002, RIKEN, Saitama, Japan. (GMP'02) BibTex Preprint PDF IEEE Xplore (Definitive Version) ACM DL
	*On Evolute Cusps and Skeleton Bifurcations* Alexander G. Belyaev and Shin Yoshizawa: International Conference on Shape Modeling and Applications, pp. 134-141, May 7-11, 2001, Genova, Italy. (SMI'01) BibTex Preprint IEEE Xplore (Definitive Version) ACM DL
	*Visualization and Study of Dynamic 2D Shapes via Curvature* Shin Yoshizawa and Alexander G. Belyaev: International Conference on Multimedia Modeling, pp. 469-489, November 13-15, 2000, Nagano, Japan. (MMM2000) BibTex Preprint Definitive Version Dynamic Curve Simulator
	*Nonlinear spline generation with curve evolutions driven by curvature* Alexander G. Belyaev, Elena V. Anoshkina, and Shin Yoshizawa: International Conference on Shape Modeling and Applications, pp. 146-153, March 1-4, 1999, Aizu-Wakamatsu, Japan. (SMI'99) BibTex Preprint IEEE Xplore (Definitive Version) ACM DL

その他の講演・口頭発表 (Selected)

Fast and Faithful Scale-Aware Image Filters

Shin Yoshizawa and Hideo Yokota
Workshop in Homage to Professor T. L. Kunii, Computer Graphics International (CGI'21), Slides, Video (YouTube), Invited, September 6-10, 2021, Online.

Edge-aware Image Filters via Domain Splitting L1 Gaussian Convolutions

Shin Yoshizawa
International Congress on Industrial and Applied Mathematics (ICIAM), Invited Minisymposia Talk, July 15-19, 2019, Valencia, Spain.

Fast Image Filtering with L1 Gauss Transform

Dina Bashkirova, Shin Yoshizawa, and Hideo Yokota
Poster Presentation at International Computer Vision Summer School (ICVSS), in Poster Booklet pp. 4, July 9-15, 2017, Sicily, Italy. (Selected AR: 34.9%).

Shape Aesthetics and Features via Möbius Invariants

Shin Yoshizawa
Seminar, Invited Talk, Institute of Perception, Action and Behaviour, Edinburgh University, September 3, 2013, Edinburgh, Scotland, UK.

Poisson Image Analogy: Texture-Aware Seamless Cloning

Shin Yoshizawa and Hideo Yokota
Poster Presentation at EUROGRAPHICS, in Poster Proc. 5-6, May 6-10, 2013, University of Girona, Girona, Spain (査読有).
BibTex Preprint Definitive Version (Open Access, EG-DL)
Best Poster Award: Springer Prize for the Best Eurographics Poster 2013.

Tracking Melanosomes via Particle Filter with Lloyd Partitioning

S. Yoshizawa, T. Fujiwara, M. Fukuda, and H. Yokota
Poster Presentation at International Conference on Systems Biology (ICSB2011), in Abstract Book, pp. 212 (PS 383), August 28-September 1, 2011, Mannheim, Germany (査読有).

Feature-Preserving Filters for Biomedical Image Denoising and Clustering

Shin Yoshizawa, Alexander Belyaev, and Hideo Yokota
Poster Presentation at International Conference on Systems Biology (ICSB2010), in Abstract Book, page 189, October 10-14, 2010, Edinburgh, UK (査読有).

Curvature-based Multidimensional Image Creases

Shin Yoshizawa, Alexander Belyaev, and Hideo Yokota
Seminar, Invited Talk, Institute of Perception, Action and Behaviour, Edinburgh University, October 13, 2010, Edinburgh, Scotland, UK.

A Novel Approach for Fast and Accurate Bilateral Filtering

Shin Yoshizawa, Alexander Belyaev, and Hideo Yokota
CG Lunch, Invited Talk, Max-Planck-Institut fuer Informatik, October 29, 2009, Saarbruecken, Germany.

On surface ridges and their use for shape analysis

Shin Yoshizawa, Alexander Belyaev, Hideo Yokota, and Hans-Peter Seide
Seminar, Invited Talk, Institute of Perception, Action and Behaviour, Edinburgh University, October 22, 2009, Edinburgh, Scotland, UK.

Volume Processing for Cell Biology

Shin Yoshizawa and Hideo Yokota
Seminar, Invited Talk, Durham University, October 30, 2008, Durham, England, UK.

Image & Geometry Processing for Cell Biology

Shin Yoshizawa and Hideo Yokota
Signal and Image Processing Joint Seminar, Edinburgh Research Partnership in Engineering and Mathematics, Invited Talk, October 29, 2008, Heriot-Watt University, Edinburgh, Scotland, UK.

Skeleton-driven Laplacian Mesh Deformations

Shin Yoshizawa, Alexander G. Belyaev, and Hans-Peter Seidel
Poster Presentation at EUROGRAPHICS Symposium on Geometry Processing (SGP'06), in Poster Proceedings page 11, June 26-28, 2006, Sardinia, Italy. (査読有)

Skeleton-driven Mesh Deformations

Shin Yoshizawa, Alexander G. Belyaev, and Hans-Peter Seidel
AIM@SHAPE Summer School on Interactive Shape Modeling, July 8-12, 2005, Darmstadt, Germany.

Fast and accurate detection of ridges and ravines on surfaces approximated by dense triangle meshes

Shin Yoshizawa, Alexander G. Belyaev, and Hans-Peter Seidel
International Conference on Mathematical Methods for Curves and Surfaces, in Abstract Proceedings page 70, July 1-6, 2004, Tromso, Norway. (査読有)

Skeleton-based Shape Deformations

Shin Yoshizawa, Alexander G. Belyaev, and Hans-Peter Seidel
Highgraphics 2003, February 24-28, Oberjoch, Germany.

On Variational and Free-Form Shape Modeling

Shin Yoshizawa
精密工学会: メガポリゴン研究部会招待講演, January 25, 2002, University of Tokyo, Japan.
AG4 Group Meeting, April 30, 2002, Max-Planck-Institut fuer Informatik, Saarbruecken, Germany.

Tools for Shape Modeling with Dynamic Meshes

Shin Yoshizawa
International Workshop on Geometric Modeling, Computing, and Visualization, October 19-22, 2001, University of Aizu, Japan.

A Simple Approach to Interactive Free-Form Shape Deformations
- Shin Yoshizawa
- International Workshop on Geometric Modeling, Computing, and Visualization, October 19-22, 2001, University of Aizu, Japan.
Nonlinear Spline Modeling with Curvature-Driven Deformations

Shin Yoshizawa
Workshop on Singularity Theory and its Applications, October 26-30, 1998, University of Aizu, Japan.

Complete Talk List

現在実施中の研究

Extraction & Analysis of Geometric-Features: Curvature, Ridges, Crest Lines, and Skeleton (Medial Axis)
Fast Filtering and Convolution Algorithms
Geometric Median, Robust PCA
Seamless Image Cloning
Curve, Surface, and Volume Flows
Variational and Free-Form Shape Modeling
Image and Geometry Processing for Cell Biology

略歴, 奨学金・研究費, 学会活動

April 2013 - present:
国立研究開発法人理化学研究所, 光量子工学研究センター, 画像情報処理研究チーム, 上級研究員.
- 2019-2024:東京農工大学客員教授: 大学院工学府.
- 2017-2021: ボクセル情報処理システム研究チーム, 理化学研究所.
- 2014-2018: 眼疾患クラウド診断融合連携研究チーム, 理化学研究所.
- 2014-2024: 文部科学省科学技術・学術政策研究所専門調査員.
- Heriot-Watt大学(イギリス)Visiting Scholar (2013年8月-9月).
- 精密工学会2023年(春季)ベストオーガナイザー賞, 電子情報通信学会2019年度ISS功労賞, RAPシンポジウム'16 Best Poster Award, IEEE ICIP'14 Top 10% Paper Award, 情報処理学会2013年度GCAD賞, Springer Prize for the Best Eurographics Poster 2013.
April 2011 - March 2013:
独立行政法人理化学研究所, 基幹研究所, 先端技術基盤部門, 生物情報基盤構築チーム, 基幹研究所研究員.
- 2012-2016: 計測情報処理研究チーム, 理化学研究所.
- 2011/8月-2018:東京農工大学客員准教授: 大学院工学府.
- 2011-2015:大妻女子大学非常勤講師: 画像情報処理論及び演習I, II.
- 2011:九州大学非常勤講師: 大学院生命情報科学特別講義.
- 2011:協力研究員, 2012-:基幹研究所研究員, 2013-: 副チームヘッド, 理化学研究所.
January 2007 - March 2011:
独立行政法人理化学研究所, VCADシステム研究プログラム, 生物基盤構築チーム, 研究員.
- Heriot-Watt大学(イギリス)Visiting Scholar (2008年10月, 2009年10月,2010年10月).
- 2009,2011: 文部科学省新学術領域研究専門委員会委員 (ロジスティクス専門委員会).
- 2011 RIKEN Research Incentive Award, 電子情報通信学会2010年度MI研究奨励賞, 精密工学会2009年(秋季)ベストプレゼンテーション賞.
April 2002 - December 2006:
マックスプランク・コンピュータ科学研究所, コンピュータグラフィクス研究部, Ph.D研究奨学生・研究科学者.
- 2006年12月18日: Doktor der Ingenieurwissenschaften (Dr.-Ing.)取得: 工学博士相当.
  - ドイツ国立ザールランド大学: 理工学第一研究科 (数学・コンピュータ科学)
- PhD 論文: Computational Differential Geometry Tools for Surface Interrogation, Fairing, and Design
April 2001 - March 2002:
会津大学大学院: コンピュータ理工学研究科博士後期課程, 情報システム学専攻, 形状モデリング研究室.
- 会津大学リサーチアシスタント: WWW Medium for e-Learning 3D Geometric Ideas and Algorithms (April 2001-March 2002).
- 会津大学ティーチングアシスタント: 画像処理論 (2001).
- 会津大学課外プロジェクトアシスタント: Computational Geometry and Topology with Java (2001).
April 1999 - March 2001:
会津大学大学院: コンピュータ理工学研究科博士前期課程, 情報システム学専攻.
- 2001年3月: 修士総代
- 2001年3月修了: コンピュータ理工学修士
- 修士論文: Shape Modeling with Dynamic Meshes
- 会津大学ティーチングアシスタント: 応用幾何とトポロジー (1999, 2000), 位相幾何学概論 (1999, 2000), 数値解析 (1999, 2000), 画像処理論 (1999, 2000), 計算幾何学 (1999, 2000), 離散系論 (1999, 2000).
April 1995 - March 1999:
会津大学: コンピュータ理工学部, コンピュータソフトウェア学科.
- 1999年3月卒業: コンピュータ理工学学士
- 学士論文: Nonlinear Spline Modeling with Curvature-Driven Curve Deformations

Fellowships:

April 2005 - December 2006: EU 奨学金, AIM@SHAPE, a Network of Excellence project within EU's [Sixth Framework Programme], European Union.
April 2002 - December 2006: Ph.D 奨学金, 国際マックスプランク研究スクール: コンピュータ科学, Germany.

Academic Activities:

2021-2024: 精密工学会学術講演会セッションオーガナイザー.
2016: Pacific Graphics 国際プログラム委員.
2016-2018, 2020: International Conference on Advanced Concepts for Intelligent Vision Systems 国際プログラム委員.
2016: レゾナンスバイオ公開シンポジウム"Swinging on the Chromophore"及び第一回班会議実行委員.
2015, 2018: Asian Conference on Design and Digital Engineering 国際プログラム委員
2014: ACM Virtual Reality Software Technology 国際プログラム委員
2014-2015: VC/GCADシンポジウムプログラム委員
2014-2016: 日本鉄鋼協会鉄鋼インフォマティクス委員
2013/5-2017/5: 電子情報通信学会誌(英文D) 編集委員
2013: International Workshop on BioImage Recognition プログラム委員
2011-2013: 精密工学会誌編集委員
2010-2012, 2016-2024: 精密工学会外観検査アルゴリズムコンテスト実行委員
2011: 日本機械学会第23回バイオエンジニアリング講演会セッションオーガナイザー
2010: MIRUサテライトワークショップ細胞内画像処理実行委員
2009: 平成21年度、平成23年度文部科学省新学術領域研究専門委員会委員 (ロジスティクス専門委員会)
2009: 第一回細胞内ロジスティクス班会議事務局員
2008: ACM Solid and Physical Modeling 国際プログラム委員.
Association for Computing Machinery (ACM, 2001-present), 精密工学会 (JSPE, 2009-present), 情報処理学会 (IPSJ, 2010-present) 所属.
査読委員:
- ACM (TOG, TOMS), CAGD, IEEE (TPAMI, TVCG, TIP, TNNLS), CGF, CAD, The Visual Computer, Graphical Models, Pattern Recognition Letters, JCST, IJCIA, JSS, IEICE, JSAC, JSME, IJAT, IIEEJ, and Nature.
- EG('04 (SP), '06, '07(STAR), '09-'14), SIGGRAPH Asia'10, PG('05, '11-'12, '14, and '16), ACM/EG SGP'04, IEEE SMI('05 and '06), ACM SCA'04, GMP'08, GI'10, CGI('06 and '10), WSCG('11-'15, and '17-'24), ISVC'06, CAD&G'13, Acivs('16-'18, '20), ICGG'16, ACDDE('12 and '15), ICPE'14, VC/GCAD('07-'11 and '13-'14), IEVC'17, and FIT'11.

Grants:

2018-2022: SIP, 統合型材料開発システムによるマテリアル革命(分担).
2016-2018: 科学研究費補助金, 萌芽.
2015-2019: 科学研究費補助金, 新学術領域研究(分担).
2015-2018: SIP, マテリアルズインテグレーション(分担).
2012-2013: 科学研究費補助金, 若手B.
2008-2012: 科学研究費補助金, 新学術領域研究(分担).
2008-2009: 科学研究費補助金, 若手B.