Shun Iwasawa

Contact
Mail: gogo893gmail.com

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Research

Visualization of Structural Colors

One of the definitions of "Structural Colors" is a general term for color phenomena that comes from difference in the behaviors of lights of various wavelengths, and is separated from the normal color phenomena by pigments. The main purpose of this research is to represent the colors of surfaces with complicated and semi-periodic micro structures, as in surfaces of physical being such as Morpho butterflies, peacock feathers, etc.

- Visualization of Morpho Butteflies

Visualization of Morpho Butterfly
Rendered images (Above) and the real images (Below) of the wings of Morpho butterfly. Conditions: vertical sunlight, viewing angle 10, 30, 50 and 60 degrees from left to right. (click to enlarge)

Publications

"Rendering Methods for Models with Complicated Micro Structures"
(S. Iwasawa , N. Shichijo and Y. Kawaguchi. 6pages pdf,2.7MB)
- ACM SIGGRAPH 2004 Poster Session (2004)
(ACM Student Research Competition, Semi Final Competitor)
- ICAT2004 Proceedings (2004)
Abstract
The male Morpho Butterflies have peculiar vivid cobalt blue wings caused by microscopic structures on its scales. Its color is due to structural specificity and not caused by its pigments. Those reflectional color effects are known as gstructural colorsh. The methods to represent structural colors have been extensively studied from the viewpoint of anisotropic reflection, but those previous studies were based on phenomenological modeling of measured reflectance functions and thus specific microstructure of the target surfaces was disregarded. In this paper, a physically sound structural model is proposed taking account of the effect of interference, diffraction, light scattering, anisotropy and semiperiodicity of microstructure on its surface and a new rendering method is developed.

"Visualization of Strucutural Colors on Morpho Butterflies' Scales"
- 4th annual Structural Colors Symposium, Poster Session (Hamamatsu, Japan / Nov. 2004)

- Visualization of Soap Bubbles

Visualization of Soap Bubble ClusterVisualization of Soap Bubbles
3 steps to visualize the Soap Bubbles. (from left to right) 1) Soap bubble cluster geometry are modeled by using Surface Evolver. 2) The coloring effect of thin film intereference is applied in shader. 3) Applying a spacial variation of thickness of thin film. This image is rendered with the condition of blue light.

For modeling of these soap bubble cluster geometries, I applied the Surface Evolver by Ken Brakke. For rendering , I applied BMRT. I wrote a shader language to simulate a thin film interference on soap bubble's surface. Spectral reflectances of the wavelengths of RGB are caluculated (click to enlarge).

- Visualization of Soap Bubbles, Generated from Hand-drawn Animation (2007)

GUI screen shotRender result 1Render result 2Render result 3

This software is to create a thin-film interference color effect from hand-drawn animation input. Users can input the drawing(s) representing the shape of soap bubble, as well as the reference images for the film thickness. This software creates a normal-map from the bubble shape, and computes the thin-film interference color for each pixel. Spectral intensities of every 10nm of the visible wavelengths are caluculated.

Simulation of Japanese Cartoon Animation's Style

- Rendering the Hand-drawn Like, Wind-blown Grass Field Sequence (2006)

GUI screen shot instruction1 instruction2 example

When the wind blows on the grass field, a wavy pattern according to the wind pressure appears on the field. In many of the Japanese Animation, moving brush strokes are used in order to represent such scene. This software is to create wind-blown grass field sequence, with Japanese animation-like style. The sequence can be controled in real-time and is easier to modify than drawing by hand.


Interactive CG Installation/Performing Arts

Main idea for making interactive CG installations is, the assumption that each CG is programmed as some model ruled by some simulation algorythm occuring in nature. Audience/Dancer's action and movement are captured, and interact as set of parameters affecting its virtual environment.
These CG works are programmed by C++, with OpenGL. They propagate and react emotionally according to the movement of audiences, by using a DV(or CCD) Camera as a capture device.

Exhibition Log

- electronic Art Talent Kanazawa 2003 (eAT'03) Opening Performance. (7th Feb. 2003, Kanazawa,Japan)
CG programming: Shun Iwasawa, Wearable Computer Tech.: Junji Watanabe,
Produce: Prof. Yoichiro Kawaguchi, Dance Performance: Maria Adriana Verdaasdonk,Fukiko Endo, HIROTSUGU(66b/cell)

eAT03 pollen sceneeAT03 life sceneeAT03 fur sceneeAT03 shock sceneeAT03 shock scene
eAT03 pollen sceneeAT03 pollen sceneeAT03 Life sceneeAT03 Shock sceneeAT03 Shock scene

- Interactive CG installation for the Exhibition: "CG art of Yoichiro Kawaguchi".(18th Jul. - 31st Aug. 2003, Kirishima Open-Air Museum,Kagoshima,Japan)
Planning and CG programming: Shun Iwasawa, Produce: Prof. Yoichiro Kawaguchi.
kirishima fur scenekirishima gigaro scenekirishima tentacle scenekirishima tentacle scene

- SIGGRAPH 2003 16th aniv. Sake Barrel Opening Reception.(a.k.a. SAKE PARTY, 27th July 2003, San Diego,USA)
Planning and CG programming: Shun Iwasawa, Produce: Prof. Yoichiro Kawaguchi, Collaborate with KOTO (=Japanese harp).

- Interactive CG and dance performance event in "Chiyoda city art 2003". (21st, Aug. 2003, Tokyo,Japan)
Planning, Directing and Making CG animation: MOCCA (Shinji Sasada, Tomofumi Yoshida, Shun Iwasawa)

- Symposium and Interactive CG Performance "the Universe of Yoichiro Kawaguchi"(Speaker: Prof. Yoichiro Kawaguchi and Prof. Marvin Minsky, 16th Sep. 2003, NHK Chiyoda Hall,Tokyo,Japan)
CG programming: Shun Iwasawa, Produce: Prof. Yoichiro Kawaguchi, Dance Performance: Shinnosuke Fujima(Classical Japanese dancer).

- Interactive CG installation for the Exhibition: "Magic Shadows -the 100th Anniversary of Edo-Tokyo government-".(21st Sep. - 19th Oct. 2003, Tokyo Metropolitan Museum of Photography,Japan)
Planning and CG programming: MOCCA(Shinji Sasada, Tomofumi Yoshida, Shun Iwasawa)

- Interactive CG installation for the Exhibition: "Cyber art of Yoichiro Kawaguchi".(1st - 3rd Nov. 2003, Joetsu Museum of Science,Niigata,Japan)
Planning and CG programming: Shun Iwasawa, Produce: Prof. Yoichiro Kawaguchi.
Joetsu Fur SceneJoetsu Tentacle SceneJoetsu Gigaro SceneJoetsu Tentacle Scene: EvolvedJoetsu Performance: YOSAKOI

- Interactive CG Performance for TV program: "New Era of Digital Television" (1st Dec. 2003, NHK)
CG programming: Ken Watanabe, Yutaka Yokokawa, Shun Iwasawa, Produce: Prof. Yoichiro Kawaguchi, Dance Performance: Togi Hideki(Gagaku),Shinnosuke Fujima(Classical Japanese dancer).

- III Exhibition (24th - 25th Jul. 2004, Tokyo University,Japan)
Planning, CG programming and Poster Design: Shun Iwasawa.

- Sound Cave (6th Oct - . 2004, SPUTNIK LOW,Tokyo,Japan)
CG programming and VJ: Shun Iwasawa, Live:DOKAKA.

- ICAT 2004(The 14th International Conference on Artificial Reality and Telexistence, 1st Dec. 2004, Seoul,Korea)
CG programming: Shun Iwasawa.

- III Exhibition 2 (10th - 12th Dec. 2004, Tokyo University,Japan)
Planning, CG programming and Poster Design: Shun Iwasawa.


- Naked Wild Child (29th Dec. 2004, CAY Aoyama,Tokyo,Japan)
CG programming and VJ: Shun Iwasawa, Live:DOKAKA


- Paris ACM SIGGRAPH (10th Mar. 2005 City of Sciences and Industry,Paris,France)
CG programming: Shun Iwasawa, Ken Watanabe, Produce: Prof. Yoichiro Kawaguchi.


- Interactive CG installation for the Exhibition: "Gemotion: the CG Universe of Yoichiro Kawaguchi".(24th Mar. - 23rd Apr. 2005, Canon Salon S,Tokyo,Japan)
Planning and CG programming: Shun Iwasawa, Produce: Prof. Yoichiro Kawaguchi.

- III Exhibition 3 (7th - 9th July 2005, Tokyo University,Japan)
Planning, CG programming and Poster Design: Shun Iwasawa.


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Illustrations

Year end party 2008Year end party 2007Year end party 2006iii Exhibition 3iii Exhibition 2
Year end party 2008 , Year end party 2007 , Year end party 2006 , iii Exhibition 3 , iii Exhibition 2
iii Exhibition 1Mocca: ChiyodaMocca: MishoanHumbergirlLion
iii Exhibition 1 , Poster image for "Mocca: Chiyoda" , "Mocca: Mishoan" , Humbirgirl
, Lion

Drawings of the CG pioneers :-)

, Jim BlinnNelson Max
Jim Blinn , Nelson Max


Professional Experiences

- Illustration for a book: "How the body shapes the way we think: the embodied revolution in artificial intelligence".
(Rolf Pfeifer, Josh Bongard and Britta Glatzeder, will be published by MIT Press, 2005)

- Cover illustration for a textbook: "Quest Education Program - Role Model Course".
(Published by Educa & Quest, 2005)

- Character design for a booklet.
(Japanese Bankers Association, 2003)

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About Me

Education

Work Experience

Awards Received

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2003-2016(c)Shun Iwasawa

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