Shun Iwasawa KumoWorks is a software for making cloud scenery. It generates cloud image according to a silhouette you draw. We aim to develop a useful tool for creating background art or color script for animation production. OpenToonz is a software for producing 2D animation. It is based on the software "Toonz", which was developed by Digital Video S.p.A. in Italy, customized by Studio Ghibli, and has been used for creating its works for many years. Dwango launches this OpenToonz project, in cooperation with Digital Video and Studio Ghibli. It is also based on a research collaboration between Dwango and the University of Tokyo in 2016. 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. 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). 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. 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.
Contact
Mail: gogo893_at_gmail.com
Projects
KumoWorks
OpenToonz: Developping a platform for connecting the academic research into frontline animation production.
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Research
Visualization of Structural Colors
- Visualization of Morpho Butteflies
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 colorsh. 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
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.
- Visualization of Soap Bubbles, Generated from Hand-drawn Animation (2007)
Simulation of Japanese Cartoon Animation's Style
- Rendering the Hand-drawn Like, Wind-blown Grass Field Sequence (2006)
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.
,
Jim Blinn , Nelson Max
- Illustration for a book: "Pseudoscienza - Mai piu Maya".
(Marco Casolino, eBrooks, 2012)
- 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, 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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2003-2023 (c) Shun Iwasawa