Hand‐painted yuzen‐dyeing simulation for online handcraft experience

• Published in: Computer animation and virtual worlds Vol. 35; no. 1
• Main Author: Torii, Takuma
• Format: Journal Article
• Language: English
• Published: Chichester Wiley Subscription Services, Inc 01.01.2024
• Subjects: Algorithms; computer simulation; fluid dynamics; Parameter identification; Physical properties; Simulation; traditional Japanese craft; watercolor painting; yuzen‐dyeing
• ISSN: 1546-4261; 1546-427X
• DOI: 10.1002/cav.2200

On‐site workshops provide an opportunity to learn the craftsmanship, but the first hurdle is often high. Online handcraft experiences can be a solution to this first hurdle by providing preliminary craft experience from anywhere on the internet. In collaboration with a traditional craftsman, this motivated us to develop an online simulator for a thin‐brush dyeing, called yuzen, one of the Japanese traditional handcrafts innovated in the 17th century. The goal of this simulator is providing easy‐going experience, that is, it can be materially unrealistic but mimicking visual appearance. The simulator incorporates various characteristics of yuzen, by which the developed 2D fluid simulation algorithm reduces its computational burden. The yuzen dyeing algorithm is similar to an existing ink‐wash painting algorithm, but the present work provides (1) theoretical justification for the algorithm and parameter choices, (2) implementing yuzen dyeing‐specific characteristics, and (3a) a physical experiment to examine qualitative resemblance, and (3b) to identify unknown physical parameters for further reality in future development. A 2D fluid simulation algorithm was developed for yuzen‐dyeing, a Japanese traditional handcraft. By incorporating characteristics of yuzen, the algorithm achieved acceptable performance in simulations on browsers. A physical experiment examined perceptual resemblance and identified some physical parameters for future research.