The Hong Kong University of Science and Technology
Department of Computer Science and Engineering


PhD Thesis Defence


"Making Digital Painting Organic"

By

Mr. Siu-Hang Chu


Abstract

In this thesis I present physically-based techniques for building
real-time digital painting tools. In particular, I focus on two components
that are most needed in existing paint systems: 3D brush modeling and
water-based paint simulation. A 3D deformable brush model is crucial in
generating organic brush strokes. When paired with a proper input device,
such a brush model also allows true-to-life control of stroke creation
because users can see how the brush deforms in response to their
manipulation while painting.

Existing paint programs do simulate various paint media including
charcoal, oil, and watercolor. However, water-based media like Eastern ink
and Western watercolor are the most unsatisfactory due to their inability
to produce natural-looking marks, especially those with flow effects. In
the second part of my thesis, I present a technique based on a relatively
new computational fluid dynamics method called Lattice Boltzmann to
simulate water-based paint media. Many of the existing real-world artistic
effects as well as novel ones are achievable with this approach.


Date:			Monday, 27 August 2007

Time:			3:00p.m.-5:00p.m.

Venue:			Room 4480
			Lifts 25-26

Chairman:		Prof. David Zweig (SOSC)

Committee Members:	Prof. Chiew Lan Tai (Supervisor)
			Prof. Philip Fu
			Prof. Long Quan
			Prof. Kun Xu (MATH)
			Prof. Tien-Tsin Wong (CSE, CUHK)


**** ALL are Welcome ****