From:                     Kendra Smith

Sent:                      Monday, June 19, 2000 11:13 PM

To:                         M?crosöft Research Tech Talk, Sem. Notice

Cc:                         Kendra Smith

Subject:                 UW-CSE Colloq / 6-20-2000 / Hsu / Creature House / Research in DTP at Creature House

UW-CSE Colloq / 6-20-2000 / Hsu / Creature House / Research in DTP at Creature House

 

*NOTE* This lecture will NOT be videotaped.

 

UNIVERSITY OF WASHINGTON

Seattle, Washington 98195

 

Department of Computer Science and Engineering

Box 352350

(206) 543-1695

 

COLLOQUIUM

 

SPEAKER:      Alex Hsu, Creature House

 

TITLE:          Research in DTP at Creature House

 

DATE:           Tuesday, June 20, 2000

 

TIME:           3:30 pm

 

PLACE:                   134 Sieg Hall

 

HOST:           David Salesin

 

ABSTRACT:

 

This talk presents two research works in the DTP area from Creature

House.

 

Part 1: Context dependent dot-gain compensation. This part of the talk

presents a technique to compensate for the dot-gain of individual

printed dots in a context dependent way. Instead of fiddling with an

image independent gamma curve or assuming a constant dot radius, an

empirical solution will be presented for measuring the the effect of

dot gain taking into account its neighbourhood, and then  compensating

for it in the halftoning process. Results from the incorporation of

the technique into various dispersed dot halftoning algorithms will be

presented.

 

Part 2: An efficient anti-aliased scan-conversion technique for

general polygon (concave, self-intersecting, with holes.) The

technique supports both the non-zero winding rule and the even-odd

rule. It uses masks of collapsed edges to build up the final

pixel/sub-pixel pattern for antialiasing. The technique allows high

quality masks similiar to that in the EXACT algorithm to be created.

An implementation of the technique in a drawing application will be

demonstrated with comparison to another leading illustration software.

 

 

BIO:

Alex S.C. Hsu is the R&D Director and one of the founders of Creature

House Ltd., from where the software Fractal Design Expression was

developed. Alex received his Ph.D. from the University of Cambridge,

U.K. in 1992, and took up a teaching position in the Computer Science

Department in the Chinese University of Hong Kong for 3 years before

founding Creature House. He is currently engaged in the R&D of a

vector based cel-animation system called LivingCels and has been

making animations using the system for broadcast use.

 

Email: talk-info@cs.washington.edu

Info: http://www.cs.washington.edu