BU Research Blog

We would like to invite you to a visiting scholar research seminar by Dr. Dongwann Kang next Tuesday afternoon.

Title:         An Artistic Stippling Technique for Animated 3D Models

Date:         Tuesday 9^th February 2016

Time:         3-4PM

Location: P302

Biography

Dongwann Kang received his Ph.D. degree in Chung-Ang University, South Korea in 2013. He also received his B.S. and M.S. degrees in Computer Science and Engineering from Chung-Ang University in 2006 and 2008. He was the research fellow in Chung-Ang University from Mar. 2013 to Jun. 2015. Now, he is a visiting researcher in the SciTech, Bournemouth University, UK. His research interests include artistic stylization, emotional computing, image manipulation and GPU processing.

Abstract

Stippling is the creation of a pattern simulating varying degrees of solidity or shading by using small dots. Such a pattern may occur in nature and these effects are frequently emulated by artists. ‘Hedcut’ is a stippling style for newspaper illustrations. Specifically, this technique, which combines stippling and line drawing, employs a directional stipple pattern similar to cross- hatching. Unlike traditional stippling methods that represent the tone of a subject by the density of the stipples, hedcut evenly distributes stipples with such a directional pattern and adjusts the size and tone of the stipples. In this presentation, I present a hedcut rendering method for animated 3D models that satisfies these characteristics. To maintain frame-to-frame coherency in animations, I introduce a texture mapping-based stippling method. I execute a quadrangulation that captures the geometric structure of the surface, and obtain directional stipples by mapping a two-directional patterned texture onto each quad mesh. For even distribution of texture-mapped stipples on screen space, I propose a texture generation and mapping method that adjusts the number of stipples on the texture depending on the viewpoint.