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Drafting 2D Characters with Primitive Shape Scaffolds

Authors:
Golam Ashraf
Kaiser Md. Nahiduzzaman
Nguyen Kim Hai Le
Li Mo

Keywords: character design, shape scaffold, deformation, image warping

Abstract:
Abstract - Primitive shapes, namely circle, triangle and square, form the basis of design and cognition of a large number of objects we find around us. Inspired by this, we have recently proposed a primitive shape field representation that simplifies detailed convex shapes. In this paper, we apply this representation in image annotation, character drafting, and repurposing of 2D artwork. We implement a character design system that allows artists to sketch rough drafts using body-part scaffolding and then retarget a pre-annotated library image onto the draft mannequin. We also compare this algorithm with Free Form Deformation lattice deformers. This allows them to quickly create an estimate of the desired character without spending effort in inking and painting. The key technical algorithms presented here have a wide range of applications, such as structured shape design (humanoid cartoons, vehicles, consumer products, etc.), content retrieval, morphing, cartoonification/stylization, and procedural detailing (textures/shapes). The key technical contributions of this paper are vector fitting of strokes and a novel primitive cage field image-warping algorithm to warp articulated characters.

Pages: 27 to 33

Copyright: Copyright (c) IARIA, 2010

Publication date: November 21, 2010

Published in: conference

ISSN: 2308-4162

ISBN: 978-1-61208-110-6

Location: Lisbon, Portugal

Dates: from November 21, 2010 to November 26, 2010