Character Skin Deformation: A Survey

Abstract

Skin deformation plays a very important role in creating realistic character animation. A lot of research efforts have been devoted to the development of skin deformation techniques. The paper provides a survey of various techniques and classify them into three major categories; surface-based, volume-based and curve-based techniques. Surface based techniques are divided into purely geometric and physics-based. Volume-based techniques are grouped into purely geometric, anatomy based, and physics-based. Curve-based techniques are classified as free form deformation, purely geometric sweep deformation, cross section method; physics based sweep deformation, static curve-based skin deformation, and dynamic curve-based skin deformation. For each group, a representative technique is introduced. The strengths and weaknesses of each technique are analysed. Finally, some future research directions are discussed.

Application of Lie Algebras in Computer Animation

“…Note that, if the move does not go through the identity, the continuous logarithmic lift always exists. If the move 1 C assume that a continuously differentiable (that is, the velocity is continuous), then the continuous logarithmic lift exists.…”

“…Many works have been conducted in this direction, including skinning [1][2], thinning [3], cage-based deformation [4], motion analysis and compression [5][6][7]. This paper focuses on a Lie theoretic aspect of the mathematical applications in computer graphics.…”

Shape modeling for animated characters using ordinary differential equations

“…Skin deformation techniques can be classified into three major categories: surface-based, volume-based and curve-based techniques [5].…”

Mathematical basics of motion and deformation in computer graphics

“…These kinds of practical demands therefore have inspired graphics researchers to explore new mathematical concepts and/or tools. Many works have been conducted in this direction, including skinning [Chaudhry10], cage-based deformation [Nieto13], motion analysis and compression ( [Alexa02], for instance).…”