关键词: 对白框, 傅里叶级数, 参数曲线, 动画, 卡通

Abstract: This paper proposes a new periodic dynamic speech balloons generation method, which provides a new feature to show mood expressions in comics, games and some interactive applications. It presents a mathematic model, which represents a dynamic speech-balloon as the sum of a fixed base curve and a dynamic curve. Every control point of the dynamic curve is represented by a set of Fourier coefficients, and hence the periodic dynamics can be generated by Fourier synthesis. Then, it shows various rendering styles for dynamic speech-balloons rendering in real-time. In addition, it introduces a brush tool with various dynamic templates to intuitively create and edit the mathematic models of dynamic speech balloons. Finally, it presents a prototype system and experimental results demonstrate the effectiveness of the proposed method.

Key words: speech balloons, Fourier series, parametric curves, animation, cartoon