关键词: 卡通动画, 2.5D图形, 扩散曲线, 着色技术

Abstract: 2.5D graphics is one of the key technologies for creating computer cartoon animation. This paper proposes a novel method, colored double-sided 2.5D graphics, to generate 2.5D graphics with color transition based on a set of vector-
graphics-primitives defined by users. The basic idea behind this method is the diffusion curves technique for the double-sided 2.5D graphics. The method first takes a group of curves with pre-defined colors as its source data, and then performs a classic 2.5D folding operator on the source curves with several user-specified parameters. A color diffusing process is employed in each local area limited by curves on front and back 2.5D local layers respectively. Once the diffusing processes are finished, a 2.5D image with elegant color transition can finally be obtained. The results show that the colored double-
sided 2.5D graphics method can work well with various source data and can generates both static 2.5D images and 2.5D cartoon animations.

Key words: cartoon animation, 2.5D graphics, diffusion curves, coloring method