【作者】 高岩； 陈敏刚； 王长波； 马利庄；

【Author】 Gao Yan~(1)),Chen Ming-gang~(2) 3)),Wang Chang-bo~(3)),Ma Li-zhuang~(4)) 1)(Institute of Software and Engineering,East China Normal University,Shanghai,200063) 2)(Institute of Information and Computer Engineering,Shanghai Jiao Tong University,Shanghai,221000) 3)(Public Service for Multimedia Industry,Shanghai Science and Technology Information Center,Shanghai 200235)

【机构】 华东师范大学软件学院； 上海交通大学计算机系； 上海市科技信息中心上海市多媒体公共服务平台；

【摘要】 2D动画是一个劳动密集型的过程,关键帧插值是其中的核心环节。现有2D形体渐变算法大多针对闭合的单一多边形,在应用到包含多个区域的复杂形体时,可能出现区域之间的重叠。本算法通过建立相对于父区域的局部坐标系,施加层次间的约束关系进行插值,可以消除父子区域插值过程中"运动"的不匹配现象。实验结果表明,该算法合成结果自然光滑,具有一定的实用价值。更多还原

【Abstract】 2D animation is a labor-intensive process,where keyframe interpolation is its key step.Most of the existing 2D shape-blending algorithms are designed for a single closed polygon.When they are applied to complex shape containing multiple regions,overlaps between different regions may occur.This algorithm iteratively constructs a local coordinate system relative to its parent region for each region.Then hierarchical constraint relation can be utilized to get rid of"motion"dis-match between parent-child areas.Experimental results show that our algorithm can synthesize naturally smooth in-betweens and is efficient enough for practical demands.更多还原