Hybrid Skeletal-Surface Motion Graphs for Character Animation from 4D Performance Capture
Hybrid Skeletal-Surface Motion Graphs for Character Animation from 4D Performance Capture
复制标题
DOI：
10.1145/2699643
复制
发表时间：
2015-03
期刊：
影响因子：
--
通讯作者：
Peng Huang;M. Tejera;J. Collomosse;A. Hilton
中科院分区：
文献类型：
--
作者：
Peng Huang;M. Tejera;J. Collomosse;A. Hilton
我们提出了一种新的混合表示从4D性能捕获（4DPC）的数据，结合骨骼控制与表面运动图的角色动画。4DPC数据是来自多视图视频的动态表面形状和相关联外观的时间对准的3D网格序列重建。混合表示支持生产新的表面序列，满足用户指定的关键帧或目标骨骼运动的约束。运动图路径优化连接4DPC数据的片段以满足约束，同时在序列之间的过渡处保持合理的表面运动。使用学习的基于部分的拉普拉斯表面变形模型执行网格序列的时空编辑，以匹配序列之间的目标骨架运动和过渡。该方法是定量评估的三个4DPC数据集与各种服装风格。关键帧动画的结果表明，生产新的序列，满足时间和位置的限制小于1%的序列持续时间和路径长度。运动捕捉驱动的动画超过130个序列的语料库的评价表明，合成的运动准确地匹配的目标骨骼运动。骨架控制与表面运动图的组合扩展了可以产生的运动的范围和风格，同时保持来自捕获的表演的形状和外观的自然动态。
We present a novel hybrid representation for character animation from 4D Performance Capture (4DPC) data which combines skeletal control with surface motion graphs. 4DPC data are temporally aligned 3D mesh sequence reconstructions of the dynamic surface shape and associated appearance from multiple-view video. The hybrid representation supports the production of novel surface sequences which satisfy constraints from user-specified key-frames or a target skeletal motion. Motion graph path optimisation concatenates fragments of 4DPC data to satisfy the constraints while maintaining plausible surface motion at transitions between sequences. Space-time editing of the mesh sequence using a learned part-based Laplacian surface deformation model is performed to match the target skeletal motion and transition between sequences. The approach is quantitatively evaluated for three 4DPC datasets with a variety of clothing styles. Results for key-frame animation demonstrate production of novel sequences that satisfy constraints on timing and position of less than 1% of the sequence duration and path length. Evaluation of motion-capture-driven animation over a corpus of 130 sequences shows that the synthesised motion accurately matches the target skeletal motion. The combination of skeletal control with the surface motion graph extends the range and style of motion which can be produced while maintaining the natural dynamics of shape and appearance from the captured performance.