标题: Compression and Direct Manipulation of Complex Blendshape Models [打印本页] 作者: 晃晃 时间: 2011-12-28 10:52 标题: Compression and Direct Manipulation of Complex Blendshape Models Compression and Direct Manipulation of Complex Blendshape Models
Jaewoo Seo Geoffrey Irvingy J. P. Lewisz Junyong Nohx
KAIST Weta Digital Weta Digital KAIST
Abstract
We present a method to compress complex blendshape models and
thereby enable interactive, hardware-accelerated animation of these
models. Facial blendshape models in production are typically large
in terms of both the resolution of the model and the number of tar-
get shapes. They are represented by a single huge blendshape ma-
trix, whose size presents a storage burden and prevents real-time
processing. To address this problem, we present a new matrix com-
pression scheme based on a hierarchically semi-separable (HSS)
representation with matrix block reordering. The compressed data
are also suitable for parallel processing. An efficient GPU imple-
mentation provides very fast feedback of the resulting animation.
Compared with the original data, our technique leads to a huge im-
provement in both storage and processing efficiency without incur-
ring any visual artifacts. As an application, we introduce an ex-
tended version of the direct manipulation method to control a large
number of facial blendshapes efficiently and intuitively.
