This figure shows two images of an exhibition
crowd scene that has 1 K articulated characters. All
the characters and the scene have 83 M triangles. Our
method achieves 46 frames per second (fps) on average
for this model with 0.5 pixel-of-error (PoE) in a 1280
by 720 HD screen resolution.
Abstract
We present a novel, View-Dependent Representation of Articulated Models (VDR-AM), and show its main benefits
in the context of view-dependent rendering integrated with occlusion culling for large-scale crowd scenes. In order
to provide varying resolutions on each animated, articulated model, we propose to use a cluster hierarchy in the
VDR-AM for an articulated model. The cluster hierarchy serves as a dual representation for both view-dependent
rendering and occlusion culling. For a high-performance view-dependent rendering and occlusion culling, we
construct each cluster of the cluster hierarchy to contain a spatially coherent portion of the mesh that also has
similar simplification errors. To achieve our goal, we present an error-aware clustering method for articulated
models. We also identify a subset of animation poses that well represents the original pose data and perform the
well-known quadrics-based simplification to efficiently compute our representation, while achieving a high quality
simplification. At runtime, we choose a LOD cut from the cluster hierarchy given a user specified error bound in
the screen space and render all the visible clusters in the LOD cut. We implement our method in GPU and achieve
interactive performance (e.g., 40 frames per second) for large-scale crowd scenes that consist up to thousands of
articulated models and 242 M triangles, without noticeable visual artifacts.
@ARTICLE{Claudio2013,
author = {Claudio, Pio and Kim, DoHyeong and Kim,Tae-Joon and Yoon,Sung-eui},
editor = {Skala, V.},
title = {VDR-AM: View-Dependent Representation of Articulated Models},
journal = {Journal of WSCG},
volume = {21},
number = {3},
year = {2013},
publisher = {UNION Agency-Science Press},
issn = {1213-6972},
conference = {WSCG'2013 - 21st International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision'2013}
}
@inproceedings{Kim:2010:IVR:1900354.1900414,
author = {Kim, Dohyeong and Claudio, Pio and Kim, Tae-Joon and Yoon, Sung Eui},
title = {Interactive View-dependent Rendering with Culling for Articulated Models in Crowd Scenes},
booktitle = {ACM SIGGRAPH ASIA 2010 Posters},
series = {SA '10},
year = {2010},
isbn = {978-1-4503-0524-2},
location = {Seoul, Republic of Korea},
pages = {54:1--54:1},
articleno = {54},
numpages = {1},
url = {http://doi.acm.org/10.1145/1900354.1900414},
doi = {10.1145/1900354.1900414},
acmid = {1900414},
publisher = {ACM},
address = {New York, NY, USA},
}
