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» Algorithms on negatively curved spaces
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ICASSP
2011
IEEE
13 years 1 months ago
A robust lip tracking algorithm using localized color active contours and deformable models
Lip tracking is crucial to the success of a lipreading recognition system. This paper presents a robust lip tracking algorithm using localized color active contours and deformable...
Xin Liu, Yiu-ming Cheung
STOC
2005
ACM
118views Algorithms» more  STOC 2005»
14 years 10 months ago
Euclidean distortion and the sparsest cut
We prove that every n-point metric space of negative type (and, in particular, every npoint subset of L1) embeds into a Euclidean space with distortion O( log n ? log log n), a r...
Sanjeev Arora, James R. Lee, Assaf Naor
INFOCOM
2012
IEEE
12 years 10 days ago
HAWK: An unmanned mini helicopter-based aerial wireless kit for localization
—This paper presents a fully functional and highly portable mini Unmanned Aerial Vehicle (UAV) system, HAWK, for conducting aerial localization. HAWK is a programmable mini helic...
Zhongli Liu, Yinjie Chen, Benyuan Liu, Chengyu Cao...
CORR
2008
Springer
138views Education» more  CORR 2008»
13 years 10 months ago
The implicit equation of a canal surface
A canal surface is an envelope of a one parameter family of spheres. In this paper we present an efficient algorithm for computing the implicit equation of a canal surface generat...
Marc Dohm, Severinas Zube
ICDE
2003
IEEE
97views Database» more  ICDE 2003»
14 years 11 months ago
Spectral LPM: An Optimal Locality-Preserving Mapping using the Spectral (not Fractal) Order
For the past two decades, fractals (e.g., the Hilbert and Peano space-filling curves) have been considered the natural method for providing a locality-preserving mapping. The idea...
Mohamed F. Mokbel, Walid G. Aref, Ananth Grama