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SIGMOD
2004
ACM
126views Database» more  SIGMOD 2004»
14 years 7 months ago
Indexing Spatio-Temporal Trajectories with Chebyshev Polynomials
In this paper, we attempt to approximate and index a ddimensional (d 1) spatio-temporal trajectory with a low order continuous polynomial. There are many possible ways to choose ...
Yuhan Cai, Raymond T. Ng
ENTCS
2002
61views more  ENTCS 2002»
13 years 7 months ago
Effectively Absolute Continuity and Effective Jordan Decomposability
Classically, any absolute continuous real function is of bounded variation and hence can always be expressed as a difference of two increasing continuous functions (socalled Jorda...
Xizhong Zheng, Robert Rettinger, Burchard von Brau...
CVPR
2007
IEEE
14 years 9 months ago
A minimal solution to the autocalibration of radial distortion
Epipolar geometry and relative camera pose computation are examples of tasks which can be formulated as minimal problems and solved from a minimal number of image points. Finding ...
Tomás Pajdla, Zuzana Kukelova
ICIP
2004
IEEE
14 years 9 months ago
Camera calibration without metric information using 1D objects
This paper addresses the problem of calibrating a pin-hole camera from images of 1D objects. Assuming a unit aspect ratio and zero skew, we introduce a novel and simple approach t...
Xiaochun Cao, Hassan Foroosh
ICDT
1997
ACM
89views Database» more  ICDT 1997»
13 years 11 months ago
On Topological Elementary Equivalence of Spatial Databases
We consider spatial databases and queries definable using first-order logic and real polynomial inequalities. We are interested in topological queries: queries whose result only ...
Bart Kuijpers, Jan Paredaens, Jan Van den Bussche