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COMBINATORICA
2004
127views more  COMBINATORICA 2004»
15 years 6 months ago
On Infinite Cycles I
We extend the basic theory concerning the cycle space of a finite graph to infinite locally finite graphs, using as infinite cycles the homeomorphic images of the unit circle in t...
Reinhard Diestel, Daniela Kühn
TIT
2010
80views Education» more  TIT 2010»
15 years 1 months ago
Optical orthogonal signature pattern codes with maximum collision parameter 2 and weight 4
An optical orthogonal signature pattern code (OOSPC) finds application in transmitting 2-dimensional images through multicore fiber in code-division multiple-access (CDMA) communic...
Masanori Sawa
IPL
2011
94views more  IPL 2011»
14 years 10 months ago
Lower bounds for context-free grammars
Ellul, Krawetz, Shallit and Wang prove an exponential lower bound on the size of any context-free grammar generating the language of all permutations over some alphabet. We genera...
Yuval Filmus
CVPR
2003
IEEE
16 years 8 months ago
Methods and Geometry for Plane-Based Self-Calibration
Abstract. We consider the problem of camera selfcalibration, from images of a planar object with unknown Euclidean structure. The general case of possibly varying focal length is a...
Pierre Gurdjos, Peter Sturm
CVPR
2003
IEEE
16 years 8 months ago
Recognizing Objects in Adversarial Clutter: Breaking a Visual CAPTCHA
In this paper we explore object recognition in clutter. We test our object recognition techniques on Gimpy and EZGimpy, examples of visual CAPTCHAs. A CAPTCHA ("Completely Au...
Greg Mori, Jitendra Malik