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1998
109views more  TIP 1998»
13 years 8 months ago
Optimum design of chamfer distance transforms
—The distance transform has found many applications in image analysis. Chamfer distance transforms are a class of discrete algorithms that offer a good approximation to the desir...
Muhammad Akmal Butt, Petros Maragos
STACS
2007
Springer
14 years 2 months ago
Small Space Representations for Metric Min-Sum k -Clustering and Their Applications
The min-sum k-clustering problem is to partition a metric space (P, d) into k clusters C1, . . . , Ck ⊆ P such that k i=1 p,q∈Ci d(p, q) is minimized. We show the first effi...
Artur Czumaj, Christian Sohler
FSTTCS
2004
Springer
14 years 1 months ago
Testing Geometric Convexity
We consider the problem of determining whether a given set S in Rn is approximately convex, i.e., if there is a convex set K ∈ Rn such that the volume of their symmetric differe...
Luis Rademacher, Santosh Vempala
ASIACRYPT
2004
Springer
14 years 1 months ago
Eliminating Random Permutation Oracles in the Even-Mansour Cipher
Abstract. Even and Mansour [EM97] proposed a block cipher construction that takes a publicly computable random permutation oracle P and XORs different keys prior to and after appl...
Craig Gentry, Zulfikar Ramzan
IWNAS
2006
IEEE
14 years 2 months ago
TEA: Transmission Error Approximation for Distance Estimation between Two Zigbee Devices
This paper proposes a simple and costeffective method named Transmission Error Approximation (TEA) for estimating the distance between two Zigbee devices. The idea is to measure a...
Weijun Xiao, Yan Sun, Yinan Liu, Qing Yang