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CGF
2011
14 years 10 months ago
Two-Level Grids for Ray Tracing on GPUs
We investigate the use of two-level nested grids as acceleration structure for ray tracing of dynamic scenes. We propose a massively parallel, sort-based construction algorithm an...
Javor Kalojanov, Markus Billeter, Philipp Slusalle...
SIGIR
2011
ACM
14 years 9 months ago
When documents are very long, BM25 fails!
We reveal that the Okapi BM25 retrieval function tends to overly penalize very long documents. To address this problem, we present a simple yet effective extension of BM25, namel...
Yuanhua Lv, ChengXiang Zhai
AAAI
2011
14 years 6 months ago
Lossy Conservative Update (LCU) Sketch: Succinct Approximate Count Storage
In this paper, we propose a variant of the conservativeupdate Count-Min sketch to further reduce the overestimation error incurred. Inspired by ideas from lossy counting, we divid...
Amit Goyal, Hal Daumé III
CVPR
2009
IEEE
17 years 1 months ago
Multiplicative Nonnegative Graph Embedding
In this paper, we study the problem of nonnegative graph embedding, originally investigated in [14] for reaping the benefits from both nonnegative data factorization and the spe...
Changhu Wang (University of Science and Technology...
CVPR
2007
IEEE
16 years 8 months ago
Using Stereo Matching for 2-D Face Recognition Across Pose
We propose using stereo matching for 2-D face recognition across pose. We match one 2-D query image to one 2-D gallery image without performing 3-D reconstruction. Then the cost o...
Carlos D. Castillo, David W. Jacobs