User profiles for Kesheng Wu

Kesheng Wu

Lawrence Berkeley National Laboratory
Verified email at lbl.gov
Cited by 9845

Fast connected-component labeling

L He, Y Chao, K Suzuki, K Wu - Pattern recognition, 2009 - Elsevier
Labeling of connected components in a binary image is one of the most fundamental
operations in pattern recognition: labeling is required whenever a computer needs to recognize …

Optimizing bitmap indices with efficient compression

K Wu, EJ Otoo, A Shoshani - ACM Transactions on Database Systems …, 2006 - dl.acm.org
Bitmap indices are efficient for answering queries on low-cardinality attributes. In this article,
we present a new compression scheme called Word-Aligned Hybrid (WAH) code that …

Thick-restart Lanczos method for large symmetric eigenvalue problems

K Wu, H Simon - SIAM Journal on Matrix Analysis and Applications, 2000 - SIAM
In this paper, we propose a restarted variant of the Lanczos method for symmetric eigenvalue
problems named the thick-restart Lanczos method. This new variant is able to retain an …

Optimizing two-pass connected-component labeling algorithms

K Wu, E Otoo, K Suzuki - Pattern Analysis and Applications, 2009 - Springer
We present two optimization strategies to improve connected-component labeling
algorithms. Taking together, they form an efficient two-pass labeling algorithm that is fast and …

Hello ADIOS: the challenges and lessons of developing leadership class I/O frameworks

…, K Schwan, A Shoshani, M Wolf, K Wu… - Concurrency and …, 2014 - Wiley Online Library
Applications running on leadership platforms are more and more bottlenecked by storage
input/output (I/O). In an effort to combat the increasing disparity between I/O throughput and …

Optimizing connected component labeling algorithms

K Wu, E Otoo, A Shoshani - Medical Imaging 2005: Image …, 2005 - spiedigitallibrary.org
This paper presents two new strategies that can be used to greatly improve the speed of
connected component labeling algorithms. To assign a label to a new object, most connected …

Solving the optimal trading trajectory problem using a quantum annealer

…, P Haghnegahdar, P Goddard, P Carr, K Wu… - Proceedings of the 8th …, 2015 - dl.acm.org
We solve a multi-period portfolio optimization problem using D-Wave Systems' quantum
annealer. We derive a formulation of the problem, discuss several possible integer encoding …

[HTML][HTML] Adios 2: The adaptable input output system. a framework for high-performance data management

…, N Thompson, S Tsutsumi, L Wan, M Wolf, K Wu… - SoftwareX, 2020 - Elsevier
We present ADIOS 2, the latest version of the Adaptable Input Output (I/O) System. ADIOS 2
addresses scientific data management needs ranging from scalable I/O in supercomputers, …

FastBit: interactively searching massive data

K Wu, S Ahern, EW Bethel, J Chen… - Journal of Physics …, 2009 - iopscience.iop.org
As scientific instruments and computer simulations produce more and more data, the task of
locating the essential information to gain insight becomes increasingly difficult. FastBit is an …

Compressing bitmap indexes for faster search operations

K Wu, EJ Otoo, A Shoshani - Proceedings 14th international …, 2002 - ieeexplore.ieee.org
We study the effects of compression on bitmap indexes. The main operations on the
bitmaps during query processing are bitwise logical operations. Using the general purpose …