User profiles for Kesheng Wu
Kesheng WuLawrence Berkeley National Laboratory Verified email at lbl.gov Cited by 9845 |
Fast connected-component labeling
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 …
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 …
we present a new compression scheme called Word-Aligned Hybrid (WAH) code that …
Thick-restart Lanczos method for large symmetric eigenvalue problems
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 …
problems named the thick-restart Lanczos method. This new variant is able to retain an …
Optimizing two-pass connected-component labeling algorithms
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 …
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
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 …
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 …
connected component labeling algorithms. To assign a label to a new object, most connected …
Solving the optimal trading trajectory problem using a quantum annealer
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 …
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
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, …
addresses scientific data management needs ranging from scalable I/O in supercomputers, …
FastBit: interactively searching massive data
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 …
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 …
bitmaps during query processing are bitwise logical operations. Using the general purpose …