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CVPR
2003
IEEE
14 years 10 months ago
Document Image Enhancement Using Directional Wavelet
This paper proposes a novel algorithm to clean up a large collection of historical handwritten documents kept in the National Archives of Singapore. Due to the seepage of ink over...
Qian Wang, Tao Xia, Lida Li, Chew Lim Tan
COCO
2007
Springer
114views Algorithms» more  COCO 2007»
14 years 2 months ago
Directed Planar Reachability is in Unambiguous Log-Space
We make progress in understanding the complexity of the graph reachability problem in the context of unambiguous logarithmic space computation; a restricted form of nondeterminism....
Chris Bourke, Raghunath Tewari, N. V. Vinodchandra...
DEXAW
2000
IEEE
92views Database» more  DEXAW 2000»
14 years 1 months ago
Consistent Queries over Cardinal Directions across Different Levels of Detail
Current models for cardinal directions, such as north and northeast, are either point-based or region-based, but no models exist that apply equally, independent of the geometric d...
Roop K. Goyal, Max J. Egenhofer
ICIP
2001
IEEE
14 years 10 months ago
A directional, shift insensitive, low-redundancy, wavelet transform
Shift variance and poor directional selectivity, two major disadvantages of the discrete wavelet transform, have previously been circumvented either by using highly redundant, non...
Rutger L. van Spaendonck, Felix C. A. Fernandes, S...
DAC
2009
ACM
14 years 9 months ago
A robust and efficient harmonic balance (HB) using direct solution of HB Jacobian
In this paper we introduce a new method of performing direct solution of the harmonic balance Jacobian. For examples with moderate number of harmonics and moderate to strong nonli...
Amit Mehrotra, Abhishek Somani