1,545 research outputs found
Client-Driven Content Extraction Associated with Table
The goal of the project is to extract content within table in document images
based on learnt patterns. Real-world users i.e., clients first provide a set of
key fields within the table which they think are important. These are first
used to represent the graph where nodes are labelled with semantics including
other features and edges are attributed with relations. Attributed relational
graph (ARG) is then employed to mine similar graphs from a document image. Each
mined graph will represent an item within the table, and hence a set of such
graphs will compose a table. We have validated the concept by using a
real-world industrial problem
Handwritten and Printed Text Separation in Real Document
The aim of the paper is to separate handwritten and printed text from a real
document embedded with noise, graphics including annotations. Relying on
run-length smoothing algorithm (RLSA), the extracted pseudo-lines and
pseudo-words are used as basic blocks for classification. To handle this, a
multi-class support vector machine (SVM) with Gaussian kernel performs a first
labelling of each pseudo-word including the study of local neighbourhood. It
then propagates the context between neighbours so that we can correct possible
labelling errors. Considering running time complexity issue, we propose linear
complexity methods where we use k-NN with constraint. When using a kd-tree, it
is almost linearly proportional to the number of pseudo-words. The performance
of our system is close to 90%, even when very small learning dataset where
samples are basically composed of complex administrative documents.Comment: Machine Vision Applications (2013
Radial Flow from Electromagnetic Probes and Signal of Quark Gluon Plasma
A first attempt has been made to extract the evolution of radial flow from
the analysis of the experimental data on electromagnetic probes experimentally
measured at SPS and RHIC energies. The spectra of photons and dileptons
measured by WA98 and NA60 collaborations respectively at CERN-SPS and the
photon spectra obtained by PHENIX collaboration at BNL-RHIC have been used to
constrain the theoretical models, rendering the outcome of the analysis largely
model independent. We argue that the variation of the radial velocity with
invariant mass is indicative of a phase transition from initially produced
partons to hadrons at SPS and RHIC energies.Comment: One LaTeX and 9 eps files, to appear in Phys. Rev.
Paramagnetic magnetization signals and curious metastable behaviour in field-cooled magnetization of a single crystal of superconductor 2H-NbSe2
We present here some newer characteristics pertaining to paramagnetic
Meissner effect like response in a single crystal of the low Tc superconducting
compound 2H-NbSe2 via a detailed study of effects of perturbation on the
field-cooled magnetization response. In the temperature range, where an
anomalous paramagnetic magnetization occurs, the field-cooled magnetization
response is found to be highly metastable: it displays a curious tendency to
switch randomly from a given paramagnetic value to a diamagnetic or to a
different paramagnetic value, when the system is perturbed by an impulse of an
externally applied ac field. The new facets revealed in a single crystal of
2H-NbSe2 surprisingly bear a marked resemblance with the characteristics of
magnetization behaviour anticipated for the giant vortex states with multiple
flux quanta predicted to occur in mesoscopic-sized superconducting specimen and
possible transitions amongst such states.Comment: 12 pages, 9 figures, submitted to Journal of Physics: Condensed
Matte
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