769 research outputs found
Scale Selective Extended Local Binary Pattern for Texture Classification
In this paper, we propose a new texture descriptor, scale selective extended
local binary pattern (SSELBP), to characterize texture images with scale
variations. We first utilize multi-scale extended local binary patterns (ELBP)
with rotation-invariant and uniform mappings to capture robust local micro- and
macro-features. Then, we build a scale space using Gaussian filters and
calculate the histogram of multi-scale ELBPs for the image at each scale.
Finally, we select the maximum values from the corresponding bins of
multi-scale ELBP histograms at different scales as scale-invariant features. A
comprehensive evaluation on public texture databases (KTH-TIPS and UMD) shows
that the proposed SSELBP has high accuracy comparable to state-of-the-art
texture descriptors on gray-scale-, rotation-, and scale-invariant texture
classification but uses only one-third of the feature dimension.Comment: IEEE International Conference on Acoustics, Speech and Signal
Processing (ICASSP), 201
Anyon exclusions statistics on surfaces with gapped boundaries
An anyon exclusion statistics, which generalizes the Bose-Einstein and
Fermi-Dirac statistics of bosons and fermions, was proposed by Haldane[1]. The
relevant past studies had considered only anyon systems without any physical
boundary but boundaries often appear in real-life materials. When fusion of
anyons is involved, certain `pseudo-species' anyons appear in the exotic
statistical weights of non-Abelian anyon systems; however, the meaning and
significance of pseudo-species remains an open problem. In this paper, we
propose an extended anyon exclusion statistics on surfaces with gapped
boundaries, introducing mutual exclusion statistics between anyons as well as
the boundary components. Motivated by Refs. [2, 3], we present a formula for
the statistical weight of many-anyon states obeying the proposed statistics. We
develop a systematic basis construction for non-Abelian anyons on any Riemann
surfaces with gapped boundaries. From the basis construction, we have a
standard way to read off a canonical set of statistics parameters and hence
write down the extended statistical weight of the anyon system being studied.
The basis construction reveals the meaning of pseudo-species. A pseudo-species
has different `excitation' modes, each corresponding to an anyon species. The
`excitation' modes of pseudo-species corresponds to good quantum numbers of
subsystems of a non-Abelian anyon system. This is important because often
(e.g., in topological quantum computing) we may be concerned about only the
entanglement between such subsystems.Comment: 36 pages, 14 figure
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