Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superpixel Contracted Graph-Based Learning for Hyperspectral Image
  Classification   A central problem in hyperspectral image classification is obtaining high
classification accuracy when using a limited amount of labelled data. In this
paper we present a novel graph-based framework, which aims to tackle this
problem in the presence of large scale data input. Our approach utilises a
novel superpixel method, specifically designed for hyperspectral data, to
define meaningful local regions in an image, which with high probability share
the same classification label. We then extract spectral and spatial features
from these regions and use these to produce a contracted weighted
graph-representation, where each node represents a region rather than a pixel.
Our graph is then fed into a graph-based semi-supervised classifier which gives
the final classification. We show that using superpixels in a graph
representation is an effective tool for speeding up graphical classifiers
applied to hyperspectral images. We demonstrate through exhaustive quantitative
and qualitative results that our proposed method produces accurate
classifications when an incredibly small amount of labelled data is used. We
show that our approach mitigates the major drawbacks of existing approaches,
resulting in our approach outperforming several comparative state-of-the-art
techniques.

7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
29
The categories of this paper are: funct-an