Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: HSR: L1/2 Regularized Sparse Representation for Fast Face Recognition
  using Hierarchical Feature Selection   In this paper, we propose a novel method for fast face recognition called
L1/2 Regularized Sparse Representation using Hierarchical Feature Selection
(HSR). By employing hierarchical feature selection, we can compress the scale
and dimension of global dictionary, which directly contributes to the decrease
of computational cost in sparse representation that our approach is strongly
rooted in. It consists of Gabor wavelets and Extreme Learning Machine
Auto-Encoder (ELM-AE) hierarchically. For Gabor wavelets part, local features
can be extracted at multiple scales and orientations to form Gabor-feature
based image, which in turn improves the recognition rate. Besides, in the
presence of occluded face image, the scale of Gabor-feature based global
dictionary can be compressed accordingly because redundancies exist in
Gabor-feature based occlusion dictionary. For ELM-AE part, the dimension of
Gabor-feature based global dictionary can be compressed because
high-dimensional face images can be rapidly represented by low-dimensional
feature. By introducing L1/2 regularization, our approach can produce sparser
and more robust representation compared to regularized Sparse Representation
based Classification (SRC), which also contributes to the decrease of the
computational cost in sparse representation. In comparison with related work
such as SRC and Gabor-feature based SRC (GSRC), experimental results on a
variety of face databases demonstrate the great advantage of our method for
computational cost. Moreover, we also achieve approximate or even better
recognition rate.

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The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ph
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The categories of this paper are: physics
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The categories of this paper are: math
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: quant-ph
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The categories of this paper are: nlin
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol