Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exploring Spatial Significance via Hybrid Pyramidal Graph Network for
  Vehicle Re-identification   Existing vehicle re-identification methods commonly use spatial pooling
operations to aggregate feature maps extracted via off-the-shelf backbone
networks. They ignore exploring the spatial significance of feature maps,
eventually degrading the vehicle re-identification performance. In this paper,
firstly, an innovative spatial graph network (SGN) is proposed to elaborately
explore the spatial significance of feature maps. The SGN stacks multiple
spatial graphs (SGs). Each SG assigns feature map's elements as nodes and
utilizes spatial neighborhood relationships to determine edges among nodes.
During the SGN's propagation, each node and its spatial neighbors on an SG are
aggregated to the next SG. On the next SG, each aggregated node is re-weighted
with a learnable parameter to find the significance at the corresponding
location. Secondly, a novel pyramidal graph network (PGN) is designed to
comprehensively explore the spatial significance of feature maps at multiple
scales. The PGN organizes multiple SGNs in a pyramidal manner and makes each
SGN handles feature maps of a specific scale. Finally, a hybrid pyramidal graph
network (HPGN) is developed by embedding the PGN behind a ResNet-50 based
backbone network. Extensive experiments on three large scale vehicle databases
(i.e., VeRi776, VehicleID, and VeRi-Wild) demonstrate that the proposed HPGN is
superior to state-of-the-art vehicle re-identification approaches.

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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
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The categories of this paper are: ao-sci
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The categories of this paper are: cond-mat
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The categories of this paper are: nlin
10
The categories of this paper are: q-bio
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: patt-sol