Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Voxelized 3D Feature Aggregation for Multiview Detection   Multi-view detection incorporates multiple camera views to alleviate
occlusion in crowded scenes, where the state-of-the-art approaches adopt
homography transformations to project multi-view features to the ground plane.
However, we find that these 2D transformations do not take into account the
object's height, and with this neglection features along the vertical direction
of same object are likely not projected onto the same ground plane point,
leading to impure ground-plane features. To solve this problem, we propose VFA,
voxelized 3D feature aggregation, for feature transformation and aggregation in
multi-view detection. Specifically, we voxelize the 3D space, project the
voxels onto each camera view, and associate 2D features with these projected
voxels. This allows us to identify and then aggregate 2D features along the
same vertical line, alleviating projection distortions to a large extent.
Additionally, because different kinds of objects (human vs. cattle) have
different shapes on the ground plane, we introduce the oriented Gaussian
encoding to match such shapes, leading to increased accuracy and efficiency. We
perform experiments on multiview 2D detection and multiview 3D detection
problems. Results on four datasets (including a newly introduced MultiviewC
dataset) show that our system is very competitive compared with the
state-of-the-art approaches. %Our code and data will be open-sourced.Code and
MultiviewC are released at https://github.com/Robert-Mar/VFA.

2
The categories of this paper are: math
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
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The categories of this paper are: nlin
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The categories of this paper are: adap-org