Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sketch-R2CNN: An Attentive Network for Vector Sketch Recognition   Freehand sketching is a dynamic process where points are sequentially sampled
and grouped as strokes for sketch acquisition on electronic devices. To
recognize a sketched object, most existing methods discard such important
temporal ordering and grouping information from human and simply rasterize
sketches into binary images for classification. In this paper, we propose a
novel single-branch attentive network architecture RNN-Rasterization-CNN
(Sketch-R2CNN for short) to fully leverage the dynamics in sketches for
recognition. Sketch-R2CNN takes as input only a vector sketch with grouped
sequences of points, and uses an RNN for stroke attention estimation in the
vector space and a CNN for 2D feature extraction in the pixel space
respectively. To bridge the gap between these two spaces in neural networks, we
propose a neural line rasterization module to convert the vector sketch along
with the attention estimated by RNN into a bitmap image, which is subsequently
consumed by CNN. The neural line rasterization module is designed in a
differentiable way to yield a unified pipeline for end-to-end learning. We
perform experiments on existing large-scale sketch recognition benchmarks and
show that by exploiting the sketch dynamics with the attention mechanism, our
method is more robust and achieves better performance than the state-of-the-art
methods.

9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
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The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat