Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: AlphaNet: An Attention Guided Deep Network for Automatic Image Matting   In this paper, we propose an end to end solution for image matting i.e
high-precision extraction of foreground objects from natural images. Image
matting and background detection can be achieved easily through chroma keying
in a studio setting when the background is either pure green or blue.
Nonetheless, image matting in natural scenes with complex and uneven depth
backgrounds remains a tedious task that requires human intervention. To achieve
complete automatic foreground extraction in natural scenes, we propose a method
that assimilates semantic segmentation and deep image matting processes into a
single network to generate detailed semantic mattes for image composition task.
The contribution of our proposed method is two-fold, firstly it can be
interpreted as a fully automated semantic image matting method and secondly as
a refinement of existing semantic segmentation models. We propose a novel model
architecture as a combination of segmentation and matting that unifies the
function of upsampling and downsampling operators with the notion of attention.
As shown in our work, attention guided downsampling and upsampling can extract
high-quality boundary details, unlike other normal downsampling and upsampling
techniques. For achieving the same, we utilized an attention guided
encoder-decoder framework which does unsupervised learning for generating an
attention map adaptively from the data to serve and direct the upsampling and
downsampling operators. We also construct a fashion e-commerce focused dataset
with high-quality alpha mattes to facilitate the training and evaluation for
image matting.

28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph