Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Occlusion-aware Hand Pose Estimation Using Hierarchical Mixture Density
  Network   Learning and predicting the pose parameters of a 3D hand model given an
image, such as locations of hand joints, is challenging due to large viewpoint
changes and articulations, and severe self-occlusions exhibited particularly in
egocentric views. Both feature learning and prediction modeling have been
investigated to tackle the problem. Though effective, most existing
discriminative methods yield a single deterministic estimation of target poses.
Due to their single-value mapping intrinsic, they fail to adequately handle
self-occlusion problems, where occluded joints present multiple modes. In this
paper, we tackle the self-occlusion issue and provide a complete description of
observed poses given an input depth image by a novel method called hierarchical
mixture density networks (HMDN). The proposed method leverages the
state-of-the-art hand pose estimators based on Convolutional Neural Networks to
facilitate feature learning, while it models the multiple modes in a two-level
hierarchy to reconcile single-valued and multi-valued mapping in its output.
The whole framework with a mixture of two differentiable density functions is
naturally end-to-end trainable. In the experiments, HMDN produces interpretable
and diverse candidate samples, and significantly outperforms the
state-of-the-art methods on two benchmarks with occlusions, and performs
comparably on another benchmark free of occlusions.

16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th