Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Webcam-based Eye Gaze Tracking under Natural Head Movement   This manuscript investigates and proposes a visual gaze tracker that tackles
the problem using only an ordinary web camera and no prior knowledge in any
sense (scene set-up, camera intrinsic and/or extrinsic parameters). The tracker
we propose is based on the observation that our desire to grant the freedom of
natural head movement to the user requires 3D modeling of the scene set-up.
Although, using a single low resolution web camera bounds us in dimensions (no
depth can be recovered), we propose ways to cope with this drawback and model
the scene in front of the user. We tackle this three-dimensional problem by
realizing that it can be viewed as series of two-dimensional special cases.
Then, we propose a procedure that treats each movement of the user's head as a
special two-dimensional case, hence reducing the complexity of the problem back
to two dimensions. Furthermore, the proposed tracker is calibration free and
discards this tedious part of all previously mentioned trackers.
  Experimental results show that the proposed tracker achieves good results,
given the restrictions on it. We can report that the tracker commits a mean
error of (56.95, 70.82) pixels in x and y direction, respectively, when the
user's head is as static as possible (no chin-rests are used). Furthermore, we
can report that the proposed tracker commits a mean error of (87.18, 103.86)
pixels in x and y direction, respectively, under natural head movement.

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The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
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The categories of this paper are: nlin
18
The categories of this paper are: econ
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The categories of this paper are: physics
26
The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg