Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Digital interferometric demodulation of Placido mires applied to corneal
  topography   This paper presents a novel digital interferometric method to demodulate
Placido fringe patterns. This is a synchronous method which uses a
computer-stored conic-wavefront as demodulating reference. Here we focus on the
experimental aspects to phase-demodulate Placido mires applied to corneal
topography. This synchronous method is applied to two topographic Placido
images and their de-modulated corneal-slope deformation is estimated. This
conic-interferometric method is highly robust against typical "noise" signals
in Placido topography such as: reflected eyelashes and iris structures. That is
because the eyelashes and the iris structures are high frequency "noisy"
signals corrupting the reflected Placido mire, so they are filtered-out by this
method. Digital synchronous interferometry is here applied for the first time
to demodulate corneal topographic concentric-rings images (Patent pending at
the USPTO).

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The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: stat
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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: econ
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The categories of this paper are: q-bio
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The categories of this paper are: quant-ph