Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: FontCode: Embedding Information in Text Documents using Glyph
  Perturbation   We introduce FontCode, an information embedding technique for text documents.
Provided a text document with specific fonts, our method embeds user-specified
information in the text by perturbing the glyphs of text characters while
preserving the text content. We devise an algorithm to chooses unobtrusive yet
machine-recognizable glyph perturbations, leveraging a recently developed
generative model that alters the glyphs of each character continuously on a
font manifold. We then introduce an algorithm that embeds a user-provided
message in the text document and produces an encoded document whose appearance
is minimally perturbed from the original document. We also present a glyph
recognition method that recovers the embedded information from an encoded
document stored as a vector graphic or pixel image, or even on a printed paper.
In addition, we introduce a new error-correction coding scheme that rectifies a
certain number of recognition errors. Lastly, we demonstrate that our technique
enables a wide array of applications, using it as a text document metadata
holder, an unobtrusive optical barcode, a cryptographic message embedding
scheme, and a text document signature.

18
The categories of this paper are: econ
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc