Elektronika 2009-11.pdf - Instytut Systemów Elektronicznych

conducting wide range of experiments involving different types
of message embedding, diverse attacks (employing image
processing algorithms) and steganalysis with the use of popular
methods. Although the main purpose of VSL is to provide
efficient yet easy tool for scientists and students, it can be
used for learning and extended by everyone. With the help of
VSL, any new steganographic/steganalytic/watermarking
method may be investigated. Thanks to that, people can be
more aware of current information hiding problems, which is
instantly gaining more popularity. It is an important aspect, especially
nowadays, when successive privacy issues are continually
emerging and civil liberties and rights are more and
more often not taken into consideration.
Fig. 4. Example flow of distortion modeling
Rys. 4. Przykład przebiegu modelowania zakłóceń
Fig. 5. Example flow of parallel message embedding with two
methods
Rys. 5. Przykładowy przebieg równoległego osadzania informacji
dwiema metodami
Another scenario is shown in Fig. 4. Cover object is
processed in an iterative manner. In every cycle it is used for
embedding, distorted and stored. Finally, the message is recovered,
so the robustness could be tested. On the right side
the Display module window is presented. The next figure
(Fig. 5) demonstrates a concept of parallel processing in
which many operations on different sets of images can be
done separately at one time for easy and clear further comparison.
Example usage of this kind of processing could be
performing embedding on two different sets of images: e.g.
for training and testing classifier or comparing results of embedding
with same technique but different parameters.
The experiments presented in this section as simplified
flows do not exhaust the possible field of applications of the
VSL. An open architecture of the environment and an idea of
flexible connections gives the possibility to create many more
schemes of processing, employing lots of different modules.
According to the assumption presented in the beginning, the
architecture of VSL allows many extra modules to be attached
to the main application. Thanks to open VSL API and
popular Java programming language one can create his own
steganographic/ steganalysis plugin and profit from the automatic
processing.
Summary
Proposed Virtual Steganographic Laboratory is a novel approach
to steganographic experiments performed on digital
images. It gives scientists and students a powerful tool for
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