THESIS
2015
iii leaves, iv-xviii, 142 pages : illustrations (some color) ; 30 cm
Abstract
In modern societies, due to the explosively increasing amount of usage of multimedia
content, the security of multimedia content has become a very important
issue. Nowadays, there are two major types of technologies which can provide solutions
to the security problem. One is encryption and the other is watermarking.
This thesis is focused on a special kind of watermarking method called halftone
image watermarking. In halftone image watermarking, a type of method, which
we usually call them halftone visual watermarking (HVW), is used to embed a
secret pattern into halftone images (typically two) such that when the halftone
images are overlaid, the secret pattern will be revealed. Here, we firstly propose
a general formulation for HVW problems. Then we propose advanced HVW
metho...[
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In modern societies, due to the explosively increasing amount of usage of multimedia
content, the security of multimedia content has become a very important
issue. Nowadays, there are two major types of technologies which can provide solutions
to the security problem. One is encryption and the other is watermarking.
This thesis is focused on a special kind of watermarking method called halftone
image watermarking. In halftone image watermarking, a type of method, which
we usually call them halftone visual watermarking (HVW), is used to embed a
secret pattern into halftone images (typically two) such that when the halftone
images are overlaid, the secret pattern will be revealed. Here, we firstly propose
a general formulation for HVW problems. Then we propose advanced HVW
methods for both error diffused halftone images and dot diffused halftone images.
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