Robust And Imperceptible Digital Video Watermarking Techniques
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Date
2011-02
Authors
Al-Taweel, Sadik Ali Murshid
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
The massive production of image and video materials on the Computer Mediated Systems
(CMS) over the Internet has created a challenge in the area of copyright protection. Numerous
illegal copies have been made and efforts on proving the owner copyright of those media are
indeed a challenging task. Digital watermarking is a solution that can be used to prove the ownership/
copyright by embedding watermark (owner, information) into the image/video. Later,
the embedded watermark is used as a proof and evidence for the real ownership. Thus, the
embedded watermark should be robust and imperceptible against any attempt of removing and
alteration on it. However, guaranteeing against any alteration as to preserve the originality is
one of the major hurdles in image and video watermarking system. The embedded watermark
in the image is easily distorted / altered from activities such as geometric manipulation, image
processing process, compression process and noises within the image. Those (also being referred
to as attacks) has caused the extracted watermark not similar to the original one and thus
denying ownership claiming. This study presents four watermarking techniques that are robust
and imperceptible against attacks. The first scheme is called Spread Spectrum Frequency Domain.
This scheme uses modulated spread spectrum sequence in representing the watermark.
In the embedding process, two frequency domain embedding process called Spread Spectrum
Discrete Cosine transform (SSDCT) and Spread Spectrum Wavelet transform (SSDWT) are
presented. Both schemes embedded the transformed coefficients watermark into the high frequency
of transform coefficient of the selected frames.
Description
Keywords
Robust And Imperceptible , Digital Video Watermarking