.: Click here to download :.
A possible domain for watermark embedding is that of the wavelet domain. The Discrete Wavelet Transform separates an image into a lower
resolution approximation image as well as horizontal, vertical and diagonal detail components. The process can then be repeated to
computes multiple “scale” wavelet decomposition. One of the many advantages over the wavelet transform is that that it is believed to
more accurately model aspects of the Human Visual System (HVS) as compared to the FFT or DCT. This allows us to use higher energy
watermarks in regions that the HVS is known to be less sensitive to, such as the high resolution detail bands. Embedding watermarks in
these regions allow us to increase the robustness of our watermark, at little to no additional impact on image quality. One of the most
straightforward techniques is the embedding of a CDMA sequence in the detail bands. The wavelet domain as well proved to be highly resistant
to both compression and noise, with minimal amounts of visual degradation. This is all the more impressive when one considers that the wavelet
technique described here is one of the most primitive currently known. More sophisticated wavelet-domain techniques will almost certainly improve
on both of these, and hopefully lower it’s computational requirements. The wavelet domain may be one of the most promising domains for digital
watermarking yet found.
We have developed a new scheme for the embedding of watermark sequence with high capacity, using a multilevel
approach for coefficients selection.
Index Terms: Matlab, source, code, wavelet, watermarking, capacity, human, visual, system, multilevel.
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Figure 1. Visible watermark |
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A simple and effective source code for High-Capacity Wavelet Based Watermarking. |
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Demo code (protected
P-files) available for performance evaluation. Matlab Wavelet Toolbox is required.
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Release |
Date |
Major features |
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1.0 |
2009.06.11 |
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We recommend to check the secure connection to PayPal, in order to avoid any fraud. This donation has to be considered an encouragement to improve the code itself. |
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High-Capacity Wavelet Based Watermarking. Click here for
your donation. In order to obtain the source code you
have to pay a little sum of money: 100 EUROS (less
than 140 U.S. Dollars). |
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Once you have done this, please email us luigi.rosa@tiscali.it As soon as possible (in a few days) you will receive our new release of High-Capacity Wavelet Based Watermarking. Alternatively, you can bestow using our banking coordinates:
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The authors have no relationship or partnership
with The Mathworks. All the code provided is written in Matlab
language (M-files and/or M-functions), with no dll or other
protected parts of code (P-files or executables). The code was
developed with Matlab 2006a. Matlab Wavelet Toolbox is required.
The code provided has to be considered "as is" and it is without any kind of warranty. The
authors deny any kind of warranty concerning the code as well
as any kind of responsibility for problems and damages which may
be caused by the use of the code itself including all parts of
the source code.
