Figure 2. LL2 sub-band is divided into sub-block-Discrete Wavelet Transform Method: A New Optimized Robust Digital Image Watermarking Scheme
| Main Authors: | Hassan Talebi, Behzad Poursoleyman |
|---|---|
| Format: | info Image |
| Bahasa: | eng |
| Terbitan: |
, 2012
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| Subjects: | |
| Online Access: |
https://www.edusoft.ro/brain/index.php/brain/issue/view/23 |
Daftar Isi:
- In the following experiments, two gray-level images with size of 512 by 512, “Baby” and “Hookah” are the test images. The binary image “IAU” with size of 32 by 32 is used in our simulations as a watermark. Figure 3 shows the watermark. In the experiments Haar wavelet filter was used for discrete wavelet transform. The level of wavelet decomposition (n) and the number of sub-blocks (K) were also assumed to be 2 and 16 respectively. The proposed watermarking algorithm is evaluated from the point view of embedded watermark transparency and robustness; the result of each is shown in next two sections.