Study on Algorithm of Digital Image Watermarking Based on DWT
Автор: Gou xin-ke, Lu ran-ni
Журнал: International Journal of Education and Management Engineering(IJEME) @ijeme
Статья в выпуске: 1 vol.1, 2011 года.
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In this article, watermarking algorithm is studied using digital watermarking technology based on the discrete wavelet (DWT) multi-resolution decomposition algorithm. Three-level wavelet decomposition is employed so that images are divided into three serial sub-graphs with high frequency band and one sub-graph with low frequency band. Since low-frequency information is more sensitive to human eyes than high-frequency information, watermarking is embedded into the high-frequency coefficients of the wavelet image. In our experiment, watermarking information is embedded into the original images by Matlab simulation. Besides, salt and pepper noise, Gaussian low-pass filter, amplifying 200% after narrowing 50% attack as well as JPEG coding are used to test the algorithm. Results show that our algorithm is robust and the visual effect is satisfactory.
Image, MATLAB, Discrete wavelet transform, Robustness
Короткий адрес: https://sciup.org/15013562
IDR: 15013562
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