Gou xin-ke

Work place: College of Electrical and Information Engineering Lanzhou Universityof Technology Lanzhou, China

E-mail: 29433404@qq.com

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Biography

Author Articles
Study on Algorithm of Digital Image Watermarking Based on DWT

By Gou xin-ke Lu ran-ni

DOI: https://doi.org/10.5815/ijeme.2011.01.04, Pub. Date: 29 Jul. 2011

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.

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