Gou xin-ke; Lu ran-ni

International Journal of Education and Management Engineering (IJEME)

IJEME Vol. 1, No. 1, 29 Jul. 2011

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Study on Algorithm of Digital Image Watermarking Based on DWT

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Author(s)

Gou xin-ke ^1,* Lu ran-ni ¹

1. Lanzhou Universityof Technology Lanzhou, China

* Corresponding author.

DOI: https://doi.org/10.5815/ijeme.2011.01.04

Received: 21 Apr. 2011 / Revised: 18 May 2011 / Accepted: 28 Jun. 2011 / Published: 29 Jul. 2011

Index Terms

Image, MATLAB, Discrete wavelet transform, Robustness

Abstract

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.

Cite This Paper

Gou xin-ke,Lu ran-ni,"Study on Algorithm of Digital Image Watermarking Based on DWT", IJEME, vol.1, no.1, pp.20-26, 2011. DOI: 10.5815/ijeme.2011.01.04

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