| DWT-Based Robust Color Image Watermarking Scheme |
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| 作者姓名： | 刘连山 李人厚 高琦 |
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| 作者单位： | [1]School of Electronics and Information Engineering, Xi＇ an Jiaotong University, Xi＇ an 710049, China [2]College of Information Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China |
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| 摘 要： | A scheme of embedding an encrypted watermark into the green component of a color image is proposed. The embedding process is implemented in the discrete wavelet transformation （DWT） domain, The original binary watermark image is firstly encrypted through scrambling technique, and then spread with two orthogonal pseudo-random sequences whose mean values are equal to zero, and finally embedded into the DWT low frequency sub-band of green components, The coefficients whose energies are larger than the others are selected to hide watermark, and the hidden watermark strength is determined by the energy ratio between the selected coefficients energies and the mean energy of the subband. The experiment results demonstrate that the proposed watermarking scheme is very robust against the attacks such as additive noise, low-pass filtering, scaling, cropping image, row （or column ） deleting, and }PEG compression.
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| 关 键 词： | 数字水印 微波传输 彩色图像 多媒体 图像处理 |
| 文章编号： | 1005-2429（2005）02-0130-05 |
| 收稿时间： | 2004-12-21 |
DWT-Based Robust Color Image Watermarking Scheme |
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| Liu Lianshan,Li Renhou,Gao Qi.DWT-Based Robust Color Image Watermarking Scheme[J].Journal of Southwest Jiaotong University,2005,13(2):130-134. |
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| Authors: | Liu Lianshan Li Renhou Gao Qi |
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| Abstract: | A scheme of embedding an encrypted watermark into the green component of a color image is proposed. The embedding process is implemented in the discrete wavelet transformation (DWT) domain. The original binary watermark image is firstly encrypted through scrambling technique, and then spread with two orthogonal pseudo-random sequences whose mean values are equal to zero, and finally embedded into the DWT low frequency sub-band of green components. The coefficients whose energies are larger than the others are selected to hide watermark, and the hidden watermark strength is determined by the energy ratio between the selected coefficients energies and the mean energy of the subband. The experiment results demonstrate that the proposed watermarking scheme is very robust against the attacks such as additive noise, low-pass filtering, scaling, cropping image, row (or column ) deleting, and JPEG compression. |
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| Keywords: | Digital watermark Discrete wavelet transformation Color image Copyright protection |
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