计算机工程与应用2012，Vol.48Issue(16)：90-93,106,5.DOI:10.3778/j.issn.1002-8331.2012.16.020
一种基于非负矩阵分解的鲁棒零水印算法
Robust image zero-watermarking using non-negative matrix factorization
刘竞杰 1陶亮2
作者信息
- 1. 安徽工贸职业技术学院计算机技术系,安徽淮南232007
- 2. 安徽大学计算机科学与技术学院,合肥230601
- 折叠
摘要
Abstract
In order to solve the problem of perceptible quality degradation and the inherent conflict between imper-ceptibility and robustness, a novel image watermark algorithm based on Non-negative Matrix Factorization (NMF) and Discrete Wavelet Transform (DWT) is proposed in this paper. The processes of watermark embedding include three steps: the original image is divided to not-overlap image blocks and then decomposable coefficients are obtained by three-level DWT in every image blocks. Secondly the low-frequency coefficients of block images are selected and then approximately represented as a product of a base matrix and a coefficient matrix using NMF. Finally the feature vector represent original image is obtained by quantizing coefficient matrix, and then the copyright information is embedding by calculating the watermark and feature vector. Experimental results show that the scheme is robust against common signal processing attacks, meanwhile security of the algorithm is guaranteed by using secret keys.关键词
数字水印/零水印/离散小波变换/非负矩阵分解/鲁棒性Key words
digital watermarking/ zero-watermarking/ discrete wavelet transform/ non-negative matrix factorization/ robust分类
信息技术与安全科学引用本文复制引用
刘竞杰,陶亮..一种基于非负矩阵分解的鲁棒零水印算法[J].计算机工程与应用,2012,48(16):90-93,106,5.
