网络安全技术与应用
網絡安全技術與應用
망락안전기술여응용
NETWORK SECURITY TECHNOLOGIES & APPLICATION
2012年
12期
61-63
,共3页
Arnold变换%零水印%离散小波变换%奇异值分解
Arnold變換%零水印%離散小波變換%奇異值分解
Arnold변환%령수인%리산소파변환%기이치분해
non-watermarking%discrete wavelet transform%singular value decomposition%Arnold transform0
为了提高水印的鲁棒性和减小对应版权信息的大小,本文提出了一种基于Arnold变换、DWT和SVD的零水印算法。该算法将载体图像进行DWT变换,对低频子带进行分块SVD;比较置乱后的最大奇异值的大小,若大于则对应位为1,否则为0;将结果与预处理过的水印做异或运算,得密钥矩阵。该矩阵为检测水印提供密钥。实验证明,本算法对图像压缩、滤波、模糊、噪声及脏图具有良好的鲁棒性。
為瞭提高水印的魯棒性和減小對應版權信息的大小,本文提齣瞭一種基于Arnold變換、DWT和SVD的零水印算法。該算法將載體圖像進行DWT變換,對低頻子帶進行分塊SVD;比較置亂後的最大奇異值的大小,若大于則對應位為1,否則為0;將結果與預處理過的水印做異或運算,得密鑰矩陣。該矩陣為檢測水印提供密鑰。實驗證明,本算法對圖像壓縮、濾波、模糊、譟聲及髒圖具有良好的魯棒性。
위료제고수인적로봉성화감소대응판권신식적대소,본문제출료일충기우Arnold변환、DWT화SVD적령수인산법。해산법장재체도상진행DWT변환,대저빈자대진행분괴SVD;비교치란후적최대기이치적대소,약대우칙대응위위1,부칙위0;장결과여예처리과적수인주이혹운산,득밀약구진。해구진위검측수인제공밀약。실험증명,본산법대도상압축、려파、모호、조성급장도구유량호적로봉성。
In order to improve the robustness of the watermarking and reduce the size of the copyright information,this paper presents an improved non-watermarking algorithm based on DWT and SVD.When embedding,performs DWT on the host image to decompose it into four non-overlapping sub-bands,then selects the LL sub-bands to perform block SVD.Then the largest singular value of each block is selected to form a matrix.The values of adjacent element of scrambling matrix are compared,when the compared value is true,the corresponding value is 1,or is 0.The key matrix is formed when doing XOR operation on the result and the scrambled and extended watermarking image.The key matrix can be used to detect the watermarking image later.The experimental results show that this algorithm has good performance to the Compression、filtering,noise,fuzzy and dirty pictures.