摘要
利用混沌映射生成从小到大顺序排列的混沌序列得到加密水印图像,对第一内蕴模态函数图像进行8×8分块的DWT变换,将加密水印嵌入到变换的矩阵中,再对产生的新矩阵进行2维经验模态分解逆变换得到加密的织锦图案.实验结果表明,该算法能够提高水印加密图像的安全性和加密效果.
The encrypted watermark image, which generated from ascending chaos sequence based on chaos maps, transforms first Intrinsic Mode Function image by discrete wavelet with 8×8 blocks. Then the encrypted watermark image is embedded in the transformed matrix. Finally, the encrypted brocade pattern is obtained by taking Bidi- mensional Empirical Mode Decomposition Inverse Transform to the matrix. The experimental results show that the algorithm improves the safety and encrypted effect for encrypted watermark image.
出处
《江西师范大学学报(自然科学版)》
CAS
北大核心
2011年第6期624-628,共5页
Journal of Jiangxi Normal University(Natural Science Edition)
基金
国家社会科学基金(09XMZ045)
湖北省自然科学基金(2010CDZ047
2011CDB088)
湖北省教育厅课题(B20101909)资助项目
关键词
2维经验模态分解
混沌序列
土家织锦
非物质文化遗产保护
bidimensional empirical mode decomposition
chaos sequence
tujia brocade
nonmaterial cultural heritage protection