• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Imaging >Computationally Efficient Robust Color Image Watermarking Using Fast Walsh Hadamard Transform
【24h】

Computationally Efficient Robust Color Image Watermarking Using Fast Walsh Hadamard Transform

机译：使用快速Walsh Hadamard变换的高效计算鲁棒彩色图像水印

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Watermark is the copy deterrence mechanism used in the multimedia signal that is to be protected from hacking and piracy such a way that it can later be extracted from the watermarked signal by the decoder. Watermarking can be used in various applications such as authentication, video indexing, copyright protection and access control. In this paper a new CDMA (Code Division Multiple Access) based robust watermarking algorithm using customized 8 ???? 8 Walsh Hadamard Transform, is proposed for the color images and detailed performance and robustness analysis have been performed. The paper studies in detail the effect of spreading code length, number of spreading codes and type of spreading codes on the performance of the watermarking system. Compared to the existing techniques the proposed scheme is computationally more efficient and consumes much less time for execution. Furthermore, the proposed scheme is robust and survives most of the common signal processing and geometric attacks.
机译：水印是在多媒体信号中使用的复制威慑机制，该机制应受到保护，以防止黑客入侵和盗版，以便以后可以由解码器从加水印的信号中提取出水印。水印可以用于各种应用程序中，例如身份验证，视频索引，版权保护和访问控制。在本文中，一种新的基于CDMA（码分多址）的鲁棒水印算法使用定制的8位码元。针对彩色图像提出了8 Walsh Hadamard变换，并进行了详细的性能和鲁棒性分析。本文详细研究了扩展码长度，扩展码数量和扩展码类型对水印系统性能的影响。与现有技术相比，所提出的方案在计算上更有效，并且消耗更少的执行时间。此外，所提出的方案是鲁棒的，并且在大多数常见信号处理和几何攻击中幸免。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号