首页> 外文期刊>Image Processing, IET >Minimisation of image watermarking side effects through subjective optimisation
【24h】

Minimisation of image watermarking side effects through subjective optimisation

机译:通过主观优化将图像水印副作用最小化

获取原文
获取原文并翻译 | 示例
           

摘要

This study investigates the use of structural similarity index (SSIM) on the minimised side effect to image watermarking. For the fast implementation and more compatibility with the standard discrete cosine transform (DCT)-based codecs, watermark insertion is carried out on the DCT coefficients and hence an SSIM model for DCT-based watermarking is developed. For faster implementation, the SSIM index is maximised over independent 4 × 4 non-overlapped blocks, but the disparity between the adjacent blocks reduces the overall image quality. This problem is resolved through optimisation of overlapped blocks, but, the higher image quality is achieved at a cost of high computational complexity. To reduce the computational complexity while preserving the good quality, optimisation of semi-overlapped blocks is introduced. The authors show that while SSIM-based optimisation over overlapped blocks has as high as 64 times the complexity of the 4 × 4 non-overlapped method, with semi-overlapped optimisation the high quality of overlapped method is preserved only at a cost of less than 8 times the non-overlapped method.
机译:这项研究调查了结构相似性指数(SSIM)对图像水印的最小化副作用的使用。为了快速实现并与基于标准离散余弦变换(DCT)的编解码器更好地兼容,对DCT系数执行水印插入,因此开发了用于基于DCT的水印的SSIM模型。为了更快地实施,SSIM索引在独立的4×4个非重叠块上最大化,但是相邻块之间的差异降低了整体图像质量。通过重叠块的优化解决了该问题,但是以较高的计算复杂度为代价获得了更高的图像质量。为了降低计算复杂度并同时保持良好的质量,引入了半重叠块的优化。作者表明,尽管对重叠块进行基于SSIM的优化的复杂度是4×4非重叠方法的64倍,但使用半重叠优化时,重叠方法的高质量得以保留,而成本却低于非重叠方法的8倍。

著录项

  • 来源
    《Image Processing, IET》 |2013年第8期|733-741|共9页
  • 作者

    Golestani H.B.; Ghanbari M.;

  • 作者单位

    Dept. of Electr. & Comput. Eng., Sharif Univ. of Technol., Tehran, Iran|c|;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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