• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >DIGI-COP: A digital image watermarking system for copyright protection.
【24h】

DIGI-COP: A digital image watermarking system for copyright protection.

机译：DIGI-COP：一种用于版权保护的数字图像水印系统。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this thesis, we develop and test a new image-adaptive watermarking system, "DIGI-COP", in the discrete cosine transform (DCT) domain, for copyright protection of digital images. "DIGital Image COpyright Protector" or short DIGI-COP generates a new type of watermark and embeds it in the image such that it becomes virtually invisible to the human eye. DIGI-COP'S performance is compared to the classical Block-DCT algorithm by Koch et al. and several improvements in terms of fidelity (imperceptibility) and security have been achieved.; In addition to the watermark extraction process, a novel Error Correction technique is developed to increase overall system accuracy and reliability against corruptly decoded bits. Extensive experimentations with over 100,000 encode/decode operations on thousand selected color images show DIGI-COP's high resilience to image processing tasks such as: JPEG image compression, several Gaussian noise levels, different image blurring kernels, two levels of image sharpening, six image scaling operations, color inversion and image cropping.
机译：在本文中，我们在离散余弦变换（DCT）域中开发并测试了一种新的图像自适应水印系统“ DIGI-COP”，用于数字图像的版权保护。 “ DIGital Image COpyright保护器”或简称DIGI-COP会生成一种新型的水印，并将其嵌入图像中，从而使人眼几乎看不见。将DIGI-COP的性能与Koch等人的经典Block-DCT算法进行了比较。并在保真度（感知力）和安全性方面取得了一些改进。除了水印提取过程之外，还开发了一种新颖的纠错技术，以提高整体系统的准确性和可靠性，以防止损坏的解码位。在数千幅选定的彩色图像上进行的超过100,000种编码/解码操作的广泛实验表明，DIGI-COP对图像处理任务具有很高的弹性，例如：JPEG图像压缩，几种高斯噪声级，不同的图像模糊核，两种图像锐化级别，六种图像缩放操作，颜色反转和图像裁剪。

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