ITR: Theory and Design of Watermarking Codes

ITR：水印代码的理论和设计

• 批准号: 0081268
• 负责人: Pierre Moulin
• 金额: $ 49.96万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0081268&HistoricalAwards=false
• 关键词: ITR; Theory; Design; Watermarking; Codes

With the widespread dissemination of digital video, images, audio and other data on the Internet and other media, information protection and copyright protection have become areas of vital importance. These applications have generated an extraordinary level of interest in digital watermarking techniques in recent years. Whereas novel watermarking algorithms and novel ways to defeat them have been developed, fundamental principles of information theory have barely skimmed the surface of this field, and recent results by the PI have shown that existing schemes operate far below the ultimate achievable limits. We intend to develop our ideas for a theory of watermarking codes and to construct codes that approach capacity. We also plan to develop a closely related thrust of research on robust watermarking and authentication techniques for images and video. Our research will be guided by extensive body of knowledge (much of it developed in the last decade) developed in the context of modern communication systems on one hand, and image analysis on the other hand. Our plan is to explore the following topics:Codes for Gaussian channels. We have recently derived closed-form solutions for the hiding capacity of channels involving Gaussian sources and squared error distortion metrics. Our first goal in this research is to develop codes whose performance approaches capacity for such channels. This model, in addition to being useful in the context of practical watermarking applications, will shed light on the fundamental issues involved in constructing watermarking codes. Hence its implications go beyond the particular model studied.Estimation of Attack Channel Parameters. In blind watermarking applications, the decoder does not have access to the original data, and does not know the particular attack that may have been used to corrupt the data. Desynchronization attacks such as scaling, shifting, rotating or warping of image data can then be deadly. We will explore fundamental mechanisms for the decoder to estimate the parameters of such attacks.Codes for arbitrary channels. While Gaussian channels are the worst channels under certain conditions, watermarking codes need to be robust against a variety of attacks. One of our goals is to develop codes and decoding techniques that perform well not only against Gaussian noise attacks, but also against desynchronization attacks, erasures, and other attacks.Application to Image and Video Watermarking. While information theory and coding theory provide fundamental guiding principles to the design of watermarking systems, application of these principles presents unique challenges in specific situations such as image and video watermarking. These two applications will be investigated in detail.Fingerprinting and Authentication Codes. There are several information-hiding problems closely related to watermarking that we intend to explore. Many graduate students are interested in moving into such an attractive research area, which combines breadth and strong emphasis on fundamentals with practical relevance. We intend to train these students for leadership roles in information technology. We also plan to involve undergraduate students, as they find this subject to be a truly enjoyable learning experience.

随着数字视频、图像、音频和其他数据在互联网和其他媒体上的广泛传播，信息保护和版权保护已成为至关重要的领域。 近年来，这些应用已经产生了对数字水印技术的极大兴趣。 虽然新的水印算法和新的方法来击败他们已经开发出来，信息论的基本原则几乎没有掠过这个领域的表面，最近的结果由PI已经表明，现有的计划远远低于最终可实现的限制。 我们打算发展我们的想法的理论水印码，并构建代码的方法的能力。 我们还计划开发一个密切相关的研究方向，即图像和视频的鲁棒水印和认证技术。 我们的研究将以广泛的知识体系（其中大部分是在过去十年中开发的）为指导，一方面是在现代通信系统的背景下开发的，另一方面是图像分析。 我们的计划是探索以下主题：高斯信道的编码。 我们最近推导出封闭形式的解决方案，隐藏容量的渠道，涉及高斯源和平方误差失真度量。 我们在这项研究中的第一个目标是开发代码的性能接近这样的信道容量。 这个模型，除了在实际的水印应用的背景下是有用的，将揭示在构建水印代码所涉及的基本问题。 因此，它的影响超出了特定的模型研究。攻击信道参数估计。 在盲水印应用中，解码器不能访问原始数据，并且不知道可能已经被用来破坏数据的特定攻击。 然后，对图像数据进行缩放、移位、旋转或扭曲等去压缩攻击可能是致命的。 我们将探索解码器估计此类攻击参数的基本机制。任意信道的代码。 高斯信道在一定条件下是最坏的信道，水印编码需要对各种攻击具有鲁棒性。 我们的目标之一是开发代码和解码技术，不仅可以抵抗高斯噪声攻击，而且可以抵抗去随机化攻击，擦除和其他攻击。 虽然信息理论和编码理论为水印系统的设计提供了基本指导原则，但这些原则的应用在图像和视频水印等特定情况下提出了独特的挑战。 这两个应用程序将被详细研究。指纹和认证码。 有几个信息隐藏问题密切相关的水印，我们打算探讨。许多研究生都有兴趣进入这样一个有吸引力的研究领域，它结合了广度和对实际相关性的基础知识的高度重视。 我们打算培养这些学生在信息技术的领导作用。 我们还计划让本科生参与进来，因为他们发现这个主题是一个真正愉快的学习经历。