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首页> 外文会议>International Conference on Computer Vision Theory and Applications >Securing Iris Images with a Robust Watermarking Algorithm based on Discrete Cosine Transform
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Securing Iris Images with a Robust Watermarking Algorithm based on Discrete Cosine Transform

机译：使用基于离散余弦变换的鲁棒水印算法确保虹膜图像

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摘要

With the expanded use of biometric systems, the security of biometric trait is becoming increasingly important. When biometric images are transmitted through insecure channels or stored as a raw data, they become subject to the risk of being stolen, faked and attacked. Hence, it is imperative that robust and reliable means of protection are implemented. Various methods of data protection are available and digital watermarking is one such techniques. This paper presents a new method for protecting the integrity of the iris images using a demographic text as a watermark. The watermark text is embedded in the middle band frequency region of the iris image by interchanging three middle band coefficients pairs of the Discrete Cosine Transform (DCT). Experimental results show that exchanging more than one pair will make middle band scheme more robust against malicious attack along with making it resistant to image manipulation such as compression. The results also illustrate that our watermarking algorithm does not introduce discernible decrease on iris image quality or biometric recognition performance.
机译：随着生物识别系统的扩展使用，生物识别性状的安全性变得越来越重要。当通过不安全的频道传输生物识别图像或作为原始数据存储时，它们会受到被盗，伪造和攻击的风险。因此，必须实施强大和可靠的保护手段。可以使用各种数据保护方法，并且数字水印是一种这样的技术。本文介绍了使用人口文本作为水印保护虹膜图像完整性的新方法。水印文本通过互换三个离散余弦变换（DCT）的三个中频系数对嵌入IRIS图像的中间带频率区域中。实验结果表明，交换多一对将使中间频段方案对恶意攻击更加强大，以及使其抵抗诸如压缩的图像操纵。结果还说明我们的水印算法在虹膜图像质量或生物识别性能上没有引入可辨别的降低。

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