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arXiv 2302.02276cs.MMcs.CRcs.CV
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基于隐写特征增强与图注意力学习的JPEG隐写分析

JPEG Steganalysis Based on Steganographic Feature Enhancement and Graph Attention Learning

Qiyun Liu, Zhiguang Yang, Hanzhou Wu

AI总结:

针对现有JPEG隐写分析算法未结合领域特性、弱隐写信号易丢失的问题,提出融合图注意力学习与特征增强模块的新型表示学习算法,结合ALASKA2预训练,检测准确率优于现有方法。

摘要:

图像隐写分析的目的是判断载体图像中是否含有隐藏信息。由于JPEG是社交网络中最常用的图像格式,针对JPEG图像的隐写分析也是当前最亟待探索的方向。然而,现有大多数用于检测JPEG图像中是否藏有秘密信息的算法,都是结合当下流行的计算机视觉相关网络设计的,并未考虑图像隐写分析中存在的关键特性。隐写信号作为一种极其微弱的信号,在其表示学习过程中能够被增强是至关重要的。受这一认知启发,本文提出了一种用于JPEG隐写分析的新型表示学习算法,该算法主要由图注意力学习模块和特征增强模块组成。图注意力学习模块的设计目的是避免卷积神经网络的局部特征学习以及依赖深度堆叠扩大感知域所导致的全局特征丢失。特征增强模块则用于防止卷积层堆叠削弱隐写信息。此外,我们还采用了预训练的方式,即利用大规模数据集初始化网络权重,以提升网络提取判别性特征的能力。我们提出,对于用BOSSBase+BOWS2训练的模型,应采用ALASKA2进行预训练。实验结果表明,所提算法在检测准确率上优于现有技术,验证了该工作的优越性与适用性。

英文摘要:

The purpose of image steganalysis is to determine whether the carrier image contains hidden information or not. Since JEPG is the most commonly used image format over social networks, steganalysis in JPEG images is also the most urgently needed to be explored. However, in order to detect whether secret information is hidden within JEPG images, the majority of existing algorithms are designed in conjunction with the popular computer vision related networks, without considering the key characteristics appeared in image steganalysis. It is crucial that the steganographic signal, as an extremely weak signal, can be enhanced during its representation learning process. Motivated by this insight, in this paper, we introduce a novel representation learning algorithm for JPEG steganalysis that is mainly consisting of a graph attention learning module and a feature enhancement module. The graph attention learning module is designed to avoid global feature loss caused by the local feature learning of convolutional neural network and reliance on depth stacking to extend the perceptual domain. The feature enhancement module is applied to prevent the stacking of convolutional layers from weakening the steganographic information. In addition, pretraining as a way to initialize the network weights with a large-scale dataset is utilized to enhance the ability of the network to extract discriminative features. We advocate pretraining with ALASKA2 for the model trained with BOSSBase+BOWS2. The experimental results indicate that the proposed algorithm outperforms previous arts in terms of detection accuracy, which has verified the superiority and applicability of the proposed work.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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