Forensic detection of Median filtering in Images using Local Tetra Patterns and J-Divergence

Udayeni Anumala, M. Okade
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引用次数: 1

Abstract

This paper presents a novel application of local tetra patterns to the median filtering detection problem. The premise of the proposed method is based on the ability of the local tetra patterns in identifying the streaking fingerprints left over by the application of a median filter on an image. These streaking fingerprints serve as a clue in determining the authenticity of an image towards the application of a median filter. The streaking pixels are identified by establishing the relationship of every pixel with respect to its neighboring pixels. The relationship is in the form of horizontal and vertical derivative directions and magnitudes followed by the tetra pattern and magnitude assignment. The feature vector generated utilizing the local tetra patterns is reduced by using the J-divergence in-order to keep the computational complexity low. Experimental testing for the proposed method along with comparative analysis carried out with existing state-of-the-art methods shows good performance at reduced computational complexity for the proposed method.
基于局部Tetra模式和j -散度的图像中值滤波法医检测
本文提出了一种局部四元模式在中值滤波检测中的新应用。该方法的前提是基于局部四元模式识别图像中值滤波后留下的条纹指纹的能力。这些条纹指纹作为一个线索,在确定对中值滤波器的应用图像的真实性。通过建立每个像素相对于其相邻像素的关系来识别条纹像素。这种关系以水平和垂直导数方向和震级的形式存在,然后是四元模式和震级分配。为了保持较低的计算复杂度,利用局部四元模式生成的特征向量通过使用j散度来减少。对该方法进行了实验测试,并与现有最先进的方法进行了比较分析,结果表明该方法在降低计算复杂度方面具有良好的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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