Copy-Move Geometric Tampering Estimation Through Enhanced SIFT Detector Method  

作　　者：J.S.Sujin S.Sophia 

机构地区：[1]Department of Electronics and Communication Engineering,Sri Krishna College of Technology,Coimbatore,641042,India [2]Department of Electronics and Communication Engineering,Sri Krishna College of Engineering and Technology,Coimbatore,641008,India

出　　处：《Computer Systems Science & Engineering》2023年第1期157-171,共15页计算机系统科学与工程（英文）

摘　　要：Digital picture forgery detection has recently become a popular and sig-nificant topic in image processing.Due to advancements in image processing and the availability of sophisticated software,picture fabrication may hide evidence and hinder the detection of such criminal cases.The practice of modifying origi-nal photographic images to generate a forged image is known as digital image forging.A section of an image is copied and pasted into another part of the same image to hide an item or duplicate particular image elements in copy-move forgery.In order to make the forgeries real and inconspicuous,geometric or post-processing techniques are frequently performed on tampered regions during the tampering process.In Copy-Move forgery detection,the high similarity between the tampered regions and the source regions has become crucial evidence.The most frequent way for detecting copy-move forgeries is to partition the images into overlapping square blocks and utilize Discrete cosine transform(DCT)com-ponents as block representations.Due to the high dimensionality of the feature space,Gaussian Radial basis function(RBF)kernel based Principal component analysis(PCA)is used to minimize the dimensionality of the feature vector repre-sentation,which improves feature matching efficiency.In this paper,we propose to use a novel enhanced Scale-invariant feature transform(SIFT)detector method called as RootSIFT,combined with the similarity measures to mark the tampered areas in the image.The proposed method outperforms existing state-of-the-art methods in terms of matching time complexity,detection reliability,and forgery location accuracy,according to the experimental results.The F1 score of the proposed method is 92.3%while the literature methods are around 90%on an average.

关 键 词：Multi sensor data fusion DISCRIMINATOR orientation POSE position mean average precision RECALL 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]