Image Authenticity Detection Using DWT and Circular Block-Based LTrP Features

Abstract

Copy-move forgery is the most common type of digital image manipulation, in which the content from the same image is used to forge it. Such manipulations are performed to hide the desired information. Therefore, forgery detection methods are required to identify forged areas. We have introduced a novel method for features computation by employing a circular block-based method through local tetra pattern (LTrP) features to detect the single and multiple copy-move attacks from the images. The proposed method is applied over the circular blocks to efficiently and effectively deal with the post-processing operations. It also uses discrete wavelet transform (DWT) for dimension reduction. The obtained approximate image is distributed into circular blocks on which the LTrP algorithm is employed to calculate the feature vector as the LTrP provides detailed information about the image content by utilizing the direction-based relation of central pixel to its neighborhoods. Finally, Jeffreys and Matusita distance is used for similarity measurement. For the evaluation of the results, three datasets are used, namely MICC-F220, MICC-F2000, and CoMoFoD. Both the qualitative and quantitative analysis shows that the proposed method exhibits state-of-the-art performance under the presence of post-processing operations and can accurately locate single and multiple copy-move forgery attacks on the images.

AI-CenterNet CXR: An artificial intelligence (AI) enabled system for localization and classification of chest X-ray disease

“…The easier availability of multimedia content such as digital images and videos has enhanced the growth of tasks performed in the field of computer vision (CV). The well-known applications of CV involve object detection ( 1 ), object tracking ( 2 ), medical image analysis ( 3 – 5 ), text analysis ( 6 , 7 ), and video processing ( 8 ). The usage of CV approaches in the area of medical image analysis is assisting the practitioners to perform their jobs quickly and accurately.…”