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Shi, Zenan; Chang, Chaoqun; Chen, Haipeng; Du, Xiaoyu; Zhang, Hanwang
International journal of intelligent systems, 20/May , Volume: 37, Issue: 5Journal Article
Current deep learning‐based image manipulation localization methods achieve impressive performance when rich spatial features and information are fully utilized. However, most of them suffer from the irrelevance of semantic awareness when identifying various manipulation categories. This leads to false alarms on recognizing forged regions. In this paper, we propose a Progressively‐Refined Neural Network (PR‐Net), to localize the tampered regions progressively under a coarse‐to‐fine workflow. Specifically, PR‐Net is composed of a Feature Extractor (FE) that captures feature intrinsic correlations and a Mask Generation Module (MGM) with three refining generators. The FE takes a CNN to extract the image features and introduces an attention mechanism Convolution Block Attention Module (CBAM) to suppress the image content and guide the extractor in exploring the inconsistencies between the manipulated and authentic regions. The MGM comprises three generators where the Coarse Mask RR‐Generator generates a localization result roughly, the Candidate Mask RR‐Generator generates a possible tampered region according to the rough localization measure, and the Fine Mask RR‐Generator produces the final prediction of manipulated regions. We also utilize the Rotated Residual (RR) structure to suppress the image content during the generative process. The extensive experimental results on four benchmark data sets (NIST16, COVER, CASIA v1.0, and In‐The‐Wild) demonstrate the superior performance of PR‐Net compared with the state‐of‐the‐art methods in localizing the manipulated regions.
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