LAUSR

Today, images editing software has greatly evolved, thanks to them that the semantic manipulation of images has become easier. On the other hand, the identification of these modifications becomes a very difficult task because the modified regions are not visually apparent. In this article, a new convolutional neural network method based on an encoder/decoder called Fals-Unet is proposed to locate the manipulated regions. The encoder of our method uses an architecture topologically identical to that of the Resnet50 method; its main goal is the exploitation of spatial maps to analyze the discriminating characteristics between the manipulated and non-manipulated regions. The decoding network learns the mapping from low-resolution feature maps to pixel-wise predictions for localizing the falsified regions. Finally, the predicted binary mask (0: falsify, 1: not falsify) is generated by the final layer (softmax). Experimental results on many public datasets CASIA, NIST’16, COVERAGE, and COMOD show that the proposed CNN-based model outperforms some methods.