Abstract
The research on image steganalysis has taken a great step forward thanks to the development of convolutional neural network (CNN). However, most existing CNN steganalyzers require deep network architecture and a long training time to obtain good performance. Besides, most methods input a cover image and the corresponding stego image as a pair during the training stage. In this case, not only the label, but also the texture difference between the cover and the stego can be used. In this paper, we propose a novel method for spatial domain steganalysis to boost the detection performance through a secondary task. First, a concise and efficient CNN is used to distinguish stego images from cover images. Second, an up-sampling module via transposed convolution and feature fusion is used to predict the number of modified pixels in different blocks of the image, which is called block regression. The loss functions of these two parts above are optimized simultaneously. Experimental results show that the proposed method can obtain a better performance in detection error rate compared to previous works and a good trade-off between training time and detection accuracy.
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Chen, Z., Yu, X., Chen, R. (2022). Image Block Regression Based on Feature Fusion for CNN-Based Spatial Steganalysis. In: Zhao, X., Piva, A., Comesaña-Alfaro, P. (eds) Digital Forensics and Watermarking. IWDW 2021. Lecture Notes in Computer Science(), vol 13180. Springer, Cham. https://doi.org/10.1007/978-3-030-95398-0_18
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