Finding Incompatibles Blocks for Reliable JPEG Steganalysis

arXiv:2402.13660v1 Announce Type: new
Abstract: This article presents a refined notion of incompatible JPEG images for a quality factor of 100. It can be used to detect the presence of steganographic schemes embedding in DCT coefficients. We show that, within the JPEG pipeline, the combination of the DCT transform with the quantization function can map several distinct blocks in the pixel domain to the same block in the DCT domain. However, not every DCT block can be obtained: we call …

article arxiv can cs.cr detect factor function images jpeg notion pipeline presence quality transform