Shangjun Luo1, Junwei Luo1, Wei Lu1,*, Yanmei Fang1, Jinhua Zeng2, Shaopei Shi2, Yue Zhang3,4
CMC-Computers, Materials & Continua, Vol.66, No.1, pp. 647-657, 2021, DOI:10.32604/cmc.2020.012869
Abstract The estimation of image resampling factors is an important problem in
image forensics. Among all the resampling factor estimation methods, spectrumbased methods are one of the most widely used methods and have attracted a lot
of research interest. However, because of inherent ambiguity, spectrum-based
methods fail to discriminate upscale and downscale operations without any prior
information. In general, the application of resampling leaves detectable traces in
both spatial domain and frequency domain of a resampled image. Firstly, the
resampling process will introduce correlations between neighboring pixels. In this
case, a set of periodic pixels that are correlated to their neighbors… More >
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