title: Effective detection for linear up-sampling by factor of fraction.
abstract: In this study, we propose an effective method for detecting linear up-sampling in images. Our method includes three parts. First, we present an algorithm Resampling Matrix Construction (RMC) that automatically derives the resampling matrix for any given resampling factor of fraction. Second, we show an algorithm Zeroing Mask Derivation (ZMD) that constructs a zeroing mask for the resampling by produced by the proposed algorithm. Lastly, we propose an algorithm Up-sampling Detection (UD) that detects the up-sampling in images using the zeroing masks in a specific order. Compared with existing methods, the proposed method for up-sampling detection can not only effectively detect resampling by any fraction but can also recover the up-sampling fraction. Preliminary experimental results show that the proposed method is indeed effective.
authors.forename: Yang Ta
authors.initials: YT
authors.lastname: Kao
authors.forename: Hwei Jen
authors.initials: HJ
authors.lastname: Lin
authors.forename: Chun Wei
authors.initials: CW
authors.lastname: Wang
authors.forename: Yi Chun
authors.initials: YC
authors.lastname: Pai
mesh_terms: D000465:Algorithms; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D016014:Linear Models; D015203:Reproducibility of Results; D018401:Sample Size; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted; D013382:Subtraction Technique