TítuloTwo-dimensional Statistical Test for the Presence of Almost Cyclostationarity on Images
Tipo de publicaciónConference Paper
Year of Publication2010
AutoresVázquez-Padín, D, Mosquera, C, Pérez-González, F
Conference NameIEEE International Conference on Image Processing (ICIP)
Date Published09/2010
Conference LocationHong Kong, China
Palabras clavecyclostationarity, Image forensics, interpolation, resampling factor estimation, spatial transformation, watermarking

In this work, we study the presence of almost cyclostationary fields in images for the detection and estimation of digital forgeries. The almost periodically correlated fields in the two-dimensional space are introduced by the necessary interpolation operation associated with the applied spatial transformation. In this theoretical context, we extend a statistical time-domain test for presence of cyclostationarity to the two-dimensional space. The proposed method allows us to estimate the scaling factor and the rotation angle of resized and rotated images, respectively. Examples of the output of our method are shown and comparative results are presented to evaluate the performance of the two-dimensional extension.