TY - CONF T1 - Exploiting PRNU and Linear Patterns in Forensic Camera Attribution under Complex Lens Distortion Correction T2 - ICASSP 2023 - 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) Y1 - 2023 A1 - Montibeller, Andrea A1 - Fernando Pérez-González KW - Acoustic distortion KW - Camera Attribution KW - Camera Source Identification KW - cameras KW - forensics KW - GPU KW - Graphics processing units KW - interpolation KW - PRNU KW - Radial Distortion Correction KW - Reliability KW - Software JF - ICASSP 2023 - 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) UR - https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10096605 ER - TY - CONF T1 - Design of projection matrices for PRNU compression T2 - 2017 IEEE Workshop on Information Forensics and Security (WIFS) Y1 - 2017 A1 - L. Bondi A1 - Fernando Pérez-González A1 - P. Bestagini A1 - S. Tubaro KW - acquisition time KW - cameras KW - computational complexity KW - data compression KW - defacto standard KW - design methodology KW - digital photo KW - forensics investigators KW - image coding KW - Image forensics KW - image sensors KW - image source identification KW - interpolation KW - matrix algebra KW - nearly-flat spectral characteristics KW - Performance evaluation KW - photo response nonuniformity KW - PRNU compression KW - probability KW - projection matrices KW - public image dataset KW - Signal to noise ratio KW - silicon sensor imperfections KW - specific camera sensor KW - weak multiplicative noise JF - 2017 IEEE Workshop on Information Forensics and Security (WIFS) ER - TY - CONF T1 - On the Role of Differentiation for Resampling Detection T2 - IEEE International Conference on Image Processing (ICIP) Y1 - 2010 A1 - Nahuel Dalgaard A1 - C. Mosquera A1 - Fernando Pérez-González KW - cyclostationarity KW - Image forensics KW - interpolation KW - prefiltering KW - resampling detection KW - watermarking JF - IEEE International Conference on Image Processing (ICIP) PB - IEEE CY - Hong Kong, China ER - TY - CONF T1 - Two-dimensional Statistical Test for the Presence of Almost Cyclostationarity on Images T2 - IEEE International Conference on Image Processing (ICIP) Y1 - 2010 A1 - David Vázquez-Padín A1 - C. Mosquera A1 - Fernando Pérez-González KW - cyclostationarity KW - Image forensics KW - interpolation KW - resampling factor estimation KW - spatial transformation KW - watermarking AB -

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.

JF - IEEE International Conference on Image Processing (ICIP) PB - IEEE CY - Hong Kong, China ER - TY - CONF T1 - An approach to the robust SPR problem through interpolation and avoidance: connections with the robust stability problem T2 - American Control Conference Y1 - 1998 A1 - C. Mosquera A1 - Fernando Pérez-González KW - avoidance KW - interpolation KW - robust KW - SPR JF - American Control Conference ER - TY - JOUR T1 - An Algorithm for Interpolation with Positive Rational Functions on the Imaginary Axis JF - Automatica Y1 - 1997 A1 - C. Mosquera A1 - Fernando Pérez-González KW - interpolation KW - SPR VL - 33 ER -