公开(公告)号：US20250117908A1

公开(公告)日：2025-04-10

申请号：US18481463

申请日：2023-10-05

Applicant: Booz Allen Hamilton Inc.

Inventor： Robert Shaw Sneddon

IPC: G06T7/00 ,  G06F16/583 ,  G06T11/00

Abstract: Embodiments relate to a digital image file alteration detection controller which implements a processor configuration to efficiently detect an alteration to a digital image file. The digital image file alteration detection controller can include a processor, and a memory associated with the processor, the memory including instructions stored thereon that when executed by the processor will cause the processor to: extract Photo Response Non-Uniformity (PRNU) data of a digital image file received from the memory; determine a local variability representing a variability in PRNU data for a locale of a digital image file; determine a global variability representing a variability in PRNU data for an entire digital image file; compare local variability to global variability; and generate an alteration detection indicator indicative of an alteration detected when the local variability to global variability comparison is less than a threshold value.