公开(公告)号：US12014441B2

公开(公告)日：2024-06-18

申请号：US17479910

申请日：2021-09-20

Applicant: Digimarc Corporation

Inventor： Ravi K. Sharma ,  John D. Lord ,  Robert G. Lyons ,  Osama M. Alattar ,  Jacob L Boles

IPC: G06T1/00 ,  G06T3/00 ,  G06T3/02 ,  G06T3/10

CPC classification number: G06T1/0064 ,  G06T3/02 ,  G06T3/10 ,  G06T2201/0052 ,  G06T2201/0065 ,  G06T2201/0081

Abstract: Signal processing devices and methods estimate a geometric transform of an image. One method measures correlation between a transformed reference signal component and an image, updates, based on the measured correlation that is below a threshold, coordinates of the reference signal component to a location within a neighborhood around the coordinates of the transformed reference signal component; determines a new geometric transform that transforms the reference signal components to updated coordinates; and applies the new geometric transform to extract encoded digital data from the image.