Patent ID: 11875218
Assignee: DIGIMARC CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method employing image data corresponding to a physical object, said physical object having earlier been marked to convey a 2D machine-readable indicia of a first size, said earlier-marked indicia including a payload signal component and a reference signal component, the method comprising the acts:
determining spatial correspondence between the image data and the reference signal component of the 2D machine-readable indicia;
selecting a patch of the image data that is smaller than said first size, and correlating the patch of the image data with a spatially-corresponding patch of the reference signal component;
concluding, from a result of said correlating, that the patch of image data exhibits inversion; and
adjusting only a subset of the image data, less than an entirety of the image data, to compensate for said determined inversion.