Patent ID: 11909933
Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 6:
7. The method of claim 1, wherein generating the set of training page images comprises:
collecting a set of copy-guard digital stamp patterns;
collecting a set of other digital stamp patterns;
collecting a set of background pages;
transforming each digital stamp pattern in the set of copy-guard digital stamp patterns and the set of other digital stamp patterns using a random affine transformation, wherein the random affine transformation includes at least one of:
translation;
scaling;
homothety;
similarity;
reflection;
rotation; and
shear mapping;

overlaying each transformed digital stamp pattern onto a randomly selected background page from the set of background pages to create an overlay page image; and
generating the set of training page images using the overlay page images.