Patent ID: 8451472

Claim:
A print verification unit comprising: an interface to receive one or more digitized source images; a computer memory to store the digitized source images; one or more image scanners to scan printed data from a medium to generate one or more corresponding scanned images; and a processor to perform: an alignment process to generate a replacement image from the scanned image by tagging each line of the scanned image with one or more tag pairs associated with one or more synchronization strips embedded in the digitized source image to generate additional lines in the scanned images to correspond to the digitized source images, and align the replacement image with the digitized source image on a page and page, line by line, and pel by pel basis; and a comparison process that compares one or more source pels of the digitized source image with one or more corresponding scanned pels of the replacement image to determine differences, the differences being defects in the printed copies.