Patent ID: 8632153

Claim:
A printing system comprising: a structure including a media transport system that transports a print media along a transport path; a first printhead that prints a first pattern on a first side of the print media, the first print head being attached to the structure; a second printhead that prints a second pattern on a second side of the print media, the second print head being attached to the structure; a print controller that controls the operation of the first printhead and the second printhead; an image registration system for registering the first pattern on the first side of the print media and the second pattern on the second side of the print media relative to each other, the image registration system comprising: a fiducial attached to the structure, the fiducial including a fiducial origin, a first fiducial side and a second fiducial side; a first camera that captures a first fiducial image of the first side of the fiducial and the fiducial origin, and a first pattern image of the first pattern on the first side of the print media; a second camera that captures a second fiducial image of the second side of the fiducial and the fiducial origin, and a second pattern image of the second pattern on the second side of the print media; and an image registration controller that processes the first fiducial image, the first pattern image, the second fiducial image, and the second pattern image to determine a relative position of the first pattern and the second pattern, wherein the print controller adjusts the registration of subsequently printed patterns on at least one of the first side of the print media and the second side of the print media based on the determined relative pattern position of the first pattern and the second pattern.