Patent Document ID: 8931865
Application ID: 14064389
Patent Status: 1

Claim One:
1. A printing system including a plurality of imaging systems for capturing images of a receiver medium, comprising: a transport system for transporting a receiver medium through the printing system along a transport path, the receiver medium having a first side and an opposing second side; one or more printing modules for forming a printed image on the receiver medium; an illumination system for illuminating the first side of the receiver medium with light providing an illumination pattern, wherein a portion of the light in the illumination pattern is reflected from the first side of the receiver medium thereby providing a reflected illumination pattern and a portion of the light in the illumination pattern is transmitted through the receiver medium to the second side of the receiver medium thereby providing a transmitted illumination pattern; a first imaging system positioned to capture an image of at least a portion of the first side of the receiver medium, the first imaging system having a field-of-view that includes at least some of the reflected illumination pattern; a second imaging system positioned to capture an image of at least a portion of the second side of the receiver medium, the second imaging system having a field-of-view that includes at least some of the transmitted illumination pattern; a data processing system; and a program memory communicatively connected to the data processing system and storing instructions configured to cause the data processing system to implement a method for aligning the first and second imaging systems, wherein the method includes: using the first imaging system to capture a first image of the first side of the receiver medium, the first image including at least a portion of the reflected illumination pattern; using the second imaging system to capture a second image of the second side of the receiver medium, the second image including at least a portion of the transmitted illumination pattern; analyzing the captured first and second images to determine a relative position of the reflected illumination pattern in the first image and the transmitted illumination pattern in the second image; determining one or more imaging system alignment parameters responsive to the determined relative position; and storing the determined imaging system alignment parameters in a processor-accessible memory for subsequent use in aligning images captured with the first imaging system with images captured with the second imaging system.