Patent ID: 8462380

Claim:
A system for accurately measuring image geometries within a printing system by measuring one or more two-dimensional arrays of indicia marks provided on both faces of a sheet of print media, the system comprising: a two-dimensional array sensor configured to capture an image of the one or more two-dimensional arrays of indicia marks provided on the sheet; a sheet transport configured to move the sheet past the sensor; and an image processor configured to analyze the captured image and to identify the position of the indicia marks and determine the spacing between adjacent indicia marks; wherein the two-dimensional array sensor comprises a pair of sensors arranged above and below the sheet of print media respectively to view both faces of the sheet of print media, and configured to capture the image from both faces of the sheet of print media; wherein the two-dimensional array sensor is a full width array (FWA) sensor which spans the cross-process length of the sheet.