Image on paper registration using image marks

A system for adjusting the registration of an image printed on sheets in a marking device, wherein the sheets each include at least four separate corners defining a periphery thereof, each corner defined by two adjoining sheet edges, the system comprising:

• an at least one image sensing device determining a first image location on a first sheet by measuring for each of at least three corners of each first sheet the distance between the two adjoining edges of the respective at least three first sheet corners to a portion of at least one first fiducial mark, wherein for each of the at least three first sheet corners the measured portion of the at least one first fiducial mark is closer to that respective corner than any other of the first sheet corners;
• a controller for adjusting a second image to be printed, the controller operatively coupled to the image sensing device, wherein the second image is adjusted by changing relative to a second sheet at least one of a size, shear, position and orientation of the second image based on the determined first image location;
• and
• at least one print engine for generating the adjusted second image, the print engine operatively coupled to the controller, wherein the adjusted second image is printed to at least one second sheet;
• wherein said at least one image sensing device being in-line with said at least one print engine to allow for the determining of the first image location automatically in-line,
• wherein the image sensing device further determines a third image location on a second side of the at least one first sheet by measuring for each of at least three corners of each first sheet the distance between the two adjoining edges of the respective at least three first sheet corners to a portion of at least one second fiducial mark, wherein for each of the at least three first sheet corners the measured portion of the at least one second fiducial mark is closer to that respective corner than any other of the first sheet corners,
• wherein the controller adjusts a fourth image to be transferred by changing, relative to a second side of the second sheet, at least one of a size, shear, position and orientation of the fourth image based on the determined third image location, wherein the print engine generates the adjusted fourth image for printing to the second side of the second sheet.