Printing using fiducial marks

A method, comprising:

• printing an image and fiducial marks on a first side of a print medium, wherein the fiducial marks comprise:
• a set of first marks ahead of the image, wherein each of the first marks has a first length and is located at a second distance from a beginning edge of the image, wherein two of the first marks are end marks at a first distance from respective opposite edges of the print medium, wherein the remaining first marks of the set are arranged as an array along a width of the print medium, and wherein the first marks in the array are separated from each other, as well as the first of the array separated from one of the end marks, by a fourth distance;
• and
• a set of second marks along a length of the print medium, wherein each of the second marks is at the first distance from the respective opposite edges, has a second length smaller than the first length, and is at a third distance from another second mark;
• scanning, using a sensor, the fiducial marks while the fiducial marks are backlit by a light source;
• and
• printing a registered mirrored copy of the image on the second side of the print medium using respective relative positions of at least some of the scanned fiducial marks to the image.

A non-transitory machine-readable medium stored thereon machine executable instructions, which when executed by a machine, performs a method comprising:

• printing an image and fiducial marks on a first side of a print medium, wherein the fiducial marks comprise:
• a set of first marks ahead of the image, wherein two of the first marks are end marks at a first distance from respective opposite edges of the print medium, and each of the first marks has a first length and is located at a second distance from a beginning edge of the image;
• and
• a set of second marks along a length of the print medium, wherein each of the second marks is at the first distance from the respective opposite edges, has a second length smaller than the first length, and is at a third distance from another second mark;
• scanning, using a sensor, the fiducial marks while the fiducial marks are backlit by a light source;
• and
• printing a registered mirrored copy of the image on the second side of the print medium using respective relative positions of at least some of the scanned fiducial marks to the image.