Canon Kabushiki Kaisha

Son Thai

Ben Yip

Paul Joseph Ellis

Disclosed are methods () and apparatuses () for determining a location of a graphical object () printed onto a print medium (), said graphical object comprising a plurality of object marks, the method comprising the steps of superposing a two-dimensional reference pattern () having a pre-defined degree of accuracy over the printed graphical object, the two-dimensional reference pattern comprising a plurality of pattern marks (); scanning the superposed printed graphical object and reference pattern to produce a scanned image (); determining a location coordinate () of the graphical object in the scanned image (); and refining the location coordinate dependent upon the scanned reference pattern to determine a reference pattern coordinate (') associated with the location coordinate (). Also disclosed are methods (), apparatuses, and computer program products for determining a head size () of a print head () of a printer () using the aforementioned method.

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Beverly Hills, Australia

Son Thai