A method analyzes image data of a test pattern printed on an image receiving member by a printer. The method includes identifying a process direction position for each row of dashes in a test pattern printed on an image receiving member, identifying a center of each dash in a cross-process direction, identifying an inkjet ejector that formed each dash in the row of dashes. These data are used to identify a process direction position for each printhead, a cross-process displacement for each column of printheads, and a stitch displacement in the cross-process direction between neighboring printheads in a print bar unit that print a same color of ink. An actuator can be operated with reference to the identified process direction positions, cross-process displacements, and the identified stitch displacements to move at least some of the printheads in the printer.