Patent ID: 8585173

Claim:
A method for analyzing image data of a test pattern generated by a printer comprising: identifying in image data of an image receiving member an area of the image receiving member in which a test pattern has been printed, the test pattern having dashes formed with a first predetermined number of ink drops of a first color and dashes formed with a second predetermined number of ink drops of a second color, the first predetermined number being different than the second predetermined number; identifying a process direction position for the test pattern printed in the identified area, the test pattern being formed by each printhead in a printer forming at least one dash in the test pattern; identifying a center of each dash in a cross-process direction; identifying an inkjet ejector that formed each dash in the test pattern; identifying an inkjet ejector expected to form a dash in the test pattern that failed to form the dash; and modifying operation of inkjet ejectors in the printer in response to at least one inkjet ejector being identified as expected to form a dash in the test pattern and failing to form the dash.