For the constant tone fields on the test page, we consider the specific case of designing halftone patterns that will not show fine pitch banding that is within specification. The PQ test pages should be designed to not reveal such defects to the customer. We introduce the concept of imperfections within specification which are PQ defects that fall within the PQ specification of the printer.
We then incorporate these test features into a set of test pages for a specific print mechanism architecture. We design test features which clearly reveal the common PQ defects that occur with color laser printers, such as failure of color plane registration, ghosting, and repetitive artifacts. We develop a set of test pages for the customer to check the condition of a printer without using any other tools. A print quality (PQ) test page is a diagnostic tool which is designed for accurate and effcient diagnosis of PQ defects.
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