System and method for spatial dependent correction for images printed with multiple drop parameters

摘要

A method of operating a printer includes identifying a halftone level a first ink drop parameter corresponding to a contone level in image data for using a contone to halftone mapping. The method includes operating printheads to form a printed pattern using the first ink drop parameter and identifying a reflectance level of the printed pattern in scanned image data. The method includes modifying the halftone level in the mapping if the identified reflectance level is outside of a tolerance range from a normalized reflectance value associated with the contone level and storing the modified halftone level in a memory for printing the contone level.

主权项

1. A method of operating an inkjet printer comprising:
identifying with a controller a first halftone level corresponding to a contone level for a first ink drop parameter in a plurality of ink drop parameters with reference to at least one mapping between a plurality of contone levels and a first plurality of halftone levels corresponding to the first ink drop parameter stored in a memory;
operating at least one printhead to eject ink drops with at least the first ink drop parameter to form a printed pattern on an image receiving surface, the at least one printhead being operated with reference to the first halftone level to form the printed pattern corresponding to the contone level;generating with an optical sensor first scanned image data corresponding to the printed pattern on the image receiving surface;identifying with the controller a first reflectance level of the printed pattern in the first scanned image data;modifying with the controller the first halftone level in the at least one mapping in response to the first reflectance level being different than a predetermined reflectance level stored in the memory in association with the contone level; and storing with the controller the modified first halftone level in the at least one mapping in the memory to enable printing of halftone patterns with the predetermined reflectance level.