The ink-jet marking process offers several unique opportunities for producing
quality hard-copy images. There are, however, certain limitations and requirements
of the technology that must be taken into account when developing imageprocessing
procedures and algorithms for ink-jet printing systems.
This paper describes a number of issues that set ink-jet apart from many of the
other marking processes. For example, ink-jet can be treated as a truly "binary"
marking process. Thus, single isolated pixels are easily and reproducibly formed on
the marking substrate. Halftoning procedures have been developed that take
advantage of this attribute to produce more gray levels for a given resolution. Ink
coverage on paper, however, must often be limited to < 200% . Also, the perceived
color will be dependent on the order in which the colors are delivered to the
marking substrate. Examples illustrating these and other concerns are given.
Optimal image-processing procedures for the ink-jet marking process can be
developed based on an understanding of these and other ink-jet specific issues.