Systems and methods that shift the halftone screen relative to the image
data in the low-addressability direction to compensate for
misregistration would be useful. In various exemplary embodiments of the
systems and methods of this invention, each pixel of the halftone cell is
first divided into high-addressability pixels at the high-addressability
factor. The high-addressability factor is the ratio between the base
resolution and the high-addressability resolution. The
high-addressability pixels are then divided into subrows using the same
high-addressability factor. Each high-addressability pixel in each subrow
is then assigned its own threshold value. By shifting the threshold
values between adjacent subrows based on the subrow, a particular
halftone pattern in the low-addressability direction is implemented.
Then, by appropriately selecting the particular subrow to select a
particular set of threshold values, the halftone screen can be shifted at
the high-addressability resolution along the low-addressability
direction.