1. A computer-executable method of electronic registration for correcting one or more process direction displacement defects in an input image, comprising: receiving, at a first resolution, line buffer data describing input image pixels; extracting contone pixels intersecting physical raster lines traversed by a displaced raster line with displacement in the process direction in the input image using one or more compensation parameters; transforming the extracted contone pixels to a second resolution that is a higher resolution than the first resolution; generating a compensated high-resolution contone raster line from the transformed extracted contone pixels; determining indices that describe a shape of the raster line; extracting halftone thresholds using the determined indices, the thresholds substantially corresponding to the shape of the raster line; generating high-resolution binary pixel data for the raster line by applying the extracted displaced halftone thresholds to the high-resolution contone raster line; outputting the high-resolution binary pixel data to an imager; and outputting an output image from the imager wherein the displacement defect(s) is removed.