The most commonly used method for distortion compensation is vector scaling. Vector scaling does not randomize the removal of pixels, so all straight lines remain straight. This is, of course, a drawback if the files contain Copydot data, as artifact lines can appear in halftone dot rows after scaling. Most flexo printers prefer to use vector scaling for flexo distortion.
Vector scaling
Note: For a detailed analysis of the effects of raster scaling on print output, see Comparison of TIFFs, plates and print samples from scaled and resampled images.