Ising-model image rendition, and consolidated masking and/or filtering, in incremental printing

摘要

The invention is for use in printing based on a digital-array representation (C i ) of an input image. Preferred method embodiments include calculating an offset weighted average of neighboring-pixel interactions with the particular pixel; and using the averages to find a final processed form of the image. These steps are done for each particular pixel in the array. In an apparatus aspect, the invention assumes a specific discrete value (1st pass) for use in a rendered form of the image, at each pixel; determines whether to perform a particular candidate change of each value to a different value, at substantially each stage in a series of successive approximations (1st pass ... 3rd pass) to a final rendered form (4th pass) of the image; and obtains a randomly or pseudorandomly selected discriminator for application by the determining means, in deciding whether to change substantially each value at substantially each stage.