Patent ID: 7262879

Claim:
A method of making second generation halftone images lacking visible interference, comprising: selecting an image which has been halftoned by forming original halftone dots, wherein each halftone dot includes at least one pixel therefor; determining a number of tone levels required for each pixel of the selected halftoned image; arranging the number of tone levels in a set of tone levels; identifying a high-frequency halftone cell size; scanning the selected halftoned image to produce a second generation multi-level halftoned image, which retains the original halftone dots and pixels therein; reproducing, for each pixel in the second generation multi-level halftoned image, a pixel tone level; selecting, from the set of tone levels, a tone level closest to the pixel tone level of each pixel in the second generation multi-level halftoned image to minimize noise generated during scanning without constructing a new halftone center; arranging a dot growth pattern evenly across the second generation multi-level halftoned image.