Procedure and apparatus for reproducing an image in halftone grayscale using a blue noise mask.

摘要

SE discloses a method and system for a halftone image FROM AN IMAGE greyscale (500) using the comparison PIXEL TO PIXEL (402) of an image greyscale FACE A noise mask BLUE (502), IN WHICH THE IMAGE OF GREYSCALE is scanned ON AN PIXEL TO PIXEL AND COMPARISON FOR A BASE OF PIXEL TO PIXEL TO A TABLE WITH RELEVANT POINTS OF DATA CONTAINED IN THE mASK OF NOISE BLUE STORED IN A PROM (406) or the memory of a computer to produce halftone image DESIRED. Both methods HALFTONE DIGITALLY IMPLEMENTED OPTICALLY AND ARE REVEALED. ALSO REVEAL SPECIFIC AMENDMENTS TO IMPLEMENTATION OF BLUE NOISE MASK, AND THEIR USE FOR PRODUCING COLOR IMAGES WITH semitones.