Method and apparatus for an image gray scale using a blue noise mask.

PRESENTED METHOD AND SYSTEM FOR CONVERSION IN AN IMAGE midtone AN IMAGE OF GREYSCALE (500) USING A COMPARISON OF PIXEL TO PIXEL (402) IMAGE GREYSCALE AGAINST A BLUE MASK NOISE ( 502), in which method IMAGE greyscale EXPLORE ON AN PIXEL TO PIXEL and compared ON AN PIXEL TO PIXEL WITH AN ARRAY OF DATA POINTS FOR CONTENT IN A mASK BLUE NOISE STORED IN A PROM (406) or the memory of a computer to produce halftone image DESIRED. METHODS HAVE BEEN DISCOVERED halftones IMPLEMENTED digital and optically. ALSO it PRESENTED THE SPECIFIC CHANGES IN THE IMPLEMENTATION OF THE MASK BLUE NOISE and their use for producing color images halftones.