Process for providing digital halftone image with random error diffusion, color correction and enlargement

A digital halftoning process comprising the steps of:

• processing an image comprising a plurality of pixels by determining intensity values for each of the plurality of pixels;
• performing one weight error diffusion, the one weight error diffusion including the steps of:
• encoding an intensity value as a first binary value for each pixel when the determined intensity is less than a predetermined threshold value, and as a second binary value when the determined intensity is greater than the predetermined threshold value,
• calculating an error value corresponding to the difference between the intensity value and a predetermined value,
• randomly selecting a pixel either at a first location relative to the pixel presently being processed or a second location relative to the pixel presently being processed by sequentially outputting binary values from a table of a limited number of randomly generated binary values, wherein the step of randomly selecting a first or a second location includes using a random number corresponding to an arbitrary address in the table of binary values to begin an output sequence of binary values, and
• adding the error value to an intensity value of the selected pixel;
• and
• performing one weight error diffusion for a next pixel value following a raster scan pattern.