General kernel function for electronic halftone generation

Details General kernel function for electronic halftone generation General kernel function for electronic halftone generation

H - Electricity

04

N

H04N 1/23 (2006.01) H04N 1/405 (2006.01)

Patent

CA 2051331

There is disclosed an algorithm for use with a digitized image which provides a means of simulating a continuous tone image containing a range of gray shades from black to white or a color separation. The "threshold equation" is the key of the invention as it calculates a threshold gray value that is compared to the desired local image value to determine whether that particular point should be "on" or "off". Which points (spots) are "on" and which are "off" is determined by the function that assigns a "threshold" value (the shade at which a pixel changes from "off" to "on") based on a pixels "x" and "y" coordinates.

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