On Tue, 27 Feb 2001 19:43:01 -0500 Austin Franklin (austin@darkroom.com)
wrote:
> "Dithering is a process in which an application chooses two or more colors
> from a palette, and then applies them to adjacent pixels to approximate
> colors outside of the palette."
>
> "Halftoning is the process of breaking down a continuous tone image into
> solid spots of differing sizes to create the illusion of transitioning grays
> or colors in a printed image."
Exactly, though it's worth adding that the patterning of dithering
usually varies according to tone and colour, whilst droplet size does not (OK
it does, a bit, in some newer printers). In halftoning, the pattern is a fixed
matrix, with variations in tone being created by varying the size of the dots.
Regards
Tony Sleep
- Online portfolio & exhibit; + film scanner info &
comparisons
