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>>>>> "Ruud" == Ruud Harmsen <realemailonsite@xxxxxxxxxxxxxxxxxx> writes:
Ruud> Thu, 31 Aug 2006 17:16:09 +-0800: Lee Sau Dan
Ruud> <danlee@xxxxxxxxxxxxxxxxxxxxxxxxxx>: in sci.lang:
>> BTW, although printers generally have higher spatial resolution
>> than displays, they have a very limited colour resolution when
>> compared to True-Colour display cards +- monitors.
>> Non-photographic printers usually use dithering to create the
>> illusion of millions of colours out of only 4-6 available
>> colours.
Ruud> So do displays, using just 3 basic colours.
Ruud> http://rudhar.com/cgi-bin/cores.cgi
But each pixel can vary its brightness, giving a large range of shades
of the primary colour it has.
On printed media, it is usually not the case. A pixel is either
absorbs the ink/pigment and becomes coloured, or not. Laying more
ink/pigment on top of the pixel may not intensify the colour, as the
ink/pigment are opaque. So, essentially each pixel on printed medium
can either be on (bearing the colour of the pigment/ink) or off
(bearing the colour of the paper.
Of course, there are better printed media, such as photographic
devices. But they're less common and much more expensive.
--
Lee Sau Dan +Z05biGVm- +AH4-{@nJX6X+AH4-}
E-mail: danlee@xxxxxxxxxxxxxxxxxxxxxxxxxx
Home page: www.informatik.uni-freiburg.de/+AH4-danlee">http://www.informatik.uni-freiburg.de/+AH4-danlee
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