Re: LF: Updated GrayScale Converter for PC
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Re: LF: Updated GrayScale Converter for PC
Carl Turner wrote:
> i.e. 3 colors, white, black, and gray. two bin files for black and gray. since there is
> no need for the white bitmap.
Just wanted to clarify how the greyscale works...
there are 2 "bitplanes" what could be better called virtual screens.
what is done to make greyscale is that the 2 screens are switched back
and forth rapidly, showing one for about 3/4 of the time, and the other
about 1/3 of the time. to get black, you would want the pixle on *all*
of the time, so you set it to 1 on both bitplanes. your right about
white, in that it is not needed.
but you statement should have been: " i.e. *4* colors, white, black,
and *2 different grays*. two bin files for *light and dark gray*. since
there is no need for the *white or black bitmaps*"
(changed parts in **)
You mix both greys to make black, or turn them both off to make white
> Carl Turner
> cturner@garfield.leesummit.k12.mo.us
> http://garfield.leesummit.k12.mo.us/~cturner/
--
Christopher Poole
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