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Both of these dithering methods are from http://pippin.gimp.org/a_dither/ for
GIF they can be considered better than bayer (provides more gray-levels), and
spatial stability - often more than twice as good compression and less visual
flicker than error diffusion methods (the methods also avoids error-shadow
artifacts of diffusion dithers).
These methods are similar to blue/green noise type dither masks; but are
simple enough to generate their mask on the fly. They are still research work
in progress; though more expensive to generate masks (which can be used in a
LUT) like 'void and cluster' and similar methods will yield superior results
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See Ticket3486
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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That's the more proper place where the scaler options should be
documented.
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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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This should simplify inclusion in monolithic tool manuals.
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