• Øyvind Kolås's avatar
    swscale: add two spatially stable dithering methods · 3e601662
    Øyvind Kolås authored
    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
    3e601662
output.c 80.9 KB