MinBlurMod

/* MinBlurMod - slight modification of MinBlur
(original: http://avisynth.nl/index.php/MinBlur)

This has RGTools, RedAverage and Dither tools as dependencies. This is (mostly)
identical to the original, but using a median of three clips instead of a
two-input LUT. The wt parameter allows tweaking how much to blend in the blurred
result; using a negative value would have a sharpening effect instead.
*/

function MinBlurMod(clip clp, int r, int "uv", float "wt")
{
uv   = default(uv,3)
wt   = default(wt,1.0)
uv2  = (uv==2) ? 1 : uv
rg4  = (uv==3) ? 4 : -1
rg11 = (uv==3) ? 11 : -1
rg20 = (uv==3) ? 20 : -1
medf = (uv==3) ? 1 : -200

RG11c = (r==1) ? clp.removegrain(11,rg11)
 \    : (r==2) ? clp.removegrain(11,rg11).removegrain(20,rg20)
 \    :          clp.removegrain(11,rg11).removegrain(20,rg20).removegrain(20,rg20)
RG4c  = (r==1) ? clp.removegrain(4,rg4)
 \    : (r==2) ? clp.medianblur(2,2*medf,2*medf)
 \    :          clp.medianblur(3,3*medf,3*medf)

interleave(clp,rg11c,rg4c).rgtools_clense().selectevery(3,1)

(wt==1.0) ? last : raveragew(clp,1-wt,last,wt,lsb_out=true).ditherpost(mode=6)
}