M4X

function m4x(clip v)
{###(c) MWilson 2018
v=v.converttoyv12()
a=v.lanczos4resize(width(v)*4,height(v)*4)
b=v.gaussresize(width(v)*4,height(v)*4)
m=merge(a,b.Invert())
rm=m.m10()
uu_mt_blend(b,rm,1,"gmerge",3)
return last
}