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# CondLI - Conditional Luma Interpolator v 0.55

 

function LumaInterpolation(clip clp,bool "ym"){

ym=Default(ym,false)

clp

nnedi2(0)

w=width

h=height

c0=last

c1=blackmanresize(w,h*2,taps=8).mt_convolution("0 1 0","0 0 1",u=2,v=2).spline144resize(w,h)

ym? mergeluma(clp,c1) : mergeluma(clp,c0)

return last

}

 

function CondLI(clip clp,float "thr", float "thrm", float "darkm",bool "ym",bool "show"){

thr=Default(thr,20.0)

thrm=Default(thrm,1.0)

darkm=Default(darkm,1.5)

ym=Default(ym,false)

show=Default(show,false)

sthr=String(thr)

clp

li=LumaInterpolation(ym)

separatefields()

a=selecteven()

b=selectodd()

m=a.FrameEvaluate("condli_k=exp(-log("+string(darkm)+")*AverageLuma()/256)*"+string(darkm))

m=m.mt_lutxy(b,"x y > x y - y x -",u=-128,v=-128)

m.ConditionalFilter(clp,li,"YPlaneMax("+string(thrm)+")*condli_k",">",sthr)

show ? stackvertical(m.ScriptClip("""Subtitle(string(YPlaneMax(""" + String(thrm) + """)*condli_k),20,50)

Subtitle("darkm = """ + String(darkm) + """ / thrm = """ + String(thrm) + """ / thr = """ + String(thr) + """",20,20)"""),clp.subtitle("source"),li.subtitle("interpolated")) : last

}