floating chroma shift issue?

[Selur]

Second parameter is float "varC" = variance chroma, which should be sigma_vU, sigma_vV in vsTCanny. Not sigmaU.
more something like:

v2= vsTCanny(v2, sigmaY=50.0, sigma_vU=50.0 + gblur, sigma_vV=50.0 + gblur, mode=-1)

(using 50 instead of 7)

[cinephil]

Well, "=50" - rises the highlights (unlike "=7"), but either way not resolve "border" issue.

Not sure what "variance chroma" mean exactly, but I guess it somewhat different from "Standard deviation of vertical gaussian blur" - which in vsTCanny is sigma_vY, sigma_vU, sigma_vV (and sigmaY, sigmaU, sigmaV - Standard deviation of horizontal gaussian blur.)

[Selur]

It should be the deviation for U and V as I understood it. )
I assume you did simplify your script to stop after the ContrastMask calls to be sure this is not caused by something else, right?

[cinephil]

I assume you did simplify your script to stop after the ContrastMask calls to be sure this is not caused by something else, right?

Well, if I will not tweak after ContrastMask - the picture will be wash out and I won't see any difference.
Right now it look like this:

old ContrastMask

SeparateFields()
MergeChroma(last, Spline36Resize(width/2, height).aWarpSharp2(depth=30).nnedi3_rpow2(2, cshift="Spline36Resize", fwidth=width, fheight=height))
Weave()

ConvertToYV12(matrix="rec601", interlaced=true)

SeparateFields() 
even = SelectEven(last).ContrastMask(enhance=3.0)
odd = SelectOdd(last).ContrastMask(enhance=3.0)
Interleave(even, odd)
Weave()

ConvertBits(16) 

ColorYUV(gamma_y=-35, cont_y=46, gain_y=-10, off_y=0)
Tweak(bright=3, coring=false)
Tweak(cont=0.9)
Tweak(Hue=-16)

FFT3DFilter(bt=-1, sharpen=0.3, interlaced=true)

ConvertBits(bits=8, dither=1)

new ContrastMask

ConvertBits(16) 

SeparateFields()
MergeChroma(last, Spline36Resize(width/2, height).aWarpSharp2(depth=30).nnedi3_rpow2(2, cshift="Spline36Resize", fwidth=width, fheight=height))
Weave()

SeparateFields()
even = SelectEven(last).ContrastMask(enhance=3.0)
odd = SelectOdd(last).ContrastMask(enhance=3.0)
Interleave(even, odd)
Weave()

ColorYUV(gamma_y=-35, cont_y=46, gain_y=-10, off_y=0)
Tweak(bright=3, coring=false)
Tweak(cont=0.9)
Tweak(Hue=-16)

FFT3DFilter(bt=-1, sharpen=0.3, interlaced=true)

ConvertBits(bits=8, dither=1)
ConvertToYV12(matrix="rec601", interlaced=true)