How to shift RGB planes?

[kuchikirukia]

I have a Bluray with convergence issues, but I have no idea how to shift or recombine RGB.

[LemMotlow]

Isn't BluRay YV12 ?

[kuchikirukia]

Isn't BluRay YV12 ?

Not after converttorgb()

[Reel.Deel]

Not after converttorgb()

Is there a reason you're doing that? Maybe upload a small sample.

[kuchikirukia]

Is there a reason you're doing that? Maybe upload a small sample.

It's pretty obvious. Green and blue are a full pixel off. I just don't know if there's a better way to shift than resizing or how to merge since mt_merge doesn't work in RGB.

[poisondeathray]

It's pretty obvious. Green and blue are a full pixel off. I just don't know if there's a better way to shift than resizing or how to merge since mt_merge doesn't work in RGB.


For RGB, Use showred("YV12"), showgreen("YV12"), showblue("YV12") etc... then your shift manipulation. MergeRGB(r,g,b) once you've shifted

For full pixel shift, crop and addborders. For subpixel shifts, use the additional resize arguments

To shift UV planes instead of RGB, use chromashiftsp

[Reel.Deel]

Here's how to shift the green and blue channels to the left by one pixel. The shift is done as lossless as possible, one side gets cropped the other gets padded. Only downside is that is not possible to do subpixel shifting. Needs Padding() from here (http://forum.doom9.org/showpost.php?p=1596804&postcount=5). If you need to the right adjust the parameters accordingly.

#RGB source
o = last
r = o
g = ShowGreen(o, "Y8").Crop(1,0,0,0).Padding(0,0,1,0)
b = ShowBlue (o, "Y8").Crop(1,0,0,0).Padding(0,0,1,0)

MergeRGB(r,g,b)

[raffriff42]

This one does subpixel shifting, and can also fix convergence error changing across the image.

For example:
if red is left-shifted by 2px on the left side of the image, but it's correct on the right side, you would call
ShiftRedBlue(rx=2, rxd=-2)
if red is correct on the on the left side of the image, but it's left-shifted by 2px on the right side, you would call
ShiftRedBlue(rx=0, rxd=2)##################################
### shift and/or resize Red and Blue relative to Green
##
## @ rx, ry, bx, by - "shift" red & blue position
## @ rxd, ryd, bxd, byd - "delta" width & height
##
function ShiftRedBlue(clip C,
\ float "rx", float "ry",
\ float "bx", float "by",
\ float "rxd", float "ryd",
\ float "bxd", float "byd")
{
Assert(C.IsRGB,
\ "ShiftRedBlue: source must be RGB")
rx = Float(Default(rx, 0))
ry = Float(Default(ry, 0))
bx = Float(Default(bx, 0))
by = Float(Default(by, 0))
rxd = Float(Default(rxd, 0))
ryd = Float(Default(ryd, 0))
bxd = Float(Default(bxd, 0))
byd = Float(Default(byd, 0))
C
return (C.IsRGB24)
\ ? MergeRGB(
\ ShowRed.Spline64Resize(Width, Height, -rx, -ry, Width-rxd, Height-ryd)
\ , ShowGreen
\ , ShowBlue.Spline64Resize(Width, Height, -bx, -by, Width-bxd, Height-byd)
\ )
\ : MergeARGB(
\ ShowAlpha
\ , ShowRed.Spline64Resize(Width, Height, -rx, -ry, Width-rxd, Height-ryd)
\ , ShowGreen
\ , ShowBlue.Spline64Resize(Width, Height, -bx, -by, Width-bxd, Height-byd)
\ )
}

[kuchikirukia]

Here's how to shift the green and blue channels to the left by one pixel. The shift is done as lossless as possible, one side gets cropped the other gets padded. Only downside is that is not possible to do subpixel shifting. Needs Padding() from here (http://forum.doom9.org/showpost.php?p=1596804&postcount=5). If you need to the right adjust the parameters accordingly.

#RGB source
o = last
r = o
g = ShowGreen(o, "Y8").Crop(1,0,0,0).Padding(0,0,1,0)
b = ShowBlue (o, "Y8").Crop(1,0,0,0).Padding(0,0,1,0)

MergeRGB(r,g,b)

Thanks. With an added resize for subpixel shifting, that worked.