Bright and dark horizontal bars at bottom of video removal

[killerteengohan]

There are obvious horizontal bars at the bottom of the video. It kind of looks like halo's or edge sharpening artifacts.

How can I get rid of it or blend it better so it is not nearly as obvious? I do not wish to just crop it off if that can be helped.



It looks like a bright bar at the bottom, a darker middle one, and a brighter one above that before it finally gets into the normal picture.

[killerteengohan]

I tried referencefixer, but it doesn't seem to be giving me any kind of good results.
http://avisynth.nl/index.php/EdgeFixer

[Selur]

Try some dehalo filters, Abcxyz does seem to remove at least the line at the bottom line and other dehalo filter probably can remove or at least lessen the upper line strength. With edgefixer try a strenght of 150.

[jagabo]

Yes, something like dehalo_alpha(rx=1.0, ry=3.0, brightstr=1.0, darkstr=1.0) gets rid of most of it. Use a mask to limit the filter to the bottom edge so it doesn't mess with the rest of the picture.

[killerteengohan]

Yes, something like dehalo_alpha(rx=1.0, ry=3.0, brightstr=1.0, darkstr=1.0) gets rid of most of it. Use a mask to limit the filter to the bottom edge so it doesn't mess with the rest of the picture.

I'm still not the greatest with masks, but I did try something else you showed me in the past called boxfill before I saw this post.

It's giving me better results than I got with the dehalo settings suggested.

dark = ColorYUV(gain_y=32)
mask = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 1071, 1920, 3, $FFFFFF).Blur(1.0).Blur(1.0)
Overlay(last, dark, mask=mask) #lightens dark line to try and match levels
dark2 = ColorYUV(gain_y=20)
mask2 = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 1065, 1920, 5, $FFFFFF).Blur(1.0).Blur(1.0)
Overlay(last, dark2, mask=mask2) #lightens dark line to try and match levels
dark3 = ColorYUV(gain_y=-18)
mask3 = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 1065, 1920, 14, $FFFFFF).Blur(1.0).Blur(1.0)
Overlay(last, dark3, mask=mask3) #darkens entire matched lighter area at bottom

I cant get it perfect, but it works somewhat. I still see a bit of leftover or I make some spot in between too bright. Perhaps you can tweak it some?

[killerteengohan]

I couldnt get the dehalo filter to work to my liking, but after a long time of trial and error, I finally got something I think worked out nice.

dark = ColorYUV(gain_y=7)
mask = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 1071, 1920, 3, $FFFFFF)
Overlay(last, dark, mask=mask)
dark2 = ColorYUV(gain_y=4)
mask2 = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 1066, 1920, 3, $FFFFFF)
Overlay(last, dark2, mask=mask2)
dark3 = ColorYUV(gain_y=-6)
mask3 = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 1074, 1920, 3, $FFFFFF)
Overlay(last, dark3, mask=mask3)
dark4 = ColorYUV(gain_y=-4)
mask4 = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 1071, 1920, 9, $FFFFFF)
Overlay(last, dark4, mask=mask4)
dark5 = ColorYUV(gain_y=-2)
mask5 = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 1073, 1920, 4, $FFFFFF)
Overlay(last, dark5, mask=mask5)

Thanks for the ideas!!

[jagabo]

That looks pretty good for the sample image. But the oversharpening halos may differ depending on the brightness of the picture (the higher the contrast between the black border and the picture content, the stronger the halos will be). Check other parts of the video.

[killerteengohan]

That looks pretty good for the sample image. But the oversharpening halos may differ depending on the brightness of the picture (the higher the contrast between the black border and the picture content, the stronger the halos will be). Check other parts of the video.

Yeah, I agree. The entire episode has them in exactly the same spots except the opening theme song. The settings work just as well in the brighter scenes too. I just needed to tweak things a little for a better middleground, and looking at a brighter scene helped. They are the same size, and shape as well, so in this case it works out luckily, but yeah what you said is certainly true.

I managed to improve it a bit more by adjusting the settings a bit, and also get the top and left side as well.

dark = ColorYUV(gain_y=6)
mask = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 1071, 1920, 3, $FFFFFF)
Overlay(last, dark, mask=mask)
dark2 = ColorYUV(gain_y=3)
mask2 = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 1066, 1920, 2, $FFFFFF)
Overlay(last, dark2, mask=mask2)
dark3 = ColorYUV(gain_y=-2)
mask3 = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 1074, 1920, 3, $FFFFFF)
Overlay(last, dark3, mask=mask3)
dark4 = ColorYUV(gain_y=-4)
mask4 = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 1071, 1920, 9, $FFFFFF)
Overlay(last, dark4, mask=mask4)
darkl = ColorYUV(gain_y=-2)
maskl = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 0, 13, 1080, $FFFFFF)
Overlay(last, darkl, mask=maskl)
darkt = ColorYUV(gain_y=3)
maskt = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 15, 1920, 2, $FFFFFF)
Overlay(last, darkt, mask=maskt)
dark2t = ColorYUV(gain_y=3)
mask2t = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 10, 1920, 3, $FFFFFF)
Overlay(last, dark2t, mask=mask2t)
dark3t = ColorYUV(gain_y=-2)
mask3t = BlankClip(width=width, height=height, color=$000000).BoxFill(0, 5, 1920, 4, $FFFFFF)
Overlay(last, dark3t, mask=mask3t)
crop(10,8,-10,-4)
nnedi3_rpow2(2, cshift="LanczosResize", fwidth=1920, fheight=1080, nns=4)

[jagabo]

Yes, that looks pretty good.