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Old 10th February 2018, 21:01   #1  |  Link
lansing
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How do I blend pixels in a frame

I have a color palette and I want to blend the edge of every color with the one right next to it so that there's a smooth gradient in the transition. Is there any filter that can do this?

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Old 10th February 2018, 22:28   #2  |  Link
LoRd_MuldeR
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Downscale to a width of 8, using point-resize (nearest neighbor), then upscale to a width of 800 again, using your preferred kernel?

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Last edited by LoRd_MuldeR; 10th February 2018 at 22:30.
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Old 10th February 2018, 23:33   #3  |  Link
lansing
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Thanks it works for width of 8, but when I try to do it with 6 on a six color palette, it gives me an error "Resize error 3076: image shift or subwindow too great"
Code:
image = core.imwrif.Read(r'blend.png')
image = core.resize.Point(image, width=6, height=100)
blend_image = core.resize.Spline36(image, width=600, height=100)
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Old 10th February 2018, 23:36   #4  |  Link
Stephen R. Savage
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The 6-tap Spline36 filter is too wide to be used on a 6-pixel image. Either use more colors or choose a narrower filter.

Code:
# Two-stage approach.
c = core.std.BlankClip(width=6, height=1)
c = core.resize.Spline16(c, width=12, height=1)
c = core.resize.Spline36(c, width=600, height=1)

# Narrow filter approach
c = core.std.BlankClip(width=6, height=1)
c = core.resize.Spline16(width=600, height=1)
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Old 11th February 2018, 00:08   #5  |  Link
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Try a horizontal BoxBlur with many passes?
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Old 11th February 2018, 01:24   #6  |  Link
lansing
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Quote:
Originally Posted by Stephen R. Savage View Post
The 6-tap Spline36 filter is too wide to be used on a 6-pixel image. Either use more colors or choose a narrower filter.

Code:
# Two-stage approach.
c = core.std.BlankClip(width=6, height=1)
c = core.resize.Spline16(c, width=12, height=1)
c = core.resize.Spline36(c, width=600, height=1)

# Narrow filter approach
c = core.std.BlankClip(width=6, height=1)
c = core.resize.Spline16(width=600, height=1)
My color palette is going to be a lot wider than 6, so there's no need for the spline16 as the intermediate step?
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