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PostPosted: Mon Jan 21, 2019 7:11 pm 
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I successfully emulated an adaptive NTSC comb filter in GIMP. I used 4 different filtering modes, a vertical filter, a horizontal filter, and 2 diagonal filter, and I used edge detection to determine which of the 4 filters to use. Non-edges use the average of the 4 filter types.

Attachment:
NTSC comb filtered Sailor Moon.png
NTSC comb filtered Sailor Moon.png [ 549.38 KiB | Viewed 4759 times ]


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PostPosted: Tue Jan 22, 2019 3:56 pm 
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https://graphicdesign.stackexchange.com ... -sequences

https://www.youtube.com/watch?v=VWWDREG1JgA
https://www.youtube.com/watch?v=xsuRqVm96NE
https://www.youtube.com/watch?v=iMep8NMo6kI

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PostPosted: Tue Jan 22, 2019 5:11 pm 
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bazza wrote:
https://graphicdesign.stackexchange.com/questions/87906/gimp-custom-filters-out-of-other-filter-sequences

https://www.youtube.com/watch?v=VWWDREG1JgA
https://www.youtube.com/watch?v=xsuRqVm96NE
https://www.youtube.com/watch?v=iMep8NMo6kI

This is all fake video simulations though, I'm pretty sure psycopathicteen is talking about real NTSC encoding.


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PostPosted: Tue Jan 22, 2019 5:34 pm 
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I tried to do the same thing as the Sailor Moon picture with the title screen of SMAA+SMW, and for some reason I can't get the outline and shading of Mario's hat from bleeding. Did Mario's hat always bleed on NTSC? I remember it being sharp and clear on my TV set.


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PostPosted: Tue Jan 22, 2019 7:00 pm 
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tokumaru wrote:
bazza wrote:
https://graphicdesign.stackexchange.com/questions/87906/gimp-custom-filters-out-of-other-filter-sequences

https://www.youtube.com/watch?v=VWWDREG1JgA
https://www.youtube.com/watch?v=xsuRqVm96NE
https://www.youtube.com/watch?v=iMep8NMo6kI

This is all fake video simulations though, I'm pretty sure psycopathicteen is talking about real NTSC encoding.


I thought that only only wish effects CRT
Better real conversion :D

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PostPosted: Mon Jan 28, 2019 4:52 pm 
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Attachment:
Super Mario NTSC.png
Super Mario NTSC.png [ 383.37 KiB | Viewed 4238 times ]


For this one, I used a high-pass filtered chroma signal instead of a band-pass filtered chroma signal. This technique would work with composite, but not very well with RF because of chroma bandwidth.


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