Second suggestion : A black & white mode

suggest a way to improve Neat Video
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jpsdr
Posts: 215
Joined: Mon Aug 11, 2008 7:33 am

Second suggestion : A black & white mode

Post by jpsdr » Mon Aug 18, 2008 10:43 am

My other suggestion is more generic, and not specific to VDub.

I think having a black & white (or Y only) mode could be interesting.

This mode would work this way :

- Process only Y channel => speed improvement. Cb and Cr channel simply put to 0 (or 128).
- In manual tuning, no message about "clipping" or "non uniform" on Cb/Cr channel, even if
there is, beacause they'll be erased !

The purpose is, as you may have guessed, to work on old black and white movies.
In this case, building noise information on Cb/Cr channels, and spending time
to process them is totaly irrelevent.

NVTeam
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Joined: Thu Sep 01, 2005 4:12 pm
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Post by NVTeam » Mon Aug 18, 2008 3:41 pm

Thank you for the suggestion.

Having a dedicated grayscale mode could be useful, especially if that was directly supported by plug-in hosts.

However, even the current version of Neat Video can used to efficiently process grayscale video data represented as RGB:

- if you set the noise reduction amounts in the Cr and Cb channels to 0% then the filter will only filter the Y channel and will work faster;
- the clipping / non uniform warnings related to the Cr and Cb channels can simply be ignored when you know that you work with grascale videodata;
- the filtration results will be as good as with a dedicated grayscale mode.

Kind regards,
Vlad

jpsdr
Posts: 215
Joined: Mon Aug 11, 2008 7:33 am

Re: Second suggestion : A black & white mode

Post by jpsdr » Sun Jun 09, 2019 1:08 pm

I re-suggest this, mostly to avoid "Not Uniform Cr Cb" message in a Black and White movie, i've used Greyscale (avisynth script) before sending to NV.

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