Author Topic: MLV App 1.12 - All in one MLV Video Post Processing App [Windows, Mac and Linux]  (Read 622063 times)

avaneev

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Hi! Have the MLV App authors tried to apply non-linear "saturation" image transformations in a higher resolution, with a later downsizing step? This is not a common technique, but from the DSP standpoint it should look much better. "Aliasing" is not the whole story like in image resizing, there's also "harmonic distortion", which is not as apparent with images as it is with audio. Maybe worth a try.

avaneev

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A follow-up: the same actually applies to "linearization" or sRGB->linear conversion. It's a non-conventional approach and is resource-heavy, but probably it will fix the feel of all these gamma corrections being "not right".

2blackbar

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It is possible to use sinus in transfer function and create non linear curve but whats the exact formula for non linear film gamma ?

masc

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Let's welcome @avaneev here in ML forum - the author of AVIR resizing algorithm. Nice to have you here and thank you again for your great work!

We already discussed the same questions a little bit here: https://github.com/avaneev/avir/issues/8#issuecomment-830816642
@Ilia: would be cool if you could join the discussion - you know best about the processing engine

@2blackbar: yes, all math functions are "poosible" but might look strange. For different profile functions you'll find the gamma variable at very different places.
5D3.113 | EOSM.202