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Linear gamma

crabshank
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4 years 7 months ago - 3 years 2 months ago #1 by crabshank Linear gamma was created by crabshank

A very simple shader that reverse and applies transfer functions:

Then re-grade as you see fit, I suggest applying gamma (choosing your own value or algorithm could lead to better results) first.

The image above uses the inverse (sRGB) setting.

Download here

Last edit: 3 years 2 months ago by crabshank. Reason: Updated

The following user(s) said Thank You: Wicked Sick, sajittarius, jas01, Deathmedic, SIMJEDI, Cul

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crabshank
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4 years 5 months ago #2 by crabshank Replied by crabshank on topic sRGB to Linear RGB (approximation)

UPDATE: Included both transforms (to Linear and inverse).

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sajittarius

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4 years 4 months ago #3 by sajittarius Replied by sajittarius on topic sRGB to Linear RGB (approximation)

Would it be possible to make a version of this with an adjustable gamma slider? I tried it in Star Wars Jedi: Fallen Order with HDR on and its amazing but could use a tiny tweak to the gamma values.

This shader works in HDR, whilst many other gamma ones (LevelsPlus, Tonemap, etc) do not, so i could see it helping in a lot of games where the HDR seems washed out.

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crabshank
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4 years 4 months ago #4 by crabshank Replied by crabshank on topic sRGB to Linear RGB (approximation)

UPDATE: Separated transforms into separate techniques.

@sajittarius using my grey gamma shader after this should help.

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sajittarius

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4 years 4 months ago #5 by sajittarius Replied by sajittarius on topic sRGB to Linear RGB (approximation)

i think the grey gamma shader was what i was looking for in the first place (it works great for what i want just by tweaking that shader)

thank you

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crabshank
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3 years 7 months ago #6 by crabshank Replied by crabshank on topic Linear gamma

I have included more transfer functions in this shader, check my other shaders as I have added many more colour spaces to most of them.

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crabshank
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3 years 7 months ago #7 by crabshank Replied by crabshank on topic Linear gamma

Included a second instance so that one can easily convert back after applying other filters.

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SIMJEDI

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3 years 3 months ago #8 by SIMJEDI Replied by SIMJEDI on topic Linear gamma

Thanks for making this.

Can we please get an update. It looks like it is working (I think) in 4.8.2

I had to change DrawText_mod.fxh to DrawText.fxh in line 15 in order for it to compile and load. But a large box with letters in yellow and a warning pops up when I hover over it's name in the shaders list.

Thanks in advance.

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aen313

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3 years 1 month ago #9 by aen313 Replied by aen313 on topic Linear gamma

как скачать Linear gamma.fx ?

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Tojkar

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3 years 1 month ago #10 by Tojkar Replied by Tojkar on topic Linear gamma

aen313 wrote: как скачать Linear gamma.fx ?

OP has a link to the relevant GitHub page.

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