I have a question about gamma correction.

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I have a question about gamma correction. I have a 20x20 APA102 panel and it looks like the gamma is way off.

I see there is a function in FastLED to apply a gamma curve but I can’t seems to find any examples.

I also read this article that uses what seems to be a LUT to adjust the gammma

My application is pretty simple, i basically I am reading RGB values from an SD card and displaying them on the panel.

I would love some pointers.

Cheers.

Phil

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Here’s one way I’ve seen a correction applied:

Check out this post for some more discussion:
https://plus.google.com/+JeremyWilliams1/posts/DWL9gHr1Nyn

Of course, even better would be to figure out what adjustment to apply to the image before saving to the SD card so it’s just ready to use.

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Thanks. I could easily adjust the gamma of my video before I display it but it’s one extra step I’d like to avoid as I imagine the content changing frequently.

I’ll check the links out.