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TV backlight compensation (2020)

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Re: TV backlight compensation (2020)

#2

Post by nagonago »

Clever solution! It kind of reminds me of when I sometimes run sound through customized EQ and compression to compensate for crappy speakers. My approach is not quite as scientific as this though, just "tweak until it sounds good."

I didn't know there was a version of MPC with a live shader editor, that is also very cool. This is actually a pretty good use case for such a feature.

Re: TV backlight compensation (2020)

#4

Post by justusw »

This is such a cool idea and execution. I also like the DIY approach to patching MPC BE yourself, which shows how far OSS can take you.

I wonder, when applying a linear transformation like in the shader described, will the total available color space decrease? Simply put, if a one-dimensional color value on the arbitrary scale between 1 and 100 needs to be decreased by 20 for correction, the resulting maximum will be 80. Does that mean the total available color values will be less?

Re: TV backlight compensation (2020)

#6

Post by Retr0id »

Wow, I'm very glad to see this!

This exact idea has been floating around in my head for ages, and I always wondered how well it actually worked - now I don't need to wonder. I started thinking about it as a potential solution to OLED burn-in. Thankfully, my OLED TV doesn't have any burn-in yet, so I never needed to investigate further.

Re: TV backlight compensation (2020)

#7

Post by xvector »

Retr0id wrote: post #6

Wow, I'm very glad to see this! This exact idea has been floating around in my head for ages, and I always wondered how well it actually worked - now I don't need to wonder. I started thinking about it as a potential solution to OLED burn-in. Thankfully, my OLED TV doesn't have any burn-in yet, so I never needed to investigate further.

OLED TVs already compensate for burn in. A lot of your pixels are probably already somewhat "burnt" but you can't perceive it due to the corrective measures your TV takes. You'll only really notice it when it's irredeemably bad.

Re: TV backlight compensation (2020)

#8

Post by adrianN »

axiolite wrote: post #5
unglaublich wrote: post #3

I wouldn't call this over-engineering. It's a reasonable solution to an actual problem.

I think the reasonable solution is: Buy a new TV. We're not talking about a jumbotron display here. A cheap new TV with proper color is likely very inexpensive.

Why create waste when it's not necessary?

Re: TV backlight compensation (2020)

#9

Post by klodolph »

justusw wrote: post #4

This is such a cool idea and execution. I also like the DIY approach to patching MPC BE yourself, which shows how far OSS can take you. I wonder, when applying a linear transformation like in the shader described, will the total available color space decrease? Simply put, if a one-dimensional color value on the arbitrary scale between 1 and 100 needs to be decreased by 20 for correction, the resulting maximum will be…

No. Color perception is relative.

Basically, what you are doing is adding a cast to the image. This cast cancels out with the cast that the backlights give. When you add two complementary color casts to each other, you end up with neutral gray.

This results in an image which is darker, but still has the full color range that the TV is designed for.

Re: TV backlight compensation (2020)

#10

Post by Candas1 »

xvector wrote: post #7
Retr0id wrote: post #6

Wow, I'm very glad to see this! This exact idea has been floating around in my head for ages, and I always wondered how well it actually worked - now I don't need to wonder. I started thinking about it as a potential solution to OLED burn-in. Thankfully, my OLED TV doesn't have any burn-in yet, so I never needed to investigate further.

OLED TVs already compensate for burn in. A lot of your pixels are probably already somewhat "burnt" but you can't perceive it due to the corrective measures your TV takes. You'll only really notice it when it's irredeemably bad.

OLED TV's try to prevent burn in, I am not sure it can compensate burn in
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