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Or replace the 30-cent capacitor that's likely causing it.
It's likely one of the power bond wires from the glass screen to the silicon IC. Without equipment stretching into the millions of dollars, you won't be fixing that.
I need this for my Android phone to compensate for a burnt-in image.
Like I said in another comment: https://github.com/LibreShift/red-moon with a more complicated pattern than just a single color may be all you need for many use cases. I don't think Android has an easy to use global shader system, so you'll be stuck with overlay windows and the incompatibility they have with banking apps/DRM crapware that locks you out of your own screen without root access.
Gnome (Ubuntu, Linux) allows a custom shader to be applied to the whole desktop, including fullscreen apps. Here is an up to date fork with some example shaders: https://github.com/Hello1024/gse-shader I use it to make sure a 'sensitive' pixel on my screen never turns on (it's a row of pixels which, if the difference between it and the pixels to the side have more than a certain difference in brightness, the whole sc…
This is almost identical to a problem I'm trying to solve, which is to turn a potato-quality picture of a sheet of paper into a clean scan, turning whatever levels of gray conform the paper background become a uniform #ffffff white. The obvious solutions (equalizing, converting to bitmap, …) don't work because what's white in the top left (say #ccc) is wildly different from what's white in the bottom right (say #888)…
Sounds like local contrast adjustment. There are several different ways of solving it, here's a couple that look like they work pretty well: https://stackoverflow.com/questions/63251089/how-to-do-a-loc... https://stackoverflow.com/questions/65666507/local-contrast-... One possible preprocessing step could be to do a high pass filter on it, if the shadows vary slowly over the image. There are also more specialized tec…
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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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Like I said in another comment: https://github.com/LibreShift/red-moon with a more complicated pattern than just a single color may be all you need for many use cases. I don't think Android has an easy to use global shader system, so you'll be stuck with overlay windows and the incompatibility they have with banking apps/DRM crapware that locks you out of your own screen without root access.
What do you mean by incompatibility with banking apps? I am also interested in what it would take to do a global shader on Android.
Banking apps generally set a flag on their apps to prevent overlays and screenshots to prevent malware from reading the screen and tricking the user.
Depending on your phone, this can have two effects: either the overlay is disabled automatically or the banking app detects the overlay and blocks access (ie to the PIN keypad).
Not all banking apps do this, but the ones I've used do.