[Feature request]: Allow configuring capture sensitivity

[hugochinchilla]

Please describe your feature request

I'm using wluma to adjust screen brightness based only on screen contents.

[als.none]

[[output.backlight]]
name = "eDP-1"
path = "/sys/class/backlight/amdgpu_bl1"
capturer = "wayland"

I find it's overreacting a bit, for example just by scrolling around the issues on this repo it's adjusting the brightness constantly. For me the amount of light emitted by the screen while scrolling on a issue page is imperceptible (just different shades of gray moving along the screen but the total light is almost the same all the time), however having wluma react to it adjusting the backlight is very perceptible and distracting.

I think a threshold parameter for how much variation on perceived brightness between screen captures before wluma reacts to it can solve the issue.

Thanks for this app, is a life saver for switching between terminals and web content at night.

[max-baz]

Thanks for opening the issue!

Could you have a look at the contents of ~/.local/share/wluma/eDP-1.yaml? This is the training data that wluma has built so far. In there, luma is the screen lightness in the range of 0-100, and brightness is what it will apply. You can also see the currently detected luma values if you run with RUST_LOG=trace.

What you describe sounds like there is training data bordering each other with very different desired brightness levels, e.g. for 13% of luma it wants 30% of brightness and for 14% of luma it wants 50% of brightness, thus you scrolling on a webpage and jumping back and forth between 13%/14% causes dramatic shift in desired brightness levels.

Usually I'd expect this to go away if you just continue training it, but you could also try to modify the file yourself :)

[hugochinchilla]

thanks, I deleted the file and retrained wluma, the flickering is gone now