dux
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meh
Ambient light based adaptive brightness mode?
It'd be nice to have a mode to adjust the brightness based on a light sensor (which some devices have) or webcam (which many devices have), a la yawls or calise.
I was thinking about it, the problem is I don't have a webcam nor a light sensors :panda_face:
Well, I do have a webcam in my laptop (and technically also a light sensor on my phone, though I don't have a setup to cross-compile Rust for Android) — I just have too many projects on a very small plate right now. If you start a framework for the feature, though, I will happily bug-test and contribute to getting it working!
Yeah, I'm definitely going to add the webcam one.
I did some research and interacting with the light sensors seems to be hell on earth with inconsistent sysfs interfaces between different drivers, so I'll scrap that for now.
But webcam is coming!
I have an ALS accessible via /sys/bus/iio and already wrote software to read the sensor value and adjust the backlight via /sys but will now go and try to add that implementation to dux.
Excellent work btw. Brandon
On Aug 12, 2016 5:18 PM, "meh." [email protected] wrote:
Yeah, I'm definitely going to add the webcam one.
I did some research and interacting with the light sensors seems to be hell on earth with inconsistent sysfs interfaces between different drivers, so I'll scrap that for now.
But webcam is coming!
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@brandonedens nice, if you have any questions about the code don't hesitate to ask.
So I had a bit of free time and sanity to revisit this, and found the rscam crate. It looks like it should be pretty easy to just grab a single camera frame and run the same code that dux already has to extract luminance and adapt the brightness — which means I'm probably missing some horrible blocker on this one.
@Celti I think the algorithm used would be different to have decent enough results.
I wrote this whole big response to that and then I realised I'm an idiot when an actual thought came into my brain: Why not let the camera do the work? Each camera knows best what exactly its capturing in terms of light, after all — and I don't think I've seen a webcam made in the past fifteen years that didn't support capturing in YUV format. The Y channel being luminance data, can we just extract and average that?
@Celti my doubt is mostly whether or not averaging the luminance of what the camera is seeing would map correctly or well to the luminance the person perceives around them.
