Show HN: Clight, small C linux user daemon to turn webcam into light sensor
1–6 of 6 posts
Re: Show HN: Clight, small C linux user daemon to turn webcam into light sensor
#2I am glad to present you all my latest project: clight.
Clight will set your screen backlight level by capturing frames from webcam and computing ambient brightness; it can manage your screen gamma temperature too. It uses geoclue2 to retrieve user location, and will compute sunrise/sunset times to set gamma.
It depends on a Bus interface i developed together with it, Clightd. Clightd is responsible of setting/getting screen brightness, capture frames from webcam and returning their average brightness, and setting/getting gamma. As it uses libudev to get/set backlight/get video device, it is much less prone to mistakes than "fopen/fscanf/fprintf", and safer.
Both softwares are distributed with a GPL license.
For more informations, please refer to both projects READMEs. I hope someone will find them interesting and useful!
Re: Show HN: Clight, small C linux user daemon to turn webcam into light sensor
#3I am glad to present you all my latest project: clight. Clight will set your screen backlight level by capturing frames from webcam and computing ambient brightness; it can manage your screen gamma temperature too. It uses geoclue2 to retrieve user location, and will compute sunrise/sunset times to set gamma. It depends on a Bus interface i developed together with it, Clightd. Clightd is responsible of setting/gettin…
Neat project! I might just start using this.
One thing - does clight support ICC color profiles? My screen is harshly blue without the correct profile applied. Redshift normally simply overrides your profile; it recently added support for a "preserve" option, which applies the desired color temperature as a function of the current profile, but unfortunately this makes the transform relative, and also not symmetrical. Turning the temp down by 1000K and then up by 1000K causes a loss in brightness.
Re: Show HN: Clight, small C linux user daemon to turn webcam into light sensor
#4I am glad to present you all my latest project: clight. Clight will set your screen backlight level by capturing frames from webcam and computing ambient brightness; it can manage your screen gamma temperature too. It uses geoclue2 to retrieve user location, and will compute sunrise/sunset times to set gamma. It depends on a Bus interface i developed together with it, Clightd. Clightd is responsible of setting/gettin…
Neat project! I might just start using this. One thing - does clight support ICC color profiles? My screen is harshly blue without the correct profile applied. Redshift normally simply overrides your profile; it recently added support for a "preserve" option, which applies the desired color temperature as a function of the current profile, but unfortunately this makes the transform relative, and also not symmetrical.…
It does not, i'm sorry.
Let me know if it feels better with clight compared to redshift though; may be different algorithms lead to different (hopefully better) results!
Re: Show HN: Clight, small C linux user daemon to turn webcam into light sensor
#5This is a beautiful thing.
Re: Show HN: Clight, small C linux user daemon to turn webcam into light sensor
#6This is a beautiful thing.
I hope someone noticed the "see light" pun!