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Show HN: Clight, small C linux user daemon to turn webcam into light sensor
- nierro 9y agoI 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!
- dTal 9y agoNeat 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.
- nierro 9y agoIt 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!
- artisdom 9y agoThis is a beautiful thing.
- nierro 9y agoI hope someone noticed the "see light" pun!