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3 dayslibtuning: Add module for lux calibrationStefan Klug
For the lux algorithm, reference values get calculated based on a tuning image taken at a known lux level. The reference data contains the mean Y of the image, lux level, exposure time, gain and aperture. This module calculates these values for insertion into the tuning file. Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>