One of the Samsung Galaxy S6's new camera feature is to use its IR-based heart-rate sensor to aid in white balancing. Some of the write-ups on tech websites briefly mention how the IR sensor can 'detect the light around' or 'if a photo is being taken outdoors or indoors' for this feature to work. Are there more scientific explanations to how this works, or will we have to wait for actual reviews to be out?
The general photography angle to this is: are existing cameras DSLRs using a similar method to figure out white balance too?
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