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I’m a portrait expert, here’s how I avoid the red-eye effect ruining my photos
but on-camera (or pop-up) flash has a tendency to cause the red-eye effect. This is caused when the light from the flash reflects off the blood in the vessels at the back of the eye, straight back ...
Business Insider India2y
Smartphone's camera, flash can measure blood oxygen up to 70% at home
"The camera records how much that blood absorbs the light from the flash in each of the three colour channels it measures: red, green and blue," said senior author Edward Wang, assistant professor ...