A Time of Flight sensor on a smartphone or tablet sends out pulses of light undetectable to the human eye. Usually an infrared light, the beams bounce off a subject and return to the device. With this data, a phone can calculate the precise distance it is away from the subject allowing it to improve AR capabilities and create better bokeh blurs for portraits. With the feature, 3D mapping can be used for a facial recognition systems.
Samsung’s inability to license a direct ToF sensor has led it to drop the feature on the Galaxy S21 (S30)
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