A group of academic researchers has devised a technique to extract sounds from still images captured using smartphone cameras with rolling shutter and movable lens structures. The movement of camera hardware, such as the Complementary Metal-oxide–Semiconductor (CMOS) rolling shutters and the moving lenses used for Optical Image Stabilization (OIS) and Auto Focus (AF), create sounds that are modulated into images as imperceptible distortions.[1]
These types of smartphone cameras, the researchers
