Abstract: Detecting 3D mask attacks to a face recognition system is challenging. Although genuine faces and 3D face masks show significantly different remote photoplethysmography (rPPG) signals, ...

Abstract: We demonstrate a versatile thin lensless camera with a designed phase-mask placed at sub-2 mm from an imaging CMOS sensor. Using wave optics and phase retrieval methods, we present a general ...

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Materials 3D-printable concrete alternative hardens in three days, not four weeks By Ben Coxworth November 25, 2025 According to the scientists, the new material "surpasses 17 megapascals, the ...