A thin lensless camera free of noise

Scientists from Tsinghua University in China and MIT in the US report that applying a compressive sensing algorithm can significantly improve the quality of lensless imaging. Their thin lensless camera consists of a Fresnel optical element placed three millimeters in front of a CMOS image sensor. The signal recorded by the CMOS sensor is then reconstructed by the advanced algorithm to generate an improved image of the object free of noise.