Lensless imaging by compressive sensing

In this paper, we propose a lensless compressive imaging architecture. The\narchitecture consists of two components, an aperture assembly and a sensor. No\nlens is used. The aperture assembly consists of a two dimensional array of\naperture elements. The transmittance of each aperture element is independently\ncontrollable. The sensor is a single detection element. A compressive sensing\nmatrix is implemented by adjusting the transmittance of the individual aperture\nelements according to the values of the sensing matrix. The proposed\narchitecture is simple and reliable because no lens is used. The architecture\ncan be used for capturing images of visible and other spectra such as infrared,\nor millimeter waves, in surveillance applications for detecting anomalies or\nextracting features such as speed of moving objects. Multiple sensors may be\nused with a single aperture assembly to capture multi-view images\nsimultaneously. A prototype was built by using a LCD panel and a photoelectric\nsensor for capturing images of visible spectrum.\n