A portable single-pixel camera based on coarse-to-fine coding light

Single-pixel imaging based on compressive sensing theory is a novel technique that emerged in the past decade. However, the majority of existing single-pixel cameras are too complex to realize out of laboratory. In this paper, we propose a portable compressive imaging camera platform consisting of a pocket projector and an optical power sensor. We use the projector to cast the flexible compressive sensing pattern generated by the computer program. In addition, this work introduces a quick coarse-to-fine model that can explore the object outline information and consequently reduce redundant computations in advance. Simulation and real experiments show that compared with existing techniques, the proposed platform and approach demonstrates higher recovery accuracy with less time consumption.