Embedding and transmitting multi-dimensional optical information through noisy environments using a single-pixel detector

Abstract

Fourier single-pixel imaging (FSPI) technique can encode a real two-dimensional scene to one-dimensional time-varying light intensity sequences traveling in the free space. In this work, FSPI technique with weighted light source is regarded as a carrier of multi-dimensional information while capturing the object scene using a lens-free photodetector, and can carry visible and invisible optical information simultaneously utilizing a novel spectrum division multiplexing technique. A wavelength division multiplexing technique is adopted to improve the channel capacity as well, in which a total of six watermarks are embedded once. More importantly, our scheme successfully demonstrates that triple information (host scene, visible, and invisible optical information) can be transmitted and retrieved with high fidelity in four noisy environments including external attack, environmental interference light, thick and dynamic scattering.