Computational Ghost Imaging with Multiplexed Time-Varying Signals

Abstract

This study proposes two methods of optical watermarking based on multiplexed time-varying signals for computational ghost imaging using the Hadamard matrices. The proposed methods can realize image fusion and dual optical encryption. The time-varying signal is encoded into a specific Hadamard coefficient in advance and hidden in the light source of the transmitting end as a multiplicative factor or loaded at the receiving end as an additive factor. Theory and experiments confirm the feasibility of this scheme. Moreover, the scheme is highly scalable and has potential applications in multispectral single-pixel imaging.

High-Visibility Pseudothermal Light Source Based on a Cr4+ : YAG Passively Q-Switched Single-Longitudinal-Mode Laser

“…[4] and again attracts people attention recently. e development of the airborne three-dimensional ghost imaging LiDAR imaging motional targets require high energy, high visibility and brightness, and high-stability pseudothermal light source to avoid the attenuation during the propagation, the influence from the background radiation, and the unstable air environment [10][11][12][13]. erefore, nanosecond laser pulse with high energy becomes an ideal choice.…”