A Hybrid Variable-Resolution GI without Prior Information

Ghost imaging (GI) is a novel imaging technique which realizes the fluctuation of the target light field through pattern modulation and obtains the target information in a non-local area. Compared with traditional imaging, GI has the advantages of a simple structure, strong anti-interference ability and imaging resolution beyond the diffraction limit. Illumination patterns are very important for GI, and they are divided into uniform resolution patterns and variable-resolution patterns. The variable-resolution patterns have the characteristics of high resolution in the foveal region and low resolution in the edge region, which can quickly improve the imaging efficiency of the foveal region. But there are still mass mutations and the inability to adapt imaging. Therefore, we propose a hybrid non-resolution-pattern design method and a two-step projection strategy. Simulations and experiments show that the proposed two-step projection strategy can accurately establish the corresponding relationship between the foveal region and the region of interest. The hybrid variable-resolution pattern design method can solve the problem of mass mutation between the foveal region and the edge region of fixed foveal patterns.