Enhancement of spatial resolution of ghost imaging via localizing and thresholding

Wang Yunlong, Zhou Yingnan, Wang Shaoxiong, Wang Feiran, Liu Ruifeng^†, Gao Hong, Zhang Pei, Li Fuli^‡

The ghost imaging experimental results achieved with 5-spot illumination in each pattern. The FWHM of the light spots is 44.34 μ m . Panel (a) is the same as Fig. 4(a); (b) the same as Fig. 4(d); (c) the same as Fig. 4(g); (d) the corresponding cross-sectional images. The set is the same as Fig. 4(g). Here, the background is approximately eliminated with correlation formula Δ C ( ρ r ) = I t I r − I t I r .