Fig. 1. (a) Schematic of the experimental setup. L1–L3 are the optical lenses, and GG is the rotary ground glass. (b) Network architecture: U-Net. The U-Net consists of a characteristic extraction path (left side) and a characteristic matching path (right side) to introduce target characteristics into the light patterns.

Fig. 2. Intensity correlation distributions of the pseudothermal light under different training objects and training epochs. (a1)–(d1) Different training objects. (a2)–(d2) Intensity correlation distributions of the light field under the corresponding training objects. g⁽²⁾ of the trained speckle patterns with different (e) training epochs and (f) training objects, respectively.

Fig. 3. (a1) GI results under pseudothermal light (first column) and light sources with different training characteristics (second to fourth columns). (a1) The imaging object and (b1)–(d1) different training objects. (a2)–(d2) The simulation results. (a3)–(d3) The corresponding experimental results.

Fig. 4. Single- and multiple-target extraction results (500 measurements) in a complex scenario under a specific training target [the upper left parts of (a) and (b)]. (a1), (a3) and (b1), (b3) The results under pseudo-thermal light. (a2), (a4) and (b2), (b4) The results under the trained light. (a1), (a2) and (b1), (b2) Simulation results. (a3), (a4) and (b3), (b4) Experimental results.

Fig. 5. The experimental results under different imaging scenarios in a strong scattering environment (500 measurements). (a1)–(h1) The corresponding imaging objects and different training objects (the upper left part of each picture). The imaging results under pseudo-thermal light [(a2)–(c2)] and enhanced characteristic lights [(d2)–(h2)], respectively.

Fig. 6. Experimental results of fish bone extraction (500 measurements). (a1), (a2) X-ray photos of zebrafish and crucian carp bones. (b1), (b2) Real photos of zebrafish and crucian carp. (c1), (c2) Results using our imaging method.

Fig. 7. Experimental results of fish bone extraction (500 measurements). (a1)–(a3) Real photos of zebrafish and crucian carp with different thicknesses. (b1)–(f1), (b2)–(f2), and (b3)–(f3) The results from our method under different S/R values.