Fig. 1. Schematic diagrams of sector-shaped opaque obstacle (black sectors are opaque obstacles). (a) Beam spot without passing through obstacles; (b) location of obstacles; (c) beam spots after interaction with obstacles

Fig. 2. Interference patterns of POVB with different TC after MI obtained by theoretical simulation (l represents TC value). (a) Ide; (b) N-Ide

Fig. 3. Network structure of experiment

Fig. 4. Schematic diagrams of experiment. (a) Schematic diagram of multi-aperture plate under angular obstacles (transmittance function of multi-aperture plate is realized by CGH); (b) schematic diagram of experimental setup

Fig. 5. Experimental results of spots of POVB before and after MI. (a) Patterns of POVB and POVB+MI with l=0, 1, …, 9 under ideal environment; (b) patterns of POVB+MI with l=8.01, 8.02, …, 8.10 under ideal environment

Fig. 6. Training results and confusion matrix of 0.01 order fractional POVB+MI. (a) Training results of 0.01 order fractional POVB+MI under ideal environment; (b) confusion matrix of fractional POVB+MI

Fig. 7. Experimental patterns of 0.01 order fractional POVB before and after MI under non-ideal environment (90° and 180° represent degrees of sector-shaped opaque obstacle under non-ideal environment)

Fig. 8. Training results and confusion matrices of POVB+MI under sector-shaped opaque obstacle with 90° and 180°. Training results of POVB+MI with (a) 90° and (c) 180° sector-shaped opaque obstacle, respectively; confusion matrices with (b) 90° and (d) 180° sector-shaped opaque obstacle, respectively