Fig. 1. Single-pixel imaging system model

Fig. 2. Example of wavelet basis sampling at sixth scale for Lena image

Fig. 3. Flowchart of fast single-pixel imaging based on subsampling with sample reordering

Fig. 4. Simulation results of images with different sampling rates under the strategy (Beach). (a) Original image; (b) 10.0% sampling rate reconstructed image; (c) 25.0% sampling rate reconstructed image; (d) 62.5% sampling rate reconstructed image

Fig. 5. Strategy-positive order sampling PSNR difference (Beach)

Fig. 6. Strategy-positive order 24500 sampling reconstructed images (Beach). (a) Original image; (b) reconstructed image with 24500 samples under strategy; (c) reconstructed image with 24500 samples under positive order

Fig. 7. Comparison of details in strategy-positive order 24500 times sampling reconstructed images (Beach). (a) 24500 samples reconstructed detail image under strategy; (b) 24500 samples reconstructed detail image under positive order

Fig. 8. Simulation results of images with different sampling rates under the strategy (Lena). (a) Original image; (b) 10.0% sampling rate reconstructed image; (c) 25.0% sampling rate reconstructed image; (d) 62.5% sampling rate reconstructed image

Fig. 9. Strategy-positive order sampling PSNR difference (Lena)

Fig. 10. Strategy-positive order 35500 sampling reconstructed images (Lena). (a) Original image; (b) reconstructed image with 35500 samples under strategy; (c) reconstructed image with 35500 samples under positive order

Fig. 11. Comparison of details in strategy-positive order 35500 times sampling reconstructed images (Lena). (a) 35500 samples reconstructed detail image under strategy; (b) 35500 samples reconstructed detail image under positive order

Fig. 12. Strategy-positive order sampling PSNR difference with sampling radius halved (Lena)