Fig. 1. Experimental setup of the liquid crystal lens visual imaging system

Fig. 2. Illustration of salient noises and image edges. (a) Im; (b) Ie1; (c) In; (d) Ie

Fig. 3. Results of PFI denoising. (a) Before PFI denoising; (b) after PFI denoising

Fig. 4. Structure of liquid crystal lens

Fig. 5. fMT50 changing with U2

Fig. 6. Captured images and illustration of PFI. (a) ISO12233 chart; (b) slanted bar images of Ir,If, I's(α=0.6); (c) wedge pattern images of Ir,If,I's(α=0.6)

Fig. 7. fMT50 changing with different α for Ir,If,I's

Fig. 8. Standard deviation of image noise with different α

Fig. 9. Illustration of PFI. (a) Is(α=0.6) without PFI; (b) I's(α=0.6) with PFI