Fig. 1. Basic structure diagram of a focused light field imaging system including a microlens array

Fig. 2. Schematic of sub-aperture image and macro pixel

Fig. 3. Image encryption process

Fig. 4. Original images

Fig. 5. Encrypted image

Fig. 6. Decrypted image

Fig. 7. Horizontal pixel adjacent pixel correlation of original images after stitching

Fig. 8. Horizontal pixel adjacent pixel correlation of encrypted images

Fig. 9. Key sensitivity test of the algorithm

Fig. 10. Decrypted images with noise attack

Fig. 11. Original image in algorithm comparison experiment

Fig. 12. Encrypted images using two algorithms