Fig. 1. Image acquired by imaging system based on microlens array. (a) Light field data; (b) local magnification

Fig. 2. Relationship between view angle and projection point

Fig. 3. Views formed by periodically extracted pixel units

Fig. 4. Relationship between view point and projection point

Fig. 5. Relationship between synthetic view point and projection area

Fig. 6. Flowchart of nonperiodic algorithm

Fig. 7. Views extracted by two algorithms. (a) View of periodic algorithm; (b) view of nonperiodic algorithm; (c)(d) binarization results of Fig. 7(a) and Fig. 7(b); (e)(f) outline extraction results of Fig. 7(a) and Fig. 7(b); (g)(h) local magnification of Fig. 7(a) and Fig. 7(b)

Fig. 8. Views formed by pixel blocks extracted by nonperiodic algorithm. (a)-(c) Sizes of pixel blocks are 1×1, 2×2, and 3×3; (d)-(i) local magnification of corresponding views

Fig. 9. High resolution views obtained by two algorithms. (a) View of bicubic interpolation algorithm; (b) view of nonperiodic algorithm; (c)-(f) local magnification of corresponding views

Fig. 10. Histogram for image quality comparison