Fig. 1. Principle of SDES.

Fig. 2. Sub-aperture (a) sampling and (b) stitching with coordinate error.

Fig. 3. Performance of SLCA.

Fig. 4. Edge images that are sampled at high magnification; (a) in-focus edge image; (b) estimated boundary line of a defocus edge image.

Fig. 5. Cropped edge images the focus curves; (a) cropped edge images that are sampled by the step length of 50 μm; (b) fitted focus curves of edge images.

Fig. 6. Spatial relation model of defocus depths and leveling mechanism.

Fig. 7. Sub-apertures (a) A11 and (b) A1i, collected for coordinate consistency error adjusting.

Fig. 8. Sub-aperture array stitching result, 3×3, after SLCA; (a) stitching before adjustment; (b) stitching after adjustment.

Fig. 9. Large-aperture stitching result; 320  mm×320  mm.