Fig. 1. Algorithm flow chart

Fig. 2. Reflective off-axis digital holography experimental system. (a) Experimental light path diagram; (b) digital holography setup

Fig. 3. Holograms and reproduced phase distributions of each sub-aperture. (a)--(d) Holograms of each sub-aperture; (e)--(h) reproduced phase distributions of each sub-aperture

Fig. 4. Phase distributions of sub-aperture of longitudinal splicing. (a) Upper half phase distribution; (b) lower half phase distribution

Fig. 5. Corner detection and filtering in overlapping area of longitudinal splicing. (a)(b) Overlapping region of sub-aperture phase diagram; (c)(d) Harris corner detection in overlapping region; (e)(f) Harris corner filtering

Fig. 6. Registration of feature points of longitudinal splicing. (a) Feature point registration map of NCC algorithm; (b) result chart of mismatch point pair elimination; (c) best match point pair

Fig. 7. Comparison of the results of each phase stitching algorithms. (a)(f) Harris; (b)(g) SIFT; (c)(h) Susan; (d)(i) FS; (e)(j) proposed algorithm

Fig. 8. Section curve map

Fig. 9. Image measured by image measuring instrument

Fig. 10. Prewitt operator edge detection image contour. (a) Harris; (b) SIFT; (c) Susan; (d) FS; (e) proposed algorithm; (f) image map