Fig. 1. Phase difference image of electronic speckle pattern shearing interferometry

Fig. 2. Principle of residues preprocessing. (a)(c) Criterion for moving residues; (b)(d) result of residues preprocessing

Fig. 3. Residues and minimum cost path network before and after preprocessing for a filter image. (a) Filter image; (b) before preprocessing; (c) after preprocessing

Fig. 4. Simulated phase diagram. (a) Without noise; (b) with noise

Fig. 5. Filter result. (a) Filter image; (b) cost image

Fig. 6. Butterworth filter image and unwrapped phase image. (a) Filter image; (b) unwrapped phase image

Fig. 7. Influence of residues preprocessing parameters on MCF phase unwrapping accuracy

Fig. 8. Influence of number of residues on unwrapping time

Fig. 9. Influence of the residues preprocessing on the MCF unwrapped phase of measured phase difference images. (a)(b) Measured phase difference images and corresponding filter images; (c)(d) MCF unwrapped phase images without and with preprocessing