Figures

Fig.1 Scheme for image processing analysis

Fig.2 Examples for the isolated point; dilation point and missing point (isolated point , dilation point , missing point )

Fig.3 Scheme for fringe thinning

Fig.4 Three processing steps for the thinning method

Fig.5 Some examples for the calculation of CN

Fig.6 The tree structure of the saving-deletion rule ( symbol meaning: Y means Yes, N means No, D means delete it, S means save it.)

Fig.7 some different cases of the 8-connected pixels

Fig.8 The set-up of our fringe stabilizer

Fig.9 (A) The hard copy printed photographs corresponding to the fringes in Mach-Zehnder set-up. (B). Thinning fringe obtained by our new image processing algorithm.

Fig.10 (A) The hard copy printed photographs of the caustics in crack tip. (B). Thinning fringe obtained by our new image processing algorithm.

Fig.11 (A) The hard copy printed photographs corresponding to the surface of the HOE. (B). Thinning fringe obtained by our new image processing algorithm.