[1] Liu J F, Li Y Q, Liu K. Weighted least-square phase unwrapping algorithm for noisy phase-map[J]. Optical Technique, 34, 643-646, 650(2008).

[2] Guo Y, Chen X T. Study of improved phase unwrapping algorithm based on least squares[J]. Chinese Journal of Lasers, 41, 0508005(2014).

[3] Su X Y, Xue L. Phase unwrapping algorithm based on fringe frequency analysis in Fourier-transform profilometry[J]. Optical Engineering, 40, 637-643(2001).

[4] Wu L S, Ren D, Wu K. New region-growing algorithm for phase unwrapping[J]. Chinese Journal of Mechanical Engineering, 38, 126-130(2002).

[5] Qian X F, Rao F, Li X H et al. Accurate least-squares phase unwrapping algorithm[J]. Chinese Journal of Lasers, 39, 0209001(2012).

[6] Zhang S, van der Weide D, Oliver J. Superfast phase-shifting method for 3-D shape measurement[J]. Optics Express, 18, 9684-9689(2010).

[7] Liu W. Research of phase unwrapping algorithm and its application in phase measurement profilometry[D]. Taiyuan: North University of China, 19-25(2016).