Unlike least-square and minimum cost flow algorithm are the minimum L~P-norm solutions of the difference between the wrapped phase gradient and the true phase gradient, the algorithm uses a cost function based on second-order differences, which is solved by simulated annealing.

Image manipulation, unwrapping of wrapped phase, calculation speed and precision are still the mainstream study direction due to amounts of speckle noise.

A new phase unwrapping algorithm with Zernike Polynomials to fit the data into a continuum wave is presented.

Using the method of stripe casting,phase unwrapping is a difficulty in the practical measurement because of the original shortcoming that caused shadow,background and discontinuous field mixed in the useful information.

Phase extracting algorithm and phase unwrapping algorithm of interferogram processing based on phase shift interfering profilometry are discussed.

Implement of phase unwrapping of digital holographic reconstruction image by discrete cosine transform least square method;

In order to solve the problem that ordinary phase unwrapping methods are not competent in the measurement of surfaces with complicated profile or/and nonideal data areas, a breadth-first search phase unwrapping algorithm based on template is presented.

In order to simply obtain the phase of a surface in phase measuring profilometry(PMP),a fully automatic phase unwrapping method based on projected double spatial frequency fringes has been deduced.

Application research of Fourier-transform-based deterministic phase-unwrapping algorithm;

A novel phase unwrapping algorithm, based on intensity modulation analysis and adaptive threshold is presented.

The pretreatment of the collected image, analysis in various phase-shifting algorithms and phase-unwrapping algorithms were realized.