Phase Unwrapping Algorithm Based on the Oriented Parameter Map

The key of this algorithm is that a parameter or group of parameters are selected to identify reliability of the phase data or the direction of phase unwrapping.The path of phase unwrapping is oriented according to the parameter map.Demonstration experiments include phase measuring profilometry(PMP),Fourier thansform profilometry(FTP) and phase shifting holographic interferometry.The experimental results show that this algorithm is reasonable and effective.The advantage of this approach is that the path of phase unwrapping is always along the direction from the pixel with higher parameter value to the pixel with low parameter value.Therefore,in the worse case the error is limited,if there is any,to local minimum areas.