A modified carre algorithm for phase shifting interferometry

The idea is to develop a generalization of Carre that is not restricted to four images. Errors and random noise in the images cannot be eliminated, but the uncertainty due to its effects can be reduced by increasing the number of observations. The advantages of the proposed algorithm are its precision in the measures taken and immunity to noise in images. The objective is to get a method with high precision and accuracy in measurements, fast processing and low sensitivity to noise.