Intelligent counting method of interference fringes

The invention discloses an intelligent counting method of interference fringes. The intelligent counting method comprises the following specific steps of: filtering random impulse noise from the data acquired by a linear array charge coupled device (CCD) sensor by adopting a self-adapting median diffusion filtering algorithm; reducing Gaussian noise by using a non-linear diffusion filtering algorithm; determining the reference range of effective data of the interference fringes, wherein the maximum gray value point Max, the minimum gray value point Min and the threshold value T are calculated, and the threshold value T refers to the point of which the gray value changes most in the determined reference range of the effective data; and performing second order derivation on a curve which is determined by an effective data range, and judging the changing state of the interference fringes according to second order derivative numerical value changes so as to realize automatic counting of the interference rings. By