The quantitative evaluation of interference patterns consists of the two steps of determining the interference phase at the points of interest and of combining the phase data with the geometry data. For each of these steps global and local or pointwise methods are presented and compared. Although the methods are applicable to the diverse types of interference patterns, they are presented here for the typical case of holographic interference patterns.
Thomas M. Kreis, Thomas M. Kreis,
"Quantitative Evaluation Of Interference Patterns", Proc. SPIE 0863, Industrial Optoelectronic Measurement Systems Using Coherent Light, (1 June 1988); doi: 10.1117/12.943488; https://doi.org/10.1117/12.943488