How to get maxima from an image pattern

How to get maxima of interference pattern from two images

[KALYAN ACHARJYA]

maxima of interference pattern??

Can you elaborate more?

[Ajay Kumar]

Can you try to be more specific?

some data(images) or detailed description of problem or already worked code helps.

[Aditya Pandey]

Means i have two images of interference patterns now i want to compare the phase shift in between them so for it i am thinking to find out difference in between there maxima that's why i am asking that how to get the central maxima from interference image??