fried_filter

FTR.ftr.fried_filter(shape)[source]

The fried filter is for a system geometry where the slope measruement points are taken to be the difference between two adjacent points. As such, the slopes are reconstructed to be the phase points 1/2 a subaperture away from the measured point.

In this scheme, the slope measruement in the center of four phase measurement points is taken (in the x-direction) to be the average of the x slope between the top measruements and the x slope between the bottom measurement.