vcm

Mean

The script call is:

vcm.Mean(clip [ , int grid = 5][ ,float tol = 0.05])

clip: Input RGB, YUV, and Gray except Compat and half float formats.
grid: side of square grid. Odd number from 3 to 11 allowed.
tol: tolerance to accept grid central value as within Mean to replace with averaged value. Can be 0.01 to 1.0 . This is for protection of edges.