Choice of an estimation area

The results depend on the image on which we estimate the parameters.
Therefore they depend on the area from which this image is extracted :
Values of  estimated on 64x64 areas extracted from "Nîmes", with =2
Estimation on the entire image gives =0.19.
On this original image are represented :
in red, insufficiently regularized areas (too much noise)
in blue, oversmoothed areas (not enough details)
If we only use one couple  for the entire image,
        we must choose a representative area of this  image.
André Jalobeanu - 24 Aug 1998