Level 2 Help for REMNOISE

1. Input image (required).
2. Standard deviation image (optional).

output image with noise removed.

Fixed noise threshold term TOL.
Pixels are changed if their dn values differ from the interpolated model
by over TOL+FACTOR*A where A is the activity measure.

The scale factor used to compute a positionally dependent noise threshold. 
Pixels are changed if their dn values differ from the interpolated model
by over TOL+FACTOR*A where A is the activity measure.