NOISE_SMOOTH

        NOISE_SMOOTH

    Smoothes  an  input  image  using the noise cheating enhancement method.
    This method works only for strictly positive images.  Values  for  adja-
    cent  pixels are summed until a given total is reached.  Then, the total
    is divided by the number of pixels added and the result is used for  the
    output pixel value.  This smoothing is very non linear (in particular no
    smoothing occur on pixels stronger than the smoothing threshold).  A pa-
    rameter allows to restrict the averaging to nearby pixels only:  in this
    case the output image is not necessarily strictly positive.