vlt.image.writetif

  WRITETIF - write a TIF file after scaling and converting to integer

  WRITETIF(A, FILENAME, CMAP, SCALEFROM, SCALETO, BIT)

  Write an 8-bit or 16-bit tiff of the image A to FILENAME, using
  colormap CMAP. The image is scaled (from a min of SCALEFROM(1) and a max
  of SCALEFROM(2) to a new min of SCALETO(1) and a new max of SCALETO(2)).
  If SCALEFROM is empty, it is assumed to be the min and max of the data
  of A. If SCALETO is empty, then the range is [0 2^(BIT)-1]

  FILENAME should end in '.tif' or '.tiff'.

  BIT should be 8 or 16, depending upon whether 8- or 16-bit output is desired.