Input image(s) in byte or 16-bit integer (halfword) data format. Maximum line length is 65536 samples for byte inputs and 32768 samples for halfword inputs.
IBIS-2 output histogram file(s) with statistics.
To allow more than one HISTOGRAM in a single IBIS file, this parameter allows the definition of an INSTANCE name, by which each set may be referenced.
The possible values are none, iof and radiance. For IOF, the output histogram scale will be IOF times some convenient scale factor. For RADIANCE, it will be nanowatts/cm**2/steradian/nanometer times some convenient scale. The input image must be a radiometrically corrected Voyager or Galileo image.
The optional keyword 'USECOW causes the histogram computation to be restricted to the cutout window area (Galileo).