Name
       3color - 3 color combination

Synopsis
       3color <red> <green> <blue> <outname>

Description
       3color  combines three FITS images of equal size to a sin-
       gle 24 bit image in PPM format. All input files are  first
       scaled to 256 gray levels before conversion to a single 24
       bit image file.

       Example:
       > 3color h2.fits feII.fits brg.fits orion.ppm

Options
       None

Files
       Input files shall all comply with FITS format. The  output
       file  is  in PPM (Portable PixMap) format, which should be
       fairly easy to convert to  any  kind  of  more  convenient
       image  format for export. As PPM images are portable, they
       are bulky and usually not suitable for export.