Yes ds9 does it very nicely (with proper color scaling), but unfortunately not in batch mode. This is also true for xv. "> The latest ds9-2.2 allows to save (FITS) images as jpeg, tiff, png, or ppm > (File->Save as->Image...) to disk (this needs gs>=6.5 in the PATH). From > there one can go to gif with e.g. xv.