i scaned a coulor picture with gimp and saved it in a gif-format. after
that i load it in xfig to add some arrows and such stuff and write it as
an eps-file. now i see that the edges of the picture are not so sharp as
i expect. if i save the same one as postscript and after work with xfig
as eps
most probably a problem of both gif and the tools you used.
Yes, I agree the tools were a poor choice. Since this doesn't
solve your problem, just points out a new one, I'll try and be
helpfull by suggesting a new set of tools. If all you want to
do is add arrows, you can do that from the gimp