This zsh works most of the time: then print the PDF. I say "most of the time" as sometimes the image gets cut in the edges - I don't know why.
jpeg2pdf () { local pic=$1 local pdf=${pic:r}.pdf gs -sDEVICE=pdfwrite \ -sPAPERSIZE=a4 \ -o $pdf viewjpeg.ps \ -c "($pic) viewJPEG showpage" } -- underground experts united http://user.it.uu.se/~embe8573