Convert a PDF to TIFF using Linux command line (FAX)

Question

I would like to convert PDF to TIFF for fax usage. I need to keep quality as much as possible but I want to have a small duration (as little grey as possible). I know Copia which does a wonderful job but I would like to have a Linux command line tool.

Do you know solutions (even non-free or non-opensource) which exists?

The basic image conversion tools everyone knows can do fax tiff but quality is poor and duration is high...

Thank you!

Answer 1

It slow down the process quite a bit but you can use supersamping to get better quality:

convert -density 288 input.pdf -resize 25% output.tif

From imagemagick forum.