[magick-users] Antialiased PDF rasterization

[duc.sequere.aut.de.via.decede at imagemagick.org]

The solution to readable PDF to PNM conversion is supersampling as
you suggested.  We typically use this command:

  convert -density 400 -colorspace rgb ENR_L17.pdf -resize 25% ENR_L17.ppm

In regards to speed, sometimes its as simple as having a modern processor
with plenty of memory.  We got a complaint recently about a process taking
20 minutes under Windows.  We downloaded the image and the command and it
ran in 9 seconds on our 3.0GHZ processor with 8GB of memory under Linux 64-bit.
If that's not an option your most promising speed up would be to use
Ghostscript from the command line.  Use supersampling and then use a
netpbm command to reduce to the final size.