pdf2png
=======
This guy [1] made a nice Bash script for conversion of PDF files to a sets of
PNGs. Of course GhostScript [2] and ImageMagick [3] have to be available.
Why I haven't found it earlier?
References:
[1] http://bruxy.regnet.cz/web/linux/EN/pdf2png/
[2] https://www.ghostscript.com
[3] http://www.imagemagick.org