Extracting images from PDF and removing whitespace.

Two tools you need

1. ImageMagick (convert) - http://www.imagemagick.org/script/binary-releases.php
2. pdfimages - http://en.wikipedia.org/wiki/Pdfimages

Here the order:

  570  pdfimages ../../20120101.pdf 20120101
  571  convert *.ppm -fuzz 7% -trim ../20120101-%d.jpg