pdf2png

pdf2png.py

#!/usr/bin/env python
"""Convert PDF to PNG with convert program
"""
import sys
import subprocess
import getopt

# add -trim to avoid extra borders
convert = "convert -trim -antialias -alpha on -channel rgba -fuzz 5%"
density = 300
quality = 90
transparent = None

def show_usage():
    print """pdf2png [options] pdffile pdffile2 ...
Convert PDF to PNG
options:
   -h --help          show this help
   -d --density=      set density (dpi) (default 600)
   -q --quality=      set quality percentage (default 90)
   -t --transparent=  set color to make transparent (eg, 'white', default None)

This runs the convert script from ImageMagick:
 convert -antialias -alpha on -channel rgba -fuzz 5% -quality 90 -density 600  pdffile PNG32:pngfile
"""
    sys.exit()

opts, args = getopt.getopt(sys.argv[1:], "hd:q:t:", ["help",
                                                     "density=",
                                                     "quality=",
                                                     "transparent="])

for key, val in opts:
    if key in ("-h", "--help"):
        show_usage()
    if key in ("-d", "--debug"):
        density = int(val)
    if key in ("-q", "--quality"):
        quality = int(val)
    if key in ("-t", "--transparent"):
        transparent = val

convert = "%s -density %i -quality %i" % (convert, density, quality)
if transparent is not None:
    convert = "%s -transparent %s" % (convert, transparent)


for fname in args:
    if fname.endswith('.pdf'):
        fname = fname[:-4]
    elif fname.endswith('.'):
        fname = fname[:-1]

    command = "%s %s.pdf PNG32:%s.png" % (convert, fname, fname)
    result = subprocess.call(command, shell=True)
    if result:
        print 'Conversion failed for %s.pdf' % fname
    else:
        print 'Wrote %s.png' % fname

For mac,
brew install imagemagick