Remove imagemagick subprocess call

camelot.py

@@ -147,10 +147,8 @@ if __name__ == '__main__':
         print "using the lattice method"
         for g in glob_pdf:
             g_fname = os.path.basename(g)
+            print "working on", g_fname
             g_froot, __ = os.path.splitext(g)
-            print "converting %s to image" % g_fname
-            os.system(' '.join(['convert', '-density', '300',
-                               g, '-depth', '8', g_froot + '.png']))
             try:
                 data = lattice(g, f=args['--fill'], s=int(args['--scale']),
                                jtol=int(args['--jtol']), mtol=int(args['--mtol']),
@@ -174,6 +172,7 @@ if __name__ == '__main__':
         print "using the stream method"
         for g in glob_pdf:
             g_fname = os.path.basename(g)
+            print "working on", g_fname
             g_froot, __ = os.path.splitext(g)
             try:
                 data = stream(g, ncolumns=int(args['--ncols']), columns=args['--columns'],

lattice.py

@@ -2,6 +2,7 @@ import os
 import cv2
 import glob
 import numpy as np
+from wand.image import Image
 
 from table import Table
 from pdf import get_pdf_info
@@ -150,10 +151,10 @@ def lattice(filepath, f=None, s=15, jtol=2, mtol=2, invert=False, debug=None):
     """
     if debug:
         import matplotlib.pyplot as plt
-    filename = os.path.basename(filepath)
-    print "working on", filename
     fileroot, __ = os.path.splitext(filepath)
     imagename = fileroot + '.png'
+    with Image(filename=filepath, depth=8, resolution=300) as png:
+        png.save(filename=imagename)
     img = cv2.imread(imagename)
     img_x, img_y = img.shape[1], img.shape[0]
     text, pdf_x, pdf_y = get_pdf_info(filepath, method='lattice')

stream.py

@@ -70,7 +70,6 @@ def stream(filepath, ncolumns=0, columns=None, char_margin=2.0,
     output : list
     """
     filename = os.path.basename(filepath)
-    print "working on", filename
     text, __, __ = get_pdf_info(filepath, method='stream', char_margin=char_margin,
                                 line_margin=line_margin, word_margin=word_margin)
     text.sort(key=lambda x: (-x.y0, x.x0))