Add pdf2image backend

camelot/backends/image_conversion.py

@@ -2,8 +2,9 @@
 
 from .poppler_backend import PopplerBackend
 from .ghostscript_backend import GhostscriptBackend
+from .pdf2image_backend import PDF2ImageBackend
 
-BACKENDS = {"poppler": PopplerBackend, "ghostscript": GhostscriptBackend}
+BACKENDS = {"pdf2image": PDF2ImageBackend, "poppler": PopplerBackend, "ghostscript": GhostscriptBackend}
 
 
 class ImageConversionBackend(object):

camelot/backends/pdf2image_backend.py

@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+
+import os
+import shutil
+import subprocess
+from pdf2image import convert_from_path
+
+class PDF2ImageBackend(object):
+    def convert(self, pdf_path, png_path):
+
+        try:
+            output_folder = os.path.dirname(png_path)
+            output_file = os.path.splitext(os.path.basename(png_path))[0]
+            paths = convert_from_path(pdf_path, output_folder=output_folder, output_file=output_file, dpi=300, fmt='png',
+                          single_file=True, use_pdftocairo=True, paths_only=True)
+        except subprocess.CalledProcessError as e:
+            raise ValueError(e.output)

setup.py

@@ -14,7 +14,6 @@
 
 
 requires = [
-    "chardet>=3.0.4",
     "click>=6.7",
     "numpy>=1.13.3",
     "openpyxl>=2.5.8",
@@ -24,7 +23,7 @@
     "tabulate>=0.8.9",
 ]
 
-base_requires = ["ghostscript>=0.7", "opencv-python>=3.4.2.17", "pdftopng>=0.2.3"]
+base_requires = ["opencv-python>=3.4.2.17", "pdftopng>=0.2.3"]
 
 plot_requires = [
     "matplotlib>=2.2.3",