Fix pdftopng usage

Delete cache

camelot/parsers/base.py

@@ -17,3 +17,4 @@ class BaseParser(object):
         self.vertical_text = get_text_objects(self.layout, ltype="vertical_text")
         self.pdf_width, self.pdf_height = self.dimensions
         self.rootname, __ = os.path.splitext(self.filename)
+        self.imagename = "".join([self.rootname, ".png"])

camelot/parsers/lattice.py

@@ -210,8 +210,7 @@ class Lattice(BaseParser):
     def _generate_image(self):
         from pdftopng import pdftopng
 
-        self.imagename = "".join([self.rootname, ".png"])
-        pdftopng.convert(pdf_path=self.filename, png_path=self.rootname)
+        pdftopng.convert(pdf_path=self.filename, png_path=self.imagename)
 
     def _generate_table_bbox(self):
         def scale_areas(areas):