@ -28,7 +28,7 @@ class EynollahXmlWriter():
self.counter = EynollahIdCounter()
self.dir_out = dir_out
self.image_filename = image_filename
self.output_filename = os.path.join(self.dir_out, self.image_filename_stem) + ".xml"
self.output_filename = os.path.join(self.dir_out or "", self.image_filename_stem) + ".xml"
self.curved_line = curved_line
self.textline_light = textline_light
self.pcgts = pcgts