modify gray2psedu_color.py (#117)

* gray2color

pdseg/tools/gray2pseudo_color.py

@@ -61,7 +61,6 @@ def gray2pseudo_color(args):
                 try:
                     grt_path = osp.join(fpath, f)
                     _output_dir = fpath.replace(input, '')
-                    if _output_dir[0] == os.path.sep:
                     _output_dir = _output_dir.lstrip(os.path.sep)
 
                     im = Image.open(grt_path)