diff --git a/pdseg/tools/gray2pseudo_color.py b/pdseg/tools/gray2pseudo_color.py
index 6128f3776138956757577fe9a415d21aadc57c62..3627db0b216175b04a50d9012999d441f4df69fb 100644
--- a/pdseg/tools/gray2pseudo_color.py
+++ b/pdseg/tools/gray2pseudo_color.py
@@ -61,8 +61,7 @@ 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)
+                    _output_dir = _output_dir.lstrip(os.path.sep)
 
                     im = Image.open(grt_path)
                     lbl = np.asarray(im)