Merge pull request #3523 from WenmuZhou/require

update opencv version for py3.9

requirements.txt

@@ -7,4 +7,4 @@ tqdm
 numpy
 visualdl
 python-Levenshtein
-opencv-contrib-python==4.2.0.32
\ No newline at end of file
+opencv-contrib-python==4.4.0.46
\ No newline at end of file