[Feature] Show edge score for openset kie

[cuhk-hbsun]

No description provided.

[codecov]

Codecov Report

Merging #677 (6d98b97) into main (af9a625) will decrease coverage by 0.06%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #677      +/-   ##
==========================================
- Coverage   85.51%   85.44%   -0.07%     
==========================================
  Files         163      163              
  Lines       10477    10485       +8     
  Branches     1571     1572       +1     
==========================================
  Hits         8959     8959              
- Misses       1173     1181       +8     
  Partials      345      345              

Flag	Coverage Δ
unittests	85.44% <0.00%> (-0.07%)	⬇️

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Impacted Files	Coverage Δ
mmocr/core/visualize.py	69.55% <0.00%> (-1.41%)	⬇️

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