[Feature] Add merge_heatmap_to_5

[Yshuo-Li]

For DIC

[codecov]

Codecov Report

Merging #351 (cd61617) into master (0343375) will decrease coverage by 0.07%.
The diff coverage is 100.00%.

❗ Current head cd61617 differs from pull request most recent head 2dbe23c. Consider uploading reports for the commit 2dbe23c to get more accurate results

@@            Coverage Diff             @@
##           master     #351      +/-   ##
==========================================
- Coverage   80.25%   80.18%   -0.08%     
==========================================
  Files         182      181       -1     
  Lines        9662     9526     -136     
  Branches     1405     1388      -17     
==========================================
- Hits         7754     7638     -116     
+ Misses       1717     1698      -19     
+ Partials      191      190       -1     

Flag	Coverage Δ
unittests	80.15% <100.00%> (-0.08%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmedit/models/extractors/__init__.py	100.00% <100.00%> (ø)
mmedit/models/extractors/feedback_hour_glass.py	100.00% <100.00%> (ø)
mmedit/models/backbones/sr_backbones/dic_net.py
mmedit/apis/train.py	20.98% <0.00%> (+2.98%)	⬆️

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[innerlee]

Need rebase