a new dataset 2021 "SEED" 2nd Jiangsu Big Data Development and Application Competition (Hualu Cup)-Medical and Health Track

[Waterman0524]

This PR adds the following functionalities
1.Add a conversion program for medical segmentation dataset

[CLAassistant]

All committers have signed the CLA.

[MengzhangLI]

Hi, thanks for your nice PR and we would reply in detail ASAP.

By the way, do you have your result using MMSegmentation?

As far as I know, the size of hualu 2020 data is large thus GPU memory error often happened.

And we would better transform hualu data preparation into some dataset format like DRIVE, please check here.

Best,

[codecov]

Codecov Report

Merging #762 (0fd1a15) into master (c99bcd9) will decrease coverage by 0.03%.
The diff coverage is n/a.

❗ Current head 0fd1a15 differs from pull request most recent head b662b5e. Consider uploading reports for the commit b662b5e to get more accurate results

@@            Coverage Diff             @@
##           master     #762      +/-   ##
==========================================
- Coverage   85.37%   85.34%   -0.04%     
==========================================
  Files         107      107              
  Lines        5847     5847              
  Branches      960      960              
==========================================
- Hits         4992     4990       -2     
- Misses        673      674       +1     
- Partials      182      183       +1     

Flag	Coverage Δ
unittests	85.34% <ø> (-0.02%)	⬇️

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Impacted Files	Coverage Δ
mmseg/datasets/builder.py	86.84% <0.00%> (-2.64%)	⬇️

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