Inception Score

[SkafteNicki]

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• Did you make sure to update the docs?
• Did you write any new necessary tests?

What does this PR do?

Adds Inception Score (IS) to the new image module
Also added corrected a bit about the FID metric

PR review

Anyone in the community is free to review the PR once the tests have passed.
If we didn't discuss your PR in Github issues there's a high chance it will not be merged.

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Make sure you had fun coding 🙃

[codecov]

Codecov Report

Merging #299 (1643af8) into master (1841cad) will increase coverage by 0.04%.
The diff coverage is 95.34%.

@@            Coverage Diff             @@
##           master     #299      +/-   ##
==========================================
+ Coverage   96.37%   96.42%   +0.04%     
==========================================
  Files          96       97       +1     
  Lines        3199     3241      +42     
==========================================
+ Hits         3083     3125      +42     
  Misses        116      116              

Flag	Coverage Δ
Linux	76.81% <30.23%> (-0.64%)	⬇️
Windows	76.81% <30.23%> (-0.64%)	⬇️
cpu	76.81% <30.23%> (-19.56%)	⬇️
gpu	96.39% <95.34%> (?)
macOS	76.81% <30.23%> (-19.56%)	⬇️
pytest	96.42% <95.34%> (+0.04%)	⬆️
python3.6	?
python3.8	?
python3.9	?
torch1.3.1	?
torch1.4.0	?
torch1.9.0	?

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

Impacted Files	Coverage Δ
torchmetrics/image/inception.py	94.87% <94.87%> (ø)
torchmetrics/__init__.py	100.00% <100.00%> (ø)
torchmetrics/image/__init__.py	100.00% <100.00%> (ø)
torchmetrics/image/fid.py	82.35% <100.00%> (+0.42%)	⬆️
torchmetrics/functional/regression/spearman.py	97.77% <0.00%> (+4.44%)	⬆️

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[pep8speaks]

Hello @SkafteNicki! Thanks for updating this PR.

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2021-06-17 22:53:32 UTC

[Borda]

@SkafteNicki seems they changed API in the newly release 0.3, renamed input_1 to input1 etc.
https://dev.azure.com/PytorchLightning/Metrics/_build/results?buildId=13410&view=logs&j=3afc50db-e620-5b81-6016-870a6976ad29&t=98354d77-e326-51ec-536f-1549451db1fa&l=7268

[SkafteNicki]

@Borda should have been fixed in commit 162d340

[Borda]

@Borda should have been fixed in commit 162d340

Ok, but would work for v0.2

[justusschock]

Some really minor comments. looks good to me