add LPIPS

[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?

Fixes #427
Adds LPIPS metric to image package. Use to measure perceptual similarity.

PR review

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If we didn't discuss your PR in Github issues there's a high chance it will not be merged.

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[codecov]

Codecov Report

Merging #431 (f2804d5) into master (00f0256) will decrease coverage by 0.11%.
The diff coverage is 91.66%.

@@            Coverage Diff             @@
##           master     #431      +/-   ##
==========================================
- Coverage   95.97%   95.85%   -0.12%     
==========================================
  Files         129      130       +1     
  Lines        4227     4274      +47     
==========================================
+ Hits         4057     4097      +40     
- Misses        170      177       +7     

Flag	Coverage Δ
Linux	75.03% <83.33%> (+0.08%)	⬆️
Windows	75.03% <83.33%> (+0.08%)	⬆️
cpu	75.03% <83.33%> (-20.92%)	⬇️
gpu	95.85% <91.66%> (-0.05%)	⬇️
macOS	75.03% <83.33%> (-20.92%)	⬇️
pytest	95.85% <91.66%> (-0.12%)	⬇️
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/lpip_similarity.py	91.11% <91.11%> (ø)
torchmetrics/__init__.py	100.00% <100.00%> (ø)
torchmetrics/image/__init__.py	100.00% <100.00%> (ø)
torchmetrics/utilities/imports.py	83.33% <100.00%> (+0.40%)	⬆️
torchmetrics/average.py	84.61% <0.00%> (-11.54%)	⬇️

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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 2021-08-09 11:30:34 UTC