Fix Exceptions for DSS, GMSD, Haarpsi, MS-SSIM, Perceptual, SRSIM, SSIM, VIF

[denproc]

Closes #304

Proposed Changes

• Changed ValueError to AssertionError for DSS, GMSD, Haarpsi, MS-SSIM, Perceptual, SRSIM, SSIM, VIF
• Changed comments for Exception in accordance with validation in case of DSS

[codecov[bot]]

Codecov Report

Merging #305 (f6e3d8e) into master (53c6b85) will increase coverage by 0.10%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #305      +/-   ##
==========================================
+ Coverage   91.02%   91.12%   +0.10%     
==========================================
  Files          33       33              
  Lines        2284     2277       -7     
==========================================
- Hits         2079     2075       -4     
+ Misses        205      202       -3     

Flag	Coverage Δ
unittests	91.12% <100.00%> (+0.10%)	:arrow_up:

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

Impacted Files	Coverage Δ
piq/fid.py	92.72% <ø> (+1.49%)	:arrow_up:
piq/kid.py	90.42% <ø> (+1.65%)	:arrow_up:
piq/dss.py	100.00% <100.00%> (ø)
piq/perceptual.py	100.00% <100.00%> (ø)
piq/srsim.py	99.00% <100.00%> (ø)
piq/ssim.py	100.00% <100.00%> (ø)

[snk4tr]

@denproc thanks for the PR. As you see from the review, I think that several changes that you proposed are not actually required. Let me know what you think. There are several nice catches though 👍 .

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

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0.0% Duplication