dev(narugo): add de-normalizers for the embeddings of the wd14 taggers

[narugo1992]

import numpy as np

from imgutils.tagging import get_wd14_tags, convert_wd14_emb_to_prediction, denormalize_wd14_emb
from test.testings import get_testfile

embedding, (r, g, c) = get_wd14_tags(
    get_testfile('nian.png'),
    fmt=('embedding', ('rating', 'general', 'character')),
)

# normalize embedding
embedding = embedding / np.linalg.norm(embedding)

# denormalize this embedding 
output = denormalize_wd14_emb(embedding)
print(output.shape)

# should be similar to r, g, c, approx 1e-3 error
rating, general, character = convert_wd14_emb_to_prediction(output)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.89%. Comparing base (510b6cc) to head (256758a).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #126      +/-   ##
==========================================
+ Coverage   96.87%   96.89%   +0.01%     
==========================================
  Files         106      106              
  Lines        3456     3476      +20     
==========================================
+ Hits         3348     3368      +20     
  Misses        108      108              

Flag	Coverage Δ
unittests	96.89% <100.00%> (+0.01%)	⬆️

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