fix padding

[MateoLostanlen]

We use a letterbox transformation for the yolo, which adds padding to the image. This padding was not taken into account in the bounding box, resulting in an offset in the bbox displayed on the platform

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.96%. Comparing base (035c5ae) to head (92667b1).

❗ Current head 92667b1 differs from pull request most recent head 03121e7. Consider uploading reports for the commit 03121e7 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #179      +/-   ##
===========================================
+ Coverage    87.87%   87.96%   +0.09%     
===========================================
  Files            6        6              
  Lines          371      374       +3     
===========================================
+ Hits           326      329       +3     
  Misses          45       45              

Flag	Coverage Δ
unittests	87.96% <100.00%> (+0.09%)	⬆️

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