Adjusting LineZoneAnnotator to display per-class counts in annotations

[RaghavvGupta]

Adjusting LineZoneAnnotator to display per-class counts in annotations #790

Description

Introduced per-class counts for objects crossing the line. Updated the trigger method to handle per-class counts.

Type of change

class_in_count (Dict[int, int]): A dictionary to store per-class in counts.
class_out_count (Dict[int, int]): A dictionary to store per-class out counts.
These dictionaries will store counts for each class separately.

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

[LinasKo]

Hi @RaghavvGupta 👋

Thank you for your contribution, and apologies for the long wait.

Your solution fits the original specification (except for tests on Colab), but there were a few flaws and we had no time to give feedback. Briefly:

1. This removed the prior in_count and out_count variables which might break existing code
2. This creates new behaviour for the existing annotator, without providing a way to access old annotation style.
3. There's no Colab with tests.

It turned out a more complicated change than we expected, but the implementation is on #1555.

I'll close this one, but you have my sincerest thanks for the effort put in! 🙏

[RaghavvGupta]

Hi @LinasKo, Thanks for your feedback! I have understood the implementation and sincerely apologise for not being able to deliver the requisite. However, I learned a lot from this!
Thanks again for giving me this opportunity!