Oriented Bounding Boxes

[kozlov721]

Purpose

Add native oriented bounding box support to Luxonis Data Format handling. Bounding boxes now consistently carry an
angle, defaulting to 0, so axis-aligned boxes are represented as OBBs without a separate legacy path.

Specification

• Bounding box annotations now include an optional angle field and loader outputs use [class, x, y, w, h, angle]
• Augmentations, visualization, LDF equivalence, and export validation were updated to handle OBB rows
• Albumentations uses axis-aligned boxes for filtering plus hidden corner keypoints to preserve OBB geometry through spatial transforms.

Dependencies & Potential Impact

None / not applicable

Deployment Plan

None / not applicable

Testing & Validation

None / not applicable

AI Usage

Assisted-by: OpenAI Codex:GPT-5

Submitted code was reviewed by a human: Yes

The author is taking the responsibility for the contribution: YES

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: de43f832-08e7-4350-b42a-0da9f1d04e8e

📥 Commits

Reviewing files that changed from the base of the PR and between b377f0a and 32163f9.

📒 Files selected for processing (25)

• luxonis_ml/data/augmentations/albumentations_engine.py
• luxonis_ml/data/augmentations/custom/letterbox_resize.py
• luxonis_ml/data/augmentations/custom/mixup.py
• luxonis_ml/data/augmentations/custom/mosaic.py
• luxonis_ml/data/augmentations/custom/symmetric_keypoints_flip.py
• luxonis_ml/data/augmentations/utils.py
• luxonis_ml/data/datasets/annotation.py
• luxonis_ml/data/datasets/luxonis_dataset.py
• luxonis_ml/data/exporters/exporter_utils.py
• luxonis_ml/data/loaders/__init__.py
• luxonis_ml/data/loaders/luxonis_loader.py
• luxonis_ml/data/utils/ldf_equivalence.py
• luxonis_ml/data/utils/visualizations.py
• tests/conftest.py
• tests/test_data/test_annotations.py
• tests/test_data/test_augmentations/test_batched.py
• tests/test_data/test_augmentations/test_empty.py
• tests/test_data/test_augmentations/test_mixup.py
• tests/test_data/test_augmentations/test_nested_transforms.py
• tests/test_data/test_augmentations/test_special.py
• tests/test_data/test_augmentations/test_symmetric_keypoints_flip.py
• tests/test_data/test_augmentations/test_utils.py
• tests/test_data/test_export.py
• tests/test_data/test_loader.py
• tests/test_data/test_utils/test_visualizations.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/obb

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[codecov]

Codecov Report

❌ Patch coverage is 90.00000% with 25 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.26%. Comparing base (b377f0a) to head (32163f9).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
luxonis_ml/data/utils/visualizations.py	62.50%	18 Missing ⚠️
luxonis_ml/data/datasets/annotation.py	87.87%	4 Missing ⚠️
luxonis_ml/data/augmentations/utils.py	96.29%	2 Missing ⚠️
...a/augmentations/custom/symmetric_keypoints_flip.py	93.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #441      +/-   ##
==========================================
- Coverage   93.33%   93.26%   -0.08%     
==========================================
  Files         156      157       +1     
  Lines       11870    12099     +229     
==========================================
+ Hits        11079    11284     +205     
- Misses        791      815      +24     

Flag	Coverage Δ
pytest-ubuntu-latest	93.26% <90.00%> (-0.08%)	⬇️

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