Rename 'labels' to 'instances'

[glenn-jocher]

Align naming with HUB

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Improved logging format for training and validation in YOLOv5.

📊 Key Changes

• Updated printed logger format in train.py, changing the names and spacing for better clarity (e.g., from gpu_mem to GPU_mem, box to box_loss, etc.).
• Adjusted the progress bar description format to match the new logger changes.
• In val.py, updated result logging format (e.g., from Labels to Instances) and increased the class name field width for better alignment.

🎯 Purpose & Impact

• Enhanced Readability: The new format provides clearer and more descriptive logging information, aiding users in quickly understanding training and validation outputs.
• Consistency in Metrics: Consistent naming such as *_loss for loss metrics and Instances helps in understanding the entries as part of a standard format across different sections.
• Better Logging UX: Increasing the width for class names prevents text from wrapping, improving the overall user experience during model progress checks.

These changes mainly impact the user interface in terms of readability and consistency, with no direct impact on model performance or functionality. Users can now enjoy a more intuitive understanding of what's happening during model training and validation. 🚀

[glenn-jocher]

@AyushExel @robotwhispering what do you think?

Existing printout

Proposed PR printout

[AyushExel]

I prefer proposed printout.

[glenn-jocher]

@AyushExel @robotwhispering PR is merged. Thank you for your contributions to YOLOv5 🚀 and Vision AI ⭐