Add feature which converting json format bbox annotated file to the standard txt format on the ROOT folder

[bstoddgroup]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Adds support for converting custom JSON-annotated datasets to YOLOv5-compatible TXT format, making it easier to use new datasets for training and validation. 📝🔄

📊 Key Changes

• New Dataset Config: Introduces custom-dataset.yaml for defining a custom dataset with 16 classes (e.g., person, helmet, car, bus).
• Conversion Script: Adds json2txt.py, a script to convert JSON annotation files into YOLOv5 TXT label format.
• Command-Line Tool: Allows users to run the conversion with a simple command, specifying the dataset YAML file.

🎯 Purpose & Impact

• Simplifies Dataset Preparation: Makes it much easier for users to bring their own annotated data (in JSON format) into the YOLOv5 workflow.
• Broader Dataset Support: Enables training YOLOv5 models on a wider variety of custom datasets without manual label conversion.
• User-Friendly: Reduces the technical barrier for new users wanting to train on their own data, speeding up experimentation and deployment.

🚀 This update is especially helpful for anyone looking to use YOLOv5 with their own labeled images!

[github-actions]

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2 out of 3 committers have signed the CLA.
✅ (UltralyticsAssistant)[https://github.com/UltralyticsAssistant]
✅ (bstoddgroup)[https://github.com/bstoddgroup]
❌ @mangwaier
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[UltralyticsAssistant]

👋 Hello @bstoddgroup, thank you for submitting a ultralytics/yolov5 🚀 pull request! To help ensure a smooth review and integration process, please review the following checklist:

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[bstoddgroup]

I have read the CLA Document and I sign the CLA

[bstoddgroup]

在 2025-05-21 12:36，github-actions[bot] 写道：

github-actions[bot] left a comment (ultralytics/yolov5#13600) [1] Thank you for your submission, we really appreciate it. Like many open-source projects, we ask that you sign our Contributor License Agreement [2] before we can accept your contribution. You can sign the CLA by just posting a Pull Request Comment same as the below format. ------------------------- I have read the CLA Document and I sign the CLA ------------------------- You can retrigger this bot by commenting recheck in this Pull Request. Posted by the CLA Assistant Lite bot. -- Reply to this email directly, view it on GitHub [1], or unsubscribe [3]. You are receiving this because you authored the thread.Message ID: ***@***.***> Links: ------ [1] #13600 (comment) [2] https://docs.ultralytics.com/help/CLA [3] https://github.com/notifications/unsubscribe-auth/BSUKKHLNKY3YGFWTRQYVGLT27QQXHAVCNFSM6AAAAAB5SMNDESVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDQOJWHAZTOMZZGM

I have read the CLA Document and I sign the CLA