Upload README.md

README.md

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+---
+license: cc-by-4.0
+pretty_name: COCO 2017 LibreYOLO Assets
+task_categories:
+- object-detection
+tags:
+- coco
+- yolo
+- libreyolo
+---
+
+# COCO 2017 LibreYOLO Assets
+
+This dataset repository hosts small COCO 2017 helper assets used by LibreYOLO dataset YAML files.
+
+Files:
+
+- `instances_val2017.json`: official COCO 2017 validation instance annotations.
+- `coco2017labels-libreyolo.zip`: YOLO-format train/val label files generated by LibreYOLO from the official COCO 2017 instance annotations.
+
+No COCO images are included here. LibreYOLO downloads COCO images from the official COCO image hosts.
+
+## License and Attribution
+
+The COCO annotations are licensed by the COCO Consortium under Creative Commons Attribution 4.0. The converted YOLO labels are derived from the official COCO 2017 train/val instance annotations and are provided under the same annotation license.
+
+Attribution: COCO Consortium / Microsoft COCO dataset.
+
+## Conversion Notes
+
+The YOLO label zip was generated locally by LibreYOLO from `instances_train2017.json` and `instances_val2017.json`.
+
+- COCO categories are ordered by official `category_id`, matching LibreYOLO's COCO YAML class order.
+- Bounding boxes are converted from COCO `xywh` pixels to normalized YOLO `class x_center y_center width height` rows.
+- `iscrowd` annotations are omitted.
+- Invalid or empty boxes are omitted.
+- One `.txt` label file is written for every train/val image, including empty files for images without valid objects.
+
+## Checksums
+
+```text
+instances_val2017.json
+SHA256: E8C7F7908F1D7278341FAE127D0DA654F102F11BD7B21D8AEEFA635B8C810B6F
+
+coco2017labels-libreyolo.zip
+SHA256: BDDA16FD74809745D9FC303335DAD63E6D1FE85CA53B2C32A49C252587252CBB
+```