Update README.md

README.md

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-license: cc-by-4.0
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+---
+license: cc-by-4.0
+---
+# Dataset Description
+RoboAfford is a large-scale dataset with dense, affordance-aware annotations for instruction grounded manipulation. 
+This dataset contains 819,987 images and 1.9 million QA pairs, unifying object affordances and spatial affordances to support interaction-centric learning in robotics.
+
+# Dataset Composition
+RoboAfford aggregates images from multiple datasets and generates QA pairs to provide a comprehensive dataset for affordance understanding.
+It consists of the following components:
+
+- **LVIS_absxy_513K.json**: 513K object detection QA pairs for 152,152 images sourced from [LVIS](https://www.lvisdataset.org/)
+
+- **pointing_absxy_190K.json**: 190K object pointing QA pairs for 63,907 images selected from [PixMo-Points](https://huggingface.co/datasets/allenai/pixmo-points)
+
+- **object_affordance_prediction_absxy_561K.json**: 561K object affordance prediction QA pairs for 45,790 images sourced from [PACO-LVIS](https://github.com/facebookresearch/paco)
+
+- **object_ref_max_points_10_absxy_347K.json**: 347K object reference QA pairs for 287,956 images sourced from [RoboPoint](https://huggingface.co/datasets/wentao-yuan/robopoint-data)
+
+- **region_ref_max_points_10_absxy_320K.json**: 320K region reference QA pairs for 270,182 images sourced from [RoboPoint](https://huggingface.co/datasets/wentao-yuan/robopoint-data)
+
+# Dataset Format
+Each json file contains a list of structured conversations with image references. The QA pairs follows the format:
+```
+{
+    "id": "paco_403013",
+    "image": "train2017/000000403013.jpg",
+    "conversations": [
+      {
+        "from": "human",
+        "value": "<image>\nWhat appliance can be used to heat food quickly? Your answer should be formatted as a list of tuples, i.e. [(x1, y1, x2, y2), ...], where each tuple contains the x, y coordinates of the top-left corner and bottom-right corner of the bounding box. The coordinates should be rounded to two decimal places, indicating the absolute pixel locations of the points in the image."
+      },
+      {
+        "from": "gpt",
+        "value": "[(258.14, 174.87, 283.79, 222.17)]"
+      },
+      {
+        "from": "human",
+        "value": "What appliance can be used to heat food quickly? Your answer should be formatted as a list of tuples, i.e. [(x1, y1), (x2, y2), ...], where each tuple contains the x and y coordinates of a point on the object. The coordinates should be rounded to two decimal places, indicating the absolute pixel locations of the points in the image."
+      },
+      {
+        "from": "gpt",
+        "value": "[(258.61, 213.0)]"
+      }
+    ]
+  }
+```
+
+# Evaluation
+For benchmarking protocols and evaluation metrics, please refer to [RoboAfford-Eval](https://huggingface.co/datasets/tyb197/RoboAfford-Eval) and [https://github.com/tyb197/RoboAfford](https://github.com/tyb197/RoboAfford) for more detailed information.