Update README.md

README.md

@@ -46,4 +46,83 @@ configs:
     path: data/train-*
 ---
 
-**Note:** Boxes in "bbox" key are in `XYWH` format or `[x_min, y_min, box_width, box_height]`. If you'd like them in `XYXY` format, you'll have to convert them.
+## Load data
+
+```python
+import datasets
+
+dataset = datasets.load_dataset("mrdbourke/trashify_manual_labelled_images")
+dataset
+```
+
+## View a sample
+
+```python
+dataset["train"][0]
+```
+
+Output:
+
+```
+{'image': <PIL.Image.Image image mode=RGB size=960x1280>,
+ 'image_id': 292,
+ 'annotations': {'file_name': ['00347467-13f1-4cb9-94aa-4e4369457e0c.jpeg',
+   '00347467-13f1-4cb9-94aa-4e4369457e0c.jpeg'],
+  'image_id': [292, 292],
+  'category_id': [1, 0],
+  'bbox': [[523.7000122070312,
+    545.0999755859375,
+    402.79998779296875,
+    336.1000061035156],
+   [10.399999618530273,
+    163.6999969482422,
+    943.4000244140625,
+    1101.9000244140625]],
+  'iscrowd': [0, 0],
+  'area': [135381.078125, 1039532.4375]},
+ 'label_source': 'manual_prodigy_label',
+ 'image_source': 'manual_taken_photo'}
+```
+
+**Note:** Boxes in "bbox" key are in `XYWH` format or `[x_min, y_min, box_width, box_height]`. If you'd like them in `XYXY` format, you'll have to convert them.
+
+## Get categories
+
+```python
+# Get the categories from the dataset
+# Note: this requires the dataset to have been uploaded with this feature setup
+categories = dataset["train"].features["annotations"].feature["category_id"]
+
+# Get the names attribute
+categories.names
+
+>>> ['bin', 'hand', 'not_bin', 'not_hand', 'not_trash', 'trash', 'trash_arm']
+```
+
+## Create label2id and id2label
+
+```python
+id2label = {i: class_name for i, class_name in enumerate(categories.names)}
+label2id = {value: key for key, value in id2label.items()}
+
+id2label, label2id
+```
+
+Output:
+
+```
+({0: 'bin',
+  1: 'hand',
+  2: 'not_bin',
+  3: 'not_hand',
+  4: 'not_trash',
+  5: 'trash',
+  6: 'trash_arm'},
+ {'bin': 0,
+  'hand': 1,
+  'not_bin': 2,
+  'not_hand': 3,
+  'not_trash': 4,
+  'trash': 5,
+  'trash_arm': 6})
+```