Create README.md

DataAnnotation/labelme/examples/bbox_detection/README.md

+# Bounding Box Detection Example
+
+
+## Usage
+
+```bash
+labelme data_annotated --labels labels.txt --nodata --autosave
+```
+
+![](.readme/annotation.jpg)
+
+
+## Convert to VOC-format Dataset
+
+```bash
+# It generates:
+#   - data_dataset_voc/JPEGImages
+#   - data_dataset_voc/Annotations
+#   - data_dataset_voc/AnnotationsVisualization
+./labelme2voc.py data_annotated data_dataset_voc --labels labels.txt
+```
+
+<img src="data_dataset_voc/JPEGImages/2011_000003.jpg" width="33%" /> <img src="data_dataset_voc/AnnotationsVisualization/2011_000003.jpg" width="33%" />
+
+<i>Fig1. JPEG image (left), Bounding box annotation visualization (right).</i>