Update README.md

README.md

@@ -2,13 +2,13 @@
 license: apache-2.0
 ---
 
-## FlowOcc3D (3D Occypancy Flow Dataset)
+# FlowOcc3D (3D Occypancy Flow Dataset)
 
 Download [FlowOcc3D](https://huggingface.co/viewformer/ViewFormer-Occ/blob/main/occ_flow_sparse_ext.zip). Unzip it in `./data/nuscenes`.
 
 Our FlowOcc3D assigns a flow vector to each foreground occupancy of [Occ3D](https://github.com/CVPR2023-3D-Occupancy-Prediction/CVPR2023-3D-Occupancy-Prediction).
 
-Here we briefly introduce what the downloaded FlowOcc3D data looks like. We store the flow and index of the foreground voxels in the `.bin` file and the `_idx.bin` file.
+Here we briefly introduce how to use FlowOcc3D. We store the flow and index of each foreground voxel in the `xxx.bin` file and `xxx_idx.bin` file.
 ```python
 W, H, Z = 200, 200, 16
 sample_idx = results['sample_idx'] # nuScenes sample token