docs: fix small typo, and starting updating model file.

Author: Kin-Zhang

README.md

@@ -33,7 +33,7 @@ European Conference on Computer Vision (**ECCV**) 2024
 
 - **ICP-Flow: LiDAR Scene Flow Estimation with ICP**  
 *Yancong Lin, Holger Caesar*  
-Conference on Computer Vision and Pattern Recognition (**CVPR**) 2024
+Conference on Computer Vision and Pattern Recognition (**CVPR**) 2024  
 [ Optimization-based ] [ Self-Supervised ] - [ [arXiv](https://arxiv.org/abs/2402.17351) ] [ [Project](https://github.com/yanconglin/ICP-Flow) ] → [here](#icp-flow)
 
 - **DeFlow: Decoder of Scene Flow Network in Autonomous Driving**  

src/models/__init__.py

@@ -36,3 +36,11 @@
     from .fastnsf import FastNSF
 except ImportError:
     print("--- WARNING [model]: FastNSF is not imported, as it requires FastGeodis lib which is not installed.")
+
+# following need install extra package:
+# * pip install pytorch3d assets/cuda/histlib
+try:
+    from .icpflow import ICPFlow
+except ImportError:
+    print("--- WARNING [model]: ICPFlow is not imported, as it requires pytorch3d lib which is not installed.")
+    print(f"Detail error message\033[0m: {e}. Just ignore this warning if code runs without these models.")