1. Introduction  
2. Literature Review  
2.1. Panoptic Segmentation  
2.2. LiDAR Panoptic Segmentation  
2.3. Point Cloud Cluster Methods  
3. Selected Reviewed Methods  
3.1. Euclidean Cluster  
3.2. Supervoxel Cluster  
3.3. Depth Cluster  
3.4. Scan-line Run Cluster  
3.5. Implementations  
4. Experiments  
4.1. Dataset  
4.2. Metrics  
4.4. State-of-the-art Comparison on Leaderboard  
4.5. Time Complexity  
5. Conclusion