README.md

metadata

license: mit
library_name: torch-pointcloud
tags:
  - point-cloud
  - 3d
  - pytorch
  - torch-pointcloud
  - point-m2ae
  - classification
datasets:
  - modelnet40
base_model: torch-pointcloud/point-m2ae-base.pretrain.renrui-zhang
model-index:
  - name: point-m2ae-base.modelnet40.renrui-zhang
    results:
      - task:
          type: point-cloud-classification
        dataset:
          name: ModelNet40
          type: modelnet40
        metrics:
          - name: OA
            type: accuracy
            value: 92.87

Model card for point-m2ae-base.modelnet40.renrui-zhang

A Point-M2AE point cloud classification model (multi-scale masked autoencoder). Trained on ModelNet40.

Model Details

• Model Type: Point cloud classification
• Model Stats:
  • Params (M): 12.8
  • Classes: 40
  • Features: 384
• Dataset: ModelNet40
• Metrics: OA 92.87 (reference 93.43)
• Paper: Point-M2AE: Multi-scale Masked Autoencoders for Hierarchical Point Cloud Pre-training
• Converted from: ZrrSkywalker/Point-M2AE (MIT)
• Library: torch-pointcloud

Install

pip install torch-pointcloud

Usage

import torch
import torch_pointcloud as tp
from torch_pointcloud.utils.data import collate

model, info = tp.create_model(
    "point-m2ae-base.modelnet40.renrui-zhang",
    task="classification",
    pretrained=True,
    return_info=True,
)
model = model.eval()

# synthetic sample with the keys a dataset provides
num_points = 8192
sample = {
    "pos": torch.randn(num_points, 3),
    "normal": torch.randn(num_points, 3),
}
data = info["transform"](sample)
data = collate([data])

with torch.no_grad():
    logits = model(data.get("x"), data["pos"], data["batch"])

Feature extraction

with torch.no_grad():
    embeddings = model.forward_features(data.get("x"), data["pos"], data["batch"])

model.reset_classifier(num_classes=0)
with torch.no_grad():
    embeddings = model(data.get("x"), data["pos"], data["batch"])  # (B, 384)

Citation

@inproceedings{zhang2022pointm2ae,
  title   = {Point-M2AE: Multi-scale Masked Autoencoders for Hierarchical Point Cloud Pre-training},
  author  = {Renrui Zhang and Ziyu Guo and Rongyao Fang and Bin Zhao and Dong Wang and Yu Qiao and Hongsheng Li and Peng Gao},
  booktitle = {NeurIPS},
  year    = {2022}
}

@inproceedings{wu2015modelnet,
  title   = {3D ShapeNets: A Deep Representation for Volumetric Shapes},
  author  = {Zhirong Wu and Shuran Song and Aditya Khosla and Fisher Yu and Linguang Zhang and Xiaoou Tang and Jianxiong Xiao},
  booktitle = {CVPR},
  year    = {2015}
}

@software{dujardin2026pytorchpointcloud,
  author  = {Arthur Dujardin},
  title   = {PyTorch PointCloud},
  year    = {2026},
  doi     = {10.5281/zenodo.22159632},
  url     = {https://github.com/arthurdjn/pytorch-pointcloud},
}