SymmetryNet

SymmetryNet: Learning to Predict Reflectional and Rotational Symmetries of 3D Shapes from Single-View RGB-D Images

ACM Transactions on Graphics (Proceedings of SIGGRAPH Asia 2020)

Created by Yifei Shi, Junwen Huang, Hongjia Zhang, Xin Xu, Szymon Rusinkiewicz and Kai Xu

This repository includes:

• tools: the training scripts and evaluation scripts
  • tools/train_shapenet.py: the training script for shapenet dataset
  • tools/train_ycb.py: the training script for ycb dataset
  • tools/train_scannet.py: the training script for scannet dataset
  • tools/evaluation: the evaluation scripts
    • evaluation/eval_ref_shapenet.py: the evaluation script for reflectional symmetry on shapenet dataset
    • evaluation/eval_ref_ycb.py: the evaluation script for reflectional symmetry on ycb dataset
    • evaluation/eval_ref_scannet.py: the evaluation script for reflectional symmetry on scannet dataset
    • evaluation/eval_rot_shapenet.py: the evaluation script for rotational symmetry on shapenet dataset
    • evaluation/eval_rot_ycb.py: the evaluation script for rotational symmetry on ycb dataset
    • evaluation/eval_rot_scannet.py: the evaluation script for rotational symmetry on scannet dataset
• lib: the core Python library for networks and loss
  • lib/loss.py: symmetrynet loss caculation for both reflectional and rotational symmetries,the loss items are listed at the end of the text
  • lib/network.py: network architecture
  • lib/tools.py: functions for the operation of rotation and reflection
  • lib/verification.py: verification of the rotational and reflectional symmetries
• datasets: the dataloader and training/testing lists
  • datasets/shapenet/dataset.py: the training dataloader for shapnet dataset
  • datasets/shapenet/dataset_eval.py: the evaluation dataloader for shapnet dataset
    • datasets/shapenet/dataset_config/*.txt: training and testing splits for shapenet dataset, the testing splits includ holdout view/instance/category
  • datasets/ycb/dataset.py: the training dataloader for ycb dataset
  • datasets/ycb/dataset_eval.py: the evaluation dataloader for ycb dataset
    • datasets/ycb/dataset_config/*.txt: training and testing splits for shapenet dataset,the training/testing splits fallow the ycb defult settings
  • datasets/shapenet/dataset.py: the training dataloader for scannet dataset
  • datasets/shapenet/dataset_eval.py: the evaluation dataloader for scannet dataset
    • datasets/scannet/dataset_config/*.txt: training and testing splits for scannet dataset,the testing splits includ holdout view/scene

Environments

pytorch>=0.4.1 python >=3.6

Datasets

• ShapeNet dataset

  • shapenetcore: this folder saves the models and their ground truth symmetries for each instance
  • rendered_data: this folder saves the rgbd images that we rendered for each instance, including their ground truth pose and camera intrinsic matrix, etc.
  • name_list.txt: this file saves the correspondence between the name of instances and their ID in this project(the names are too long to identify)

• YCB dataset

  • models: this folder saves the ground truth model symmetry for each instance
  • data: this folder saves the rgbd videos and the ground truth poses and camera information
  • classes.txt: this file saves the correspondence between the name of YCB objects and their *.xyz models
  • symmetries.txt: this file saves all the ground truth symmetries for ycb object models

Training

To train the network with the default parameter on shapenet dataset, run

python tools/train_shapenet.py --dataset_root= your/folder/to/shapnet/dataset

To train the network with the default parameter on ycb dataset, run

python tools/train_ycb.py --dataset_root= your/folder/to/ycb/dataset

To train the network with the default parameter on scannet dataset, run

python tools/train_scannet.py --dataset_root= your/folder/to/scannet/dataset

Evaluation

To evaluate the model with our metric on shapenet, for reflectional symmetry, run

python tools/evaluation/eval_ref_shapenet.py

for rotational symmetry, run

python tools/evaluation/eval_rot_shapenet.py

To evaluate the model with our metric on ycb, for reflectional symmetry, run

python tools/evaluation/eval_ref_ycb.py

for rotational symmetry, run

python tools/evaluation/eval_rot_ycb.py

To evaluate the model with our metric on scannet, for reflectional symmetry, run

python tools/evaluation/eval_ref_scannet.py

for rotational symmetry, run

python tools/evaluation/eval_rot_scannet.py

Pretrained model & data download

The pretrained models and data can be found at here (dropbox) and here (baidu yunpan, password: symm).