Awesome

Towards3DVRSketch

The code for the paper:

"Towards 3D VR-Sketch to 3D Shape Retrieval"   
Ling Luo, Yulia Gryaditskaya, Yongxin Yang, Tao Xiang, Yi-Zhe Song
Proceedings of International Conference on 3D Vision (3DV), 2020

Paper Link: [Paper] [Supplemental]

Project page: https://tinyurl.com/3DSketch3DV

:tada: Important Update: We have published the first fine-grained human sketch dataset at https://cvssp.org/data/VRChairSketch/ for Fine-Grained VR Sketching: Dataset and Insights on 3DV 2021.

Description

The repository provides the code for synthetic sketch generation and the evaluated deep models.

Synthetic sketch generation

1. Convert to manifold shapes

Since many shapes in the publicly available datasets are not manifold shapes, we first recommend preprocessign shapes with this method: https://github.com/hjwdzh/ManifoldPlus

@article{huang2020manifoldplus,
  title={ManifoldPlus: A Robust and Scalable Watertight Manifold Surface Generation Method for Triangle Soups},
  author={Huang, Jingwei and Zhou, Yichao and Guibas, Leonidas},
  journal={arXiv preprint arXiv:2005.11621},
  year={2020}
}

2. Extract curve networks

To extract the curve netwrok we use the auhtors implementation of this paper: https://www.cs.ubc.ca/labs/imager/tr/2017/FlowRep/

@article{59,
  author  = {Gori, Giorgio and Sheffer, Alla and Vining, Nicholas and Rosales, Enrique and Carr, Nathan and Ju, Tao},
  title   = {FlowRep: Descriptive Curve Networks for Free-Form Design Shapes},
  journal = {ACM Transaction on Graphics},
  year    = {2017},
  volume = {36},
  number = {4},
  doi = {http://dx.doi.org/10.1145/3072959.3073639},
  publisher = {ACM},
  address = {New York, NY, USA}
}

3. Synthetic sketch generation

Dependencies

• libigl https://libigl.github.io/
• pyknotid https://pyknotid.readthedocs.io/en/latest/
• similaritymeasures

pip install pyknotid
pip install similaritymeasures

Step 1: Aggregation (C++)

To compile the code in SyntheticSketches/merge_lines, please see the README in SyntheticSketches/merge_lines

python SyntheticSketches/agrregate_network.py folder_netwroks folder_save executable_path

where folder_netwroks is a path to the networks generated with FlowRep; folder_save the path where to save the cleaned networks; executable_path the path to a compiled SyntheticSketches/merge_lines.

Step 2: Aggregation & Distortion (Python)

python SyntheticSketches/disturb_3d.py folder_netwroks folder_save

folder_netwroks is a path to the networks from the previous step or generated with FlowRep; folder_save the path where to save the synthetic sketches.

Dataset

This dataset includes .obj files and train/vallidation/test partition of:

• 3956 shapes + curve network + synthetic sketch from ModelNet10
• 167 human sketches from chair and bathtub classes of ModelNet10

Download link: Google Drive

Deep models

The deep models and their usage is described in the subfolder: '3DSketchRetrieval'

Contact information

Ling Luo: ling.rowling.luo@gmail.com