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CADTransformer: Panoptic Symbol Spotting Transformer for CAD Drawings(CVPR2022 Oral)

Official Pytorch Implementation of CVPR2022

Installation

We recommend users to use conda to install the running environment. The following dependencies are required:

CUDA=11.1
Python=3.7.7
pytorch=1.9.0
torchvision=0.10.0
sklearn=1.0.1
pillow=8.3.1
opencv-python
matplotlib
scipy
tqdm
gdown
svgpathtools

Our code should compatible with pytorch>=1.5.0

Download Pretrained HRNet

The Input Embedding network is based on HRNet-W48-C, the pretrained model on ImageNet can be download from official cloud drive.

cd CADTransformer
mkdir pretrained_models

Put the downloaded pretrained HRNet to CADTransformer/pretrained_models/

Data Preparation

We provide several samples of the converted data, users can run our code without downloading from official FloorPlanCAD dataset from its website. In order to train the model on entire FloorPlanCAD dataset, users need first download data from official cloud drive. Then unzip and re-arrange files according to the following commands to form the this directory structure:

download from floorplancad website

python preprocess/download_data.py  --data_save_dir  /ssd1/zhiwen/datasets/svg_raw

convert semantic labeling to floorplanCAD v1 version and generate rasterized images

python preprocess/svg2png.py --train_00 /ssd1/zhiwen/datasets/svg_raw/train-00 --train_01 /ssd1/zhiwen/datasets/svg_raw/train-01  --test_00  /ssd1/zhiwen/datasets/svg_raw/test-00   --svg_dir /ssd1/zhiwen/datasets/svg_processed/svg   --png_dir /ssd1/zhiwen/datasets/svg_processed/png   --scale 7  --cvt_color

generate npy format data

python preprocess/preprocess_svg.py -i /ssd1/zhiwen/datasets/svg_processed/svg/train  -o /ssd1/zhiwen/datasets/svg_processed/npy/train   --thread_num  48
python preprocess/preprocess_svg.py -i /ssd1/zhiwen/datasets/svg_processed/svg/test  -o /ssd1/zhiwen/datasets/svg_processed/npy/test   --thread_num  48
python preprocess/preprocess_svg.py -i /ssd1/zhiwen/datasets/svg_processed/svg/val  -o /ssd1/zhiwen/datasets/svg_processed/npy/val   --thread_num  48

mkdir data ln -s /ssd1/zhiwen/datasets/svg_processed ./data/floorplancad_v2

├── data
├──├── FloorPlanCAD
├──├──├── npy(converted using script)
│  │  │   └── test
│  │  │   └── train   
│  │  │   └── val    
├──├──├── png(converted using script)
│  │  │   └── test
│  │  │   └── train  
│  │  │   └── val  
├──├──├── svg(download from (https://floorplancad.github.io/))
│  │  │   └── test
│  │  │   └── train  
│  │  │   └── val  

Usage

After installing the required libraries, users can directly train CADTransformer using the provided data samples

CUDA_VISIBLE_DEVICES=0 python -m torch.distributed.launch --nproc_per_node=1 train_cad_ddp.py --data_root /PATH/TO/PROJECT_DIR/data/FloorPlanCAD --pretrained_model /PATH/TO/PROJECT_DIR/pretrained_models/hrnetv2_w48_imagenet_pretrained.pth

One can speed up the training process by using multiple GPUs

CUDA_VISIBLE_DEVICES=0,1,2,3 python -m torch.distributed.launch --nproc_per_node=4 train_cad_ddp.py --data_root /PATH/TO/PROJECT_DIR/data/FloorPlanCAD --pretrained_model /PATH/TO/PROJECT_DIR/pretrained_models/hrnetv2_w48_imagenet_pretrained.pth

Users can directly do testing/validation of the CADTransformer using the provided data samples

CUDA_VISIBLE_DEVICES=0 python -m torch.distributed.launch --nproc_per_node=1 train_cad_ddp.py --data_root /PATH/TO/PROJECT_DIR/data/FloorPlanCAD --pretrained_model /PATH/TO/PROJECT_DIR/pretrained_models/hrnetv2_w48_imagenet_pretrained.pth --test_only

CUDA_VISIBLE_DEVICES=0 python -m torch.distributed.launch --nproc_per_node=1 train_cad_ddp.py --data_root /PATH/TO/PROJECT_DIR/data/FloorPlanCAD --pretrained_model /PATH/TO/PROJECT_DIR/pretrained_models/hrnetv2_w48_imagenet_pretrained.pth --val_only

Users can obtain the Panoptic Quality metric via the following command:

python scripts/evaluate_pq.py  --raw_pred_dir /PATH/TO/SAVE_DIR/IN/PREVIOUS/STEP 
--svg_pred_dir /PATH/TO/PROJECT_DIR/FloorPlanCAD/svg_pred --svg_gt_dir /PATH/TO/PROJECT_DIR/FloorPlanCAD/svg_gt  --thread_num 6

FQA

Out of memory?

[A]: Reduce the max primitive number via args.max_prim. I set it as 12000 on a 24GB GPU.

Acknowledgement

Thanks to Ross Wightman, qq456cvb, Ke Sun for opening source of their excellent works pytorch-image-models, Point-Transformers, HRNet.

Citation

If you find our code implementation helpful for your own resarch or work, please cite our paper.

@inproceedings{fan2022cadtransformer,
  title={CADTransformer: Panoptic Symbol Spotting Transformer for CAD Drawings},
  author={Fan, Zhiwen and Chen, Tianlong and Wang, Peihao and Wang, Zhangyang},
  booktitle={Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition},
  pages={10986--10996},
  year={2022}
}