part_sem_seg

Part Segmentation on PartNet

Preparing the Dataset

Make sure you request access to download the PartNet v0 dataset here. It's an official website of Partnet. Once the data is downloaded, extract the sem_seg_h5 data and put them inside a new folder called 'raw'. For example, our data folder structure is like this: /data/deepgcn/partnet/raw/sem_seg_h5/category-level. category is the name of a category, eg. Bed. level is 1, 2, or 3. When we train and test, we set --data_dir /data/deepgcn/partnet.

Train

We train each model on one tesla V100.

For training the default ResEdgeConv-28 with 64 filters on the Bed category, run:

python main.py --phase train  --category 1 --data_dir /data/deepgcn/partnet

Note that, We only focus on fine-grained level of part segmentation in the experiment. For all the categories, we use the same training parameters as default (see config.py for details).

If you want to train a model with other gcn layers (for example mrgcn), run

python main.py --phase train --category 1 --conv mr --data_dir /data/deepgcn/partnet

Other important parameters are:

--block         graph backbone block type {res, plain, dense}
--conv          graph conv layer {edge, mr, sage, gin, gcn, gat}
--n_filters     number of channels of deep features, default is 64
--n_blocks      number of basic blocks, default is 28
--category      NO. of category. default is 1 (Bed)

The category list is:

category_names = ['Bag', 'Bed', 'Bottle', 'Bowl', 'Chair', 'Clock', 'Dishwasher', 'Display', 'Door', 'Earphone',  # 0-9
        'Faucet', 'Hat', 'Keyboard', 'Knife', 'Lamp', 'Laptop', 'Microwave', 'Mug', 'Refrigerator', 'Scissors',  # 10-19
        'StorageFurniture', 'Table', 'TrashCan', 'Vase'] 

Test

We test and report results on the testing dataset using the checkpoints which perform the best in the validation dataset.
Our pretrained models can be found from Google Cloud.

The Naming format of our pretrained model is: task-category-segmentationLevel-conv-n_blocks-n_filters-otherParameters-val_best_model_best.pth, eg. PartnetSemanticSeg-Bed-L3-res-edge-n28-C64-k9-drop0.5-lr0.005_B6-val_best_model.pth. val_best means the checkpoint is the best one on the validation dataset.

Use the parameter --pretrained_model to set a specific pretrained model to load. For example,

python -u main.py --phase test --category 1 --pretrained_model checkpoints/PartnetSemanticSeg-Bed-L3-res-edge-n28-C64-k9-drop0.5-lr0.005_B6-val_best_model.pth --data_dir /data/deepgcn/partnet  --test_batch_size 8

Please also specify the number of blocks and filters.
Note:

• the path of --pretrained_model is a relative path to main.py, so don't add examples/part_sem_seg in --pretrained_model. Or you can feed an absolute path of --pretrained_model.
• if you do not have V100, you can set the test_batch_size to 1. It does not influence the test accuracy.

Visualization

1. step1 Use the script eval.py to generate .obj files to be visualized:

python -u eval.py --phase test --category 1 --pretrained_model checkpoints/PartnetSemanticSeg-Bed-L3-res-edge-n28-C64-k9-drop0.5-lr0.005_B6-val_best_model.pth --data_dir /data/deepgcn/partnet

2. step2 To visualize the output of a trained model please use visualize.py. Define the path to the result folder (--dir_path), category's number (--category), the No. of model instance (--obj_no), the folders to visualize (--folders) and run below:

python -u visualize.py --dir_path /change/the/path/to/your/result/ --category 1 --obj_no 0 --folders res

dir_path is the path to the folder of your result, the structure is the following:

dir_path
    ├── res      # result folder for ResGCN
         ├── Bed    # result of Bed class
         ├── Bottle # result of Bottle class
         ...        # result of other classes
         
    ├── plain    # result folder for PlainGCN
         ├── Bed    # result of Bed class
         ├── Bottle # result of Bottle class
         ...        # result of other classes