This is the official PyTorch implementation of our paper: Conditional Extreme Value Theory for Open Set Video Domain Adaptation

Paper link: https://dl.acm.org/doi/10.1145/3469877.3490600

Requirements

• Python 3.6, PyTorch 0.4, CUDA 10.0+
• The full requirements can be found in requirements.txt

Datasets

Experiments are conducted on two datasets: UCF-HMDB, UCF-Olympic.

The downloaded files need to store in ./dataset.

Pre-extracted features and data lists can be downloaded as,

• Features
  • UCF: download
  • HMDB: download
  • Olympic: training | validation
• Data lists
  • UCF-Olympic
    • UCF: training list | validation list
    • Olympic: training list | validation list
  • UCF-HMDB
    • UCF: training list | validation list
    • HMDB: training list | validation list

Datasets Split

For the open-set domain adaptation task, we need to keep source samples with known classes 0, 1, ..., C-1, C only and remove all source samples with classes C+1, C+2, ... We also need to change the unkown classes (C+1, C+2, ...) of target samples to (C+1), which is unknown class. To complete the datasets splitting, follow the steps below as an example of Olympic → UCF:

1. Rename the data list files ("org" means "original", which is used to backup the original list.):
   • dataset/olympic/list_olympic_train_ucf_olympic-feature.txt → dataset/olympic/list_olympic_train_ucf_olympic-feature_org.txt
   • dataset/ucf101/list_ucf101_train_ucf_olympic-feature.txt → dataset/ucf101/list_ucf101_train_ucf_olympic-feature_org.txt
   • dataset/ucf101/list_ucf101_val_ucf_olympic-feature.txt → dataset/ucf101/list_ucf101_val_ucf_olympic-feature_org.txt
2. In the script open_set_data.py, follow the comments to understand and set the variables as you need.
3. Run open_set_data.py. You will get 3 processed list files.
4. According to the number of known classes you choose, remove lines of unknown classes in the file data/classInd_ucf_olympic.txt. Also, remember to keep the original file.

Dataset Selection and Hyper-parameter Selection

In the main script main.py, there there are two blocks of code: BLOCK 1 and BLOCK 2. These two blocks are used for select the dataset (put the names of 3 processed list files and modified class file) and hyper-parameters (best hyper-parameters are in paper), separately.

########## BLOCK 1: Change Here for Different Datasets ##########
args.class_file = "data/classInd_ucf_olympic.txt"
args.train_source_list = "dataset/olympic/list_olympic_train_ucf_olympic-feature.txt"
args.train_target_list = "dataset/ucf101/list_ucf101_train_ucf_olympic-feature.txt"
args.val_list = "dataset/ucf101/list_ucf101_val_ucf_olympic-feature.txt"
########## END OF BLOCK 1 ##########

########## BLOCK 2: Change Here for Different Hyper-Parameters ##########
args.lambda_ = 0.214 # H->U 0.7 | U->O 0.19 | O->U 0.214
args.adv_param = 5 # H->U 0.10 | U->O 1.83 | O->U 5
args.EVT_threshold = 0.3 # H->U 0.45 | U->O  0.565 | O->U 0.3
########## END OF BLOCK 2 ##########

Get Started

Once you have done the steps above, then you can run the code.

python main.py

Whenever you completed an adaptation experiment (e.g. Olympic → UCF), remember to remove the 3 processed list files and restore backups by removing _org. Then, for the next experiment with different adaptation task (e.g. UCF → Olympic), you need to do the Datasets Split again for that task.

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