arxiv.org/pdf/2004.09845.pdf (IPCAI2020) Xueying Shi, Yueming Jin, Qi Dou, and Pheng-Ann Heng

The LRTD repository contains the codes of our LRTD paper. We validate our approach on a large surgical video dataset Cholec80 by performing surgical workflow recognition task. By using our LRTD based selection strategy, we can outperform other state-ofthe-art active learning methods who only consider neighbor-frame information. Using only up to 50% of samples, our approach can exceed the performance of full-data training

• python 3.6.9
• torch 0.4.1

1. download data from Cholec80 and then split the data into 25fps using ffmpeg.

   sh split_video_to_image.sh
   

2. Resize the image from 1920 x 1080 to 250 x 250

3. after creating data, my data folders would like the following structure

    ├── chorec80 
    |   ├── data_frames(put the raw image frames in this folder)
    |       ├── video01
    |          ├── video01-1.jpg
    |          ├── ...
    |          ├── video01-xxx.jpg
    |       ├── videoxxx
    |       ├── ...
    |       ├── video80
    |   ├── data_resize(put the resized image frames in this folder)	   
    |       ├── video01
    |          ├── video01-1.jpg
    |          ├── ...
    |          ├── video01-xxx.jpg
    |       ├── videoxxx
    |       ├── ...
    |       ├── video80
    |   ├── phase_annotations
    |       ├── video01-phase.txt
    |       ├── ...
    |       ├── video80-phase.txt
    |   ├── tool_annotations
    |       ├── video01-tool.txt
    |       ├── ...
    |       ├── video80-tool.txt
    
   
   

4. split data into train, val, test data (in our setting, we would downsample from 25fps to 1fps when spliting data)

   python get_paths_labels.py .
   

5. select partial data to train

• we initialized with randomly selected 10% data from the unlabelled sample pool. The selected data is stored in nonlocalselect_txt folder. Note that the select_chose can be 'DBN'(comparasion method) or 'non_local', for the first 10% data, we all use random selection, from the next selection, we separately use 'DBN' or 'non_local'. So the first 10% data select, we set '--is_first_selection=True' in ./nonlocalselect.sh, and can igore other parameter listed ./nonlocalselect.sh becuase we have set a break point after data selection, your can directly quit the program when meeting the break point, it means that you finished data selection. From 20%-50% data selection, we should comment '--is_first_selection=True'. Moreover, we should change '--val_model_path' to indicate which model as valiation model for the rest of the data. For example, we have already trained a model using 10% data, we use set this mode as validation model to select the next 10% data.

  ./nonlocalselect.sh to select data. 
  

4. for training of ResLSTM backbone, set '--json_name' to indicate which butch of data you want to use, where json file is store in nonlocalselect_txt folder.

   ./train_nolocalselect_ResNetLSTM.sh
   

5. for training of ResLSTM-Nonlocal backbone, change '--FT_checkpoint' as the previous ResLSTM model stored in results_ResLSTM_Nolocal/roundx/RESLSTM folder.

   ./train_nolocalselect_ResNetLSTM_nolocalFT.sh 
   

6. for testing

   python test_singlenet_phase_+nonlocal.py -c 0 -n model(stored in results_ResLSTM_nolocal/roundx/RESLSTM_NOLOCAL folder)
   

If the code is helpful for your research, please cite our paper.

@inproceedings{shi2020lrtd,
title={LRTD: Long-Range Temporal Dependency based Active Learning for Surgical Workflow Recognition},
author={Xueying Shi, Yueming Jin, Qi Dou, and Pheng-Ann Heng},
year={2020},
booktitle={International Conference on Information Processing in Computer-Assisted Interventions (IPCAI)},
publisher={Springer}
}