Focal Visual-Text Attention for Visual Question Answering

This repository contains the code and models for our CVPR 2018 spotlight paper:

Junwei Liang, Lu Jiang, Liangliang Cao, Li-Jia Li, Alexander Hauptmann
"Focal Visual-Text Attention for Visual Question Answering"
in Proc. CVPR 2018

Example FVTA Output.

If you find the code useful for your research, please cite our paper:

    @inproceedings{liang2018focal,
      title={Focal Visual-Text Attention for Visual Question Answering},
      author={Liang, Junwei and Jiang, Lu and Cao, Liangliang and Li, Li-Jia and Hauptmann, Alexander},
      booktitle={Conference on Computer Vision and Pattern Recognition (CVPR)},
      year={2018}
    }

Dependencies

• Python 2.7; TensorFlow >= 1.4.0; tqdm and nltk (for preprocessing)
• Preprocessed MemexQA data, which you can process yourself with the MemexQA dataset v1.1.
• Pre-trained models from the fvta model zoo. Each extracted model file looks like this:

├── fvta
│   └── 00
│       ├── best
│       │   ├── checkpoint
│       │   ├── save-best-751000.data-00000-of-00001
│       │   ├── save-best-751000.index
│       │   └── save-best-751000.meta
│       ├── shared.p
│       └── test_best
│           └── answers.json

Model

Focal Visual-Text Attention Network.

Code Structure

The main entrance for the code base is main.py. It has two modes: training and testing. It will first load the desired model class from model.py/model_v2.py/model_mcb.py/model_dmnplus.py to contruct the model graph and will attempt to load weights if provided --load/--load_best.

Testing

The testing code assumes the following directory structure. Download the corresponding model file from the model zoo and extract in the models directory. Extract the preprocessed data into the current directory.

DIR/
  *.py
  models/
    model_name/
      00/
        ..
  prepro_v1.1/
    ..

Results as in the paper:

Method	Test Accuracy
DMN+	0.4795
MCB+	0.4623
Soft Attention	0.6208
Soft Attention Bi-directional (BiDAF)	0.5979
TGIF Attention	0.6296
FVTA	0.6686

Abalations	Test Accuracy
FVTA_no_question attention	0.6287
FVTA_no_photo	0.5773
FVTA_no_timewarp	0.6132
FVTA_no_intraseq	0.5691
FVTA_no_crossseq	0.6041
FVTA_cosine	0.6192

1. DMN+

Test accuracy: 0.479513987002

$ python main.py prepro_v1.1/ models/ --modelname dmnplus --batch_size 64 --hidden_size 512 --dmnplus --image_feat_dim 2537 --is_test --load_best

2. MCB

Test accuracy: 0.462277479514

$ python main.py prepro_v1.1/ models/ --modelname mcb --batch_size 64 --hidden_size 200 --image_feat_dim 2537 --use_char --char_emb_size 100 --char_out_size 100 --add_tanh --mcb --mcb_outdim 1024  --is_test  --load_best

3. Soft Attention

Test accuracy: 0.620796835264

$ python main.py prepro_v1.1/ models --modelname soft_att --batch_size 64 --hidden_size 50 --image_feat_dim 2537 --use_image_trans --image_trans_dim 100 --use_direct_links --direct_links_only --use_char --char_emb_size 100 --char_out_size 100 --is_test --use_question_att --simiMatrix 2 --load_best

4. Soft Attention Bi-directional (BiDAF)

Test accuracy: 0.597909013846

$ python main.py prepro_v1.1/ models --modelname soft_att_bidirect --batch_size 64 --hidden_size 50 --image_feat_dim 2537 --use_image_trans --image_trans_dim 100 --use_direct_links --direct_links_only --use_char --char_emb_size 100 --char_out_size 100 --is_test --load_best --use_question_att --simiMatrix 2 --use_bidirect

5. TGIF Attention

Test accuracy: 0.629556371856

$ python main.py prepro_v1.1/ models/ --modelname tgif  --batch_size 64 --hidden_size 50 --image_feat_dim 2537 --use_image_trans --image_trans_dim 100 --use_char --char_emb_size 100 --char_out_size 100 --add_tanh --simiMatrix 2 --use_tgif_ml_att --is_test --load_best

6. FVTA

Test accuracy: 0.668550437977

$ python main.py prepro_v1.1 models/ --modelname fvta --hidden_size 50 --image_feat_dim 2537 --use_image_trans --image_trans_dim 100 --use_char --char_emb_size 100 --char_out_size 100 --add_tanh --simiMatrix 2 --use_question_att --use_3d --use_time_warp --warp_type 5 --is_test --load_best --batch_size 1

7. Abalation Experiments

• FVTA_no_question attention. Test accuracy: 0.628708674767

$ python main.py prepro_v1.1 models/ --modelname fvta_no_qatt --hidden_size 50 --image_feat_dim 2537 --use_image_trans --image_trans_dim 100 --use_char --char_emb_size 100 --char_out_size 100 --add_tanh --simiMatrix 2 --use_3d --use_time_warp --warp_type 5 --is_test --load_best --batch_size 1

• FVTA_no_photo. Test accuracy: 0.577281717999

$ python main.py prepro_v1.1 models/ --modelname fvta_no_photo --hidden_size 50 --image_feat_dim 2537 --use_image_trans --image_trans_dim 100 --use_char --char_emb_size 100 --char_out_size 100 --add_tanh --simiMatrix 2 --use_question_att --use_3d --use_time_warp --warp_type 5 --is_test --load_best --batch_size 1 --no_photo

• FVTA_no_timewarp. Test accuracy: 0.613167561458

$ python main.py prepro_v1.1 models/ --modelname fvta_notimewarp --hidden_size 50 --image_feat_dim 2537 --use_image_trans --image_trans_dim 100 --use_char --char_emb_size 100 --char_out_size 100 --add_tanh --simiMatrix 2 --use_question_att --use_3d --is_test --load_best --batch_size 32

• FVTA_no_intraseq. Test accuracy: 0.5690873128

$ python main.py prepro_v1.1/ models/ --modelname fvta_no_intraseq --batch_size 64 --hidden_size 50 --image_feat_dim 2537 --use_image_trans --image_trans_dim 100 --use_char --char_emb_size 100 --char_out_size 100 --use_mm_att --simiMatrix 2 --use_question_att --is_test --load_best

• FVTA_no_crossseq. Test accuracy: 0.604125459169

$ python main.py prepro_v1.1/ models/ --modelname fvta_no_crossseq --batch_size 64 --hidden_size 50 --image_feat_dim 2537 --use_image_trans --image_trans_dim 100 --use_char --char_emb_size 100 --char_out_size 100 --use_ml_att --simiMatrix 2 --use_question_att --is_test --load_best

• FVTA cosine. Test accuracy: 0.619666572478

$ python main.py prepro_v1.1 models/ --modelname fvta_cosine --hidden_size 50 --image_feat_dim 2537 --use_image_trans --image_trans_dim 100 --use_char --char_emb_size 100 --char_out_size 100 --add_tanh --simiMatrix 4 --use_question_att --use_3d --use_time_warp --warp_type 5 --is_test --load_best --batch_size 1

Evaluation

After running the testing code, it will output the accuracy on test set, and save the answers in model_name/00/test_best/answers.json. You can use the following code to get more detailed evaluation. Need the MemexQA v1.1 dataset

$ python evaluate-v0.1.py memexqa_dataset_v1.1/qas.json memexqa_dataset_v1.1/test_question.ids models/fvta/00/test_best/answers.json --bucket memexqa_dataset_v1.1/qatype.bucket.json
got 3539 ground truth qa
Overall acc: 0.668550437977 (2366/3539)
        group how: 0.761336515513 (319/419)
        group what: 0.713611859838 (1059/1484)
        group when: 0.476439790576 (273/573)
        group where: 0.675986842105 (411/608)
        group who: 0.668131868132 (304/455)
how what when where who overall
0.761336515513 0.713611859838 0.476439790576 0.675986842105 0.668131868132 0.668550437977

Training

Train the FVTA model:

$ python main.py prepro_v1.1 models/ --modelname fvta_newtrain --hidden_size 50 --image_feat_dim 2537 --use_image_trans --image_trans_dim 100 --use_char --char_emb_size 100 --char_out_size 100 --add_tanh --simiMatrix 2 --use_question_att --use_3d --num_albums_thres 4 --num_photos_thres 8 --sent_des_size_thres 10 --sent_album_title_size_thres 8 --sent_photo_title_size_thres 8 --use_time_warp --warp_type 5 --is_train --batch_size 6 --val_num_batches 2000 --save_period 1000 --num_epochs 200 --init_lr 0.5

This will take about 50 hours with a TITAN X GPU using about 9GB GPU memory. All other models are also train with the following hyperparameters, with different batch_size depending on whether it could fit in the GPU:

--batch_size 6 --val_num_batches 2000 --save_period 1000 --num_epochs 200 --init_lr 0.5 --num_albums_thres 4 --num_photos_thres 8 --sent_des_size_thres 10 --sent_album_title_size_thres 8 --sent_photo_title_size_thres 8

Preprocess data

1. Download MemexQA dataset v1.1 from here

2. Run the code at the same directory

   $ python preprocess.py memexqa_dataset_v1.1/qas.json memexqa_dataset_v1.1/album_info.json memexqa_dataset_v1.1/test_question.ids memexqa_dataset_v1.1/photos_inception_resnet_v2_l2norm.npz memexqa_dataset_v1.1/glove.6B.100d.txt prepro_v1.1