NSVD

This repository contains the official code of the paper:

Neuro-Symbolic Visual Dialog [PDF]

Adnen Abdessaied, Mihai Bace, Andreas Bulling
Oral Presentation
International Conferenc on Computational Linguistics (COLING), 2022 / Gyeongju, Republic of Korea 🇰🇷

If you find our code useful or use it in your own projects, please cite our paper:

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Abstract

We propose Neuro-Symbolic Visual Dialog (NSVD) —the first method to combine deep learning and symbolic program execution for multi-round visually-grounded reasoning. NSVD significantly outperforms existing purely-connectionist methods on two key challenges inherent to visual dialog: long-distance co-reference resolution as well as vanishing question-answering performance. We demonstrate the latter by proposing a more realistic and stricter evaluation scheme in which we use predicted answers for the full dialog history when calculating accuracy. We describe two variants of our model and show that using this new scheme, our best model achieves an accuracy of 99.72% on CLEVR-Dialog —a relative improvement of more than 10% over the state of the art —while only requiring a fraction of training data. Moreover, we demonstrate that our neuro-symbolic models have a higher mean first failure round, are more robust against incomplete dialog histories, and generalise better not only to dialogs that are up to three times longer than those seen during training but also to unseen question types and scenes.

Method

Overview of our method NSVD.

Overview of concat and stack encoders.

Requirements

• PyTorch 1.3.1
• Python 3.6
• Ubuntu 18.04

Raw Data

Scene Data

We used CLEVR and Minecraft images in this project. The raw images have a large footprint and we won't upload them. However, we provide their json file as well as their derendedred versions:

• Original clevr-dialog training and validation raw scenes: ⬇
• Raw scenes we used in our experiments: ⬇
• All derendered scenes: ⬇

Dialog Data

The dialog data we used can be found here ⬇
You can also create your own data using the generate_dataset.py script.

Preprocessing

Scenes

The derendered scenes do not need any further preprocessing and can be directly used with our neuro-symbolic executor.

Dialogs

To preprocess the dialogs, follow these steps:

cd preprocess_dialogs

For the stack encoder, execute

python preprocess.py --input_dialogs_json <path_to_raw_dialog_file> --input_vocab_json '' --output_vocab_json <path_where_to_save_the_vocab> --output_h5_file <path_of_the_output_file> --split <train/val/test> --mode stack

For the concat encoder, execute

python preprocess.py --input_dialogs_json <path_to_raw_dialog_file> --input_vocab_json '' --output_vocab_json <path_where_to_save_the_vocab> --output_h5_file <path_of_the_output_file> --split <train/val/test> --mode concat

Training

First, change directory

cd ../prog_generator

Caption Program Parser

To train the caption parser, execute

python train_caption_parser.py --mode train --run_dir <experiment_dir> --res_path <path_to_store_results> --dataPathTr <path_to_preprocessed_training_data> --dataPathVal <path_to_preprocessed_val_data> --dataPathTest <path_to_preprocessed_test_data> --vocab_path <path_where_to_save_the_vocab>

Question Program Parser

To train the question program parser with the stack encoder, execute

python train_question_parser.py --mode train --run_dir <experiment_dir> --text_log_dir <log_dir_path> --dataPathTr <path_to_preprocessed_training_data> --dataPathVal <path_to_preprocessed_val_data> --dataPathTest <path_to_preprocessed_test_data> --scenePath <path_to_derendered_scenes> --vocab_path <path_where_to_save_the_vocab> --encoder_type 2

To train the question program parser with the concat encoder, execute

python train_question_parser.py --mode train --run_dir <experiment_dir> --text_log_dir <log_dir_path> --dataPathTr <path_to_preprocessed_training_data> --dataPathVal <path_to_preprocessed_val_data> --dataPathTest <path_to_preprocessed_test_data> --scenePath <path_to_derendered_scenes> --vocab_path <path_where_to_save_the_vocab> --encoder_type 1

Baselines

• MAC-XXX

• HCN

Evaluation

To evaluate using the Hist+GT scheme, execute

python train_question_parser.py --mode test_with_gt --run_dir <experiment_dir> --text_log_dir <log_dir_path> --dataPathTr <path_to_preprocessed_training_data> --dataPathVal <path_to_preprocessed_val_data> --dataPathTest <path_to_preprocessed_test_data> --scenePath <path_to_derendered_scenes> --vocab_path <path_where_to_save_the_vocab> --encoder_type <1/2> --questionNetPath <path_to_pretrained_question_parser> --captionNetPath <path_to_pretrained_caption_parser> --dialogLen <total_number_of_dialog_rounds> --last_n_rounds <number_of_last_rounds_to_considered_in_history>

To evaluate using the Hist+Pred scheme, execute

python train_question_parser.py --mode test_with_pred --run_dir <experiment_dir> --text_log_dir <log_dir_path> --dataPathTr <path_to_preprocessed_training_data> --dataPathVal <path_to_preprocessed_val_data> --dataPathTest <path_to_preprocessed_test_data> --scenePath <path_to_derendered_scenes> --vocab_path <path_where_to_save_the_vocab> --encoder_type <1/2> --questionNetPath <path_to_pretrained_question_parser> --captionNetPath <path_to_pretrained_caption_parser> --dialogLen <total_number_of_dialog_rounds> --last_n_rounds <number_of_last_rounds_to_considered_in_history>

Results

We achieve new state-of-the-art performance on clevr-dialog.

Hist+GT

Model	Accurcy	NFFR
MAC-CQ	97.34	0.92
+ CAA	97.87	0.94
+ MTM	97.58	0.92
HCN	75.88	0.34
NSVD-concat (Ours)	99.59	0.98
NSVD-stack (Ours)	99.72	0.99

Hist+Pred

Model	Accurcy	NFFR
MAC-CQ	41.10	0.15
+ CAA	89.39	0.75
+ MTM	70.39	0.46
HCN	74.42	0.32
NSVD-concat (Ours)	99.59	0.98
NSVD-stack (Ours)	99.72	0.99

We refer to our paper for more results and experiments.

Acknowledgements

We thank Ahmed Shah for his MAC-XXX implemetation, Junki Ohmura for his HCN implemantation, Jiayuan Mao for providing us with the minecraft images, and finally Satwik Kottur for his clevr-dialog codebase.

Contributors

• Adnen Abdessaied

For any questions or enquiries, don't hesitate to contact the above contributor.