Introduction

Donut 🍩, Document understanding transformer, is a new method of document understanding that utilizes an OCR-free end-to-end Transformer model. Donut does not require off-the-shelf OCR engines/APIs, yet it shows state-of-the-art performances on various visual document understanding tasks, such as visual document classification or information extraction (a.k.a. document parsing). In addition, we present SynthDoG 🐶, Synthetic Document Generator, that helps the model pre-training to be flexible on various languages and domains.

Our academic paper, which describes our method in detail and provides full experimental results and analyses, can be found here:

OCR-free Document Understanding Transformer.
Geewook Kim, Teakgyu Hong, Moonbin Yim, JeongYeon Nam, Jinyoung Park, Jinyeong Yim, Wonseok Hwang, Sangdoo Yun, Dongyoon Han, Seunghyun Park. In ECCV 2022.

Pre-trained Models and Web Demos

Gradio web demos are available! |:--:| ||

• You can run the demo with ./app.py file.
• Sample images are available at ./misc and more receipt images are available at CORD dataset link.
• Web demos are available from the links in the following table.
• Note: We have updated the Google Colab demo (as of June 15, 2023) to ensure its proper working.

The links to the pre-trained backbones are here:

• donut-base: trained with 64 A100 GPUs (~2.5 days), number of layers (encoder: {2,2,14,2}, decoder: 4), input size 2560x1920, swin window size 10, IIT-CDIP (11M) and SynthDoG (English, Chinese, Japanese, Korean, 0.5M x 4).
• donut-proto: (preliminary model) trained with 8 V100 GPUs (~5 days), number of layers (encoder: {2,2,18,2}, decoder: 4), input size 2048x1536, swin window size 8, and SynthDoG (English, Japanese, Korean, 0.4M x 3).

Please see our paper for more details.

SynthDoG datasets

The links to the SynthDoG-generated datasets are here:

• synthdog-en: English, 0.5M.
• synthdog-zh: Chinese, 0.5M.
• synthdog-ja: Japanese, 0.5M.
• synthdog-ko: Korean, 0.5M.

To generate synthetic datasets with our SynthDoG, please see ./synthdog/README.md and our paper for details.

Updates

2023-06-15 We have updated all Google Colab demos to ensure its proper working.
2022-11-14 New version 1.0.9 is released (pip install donut-python --upgrade). See 1.0.9 Release Notes.
2022-08-12 Donut 🍩 is also available at huggingface/transformers 🤗 (contributed by @NielsRogge). donut-python loads the pre-trained weights from the official branch of the model repositories. See 1.0.5 Release Notes.
2022-08-05 A well-executed hands-on tutorial on donut 🍩 is published at Towards Data Science (written by @estaudere).
2022-07-20 First Commit, We release our code, model weights, synthetic data and generator.

Software installation

pip install donut-python

or clone this repository and install the dependencies:

git clone https://github.com/clovaai/donut.git
cd donut/
conda create -n donut_official python=3.7
conda activate donut_official
pip install .

We tested donut-python == 1.0.1 with:

• torch == 1.11.0+cu113
• torchvision == 0.12.0+cu113
• pytorch-lightning == 1.6.4
• transformers == 4.11.3
• timm == 0.5.4

Note: From several reported issues, we have noticed increased challenges in configuring the testing environment for donut-python due to recent updates in key dependency libraries. While we are actively working on a solution, we have updated the Google Colab demo (as of June 15, 2023) to ensure its proper working. For assistance, we encourage you to refer to the following demo links: CORD Colab Demo, Train Ticket Colab Demo, RVL-CDIP Colab Demo, DocVQA Colab Demo.

Getting Started

Data

This repository assumes the following structure of dataset:

> tree dataset_name
dataset_name
├── test
│   ├── metadata.jsonl
│   ├── {image_path0}
│   ├── {image_path1}
│             .
│             .
├── train
│   ├── metadata.jsonl
│   ├── {image_path0}
│   ├── {image_path1}
│             .
│             .
└── validation
    ├── metadata.jsonl
    ├── {image_path0}
    ├── {image_path1}
              .
              .

> cat dataset_name/test/metadata.jsonl
{"file_name": {image_path0}, "ground_truth": "{\"gt_parse\": {ground_truth_parse}, ... {other_metadata_not_used} ... }"}
{"file_name": {image_path1}, "ground_truth": "{\"gt_parse\": {ground_truth_parse}, ... {other_metadata_not_used} ... }"}
     .
     .

• The structure of metadata.jsonl file is in JSON Lines text format, i.e., .jsonl. Each line consists of
  • file_name : relative path to the image file.
  • ground_truth : string format (json dumped), the dictionary contains either gt_parse or gt_parses. Other fields (metadata) can be added to the dictionary but will not be used.
• donut interprets all tasks as a JSON prediction problem. As a result, all donut model training share a same pipeline. For training and inference, the only thing to do is preparing gt_parse or gt_parses for the task in format described below.

For Document Classification

The gt_parse follows the format of {"class" : {class_name}}, for example, {"class" : "scientific_report"} or {"class" : "presentation"}.

• Google colab demo is available here.
• Gradio web demo is available here.

For Document Information Extraction

The gt_parse is a JSON object that contains full information of the document image, for example, the JSON object for a receipt may look like {"menu" : [{"nm": "ICE BLACKCOFFEE", "cnt": "2", ...}, ...], ...}.

• More examples are available at CORD dataset.
• Google colab demo is available here.
• Gradio web demo is available here.

For Document Visual Question Answering

The gt_parses follows the format of [{"question" : {question_sentence}, "answer" : {answer_candidate_1}}, {"question" : {question_sentence}, "answer" : {answer_candidate_2}}, ...], for example, [{"question" : "what is the model name?", "answer" : "donut"}, {"question" : "what is the model name?", "answer" : "document understanding transformer"}].

• DocVQA Task1 has multiple answers, hence gt_parses should be a list of dictionary that contains a pair of question and answer.
• Google colab demo is available here.
• Gradio web demo is available here.

For (Pseudo) Text Reading Task

The gt_parse looks like {"text_sequence" : "word1 word2 word3 ... "}

• This task is also a pre-training task of Donut model.
• You can use our SynthDoG 🐶 to generate synthetic images for the text reading task with proper gt_parse. See ./synthdog/README.md for details.

Training

This is the configuration of Donut model training on CORD dataset used in our experiment. We ran this with a single NVIDIA A100 GPU.

python train.py --config config/train_cord.yaml \
                --pretrained_model_name_or_path "naver-clova-ix/donut-base" \
                --dataset_name_or_paths '["naver-clova-ix/cord-v2"]' \
                --exp_version "test_experiment"    
  .
  .                                                                                                                                                                                                                                         
Prediction: <s_menu><s_nm>Lemon Tea (L)</s_nm><s_cnt>1</s_cnt><s_price>25.000</s_price></s_menu><s_total><s_total_price>25.000</s_total_price><s_cashprice>30.000</s_cashprice><s_changeprice>5.000</s_changeprice></s_total>
Answer: <s_menu><s_nm>Lemon Tea (L)</s_nm><s_cnt>1</s_cnt><s_price>25.000</s_price></s_menu><s_total><s_total_price>25.000</s_total_price><s_cashprice>30.000</s_cashprice><s_changeprice>5.000</s_changeprice></s_total>
Normed ED: 0.0
Prediction: <s_menu><s_nm>Hulk Topper Package</s_nm><s_cnt>1</s_cnt><s_price>100.000</s_price></s_menu><s_total><s_total_price>100.000</s_total_price><s_cashprice>100.000</s_cashprice><s_changeprice>0</s_changeprice></s_total>
Answer: <s_menu><s_nm>Hulk Topper Package</s_nm><s_cnt>1</s_cnt><s_price>100.000</s_price></s_menu><s_total><s_total_price>100.000</s_total_price><s_cashprice>100.000</s_cashprice><s_changeprice>0</s_changeprice></s_total>
Normed ED: 0.0
Prediction: <s_menu><s_nm>Giant Squid</s_nm><s_cnt>x 1</s_cnt><s_price>Rp. 39.000</s_price><s_sub><s_nm>C.Finishing - Cut</s_nm><s_price>Rp. 0</s_price><sep/><s_nm>B.Spicy Level - Extreme Hot Rp. 0</s_price></s_sub><sep/><s_nm>A.Flavour - Salt & Pepper</s_nm><s_price>Rp. 0</s_price></s_sub></s_menu><s_sub_total><s_subtotal_price>Rp. 39.000</s_subtotal_price></s_sub_total><s_total><s_total_price>Rp. 39.000</s_total_price><s_cashprice>Rp. 50.000</s_cashprice><s_changeprice>Rp. 11.000</s_changeprice></s_total>
Answer: <s_menu><s_nm>Giant Squid</s_nm><s_cnt>x1</s_cnt><s_price>Rp. 39.000</s_price><s_sub><s_nm>C.Finishing - Cut</s_nm><s_price>Rp. 0</s_price><sep/><s_nm>B.Spicy Level - Extreme Hot</s_nm><s_price>Rp. 0</s_price><sep/><s_nm>A.Flavour- Salt & Pepper</s_nm><s_price>Rp. 0</s_price></s_sub></s_menu><s_sub_total><s_subtotal_price>Rp. 39.000</s_subtotal_price></s_sub_total><s_total><s_total_price>Rp. 39.000</s_total_price><s_cashprice>Rp. 50.000</s_cashprice><s_changeprice>Rp. 11.000</s_changeprice></s_total>
Normed ED: 0.039603960396039604                                                                                                                                  
Epoch 29: 100%|█████████████| 200/200 [01:49<00:00,  1.82it/s, loss=0.00327, exp_name=train_cord, exp_version=test_experiment]

Some important arguments:

• --config : config file path for model training.
• --pretrained_model_name_or_path : string format, model name in Hugging Face modelhub or local path.
• --dataset_name_or_paths : string format (json dumped), list of dataset names in Hugging Face datasets or local paths.
• --result_path : file path to save model outputs/artifacts.
• --exp_version : used for experiment versioning. The output files are saved at {result_path}/{exp_version}/*

Test

With the trained model, test images and ground truth parses, you can get inference results and accuracy scores.

python test.py --dataset_name_or_path naver-clova-ix/cord-v2 --pretrained_model_name_or_path ./result/train_cord/test_experiment --save_path ./result/output.json
100%|█████████████| 100/100 [00:35<00:00,  2.80it/s]
Total number of samples: 100, Tree Edit Distance (TED) based accuracy score: 0.9129639764131697, F1 accuracy score: 0.8406020841373987

Some important arguments:

• --dataset_name_or_path : string format, the target dataset name in Hugging Face datasets or local path.
• --pretrained_model_name_or_path : string format, the model name in Hugging Face modelhub or local path.
• --save_path: file path to save predictions and scores.

How to Cite

If you find this work useful to you, please cite:

@inproceedings{kim2022donut,
  title     = {OCR-Free Document Understanding Transformer},
  author    = {Kim, Geewook and Hong, Teakgyu and Yim, Moonbin and Nam, JeongYeon and Park, Jinyoung and Yim, Jinyeong and Hwang, Wonseok and Yun, Sangdoo and Han, Dongyoon and Park, Seunghyun},
  booktitle = {European Conference on Computer Vision (ECCV)},
  year      = {2022}
}

License

MIT license

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