README.md

---
dataset_info:
  features:
  - name: image
    dtype: image
  - name: question_id
    dtype: int64
  - name: question
    dtype: string
  - name: answers
    sequence: string
  - name: data_split
    dtype: string
  - name: ocr_results
    struct:
    - name: page
      dtype: int64
    - name: clockwise_orientation
      dtype: float64
    - name: width
      dtype: int64
    - name: height
      dtype: int64
    - name: unit
      dtype: string
    - name: lines
      list:
      - name: bounding_box
        sequence: int64
      - name: text
        dtype: string
      - name: words
        list:
        - name: bounding_box
          sequence: int64
        - name: text
          dtype: string
        - name: confidence
          dtype: string
  - name: other_metadata
    struct:
    - name: ucsf_document_id
      dtype: string
    - name: ucsf_document_page_no
      dtype: string
    - name: doc_id
      dtype: int64
    - name: image
      dtype: string
  splits:
  - name: train
    num_examples: 39463
  - name: validation
    num_examples: 5349
  - name: test
    num_examples: 5188
configs:
- config_name: default
  data_files:
  - split: train
    path: data/train-*
  - split: validation
    path: data/validation-*
  - split: test
    path: data/test-*
license: mit
task_categories:
- question-answering
language:
- en
size_categories:
- 10K<n<100K
---

# Dataset Card for DocVQA Dataset

## Dataset Description

- **Point of Contact from curators:** [Minesh Mathew](mailto:[email protected]), [Dimosthenis Karatzas]([email protected]), [C. V. Jawahar]([email protected])
- **Point of Contact Hugging Face:** [Pablo Montalvo](mailto:[email protected])

### Dataset Summary

DocVQA dataset is a document dataset introduced in Mathew et al. (2021) consisting of 50,000 questions defined on 12,000+ document images. 

Please visit the challenge page (https://rrc.cvc.uab.es/?ch=17) and paper (https://arxiv.org/abs/2007.00398) for further information.

### Usage

This dataset can be used with current releases of Hugging Face `datasets` library. 
Here is an example using a custom collator to bundle batches in a trainable way on the `train` split

```python

from datasets import load_dataset

docvqa_dataset = load_dataset("pixparse/docvqa-single-page-questions", split="train"
)
next(iter(dataset["train"])).keys()
>>> dict_keys(['image', 'question_id', 'question', 'answers', 'data_split', 'ocr_results', 'other_metadata'])
```
`image` will be a byte string containing the image contents. `answers` is a list of possible answers, aligned with the expected inputs to the [ANLS metric](https://arxiv.org/abs/1905.13648).

Calling 

```python
from PIL import Image
from io import BytesIO
image = Image.open(BytesIO(docvqa_dataset["train"][0]["image"]['bytes']))
```
will yield the image

<center>
    <img src="https://huggingface.co/datasets/pixparse/docvqa-single-page-questions/resolve/main/doc_images_docvqa/docvqa_example.png" alt="An example of document available in docVQA" width="600" height="300">
    <p><em>A document overlapping with tobacco on which questions are asked such as 'When is the contract effective date?' with the answer ['7 - 1 - 99']</em></p>
</center>

The loader can then be iterated on normally and yields questions. Many questions rely on the same image, so there is some amount of data duplication.

For this sample 0, the question has just one possible answer, but in general `answers` is a list of strings.

```python
# int identifier of the question

print(dataset["train"][0]['question_id'])
>>> 9951

# actual question

print(dataset["train"][0]['question'])
>>>'When is the contract effective date?'

# one-element list of accepted/ground truth answers for this question

print(dataset["train"][0]['answers'])
>>> ['7 - 1 - 99']
```

`ocr_results` contains OCR information about all files, which can be used for models that don't leverage only the image input.


### Data Splits


#### Train
* 10194 images, 39463 questions and answers.

### Validation

* 1286 images, 5349 questions and answers.

### Test

* 1,287 images,  5,188 questions.
  
## Additional Information

### Dataset Curators

For original authors of the dataset, see citation below.

Hugging Face points of contact for this instance: Pablo Montalvo, Ross Wightman

### Licensing Information

MIT

### Citation Information

```bibtex
@InProceedings{docvqa_wacv,
    author    = {Mathew, Minesh and Karatzas, Dimosthenis and Jawahar, C.V.},
    title     = {DocVQA: A Dataset for VQA on Document Images},
    booktitle = {WACV},
    year      = {2021},
    pages     = {2200-2209}
}
```