deepdoctection 0.20

Repository for Document AI

A Document AI Package

deepdoctection is a Python library that orchestrates document extraction and document layout analysis tasks using deep learning models. It does not implement models but enables you to build pipelines using highly acknowledged libraries for object detection, OCR and selected NLP tasks and provides an integrated framework for fine-tuning, evaluating and running models. For more specific text processing tasks use one of the many other great NLP libraries.

deepdoctection focuses on applications and is made for those who want to solve real world problems related to document extraction from PDFs or scans in various image formats.

Check the demo of a document layout analysis pipeline with OCR on :hugs: Hugging Face spaces.

Overview

deepdoctection provides model wrappers of supported libraries for various tasks to be integrated into pipelines. Its core function does not depend on any specific deep learning library. Selected models for the following tasks are currently supported:

• Document layout analysis including table recognition in Tensorflow with Tensorpack, or PyTorch with Detectron2,
• OCR with support of Tesseract, DocTr (Tensorflow and PyTorch implementations available) and a wrapper to an API for a commercial solution,
• Text mining for native PDFs with pdfplumber,
• Language detection with fastText,
• Deskewing and rotating images with jdeskew.
• [new!] Document and token classification with all LayoutLM models provided by the Transformer library. (Yes, you can use any LayoutLM-model with any of the provided OCR-or pdfplumber tools straight away!)

deepdoctection provides on top of that methods for pre-processing inputs to models like cropping or resizing and to post-process results, like validating duplicate outputs, relating words to detected layout segments or ordering words into contiguous text. You will get an output in JSON format that you can customize even further by yourself.

Have a look at the introduction notebook in the notebook repo for an easy start.

Check the release notes for recent updates.

Models

deepdoctection or its support libraries provide pre-trained models that are in most of the cases available at the Hugging Face Model Hub or that will be automatically downloaded once requested. For instance, you can find pre-trained object detection models from the Tensorpack or Detectron2 framework for coarse layout analysis, table cell detection and table recognition.

Datasets and training scripts

Training is a substantial part to get pipelines ready on some specific domain, let it be document layout analysis, document classification or NER. deepdoctection provides training scripts for models that are based on trainers developed from the library that hosts the model code. Moreover, deepdoctection hosts code to some well established datasets like Publaynet that makes it easy to experiment. It also contains mappings from widely used data formats like COCO and it has a dataset framework (akin to datasets so that setting up training on a custom dataset becomes very easy. This notebook shows you how to do this.

Evaluation

deepdoctection comes equipped with a framework that allows you to evaluate predictions of a single or multiple models in a pipeline against some ground truth. Check again here how it is done.

Inference

Having set up a pipeline it takes you a few lines of code to instantiate the pipeline and after a for loop all pages will be processed through the pipeline.

import deepdoctection as dd
from IPython.core.display import HTML
from matplotlib import pyplot as plt

analyzer = dd.get_dd_analyzer()  # instantiate the built-in analyzer similar to the Hugging Face space demo

df = analyzer.analyze(path = "/path/to/your/doc.pdf")  # setting up pipeline
df.reset_state()                 # Trigger some initialization

doc = iter(df)
page = next(doc) 

image = page.viz()
plt.figure(figsize = (25,17))
plt.axis('off')
plt.imshow(image)

HTML(page.tables[0].html)

print(page.get_text())

Documentation

There is an extensive documentation available containing tutorials, design concepts and the API. We want to present things as comprehensively and understandably as possible. However, we are aware that there are still many areas where significant improvements can be made in terms of clarity, grammar and correctness. We look forward to every hint and comment that increases the quality of the documentation.

Requirements

Everything in the overview listed below the deepdoctection layer are necessary requirements and have to be installed separately.

• Linux or macOS. Windows is not supported.
• Python >= 3.8
• PyTorch >= 1.8 or Tensorflow >= 2.8 and CUDA. If you want to run the models provided by Tensorpack a GPU is required. You can run on PyTorch with a CPU only.
• deepdoctection uses Python wrappers for Poppler to convert PDF documents into images.
• With respect to the Deep Learning framework, you must decide between Tensorflow and PyTorch.
• Tesseract OCR engine will be used through a Python wrapper. The core engine has to be installed separately.

Installation

We recommend using a virtual environment. You can install the package via pip or from source. Bug fixes or enhancements will be deployed to PyPi every 4 to 6 weeks.

Install with pip from PyPi

Depending on which Deep Learning library you have available, use the following installation option:

For Tensorflow, run

pip install deepdoctection[tf]

For PyTorch,

first install Detectron2 separately as it is not distributed via PyPi. Check the instruction here. Then run

pip install deepdoctection[pt]

This will install deepdoctection with all dependencies listed above the deepdoctection layer. Use this setting, if you want to get started or want to explore all features.

If you want to have more control with your installation and are looking for fewer dependencies then install deepdoctection with the basic setup only.

pip install deepdoctection

This will ignore all model libraries (layers above the deepdoctection layer in the diagram) and you will be responsible to install them by yourself. Note, that you will not be able to run any pipeline with this setup.

For further information, please consult the full installation instructions.

Installation from source

Download the repository or clone via

git clone https://github.com/deepdoctection/deepdoctection.git

To get started with Tensorflow, run:

cd deepdoctection
pip install ".[tf]"

Installing the full PyTorch setup from source will also install Detectron2 for you:

cd deepdoctection
pip install ".[source-pt]"

Credits

We thank all libraries that provide high quality code and pre-trained models. Without, it would have been impossible to develop this framework.

Problems

We try hard to eliminate bugs. We also know that the code is not free of issues. We welcome all issues relevant to this repo and try to address them as quickly as possible.

If you like deepdoctection ...

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License

Distributed under the Apache 2.0 License. Check LICENSE for additional information.