transformers/docs/source/en/model_doc/layoutxlm.md

LayoutXLM

Overview

LayoutXLM was proposed in LayoutXLM: Multimodal Pre-training for Multilingual Visually-rich Document Understanding by Yiheng Xu, Tengchao Lv, Lei Cui, Guoxin Wang, Yijuan Lu, Dinei Florencio, Cha Zhang, Furu Wei. It's a multilingual extension of the LayoutLMv2 model trained on 53 languages.

The abstract from the paper is the following:

Multimodal pre-training with text, layout, and image has achieved SOTA performance for visually-rich document understanding tasks recently, which demonstrates the great potential for joint learning across different modalities. In this paper, we present LayoutXLM, a multimodal pre-trained model for multilingual document understanding, which aims to bridge the language barriers for visually-rich document understanding. To accurately evaluate LayoutXLM, we also introduce a multilingual form understanding benchmark dataset named XFUN, which includes form understanding samples in 7 languages (Chinese, Japanese, Spanish, French, Italian, German, Portuguese), and key-value pairs are manually labeled for each language. Experiment results show that the LayoutXLM model has significantly outperformed the existing SOTA cross-lingual pre-trained models on the XFUN dataset.

This model was contributed by nielsr. The original code can be found here.

Usage tips and examples

One can directly plug in the weights of LayoutXLM into a LayoutLMv2 model, like so:

from transformers import LayoutLMv2Model

model = LayoutLMv2Model.from_pretrained("microsoft/layoutxlm-base")

Note that LayoutXLM has its own tokenizer, based on [LayoutXLMTokenizer]/[LayoutXLMTokenizerFast]. You can initialize it as follows:

from transformers import LayoutXLMTokenizer

tokenizer = LayoutXLMTokenizer.from_pretrained("microsoft/layoutxlm-base")

Similar to LayoutLMv2, you can use [LayoutXLMProcessor] (which internally applies [LayoutLMv2ImageProcessor] and [LayoutXLMTokenizer]/[LayoutXLMTokenizerFast] in sequence) to prepare all data for the model.

As LayoutXLM's architecture is equivalent to that of LayoutLMv2, one can refer to LayoutLMv2's documentation page for all tips, code examples and notebooks.

LayoutXLMTokenizer

autodoc LayoutXLMTokenizer - call - build_inputs_with_special_tokens - get_special_tokens_mask - create_token_type_ids_from_sequences - save_vocabulary

LayoutXLMTokenizerFast

autodoc LayoutXLMTokenizerFast - call

LayoutXLMProcessor

autodoc LayoutXLMProcessor - call