Extraction of key value pairs from invoices

The model is to extract data from documents such as invoices. Since the documents from different customers have a heterogeneous layout, an AI model must be used for pattern recognition. So-called transformers are used for this. These are machine learning models that roughly consist of two blocks, an encoder whose task is to understand the read text and a decoder that generates new text based on input data. The specific task of data extraction here requires only one encoder.