docling/docs/examples/translate.py

import logging
import time
from pathlib import Path

from docling_core.types.doc import ImageRefMode, PictureItem, TableItem, TextItem

from docling.datamodel.base_models import FigureElement, InputFormat, Table
from docling.datamodel.pipeline_options import PdfPipelineOptions
from docling.document_converter import DocumentConverter, PdfFormatOption

_log = logging.getLogger(__name__)

IMAGE_RESOLUTION_SCALE = 2.0


# FIXME: put in your favorite translation code ....
def translate(text: str, src: str = "en", dest: str = "de"):

    _log.warning("!!! IMPLEMENT HERE YOUR FAVORITE TRANSLATION CODE!!!")
    # from googletrans import Translator

    # Initialize the translator
    # translator = Translator()

    # Translate text from English to German
    # text = "Hello, how are you?"
    # translated = translator.translate(text, src="en", dest="de")

    return text


def main():
    logging.basicConfig(level=logging.INFO)

    input_doc_path = Path("./tests/data/2206.01062.pdf")
    output_dir = Path("scratch")

    # Important: For operating with page images, we must keep them, otherwise the DocumentConverter
    # will destroy them for cleaning up memory.
    # This is done by setting PdfPipelineOptions.images_scale, which also defines the scale of images.
    # scale=1 correspond of a standard 72 DPI image
    # The PdfPipelineOptions.generate_* are the selectors for the document elements which will be enriched
    # with the image field
    pipeline_options = PdfPipelineOptions()
    pipeline_options.images_scale = IMAGE_RESOLUTION_SCALE
    pipeline_options.generate_page_images = True
    pipeline_options.generate_picture_images = True

    doc_converter = DocumentConverter(
        format_options={
            InputFormat.PDF: PdfFormatOption(pipeline_options=pipeline_options)
        }
    )

    start_time = time.time()

    conv_res = doc_converter.convert(input_doc_path)
    conv_doc = conv_res.document

    # Save markdown with embedded pictures in original text
    md_filename = output_dir / f"{doc_filename}-with-images-orig.md"
    conv_doc.save_as_markdown(md_filename, image_mode=ImageRefMode.EMBEDDED)

    for element, _level in conv_res.document.iterate_items():
        if isinstance(element, TextItem):
            element.orig = element.text
            element.text = translate(text=element.text)

        elif isinstance(element, TableItem):
            for cell in element.data.table_cells:
                cell.text = translate(text=element.text)

    # Save markdown with embedded pictures in translated text
    md_filename = output_dir / f"{doc_filename}-with-images-translated.md"
    conv_doc.save_as_markdown(md_filename, image_mode=ImageRefMode.EMBEDDED)