Omegat pdf file manual#
Omegat pdf file download#

The only drawback of the pre-alignment is that the alignment time increases exponentially with the document size, luckily our documents aren't too long. Its alignment UI is very similar to LF Aligner and very functional. OmegaT does very well on the PDF text extraction and pre-alignment.

To compensate for this, we first convert the PDF files to plain text using Microsoft Word and then align the plain text files using LF Aligner 4.1: It falters a bit in the text extraction of our PDF files. We use LF Aligner, which is quite good for the automated pre-alignment and has a good alignment UI. Fortunately we can use the data set we produce here to evaluate automated sentence alignment! For the alignment of larger corpora needed for MT training we need fully automated sentence alignment which we'll cover in a future post.

Omegat pdf file manual#

Even if an alignment tool is great in all three factors, manual alignment is most likely only cost efficient for small data sets, such as the MT evaluation data we are creating. A user interface that allows to efficiently review and correct the automatic pre-alignmentĪny of these three factors has a big impact on the work required.High-quality automated sentence pre-alignment to reduce the manual alignment work.High-quality extraction of text and text flow from the PDF.To manually align the data without spending too much time we need three things from the alignment tool: In no particular order: commercial tools like Terminotix Document Alignment Tools, SDL Trados Studio and Stingray Document Aligner and open source tools like OmegaT, LF Aligner and bitext2tmx. There are quite a few options to align translated pairs of PDF files. As long as we don't have to translate historical documents, the more recent documents are more relevant for our evaluation anyway. We are more lucky with the formatting of more recent PDFs from this century and can extract parallel data from them with the help of alignment tools. Only some of the scanned documents contain text extracted with OCR and quite a bit of the OCRed text contains errors.

Omegat pdf file download#

From the OKR category ' German PDFs Available' we download the German PDFs and, where available, their English source documents.Ī first look with a PDF reader like Adobe Acrobat Reader DC shows that some of these PDFs are scanned paper documents, like a 1980 address of the former head of the World Bank president Robert McNamara (who's life is chronicled in the documentary The Fog of War). Most of the World Bank Open Knowledge Repository is generously licensed under Creative Commons licenses, so we can download, transform, use and publish content as long as we comply with the licenses. In the next blog post we use this evaluation data to evaluate the translation quality of different MT systems using automated metrics.ĭownloading World Bank Open Knowledge Repository PDF Files In this blog post we create such evaluation data from the PDFs by extracting the text and manually aligning the sentences. To evaluate machine translation objectively with automated metrics like BLEU we need about 1000 to 2000 aligned, high-quality translated sentences that are representative of the material we intent to translate. We do have access to some translated PDF files in English and German from years past, but unfortunately no access to a translation memory. Imagine we are a translation provider for an organization like the World Bank, we heard about this new technology of neural machine translation and we would like to try out how well this works for the materials we have to translate.