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license: cc-by-4.0
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# OJ4OCRMT: A Large Multilingual Dataset for OCR-MT Evaluation
[Paul McNamee, Kevin Duh, Cameron Carpenter, Ron Colaianni, Nolan King, and Kenton Murray. *Proceedings of Machine Translation Summit XX, Vol. 1: Research Track* June 23-27, 2025, Geneva, Switzerland.](https://aclanthology.org/2025.mtsummit-1.9/)
The OJ4OCRMT dataset contains source PDF files, rendered images in
three resolutions, and text files (both raw extractions, and
sentence-boundary split files). There are two partitions, 'dev'
and 'test'. Each contains over 1,000 pages of content, with
the PDFs, PNGs, and text files available in 23 EU languages.
The dataset is designed to support evaluating systems for translation
of document images between any pair of 23 European languages.
The dev partition contains 1,656 pages from 2022. Of these 1,412
(85%) are deemed regular; 193 (12%) contain a table; and, 51 (3%)
contain a 'figure'. The test partition contains 1,119 pages, all from
2023. 979 (87%) are regular; 98 (9%) contain a table; and, 42 (4%)
contain a 'figure'. Note, all 2,772 pages have translations in all 23
languages. The languages are: Bulgarian, Croatian, Czech, Danish,
Dutch, English, Estonian, Finnish, French, German, Greek, Hungarian,
Italian, Latvian, Lithuanian, Maltese, Polish, Portuguese, Romanian,
Slovak, Slovene, Spanish, and Swedish. See the published paper for
details about the dataset.
Each page is identified by a document identifier and a page number.
For example, OJ:C:2022:240 is a document identifier. And page 22 of
that document is available in the dev set. At the time of publication
this URL gives access to that page online:
https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=OJ:C:2022:240:FULL#page=22
For the page identified above, the released dataset contains:
- (a) raw: text obtained from the 'pdftotext' command
dev/OJ:C:2022:240/raw/OJ:C:2022:240:FULL.en.p-22.txt
- (b) sbd: normalized text obtained by cleaning the raw text and performing sentence splitting
dev/OJ:C:2022:240/sbd/OJ:C:2022:240:FULL.en.p-22.txt
- (c) png72: a PNG image file at 72 dpi resolution
dev/OJ:C:2022:240/png72/OJ:C:2022:240:FULL.en.p-22.png
- (d) png150: a PNG image file at 150 dpi resolution
dev/OJ:C:2022:240/png150/OJ:C:2022:240:FULL.en.p-22.png
- (e) png300: a PNG image file at 300 dpi resolution
dev/OJ:C:2022:240/png300/OJ:C:2022:240:FULL.en.p-22.png
- (f) pdf: a PDF file obtained from the EUR-Lex online portal and using 'pdfseparate'
dev/OJ:C:2022:240/pdf/OJ:C:2022:240:FULL.en.p-22.pdf
Splits for the partitions are in TSV format with two-columns:
docid [tab] page
The eight split files are named {dev,test}.{all,regular,table.figure}.txt
*Initial release: 6/16/2025* |