Sirvi Autor "Enstad, Tita" järgi

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Comparative analysis of optical character recognition methods for Sámi texts from the National Library of Norway
(University of Tartu Library, 2025-03) Enstad, Tita; Trosterud, Trond; Røsok, Marie Iversdatter; Beyer, Yngvil; Roald, Marie; Johansson, Richard; Stymne, Sara
Optical Character Recognition (OCR) is crucial to the National Library of Norway’s (NLN) digitisation process as it converts scanned documents into machine-readable text. However, for the Sámi documents in NLN's collection, the OCR accuracy is insufficient. Given that OCR quality affects downstream processes, evaluating and improving OCR for text written in Sámi languages is necessary to make these resources accessible. To address this need, this work fine-tunes and evaluates three established OCR approaches, Transkribus, Tesseract and TrOCR, for transcribing Sámi texts from NLN's collection. Our results show that Transkribus and TrOCR outperform Tesseract on this task, while Tesseract achieves superior performance on an out-of-domain dataset. Furthermore, we show that fine-tuning pre-trained models and supplementing manual annotations with machine annotations and synthetic text images can yield accurate OCR for Sámi languages, even with a moderate amount of manually annotated data.
The Impact of Copyrighted Material on Large Language Models: A Norwegian Perspective
(University of Tartu Library, 2025-03) Rosa, Javier de la; Mikhailov, Vladislav; Zhang, Lemei; Wetjen, Freddy; Samuel, David; Liu, Peng; Braaten, Rolv-Arild; Mæhlum, Petter; Birkenes, Magnus Breder; Kutuzov, Andrey; Enstad, Tita; Farsethås, Hans Christian; Brygfjeld, Svein Arne; Gulla, Jon Atle; Oepen, Stephan; Velldal, Erik; Østgulen, Wilfred; Øvrelid, Lilja; Myhre, Aslak Sira; Johansson, Richard; Stymne, Sara
The use of copyrighted materials in training language models raises critical legal and ethical questions. This paper presents a framework for and the results of empirically assessing the impact of publisher-controlled copyrighted corpora on the performance of generative large language models (LLMs) for Norwegian. When evaluated on a diverse set of tasks, we found that adding both books and newspapers to the data mixture of LLMs tend to improve their performance, while the addition of fiction works seems to be detrimental. Our experiments could inform the creation of a compensation scheme for authors whose works contribute to AI development.