nad a22 4500 555163202 20190202120452.0 cr unu---uuuuu 190202s2018 xx s 000 0 eng 10.5167/uzh-162395 doi (ZORA)oai:www.zora.uzh.ch:162395 000 ddc 410 ddc Clematide Simon Crowdsourcing the OCR Ground Truth of a German and French Cultural Heritage Corpus [Elektronische Daten] [Simon Clematide, Lenz Furrer, Martin Volk] openAccess eu-repo Crowdsourcing approaches for post-correction of OCR output (Optical Character Recognition) have been successfully applied to several historical text collections. We report on our crowd-correction platform Kokos, which we built to improve the OCR quality of the digitized yearbooks of the Swiss Alpine Club (SAC) from the 19th century. This multilingual heritage corpus consists of Alpine texts mainly written in German and French, all typeset in Antiqua font. Finding and engaging volunteers for correcting large amounts of pages into high quality text requires a carefully designed user interface, an easy-to-use workflow, and continuous efforts for keeping the participants motivated. More than 180,000 characters on about 21,000 pages were corrected by volunteers in about 7 months, achieving an OCR ground truth with a systematically evaluated accuracy of 99.7 on the word level. The crowdsourced OCR ground truth and the corresponding original OCR recognition results from Abbyy FineReader for each page are available as a resource for machine learning and evaluation. Additionally, the scanned images (300 dpi) of all pages are included to enable tests with other OCR software. Institute of Computational Linguistics zora ocr zora crowdsourcing zora Furrer Lenz joint author Volk Martin joint author Journal for Language Technology and Computational Linguistics (JLCL) 33(1):25-47 https://www.zora.uzh.ch/id/eprint/162395/1/ClematideFurrer2018.pdf text/html WWW-Backlink auf das Repository Onlinezugriff via WWW text/html https://jlcl.org/content/2-allissues/1-heft1-2018/jlcl_2018-1_2.pdf ZORA 1 Journal Article PeerReviewed zora SNSF/Projectfunding/CRSII5_173719/CH zora grantAgreement ZORA 856 40 https://www.zora.uzh.ch/id/eprint/162395/1/ClematideFurrer2018.pdf text/html WWW-Backlink auf das Repository ZORA 856 42 Onlinezugriff via WWW text/html https://jlcl.org/content/2-allissues/1-heft1-2018/jlcl_2018-1_2.pdf ZORA 100 1- Clematide Simon ZORA 700 1- Furrer Lenz joint author ZORA 700 1- Volk Martin joint author ZORA 773 0- Journal for Language Technology and Computational Linguistics (JLCL) 33(1):25-47 BK010053 XK010053 XK010000 ZORA ZORA ZORA Journal Article openAccess