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At the very least, such tools should perform automatic SL recognition (SLR) of non-studio quality videos in a signer-independent (SI) fashion, thus providing simple binary feedback on learners\u2019 signing under realistic usage scenarios. Motivated by the above and the lack of any such tools for the Greek SL (GSL), we have been developing the \u201cSL-ReDu\u201d education platform for both receptive and productive GSL learning and student assessment. In this paper, we present our SLR module for GSL, developed for and integrated to the \u201cSL-ReDu\u201d system. The module incorporates state-of-the-art deep-learning based visual detection, feature extraction, and classification, operates in an SI mode on web-cam videos, and accommodates a small-size vocabulary of isolated signs and continuously fingerspelled letter sequences. We train the module on collected GSL data and demonstrate its superiority over a number of alternative SLR algorithms. We then conduct its objective evaluation within the \u201cSL-ReDu\u201d system and carry out a subjective evaluation of the overall platform, obtaining very satisfactory results in both.<\/jats:p>","DOI":"10.1007\/s10209-023-01017-7","type":"journal-article","created":{"date-parts":[[2023,7,23]],"date-time":"2023-07-23T10:01:28Z","timestamp":1690106488000},"page":"51-68","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Greek sign language recognition for an education platform"],"prefix":"10.1007","volume":"24","author":[{"given":"Katerina","family":"Papadimitriou","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gerasimos","family":"Potamianos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Galini","family":"Sapountzaki","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Theodoros","family":"Goulas","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eleni","family":"Efthimiou","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stavroula-Evita","family":"Fotinea","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Petros","family":"Maragos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2023,7,23]]},"reference":[{"key":"1017_CR1","volume-title":"The Study of Signed Languages: Essays in Honor of William C. 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