Real-Time Detection of Turkish Sign Language Letters and Numbers with Deep Learning

Year 2025, Volume: 13 Issue: 2, 31 - 41, 31.05.2025

Abdil Karakan , Yüksel Oğuz

https://doi.org/10.21541/apjess.1495405

Abstract

The visual language that hearing or speech-impaired individuals communicate with through facial expressions and hand movements is called sign language. The rate of reading and writing sign language is very low. For this reason, hearing or speech-impaired individuals have great difficulty in communicating with other people, especially when benefiting from services such as hospitals and education. In this study, real-time sign language detection and display on the computer screen were performed with deep learning. The movements of hearing or speech-impaired individuals shown with their hands and fingers are detected in front of the camera. As a result of detection, the letter corresponding to the movement is recognized and displayed on the computer screen. YOLOv8 architecture was used in this method. First, a data set was created for the study. The data set consists of 29 letters and 10 numbers. Photographs of sign language movements from 100 different people were taken in the data set. Different changes were made to the photographs in the data set. With these additions, the error that may occur due to any distortion that may occur from the camera was minimized. With the changes made to the photographs, the number of photographs forming the data set increased to 11079. As a result of the study, average stability was 90.7%, mAP was 85.8%, and recall was 81.4%.

Keywords

sign language , sign language recognition , deep learning , YOLOv8 , Letter and Number Detection

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