Open AccessFacial Expression Analysis in Brazilian Sign Language for Sign Recognition
Author(s) -
Rúbia Reis Guerra,
Tamires Martins Rezende,
Frederico Gadelha Guimarães,
Sílvia Grasiella Moreira Almeida
Publication year - 2018
Language(s) - English
Resource type - Conference proceedings
DOI - 10.5753/eniac.2018.4418
Subject(s) - computer science , sign language , gesture , support vector machine , speech recognition , facial expression , sign (mathematics) , gesture recognition , feature extraction , feature (linguistics) , artificial intelligence , natural language processing , linguistics , mathematics , mathematical analysis , philosophy
Sign language is one of the main forms of communication used by the deaf community. The language’s smallest unit, a “sign”, comprises a series of intricate manual and facial gestures. As opposed to speech recognition, sign language recognition (SLR) lags behind, presenting a multitude of open challenges because this language is visual-motor. This paper aims to explore two novel approaches in feature extraction of facial expressions in SLR, and to propose the use of Random Forest (RF) in Brazilian SLR as a scalable alternative to Support Vector Machines (SVM) and k-Nearest Neighbors (k-NN). Results show that RF’s performance is at least comparable to SVM’s and k-NN’s, and validate non-manual parameter recognition as a consistent step towards SLR.