Journal of Informatics and Advanced Computing
Vol 7 No 1 (2026): Journal of Informatics and Advanced Computing

Classifying American Sign Language Alphabets with a Chirality-Preserving CNN and Adaptive Augmentation Strategy

Faris Maulana (Universitas Pancasila)
Desti Fitriati (Program Studi Teknik Informatika Universitas Pancasila)



Article Info

Publish Date
15 May 2026

Abstract

Hearing and speech disabilities isolate millions from everyday social interaction; automated sign language interpretation offers a practical avenue for bridging this divide. This paper presents a Convolutional Neural Network that classifies 24 static hand postures constituting the American Sign Language (ASL) alphabet. Three distinguishing design decisions shape the proposed system: per-block batch normalization that stabilizes activation statistics at every spatial resolution stage, stochastic dropout applied at two architectural depths, and a chirality-preserving augmentation pipeline that deliberately omits axis-flip transforms because mirrored ASL handshapes encode different letters. Trained on 27,455 grayscale images drawn from the Sign Language MNIST repository and evaluated on a held-out partition of 7,172 samples, the network achieves 99.85% training accuracy and 100.00% test accuracy after 20 epochs with Adam optimization. All 24 gesture categories attain precision, recall, and F1-score of 1.00. At 263,749 trainable weights totalling roughly 1 MB, the architecture proves viable for deployment on edge and mobile hardware without pre-trained backbone dependencies.

Copyrights © 2026






Journal Info

Abbrev

jiac

Publisher

Subject

Computer Science & IT

Description

Journal of Informatics and Advanced Computing is a leading scientific publication platform that presents the latest and innovative research in the field of informatics and computing. This journal highlights the latest developments, practical applications, and significant impacts of computing ...